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Sample records for dsp based beam

  1. DSP Based Waveform Generator

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The DSP Based Waveform Generator is used for CSR Control system to control special controlled objects, such as the pulsed power supply for magnets, RF system, injection and extraction synchronization, global CSR synchronization etc. This intelligent controller based on 4800 MIPS DSP and 256M SDRAM technology will supply highly stable and highly accurate reference waveform used by the power supply of magnets. The specifications are as follows:

  2. A DSP-Based Beam Current Monitoring System for Machine Protection Using Adaptive Filtering

    Energy Technology Data Exchange (ETDEWEB)

    J. Musson; H. Dong; R. Flood; C. Hovater; J. Hereford

    2001-06-01

    The CEBAF accelerator at Jefferson Lab is currently using an analog beam current monitoring (BCM) system for its machine protection system (MPS), which has a loss accuracy of 2 micro-amps. Recent burn-through simulations predict catastrophic beam line component failures below 1 micro-amp of loss, resulting in a blind spot for the MPS. Revised MPS requirements target an ultimate beam loss accuracy of 250 nA. A new beam current monitoring system has been developed which utilizes modern digital receiver technology and digital signal processing concepts. The receiver employs a direct-digital down converter integrated circuit, mated with a Jefferson Lab digital signal processor VME card. Adaptive filtering is used to take advantage of current-dependent burn-through rates. Benefits of such a system include elimination of DC offsets, generic algorithm development, extensive filter options, and interfaces to UNIX-based control systems.

  3. TOPOLOGY FOR A DSP BASED BEAM CONTROL SYSTEM IN THE AGS BOOSTER.

    Energy Technology Data Exchange (ETDEWEB)

    DELONG,J.BRENNAN,J.M.HAYES,T.LE,T.N.SMITH,K.

    2003-05-12

    The AGS Booster supports beams of ions and protons with a wide range of energies on a pulse-by-pulse modulation basis. This requires an agile beam control system highly integrated with its controls. To implement this system digital techniques in the form of Digital Signal Processors, Direct Digital Synthesizers, digital receivers and high speed Analog to Digital Converters are used. Signals from the beam and cavity pick-ups, as well as measurements of magnetic field strength in the ring dipoles are processed in real time. To facilitate this a multi-processor topology with high bandwidth data links is being designed.

  4. Control of Multibunch Longitudinal Instabilities and Beam Diagnostics Using a DSP-based Feedback System

    Energy Technology Data Exchange (ETDEWEB)

    Teytelman, Dmitry

    2000-03-30

    A bunch-by-bunch longitudinal feedback system has been designed and built to control coupled-bunch instabilities in the PEP-II machine. A prototype system has been installed at the Advanced Light Source at LBNL. Programmable DSPs allow longitudinal feedback processing in conjunction with data acquisition or instrumentation algorithms. Here the authors describe techniques developed for different beam and system diagnostics, such as measurements of the modal growth and damping rates and measurements of the bunch-by-bunch currents. Results from the Advanced Light Source are presented to illustrate these techniques.

  5. Research of Camera Calibration Based on DSP

    Directory of Open Access Journals (Sweden)

    Zheng Zhang

    2013-09-01

    Full Text Available To take advantage of the high-efficiency and stability of DSP in the data processing and the functions of OpenCV library, this study brought forward a scheme that camera calibration in DSP embedded system calibration. An arithmetic of camera calibration based on OpenCV is designed by analyzing the camera model and lens distortion. The transplantation of EMCV to DSP is completed and the arithmetic of camera calibration is migrated and optimized based on the CCS development environment and the DSP/BIOS system. On the premise of realizing calibration function, this arithmetic improves the efficiency of program execution and the precision of calibration and lays the foundation for further research of the visual location based on DSP embedded system.

  6. DSP

    Energy Technology Data Exchange (ETDEWEB)

    Cha, Yeong Bae

    2000-01-15

    The contents of this book are instructions of MDE-DSP training kit, Inner structure of TMS320C50 : TMS320C50 mode, CALU and memory structure, Types of command such as data transmission, circular addressing mode, Nop and subroutine call command, An assembler, Linker and serial monitor, TMS320C50 interface on memory, I/O interface timing, program memory, local data memory and DMA, Interrupt about peripheral control, reset and outer interrupt, Timer about inner structure of timer and timer experience, serial port, TDM serial port, keyboard and LCD, D/A and A/D converter, 8255A/8251A, Language, Instruction mapping of CSx-to-C5x and MDE-DSP kit circuit diagram.

  7. Hyperspectral image data compression based on DSP

    Science.gov (United States)

    Fan, Jiming; Zhou, Jiankang; Chen, Xinhua; Shen, Weimin

    2010-11-01

    The huge data volume of hyperspectral image challenges its transportation and store. It is necessary to find an effective method to compress the hyperspectral image. Through analysis and comparison of current various algorithms, a mixed compression algorithm based on prediction, integer wavelet transform and embedded zero-tree wavelet (EZW) is proposed in this paper. We adopt a high-powered Digital Signal Processor (DSP) of TMS320DM642 to realize the proposed algorithm. Through modifying the mixed algorithm and optimizing its algorithmic language, the processing efficiency of the program was significantly improved, compared the non-optimized one. Our experiment show that the mixed algorithm based on DSP runs much faster than the algorithm on personal computer. The proposed method can achieve the nearly real-time compression with excellent image quality and compression performance.

  8. Design of Industrial Robotic Controller Based on DSP

    Institute of Scientific and Technical Information of China (English)

    谈世哲; 杨汝清

    2003-01-01

    This paper describes the design of industrial robot controller based on the DSP technology. Robotic real time control is realized by PC and DSP motion control card and this method improves the performance of robotic controller. Finally this paper gives some experiment results and conclusion.

  9. Design of Fuze Antenna Beamformer Based on DSP

    Institute of Scientific and Technical Information of China (English)

    FENG Qing-juan; HUANG Zhong-hua; LI Ping

    2007-01-01

    According to the algorithm of the fuze antenna beamforming and the requirement for the realtime performence,a fuze antenna beamformer based on digital signal processor (DSP) was designed.The program was written in C,and in order to reduce the operation time of DSP,the key part of the matrix operation was written in simple algorithm.The precise and speediness of DSP calculation results were analyzed through Matlab and the Profiling tools in Code Composer Studio (CCS).The results show that the precise and the speediness both can satisfy the requirement for the fuze antenna beamforming.

  10. Chaos-based cryptosystem on DSP

    Energy Technology Data Exchange (ETDEWEB)

    Guglielmi, Veronique [Laboratoire ELIAUS, University of Perpignan, 52 Avenue Paul Alduy, 66860 Perpignan cedex 9 (France)], E-mail: veronique.guglielmi@univ-perp.fr; Pinel, Pierre; Fournier-Prunaret, Daniele; Taha, Abdel-Kaddous [Laboratoire LATTIS, INSA Toulouse, 135 Avenue de Rangueil, 31077 Toulouse cedex 4 (France)

    2009-11-30

    We present a numeric chaos-based cryptosystem, implemented on a Digital Signal Processor (DSP), which resists all the attacks we have thought of. The encryption scheme is a synchronous stream cipher. Its security arises from the properties of the trajectories in a chaotic attractor, reinforced by the use of a nonlinear non-invertible two-dimensional map, the introduction of jumps between successive points of the orbits and the retaining of only one bit of the representation of real values. We describe the results obtained through a cryptanalytic study, we detail how to adjust the different parameters of the cryptosystem in order to ensure security, and we apply the NIST (National Institute of Standards and Technology) standard tests for pseudo-randomness to our construction. The originality of this work lies in the end in the way we were able to improve the security of our system, so that it is from now on possible to envisage the use, in more general cryptographic purposes, of other recurrences than those classically employed.

  11. Low Power Systolic Array Based Digital Filter for DSP Applications

    Directory of Open Access Journals (Sweden)

    S. Karthick

    2015-01-01

    Full Text Available Main concepts in DSP include filtering, averaging, modulating, and correlating the signals in digital form to estimate characteristic parameter of a signal into a desirable form. This paper presents a brief concept of low power datapath impact for Digital Signal Processing (DSP based biomedical application. Systolic array based digital filter used in signal processing of electrocardiogram analysis is presented with datapath architectural innovations in low power consumption perspective. Implementation was done with ASIC design methodology using TSMC 65 nm technological library node. The proposed systolic array filter has reduced leakage power up to 8.5% than the existing filter architectures.

  12. Implementation of GPR Signals De-Noising Based on DSP

    Institute of Scientific and Technical Information of China (English)

    CHEN Xiao-li; TIAN Mao; ZHOU Hui-lin

    2005-01-01

    An important issue of ground-penetrating radar (GPR) signals analysis is de-noising that is the guarantee of acquiring good detecting effect. The paper illustrates a successful application of digital single processor (DSP) based on wavelet shrinkage algorithm. In order to realize real-time GPR signals analysis, some key issues are discussed such as the realization of fast wavelet transformation, the selection of CPU chip and the optimization of data movement. Experimental results show that the DSP based application not only basically meets the real-time requirement of GPR signals analysis, but also assures the quality of the GPR signals analysis.

  13. Digital controlling for GMA welding machine based on DSP

    Institute of Scientific and Technical Information of China (English)

    华学明; 吴毅雄; 张勇; 焦馥杰; 于乾波

    2003-01-01

    This paper introduced a welding machine for GMAW using digital controlling method based on DSP (Digital Signal Process). By means of flexible programming according to welding technologies and experiences the suitable characteristics of welding machine, such as line compensation, welding voltage and current feedback, wire-feed driving, SCR trigging and so on, can be controlled and self-adjusted using digital signals. Through the designing based on DSP it is put out that the traditional hardware of control circuit is decreased greatly which can enhance the stability and reliability of welding machine. Finally, the welding experiment using CO2 shielding gas proves that the welding process is stable.

  14. Low Power Systolic Array Based Digital Filter for DSP Applications.

    Science.gov (United States)

    Karthick, S; Valarmathy, S; Prabhu, E

    2015-01-01

    Main concepts in DSP include filtering, averaging, modulating, and correlating the signals in digital form to estimate characteristic parameter of a signal into a desirable form. This paper presents a brief concept of low power datapath impact for Digital Signal Processing (DSP) based biomedical application. Systolic array based digital filter used in signal processing of electrocardiogram analysis is presented with datapath architectural innovations in low power consumption perspective. Implementation was done with ASIC design methodology using TSMC 65 nm technological library node. The proposed systolic array filter has reduced leakage power up to 8.5% than the existing filter architectures.

  15. Underwater Acoustic Image Transmission System Based on DSP

    Institute of Scientific and Technical Information of China (English)

    Cheng En; Xu Ru

    2002-01-01

    The underwater acoustic image transmission system based on the high-speed DSP device TMS320C549 has been studied. We use Goertzel algorithm for source decoding and MFSK for modulation. Turbo code is used for channel coding and decoding. The purpose is to implement underwater video image data transmission.

  16. The Real-Time Image Processing Technique Based on DSP

    Institute of Scientific and Technical Information of China (English)

    QI Chang; CHEN Yue-hua; HUANG Tian-shu

    2005-01-01

    This paper proposes a novel real-time image processing technique based on digital singnal processor (DSP). At the aspect of wavelet transform(WT) algorithm, the technique uses algorithm of second generation wavelet transform-lifting scheme WT that has low calculation complexity property for the 2-D image data processing. Since the processing effect of lifting scheme WT for 1-D data is better than the effect of it for 2-D data obviously, this paper proposes a reformative processing method: Transform 2-D image data to 1-D data sequence by linearization method, then process the 1-D data sequence by algorithm of lifting scheme WT. The method changes the image convolution mode,which based on the cross filtering of rows and columns. At the aspect of hardware realization, the technique optimizes the program structure of DSP to exert the operation power with the in-chip memorizer of DSP. The experiment results show that the real-time image processing technique proposed in this paper can meet the real-time requirement of video-image transmitting in the video surveillance system of electric power. So the technique is a feasible and efficient DSP solution.

  17. Model Based Design of Video Tracking Based on MATLAB/Simulink and DSP

    Directory of Open Access Journals (Sweden)

    Chachou Mohamed Yacine

    2014-05-01

    Full Text Available The implementation of digital image processing on electronic boards is a current problem. In this study, we present a Model-Based Design of video tracking based on Matlab/Simulink and DSP. The implementation on DSP, of multi-objects detection and tracking algorithms of two kinds of applications inside and outside, is obtained by using automatic code generation that is code composer studio. The transmission and reception of data is realized by a network connection via Ethernet port between DSP and PC. This allows us, in the future, to extend the number of DSP working in parallel and their IP addresses would be generated by a DHCP server.

  18. Parallel programming characteristics of a DSP-based parallel system

    Institute of Scientific and Technical Information of China (English)

    GAO Shu; GUO Qing-ping

    2006-01-01

    This paper firstly introduces the structure and working principle of DSP-based parallel system, parallel accelerating board and SHARC DSP chip. Then it pays attention to investigating the system's programming characteristics, especially the mode of communication, discussing how to design parallel algorithms and presenting a domain-decomposition-based complete multi-grid parallel algorithm with virtual boundary forecast (VBF) to solve a lot of large-scale and complicated heat problems. In the end, Mandelbrot Set and a non-linear heat transfer equation of ceramic/metal composite material are taken as examples to illustrate the implementation of the proposed algorithm. The results showed that the solutions are highly efficient and have linear speedup.

  19. A fast DSP-based calorimeter hit scanning system

    Energy Technology Data Exchange (ETDEWEB)

    Sekikawa, S.; Arai, I.; Suzuki, A.; Watanabe, A. [Tsukuba Univ., Ibaraki (Japan). Inst. of Phys.; Kuno, Y. [Department of Physics, National Laboratory for High Energy (KEK), Tsukuba, Ibaraki 305 (Japan); Marlow, D.R.; Mindas, C.R.; Wixted, R.L. [Physics Department, Princeton University, Princeton, NJ (United States)

    1997-08-11

    A custom made digital signal processor (DSP) based system has been developed to scan calorimeter hits read by a 32-channel FASTBUS waveform recorder board. The scanner system identifies hit calorimeter elements by surveying their discriminated outputs. This information is used to generate a list of addresses, which guides the read-out process. The system is described and measurements of the scan times are given. (orig.).

  20. [Portable lung function parameters testing system based on DSP].

    Science.gov (United States)

    Guo, Zhanshe; Yuan, Minzhong; Zhou, Hui

    2012-11-01

    Lung function monitoring is a critical technique for clinical medicine. Currently, the lung function testing devices used in our domestic hospitals are both expensive and bulky. A portable and accurate lung function parameters testing system is highly desired and is proposed in this paper. The hardware of the system is based on DSP technology. The breathing passage is designed with an aim suitable for the breathe and signal detection. We use the direct detection method to detect the gas flow, the breathing passage pressure and the breathing time. Thanks to the powerful data processing ability and the high operation speed of the DSP, breathing signals can be easily analyzed. Thus, several lung function parameters of clinical significance can be obtained. Experiments show that the accuracy of the system is better than 3%, and could meet the demand of the lung function testing.

  1. Research on DSP-based Asynchronous Motor Control Technology

    Directory of Open Access Journals (Sweden)

    Jun Yao

    2013-05-01

    Full Text Available The Motor in a variety of electrical transmission and position servo system occupies an extremely important position. After the DSP technology being applied to the motor control, the unification of the hardware and the flexibility of the software can be combined. Take the brushless DC motor for example, studied the mathematical model and the structure of the motor control system, also obtained the design scheme of the DSP-based asynchronous motor control system. With TI's 32 bit fixed point DSPTMS320F2812 as the core design of the hardware system, we wrote the system software, debug the motor control system and the results show that the system achieves the expected effect. The results of the research can be applied to brushless DC motor and other motor control, it will have a wide application prospects.

  2. DSP based inverter control for alternate energy systems

    Energy Technology Data Exchange (ETDEWEB)

    Shireen, Wajiha; Vanapalli, Srinivas [University of Houston, Houston, TX 77204-4022 (United States); Nene, Hrishikesh [Texas Instruments Inc., Houston, TX (United States)

    2007-04-15

    This paper presents a DSP based algorithm to control inverters used in interfacing alternate energy systems with the electric utility. Since a constant and ripple free dc bus voltage is not ensured at the output of alternate energy sources, the main aim of the proposed algorithm is to make the output of the inverter immune to the fluctuations in the dc input voltage. In this paper a modified space vector pulse width modulation (SVPWM) technique is proposed which will maintain the quality of the ac output of the inverter, regardless of the ripple present at the inverter input. The principle is explained qualitatively and extensive experiments have been carried out to verify and validate the proposed algorithm. A 16-bit fixed-point C2000 family DSP from Texas Instruments was used as the controller to implement the proposed control algorithm. (author)

  3. Modular uncooled video engines based on a DSP processor

    Science.gov (United States)

    Schapiro, F.; Milstain, Y.; Aharon, A.; Neboshchik, A.; Ben-Simon, Y.; Kogan, I.; Lerman, I.; Mizrahi, U.; Maayani, S.; Amsterdam, A.; Vaserman, I.; Duman, O.; Gazit, R.

    2011-06-01

    The market demand for low SWaP (Size, Weight and Power) uncooled engines keeps growing. Low SWaP is especially critical in battery-operated applications such as goggles and Thermal Weapon Sights. A new approach for the design of the engines was implemented by SCD to optimize size and power consumption at system level. The new approach described in the paper, consists of: 1. A modular hardware design that allows the user to define the exact level of integration needed for his system 2. An "open architecture" based on the OMAPTM530 DSP that allows the integrator to take advantage of unused hardware (FPGA) and software (DSP) resources, for implementation of additional algorithms or functionality. The approach was successfully implemented on the first generation of 25μm pitch BIRD detectors, and more recently on the new, 640 x480, 17 μm pitch detector.

  4. DSP-based multi-purpose control system for laser processing

    Institute of Scientific and Technical Information of China (English)

    U Tong-Hyok; ZHANG Guo-shun; XU Bao-zhong; GANG Bei; LI Cheng; WANG Meng

    2006-01-01

    A DSP-based control system for laser processing that enables the motion of laser beam in two dimensions,and the control of its power with PC or without PC is discussed. The operation and implementation of the control system along with the rapid processing of image data are presented. The purpose of the control system is to operate the laser equipments in such a manner that various programmable laser control signals are available for vector and bitmap processing of characters and pictures. This control system makes the laser processing more intelligent and flexible and can be used for welding, marking and engraving by lasers.

  5. [Research on automatic external defibrillator based on DSP].

    Science.gov (United States)

    Jing, Jun; Ding, Jingyan; Zhang, Wei; Hong, Wenxue

    2012-10-01

    Electrical defibrillation is the most effective way to treat the ventricular tachycardia (VT) and ventricular fibrillation (VF). An automatic external defibrillator based on DSP is introduced in this paper. The whole design consists of the signal collection module, the microprocessor controlingl module, the display module, the defibrillation module and the automatic recognition algorithm for VF and non VF, etc. This automatic external defibrillator has achieved goals such as ECG signal real-time acquisition, ECG wave synchronous display, data delivering to U disk and automatic defibrillate when shockable rhythm appears, etc.

  6. A hand vein recognition system based on DSP and CPLD

    Institute of Scientific and Technical Information of China (English)

    KANG Wen-xiong; CHEN Zi-yi; YANG Qing-qiang

    2010-01-01

    @@ The hand vein recognition system based on digital signal processing(DSP)and complex programmable logic device (CPLD)is designed according to the requirements for equipment volume,accuracy and reaction speed.The overall structure and detailed implementation of the system hardware architecture are discussed in this paper.Moreover,the design philosophy and specific realization of system software as well as core algorithms are explored.The recognition system owns many good characteristics,such as high-degree integration,simple structure,flexible programming,convenient application and so on,which make it suitable for circumstances with high requirements for personal identification.

  7. Design of vision-based soccer robot using DSP

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    A new design of vision-based soccer robot using the type TMS320F240 of DSPs for MiroSot series is presented. The DSP used enables cost-effective control of DC motor, and features fewer external components, lower system cost and better performances than traditional microcontroller. The hardware architecture of robot is firstly presented in detail, and then the software design is briefly discussed. The control structure of decision making subsystem is illuminated also in this paper. The conclusion and prospect are given at last.

  8. A DSP Based POD Implementation for High Speed Multimedia Communications

    Directory of Open Access Journals (Sweden)

    Chang Nian Zhang

    2002-09-01

    Full Text Available In the cable network services, the audio/video entertainment contents should be protected from unauthorized copying, intercepting, and tampering. Point-of-deployment (POD security module, proposed by OpenCableTM, allows viewers to receive secure cable services such as premium subscription channels, impulse pay-per-view, video-on-demand as well as other interactive services. In this paper, we present a digital signal processor (DSP (TMS320C6211 based POD implementation for the real-time applications which include elliptic curve digital signature algorithm (ECDSA, elliptic curve Diffie Hellman (ECDH key exchange, elliptic curve key derivation function (ECKDF, cellular automata (CA cryptography, communication processes between POD and Host, and Host authentication. In order to get different security levels and different rates of encryption/decryption, a CA based symmetric key cryptography algorithm is used whose encryption/decryption rate can be up to 75 Mbps. The experiment results indicate that the DSP based POD implementation provides high speed and flexibility, and satisfies the requirements of real-time video data transmission.

  9. DSP Based Direct Torque Control of Permanent Magnet Synchronous Motor (PMSM) using Space Vector Modulation (DTC-SVM)

    DEFF Research Database (Denmark)

    Swierczynski, Dariusz; Kazmierkowski, Marian P.; Blaabjerg, Frede

    2002-01-01

    DSP Based Direct Torque Control of Permanent Magnet Synchronous Motor (PMSM) using Space Vector Modulation (DTC-SVM)......DSP Based Direct Torque Control of Permanent Magnet Synchronous Motor (PMSM) using Space Vector Modulation (DTC-SVM)...

  10. DSP Based Direct Torque Control of Permanent Magnet Synchronous Motor (PMSM) using Space Vector Modulation (DTC-SVM)

    DEFF Research Database (Denmark)

    Swierczynski, Dariusz; Kazmierkowski, Marian P.; Blaabjerg, Frede

    2002-01-01

    DSP Based Direct Torque Control of Permanent Magnet Synchronous Motor (PMSM) using Space Vector Modulation (DTC-SVM)......DSP Based Direct Torque Control of Permanent Magnet Synchronous Motor (PMSM) using Space Vector Modulation (DTC-SVM)...

  11. Feedback control and beam diagnostic algorithms for a multiprocessor DSP system

    Energy Technology Data Exchange (ETDEWEB)

    Teytelman, D.; Claus, R.; Fox, J.; Hindi, H.; Linscott, I.; Prabhakar, S. [Stanford Linear Accelerator Center, P.O. Box 4349, Stanford, California 94309 (United States); Drago, A. [INFN---Laboratori Nazionali di Frascati, P.O. Box 13, I-00044 Frascati (Roma) (Italy); Stover, G. [Lawrence Berkeley Laboratory, 1 Cyclotron Road, Berkeley, California 94563 (United States)

    1997-01-01

    The multibunch longitudinal feedback system developed for use by PEP-II, ALS, and DA{Phi}NE uses a parallel array of digital signal processors (DSPs) to calculate the feedback signals from measurements of beam motion. The system is designed with general-purpose programmable elements which allow many feedback operating modes as well as system diagnostics, calibrations, and accelerator measurements. The overall signal processing architecture of the system is illustrated. The real-time DSP algorithms and off-line postprocessing tools are presented. The problems in managing 320k samples of data collected in one beam transient measurement are discussed and our solutions are presented. Example software structures are presented showing the beam feedback process, techniques for modal analysis of beam motion (used to quantify growth and damping rates of instabilities), and diagnostic functions (such as timing adjustment of beam pick-up and kicker components). These operating techniques are illustrated with example results obtained from the system installed at the Advanced Light Source at LBL. {copyright} {ital 1997 American Institute of Physics.}

  12. Feedback control and beam diagnostic algorithms for a multiprocessor DSP system

    Energy Technology Data Exchange (ETDEWEB)

    Teytelman, D.; Claus, R.; Fox, J.; Hindi, H.; Linscott, I.; Prabhakar, S. [Stanford Univ., CA (United States). Stanford Linear Accelerator Center; Drago, A. [INFN, Roma (Italy). Lab. Nazionali di Frascati; Stover, G. [Lawrence Berkeley Lab., CA (United States)

    1996-09-01

    The multibunch longitudinal feedback system developed for use by PEP-II, ALS and DA{Phi}NE uses a parallel array of digital signal processors to calculate the feedback signals from measurements of beam motion. The system is designed with general-purpose programmable elements which allow many feedback operating modes as well as system diagnostics, calibrations and accelerator measurements. The overall signal processing architecture of the system is illustrated. The real-time DSP algorithms and off-line postprocessing tools are presented. The problems in managing 320 K samples of data collected in one beam transient measurement are discussed and the solutions are presented. Example software structures are presented showing the beam feedback process, techniques for modal analysis of beam motion(used to quantify growth and damping rates of instabilities) and diagnostic functions (such as timing adjustment of beam pick-up and kicker components). These operating techniques are illustrated with example results obtained from the system installed at the Advanced Light Source at LBL.

  13. DSP-128:Stream Cipher Based On Discrete Log Problem And Polynomial Arithmetic

    Directory of Open Access Journals (Sweden)

    M. K. Suwais

    2008-01-01

    Full Text Available DSP-128 is a new multithreaded stream cipher based on the intractability of the Discrete Logarithm Problem (DLP with key size of 128-bit. The design of DSP-128 is divided into three stages: Initialization Stage, Keystream Generation Stage, and Encryption Stage. The design goal of DSP-128 is to come up with a secure stream cipher with good performance for data encryption. The experimental results show that the encryption rate of DSP-128 is one time slower (running on single processor than the widely adapted stream cipher RC4, with a higher level of security against possible cryptanalysis attacks. However, because of its multithreaded nature, DSP-128 can take the speed up advantage of multi-core processor architectures which are available widely.

  14. Study on UPF Harmonic Current Detection Method Based on DSP

    Energy Technology Data Exchange (ETDEWEB)

    Zhao, H J [Northwestern Polytechnical University, Xi' an 710072 (China); Pang, Y F [Xi' an University of Technology, Xi' an 710048 (China); Qiu, Z M [Xi' an University of Technology, Xi' an 710048 (China); Chen, M [Northwestern Polytechnical University, Xi' an 710072 (China)

    2006-10-15

    Unity power factor (UPF) harmonic current detection method applied to active power filter (APF) is presented in this paper. The intention of this method is to make nonlinear loads and active power filter in parallel to be an equivalent resistance. So after compensation, source current is sinusoidal, and has the same shape of source voltage. Meanwhile, there is no harmonic in source current, and the power factor becomes one. The mathematic model of proposed method and the optimum project for equivalent low pass filter in measurement are presented. Finally, the proposed detection method applied to a shunt active power filter experimental prototype based on DSP TMS320F2812 is developed. Simulation and experiment results indicate the method is simple and easy to implement, and can obtain the real-time calculation of harmonic current exactly.

  15. An endless polarization stabilizer based on DSP system

    Science.gov (United States)

    Zhao, Xinyuan; Weng, Xuan; Tian, Feng; Zhang, Xiaoguang

    2009-11-01

    An endless polarization stabilizer based on DSP system is reported. It can transform the state of polarization (SOP) of optical signal to any desired SOP and maintaining output signal at the desired SOP. Feedback controlling method is applied to the proposed polarization stabilizer. We design a target function relates to current SOP and the desired SOP in transmission link. It has only one extremum when SOP in transmission link is exactly the same with the desired SOP. Particle swarm optimization algorithm is employed to search the extremum point. To investigate performance of the proposed polarization stabilizer, HP11896A polarization controller is used as polarization scrambler. We test performance of the polarization stabilizer under rate 1 (~16 rad/s), 4 (~33 rad/s), and 8 ( ~65 rad/s), separately. Under the existing condition of our laboratory, the developed polarization stabilizer has the ability of stabilization up to 65 rad/s SOP changes (rate 8).

  16. DSP-based electric power assisted steering using BLDC motor

    Indian Academy of Sciences (India)

    R Murugan; S Nandakumar; M S Mohiyadeen

    2008-10-01

    This paper introduces a design and implementation of electrically assisted power steering (EAS) using BLDC motor for a vehicle. The control architecture consists of two layers of control, namely the vehicle speed associated control and the torque assist control. In the higher level of control architecture, the vehicle speed controller works as an assistance level controller for the steering effort. In the lower level, the torque controller gives the effort level control. This has been realized by torque sensor and vehicle sensor interfaced in the DSP. For implementing in the system, a DSP-based BLDC motor controller with three-phase inverter module is specially designed using Hall-effect sensor feedback and a single dc-link current sensor. This work is implemented in a Light Commercial Vehicle having a recirculating ball type gear. This is for the first time (EAS) being implemented for this type of vehicle any where in the world. Generally, EAS having clutch to disconnect the motor in high speed or abnormal conditions from the gear box. In this implementation the motor is directly coupled to gearbox without clutch and all abnormalities are handled by the processor. This is implemented without modifying the vehicle supply system like changing the existing alternator or rating of the battery and using the existing sensors. The design is such a way that the feel of the driver assistance can be varied easily at any time. The performance of the control system is experimentally verified and it is tested in one of the Light Commercial Vehicle (LCV).

  17. 基于 SD 卡的 DSP 自举模块设计%DSP bootload module based on SD card

    Institute of Scientific and Technical Information of China (English)

    董毅; 朱磊; 任静; 郭力

    2014-01-01

    Bootload module is an indispensable part in electronic systems based on TMS 320VC54x series DSP processor .In face of the problems that the DSP application occupy more and more storage space and requirements while users need a faster and more convenient way to update DSP program code .An DSP bootload module based on the SD card and LabVIEW is presented .This module consists of MCU module and graphical user interface software .MCU module manages and stores DSP user application code by u-sing znFAT file system and SD card .GUI software is designed for format conversion for the DSP user application code and is able to finish multi-step conversion operations within one click .The size of DSP application code is unrestricted and updating DSP application files on the PC is facilitating .Experiments show that DSP bootload module proposed is feasible .%针对DSP应用程序占用越来越大存储空间的问题以及用户对更新DSP程序代码的迫切需求,本文设计了一种基于SD卡的DSP自举模块。该模块由C8051F340单片机子模块与图形用户界面(GUI)组成。单片机子模块利用SD卡与znFAT文件系统存储并管理DSP用户应用程序代码,GUI软件可一键完成DSP用户应用程序代码的多步格式转换操作。本模块不仅使DSP应用程序代码大小不受限制,并且便于在PC机上更新DSP应用程序文件。

  18. Infrared Real-time Thermal System Based on DSP

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    An infrared real-time imaging system using DSP(digital signal processor) as the kernel of digital signal processing board is presented. In this system, the imaging difference and nonuniformity correction method is developed on the chip taking advantage of DSP with high speed. The method combines hardware and software together, so that the difficulty for realizing such a method with other hardware can be overcome.

  19. RESEARCH AND DEVELOPMENT OF DSP-BASED FACE RECOGNITION SYSTEM FOR ROBOTIC REHABILITATION NURSING BEDS

    Directory of Open Access Journals (Sweden)

    Ming XING

    2016-04-01

    Full Text Available This article describes the development of DSP as the core of the face recognition system, on the basis of understanding the background, significance and current research situation at home and abroad of face recognition issue, having a in-depth study to face detection, Image preprocessing, feature extraction face facial structure, facial expression feature extraction, classification and other issues during face recognition and have achieved research and development of DSP-based face recognition system for robotic rehabilitation nursing beds. The system uses a fixed-point DSP TMS320DM642 as a central processing unit, with a strong processing performance, high flexibility and programmability.

  20. A DSP based power electronics interface for alternative /renewable energy system.

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-09-28

    This report is an update on the research project involving the implementation of a DSP-based power electronics interface for alternate/renewable energy systems, that was funded by the Department of Energy under the Inventions and Innovations program.

  1. The Artificial Reverberation Real-time Processing System Based On DSP

    Institute of Scientific and Technical Information of China (English)

    WEN Chuan-xue; ZHENG Sheng-lin; ZHANG Cheng-yun

    2008-01-01

    A real-time process system of artificial reverberation based on fixed-point DSP is presented in this paper. This paper dis- cusses the hardware interface and software between TMS320VC5509 DSP chip and TLV320AIC23 cedee chip. Based on this, it intro- duces the design and working of the artificial reverberation algorithm. At last, the paper discusses the sticking point in realization of real-time process.

  2. DSP based coherent receiver for phase-modulated radio-over-fiber optical links

    DEFF Research Database (Denmark)

    Zibar, Darko; Tafur Monroy, Idelfonso; Peucheret, Christophe

    2008-01-01

    A novel DSP based coherent receiver for phase modulated radio-over-fiber optical links is reported. Using the proposed digital receiver, signal demodulation of 1.25 Gb/s ASK-modulated 10 GHz RF carrier is experimentally demonstrated.......A novel DSP based coherent receiver for phase modulated radio-over-fiber optical links is reported. Using the proposed digital receiver, signal demodulation of 1.25 Gb/s ASK-modulated 10 GHz RF carrier is experimentally demonstrated....

  3. The Predigest Project of TCP/IP Protocol Communication System Based on DSP Technology and Ethernet

    Science.gov (United States)

    hong-you, Wang; san-ping, Zhao

    The paper introduce a predigest project of TCP/IP based on DSP CMOS chip TMS320F2407 and Ethernet interface. The system design the Network Interface Controller using TMS320F2407and TRL8019AS,it simplify TCP/IP, achieve simple protocol stack in DSP, and achieve Data transmission by software program. The experiment indicated that, the communication system constructed by TMS320F2407andTRL8019AS is low cast, simple and reliable.

  4. Infrared Image Real-time Enhancement Based on DSP

    Institute of Scientific and Technical Information of China (English)

    DAI Shao-sheng; YUAN Xiang-hui; XUE Lian

    2004-01-01

    Since image real- time processing requires vast amount of computation and high- speed hardware,it is difficult to be implemented with general microcomputer system. In order to solve the problem,a powerful digital signal processing (DSP) hardware system is proposed,which is able to meet needs of image real-time processing. There are many approaches to enhance infrared image. But only histogram equalization is discussed because it is the most common and effective way. On the basis of histogram equalization principle, the specific procedures implemented in DSP are shown. At last the experimental results are given.

  5. Design of dual DC motor control system based on DSP

    Science.gov (United States)

    Shi, Peicheng; Wang, Suo; Xu, Zengwei; Xiao, Ping

    2017-08-01

    Multi-motor control systems are widely used in actual production and life, such as lifting stages, robots, printing systems. This paper through serial communication between PC and DSP, dual DC motor control system consisting of PC as the host computer, DSP as the lower computer with synchronous PWM speed regulation, commutation and selection functions is designed. It sends digital control instructions with host computer serial debugger to lower computer, to instruct the motor to complete corresponding actions. The hardware and software design of the control system are given, and feasibility and validity of the control system are verified by experiments. The expected design goal is achieved.

  6. DSP Platform Benchmarking : DSP Platform Benchmarking

    OpenAIRE

    Xinyuan, Luo

    2009-01-01

    Benchmarking of DSP kernel algorithms was conducted in the thesis on a DSP processor for teaching in the course TESA26 in the department of Electrical Engineering. It includes benchmarking on cycle count and memory usage. The goal of the thesis is to evaluate the quality of a single MAC DSP instruction set and provide suggestions for further improvement in instruction set architecture accordingly. The scope of the thesis is limited to benchmark the processor only based on assembly coding. The...

  7. DSP Based System for Real time Voice Synthesis Applications Development

    CERN Document Server

    Arsinte, Radu; Miron, Costin

    2008-01-01

    This paper describes an experimental system designed for development of real time voice synthesis applications. The system is composed from a DSP coprocessor card, equipped with an TMS320C25 or TMS320C50 chip, voice acquisition module (ADDA2),host computer (IBM-PC compatible), software specific tools.

  8. A LabVIEW based Remote DSP Laboratory

    Directory of Open Access Journals (Sweden)

    Athanasios Kalantzopoulos

    2008-07-01

    Full Text Available Remote laboratories provide the students with the capability to perform laboratory exercises exploiting the relevant equipment any time of the day without their physical presence. Furthermore, providing the ability to use a single workstation by more than one student, they contribute to the reduction of the laboratory cost. Turning to advantage the above and according to the needs of post graduate modules in the fields of DSP Systems Design and Signal Processing Systems with DSPs, we designed and developed a Remote DSP Laboratory. A student using a Web Browser has the ability via internet to turn to account the R-DSP Lab and perform experiments using DSPs (Digital Signal Processors. For now, there is the opportunity to carry out laboratory exercises such as FIR, IIR digital filters and FFT as well as run any executable file developed by the user. In any case the observation of the results is carried out through the use of specially designed Graphical User Interfaces (GUIs.

  9. Implementation of DSP Based Cost Effective Inverter Fed Induction Motor Drive with VisSim

    Science.gov (United States)

    Mohanty, Nalin K.; Muthu, Ranganath

    2012-03-01

    The implementation of a Digital Signal Processor (DSP) based high-performance cost effective fed Induction Motor drive with VisSim/Embedded Controls Developer (ECD) is presented in this paper. In the experimental work VisSim/ECD software automatically converts the in built block diagram to C code and compiles, links, and downloads the code to DSP processor TMS320F2812. The DSP processor generates the required PWM to a cost effective ie four switch 3-phase (FSTPI) inverter. The power circuit of FSTPI fed drive system consists of an IGBT based FSTPI bridge inverter module feeding to a 5 hp three-phase squirrel cage induction motor. In this work the speed of induction motor output is shown by the GUI of VisSim/ECD and SPWM pulses, line voltages and line current output curves are shown using digital storage oscilloscope to demonstrate the feasibility of the system.

  10. A Real-Time System for Lane Detection Based on FPGA and DSP

    Science.gov (United States)

    Xiao, Jing; Li, Shutao; Sun, Bin

    2016-12-01

    This paper presents a real-time lane detection system including edge detection and improved Hough Transform based lane detection algorithm and its hardware implementation with field programmable gate array (FPGA) and digital signal processor (DSP). Firstly, gradient amplitude and direction information are combined to extract lane edge information. Then, the information is used to determine the region of interest. Finally, the lanes are extracted by using improved Hough Transform. The image processing module of the system consists of FPGA and DSP. Particularly, the algorithms implemented in FPGA are working in pipeline and processing in parallel so that the system can run in real-time. In addition, DSP realizes lane line extraction and display function with an improved Hough Transform. The experimental results show that the proposed system is able to detect lanes under different road situations efficiently and effectively.

  11. Online Monitoring System Design of Intelligent Circuit Breaker Based on DSP and ARM

    Directory of Open Access Journals (Sweden)

    Meng Song

    2014-08-01

    Full Text Available In order to accurately analyze the dynamic characteristics of the vacuum circuit breaker, a dual-core master-slave processor structure for online monitoring system based on DSP and ARM is proposed. This structure consists of host computer, lower computer and signal processing modules. The lower computer uses DSP as the core, which completes acquisition and data preprocessing of circuit breaker’s dynamic characteristics through sensors and signal conditioning circuits. The host computer uses ARM as the core which is responsible for task management, analysis, processing and displaying collected data via Ethernet. The communication between DSP and ARM is conducted by HPI. This design improves the reliability of intelligent control unit for the circuit breaker. The experiment showed that this system works steadily and accuracy.

  12. Research of Data Acquisition and Analysis System for Internal Combustion Engine Based on DSP

    Energy Technology Data Exchange (ETDEWEB)

    Gao, Y H [Center of Test Science of Jilin University, Chang chun, 130022 (China); Tian, X L [College of Instrumentation and Electrical Engineering of Jilin University, Jilin (China); Cheng, P [Center of Test Science of Jilin University, Chang chun, 130022 (China); Chang, X [College of Instrumentation and Electrical Engineering of Jilin University, Jilin (China); Dou, W J [College of Instrumentation and Electrical Engineering of Jilin University, Jilin (China)

    2006-10-15

    In the paper, the structure, working principle, functions and characteristics of an data acquisition and analysis system for internal combustion engines (I.C. engine) based on DSP is introduced. The DSP can not only acquire and analyze the data alone, also can work with the PC together to form data acquisition and analysis system with high speed and large memory. The system takes advantages of TMS320F2812's plenty of peripherals on chip, becomes small and easy for installation. USB technique is used to translate data between DSP and PC in high speed, so the system's real time processing is proved very much. It is proved that the designed system can acquire and analyze the steady and transient parameters of the I.C. engine very well.

  13. Development of a DSP-based real-time position calculation circuit for a beta camera

    CERN Document Server

    Yamamoto, S; Kanno, I

    2000-01-01

    A digital signal processor (DSP)-based position calculation circuit was developed and tested for a beta camera. The previous position calculation circuit which employed flash analog-to-digital (A-D) converters for A-D conversion and ratio calculation produced significant line artifacts in the image due to the differential non-linearity of the A-D converters. The new position calculation circuit uses four A-D converters for A-D conversion of the analog signals from the position sensitive photomultiplier tube (PSPMT). The DSP reads the A-D signals and calculates the ratio of X sub a /(X sub a +X sub b) and Y sub a /(Y sub a +Y sub b) on an event-by-event basis. The DSP also magnifies the image to fit the useful field of view (FOV) and rejects the events out of the FOV. The line artifacts in the image were almost eliminated.

  14. Implementation of a DSP-based hybrid sensor for switched reluctance motor converter

    Energy Technology Data Exchange (ETDEWEB)

    Whei-Min Lin; Ching-Ming Hong; Huang-Chen Chien [Department of Electrical Engineering National Sun Yat-Sen University, Kaohsiung 80424, Taiwan, R.O.C. (China); Huang-Chen Chien [Electronic Communication Engineering, National Kaohsiung Marine University, Kaohsiung 81157, Taiwan, R.O.C. (China)

    2010-07-01

    The Switched Reluctance Motor (SRM) inherits a simple and reliable structure with an economical manufacturing cost. The DC power output supplies the unipolar converter to control the pulses sent to SRM. Thus, the velocity and torque are controllable for various velocity commands, and the SRM is gaining more and more applications on high torque requirement field with constant power. This paper proposes a DSP based hybrid sensor for switched reluctance motor with easy implementation. The current transducer is used to monitor the energized current and proximity sensors for rotor salient. The signals are then fed back to DSP. This design will improve the performance of SRM to operate more smoothly.

  15. Implementation of a DSP-based hybrid sensor for switched reluctance motor converter

    Directory of Open Access Journals (Sweden)

    Whei-Min Lin, Chih-Ming Hong, Huang -Chen Chien, Huang-Chen Chien

    2010-09-01

    Full Text Available The Switched Reluctance Motor (SRM inherits a simple and reliable structure with an economical manufacturing cost. The DC power output supplies the unipolar converter to control the pulses sent to SRM. Thus, the velocity and torque are controllable for various velocity commands, and the SRM is gaining more and more applications on high torque requirement field with constant power. This paper proposes a DSP based hybrid sensor for switched reluctance motor with easy implementation. The current transducer is used to monitor the energized current and proximity sensors for rotor salient. The signals are then fed back to DSP. This design will improve the performance of SRM to operate more smoothly.

  16. [Design of high performance DSP-based gradient calculation module for MRI].

    Science.gov (United States)

    Pan, Wenyu; Zhang, Fu; Luo, Hai; Zhou, Heqin

    2011-05-01

    A gradient calculation module based on high performance DSP was designed to meet the needs of digital MRI spectrometer. According to the requirements of users, this apparatus can achieve rotation transformation, pre-emphasis, shimming and other gradient calculation functions in a single chip of DSP. It then outputs gradient waveform data of channel X, Y, Z and shimming data of channel B0. Experiments show that the design has good versatility and can satisfy the functional, speed and accuracy requirements of MRI gradient calculation. It provides a practical gradient calculation solution for the development of digital spectrometer.

  17. Triangle bipolar pulse shaping and pileup correction based on DSP

    Energy Technology Data Exchange (ETDEWEB)

    Esmaeili-sani, Vahid, E-mail: vaheed_esmaeely80@yahoo.com [Department of Nuclear Engineering and Physics, Amirkabir University of Technology, P.O. Box 4155-4494, Tehran (Iran, Islamic Republic of); Moussavi-zarandi, Ali; Akbar-ashrafi, Nafiseh; Boghrati, Behzad [Department of Nuclear Engineering and Physics, Amirkabir University of Technology, P.O. Box 4155-4494, Tehran (Iran, Islamic Republic of)

    2011-02-11

    Programmable Digital Signal Processing (DSP) microprocessors are capable of doing complex discrete signal processing algorithms with clock rates above 50 MHz. This combined with their low expense, ease of use and selected dedicated hardware make them an ideal option for spectrometer data acquisition systems. For this generation of spectrometers, functions that are typically performed in dedicated circuits, or offline, are being migrated to the field programmable gate array (FPGA). This will not only reduce the electronics, but the features of modern FPGAs can be utilized to add considerable signal processing power to produce higher resolution spectra. In this paper we report on an all-digital triangle bipolar pulse shaping and pileup correction algorithm that is being developed for the DSP. The pileup mitigation algorithm will allow the spectrometers to run at higher count rates or with multiple sources without imposing large data losses due to the overlapping of scintillation signals. This correction technique utilizes a very narrow bipolar triangle digital pulse shaping algorithm to extract energy information for most pileup events.

  18. Rate-optimal scheduling of recursive DSP algorithms based on the scheduling-range chart

    NARCIS (Netherlands)

    Heemstra de Groot, Sonia M.; Herrmann, Otto E.

    1990-01-01

    A method for rate-optimal scheduling of recursive DSP algorithms is presented. The approach is based on the determination of the scheduling window of each operation and the construction of a scheduling-range chart. The information in the chart is used during scheduling to optimize some quality crite

  19. Brushless DC Motor Control System Design Based on DSP2812

    Directory of Open Access Journals (Sweden)

    Wei Min

    2016-01-01

    Full Text Available By comparison various control methods currently for permanent magnet brushless DC motor, on the basis of motor principle analysis, a current smallest and most real-time all-digital rare earth permanent magnet brushless DC motor control system is designed. The high-speed digital signal processor DSP2812 is applied as the main control unit. The fuzzy PID control algorithm is used to control rectifier regulator and speed, which the speed and current is double closed loop in the system. The principle of control system, control strategy and software is analyzed in this paper. The system has some features such as less overshoot, rapid response speed, good performance of anti-jamming, simple structure, high control precision, flexible in changing control policies and so on. Validity of the design is verified by prototype test.

  20. Customized DSP-based vibration measurement for wind turbines

    Energy Technology Data Exchange (ETDEWEB)

    LaWhite, N.E.; Cohn, K.E. [Second Wind Inc., Somerville, MA (United States)

    1996-12-31

    As part of its Advanced Distributed Monitoring System (ADMS) project funded by NREL, Second Wind Inc. is developing a new vibration measurement system for use with wind turbines. The system uses low-cost accelerometers originally designed for automobile airbag crash-detection coupled with new software executed on a Digital Signal Processor (DSP) device. The system is envisioned as a means to monitor the mechanical {open_quotes}health{close_quotes} of the wind turbine over its lifetime. In addition the system holds promise as a customized emergency vibration detector. The two goals are very different and it is expected that different software programs will be executed for each function. While a fast Fourier transform (FFT) signature under given operating conditions can yield much information regarding turbine condition, the sampling period and processing requirements make it inappropriate for emergency condition monitoring. This paper briefly reviews the development of prototype DSP and accelerometer hardware. More importantly, it reviews our work to design prototype vibration alarm filters. Two-axis accelerometer test data from the experimental FloWind vertical axis wind turbine is analyzed and used as a development guide. Two levels of signal processing are considered. The first uses narrow band pre-processing filters at key fundamental frequencies such as the 1P, 2P and 3P. The total vibration energy in each frequency band is calculated and evaluated as a possible alarm trigger. In the second level of signal processing, the total vibration energy in each frequency band is further decomposed using the two-axis directional information. Directional statistics are calculated to differentiate between linear translations and circular translations. After analyzing the acceleration statistics for normal and unusual operating conditions, the acceleration processing system described could be used in automatic early detection of fault conditions. 9 figs.

  1. Frequency-dependent performance analysis of a parallel DSP-based computer system

    Science.gov (United States)

    Christou, Ch. S.

    2014-11-01

    The performance of a shared-memory low-cost high-performance DSP-Based multiprocessor system [3] is investigated, by varying the frequency of the core processor from 200MHz to 1GHZ, in steps of 200 MHZ, and keeping constant parameters such as the shared-memory-access-time and the prefetching-workload-size. The innovation of this Parallel DSP-Based computer system is the introduction of two small programmable small fast memories (Twins) between the processor and the shared bus interconnect. While one memory (Twin) transfers data from/to the shared memory, the other Twin supplies the core DSP-processor with data. Results indicate an increase of the shared-bus bottleneck as the core DSP processors' clock-rate increases. Workload of the Twins is processed faster thus greater the demand of the shared-bus. Results show an effectively supported robust parallel shared-memory system where fewer but faster (clocked with higher frequency) processors produce the same execution times as a greater number of slower processors, with most system configurations achieving perfect speedups, mainly due to the twin-prefetching mechanism.

  2. The real-time complex cruise scene motion detection system based on DSP

    Science.gov (United States)

    Wu, Zhi-guo; Wang, Ming-jia

    2014-11-01

    Dynamic target recognition is an important issue in the field of image processing research. It is widely used in photoelectric detection, target tracking, video surveillance areas. Complex cruise scene of target detection, compared to the static background, since the target and background objects together and both are in motion, greatly increases the complexity of moving target detection and recognition. Based on the practical engineering applications, combining an embedded systems and real-time image detection technology, this paper proposes a real-time movement detection method on an embedded system based on the FPGA + DSP system architecture on an embedded system. The DSP digital image processing system takes high speed digital signal processor DSP TMS320C6416T as the main computing components. And we take large capacity FPGA as coprocessor. It is designed and developed a high-performance image processing card. The FPGA is responsible for the data receiving and dispatching, DSP is responsible for data processing. The FPGA collects image data and controls SDRAM according to the digital image sequence. The SDRAM realizes multiport image buffer. DSP reads real-time image through SDRAM and performs scene motion detection algorithm. Then we implement the data reception and data processing parallelization. This system designs and realizes complex cruise scene motion detection for engineering application. The image edge information has the anti-light change and the strong anti-interference ability. First of all, the adjacent frame and current frame image are processed by convolution operation, extract the edge images. Then we compute correlation strength and the value of movement offset. We can complete scene motion parameters estimation by the result, in order to achieve real-time accurate motion detection. We use images in resolution of 768 * 576 and 25Hz frame rate to do the real-time cruise experiment. The results show that the proposed system achieves real

  3. Design of a system based on DSP and FPGA for video recording and replaying

    Science.gov (United States)

    Kang, Yan; Wang, Heng

    2013-08-01

    This paper brings forward a video recording and replaying system with the architecture of Digital Signal Processor (DSP) and Field Programmable Gate Array (FPGA). The system achieved encoding, recording, decoding and replaying of Video Graphics Array (VGA) signals which are displayed on a monitor during airplanes and ships' navigating. In the architecture, the DSP is a main processor which is used for a large amount of complicated calculation during digital signal processing. The FPGA is a coprocessor for preprocessing video signals and implementing logic control in the system. In the hardware design of the system, Peripheral Device Transfer (PDT) function of the External Memory Interface (EMIF) is utilized to implement seamless interface among the DSP, the synchronous dynamic RAM (SDRAM) and the First-In-First-Out (FIFO) in the system. This transfer mode can avoid the bottle-neck of the data transfer and simplify the circuit between the DSP and its peripheral chips. The DSP's EMIF and two level matching chips are used to implement Advanced Technology Attachment (ATA) protocol on physical layer of the interface of an Integrated Drive Electronics (IDE) Hard Disk (HD), which has a high speed in data access and does not rely on a computer. Main functions of the logic on the FPGA are described and the screenshots of the behavioral simulation are provided in this paper. In the design of program on the DSP, Enhanced Direct Memory Access (EDMA) channels are used to transfer data between the FIFO and the SDRAM to exert the CPU's high performance on computing without intervention by the CPU and save its time spending. JPEG2000 is implemented to obtain high fidelity in video recording and replaying. Ways and means of acquiring high performance for code are briefly present. The ability of data processing of the system is desirable. And smoothness of the replayed video is acceptable. By right of its design flexibility and reliable operation, the system based on DSP and FPGA

  4. A portable detection instrument based on DSP for beef marbling

    Science.gov (United States)

    Zhou, Tong; Peng, Yankun

    2014-05-01

    Beef marbling is one of the most important indices to assess beef quality. Beef marbling is graded by the measurement of the fat distribution density in the rib-eye region. However quality grades of beef in most of the beef slaughtering houses and businesses depend on trainees using their visual senses or comparing the beef slice to the Chinese standard sample cards. Manual grading demands not only great labor but it also lacks objectivity and accuracy. Aiming at the necessity of beef slaughtering houses and businesses, a beef marbling detection instrument was designed. The instrument employs Charge-coupled Device (CCD) imaging techniques, digital image processing, Digital Signal Processor (DSP) control and processing techniques and Liquid Crystal Display (LCD) screen display techniques. The TMS320DM642 digital signal processor of Texas Instruments (TI) is the core that combines high-speed data processing capabilities and real-time processing features. All processes such as image acquisition, data transmission, image processing algorithms and display were implemented on this instrument for a quick, efficient, and non-invasive detection of beef marbling. Structure of the system, working principle, hardware and software are introduced in detail. The device is compact and easy to transport. The instrument can determine the grade of beef marbling reliably and correctly.

  5. Implementation on 2D- DCT Based on DSP Builder%基于DSP Bulider二维DCT实现

    Institute of Scientific and Technical Information of China (English)

    王小伟

    2008-01-01

    图像DCT(离散余弦变换)是图像压缩的一项重要技术,如何准确、快速地进行图像压缩一直是国内外研究的热点.首先阐述DCT算法原理以及适合硬件设计的快速算法,介绍DSP Builder信号处理平台,重点研究基于DSP Builder平台的2D-DCT硬件实现.在二维DCT时,采用一种存取数据时直接对数据转置的方法,以提高设计速度.然后在Model-sim 6.2平台下进行功能仿真.最后将DSP Builder模块转换成VHDL语言,并在Quartus RⅡ下进行编译和时序仿真,达到了理想的效果.

  6. 基于DSP/BIOS的PLC执行系统开发%Development of PLC execution system based-on DSP/BIOS

    Institute of Scientific and Technical Information of China (English)

    李建伟; 赖乙宗; 李松; 王世勇

    2013-01-01

    In this paper, the shortcoming of the Soft-PLC is analyzed, and the development of Soft-PLC execution system based on DSP/BIOS real-time system kernel running in embedded processor is put forward. Through the analysis of the architecture and operational principles of the Soft-PLC, the task scheduling program based on DSP/BIOS is given. Then, the PLC instruction execution library is established and running processes of Soft-PLC execution system is determined. Finally, the performance of the Soft-PLC execution system tests shows that Soft-PLC execution system based on embedded processor can effectively compensate for the shortcoming of soft PLC in real-time and stability, and has considerable development potential in the area of automatic control.%分析了目前软PLC在实时性方面存在的不足;提出采用基于DSP/BIOS实时内核的嵌入式处理器的软PLC执行系统架构.首先,通过分析软PLC执行系统的架构及工作原理,给出了基于DSP/BIOS的任务调度方案;其次,建立PLC指令的执行函数库,确定PLC执行系统的运行流程;最后,对该PLC执行系统性能进行的测试表明,基于嵌入式处理器的软PLC执行系统能有效地弥补软PIC在实时性及稳定性方面的不足,在自动控制方面具有相当大的发展潜力.

  7. An advanced compiler designed for a VLIW DSP for sensors-based systems.

    Science.gov (United States)

    Yang, Xu; He, Hu

    2012-01-01

    The VLIW architecture can be exploited to greatly enhance instruction level parallelism, thus it can provide computation power and energy efficiency advantages, which satisfies the requirements of future sensor-based systems. However, as VLIW codes are mainly compiled statically, the performance of a VLIW processor is dominated by the behavior of its compiler. In this paper, we present an advanced compiler designed for a VLIW DSP named Magnolia, which will be used in sensor-based systems. This compiler is based on the Open64 compiler. We have implemented several advanced optimization techniques in the compiler, and fulfilled the O3 level optimization. Benchmarks from the DSPstone test suite are used to verify the compiler. Results show that the code generated by our compiler can make the performance of Magnolia match that of the current state-of-the-art DSP processors.

  8. An Advanced Compiler Designed for a VLIW DSP for Sensors-Based Systems

    Directory of Open Access Journals (Sweden)

    Hu He

    2012-04-01

    Full Text Available The VLIW architecture can be exploited to greatly enhance instruction level parallelism, thus it can provide computation power and energy efficiency advantages, which satisfies the requirements of future sensor-based systems. However, as VLIW codes are mainly compiled statically, the performance of a VLIW processor is dominated by the behavior of its compiler. In this paper, we present an advanced compiler designed for a VLIW DSP named Magnolia, which will be used in sensor-based systems. This compiler is based on the Open64 compiler. We have implemented several advanced optimization techniques in the compiler, and fulfilled the O3 level optimization. Benchmarks from the DSPstone test suite are used to verify the compiler. Results show that the code generated by our compiler can make the performance of Magnolia match that of the current state-of-the-art DSP processors.

  9. Homology-based modeling of the Erwinia amylovora type III secretion chaperone DspF used to identify amino acids required for virulence and interaction with the effector DspE.

    Science.gov (United States)

    Triplett, Lindsay R; Wedemeyer, William J; Sundin, George W

    2010-09-01

    The structure of DspF, a type III secretion system (T3SS) chaperone required for virulence of the fruit tree pathogen Erwinia amylovora, was modeled based on predicted structural homology to characterized T3SS chaperones. This model guided the selection of 11 amino acid residues that were individually mutated to alanine via site-directed mutagenesis. Each mutant was assessed for its effect on virulence complementation, dimerization and interaction with the N-terminal chaperone-binding site of DspE. Four amino acid residues were identified that did not complement the virulence defect of a dspF knockout mutant, and three of these residues were required for interaction with the N-terminus of DspE. This study supports the significance of the predicted beta-sheet helix-binding groove in DspF chaperone function.

  10. 基于DSP+CPLD的捷联航姿系统设计与实现%Design and Realization of Strapdown AHRS Based on DSP & CPLD

    Institute of Scientific and Technical Information of China (English)

    宋国安; 曾庆化; 张斌; 胡倩倩

    2012-01-01

    针对捷联航姿系统高精度、小型化、高可靠性的发展需求,文中研究并实现了基于DSP+CPLD导航计算机的光纤航姿参考系统,在导航计算机设计中充分体现了DSP处理器实时解算和CPLD控制信号的双重优点.系统软件可实现加电BIT、磁罗差标定、CRC校验的存储器自检、捷联航姿解算和模糊自适应内阻尼卡尔曼滤波等功能.通过大量的试验验证了硬件的可靠性和算法的有效性.样机实验结果表明基于DSP和CPLD导航计算机的捷联惯性航姿系统性能稳定,满足系统的精度设计要求.%For development requirements of high-precision, miniaturization, reliability in the Strapdown AHRS, an optical AHRS based on DSP+CPLD navigation computer was designed and realized. During the design of navigation computer,the dual advantages of the realtime solving function of DSP and signals control of CPLD were considered. Realization of Strapdown AHRS software included fallowing functions,such as power BIT,magnetic compass calibration,CRC memory self-test,AHRS algorithm and Damp Kalman filtering. The Experiments prove that the system hardware is reliable,the software is available. Experiment results showed that the physical prototype of Strapdown AHRS based on DSP and CPLD navigation computer had wonderful performance and it can satisfy the accuracy requirements of required system.

  11. A DSP-based active power filter for low voltage distribution systems

    Energy Technology Data Exchange (ETDEWEB)

    Shireen, Wajiha [University of Houston, Houston, TX 77204-4020 (United States); Tao, Li [Schlumberger Inc., Houston, TX (United States)

    2008-09-15

    The use of nonlinear loads, which inject undesired harmonic currents into low voltage distribution systems, is increasing rapidly. Active power filters are being considered as a potential candidate for solving harmonic problems in order to meet harmonic standards and guidelines. A new digital signal processor (DSP)-based control method for a single-phase active power filter (APF) is presented in this paper. Compared to conventional analog-based methods, the DSP-based solution provides a flexible and cheaper method to control the APF. The proposed scheme employs a carrier-based control that requires less feedback information compared to other reported solutions. Only one current sensor is used to sense the nonlinear load current and two voltage sensors to sense the input supply voltage and the dc bus voltage. The proposed method provides both harmonic elimination and power factor correction. The PSpice simulation and experiments using the DSP-based prototype are made to verify the feasibility of the method. (author)

  12. Real-time DSP-based shape determination and plasma position control in the ISTTOK tokamak

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, B. E-mail: bernardo@cfn.ist.utl.pt; Fernandes, H.; Silva, C.; Borba, D.; Varandas, C.A.F

    2004-06-01

    We have developed a digital signal processor-based system for real-time control of the ISTTOK plasma position based on a low-cost digital signal processor (DSP) board. A novel plasma shape reproduction method was developed using a Cauchy-condition expansion applied to the vacuum region around the plasma. This method showed to be best suited than classic methods such as Legendre-Fourier expansion (LFE) or current filaments (CF), particularly in small tokamaks with passive stabilizer conductors where the presence of strong eddy currents can cause significant errors in magnetic field sensors. We compare the results of the boundary reconstruction method with the measurements from a microwave interferometer diagnostic. We present an implementation in the DSP system that allows the real time control of the plasma position with a required 1 ms period.

  13. A DSP based Three Phase Power Quality Analyzer for Motor Drives

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Woo Yong; Jung, Young Gook; Lim, Young Cheol [Chonnam National University, Kwangju (Korea)

    2001-02-01

    This paper presents a digital instrument for a DSP based power quality analysis in three phase power system there current waveform is non-sinusoidal. It is based on stand alone type TMS320C31 DSP (digital signal processor) board and on a special high-speed data acquisition system. Power quality of low power motor drives are analyzed and processed by using a simple average power algorithm, and results of power analysis are displayed by LCD in the proposed system. This paper also goes on to discuss the performance of an instrument prototype, both in terms of accuracy and speed of measurement under the transient and steady state condition. (author). 5 refs., 6 figs., 3 tabs.

  14. A DSP-based discrete space vector modulation direct torque control of sensorless induction machines

    Energy Technology Data Exchange (ETDEWEB)

    Khoucha, F.; Marouani, K.; Kheloui, A.; Aliouane, K.

    2004-07-01

    In this paper, we present a Direct Torque Control scheme of an induction motor operating without speed sensor. The estimation of the stator flux and the rotor speed is performed by an adaptive observer. In order to reduce the torque, flux, current and speed ripple a Discrete Space Vector Modulation (DSVM-DTC) strategy is implemented using a DSP-based hardware. To illustrate the performances of this control scheme, experimental results are presented. (author)

  15. Realization of Distribution Network Feeder Terminal Unit Based on Dual-DSP

    Directory of Open Access Journals (Sweden)

    Fanrong Wang

    2012-07-01

    Full Text Available This study presents the design proposal of distribution network monitoring unit based on dual-DSP. A detailed description of the hardware structure about the device is introduced which including signal scheduling, SPI communication, the serial human-computer communication and network communication. Also the study describes the software process about the master and slave DSPs. Then the analog precision test and the protection response test are carried out. The result shows that the design proposal is correct.

  16. A DSP based power electronics interface for alternate/renewable energy systems. Quarterly report 3.

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-31

    This report is an update on the research project involving the implementation of a DSP based power electronics interface for alternate/renewable energy systems that was funded by the Department of Energy under the Inventions and Innovations program 1998. The objective of this research is to develop a utility interface (dc to ac converter) suitable to interconnect alternate/renewable energy sources to the utility system. The DSP based power electronics interface in comparison with existing methods will excel in terms of efficiency, reliability and cost. Moreover DSP-based control provides the flexibility to upgrade/modify control algorithms to meet specific system requirements. The proposed interface will be capable of maintaining stiffness of the ac voltages at the point of common coupling regardless of variation in the input dc bus voltage. This will be achieved without the addition of any extra components to the basic interface topology but by inherently controlling the inverter switching strategy in accordance to the input voltage variation.

  17. Positioning approach based on Mach-Zehnder fiber sensors and a DSP processor

    Science.gov (United States)

    Wan, Xiong; Du, Tingting; Zhang, Zhimin; Zhang, Huaming; Wang, Peng

    2013-12-01

    A positioning system based on Mach-Zehnder optical fiber interferometer is proposed, which can sense vibration information along the circumference of the fiber sensor and hence be applied to positioning invasions as a safe-guard system in residence communities. A cross-correlation algorithm fulfilled with a DSP processor has been adopted to calculate the time difference of two channels of the Mach-Zehnder optical fiber interferometer. A signal identification algorithm is proposed to decrease the workload of the DSP when no vibration occurs. An experiment with 11.28 kilometers sensing fiber has been carried out, whose results show the Mach-Zehnder positioning system identifies the position of vibration instantaneously and has a 44 meters positioning error within the total sensing distance.

  18. A DSP-based multichannel analyzer for simultaneous acquisition of coincidence and anticoincidence spectra

    Energy Technology Data Exchange (ETDEWEB)

    Byun, S.H. [Medical Physics and Applied Radiation Sciences, McMaster University, Hamilton, ON, L8S 4K1 (Canada)], E-mail: soohyun@mcmaster.ca; Chin, K.; Prestwich, W.V.; McNeill, F.E.; Chettle, D.R. [Medical Physics and Applied Radiation Sciences, McMaster University, Hamilton, ON, L8S 4K1 (Canada)

    2007-10-15

    A digital signal processor (DSP) based multichannel analyzer (MCA) has been developed for simultaneous acquisition of coincidence and anticoincidence {gamma}-ray spectra. The shaped pulse from the spectroscopy amplifier is digitized by a flash analog-to-digital converter and then processed by a DSP. The coincidence mode operation is implemented by an external gate signal from a coincidence module. Fundamental performance was tested using NaI(Tl) detectors and compared with that of a standard NIM module. The new MCA is currently used for in vivo neutron activation analysis. Further development is in preparation toward full digital processing, which is free from the remaining analog component, that is the spectroscopy amplifier.

  19. Design of overload vehicle monitoring and response system based on DSP

    Science.gov (United States)

    Yu, Yan; Liu, Yiheng; Zhao, Xuefeng

    2014-03-01

    The overload vehicles are making much more damage to the road surface than the regular ones. Many roads and bridges are equipped with structural health monitoring system (SHM) to provide early-warning to these damage and evaluate the safety of road and bridge. However, because of the complex nature of SHM system, it's expensive to manufacture, difficult to install and not well-suited for the regular bridges and roads. Based on this application background, this paper designs a compact structural health monitoring system based on DSP, which is highly integrated, low-power, easy to install and inexpensive to manufacture. The designed system is made up of sensor arrays, the charge amplifier module, the DSP processing unit, the alarm system for overload, and the estimate for damage of the road and bridge structure. The signals coming from sensor arrays go through the charge amplifier. DSP processing unit will receive the amplified signals, estimate whether it is an overload signal or not, and convert analog variables into digital ones so that they are compatible with the back-end digital circuit for further processing. The system will also restrict certain vehicles that are overweight, by taking image of the car brand, sending the alarm, and transferring the collected pressure data to remote data center for further monitoring analysis by rain-flow counting method.

  20. Analysis of DSP-based longitudinal feedback system: Trials at SPEAR and ALS

    Energy Technology Data Exchange (ETDEWEB)

    Hindi, H.; Eisen, N.; Fox, J.; Linscott, I.; Oxoby, G.; Sapozhnikov, L. [Stanford Linear Accelerator Center, Menlo Park, CA (United States); Serio, M. [Istituto Nazionale di Fisica Nucleare, Frascati (Italy). Lab. Nazionale di Frascati

    1993-04-01

    Recently a single-channel prototype of the proposed PEP-II longitudinal feedback system was successfully demonstrated at SPEAR and ALS on single-bunch beams. The phase oscillations are detected via a wide-band pick up. The feedback signal is then computed using a digital signal processor (DSP) and applied to the beam by phase modulating the rf. We analyze results in the frequency- and the time-domain and show how the closed-loop transfer functions can be obtained rigorously by proper modeling of the various components of this hybrid continuous/digital system. The technique of downsampling was used in the experiments to reduce the number of computations and allowed the use of the same digital hardware on both machines.

  1. Development of a DSP-based real-time position calculation circuit for a beta camera

    Energy Technology Data Exchange (ETDEWEB)

    Yamamoto, Seiichi E-mail: s-yama@kobe-kosen.ac.jp; Matsuda, Tadashige; Kanno, Iwao

    2000-03-01

    A digital signal processor (DSP)-based position calculation circuit was developed and tested for a beta camera. The previous position calculation circuit which employed flash analog-to-digital (A-D) converters for A-D conversion and ratio calculation produced significant line artifacts in the image due to the differential non-linearity of the A-D converters. The new position calculation circuit uses four A-D converters for A-D conversion of the analog signals from the position sensitive photomultiplier tube (PSPMT). The DSP reads the A-D signals and calculates the ratio of X{sub a}/(X{sub a}+X{sub b}) and Y{sub a}/(Y{sub a}+Y{sub b}) on an event-by-event basis. The DSP also magnifies the image to fit the useful field of view (FOV) and rejects the events out of the FOV. The line artifacts in the image were almost eliminated.

  2. Hamming Weight Counters and Comparators based on Embedded DSP Blocks for Implementation in FPGA

    Directory of Open Access Journals (Sweden)

    SKLYAROV, V.

    2014-05-01

    Full Text Available This paper is dedicated to the design, implementation and evaluation of fast FPGA-based circuits that compute Hamming weights for binary vectors and compare the results with fixed thresholds and variable bounds. It is shown that digital signal processing (DSP slices that are widely available in contemporary FPGAs may be used efficiently and they frequently provide the fastest and least resource consuming solutions. A thorough analysis and comparison of these with the best known alternatives both in hardware and in software is presented. The results are supported by numerous experiments in recent prototyping boards. A fully synthesizable hardware description language (VHDL specification for one of the proposed core components is given that is ready to be synthesized, implemented, tested and compared in any FPGA that contains embedded DSP48E1 slices (or alternatively DSP48A1 slices from previous generations. Finally, the results of comparisons are provided that include discussions of designs in an ARM processor combined with reconfigurable logic for very long vectors.

  3. Efficient RTL-based code generation for specified DSP C-compiler

    Science.gov (United States)

    Pan, Qiaohai; Liu, Peng; Shi, Ce; Yao, Qingdong; Zhu, Shaobo; Yan, Li; Zhou, Ying; Huang, Weibing

    2001-12-01

    A C-compiler is a basic tool for most embedded systems programmers. It is the tool by which the ideas and algorithms in your application (expressed as C source code) are transformed into machine code executable by the target processor. Our research was to develop an optimizing C-compiler for a specified 16-bit DSP. As one of the most important part in the C-compiler, Code Generation's efficiency and performance directly affect to the resultant target assembly code. Thus, in order to improve the performance of the C-compiler, we constructed an efficient code generation based on RTL, an intermediate language used in GNU CC. The code generation accepts RTL as main input, takes good advantage of features specific to RTL and specified DSP's architecture, and generates compact assembly code of the specified DSP. In this paper, firstly, the features of RTL will be briefly introduced. Then, the basic principle of constructing the code generation will be presented in detail. According to the basic principle, this paper will discuss the architecture of the code generation, including: syntax tree construction / reconstruction, basic RTL instruction extraction, behavior description at RTL level, and instruction description at assembly level. The optimization strategies used in the code generation for generating compact assembly code will also be given in this paper. Finally, we will achieve the conclusion that the C-compiler using this special code generation achieved high efficiency we expected.

  4. DSP controlled power converter

    OpenAIRE

    Chan, CH; Pong, MH

    1995-01-01

    A digital controller is designed and implemented by a Digital Signal Processor (DSP) to replace the Pulse Width Modulator (PWM) and error amplifier compensation network in a two wheeler forward converter. The DSP controller is designed in three approaches: a) Discretization of analog controller - the design is based on the transfer function of the error amplifier compensation network. b) Digital PID controller design - the design is based on the general form of the pulse transfer function of ...

  5. DSP Architecture Design Essentials

    CERN Document Server

    Marković, Dejan

    2012-01-01

    In DSP Architecture Design Essentials, authors Dejan Marković and Robert W. Brodersen cover a key subject for the successful realization of DSP algorithms for communications, multimedia, and healthcare applications. The book addresses the need for DSP architecture design that maps advanced DSP algorithms to hardware in the most power- and area-efficient way. The key feature of this text is a design methodology based on a high-level design model that leads to hardware implementation with minimum power and area. The methodology includes algorithm-level considerations such as automated word-length reduction and intrinsic data properties that can be leveraged to reduce hardware complexity. From a high-level data-flow graph model, an architecture exploration methodology based on linear programming is used to create an array of architectural solutions tailored to the underlying hardware technology. The book is supplemented with online material: bibliography, design examples, CAD tutorials and custom software.

  6. Real-time co-registered ultrasound and photoacoustic imaging system based on FPGA and DSP architecture

    Science.gov (United States)

    Alqasemi, Umar; Li, Hai; Aguirre, Andres; Zhu, Quing

    2011-03-01

    Co-registering ultrasound (US) and photoacoustic (PA) imaging is a logical extension to conventional ultrasound because both modalities provide complementary information of tumor morphology, tumor vasculature and hypoxia for cancer detection and characterization. In addition, both modalities are capable of providing real-time images for clinical applications. In this paper, a Field Programmable Gate Array (FPGA) and Digital Signal Processor (DSP) module-based real-time US/PA imaging system is presented. The system provides real-time US/PA data acquisition and image display for up to 5 fps* using the currently implemented DSP board. It can be upgraded to 15 fps, which is the maximum pulse repetition rate of the used laser, by implementing an advanced DSP module. Additionally, the photoacoustic RF data for each frame is saved for further off-line processing. The system frontend consists of eight 16-channel modules made of commercial and customized circuits. Each 16-channel module consists of two commercial 8-channel receiving circuitry boards and one FPGA board from Analog Devices. Each receiving board contains an IC† that combines. 8-channel low-noise amplifiers, variable-gain amplifiers, anti-aliasing filters, and ADC's‡ in a single chip with sampling frequency of 40MHz. The FPGA board captures the LVDSξ Double Data Rate (DDR) digital output of the receiving board and performs data conditioning and subbeamforming. A customized 16-channel transmission circuitry is connected to the two receiving boards for US pulseecho (PE) mode data acquisition. A DSP module uses External Memory Interface (EMIF) to interface with the eight 16-channel modules through a customized adaptor board. The DSP transfers either sub-beamformed data (US pulse-echo mode or PAI imaging mode) or raw data from FPGA boards to its DDR-2 memory through the EMIF link, then it performs additional processing, after that, it transfer the data to the PC** for further image processing. The PC code

  7. DSP and FPGA Based Bunch Current Signal Processing

    CERN Document Server

    Naylor, G A

    2001-01-01

    The current in electron storage rings used as synchrotron light sources must be measured to a very high precision in order to determine the stored beam lifetime. This is especially so in high-energy machines in which the lifetime may be very high. Parametric current transformers (PCT) have traditionally been used to measure the DC or average current in the machine, which offer a very high resolution. Unfortunately these do not allow the different components of a complex filling pattern to be measured separately. A hybrid filling mode delivered at the ESRF consists of one third of the ring filled with bunches with a single highly populated bunch in the middle of the two-thirds gap. The lifetime of these two components may be very different. Similarly the two components are injected separately and can be monitored separately using a fast current transformer (FCT) or an integrating current transformer (ICT). The signals from these devices can be analysed using high speed analogue to digital converters operating ...

  8. Dsp-based Robust Nonlinear Speed Control of PM Synchronous Motor

    Energy Technology Data Exchange (ETDEWEB)

    Baik, I.C.; Kim, K.H.; Youn, M.J. [Korea Advanced Institute of Science and Technology, Taejon (Korea, Republic of)

    1998-02-01

    A DSP-based robust nonlinear speed control of a permanent magnet synchronous motor(PMSM) is presented. A quasi-linearized and decoupled model including the influence of parameter variations and speed measurement error on the nonlinear speed control of a PMSM is derived. Based on this model, a boundary layer integral sliding mode controller to improve the robustness and performance of the nonlinear speed control of a PMSM is designed and compared with the conventional controller. To show the validity of the proposed control scheme, simulations and experimental works are carried out and compared with the conventional control scheme. (author). 17 refs., 10 figs.

  9. Chattering Suppression for DSP Based Sliding Mode Current Control of PM DC Drives

    DEFF Research Database (Denmark)

    Dal, Mehmet; Teodorescu, Remus

    2009-01-01

    This paper investigates several chattering suppression methods for DSP based implementation of sliding mode control (SMC). It concentrates on the ‘equivalent-control-dependent' and ‘state-dependent' gain adjustment methods proposed in recent theoretical studies, and tests the effectiveness...... performed separately, and so various combinations of these methods are tested to find the best solution for chattering elimination. Discontinuous control signal averaging, which is a common chattering reduction technique, is made possible while the system is online by the use of a tunable low-pass filter...

  10. DSP Based Vector Control of Five-Phase Induction Using Fuzzy Logic Control

    Directory of Open Access Journals (Sweden)

    Zakaria Mohamed Salem

    2012-03-01

    Full Text Available Abstract - This paper proposes an indirect field oriented controller for five-phase induction motor drives. The controller is based on fuzzy logic control technique. Simulation is carried out by using the Matlab/Simulink package. A complete control system experimentally implemented using digital signal processing (DSP board. The performance of the proposed system is investigated at different operating conditions. The proposed controller is robust and suitable to high performance five-phase induction motor drives. Simulation and experimental results validate the proposed approaches.

  11. A Low Cost Design Solution - DSP Based Active Power Factor Corrector for SMPS/ UPS( Single Phase

    Directory of Open Access Journals (Sweden)

    Samia P. Pitchai

    2006-01-01

    Full Text Available As per international agency regulation (IEC 1000-3-2/EN 61000-3-2 and market expectation, it is important to reduce current harmonics in the AC line current drawn by SMPS/ UPS connected to AC Mains as source and also it is desired by the user to deliver maximum power output by achieving unity power factor. To achieve the above objectives in SMPS/ UPS, APFC is required to be implemented as front end power interface between SMPS/UPS and AC Mains source. This study explores low cost design solution - DSP based APFC for Industry involved in manufacturing/supply of SMPS/UPS.

  12. Prototype of a Dsp-Based Instrument for In-Service Wireless Transmitter Power Measurement

    Directory of Open Access Journals (Sweden)

    Angrisani Leopoldo

    2014-12-01

    Full Text Available A prototype of a DSP-based instrument for in-service transmitter power measurements is presented. The instrument implements a signal-selective algorithm for power measurements that is suitable for use in wireless environments, where possible uncontrolled interfering sources are present in the radio channel and are overlapped to the signal emitted by the transmitter under test, possibly in both time and frequency domain. The measurement method exploits the principles of cyclic spectral analysis, which are briefly recalled in the paper. Potentialities, as well as limitations of the prototype use are discussed, and the results of experiments with both modulated and unmodulated interfering sources are presented.

  13. Logic Foundry: Rapid Prototyping for FPGA-Based DSP Systems

    Directory of Open Access Journals (Sweden)

    Bhattacharyya Shuvra S

    2003-01-01

    Full Text Available We introduce the Logic Foundry, a system for the rapid creation and integration of FPGA-based digital signal processing systems. Recognizing that some of the greatest challenges in creating FPGA-based systems occur in the integration of the various components, we have proposed a system that targets the following four areas of integration: design flow integration, component integration, platform integration, and software integration. Using the Logic Foundry, a system can be easily specified, and then automatically constructed and integrated with system level software.

  14. [Study for phagaquosonogram acquisition module based on DSP].

    Science.gov (United States)

    Lu, Qiang; Guo, Yong-Xin; Zhang, Guang-Yu; Cui, Dong; Wang, Shi-Gang; Jiao, Qing

    2009-07-01

    In this paper, a phagaquosonogram acquisition, a module with TMS320C6713 as a core, and USB as communicating pattern is introduced based on VC++6.0. The structure of the module, hardware configuration, software design and the experiment of the real phagaquosonogram signal collection are presented. It is shown that the module can extract human phagaquosonogram signal reliably and availably.

  15. [Development of a portable dynamic state ECG based on DSP].

    Science.gov (United States)

    Song, Li; Meng, Qing-jian; Zhang, Guang-yu; Cao, Wei-fang

    2009-11-01

    The Portable dynamic state electrocardiogram collecting system is introduced by using TMS302VC5402, TLC320AD50C, liquid crystal display model, and so on. This dissertation describes the work principle of the system and uses the united algorithm based on wavelet to identify and locate the ECG characteristic waves. This system has as follows of advantages: big memory, low noise,high common mode rejection ratio, the low power consume,the long record time etc.

  16. The Development of a Portable ECG Monitor Based on DSP

    Science.gov (United States)

    Nan, CHI Jian; Tao, YAN Yan; Meng Chen, LIU; Li, YANG

    With the advent of global information, researches of Smart Home system are in the ascendant, the ECG real-time detection, and wireless transmission of ECG become more useful. In order to achieve the purpose we developed a portable ECG monitor which achieves the purpose of cardiac disease remote monitoring, and will be used in the physical and psychological disease surveillance in smart home system, we developed this portable ECG Monitor, based on the analysis of existing ECG Monitor, using TMS320F2812 as the core controller, which complete the signal collection, storage, processing, waveform display and transmission.

  17. A DSP-based controller for a linear actuator system with sub-angstrom resolution and 15-millimeter travel range

    Energy Technology Data Exchange (ETDEWEB)

    Smolyanitskiy, A.; Shu, D.; Wong, T.; Experimental Facilities Division (APS); IIT

    2005-01-01

    We have designed and tested a new digital signal processor (DSP)-based closed-loop feedback controller for a linear actuator system with sub-angstrom resolution and 15-mm travel range. The linear actuator system consists of a laser Doppler encoder with multiple-reflection optics [1], a high-stiffness weak-link mechanism with high driving sensitivity and stability [2], and a Texas Instruments TMS320C40 DSP-based controller for high-performance closed-loop feedback control. In this paper, we discuss the DSP-based controller design, as well as recent test results yielding step sizes below 50 picometers obtained with the atomic force microprobe setup.

  18. New Intellectual Economized Technique on Electricity Based on DSP

    Institute of Scientific and Technical Information of China (English)

    Chang-ming LI; Tao JI; Ying SUN

    2010-01-01

    In order to resolve the problem of the unbalanced threephase and unstable voltage,intellectual economized technique on electricity based on electromagnetic regulation and control is proposed in this paper.We choose the TMS320LF2407A as the control chip and stepper motor as the executing agency.The equipment controls the movable contact reaching to the assigned position on the magnetic coil quickly and accurately,and outputs the sine-wave voltage steadily along with the network voltage variation though the fuzzy Porpornonal Integral Derivative(PID)control algorithm of integral separation and incremental mode with setting dead area.The principle of work and the key technique on the electromagnetic regulation and control are introduced in detail in this paper.The experiment result gives a proof for all the algorithm mentioned in this paper.

  19. An opto-electronic joint detection system based on DSP aiming at early cervical cancer screening

    Science.gov (United States)

    Wang, Weiya; Jia, Mengyu; Gao, Feng; Yang, Lihong; Qu, Pengpeng; Zou, Changping; Liu, Pengxi; Zhao, Huijuan

    2015-02-01

    The cervical cancer screening at a pre-cancer stage is beneficial to reduce the mortality of women. An opto-electronic joint detection system based on DSP aiming at early cervical cancer screening is introduced in this paper. In this system, three electrodes alternately discharge to the cervical tissue and three light emitting diodes in different wavelengths alternately irradiate the cervical tissue. Then the relative optical reflectance and electrical voltage attenuation curve are obtained by optical and electrical detection, respectively. The system is based on DSP to attain the portable and cheap instrument. By adopting the relative reflectance and the voltage attenuation constant, the classification algorithm based on Support Vector Machine (SVM) discriminates abnormal cervical tissue from normal. We use particle swarm optimization to optimize the two key parameters of SVM, i.e. nuclear factor and cost factor. The clinical data were collected on 313 patients to build a clinical database of tissue responses under optical and electrical stimulations with the histopathologic examination as the gold standard. The classification result shows that the opto-electronic joint detection has higher total coincidence rate than separate optical detection or separate electrical detection. The sensitivity, specificity, and total coincidence rate increase with the increasing of sample numbers in the training set. The average total coincidence rate of the system can reach 85.1% compared with the histopathologic examination.

  20. Design and Simulation of Mathematical Models- An DSP and Digital Communication Based Approach

    Directory of Open Access Journals (Sweden)

    Miss. Shruti R. Tambakhe

    2014-04-01

    Full Text Available A methodology for implementing DSP based or communication applications on a field programmable gate arrays (FPGA using Xilinx System Generator (XSG for Matlab. The DPSK system and FFT are simulated using Matlab/ Simulink environment and System Generator, a tool from Xilinx used for FPGA design as well as implemented on Spartan 3E Starter Kit boards. We proposed the concept of simulation of mathematical model on mixed HDL-Simulink using Xilinx system generator. Many applications that are DSP based or certain communication application require mathematical modelling for their easy understanding and analysis. Due to its complexity Pure HDL is unable to simulate. Also it terms to be costly and time consuming process. The implementation of FFT algorithms that can compute fourier transform of varied signals in real time for frequency analysis of signals on FPGAs (Spartan3E. With large demand for high dynamic range for applications, floating point implementation is used as fixed point implementation becomes increasingly expensive. The DPSK model are first board behaves as a modulator and the second as a demodulator. The modulator and demodulator algorithms have been implemented on FPGA using the VHDL language on Xilinx ISE.

  1. The study of interferometer spectrometer based on DSP and linear CCD

    Science.gov (United States)

    Kang, Hua; Peng, Yuexiang; Xu, Xinchen; Xing, Xiaoqiao

    2010-11-01

    In this paper, general theory of Fourier-transform spectrometer and polarization interferometer is presented. A new design is proposed for Fourier-transform spectrometer based on polarization interferometer with Wollaston prisms and linear CCD. Firstly, measured light is changed into linear polarization light by polarization plate. And then the light can be split into ordinary and extraordinary lights by going through one Wollaston prism. At last, after going through another Wollaston prism and analyzer, interfering fringes can be formed on linear CCD behind the analyzer. The linear CCD is driven by CPLD to output amplitude of interfering fringes and synchronous signals of frames and pixels respectively. DSP is used to collect interference pattern signals from CCD and the digital data of interfering fringes are processed by using 2048-point-FFT. Finally, optical spectrum of measured light can be display on LCD connected to DSP with RS232. The spectrometer will possess the features of firmness, portability and the ability of real-time analyzing. The work will provide a convenient and significant foundation for application of more high accuracy of Fourier-transform spectrometer.

  2. Design of DSP-based high-power digital solar array simulator

    Science.gov (United States)

    Zhang, Yang; Liu, Zhilong; Tong, Weichao; Feng, Jian; Ji, Yibo

    2013-12-01

    To satisfy rigid performance specifications, a feedback control was presented for zoom optical lens plants. With the increasing of global energy consumption, research of the photovoltaic(PV) systems get more and more attention. Research of the digital high-power solar array simulator provides technical support for high-power grid-connected PV systems research.This paper introduces a design scheme of the high-power digital solar array simulator based on TMS320F28335. A DC-DC full-bridge topology was used in the system's main circuit. The switching frequency of IGBT is 25kHz.Maximum output voltage is 900V. Maximum output current is 20A. Simulator can be pre-stored solar panel IV curves.The curve is composed of 128 discrete points .When the system was running, the main circuit voltage and current values was feedback to the DSP by the voltage and current sensors in real-time. Through incremental PI,DSP control the simulator in the closed-loop control system. Experimental data show that Simulator output voltage and current follow a preset solar panels IV curve. In connection with the formation of high-power inverter, the system becomes gridconnected PV system. The inverter can find the simulator's maximum power point and the output power can be stabilized at the maximum power point (MPP).

  3. The DSP-Carrier Board Used by the LEIR Low-Level RF System User's Manual

    CERN Document Server

    Angoletta, M E

    2007-01-01

    A new digital technology to implement beam control systems was tested in the PS Booster in 2004 and 2005 and commissioned in LEIR in 2006. The technology is based upon RF custom hardware that heavily exploits Digital Signal Processors (DSPs) and Field Programmable Gate Arrays (FPGAs) processing power. This architecture is extremely flexible in that it relies on a DSP-carrier board hosting one DSP and carrying different daughtercards. The LEIR beam control system deploys three DSP-carrier boards, which inter-communicate and exchange data continuously for the implementation of the various beam control loops. This user's manual for the DSP-carrier board, release 1.0 (EDA-00990-V1), was written in 2004 and has been used by CERN and BNL developers since then. It describes the DSP-carrier board hardware, user settings and FPGA software; hints on the DSP code used with the board are also given. An additional VME board, called Rear Transition Module, is described because it acts as a DSP-carrier board extension.

  4. Design of embedded image processing system based on DSP+FPGA architecture%基于DSP+FPGA的嵌入式图像处理系统设计

    Institute of Scientific and Technical Information of China (English)

    李佩斌; 黄莹; 赵誉婷

    2014-01-01

    为满足数据量大、算法复杂度高的应用需求,使用高性能DSP完成复杂图像算法处理,FPGA作为协处理器,完成图像采集、存储和显示等功能,构建了一种高性能的嵌入式图像处理系统。DSP和FPGA通过EMIF接口实现了高速无缝互联。采用三重缓冲读写机制解决了采集和显示的异步时钟域问题及算法处理时间不确定的问题。介绍了基于BIOS和NDK开发的C6455软件流程,展示了该系统图像处理算法运行周期的统计结果。该系统运行稳定可靠,具有较高的实用价值。%To meet the application requirements of large amount of data and complex image processing,a high-performance embedded image processing system based on DSP + FPGA Architecture was established,in which high-performance DSP is used to realize complex image algorithm processing,and FPGA is adopted as a coprocessor to implement image acquisition, storage,display,etc. A high-speed seamless interconnection between DSP to FPGA is implemented through EMIF interface. The problems of asynchronous clock domain between image acquisition and display,and algorithm processing time uncertainty were solved by means of triple buffering read-write mechanism. The C6455 software flow developed on the basis of BIOS and NDK is introduced. The statistical results of the image processing algorithm execution cycles of this system have been demonstrated. This system is stable and reliable,and has high practical value.

  5. DSP with FPGAs: a Xilinx/Simulink-based course and laboratory

    Science.gov (United States)

    Meyer-Bäse, Uwe; Vera, A.; Meyer-Bäse, A.; Pattichis, M.; Perry, R.

    2008-04-01

    This is the third paper in a series that introduces a MatLab/Simulink-based design flow for FPGAs at an undergraduate curriculum level. In the first paper presented at SPIE 2006 we analyzed the design tools, while in the second paper presented at SPIE 2007 we reported on the appropriate topics for the lectures and labs. In this third paper we first give an overview based on the 12-year EDA cycle on why FPGAs have now reached a level where SOPC design is possible and why MatLab/Simulink is favored by both leaders in the FPGA field: Altera (DSP builder) and Xilinx (System Generator). We then describe the Xilinx Blackboard educational material development (EMD) that has been used in Spring 2007 and Spring 2008 to teach a Xilinx System Generator based course and laboratory.

  6. Sliding mode controller gain adaptation and chattering reduction techniques for DSP-based PM DC motor drives

    DEFF Research Database (Denmark)

    Dal, Mehmet; Teodorescu, Remus

    2011-01-01

    simulations. To demonstrate the effectiveness of each method, several experiments were performed on a DSP-based PM DC motor drive system. Then, the newly proposed combinations of these methods were implemented. The hardware implementation results are comparatively presented and discussed....

  7. Hardware design and implementation of fast DOA estimation method based on multicore DSP

    Science.gov (United States)

    Guo, Rui; Zhao, Yingxiao; Zhang, Yue; Lin, Qianqiang; Chen, Zengping

    2016-10-01

    In this paper, we present a high-speed real-time signal processing hardware platform based on multicore digital signal processor (DSP). The real-time signal processing platform shows several excellent characteristics including high performance computing, low power consumption, large-capacity data storage and high speed data transmission, which make it able to meet the constraint of real-time direction of arrival (DOA) estimation. To reduce the high computational complexity of DOA estimation algorithm, a novel real-valued MUSIC estimator is used. The algorithm is decomposed into several independent steps and the time consumption of each step is counted. Based on the statistics of the time consumption, we present a new parallel processing strategy to distribute the task of DOA estimation to different cores of the real-time signal processing hardware platform. Experimental results demonstrate that the high processing capability of the signal processing platform meets the constraint of real-time direction of arrival (DOA) estimation.

  8. Design and Implementation of a FPGA and DSP Based MIMO Radar Imaging System

    Directory of Open Access Journals (Sweden)

    Wei Wang

    2015-06-01

    Full Text Available The work presented in this paper is aimed at the implementation of a real-time multiple-input multiple-output (MIMO imaging radar used for area surveillance. In this radar, the equivalent virtual array method and time-division technique are applied to make 16 virtual elements synthesized from the MIMO antenna array. The chirp signal generater is based on a combination of direct digital synthesizer (DDS and phase locked loop (PLL. A signal conditioning circuit is used to deal with the coupling effect within the array. The signal processing platform is based on an efficient field programmable gates array (FPGA and digital signal processor (DSP pipeline where a robust beamforming imaging algorithm is running on. The radar system was evaluated through a real field experiment. Imaging capability and real-time performance shown in the results demonstrate the practical feasibility of the implementation.

  9. A design of space robot multi-target capture algorithm based on DSP

    Institute of Scientific and Technical Information of China (English)

    MA Xiao-na; HU Bing-liang; LIU Xue-bin; LIU Hui; LIU Qian-wen

    2009-01-01

    To correctly capture spatial targets from cluttered and motive celestial background, a new Multi-Target Capture algorithm was proposed, which is a comparative difference algorithm based on the combination of centroid extraction and despun registration of efficient points. Moreover, this algorithm was applied in an image processing system based on the DSP featuring high speed and high performance. The procedures of image processing are as follows: first, label efficient points in the frame and extract their centroids; second, make appropriate despun registration, according to the reference rotation angles provided by Space Robot position system; third, translate and register centroid coordinates of efficient points in reference frames and get the registration points according to the principle that there are the most same centroid coordinates of efficient points when completely registered; finally, eliminate the same background points by using comparative difference method. The result shows that this image processing system can meet the needs of the whole system.

  10. Multiphase PWM Algorithm Implementation Based on DSP+FPGA Control Platform%基于DSP+FPGA控制平台的多相PWM算法实现

    Institute of Scientific and Technical Information of China (English)

    谭光韧; 苑令华; 边茂洲; 相龙阳

    2016-01-01

    针对多相变频器生成波形路数多、注入低次谐波后计算复杂等问题,提出了一种基于DSP+FPGA控制平台的多相SPWM算法,其核心部分采用等效面积法实现波形生成,能够注入幅值可控的低次谐波。将该算法应用到6相感应电机变频调速系统中,实验结果表明了该算法的可行性和优越性,具有计算速度快、精度高、可扩展性强等优势,系统性能指标达到设计要求。%With the problems of too many waveforms of multiphase inverter and complicated calculation when considering the low harmonics and so on,presented a kind of multiphase SPWM algorithm based on DSP+FPGA control platform,the core part adopted the equivalent area method to realize the generation of waveforms,and could inject the amplitude controllable low harmonics. Applying the algorithm to the six phase induction motor variable frequency speed control system,the experiment results show the feasibility and superiority of the proposed algorithm, and the advantages of fast calculation speed,high precision and strong scalability,the system performance indicators achieve the design requirements.

  11. 一种基于DSP/BIOS的跳频控制系统设计%Design on FH Control System based on DSP/BIOS

    Institute of Scientific and Technical Information of China (English)

    谈江海; 余金澳

    2013-01-01

    跳频通信由于其优良的抗干扰特性而成为当今军事通信的重要方式,跳频同步是跳频通信系统的关键技术之一,跳频控制系统的设计在整个通信系统中占有重要的位置。介绍了一种利用GPS信号来进行跳频同步的方法,对TOD、跳频图案等进行了相关设计;并详细介绍了工程研制项目中的实现过程,主要采用基于DSP/BIOS的方法来具体实现跳频控制系统。试验表明该设计可以做到快速、有效的跳频控制,该系统也在实际应用中发挥了重要作用。%HF communication is an important way in the military communication today for its good anti-jammingability, while HF synchronization is one of the key technologies in HF communication. HF control system occupies animportant position in communication system. This paper discusses a synchronization mode with GPS signal, gives the related designs on TOD and HF pattern, and describes in detail its imple-mentation in project development. The HF control system is developed with the way based on DSP/BIOS. Experimentindicates that this design could realize quick and efficient HF control, and this system could plays an important role in the practicalapplication.

  12. Design of adaptive filter amplifier in UV communication based on DSP

    Science.gov (United States)

    Lv, Zhaoshun; Wu, Hanping; Li, Junyu

    2016-10-01

    According to the problem of the weak signal at receiving end in UV communication, we design a high gain, continuously adjustable adaptive filter amplifier. Based on proposing overall technical indicators and analyzing its working principle of the signal amplifier, we use chip LMH6629MF and two chips of AD797BN to achieve three-level cascade amplification. And apply hardware of DSP TMS320VC5509A to implement digital filtering. Design and verification by Multisim, Protel 99SE and CCS, the results show that: the amplifier can realize continuously adjustable amplification from 1000 to 10000 times without distortion. Magnification error is <=%4@1000 10000. And equivalent input noise voltage of amplification circuit is <=6 nV/ √Hz @30KHz 45KHz, and realizing function of adaptive filtering. The design provides theoretical reference and technical support for the UV weak signal processing.

  13. Measure and Control Technology Based on DSP for HighPrecision Scanning Motor

    Energy Technology Data Exchange (ETDEWEB)

    Yang, N; Yang, X Y; Wu, B; Ye, S H [State Key Lab of Precision Measuring Technology and Instruments of Tianjin University, Tianjin, 300072 (China)

    2006-10-15

    A welding seam tracking visual sensor based on laser scanning is designed to solve the problems, such as indistinct image, difficulty in processing image etc., caused by serious arc light interference during welding. This visual sensor is mainly composed of a scanning motor, a linear-array CCD, a scanning rotating mirror and a semiconductor laser. Because the sensor measurement precision relies dramatically on the rotate speed stability of the scanning motor, the crux in the sensor design is to control the rotate speed of the scanning motor. Selecting a brushless direct current motor as the scanning motor and using TMS320F2812 DSP to drive it, we adopted fuzzy algorithm to control the motor rotate speed and made the steadiness error of the rotate speed less than 0.5%, which guarantees the sensor measurement precision and is of great importance for enhancing the welding quality of the industry welding robot.

  14. The basis for design of a DSP-based coincidence spectrometer

    CERN Document Server

    Khang, Pham Dinh; Dien, Nguyen Nhi; Tuan, Pham Ngoc; Lanh, Dang; Hoa, Nguyen Duc; Son, Nguyen An

    2013-01-01

    Coincidence technique and the coincidence measurement systems have been developed and applied for over 40 years. Most of popular coincidence measurement systems were based on analog electronics techniques such as time to amplitude conversion (TAC) or logic selecting coincidence unit. The above-mentioned systems are relatively cumbersome and complicated to use. With the strong growth of digital electronics techniques and computational science, the coincidence measurement systems will be constructed simpler but more efficient with the sake of application. This article presents the design principle and signal processing of a simple two-channel coincidence system by a new technique called Digital Signal Processing (DSP) using Field Programmable Gate Arrays (FPGA) devices at Nuclear Research Institute (NRI), Dalat.

  15. [The acquisition and analysis of heart sound signals based on DSP].

    Science.gov (United States)

    Xing, Suxia; Chen, Tianhua

    2011-04-01

    Heart sound signals acquisition is the primary basis for achieving non-invasive diagnosis of coronary heart disease. In this paper, a digital signal processor (DSP)-based on miniaturized circuit of heart sound signals acquisition and analysis platform was designed to achieve the functions of filtering, collecting, processing, displaying and the communicating with PC. With the self-developed experimental platform, we collected 228 cases of heart sounds of clinical data, and processed the signals using de-noising method with wavelet transform. These experimental results indicated that the db6 wavelet has the most obvious de-noising effect among the four most commonly used wavelets, i.e., haar, db6, sym8, and coif5. One wavelet at different levels possessed different de-noising effects, with level-5 db6 decomposition obtaining the most desirable result.

  16. The basis for design and manufacture of a dsp-based coincidence spectrometer

    CERN Document Server

    Hai, N X; Dien, N N; Lanh, D; Huong, T T T; Khang, P D

    2013-01-01

    The coincidence technique and the coincidence spectroscopy have been developed and applied for over 40 years. Most of popular coincidence measurement systems were based on analog electronics techniques such as time to amplitude conversion (TAC) or logic selecting coincidence unit. The above-mentioned systems are relatively cumbersome and complicated to use. With the strong growth of digital electronics techniques and computational science, the coincidence measurement systems will be constructed simpler but more efficient with the sake of application. This article presents the design principle and signal processing of a simple two-channel coincidence system by a technique of Digital Signal Processing (DSP) using Field Programmable Gate Arrays (FPGA) devices at Nuclear Research Institute (NRI), Dalat.

  17. DSP implementation of Fuzzy based Power Quality enhancement strategy for IPOS converter fed drive

    Directory of Open Access Journals (Sweden)

    N.Radhakrishnan

    2012-03-01

    Full Text Available The paper attempts to develop a Fuzzy based Pulse Width Modulation (PWM scheme through the use of a Digital Signal Processor (DSP with a view to improve the input power factor of a drive system. It corners to exploit the merits of an inherent decision making mechanism to construct a control algorithm and there from articulate a methodology to reshape the input current wave to a sinusoidal form. The procedure forges to facilitate an increase in the fundamental component of the current through the entire operating range. The scheme, investigated using a prototype model envisages to enhance the power quality indices of the AC-DC converter fed drive system, in addition to regulating its speed

  18. Performance Analysis for EDMA Based on TIC6678Multi-core DSP

    Institute of Scientific and Technical Information of China (English)

    Yun Xu; Yimin Ouyang; Renjie Niu

    2015-01-01

    Frequent data exchange among all kinds of memories has become an inevitable phenomenon in the process of modern embeddedsoftware design. In order to improve the ability of the embedded system data's throughput and computation, most embeddeddevices introduce Enhanced Direct Memory Access (EDMA) data transfer technology. TMS320C6678 is a multi-core DSPproduced by Texas Instruments (TI). There are ten EDMA transmission controllers in the chip for configuration and datatransmissions are allowed to be performed between any two pieces of storage at the same time. This paper expounds the workingmechanism of EDMA based on multi-core DSP TMS320C6678. At the same time, multiple data sets are provided and thebottleneck of limiting data throughout is analyzed and solved.

  19. DSP based lunar sampling control system for the coiling-type sampler

    Science.gov (United States)

    Ling, Yun; Song, Aiguo; Lu, Wei

    2011-12-01

    The paper develops a control system based on DSP28334 for lunar sampling, and provides the main structure of it. The critical hardware and software design of the system are introduced in detail. The emphasis is placed on the design and realization of the vibration control of the coiling-type sampler in the process of lunar sampling. A control strategy which combines manual-control and local autonomous control is applied for the lunar sampling control. And the sampling mechanism being controlled can realizes multi-motor units working at time-sharing, which reduces the power comsumption and increases the stability of the sampling system greatly. The practical application of the control strategy used for the coiling-type sampler is verified by the finite element analysis. The experiments results show that the system works with low power consumption and high efficiency, and the proposed strategy enables greater depth and better efficiency during sampling.

  20. Design of thin-film filters for resolution improvements in filter-array based spectrometers using DSP

    Science.gov (United States)

    Lee, Woong-Bi; Kim, Cheolsun; Ju, Gun Wu; Lee, Yong Tak; Lee, Heung-No

    2016-05-01

    Miniature spectrometers have been widely developed in various academic and industrial applications such as bio-medical, chemical and environmental engineering. As a family of spectrometers, optical filter-array based spectrometers fabricated using CMOS or Nano technology provide miniaturization, superior portability and cost effectiveness. In filterarray based spectrometers, the resolution which represents the ability how closely resolve two neighboring spectra, depends on the number of filters and the characteristics of the transmission functions (TFs) of the filters. In practice, due to the small-size and low-cost fabrication, the number of filters is limited and the shape of the TF of each filter is nonideal. As a development of modern digital signal processing (DSP), the spectrometers are equipped with DSP algorithms not only to alleviate distortions due to unexpected noise or interferences among filters but also reconstruct the original signal spectrum. For a high-resolution spectrum reconstruction by the DSP, the TFs of the filters need to be sufficiently uncorrelated with each other. In this paper, we present a design of optical thin-film filters which have the uncorrelated TFs. Each filter consists of multiple layers of high- and low-refractive index materials deposited on a substrate. The proposed design helps the DSP algorithm to improve resolution with a small number of filters. We demonstrate that a resolution of 5 nm within a range from 500 nm to 1100 nm can be achieved with only 64 filters.

  1. Multi-DSP and FPGA based Multi-channel Direct IF/RF Digital receiver for atmospheric radar

    Science.gov (United States)

    Yasodha, Polisetti; Jayaraman, Achuthan; Kamaraj, Pandian; Durga rao, Meka; Thriveni, A.

    2016-07-01

    Modern phased array radars depend highly on digital signal processing (DSP) to extract the echo signal information and to accomplish reliability along with programmability and flexibility. The advent of ASIC technology has made various digital signal processing steps to be realized in one DSP chip, which can be programmed as per the application and can handle high data rates, to be used in the radar receiver to process the received signal. Further, recent days field programmable gate array (FPGA) chips, which can be re-programmed, also present an opportunity to utilize them to process the radar signal. A multi-channel direct IF/RF digital receiver (MCDRx) is developed at NARL, taking the advantage of high speed ADCs and high performance DSP chips/FPGAs, to be used for atmospheric radars working in HF/VHF bands. Multiple channels facilitate the radar t be operated in multi-receiver modes and also to obtain the wind vector with improved time resolution, without switching the antenna beam. MCDRx has six channels, implemented on a custom built digital board, which is realized using six numbers of ADCs for simultaneous processing of the six input signals, Xilinx vertex5 FPGA and Spartan6 FPGA, and two ADSPTS201 DSP chips, each of which performs one phase of processing. MCDRx unit interfaces with the data storage/display computer via two gigabit ethernet (GbE) links. One of the six channels is used for Doppler beam swinging (DBS) mode and the other five channels are used for multi-receiver mode operations, dedicatedly. Each channel has (i) ADC block, to digitize RF/IF signal, (ii) DDC block for digital down conversion of the digitized signal, (iii) decoding block to decode the phase coded signal, and (iv) coherent integration block for integrating the data preserving phase intact. ADC block consists of Analog devices make AD9467 16-bit ADCs, to digitize the input signal at 80 MSPS. The output of ADC is centered around (80 MHz - input frequency). The digitized data is fed

  2. A Versatile High-speed Image Processing System Based on DSP and CPLD

    Institute of Scientific and Technical Information of China (English)

    LUO Yan-xing; XIE Mei

    2006-01-01

    In this paper, we present an optimized design method for high-speed embedded image processing system using 32 bit floating-point Digital Signal Processor (DSP) and Complex Programmable Logic Device (CPLD). The DSP acts as the main processor of the system: executes digital image processing algorithms and operates other devices such as image sensor and CPLD. The CPLD is used to acquire images and achieve complex logic control of the whole system. Some key technologies are introduced to enhance the performance of our system. In particular, the use of DSP/BIOS tool to develop DSP applications makes our program run much more efficiently. As a result, this system can provide an excellent computing platform not only for executing complex image processing algorithms, but also for other digital signal processing or multi-channel data collection by choosing different sensors or Analog-to-Digital (A/D) converters.

  3. Performance Analysis of Code OptimizationBased on TMS320C6678 Multi-core DSP

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    In the development of modern DSP, more and more use of C/C++ as a development language has become a trend. Optimizationof C/C++ program has become an important link of the DSP software development. This article describes the structure features ofTMS320C6678 processor, illustrates the principle of efficient optimization method for C/C++, and analyzes the results.

  4. Feasibility study on a portable field pest classification system design based on DSP and 3G wireless communication technology.

    Science.gov (United States)

    Han, Ruizhen; He, Yong; Liu, Fei

    2012-01-01

    This paper presents a feasibility study on a real-time in field pest classification system design based on Blackfin DSP and 3G wireless communication technology. This prototype system is composed of remote on-line classification platform (ROCP), which uses a digital signal processor (DSP) as a core CPU, and a host control platform (HCP). The ROCP is in charge of acquiring the pest image, extracting image features and detecting the class of pest using an Artificial Neural Network (ANN) classifier. It sends the image data, which is encoded using JPEG 2000 in DSP, to the HCP through the 3G network at the same time for further identification. The image transmission and communication are accomplished using 3G technology. Our system transmits the data via a commercial base station. The system can work properly based on the effective coverage of base stations, no matter the distance from the ROCP to the HCP. In the HCP, the image data is decoded and the pest image displayed in real-time for further identification. Authentication and performance tests of the prototype system were conducted. The authentication test showed that the image data were transmitted correctly. Based on the performance test results on six classes of pests, the average accuracy is 82%. Considering the different live pests' pose and different field lighting conditions, the result is satisfactory. The proposed technique is well suited for implementation in field pest classification on-line for precision agriculture.

  5. Feasibility Study on a Portable Field Pest Classification System Design Based on DSP and 3G Wireless Communication Technology

    Directory of Open Access Journals (Sweden)

    Fei Liu

    2012-03-01

    Full Text Available This paper presents a feasibility study on a real-time in field pest classification system design based on Blackfin DSP and 3G wireless communication technology. This prototype system is composed of remote on-line classification platform (ROCP, which uses a digital signal processor (DSP as a core CPU, and a host control platform (HCP. The ROCP is in charge of acquiring the pest image, extracting image features and detecting the class of pest using an Artificial Neural Network (ANN classifier. It sends the image data, which is encoded using JPEG 2000 in DSP, to the HCP through the 3G network at the same time for further identification. The image transmission and communication are accomplished using 3G technology. Our system transmits the data via a commercial base station. The system can work properly based on the effective coverage of base stations, no matter the distance from the ROCP to the HCP. In the HCP, the image data is decoded and the pest image displayed in real-time for further identification. Authentication and performance tests of the prototype system were conducted. The authentication test showed that the image data were transmitted correctly. Based on the performance test results on six classes of pests, the average accuracy is 82%. Considering the different live pests’ pose and different field lighting conditions, the result is satisfactory. The proposed technique is well suited for implementation in field pest classification on-line for precision agriculture.

  6. ASIP Approach for Multimedia Applications Based on a Scalable VLIW DSP Architecture

    Institute of Scientific and Technical Information of China (English)

    ZHANG Yanjun; HE Hu; SHEN Zheng; SUN Yihe

    2009-01-01

    The rapid development of multimedia techniques has increased the demands on multimedia processors.This paper presents a new design method to quickly design high performance processors for new multimedia applications.In this approach,a configurable processor based on the very long instruction-set word architecture is used as the basic core for designers to easily configure new processor cores for multimedia algorithm.Specific instructions designed for multimedia applications efficiently improve the performance of the target processor.Functions not implemented in the digital signal processor (DSP) core can be easily integrated into the target processor as user-defined hardware to increase the performance.Several examples are given based on the architecture.The results show that the processor performance is enhanced approximately 4 times on the H.263 codec and that the processor outperforms both DSPs and single instruction multiple data (SIMD) multimedia extension architectures by up to 8 times when computing the 2-D-IDCT.

  7. Design of a hand-shape acquisition and recognition system based on DSP

    Science.gov (United States)

    Li, Wenwen; Liu, Fu; Gao, Lei

    2013-10-01

    In this paper, we design a hand-shape image acquisition and processing system based on DSP for solving the problem of hand-shape recognition. Acquisition configuration was designed, and the key parts (encoder, decoder, memory chip etc.) are selected. And a new method for hand-shape recognition based on wavelet moment is presented to overcome some shortage in present method for hand shape recognition. Firstly, image processing including binary processing and segment of hand silhouette are used, and then translation and scale normalization algorithms is implemented on the palms and fingers image. After that the wavelet moment characteristics of image are extracted. At last, support vector is achieved by training 100 images data in images database, 10 testing images were selected randomly to verify validity and feasibility of algorithms. Experimental results indicate that the 10 testing images are all classified correctly. The new method of extracting hand shape wavelet moment as characteristic matrix is easy to realize with characteristic of high utility and accuracy, and solve the problem of translation, rotation and scaling during the image acquisition process without positioning aids.

  8. [Development of a video image system for wireless capsule endoscopes based on DSP].

    Science.gov (United States)

    Yang, Li; Peng, Chenglin; Wu, Huafeng; Zhao, Dechun; Zhang, Jinhua

    2008-02-01

    A video image recorder to record video picture for wireless capsule endoscopes was designed. TMS320C6211 DSP of Texas Instruments Inc. is the core processor of this system. Images are periodically acquired from Composite Video Broadcast Signal (CVBS) source and scaled by video decoder (SAA7114H). Video data is transported from high speed buffer First-in First-out (FIFO) to Digital Signal Processor (DSP) under the control of Complex Programmable Logic Device (CPLD). This paper adopts JPEG algorithm for image coding, and the compressed data in DSP was stored to Compact Flash (CF) card. TMS320C6211 DSP is mainly used for image compression and data transporting. Fast Discrete Cosine Transform (DCT) algorithm and fast coefficient quantization algorithm are used to accelerate operation speed of DSP and decrease the executing code. At the same time, proper address is assigned for each memory, which has different speed;the memory structure is also optimized. In addition, this system uses plenty of Extended Direct Memory Access (EDMA) to transport and process image data, which results in stable and high performance.

  9. Perception SoC Based on an Ultrasonic Array of Sensors: Efficient DSP Core Implementation and Subsequent Experimental Results

    Directory of Open Access Journals (Sweden)

    A. Haidar

    2005-05-01

    Full Text Available We are concerned with the design, implementation, and validation of a perception SoC based on an ultrasonic array of sensors. The proposed SoC is dedicated to ultrasonic echography applications. A rapid prototyping platform is used to implement and validate the new architecture of the digital signal processing (DSP core. The proposed DSP core efficiently integrates all of the necessary ultrasonic B-mode processing modules. It includes digital beamforming, quadrature demodulation of RF signals, digital filtering, and envelope detection of the received signals. This system handles 128 scan lines and 6400 samples per scan line with a 90° angle of view span. The design uses a minimum size lookup memory to store the initial scan information. Rapid prototyping using an ARM/FPGA combination is used to validate the operation of the described system. This system offers significant advantages of portability and a rapid time to market.

  10. Simultaneous and independent multi-parameter monitoring with fault localization for DSP-based coherent communication systems.

    Science.gov (United States)

    Shen, Thomas Shun Rong; Lau, Alan Pak Tao; Yu, Changyuan

    2010-11-08

    Digital signal processing (DSP)-based coherent communications have become standard for future high-speed optical networks. Implementing DSP-based advanced algorithms for data detection requires much more detailed knowledge of the transmission link parameters, resulting in optical performance monitoring (OPM) being even more important for next generation systems. At the same time, the DSP platform also enables new strategies for OPM. In this paper, we propose the use of pilot symbols with alternating power levels and study the statistics of the received power and phase difference to simultaneously and independently monitor the carrier frequency offset between transmitter and receiver laser, laser linewidth, number of spans, fiber nonlinearity parameters as well as optical signal-to-noise ratio (OSNR) of a transmission link. Analytical predictions are verified by simulation results for systems with full chromatic dispersion (CD) compensation per span and 10% CD under-compensation per span. In addition, we show that by monitoring the changes in the statistics of the received pilot symbols during network operation, one can locate faults or OSNR degradations along a transmission link without additional monitoring equipments at intermediate nodes, which may be useful for more efficient dynamic routing and network management.

  11. 基于DSP的自动指纹识别系统%Automatic Fingerprint Identification System Based on DSP

    Institute of Scientific and Technical Information of China (English)

    2013-01-01

    According to real - time ,accuracy ,low power consumption ,small volume ,portable request of the security access control system ,this paper proposed automatic fingerprint identification system based on DSP TMS320VC5509A and fingerprint acquisition sensor MBF310 .The system uses finger-print image matching algorithm based on fingerprint ridge line difference degree .The algorithm was used in DSP TMS320VC5509A successfully ,and improved the detection accuracy . The experiments show that the system has a higher intelligent and good stability .%  针对安全访问控制系统的实时性、精确性、低功耗、体积小、便携式等要求,提出一种基于 DSP TMS320VC5509A和指纹采集传感器 MBF310的自动指纹识别系统。该系统使用的基于指纹脊线差异度的指纹图像匹配算法应用于 DSP之中,提高了检测的准确性。实验表明,整个系统具有良好的智能化和稳定性。

  12. DSP-based control of a high frequency three cell flying capacitor inverter

    Science.gov (United States)

    Flores-Fuentes, A. A.; Rossano-Díaz, I. O.; Peña-Eguiluz, R.; López-Callejas, R.; Mercado-Cabrera, A.; de la Piedad-Beneitez, A.; Barocio, S. R.; Valencia, R.

    2010-03-01

    The design, instrumentation and early operation results of a digitally controlled voltage source inverter (VSI) are described. This inverter has been structured from a three cell flying capacitor inverter (TCFCI). Two different inverter control modes - open-loop and closed-loop - are applied by a digital system based on a Texas Instrument TMS320C6713 digital signal processor (DSP) board. The VSI is able to generate AC voltage signals up to 120 V amplitudes at a maximal 6 A current, from ∼9 kHz to ∼60 kHz in ∼900 Hz steps in both controls by varying the signal period through the square-wave command strategy. The multi-cell structure of the inverter provides an output frequency nearly three times that of the TCFCI semiconductor commutation. The power output of the TCFCI can drive a high frequency step-up transformer which, in turn, is associated with a cylindrical reactor where dielectric barrier discharges (DBD) are conducted.

  13. Design and implementation of DSP based solar converter for photovoltaic systems

    Energy Technology Data Exchange (ETDEWEB)

    Caliskan, Eser [TUBITAK - MRC, Kocaeli (Turkey). Energy Inst.; Ustun, Ozgur [Istanbul Technical Univ., Maslak (Turkey). Electrical Engineering Dept.

    2012-07-01

    This study discusses the design and implementation of a DSP controlled converter for photovoltaic system that can track the maximum power point, charge and discharge the battery. In the designed system, the boost converter operates the photovoltaic panels at the maximum power point and the bi-directional battery charger charges and discharges the battery bank as demanded. All required switching and control signals for these converters provided by the high performance C2000 series DSP produced by the Texas Instruments. The current, voltage and temperature data are collected by sensors from power stages by using DSP algorithms and the control signals are generated by the embedded software. The load bus is kept at constant voltage by the bi-directional battery charger. The boost converter is controlled by MPPT algorithms and the current sharing or battery charge modes are implemented depending on the radiation value. The designed photovoltaic system performance is verified by simulation and some experiments. (orig.)

  14. Design and implementation of an early warning system in vehicle for road speed control hump based on DSP and CCD

    Science.gov (United States)

    Yang, Shuyi; Zhu, Pingyu; He, Yanfang; Wang, Le

    2011-12-01

    Road speed control humps have the effect of strengthening transportation safety by preventing traffic accidents. However, vehicles will produce strong mechanical vibrations when crossing speed control humps at high speed. These vibrations affect the passenger's comfort and cause machine parts damage. Early warning systems in vehicles for road speed control humps were designed based on DSP and CCD sensors. The system uses a CCD camera to take the picture of the road speed control humps. The image information is processed and recognised by DSP. Then the related voice and image information is given quickly and accurately after the system processes. This information will remind the driver to prepare for slowing down in good time, it makes them safe and comfortable to pass over the road speed control hump.TMS320DM642DSP early warning system in vehicles was illustrated from three aspects of the image collection module, the image discernment module and the early warning export module. TMS320C6x soft develop flow was introduced in this paper. The system has strong practicality, rapid response and well directed-viewing.

  15. DSP-Based dual-polarity mass spectrum pattern recognition for bio-detection

    Energy Technology Data Exchange (ETDEWEB)

    Riot, V; Coffee, K; Gard, E; Fergenson, D; Ramani, S; Steele, P

    2006-04-21

    The Bio-Aerosol Mass Spectrometry (BAMS) instrument analyzes single aerosol particles using a dual-polarity time-of-flight mass spectrometer recording simultaneously spectra of thirty to a hundred thousand points on each polarity. We describe here a real-time pattern recognition algorithm developed at Lawrence Livermore National Laboratory that has been implemented on a nine Digital Signal Processor (DSP) system from Signatec Incorporated. The algorithm first preprocesses independently the raw time-of-flight data through an adaptive baseline removal routine. The next step consists of a polarity dependent calibration to a mass-to-charge representation, reducing the data to about five hundred to a thousand channels per polarity. The last step is the identification step using a pattern recognition algorithm based on a library of known particle signatures including threat agents and background particles. The identification step includes integrating the two polarities for a final identification determination using a score-based rule tree. This algorithm, operating on multiple channels per-polarity and multiple polarities, is well suited for parallel real-time processing. It has been implemented on the PMP8A from Signatec Incorporated, which is a computer based board that can interface directly to the two one-Giga-Sample digitizers (PDA1000 from Signatec Incorporated) used to record the two polarities of time-of-flight data. By using optimized data separation, pipelining, and parallel processing across the nine DSPs it is possible to achieve a processing speed of up to a thousand particles per seconds, while maintaining the recognition rate observed on a non-real time implementation. This embedded system has allowed the BAMS technology to improve its throughput and therefore its sensitivity while maintaining a large dynamic range (number of channels and two polarities) thus maintaining the systems specificity for bio-detection.

  16. Design of Communication Interface between ARM and DSP Based on Dual-port RAM%基于双口RAM的ARM与DSP通信接口设计

    Institute of Scientific and Technical Information of China (English)

    操虹; 李臻; 贾洪钢

    2012-01-01

    提出了一种基于双口RAM的ARM与DSP通信接口的设计方案.该接口以ARM为主处理器、DSP为协处理器,ARM通过在Linux系统上建立的DSP任务管理线程实现DSP任务的管理和调度工作,DSP完成ARM下发的数据计算和处理工作,两者通过双口RAM交换数据.实际应用表明,该接口充分利用了两个处理器的功能特性,数据传输速度快,适用于ARM与DSP间需要进行大量数据交换的场合.%The paper proposed a design scheme of communication interface between ARM and DSP based on dual port RAM. The interface takes ARM as main processor and DSP as coprocessor. ARM is used to realize management and dispatching work of DSP tasks through tasks management thread of DSP built on Linux system, and DSP is used to realize data calculation and processing work sent by ARM. The both exchange data through dual-port RAM. The actual application showed that the interface fully uses function characteristics of the two processors with quick data transmission speed, which is suitable for situation with the need for large acounts of data exchange between ARM and DSP.

  17. 基于DSP/BIOS的数字滤波器设计与实现%Design and implementation of digital FIR filter based on DSP/BIOS

    Institute of Scientific and Technical Information of China (English)

    闫群民

    2010-01-01

    用可编程DSP芯片实现数字滤波可以通过修改滤波器的参数十分方便的改变滤波器的特性.本文以TMS320F2812数字信号处理器为核心,用DSP/BIOS来实现滤波器的算法任务,介绍了基于DSP/BIOS的滤波器开发过程,在DSK2812平台上实现了数字滤波器的功能,同时本文方法可推广用于需要进行数字信号处理的多任务软件开发.

  18. Design and implementation of FIR digital filter based on DSP/BIOS%基于DSP/BIOS的FIR数字滤波器设计与实现

    Institute of Scientific and Technical Information of China (English)

    张凯; 皮之军; 张树团; 李静

    2009-01-01

    用可编程DSP器件实现数字滤波,通过修改滤波器参数可方便地改变滤波器的特性.以TMS320F2812数字信号处理器为核心,将滤波器算法作为DSP/BIOS的任务来实现,可方便地实现多任务系统.详细介绍一种基于DSP/BIOS的软件开发过程,并在DSK2812平台上实现数字滤波器的开发实例,对需进行数字信号处理的多任务软件开发具有一定的参考价值.

  19. 基于 DSP 和 FPGA 的载波移相脉冲生成方法%A carrier phase-shift pulse generating method based on DSP and FPGA

    Institute of Scientific and Technical Information of China (English)

    杨国润; 肖飞; 范学鑫; 谢桢; 王瑞田

    2015-01-01

    在研究了三电平全桥变流器工作原理和载波移相原理的基础上,设计生成了基于数字信号处理器(DSP)和现场可编程门阵列(FPGA)的载波移相 PWM 脉冲,用于驱动变流器工作。重点介绍了由 DSP 和FPGA 生成载波移相 PWM 脉冲的基本原理、系统构成及实现方法,其核心思想是 FPGA 通过数据地址总线接收 DSP 输出的移相角与 FPGA 内部生成的三角波进行二逻辑比较,从而产生移相角可变的 PWM 脉冲,以满足变流器全工况范围实时控制的需要。通过优化设计,使 DSP 和 FPGA 各自的优势得以有效利用。仿真分析表明:该方法计算速度快、控制精度高,同时具有扩展性好、可靠性高等优点。实验结果与仿真结果吻合,验证了该方法的上述优点。%Based on DSP and FPGA,a carrier phase-shift PWM generator is designed for driving a three-level full-bridge converter according to the operating principle of the three-level full-bridge con-verter and the principle of carrier phase-shift PWM.The description focuses on the basic principle, system configuration and operation of the proposed generator.The core idea is that FPGA receives the carrier shift phase from an external DSP through the data and address bus and then compares it with the triangular waves generated in FPGA logically so as to produce phase-adjustable PWM waveforms to meet the real-time control need of the proposed converter in all conditions.Through optimizing the design,advantages of DSP and FPGA are effectively used.This method has advantages of fast calcu-lating speed,high control precision,strong expansibility and high reliability.Experiments and simu-lations prove the method to be feasible and effective.

  20. 基于DSP6678实现多任务以太网络数据传输%Implementation of multi task ethernet data transmission based on DSP6678

    Institute of Scientific and Technical Information of China (English)

    王谦; 田欢

    2016-01-01

    The paper realizes the multi process Ethernet transceiver function based on the TMS320C6678 DSP and SYS/BIOS system.This paper firstly introduces the characteristics and architecture of TMS320C6678, and the software environment for network development: V5 SYS/BIOS, CCS 6 and NDK, and ifnally focuses on the implementation method of multi task Ethernet data transmission.%文章基于DSP TMS320C6678和SYS/BIOS系统实现多进程以太网络收发功能。文章首先介绍了TMS320C6678的特性和架构,实现网络开发所需要的软件环境:CCS V5,SYS/BIOS 6和NDK,最后重点介绍多任务以太网数据传输的实现方法。

  1. 一种基于DSP+FPGA架构的InSAR实时信号处理平台设计%Design of InSAR Real-time Signal Processing Platform Based on DSP+FPGA

    Institute of Scientific and Technical Information of China (English)

    王光; 索志勇

    2015-01-01

    本文设计了一款高性能多核InSAR实时信号处理平台,包括雷达回波数据采集、InSAR 实时信号处理和1553B 总线通信.该设计采用TI 公司的最新一代多核DSP 旗舰产品TMS320C6678以及ALTERA公司的Stratix IV GX系列FPGA芯片EP4SGX230,构建了基于DSP + FPGA架构的InSAR实时信号处理平台.经仿真验证,该InSAR实时信号处理平台的运算性能和数据传输能力能够满足InSAR实时处理的要求.%A multi-core InSAR real-time signal processing platform with high performance is developed, which realizes the data acquisition of radar echo, InSAR real-time processing and 1553B bus communication. The radar signal processing platform is based on DSP+FPGA architecture, with the TI's latest high performance multi-core DSP processor TMS320C6678 and ALTERA's Stratix Ⅳ GX series FPGA chip EP4SGX230. It is proved that the processing performance and data transmission capabilities of the real-time signal processing platform InSAR can fully meet the requirements of real-time processing InSAR.

  2. Design of DSP-based Holter System%基于DSP的Holter系统的设计

    Institute of Scientific and Technical Information of China (English)

    曹玉珍; 印震峰

    2001-01-01

    本课题研究了DSP在Holter系统中的应用。主要讨论了基于数字信号处理器(DSP)的Holter系统的具体设计。着重介绍了TMS320F206与MAX147的接口电路及同步采样串口操作,并在最后给出了采样源程序。

  3. High performance 3D adaptive filtering for DSP based portable medical imaging systems

    Science.gov (United States)

    Bockenbach, Olivier; Ali, Murtaza; Wainwright, Ian; Nadeski, Mark

    2015-03-01

    Portable medical imaging devices have proven valuable for emergency medical services both in the field and hospital environments and are becoming more prevalent in clinical settings where the use of larger imaging machines is impractical. Despite their constraints on power, size and cost, portable imaging devices must still deliver high quality images. 3D adaptive filtering is one of the most advanced techniques aimed at noise reduction and feature enhancement, but is computationally very demanding and hence often cannot be run with sufficient performance on a portable platform. In recent years, advanced multicore digital signal processors (DSP) have been developed that attain high processing performance while maintaining low levels of power dissipation. These processors enable the implementation of complex algorithms on a portable platform. In this study, the performance of a 3D adaptive filtering algorithm on a DSP is investigated. The performance is assessed by filtering a volume of size 512x256x128 voxels sampled at a pace of 10 MVoxels/sec with an Ultrasound 3D probe. Relative performance and power is addressed between a reference PC (Quad Core CPU) and a TMS320C6678 DSP from Texas Instruments.

  4. Design And Implementation of Dsp-Based Intelligent Controller For Automobile Braking System

    Directory of Open Access Journals (Sweden)

    S.N. Sidek and M.J.E. Salami

    2012-08-01

    Full Text Available An intelligent braking system has great potential applications especially, in developed countries where research on smart vehicle and intelligent highways are receiving ample attention. The system when integrated with other subsystems like automatic traction control, intelligent throttle, and auto cruise systems, etc will result in smart vehicle maneuver. The driver at the end of the day will become the passenger, safety accorded the highest priority and the journey optimized in term of time duration, cost, efficiency and comfortability. The impact of such design and development will cater for the need of contemporary society that aspires to a quality drive as well as to accommodate the advancement of technology especially in the area of smart sensors and actuators.  The emergence of digital signal processor enhances the capacity and features of universal microcontroller.  This paper introduces the use of TI DSP, TMS320LF2407 as an engine of the system. The overall system is designed so that the value of inter-vehicle distance from infrared laser sensor and speed of follower car from speedometer are fed into the DSP for processing, resulting in the DSP issuing commands to the actuator to function appropriately.Key words:  Smart Vehicle, Digital Signal Processor, Fuzzy Controller, and Infra Red Laser Sensor

  5. A PCM Telemetry Coder Based on DSP%基于数字信号处理的脉冲编码器

    Institute of Scientific and Technical Information of China (English)

    马木青; 胡淑巧; 白瑞青; 郑少超

    2015-01-01

    Aiming at the problem of too large size and too many pins of traditional telemetry coder,a PCM te-lemetry coder based on DSP was introduced in this article.This PCM telemetry coder used DSP chip instead of FPGA and microcontroller as the main CPU which accomplish two functions including digital signal processing and telemetry coding in a single DSP.This telemetry coder would minimize the size of electronics system of weaponry.The result of simulation experiment showed that,under the conditions requested by the trajectory correction weaponry,the DSP chip could code as asked form a complete PCM data steam,and accomplished the telemetry coding work.%针对传统编码器封装后体积较大、引脚较多的问题,本文提出了基于数字信号处理的脉冲编码器。该编码器采用 DSP 芯片代替单片机、FPGA 作为处理器,在同一块 DSP 芯片上实现数字信号处理和遥测编码的双重功能,减小武器弹药的电子系统体积,节省了弹药内部空间。仿真实验结果表明:在弹道修正引信遥测所需要的条件下,DSP 芯片能按照编码程序进行编码,形成完整的 PCM 遥测信号码流,实现 PCM 遥测编码功能。

  6. A novel arc welding inverter with unit power factor based on DSP control

    Institute of Scientific and Technical Information of China (English)

    Chen Shujun; Zeng Hua; Du Li; Yin Shuyan; Chen Yonggang

    2006-01-01

    A novel inverter power source is developed characterized with constant output current and unit power factor input.Digital signal processor (DSP) is used to realize power factor correction and control of back-stage inverter bridge of the arc welding inverter. The fore-stage adopts double closed loop proportion and integration (PI) rectifier technique and the backstage adopts digital pulse width modulation (PWM) technique. Simulated waves can be obtained in Matlab/Simulink and validated by experiments. Experiments of the prototype showed that the total harmonic distortion (THD) can be controlled within 10% and the power factor is approximate to 1.

  7. DSP Based PMD Emulators for Built-in Testing of Coherent Optical Receivers

    CERN Document Server

    Mahmutoglu, A Gokcen; Demir, Alper

    2012-01-01

    We propose discrete-time polarization mode dispersion (PMD) models that are compatible with the emerging coherent receiver techniques, and statistical sampling schemes for the model parameters. These models use multiple-input multiple-output (MIMO) finite impulse response (FIR) filters that are lossless and therefore lend themselves as perfect candidates for emulation of fiber channels suffering from PMD without polarization dependent loss (PDL). The concatenated composition of these filters resembles the continuous time lumped model of PMD channels and offers a flexible emulator and compensator structure in terms of computational complexity which constitutes the main bottleneck for real-time DSP applications.

  8. High Performance Control of Induction Motor for Wire Drawing Machine Based on DSP

    Energy Technology Data Exchange (ETDEWEB)

    Ahn, H.G.; Park, S.G.; Jin, S.O. [Changwon National University (Korea, Republic of); Kwon, Y.J. [IMI Engineering Co. (Korea, Republic of)

    1997-04-01

    This paper describes a high performance fully digital implementation of 15 Kw Induction Motor servo system for WDM(Wire Drawing Machine). On the basis of vector control principle, the system is controlled by a DSP(TMS320C31) and 18254 timer. Space vector modulation is used as the inverter switching strategy. The system is capable to improve the performance on the four quadrant operation for back-pull tension control. The proposed control scheme is verified by laboratory experiment in terms of control action, dynamic response and robustness. (author). 4 refs., 8 figs.

  9. Real-time vessel image enhancement system with forward and backward diffusion based on DSP

    Science.gov (United States)

    Zhang, Zhao; Wang, An; Sun, Jian-Zhao; Xia, Ying-Wei; Zhang, Long; Liu, Yong

    2016-10-01

    In order to help medical personnel to make accurate clinical judgment, we built a DSP real-time image enhancement system to enhance and sharpening the hand vein distribution image. First, we use 760 nm and 960 nm mixed near-infrared light as the light source to decrease the skin scattering and absorption of the incident light, and gain a distinct original image. Then, we analyzed the vascular model in the multi-scale method, and using the vascular response function to take the place of gradient in diffusion equation, constructed the Forward And Backward Diffusion (FABD) coefficients. Then, we realized it in the DM642 DSP hardware platform; finally, the proposed enhancement algorithms implemented on the hardware platform, and compared with anisotropic diffusion algorithm and forward and backward diffusion algorithm. The results showed that, the proposed system to enhance the images standard deviation than the original increased by 11.4971, and increased by 2.2530 and 1.1500 than the anisotropic diffusion algorithm and forward and backward diffusion algorithm respectively. The proposed system's processing time was 28.0ms, and met real time requirements. The system was stable, reliable and met the medical needs.

  10. DSP-based Robust Nonlinear Speed Control of PM Synchronous Motor Using Adaptive and Sliding Mode Control Techniques

    Energy Technology Data Exchange (ETDEWEB)

    Baik, I.C.; Kim, K.H.; Cho, K.Y.; Youn, M.J. [Korea Advanced Institute of Science and Technology, Taejon (Korea, Republic of)

    1998-04-01

    A DSP-based robust nonlinear speed control of a permanent magnet synchronous motor (PMSM) which is robust to unknown parameter variations and speed measurement error is presented. The model reference adaptive system (MRAS) based adaptation mechanisms for the estimation of slowly varying parameters are derived using the Lyapunov stability theory. For the disturbances or quickly varying parameters, a quasi-linearized and decoupled model including the influence of parameter variations and speed measurement error on the nonlinear speed control of a PMSM is derived. Based on this model, a boundary layer integral sliding mode controller to improve the robustness and performance of the nonlinear speed control of a PMSM is designed and compared with the conventional controller. To show the validity of the proposed control scheme, simulations and experimental works are carried out and compared with the conventional control scheme. (author). 19 refs., 14 figs., 6 tabs.

  11. Development of a system based in a digital signal processor (DSP) for a simulator of power regulation in a reactor: first stage; Desarrollo de un sistema basado en un DSP para un simulador de regulacion de potencia en un reactor: 1. etapa

    Energy Technology Data Exchange (ETDEWEB)

    Benitez R, J.S.; Perez C, B. [Instituto Nacional de Investigaciones Nucleares, Km. 36.5 Carretera Mexico-Toluca, Municipio de Ocoyoacac, 52045 Estado de Mexico (Mexico)

    2002-07-01

    The first stage of the development of a digital system based on a DSP is presented which forms part of an hybrid simulator for the power regulation in am model of the punctual kinetics of a TRIGA reactor type. The DSP performs the regulation, using a Mandami type algorithm of diffuse control. In the algorithm, the universe of the output variable is discretized for performing in an unique stage the aggregation functions and dis-diffusization. (Author)

  12. Optimized Speech Compression Algorithm Based on Wavelets Techniques and its Real Time Implementation on DSP

    Directory of Open Access Journals (Sweden)

    Noureddine Aloui

    2015-02-01

    Full Text Available This paper presents an optimized speech compression algorithm using discrete wavelet transform, and its real time implementation on fixed-point digital signal processor (DSP. The optimized speech compression algorithm presents the advantages to ensure low complexity, low bit rate and achieve high speech coding efficiency, and this by adding a voice activity detector (VAD module before the application of the discrete wavelet transform. The VAD module avoids the computation of the discrete wavelet coefficients during the inactive voice signal. In addition, a real-time implementation of the optimized speech compression algorithm is performed using fixed-point processor. The optimized and the original algorithms are evaluated and compared in terms of CPU time (sec, Cycle count (MCPS, Memory consumption (Ko, Compression Ratio (CR, Signal to Noise Ratio (SNR, Peak Signal to Noise Ratio (PSNR and Normalized Root Mean Square Error (NRMSE.

  13. Research of real-time wavefront reconstruction and control based on multi-core DSP

    Science.gov (United States)

    Wang, Zhui; Zhou, Luchun; Li, Mei; Zhang, Haotian

    2014-09-01

    In an Adaptive Optics system, the Real Time Processor is as important as the human brain. Processing latency is a key index of Real Time Proceesors . In this paper, we propose a new processing method that significantly reduce the processing latency, which combined the design idea of multi-core parallel processing on space and time. In addition, by comparing the operating speed of CPU and the I/O speed of memory, we propose a reasonable memory allocation scheme. The experimental results show that the processing latency is 59.7us per frame using multi-core DSP TMS320C6678 as processing platform. The experiment is conducted on a system with 968 sub-apertures and 913 actuators.

  14. Multi-Core DSP Based Parallel Architecture for FMCW SAR Real-Time Imaging

    Directory of Open Access Journals (Sweden)

    C. F. Gu

    2015-12-01

    Full Text Available This paper presents an efficient parallel processing architecture using multi-core Digital Signal Processor (DSP to improve the capability of real-time imaging for Frequency Modulated Continuous Wave Synthetic Aperture Radar (FMCW SAR. With the application of the proposed processing architecture, the imaging algorithm is modularized, and each module is efficiently realized by the proposed processing architecture. In each module, the data processing of different cores is executed in parallel, also the data transmission and data processing of each core are synchronously carried out, so that the processing time for SAR imaging is reduced significantly. Specifically, the time of corner turning operation, which is very time-consuming, is ignored under computationally intensive case. The proposed parallel architecture is applied to a compact Ku-band FMCW SAR prototype to achieve real-time imageries with 34 cm x 51 cm (range x azimuth resolution.

  15. Control electronic platform based on floating-point DSP and FPGA for a NPC multilevel back-to-back converter

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez, Francisco J.; Cobreces, Santiago; Bueno, Emilio J.; Hernandez, Alvaro; Mateos, Raul; Espinosa, Felipe [Department of Electronics, University of Alcala, Alcala de Henares, Madrid (Spain)

    2008-09-15

    Modern energy concepts as Distributed Power Generation are changing the appearance of electric distribution and transmission and challenging power electronics researchers, which try to develop new solutions of electronic controllers. The aim is to enable the implementation of new and more complex control algorithms to verify the last standards related to the grid energy quality for new power converters, and, also, for equipments which nowadays are operating. This paper presents the design, implementation and test of a novel real-time controller for a Neutral Point Clamped (NPC) (three-level) multilevel converter based on a floating-point Digital Signal Processor (DSP) and on a Field-Programmable Gate Array (FPGA), by operating in a cooperative way. Although the proposed system can be readily applied to any power electronic application, in this work, it is focused on the next system: a 150 kVA back-to-back three-level NPC Voltage Source Converter (VSC) for wind power applications. (author)

  16. 基于DSP的有源噪声控制系统设计%Active Noise Control Based on DSP

    Institute of Scientific and Technical Information of China (English)

    马永炜; 缑新科; 杜先君; 任崇玉

    2012-01-01

    The feed-forwaid adaptive active noise control (AANC) system is presented. First, the hardware project of the system is brought forward by selecting TMS320C5509 DSP as the controller. Second, using the mixed language, the active noise real-time control system is realized, based on the FXLMS algorithm. It's proved that a good noise cancellation is achieved by the experiment%基于有源噪声控制算法,设计出一种有源噪声控制器.以TMS320C5509为核心,给出了系统的硬件解决方案,并利用混合编程在硬件系统上实现了基于LMS算法的有源噪声实时控制.实验结果表明,系统取得了良好的降噪效果.

  17. The Research of a Spread Spectrum Communication Receiving System based on DSP%基于DSP的扩频通信接收系统的研究

    Institute of Scientific and Technical Information of China (English)

    姚新敏

    2014-01-01

    DSP considerable progress has been made in recent years has been widely used in communications, image processing, speech processing, medical equipment etc. In spread spectrum communications, the use of DSP chips, a development can be effective systems design, to improve the capacity and flexibility in adapting to capacity. This paper mainly study the spread spectrum communication system with high speed based on DSP, the feasibility of the system is analyzed.%数字信号处理(Digital Signal Processing,DSP)近年来得到长足发展,被广泛应用于通信、图像处理、语音处理、医疗设备等方面,在扩频通信中,利用DSP芯片进行开发,可以有效的进行系统设计,提高系统的处理能力和灵活适应能力。本课题主要是研究了基于高速DSP的扩频通信系统,对该系统的可行性进行了分析。

  18. 基于DSP2407的异步电机数字式软起动器设计%Design of Digital Soft Starter for Asynchronous Motor Based on DSP2407

    Institute of Scientific and Technical Information of China (English)

    谷志锋; 张岭; 栗彦辉; 叶秀羲

    2011-01-01

    Because of the large starting current, the bad adaptability in the load, the digital soft starter was designed base on the DSP2407 and CPLD. The digital control system, the high frequency pulse trigger technology, the insulation testing technology was introduced on detail. The software flowchart of the main function was presented. The harmonic influence was analyzed through the measurement of the voltage and the current. The digital soft starter had many advantages, such as the small size, the light weight, the controlled starting procedure, the comprehensive protection and the energy saving.%针对异步电机传统起动方式存在起动电流冲击大、负载适应能力差,设计了基于DSP2407和CPLD的数字式软起动器.详细介绍了控制系统、高频脉冲列触发、电机绝缘检测电路工作原理,并给出了控制系统的软件流程,通过实际测量电机的输入电压和电流分析了谐波影响的根源.实践证明,设计的数字式软起动器具有体积小、重量轻、起动过程可控、保护全面和节能的效果.

  19. Research and Design of Multi-axis CNC System Base on DSP%基于DSP多轴数字控制系统的研究设计

    Institute of Scientific and Technical Information of China (English)

    马亮; 张鹏杰; 曾显达; 杨雪峰

    2012-01-01

    The high-performance DSP of TMS320F2812 was combined with CPLD (Complex Programmable Logic Device) to achieve the high performance multi-axis CNC system. The system proved to be of high operating speed while being capable of re-configurable according to the field-programmable character of programmable logic device. According to the properties of DSP, CPLD and FPGA, complex control computing was Finished by DSP, and the intensive computations, including decoding, gating of memory and interface addresses, and the feedback of encoder, were completed by CPLD and FPGA. Designing based on modular was adopted in this project, which reduced the EMI (Elector Magnetic Interface) among different kinds of signals and enhanced the accuracy of this system. The experimental results indicate that the multi-axis CNC system meet requirements of real work on accuracy, real-time and stability.%本文提出了一种基于DSP TMS320F2812的多轴数控系统的设计方案,在硬件上采用了DSP+ CPLD+ FPGA的结构,以DSP作为主控制器,利用CPLD完成对DSP接口进行扩展和对存储器扩展的地址译码工作,利用FPGA辅助DSP完成编码器反馈计数功能.在CCS环境下利用C语言完成了DSP主程序的编写和调试,在ISE环境下利用Verilog HDL语言完成了CPLD和FPGA程序的编写、调试和仿真,实验结果实现了系统的可重构,更好的满足多轴数控系统对开放性的要求.

  20. A DSP controlled data acquisition system for CELSIUS

    CERN Document Server

    Bengtsson, M; Ziemann, Volker

    2000-01-01

    We describe a data acquisition system based on two 10 MHz A/D-converters, a SHARC Digital Signal Processor (DSP), and a digital synthesizer used for triggering the A/D-converters. The temporal macrostructure of the data acquisition can be determined by external triggers or by timer interrupts from the DSP. In this way up to two million samples can be stored in DSP external memory. The samples are analyzed by directly fast Fourier transforming blocks of samples. In another mode we use software-based downmixing and filtering techniques to increase the resolution and zoom in on a small frequency band. Spectra of up to 5 MHz can be manipulated and displayed as waterfall plots or spectral maps on the host computer directly. Moreover, signals of up to 70 MHz can be analyzed by undersampling techniques. We use this system to analyze Schottky spectra from electron-cooled ion beams in CELSIUS and report drag rate measurements and observations of instabilities.

  1. A DSP controlled data acquisition system for CELSIUS

    Energy Technology Data Exchange (ETDEWEB)

    Bengtsson, M.; Lofnes, T.; Ziemann, V. E-mail: ziemann@tsl.uu.se

    2000-02-21

    We describe a data acquisition system based on two 10 MHz A/D-converters, a SHARC Digital Signal Processor (DSP), and a digital synthesizer used for triggering the A/D-converters. The temporal macrostructure of the data acquisition can be determined by external triggers or by timer interrupts from the DSP. In this way up to two million samples can be stored in DSP external memory. The samples are analyzed by directly fast Fourier transforming blocks of samples. In another mode we use software-based downmixing and filtering techniques to increase the resolution and zoom in on a small frequency band. Spectra of up to 5 MHz can be manipulated and displayed as waterfall plots or spectral maps on the host computer directly. Moreover, signals of up to 70 MHz can be analyzed by undersampling techniques. We use this system to analyze Schottky spectra from electron-cooled ion beams in CELSIUS and report drag rate measurements and observations of instabilities.

  2. BLDC Motor Control System Based on DSP%基于DSP的无刷直流电动机控制系统

    Institute of Scientific and Technical Information of China (English)

    张争争; 任永德; 谢宝昌

    2001-01-01

    介绍一种基于DSP的无刷直流电动机控制系统,简述了实现该控制系统的硬件设计方案及控制策略。%This paper present a high speed digital processor (DSP) based control system for BLDC motor drive control.And describe the hardware and software design solutions for BLDC motor control system.

  3. DSP implementation of a PV system with GA-MLP-NN based MPPT controller supplying BLDC motor drive

    Energy Technology Data Exchange (ETDEWEB)

    Akkaya, R. [Department of Electrical and Electronics Engineering, Faculty of Engineering and Architecture, Selcuk University, 42031 Konya (Turkey)]. E-mail: akkaya@selcuk.edu.tr; Kulaksiz, A.A. [Department of Electrical and Electronics Engineering, Faculty of Engineering and Architecture, Selcuk University, 42031 Konya (Turkey); Aydogdu, O. [Department of Electrical and Electronics Engineering, Faculty of Engineering and Architecture, Selcuk University, 42031 Konya (Turkey)

    2007-01-15

    This paper presents a brushless dc motor drive for heating, ventilating and air conditioning fans, which is utilized as the load of a photovoltaic system with a maximum power point tracking (MPPT) controller. The MPPT controller is based on a genetic assisted, multi-layer perceptron neural network (GA-MLP-NN) structure and includes a DC-DC boost converter. Genetic assistance in the neural network is used to optimize the size of the hidden layer. Also, for training the network, a genetic assisted, Levenberg-Marquardt (GA-LM) algorithm is utilized. The off line GA-MLP-NN, trained by this hybrid algorithm, is utilized for online estimation of the voltage and current values in the maximum power point. A brushless dc (BLDC) motor drive system that incorporates a motor controller with proportional integral (PI) speed control loop is successfully implemented to operate the fans. The digital signal processor (DSP) based unit provides rapid achievement of the MPPT and current control of the BLDC motor drive. The performance results of the system are given, and experimental results are presented for a laboratory prototype of 120 W.

  4. Real-time target detection technology of large view-field infrared image based on multicore DSP parallel processing

    Science.gov (United States)

    Sun, Gang; Liu, Songlin; Wang, Weihua; Chen, Zengping

    2013-10-01

    In order to implement real-time detection of hedgehopping target in large view-field infrared (LVIR) image, the paper proposes a fast algorithm flow to extract the target region of interest (ROI). The ground building region was rejected quickly and target ROI was segmented roughly through the background classification. Then the background image containing target ROI was matched with previous frame based on a mean removal normalized product correlation (MRNPC) similarity measure function. Finally, the target motion area was extracted by inter-frame difference in time domain. According to the proposed algorithm flow, this paper designs the high-speed real-time signal processing hardware platform based on FPGA + DSP, and also presents a new parallel processing strategy that called function-level and task-level, which could parallel process LVIR image by multi-core and multi-task. Experimental results show that the algorithm can extract low altitude aero target with complex background in large view effectively, and the new design hardware platform could implement real time processing of the IR image with 50000x288 pixels per second in large view-field infrared search system (LVIRSS).

  5. Design of DSP based grid-connected inverter%基于DSP的并网逆变器的设计

    Institute of Scientific and Technical Information of China (English)

    杨树涛; 贺天章; 刘俊国

    2014-01-01

    Inverter is an inverse process of rectifier,which convert low-voltage DC to AC. In this paper,a DSP based grid-connected inverter is designed to feed back the converted AC to the power grid to realize the energy recycle. The unipolar SPWM technology is used to realize the inversion control. CAP interface of DSP is utilized to detect the frequency and phase of inverter output current. The software phase-locked technology is taken to achieve the synchronization of inverter output current phase and frequency with the grid voltage. ADC is used to collect the inverter output current and the power grid voltage informa-tion. PI closed-loop control regulation is adopted to enhance the stability of inverter output current. An experimental prototype was designed to verify the technical performance of the grid-connected inverter.%逆变是整流的逆过程,逆变器是将低压直流电转换成交流电的装置。为了能将转换后的交流电送回电网,实现能量再循环,设计了基于DSP的并网逆变器,采用倍频单极性SPWM技术实现逆变控制,并利用DSP外设CAP检测逆变器输出电流频率和相位,以软锁相技术实现逆变器输出电流的相位和频率与电网电压同步;利用DSP外设ADC采集逆变器的输出电流与电网的电压,采用PI闭环调节以增加逆变器输出电流的稳定性,最后搭建实验样机验证设计的可行性。

  6. 基于工程的DSP课程实验设计研究%Study on experiment design of DSP course based on engineering

    Institute of Scientific and Technical Information of China (English)

    裴荣; 卜雄洙; 牛国柱; 朱丽

    2011-01-01

    With respect to the characteristics of the course named Applied DSP(digital signal processor) Technology, in order to realize the thought of "Learning by Doing" establishing DSP experimental teaching system based on engineering is proposed. An experiment of DSP course is designed based on the engineering project "Ground navigation system based on double CPU. " It provides the discussion of teaching content, method and practice which focuses on the experiment's composition, principles and design of software and hardware. It shows that students utilize the way of active practice and organic connection between courses to enhance theoretical knowledge and learning of engineering practice, gaining unprecedented learning effect.%根据DSP(digital signal processor)技术的特点,为实现“做中学”的思想,提出了基于工程构建DSP课程实验教学体系的理念,设计了以工程项目“基于双CPU的地面导航系统”为基础的DSP课程实验.围绕其构成、原理和软、硬件设计,探讨了DSP实验课实行工程化的教学内容、方法和实践效果.教学实践结果表明,学生主动实践、课程之间有机联系的方式加强了理论知识和工程实践的学习,取得了很好的学习效果.

  7. DSP 控制的薄膜微阀组集成微流体驱动系统设计%Design and implementation of the integrated microfluidic driving system based on DSP

    Institute of Scientific and Technical Information of China (English)

    王晓雨; 刘兴阳; 吴剑; 钱翔

    2015-01-01

    提出了一种基于 TMS320F28335 DSP 控制的微流控芯片气动微泵流体驱动系统,在 Unger 等制作的气动微泵基础上,将经典的六相控制方式简化为三相控制;在用气路致动频率控制微流道中流体流速的基础上,将气路开启占空比作为可能影响微流体流速的因素进行研究。DSP 接收 LabVIEW 程序发送的参数后,产生相应的 ePWM 波形输出,驱动电磁阀驱动电路控制电磁阀状态,实现对微流控芯片上气路状态的控制,利用气路周期性地传递压力波,进而实现弹性薄膜的顺序形变,最终实现对流道内流体流速控制。针对500μm 的微流体管道,可在8 Hz 致动频率下实现0~4μL/min 的可调流速;驱动占空比为40%~65%时,可获得较好的流速平台。%Microfluidic chip driving microfluid control system is designed,based on TMS320F28335 DSP.LabVIEW application is applied to send the signals to DSP to generate corresponding ePWM waveform,which is used to derive solenoid driver circuit.So-lenoid driver circuit is used to control gas line on microfluidic chip,sequential denection of elastic membranes is achieved by peri-odic pressure waveforms traveling through pneumatic channel,and eventually to control fluid flow inside the flow channel.The classic six-phase control is simplified to three-phase control,by introducing the Unger’s Pneumatic micropump.On the basis of the frequency as a pneumatic actuator control fluid flow in microfluidic channels,researched the gas line turn-on duty cycle as a parameter that may affect the microfluidic flow rate.Microfluidic conduit which width is 500 μm can be achieved 0-4 μL/min ad-justable flow rate under 8 Hz;at the same time when the driving duty ratio of 40%-65%,preferably at a platform obtained better flow velocity.

  8. 基于 DSP的数字图像处理实验的探究%Exploration on experiments of digital image processing based on DSP

    Institute of Scientific and Technical Information of China (English)

    鲁亿方; 蓝金辉; 迟健男

    2014-01-01

    With the rapid development of electronic science and computer science in recent years ,the digital image processing based on DSP has become a hot spot .This paper describes a series of image processing by using the DSP platform taking DM 642 as the core ,and makes exploration on later digital image processing experiment courses .%近年来,随着电子科学与计算机科学的快速发展,基于DSP(digital signal processor )的数字图像处理的研究已经成为热点。该文利用以DM642为核心的DSP平台进行了一系列数字图像处理,并为以后的数字图像处理实验课程进行了探索。

  9. Design of high-speed image processing system based on FPGA and DSP%基于FPGA和DSP的高速图像处理系统

    Institute of Scientific and Technical Information of China (English)

    舒志猛; 陈素华

    2012-01-01

    In order to improve the performance of image processing embedded system and reduce its power consumption, a high-efficient image processing embedded system which is based on the field programmable gate array and high-speed digital signal processor (DSP) is presented in this paper. DSP as a main processor is used to control the module of image process, and FPGA chip as a co-processor is used to control the data logic. In the whole system, a novel data transmission structure with a dual-port RAM (CY7CO25AV-15AI) is applied to the high-speed real-time image data by ping-pong technique. Because all operation in the system is divided between the FPGA and DSP in the form of the pipelined, the performance of the system is 25% higher than that of the processing system based on the single DSP. The system is easy to transplant other algorithms into it due to its reconfigurability.%为了提高图像处理系统的高性能和低功耗,提出了一种基于FPGA和DSP协同作业的高速图像处理嵌入式系统,其中DSP为主处理器,负责图像处理,而FPGA为协处理器,负责系统的所有数字逻辑.整个系统中FPGA和DSP的工作之间形成流水,同时借助于单片双口RAM(CY7C025AV-15AI)完成两者的通信,比使用单片DSP建立的处理系统性能提高25%左右.该系统具有可重构性,方便其他的算法于该系统上实现.

  10. FPGA based, DSP integrated, 8-channel SIMCON, ver. 3.0. Initial results for 8-channel algorithm

    Energy Technology Data Exchange (ETDEWEB)

    Giergusiewicz, W.; Koprek, W.; Jalmuzna, W.; Pozniak, K.T.; Romaniuk, R.S. [Warsaw Univ. of Technology (Poland). Inst. of Electronic Systems

    2005-07-01

    The paper describes design, construction and initial measurements of an eight channel electronic LLRF device predicted for building of the control system for the VUV-FEL accelerator at DESY (Hamburg). The device, referred in the paper to as the SIMCON 3.0 (from the SC cavity simulator and controller) consists of a 16 layer, VME size, PCB, a large FPGA chip (VirtexII-4000 by Xilinx), eight fast ADCs and four DACs (by Analog Devices). To our knowledge, the proposed device is the first of this kind for the accelerator technology in which there was achieved (the FPGA based) DSP latency below 200 ns. With the optimized data transmission system, the overall LLRF system latency can be as low as 500 ns. The SIMCON 3.0 sub-system was applied for initial tests with the ACC1 module of the VUV FEL accelerator (eight channels) and with the CHECHIA test stand (single channel), both at the DESY. The promising results with the SIMCON 3.0. encouraged us to enter the design of SIMCON 3.1. possessing 10 measurement and control channels and some additional features to be reported in the next technical note. SIMCON 3.0. is a modular solution, while SIMCON 3.1. will be an integrated board of the all-in-one type. Two design approaches - modular and all-in-one, after branching off in this version of the Simcon, will be continued. (orig.)

  11. Squid based beam current meter

    Energy Technology Data Exchange (ETDEWEB)

    Kuchnir, M.

    1983-11-25

    A SQUID based beam current meter has the capability of measuring the current of a beam with as little as 30 x 155 antiprotons (with a signal to noise ratio of 2). If low noise dc current is used to cancel most of the beam or an up-down counter is used to count auto-resets this sensitivity will be available at any time in the acumulation process. This current meter will therefore be a unique diagnostic tool for optimizing the performance of several Tev I components. Besides requiring liquid helium it seems that its only drawback is not to follow with the above sensitivity a sudden beam change larger than 16 ..mu..A, something that could be done using a second one in a less sensitive configuration.

  12. A Two Layers Novel Low-Cost and Optimized Embedded Board Based on TMS320C6713 DSP and Spartan-3 FPGA

    Directory of Open Access Journals (Sweden)

    Bahram Rashidi

    2013-05-01

    Full Text Available This paper presents the design and implementation of a new low-cost and minimum embedded board based on TMS320C6713 (PYP 208-PIN (PQFP DSP and Spartan-3 (XCS400-4PQG208C FPGA in two layers with mount elements on two sides of the board. The proposed embedded board was developed satisfactorily for different applications such as data acquisition of sensor’s with serial port, control units, finite state machines, signal processing algorithms, navigation computing, Kalman filtering etc. Goal of the design was to implement as many as possible low-cost and minimum sizes of the board, also to receive input signals in a short time period and as real time. The board features are include: mount elements in two side of the board for minimization of the proposed board and also placed decoupling capacitors (by pass for the DSP and FPGA in bottom layer of board strictly below these two ICs because should be placed as close as possible to the power supply pins DSP and FPGA, GND polygon layer is used in total top layer and microcomputer ground for DSP & FPGA in bottom layer, use FPGA for two aim ones for implementation of glue logic total of board and interface between serial connectors, use three RS-232 serial port, one RS-422, and SPI serial port on FPGA, use MT48LC16M16A SDRAM-256MB(4*4MB*16, Am29LV400B Flash memory 4 Megabit (512 K x 8-Bit/256 K x 16-Bit and XCF02S configuration PROM. The size of the proposed embedded board is 11.1cm*17. 7cm so this board is optimized of aspect cost, performance, power, weight, and size.

  13. DSP and FPGA based system to control a wind turbine generator implementing a variable speed vectorial control method

    OpenAIRE

    Perales Esteve, Manuel Ángel; Barrero, Federico; Mora Jiménez, José Luis; Galván Díez, Eduardo; Carrasco Solís, Juan Manuel; García Franquelo, Leopoldo

    1997-01-01

    The purpose of this paper is to describe a DSP and FPGA control system to implement a variable speed vectorial control. Two semi-systems, both of them consisting on a DSP, a FPGA and A/D, D/A & digital I/O’s are used. Each one will control an inverter: The first inverter implements a variable speed vector control of the induction generator and the second one handle the power injected into the utility grid. Experimental results will be shown to confirm the validity of the proposed controller.

  14. Cherenkov light-based beam profiling for ultrarelativistic electron beams

    Energy Technology Data Exchange (ETDEWEB)

    Adli, E., E-mail: Erik.Adli@fys.uio.no [Department of Physics, University of Oslo, N-0316 Oslo (Norway); SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025 (United States); Gessner, S.J.; Corde, S.; Hogan, M.J. [SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025 (United States); Bjerke, H.H. [SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025 (United States); Department of Physics, Norwegian University of Science and Technology, N-7491 Trondheim (Norway)

    2015-05-21

    We describe a beam profile monitor design based on Cherenkov light emitted from a charged particle beam in an air gap. The main components of the profile monitor are silicon wafers used to reflect Cherenkov light onto a camera lens system. The design allows for measuring large beam sizes, with large photon yield per beam charge and excellent signal linearity with beam charge. The profile monitor signal is independent of the particle energy for ultrarelativistic particles. Different design and parameter considerations are discussed. A Cherenkov light-based profile monitor has been installed at the FACET User Facility at SLAC. We report on the measured performance of this profile monitor.

  15. 基于DSP2812的桌面3D打印机控制系统实现%Realization of Desktop 3D Printer Control System Based on DSP2812

    Institute of Scientific and Technical Information of China (English)

    时云; 梁宇; 张成林; 王卓; 王联凤; 王力; 田海林

    2016-01-01

    DSP2812数字信号处理芯片为核心控制器,设计了一种桌面3D打印机控制系统,应用DSP2812中的通用寄存器生成的非对称式脉冲宽度调制(PWM)波形结合 DSP2812的通用输入/输出(I/O)口控制步进电机驱动芯片,进而实现步进电机的速率和位移控制;同时还创新性地应用DSP2812的通用数字I/O 口实现双向的两线连续总线(I2 C)功能,实现对步进电机的细分控制,从而控制步进电机的启动电流,降低系统功耗,提高步进电机的控制精度及稳定性。%A control system of desktop 3D printer was designed with DSP2812 digital signal processing chip as the core controller.By generating non-symmetric pulse width modulation (PWM)waveform with the general-purpose registers of the DSP2812,and using general-purpose input/output (I/O)port to control the stepper motor driver chip,the velocity and displacement control of the stepper motor was achieved.Another innovative application was using DSP2812’s general-purpose digital I/O port to achieve universal inter-integrated circuit (I2 C)function, and then to control the stepper motor’s starting current,which could reduce system power consumption and improve control accuracy and stability of the stepper motor.

  16. 基于DSP的无线指纹考勤系统%Wireless Fingerprint Attendance System Based on DSP

    Institute of Scientific and Technical Information of China (English)

    李建坡; 朱绪宁; 唐宁

    2012-01-01

    Aiming at the disadvantages existing in traditional attendance checking methods, such as false drawbacks and complicated wirings, the wireless fingerprint attendance system based on DSP and ZigBee technology is proposed. The system consists of fingerprint acquisition terminal,wireless transmission module, the attendance management module in host computer and printout equipment. Various functions are implemented by the system, e. g. fingerprint acquisition, preprocessing, feature extraction, wireless transmission, fingerprint matching and attendance management, etc. The practice indicates that the system provides effective and reliable solution with simple wiring for attendance management in medium and large enterprises.%针对传统考勤方式所存在的代打卡和布线麻烦等弊端,提出了一种基于DSP和ZigBee技术的无线指纹考勤系统设计方案.系统主要由指纹采集终端、无线传输模块、上位机考勤管理模块和打印输出设备等组成,能够自动实现指纹图像的采集、预处理、特征提取、无线传输、特征匹配以及考勤管理等功能.实践证明,该系统为大中型企业的考勤管理提供了一种布线简单、有效、可靠的解决方案.

  17. Transplantation and Appl ication of MAVLink Micro Unmanned Air Vehicle Communication Protocol Based on DSP%DSP 的 MAVLink 微型无人机通信协议移植与应用

    Institute of Scientific and Technical Information of China (English)

    吕强; 倪佩佩; 王国胜; 刘峰

    2014-01-01

    MAVLink micro unmanned air vehicle communication protocol is widely used in communications between the ground control station and unmanned air vehicle flight control platform such as PIXHAWK,SLUGS and ArduPilot.MAVLink has been proven to work on ARM7,ATmega and STM32 microcontrollers and it can be developed under Windows,Linux and MacOS operating systems. Because of MAVLink'incompatibility with DSP,a method is proposed to transplant MAVLink to DSP and communicate with ground control station software QGroundControl via WiFi.Experimental results show that this method can effectively make MAVLink compati-ble with DSP,reduce CPU consumption via SPI-to-WiFi,improve data transmission rates and reduce data loss.%MAVLink 微型无人机通信协议广泛应用于地面控制站与 PIXHAWK、SLUGS 和 ArduPilot 等无人机飞控平台的通信。MAVLink 已被证明能够工作在 ARM7、ATmega、STM32等微控制器上,并能在 Windows、Linux 和 MacOS 操作系统下开发。由于 MAVLink 与 DSP 不兼容,故本文提出一种将 MAVLink 移植到 DSP,并通过 WiFi 与地面控制站软件 QGroundControl 进行通信的方法。实验证明,该方法能够使 MAVLink 有效兼容 DSP,并且通过 SPI 转 WiFi 连接,减小了 CPU 开销,提高了数据传输速率,减少了数据的丢失情况。

  18. 基于DSP的防撞雷达信号采样系统设计%Design of automotive anti-collision radar sampling system based on DSP

    Institute of Scientific and Technical Information of China (English)

    张恒; 刘胜利; 范江涛; 王良

    2012-01-01

    Directed toward the linear frequency modulation continuous wave radar, an ADC which has two simultaneous differential inputs is chosen, and a system based on SPORT port of DSP is designed to sample the I and Q quadrature signals. Tlie system validity is validated via experiments.%针对线性调频连续波汽车防撞雷达回波信号的特点,选用串行差分ADC,设计了一种基于DSP的SPORT口的I、Q双通道采样系统,并通过实验验证了系统的正确性.

  19. Key Technologies Development of Transient Signals Based Protection Device Using DSP and S-Transform

    Science.gov (United States)

    Liu, Xingmao; Zheng, Gao

    2017-05-01

    The correctness of new principle of transient signal based protection used to be verified by simulating. In order to further introduce the dynamic simulation experiments for the transient signal based protection algorithm, the key technologies of transient signal based protection device were developed. The hardware of the synchronous multi-channel data acquisition and high-speed data processing was designed with kernel of high speed floating point digital signal processor TMS320C6748 and simultaneous sampling analog-to-digital converter. The sampling program reads the AD conversion data using DMA mode, which reduce the consumption of CPU time. The S transform was used to extract the fault traveling wave signals from the sampled data. The time consumption of algorithm which extract the traveling wave was analyzed when it ran on TMS320C6748. The test result shows that the hardware and software design is feasible.

  20. DSP-Based Hands-On Laboratory Experiments for Photovoltaic Power Systems

    Science.gov (United States)

    Muoka, Polycarp I.; Haque, Md. Enamul; Gargoom, Ameen; Negnetvitsky, Michael

    2015-01-01

    This paper presents a new photovoltaic (PV) power systems laboratory module that was developed to experimentally reinforce students' understanding of design principles, operation, and control of photovoltaic power conversion systems. The laboratory module is project-based and is designed to support a renewable energy course. By using MATLAB…

  1. Hyper-chaotic LÜ System Simulation Design of Digital Circuit Based on DSP Builder

    Directory of Open Access Journals (Sweden)

    Zhang Xiaohong

    2013-05-01

    Full Text Available In order to overcome sensitive defects of components deviations and environment defects in analog circuit design, a novel four-dimensional hyperchaotic systems is constructed based on LÜ system. Basic nonlinear dynamics characteristics are analyzed to the new system. By optimizing the design of sampling frequency selection, gain adjustments, parameter configuration etc., the hyperchaotic circuit runs stably while the signal amplitude is reasonably controlled. Curves of the digital chaotic sequence show smooth without jagged shape. The circuit can be applied to other digital realization of chaotic systems with commonality and expandability. Its experimental results fully consistent with phase space structures of the continuous chaotic system, which shows the development of chaotic systems based on FPGA is feasible and practical.

  2. DSP-based fuzzy implementation of indirect vector controlled induction motor

    Energy Technology Data Exchange (ETDEWEB)

    Radwan, T.S.; Uddin, M.N.; Rahman, M.A. [Memorial University of Newfoundland, Faculty of Engineering and Applied Science, St John' s, NF (Canada)

    2000-08-01

    In this paper, the fuzzy logic speed controller for high performance induction motor drive is proposed. The controller is based on the indirect vector control. The fuzzy logic speed controller is employed as an outer loop. The results of applying the developed fuzzy logic controllers are compared to those obtained by the application of a conventional PI controller. The results indicate superior performance and robustness of fuzzy logic controllers over the PI controller at any working conditions. (orig.)

  3. Embedded DSP-based telehealth radar system for remote in-door fall detection.

    Science.gov (United States)

    Garripoli, Carmine; Mercuri, Marco; Karsmakers, Peter; Jack Soh, Ping; Crupi, Giovanni; Vandenbosch, Guy A E; Pace, Calogero; Leroux, Paul; Schreurs, Dominique

    2015-01-01

    Telehealth systems and applications are extensively investigated nowadays to enhance the quality-of-care and, in particular, to detect emergency situations and to monitor the well-being of elderly people, allowing them to stay at home independently as long as possible. In this paper, an embedded telehealth system for continuous, automatic, and remote monitoring of real-time fall emergencies is presented and discussed. The system, consisting of a radar sensor and base station, represents a cost-effective and efficient healthcare solution. The implementation of the fall detection data processing technique, based on the least-square support vector machines, through a digital signal processor and the management of the communication between radar sensor and base station are detailed. Experimental tests, for a total of 65 mimicked fall incidents, recorded with 16 human subjects (14 men and two women) that have been monitored for 320 min, have been used to validate the proposed system under real circumstances. The subjects' weight is between 55 and 90 kg with heights between 1.65 and 1.82 m, while their age is between 25 and 39 years. The experimental results have shown a sensitivity to detect the fall events in real time of 100% without reporting false positives. The tests have been performed in an area where the radar's operation was not limited by practical situations, namely, signal power, coverage of the antennas, and presence of obstacles between the subject and the antennas.

  4. DSP-based optical modulation technique for long-haul transmission

    Science.gov (United States)

    Yoshida, T.; Sugihara, T.; Uto, K.

    2015-01-01

    Fiber nonlinearity and equalization-enhanced phase noise (EEPN) generate rapid perturbations and critically limit the system capacity and range of long-haul optical transmission. It is possible to cancel the rapid perturbations by introducing a particular correlation between multiple signals at the transmitter and analyzing the received signals using digital signal processing. In this paper, we review our proposed techniques to cancel rapid perturbations of polarization multiplexed signals due to fiber nonlinearity and EEPN. Numerical simulation of quaternary phase-shift keying based signals shows 1.2 dB and 0.5 dB improvement respectively from the proposed cancellation techniques for fiber nonlinearity and EEPN.

  5. Adaptive Signal Processing Testbed: VME-based DSP board market survey

    Science.gov (United States)

    Ingram, Rick E.

    1992-04-01

    The Adaptive Signal Processing Testbed (ASPT) is a real-time multiprocessor system utilizing digital signal processor technology on VMEbus based printed circuit boards installed on a Sun workstation. The ASPT has specific requirements, particularly as regards to the signal excision application, with respect to interfacing with current and planned data generation equipment, processing of the data, storage to disk of final and intermediate results, and the development tools for applications development and integration into the overall EW/COM computing environment. A prototype ASPT was implemented using three VME-C-30 boards from Applied Silicon. Experience gained during the prototype development led to the conclusions that interprocessor communications capability is the most significant contributor to overall ASPT performance. In addition, the host involvement should be minimized. Boards using different processors were evaluated with respect to the ASPT system requirements, pricing, and availability. Specific recommendations based on various priorities are made as well as recommendations concerning the integration and interaction of various tools developed during the prototype implementation.

  6. 基于DSP和ARM的车载组合导航计算机设计%Design of Vehicle Integrated Navigation Computer Based on DSP and ARM

    Institute of Scientific and Technical Information of China (English)

    龚柏春; 李岁劳; 颜开思; 马戎

    2011-01-01

    为了满足项目中对导航系统的小型化、低成本以及高精度等要求,设计了基于DSP和ARM构成的车载双核嵌入式导航计算机系统.采用DSP作为导航解算计算机,完成导航数据的快速融合与解算处理;采用ARM处理器负责系统级的控制和部分数据的采集;采用CPLD完成其他导航数据经V/F后的采集、译码和控制以及时间对准.通过USB接口实现大容量数据存储,通过双口RAM实现双CPU通信.实验结果表明,该系统达到了预期的设计要求.%To meet the requirements of integrated vehicle navigation system, an embedded navigation computer system based on DSP and ARM was designed. The system adopted DSP as navigation computer to complete rapid fusion and calculation of navigation data. ARM CPU completed the system-level control and the acquisition of GPS and image information etc. CPLD completed some decoding, control and the acquisition of other navigation data after V/F. Large amounts of data were stored through the USB interface of S3C2440A, DSP communicated with ARM via dual port RAM. Experimental results show that the system can meet the design requirements.

  7. 基于DSP的助行外骨骼机器人步态控制%DSP-Based Gait Pattern Control of Exoskeleton Robot for Walk-Aid

    Institute of Scientific and Technical Information of China (English)

    钟翠华; 沈林勇; 任昭霖; 邵文韫

    2012-01-01

    助行外骨骼机器人是一种帮助老年人和下肢不便的残疾人扩展行走能力的助力装置.提出一种基于数字信号处理(digital signal processing,DSP)系统的步态控制方法,首先,将连续步态数据离散处理后的结果作为DSP系统的输入,通过执行机构实现机器人的步态行走;然后,在每个步态周期结束之后,通过编码器对步态角度实时采样;最后,控制系统对反馈数据处理后实现步态误差的周期补偿.通过样机试验验证上述方法,得到较好的结果.%The exoskeleton robot is a health-aid device for the elderly and handicapped to walk. This paper presents a method of gait pattern control for exoskeleton robots based on digital signal processing (DSP). It converts the continuous gait pattern into discrete, and sends it to the input of a DSP system in order to realize robot gait patterns through actuators. At the end of each gait cycle, the encoder collects the angle information of the gait. The control system then processes feedback data and compensates for the gait error periodically. The described method is verified with a prototype with satisfactory results.

  8. Appoach to realizing weak hydroacoustic beaconing signal based on DSP%一种基于DSP的声信标弱信号提取方法

    Institute of Scientific and Technical Information of China (English)

    李笑媛; 程晶; 那健

    2014-01-01

    介绍一种基于DSP处理模块实现声信标弱信号提取的方法。针对声信标的性能参数及其具体应用环境,采用一种在加性白噪声环境下能够使信号的输出信噪比达到最大的匹配滤波方法,并将其在DSP处理模块上实现,最终将检测结果以音频和视频的形式输出。经过实际应用测试,该方法易于实现,实时性好,在复杂的海洋背景噪声下可以较好提高声信标的作用距离。%This paper introduces a method to realize weak hydroacoustic beaconing signal detecting base on DSP. According to the capability parameters of the hydroacoustic beaconing that the subject have adopted and the application of the hydroacoustic beaconing to the specific environment, also because the matching filter is the best filter means in the condition of additive white noise, it can make the SNR of the output signal to maximize, so this paper adopted the matching filter method, and at last the subject realized weak hydroacoustic beaconing signal detecting on DSP module. After real testing, the system which is good for weak hydroacoustic beaconing signal detecting can run real-time and realize easily. After sea trials, the system using the method can quickly find the target when hydroacoustic beaconing in a long distance. The sea trials shows the method can improve detection distance and easy to use in the areas of the weak hydroacoustic beaconing signal detecting.

  9. 基于DSP的瞬态碰撞信号采集存储系统%Data acquisition system for transient collision signal based on DSP

    Institute of Scientific and Technical Information of China (English)

    徐超; 王利; 吕昊暾; 刘振强

    2011-01-01

    In allusion to the fast measurements and records for transient collision signal, the device with DSP TMS320L F2407A as control unit and AM29LV800B.flash memory was introduced. Based on A/D converter inside DSP, Accessorial circuit including the signal conditioning circuit, Flash memory interface and the corresponding controlling software are designed and the system is of small size. The collision test of piezoelectric crystals verified the feasibility and it recorded the complete real-time data. The device can be applied to the environment of a variety of transient signal acquisition, and it can store those data even if the power supply is shut off. After recycling, the data can be read out to analyze.%针对瞬态碰撞信号的快速测量及记录,介绍了一种DSP TMS320LF2407A 为控制器,AM29LV800B为Flash闪存的瞬态信号采集存储系统.该小型化数据采集存储系统利用了DSP器件内的ADC模块,设计了包括信号调理电路、Flash存储器接口电路等辅助电路和相应的控制软件.利用压电晶体的碰撞试验验证了可行性,记录完整的实时信号数据.可应用于多种瞬态信号采集的场合,并能在系统掉电的情况下保持测试所得的数据,便于分析.

  10. Design of intelligent voice control system based on DSP%基于DSP的智能语音控制系统设计

    Institute of Scientific and Technical Information of China (English)

    郑微; 李正周; 田蕾

    2012-01-01

    利用语音命令实现与智能设备的交互已经成为现代控制理论研究的热门话题之一.介绍了一种基于数字信号处理器(DSP)、语音采集模块、无线收发模块、片上外设等资源实现的语音命令控制处理系统.该系统首先通过语音采集模块采集到语音控制信号;然后通过DSP和相应的片上外设实现对语音命令的识别;最后将识别的语音命令传递给无线收发模块以实现对于智能设备的控制.整个系统的设计应用领域广泛,可以为人机交互提供一种切实可行的参考方案.%Using voice commands to realize the interaction with intelligent equipment has become one of the hot topics in modern control theory. The voice command control processing system based on DSP, voice acquisition module, wireless transceiver module, on-chip peripheral resources is designed and realized. The voice control signals is acquired by the voice acquisition module in the system,and voice commands is recognized by DSP and on-chip peripheral resources, and the identified voice commands is transferred to the wireless transceiver module to control the intelligent equipment. The design application field of the whole system is very wide, and provides a kind of feasible and practical reference for human-computer interaction.

  11. Experimental Investigation of Cooperative Schemes on a Real-Time DSP-Based Testbed

    Directory of Open Access Journals (Sweden)

    Per Zetterberg

    2009-01-01

    Full Text Available Experimental results on the well-known cooperating relaying schemes, amplify-and-forward (AF, detect-and-forward (DF, cooperative maximum ratio combining (CMRC, and distributed space-time coding (DSTC, are presented in this paper. A novel relaying scheme named “selection relaying” (SR, in which one of two relays are selected base on path-loss, is also tested. For all schemes except AF receive antenna diversity is as an option which can be switched on or off. For DF and DSTC a feature “selective” where the relay only forwards frames with a receive SNR above 6 dB is introduced. In our measurements, all cooperative relaying schemes above increase the coverage area as compared with direct transmission. The features “antenna diversity” and “selective” improve the performance. Good performance is obtained with CMRC, DSTC, and SR.

  12. Electromyography Collection and Processing Based on DSP%基于DSP的肌电信号采集处理

    Institute of Scientific and Technical Information of China (English)

    冯艳梅; 仲雪飞; 王俊俊; 孙瀚; 赵华平; 张雄

    2014-01-01

    As an important biological signal,electromyography( EMG) has been used widely in bionics,biofeedback, sports medicine and rehabilitation engineering. Recently, the research and development on EMG grow rapidly. Focusing on the collection and analysis of the EMG,the muscle localization can be found to generate strong EMG,i. e. the most suitable position for the placement of the electrode based on the existing data collection amplifying circuit and DSP development platform. MATLAB is used to analyze the EMG signal from 9 gestures,filter the signal and draw the conclusions. The interference sources in the acquisition process are also analyzed and the method of re-ducing interference of the 50 Hz power frequency signal is found.%肌电信号( Electromyography) EMG作为一种重要的生物电信号,已经被广泛应用于仿生学、生物反馈、运动医学和康复工程中。近年来,肌电信号的研究发展日益迅猛。主要研究了肌电信号的采集、分析,基于现有的数据采集放大电路和DSP开发平台,找出肌肉产生肌电信号较强的位置即最合适安放采集电极的位置。本文选择了9种手势动作,运用MATLAB对做不同手势动作时采集的肌电信号进行离线分析,同时对肌电信号进行滤波处理,分析得出结论。对采集过程中的干扰源进行分析,尽可能减少50 Hz工频信号的干扰。

  13. Programmable DSP-Based Multi-Bunch Feedback - Operating Experience from Six Installations

    Energy Technology Data Exchange (ETDEWEB)

    Fox, John D

    2000-05-15

    A longitudinal instability control system, originally developed for the PEP-II, DAPHNE and ALS machines has in the last two years been commissioned for use at the PLS and BESSY-II light sources. All of the installations are running identical hardware and use a common software distribution package. This common structure is beneficial in sharing expertise among the labs, and allows rapid commissioning of each new installation based on well-understood diagnostic and operational techniques. While the installations share the common instability control system, there are significant differences in machine dynamics between the various colliders and light sources. These differences require careful specification of the feedback algorithm and system configuration at each installation to achieve good instability control and useful operational margins. This paper highlights some of the operational experience at each installation, using measurements from each facility to illustrate the challenges unique to each machine. The authors experience on the opportunities and headaches of sharing development and operational expertise among labs on three continents is also offered.

  14. DSP Based Control Implementation of an AC/DC Converter with Improved Input Current Distortion

    Directory of Open Access Journals (Sweden)

    WISUTMETHEEKORN, P.

    2011-05-01

    Full Text Available This paper presents a digital signal processor based control of an AC/DC converter with nearly unity power factor. Normally, the output voltage of a single-phase AC/DC converter comprises a voltage ripple with twice line-frequency. This affects the voltage control loop and leads to the converter input current distortion. The purposed method is designed to avoid the effect of the output voltage ripple. To verify the proposed control method, MATLAB/Simulink is used for system simulation. A hardware prototype is setup. A low cost digital signal processing chip dsPIC30F4011 is employed as a digital controller to control a CUK AC/DC converter. The converter specifications are 48V output voltage and 250W output power. From the simulation and the experimental results shown that the input current distortion of the purposed system is reduced and lower than the AC/DC converter that controlled by the conventional proportional-integral controller.

  15. 基于DSP实现舰船目标检测与跟踪%An Implementation of Ships Target Dectection and Tracking Based on DSP

    Institute of Scientific and Technical Information of China (English)

    窦兴川; 王小东

    2012-01-01

    As a digital signal processing platform,DSP is used more and more widely with its performance improvement. The main frequency of C64XX of TI Company can reach 1.1 GHz while its processing speed can reach up to 9 000 MIPS. The DSP processing system based on single board of C6416 can realize the CFAR,target quantization inspection and track for target clutter in radar naviga- tion. Using DSP/BIOS real time kernel and fully combining the features of DSP,this method can use such three modes as hardware interrupt and software interrupt and task to implement function assignment and dispatching according to different functions. Within the coverage range of 24 nautical miles,it can detect and track 200 targets while there are 4 096 azimuths for each circle and the distance resolution is 6 meters. The α-β filtering algorithm is used as tracking algorithm.%DSP作为数字信号处理平台,随性能的不断提高其应用越来越广泛。TI公司的C64XX系列,主频达到1.1GHz,处理速度达到9000MIPS。基于单片C6416的DSP处理系统可以实现导航雷达中目标杂波的恒虚警处理、目标量化检测与跟踪,充分结合DSP的特点,采用DSP/BIOS实时内核,根据功能的不同采用硬件中断、软件中断和任务的方式实现功能的分配和调度,可以在24nmile的覆盖范围内,每周4096个方位。A/D采集点距离分辨率3m的条件下,检测和跟踪200个目标,跟踪算法选用α-β滤波算法。

  16. FPGA上的DSP%DSP on FPGA

    Institute of Scientific and Technical Information of China (English)

    仲巡

    2000-01-01

    @@ 数字信号处理(DSP),如FIR、IIR、FFT、IFFT,主要由MAC(乘加)操作构成,而实现MAC操作需要消耗大量的FPGA逻辑资源.通过在FPGA硅片上预先构造出大量的可编程的ECU(嵌入式计算单元)、DpRAM(双口随机存储器),Quicklogic公司提供一种可用于高速、并行、复杂DSP算法的F P G A.算法和计算系数可装入DpRAM,用以操作功能强大的ECU,以实现单时钟周期计算.

  17. A DSP-based readout and online processing system for a new focal-plane polarimeter at AGOR

    Energy Technology Data Exchange (ETDEWEB)

    Hagemann, M.; Bassini, R.; Berg, A.M. van den; Ellinghaus, F.; Frekers, D.; Hannen, V.M.; Haeupke, T.; Heyse, J.; Jacobs, E.; Kirsch, M.; Kruesemann, B.; Rakers, S.; Sohlbach, H.; Woertche, H.J. E-mail: wortche@ikp.uni-muenster.de

    1999-11-21

    A Focal-Plane Polarimeter (FPP) for the large acceptance Big-Bite Spectrometer (BBS) at AGOR using a novel readout architecture has been commissioned at the KVI Groningen. The instrument is optimized for medium-energy polarized proton scattering near or at 0 deg. . For the handling of the high counting rates at extreme forward angles and for the suppression of small-angle scattering in the graphite analyzer, a high-performance data processing DSP system connecting to the LeCroy FERA and PCOS ECL bus architecture has been made operational and tested successfully. Details of the system and the functions of the various electronic components are described.

  18. 基于DSP的铁道钢轨外形磨耗测量仪数采系统%Portable Rail Profilometer's Measurement System Based on DSP

    Institute of Scientific and Technical Information of China (English)

    彭艳; 周文祥; 田文杰

    2011-01-01

    According to measuring model of the rail profilometer, the measurement system's hardware and software was designed based on DSP TMS32OF2812. This paper mainly introduced the hardware interface of the DSP and the photoelectrie encoder. The initialization of the EV module was introduced in detail, the same as the data acquisition and processing . The experiment indicates that the system can measure the rail head's appearance and calculate the vertical and lateral wear ahrasion accurate ly and conveniently.%根据钢轨外形磨耗测量仪的工作原理,设计了基于DSPTMS320F2812数据采集系统的硬件方案和软件方案.主要介绍了光电编码器与DSP的硬件接口及数采系统的供电方案;并阐述了EV模块的初始化程序和钢轨轨头数据采集与处理流程.实践证明,该系统能够准确、方便地测量铁道钢轨轨头曲线外形,并计算得出垂直磨耗与侧面磨耗值.

  19. QR code decoding system based on ADI low-cost DSP%一种基于ADI低成本DSP实现的QR码识别系统

    Institute of Scientific and Technical Information of China (English)

    余维克; 黎福海

    2013-01-01

    A QR code decoding system which can be implemented on ADI low-cost DSP is designed. The system is based on image processing and implemented on the hardware platform with center processor BF592. The whole system is running within 32 KB data memory, including image capturing and displaying, image storing and thresholding using paralleled timing, QR code detection with multi-direction scanning, sampling and decoding and so on. The experimental result shows the good performance of the system.%设计了一种可在ADI低成本DSP(小内存平台)上实现的QR码识别系统,并在以BF592为核心的硬件平台上实现.系统基于图像处理方法,在32 KB的数据空间内实现了二值化压缩并行的图像采集时序、多个方向扫描对QR码进行定位、采样解码等功能.经测试,该系统取得了良好的识别效果.

  20. Circuitry Protector of Microcomputer Based on ARM and DSP%基于ARM和DSP的微机线路保护装置

    Institute of Scientific and Technical Information of China (English)

    张小伟

    2012-01-01

    This paper utilizes the effective and rapid digital signal processing capability of digital signal processor(DSP) and the powerful Ethernet network communication function of embed advanced reduced instruction set chip machine(ARM) processor,adopts the dual central processing unit(CPU) hardware structure combined DSP with ARM9,which uses the dual-interface random access memory(RAM) to perform the data exchange between them.The software design is based on embed Linux operating system,replants Bootloader and kernel,constructs the root file system of Ramdisk,and replants the application program.%在微机线路保护中,利用数字信号处理器(DSP)高效快速的数字信号处理能力和嵌入式先进的精简指令集芯片机器(ARM)处理器强大的以太网通信功能,采用DSP+ARM9的双中央处理器(CPU)的硬件结构,两者之间采用双口随机存储器(RAM)进行数据交换。软件设计基于嵌入式Linux操作系统,移植了Bootloader、内核,构建了Ramdisk的根文件系统,并移植了应用程序。

  1. 基于DSP的多台步进电机控制系统设计%Design on Control System of Motors Based on DSP

    Institute of Scientific and Technical Information of China (English)

    白琨; 张春鹏; 冯敏亮

    2012-01-01

    Robot motion control and execution involving more than three stepping motors is always a difficult problem. Introduced the design of muhiple stepping motor control system composed of the three stepping motors, DSP and drive system. Presented control method of three stepping motor by a DSP platform, and gived each motor control pins and a memory arrangement method and different algorithms. Posture control of the robot can be achieved based on the multiple stepping motors speed and position control, the method also can be used to control system test, demonstration and so on.%机器人的动作控制与执行涉及三台以上的步进电机,一直是个难题.基于DSP设计了由步进电机和驱动系统组成的多台步进电机控制系统,提出了三台步进电机的控制方法,给出了每台电机的控制引脚和存储器设置方法以及不同的算法.通过对多台步进电机加减速及位置等的控制可以实现机器人的姿态控制,该方法还可用于控制系统的试验、演示等.

  2. The Implementation of Multiple Threads Executed Concurrently Based on DSP/BIOS%基于DSP/BIOS的多线程并发执行的实现

    Institute of Scientific and Technical Information of China (English)

    徐婷; 屈姗姗

    2011-01-01

    This paper analysed the real-time kernel named DSP/BIOS, took the network-based digital receiver as research background, detailed designed the thread and task scheduling, In the form of thread, each sub-module, allocated system resources, achieved the task scheduling and communication, that the purpose of multiple threads executed concurrently was achieved, Practical results show that the DSP / BIOS kernel can reduce the complexity of system development, improve the efficiency of program execution.%分析了弭公司实时操作系统DSP/BIOS,以网络化数字接收机为研究背景,进行详细的线程设计和任务调度设计。以线程的形式安排备个子模块的功能,分配系统资源,实现了任务的调度和通信+从而达到多线程并发执行的目的。实践结果表明,采用DSP/BIOS内核可以降低系统开发的复杂度,提高程序执行的效率。

  3. Benchmarking a DSP processor

    OpenAIRE

    Lennartsson, Per; Nordlander, Lars

    2002-01-01

    This Master thesis describes the benchmarking of a DSP processor. Benchmarking means measuring the performance in some way. In this report, we have focused on the number of instruction cycles needed to execute certain algorithms. The algorithms we have used in the benchmark are all very common in signal processing today. The results we have reached in this thesis have been compared to benchmarks for other processors, performed by Berkeley Design Technology, Inc. The algorithms were programm...

  4. Design and Implementation of a DSP-Based MIMO System Prototype for Real-Time Demonstration and Indoor Channel Measurements

    Directory of Open Access Journals (Sweden)

    Jeffrey H. Reed

    2005-09-01

    Full Text Available The design and implementation of the Virginia Tech Space-Time Advanced Radio (VT-STAR, a multiple antenna element space-time (ST processing prototype testbed, is presented. The testbed is a research tool for comparing practical and theoretical performance metrics (e.g., throughput, link reliability in different wireless channel conditions. The prototype builds around software-defined radio (SDR concepts on a DSP platform and provides the flexibility to implement various forms of ST techniques. Different components of the system are described in detail, including the software implementation, I/O schemes with custom hardware, and data transfer mechanisms between the DSP and the host PC. Two different example realizations are presented, a real-time demonstration and an offline measurement tool. Finally, some representative measurement results obtained in indoor environments are presented. These results show VT-STAR to be a promising tool for performing MIMO experiments and generating channel measurements that can complement simulation studies in this area.

  5. Implementation of Fast-ICA: A Performance Based Comparison Between Floating Point and Fixed Point DSP Platform

    Science.gov (United States)

    Patil, Dinesh; Das, Niva; Routray, Aurobinda

    2011-01-01

    The main focus of the paper is to bring out the differences in performance related issues of Fast-ICA algorithm associated with floating point and fixed point digital signal processing (DSP) platforms. The DSP platforms consisting of TMS320C6713 floating point processor and TMS320C6416 fixed point processor from Texas Instruments have been chosen for this purpose. To study the consistency of performance, the algorithm has been subjected to three different test cases comprising of a mixture of synthetic signals, a mixture of speech signals and a mixture of synthetic signals in presence of noise, respectively. The performance of the Fast-ICA algorithm on floating point and fixed point platform are compared on the basis of accuracy of separation and execution time. Experimental results show insignificant differences in the accuracy of separation and execution time obtained from fixed point processor when compared with those obtained from floating point processor. This clearly strengthens the feasibility issue concerning hardware realization of Fast-ICA on fixed point platform for specific applications.

  6. A real-time tracking system of infrared dim and small target based on FPGA and DSP

    Science.gov (United States)

    Rong, Sheng-hui; Zhou, Hui-xin; Qin, Han-lin; Wang, Bing-jian; Qian, Kun

    2014-11-01

    A core technology in the infrared warning system is the detection tracking of dim and small targets with complicated background. Consequently, running the detection algorithm on the hardware platform has highly practical value in the military field. In this paper, a real-time detection tracking system of infrared dim and small target which is used FPGA (Field Programmable Gate Array) and DSP (Digital Signal Processor) as the core was designed and the corresponding detection tracking algorithm and the signal flow is elaborated. At the first stage, the FPGA obtain the infrared image sequence from the sensor, then it suppresses background clutter by mathematical morphology method and enhances the target intensity by Laplacian of Gaussian operator. At the second stage, the DSP obtain both the original image and the filtered image form the FPGA via the video port. Then it segments the target from the filtered image by an adaptive threshold segmentation method and gets rid of false target by pipeline filter. Experimental results show that our system can achieve higher detection rate and lower false alarm rate.

  7. Super-Altro 16: a Front-End System on Chip for DSP Based Readout of Gaseous Detectors

    CERN Document Server

    Aspell, P.; Franca, H.; Garcia Garcia, E.; Musa, L.

    2013-01-01

    This paper presents the architecture, design and test results of an ASIC specifically designed for the readout of gaseous detectors. The primary application is the readout of the Linear Collider Time Projection Chamber. The small area available (4mm2/channel) requires an innovative design, where sensitive analog components and massive digital functionalities are integrated on the same chip. Moreover, shut down (power pulsing) features are necessary in order to reduce the power consumption. The Super-Altro is a 16-channel demonstrator ASIC involving analog and digital signal processing. Each channel contains a low noise Pre-Amplifier and Shaping Amplifier (PASA), a pipeline ADC, and a Digital Signal Processor (DSP). The PASA is programmable in terms of gain and shaping time and can operate with both positive and negative polarities of input charge. The 10-bit ADC samples the output of the PASA at a frequency up to 40MHz before providing the digitized signal to the DSP which performs baseline subtraction, signa...

  8. 基于DSP的LCD显示控制与设计%Control and Design of LCD Display Based on DSP

    Institute of Scientific and Technical Information of China (English)

    张永斌; 胡金高

    2011-01-01

    采用了一种DSP控制LXD模块的显示方案,并对系统的硬件和软件进行了分析.该方案关键在于采用通用I/O口对读写时序进行模拟,利用C语言具体的实现方法以及LCD模块丰富的显示功能,实现了DSP与LCD显示模块的良好接口,并在实际工作场合得到了应用.测试结果表明,该显示系统工作稳定、显示效果较好、刷新速度快,能够达到预期显示目标.%A display program of LCD display module controlled by DSP has been adopted, and the system's hardware and software are analyzed. This display program lies in timing simulation of writing and reading by using general I/O port. Using specific implementation methods of C language, and rich display of LCD module, a better interface between DSP and LCD display module is realized, and has been applied in the actual workplace. Test shows that the display system is stable, and has better display quality and faster refresh rate, can achieve the desired objectives.

  9. Experimental demonstration of a DSP-based cross-channel interference cancellation technique for application in digital filter multiple access PONs.

    Science.gov (United States)

    Al-Rawachy, E; Giddings, R P; Tang, J M

    2017-02-20

    A DSP-based cross-channel interference cancellation (CCIC) technique with initial condition-free, fast convergence and signal modulation format independence, is experimentally demonstrated in a two-channel point-to-point digital filter multiple access (DFMA) PON system based on intensity-modulation and direct-detection (IMDD). The CCIC-induced transmission performance improvements under various system conditions are fully investigated for the first time. It is shown that with one iteration only the CCIC technique can achieve a reduction in individual OFDM subcarrier BERs of more than 1000 times, an increase in transmission capacity by as much as 19 times and an increase in optical power budget by as much as 3.5dB. The CCIC technique thus has the potential to drastically improve the transmission performance of DFMA PONs.

  10. 基于 DSP 的燃料电池车复合直流系统的设计与实现%Design and Implementation of Compound DC System for Fuel Cell Vehicle Based on DSP

    Institute of Scientific and Technical Information of China (English)

    曹晓娟; 庹朝永

    2015-01-01

    A scheme of compound DC system for fuel cell vehicles is proposed, which uses a digital signal processor to control a single DC / DC converter to achieve unified energy management of DC system. There are four different working modes and they can be classified into two circuit topologies: series / parallel resonant converter and series resonant converter, in which the soft switching condition of series and parallel resonant converter is ana-lyzed in detail. By taking into account the effects of the parasitic capacitance of rectifying transistor in the secondary side of transformer on the process of dead time commutation, the analyzed critical condition of magnetizing induct-ance is more accurate. The design and implementation methods of the compound DC system are also given. Finally, a 300W prototype is build based on TMS320F28335 and the experiment results verify the feasibility of the system.%为燃料电池车提出了一种复合直流系统方案,该方案采用 DSP 控制单个 DC/ DC 变换器实现直流系统能量的统一管理。变换器有4种工作模式,且可归纳为两种电路拓扑:串并联谐振变换器和串联谐振变换器。详细分析了串并联谐振变换器的软开关实现条件,由于考虑了变压器副边整流开关管寄生电容对死区时间内换流过程的影响,故分析得到的励磁电感限制条件更加精确。给出了该复合直流系统的设计与实现方法。最后搭建了一台基于 TMS320F28335的300W 样机,实验结果验证了该系统的可行性。

  11. Design of IR EDM System with a DSP Phase Detector①

    Institute of Scientific and Technical Information of China (English)

    LIUJianguo; WEIQingnong

    1997-01-01

    The design and realization of a new generation of infra-red electronic distance measurement(IR EDM)system are presented.A DSP(Digital Signal Process)phase detector based on high speed analog-to-digital converter and DSP technique has been designed,in order to improve the precision and reliability of IR EDM system.As a result,the EDM system developed with a DSP phase detector has a precision of 3mm in the measuring range of 2 km.

  12. Data acquisition system based on Matlab and DSP%基于Matlab与dsp的数据采集系统

    Institute of Scientific and Technical Information of China (English)

    何强; 潘宏侠; 刘平

    2013-01-01

      采用模型设计的方法,使用TI公司TMS320F28335数字信号处理芯片为核心搭建硬件电路,利用Matlab中的Embedded coder和Stateflow搭建系统模型,通过Matlab与CCS连接,进行代码的自动生成及DSP程序的调试,实现数据采集功能。%Using the method of model design,using TMS320F28335 digital signal processing chip of TI company as the core building hardware circuit,using Embedded coder and Stateflow build system model in matlab,through Matlab and CCS connection,generate code automatic and DSP program debugging,realize data acquisition function.

  13. Gesture recognition for wearable motion sensors based on DSP%基于DSP的穿戴式动作传感器的手势识别

    Institute of Scientific and Technical Information of China (English)

    赵泽彪; 常丹华

    2013-01-01

    The gesture recognition algorithms based on acceleration sensor have problems for real-time and algorithms performance, aiming at this problem, a 6-axis AMI602 gesture recognition system of motion sensors combining the acceleration and geomagnetic is proposed: in hardware, a wireless is applied to collect the data and DSP (TMS320F2812) with its strong processing ability to realize the algorithm of gesture recognition, the real time of its system identification is enhanced. In algorithms, the acceleration characteristic values to do gesture projection is put foruard, and the new acceleration characteristic is gotten, dynamic time warping (DTW) algorithm is used to match the templates, which improves the recognition rate of motioa Through the real machine verification in the DSP system, the method in the recognition rate and delay have improved significantly compared to previous methods.%针对基于加速度传感器的手势识别算法实时性的需求以及识别算法性能的问题,提出了一种集加速度、地磁信号于一体的6轴AMI602动作传感器的手势识别系统:在硬件方面,运用无线方式进行传感器数据的采集,用DSP(TMS320F2812)强大的处理能力实现手势识别算法,增强了其系统识别的实时性;在算法方面,将提取的加速度特征值做动作姿态投影,得到新的加速度特征值,运用动态时间规整(DTW)算法进行模板匹配,提高了动作识别算法的性能.经过在DSP系统上实机验证,该方法在识别率和延时上都较以往方法有显著的提高.

  14. Classical low-pass filter and real-time wavelet-based denoising technique implemented on a DSP: a comparison study

    Science.gov (United States)

    Dolabdjian, Ch.; Fadili, J.; Huertas Leyva, E.

    2002-11-01

    We have implemented a real-time numerical denoising algorithm, using the Discrete Wavelet Transform (DWT), on a TMS320C3x Digital Signal Processor (DSP). We also compared from a theoretical and practical viewpoints this post-processing approach to a more classical low-pass filter. This comparison was carried out using an ECG-type signal (ElectroCardiogram). The denoising approach is an elegant and extremely fast alternative to the classical linear filters class. It is particularly adapted to non-stationary signals such as those encountered in biological applications. The denoising allows to substantially improve detection of such signals over Fourier-based techniques. This processing step is a vital element in our acquisition chain using high sensitivity magnetic sensors. It should enhance detection of cardiac-type magnetic signals or magnetic particles in movement.

  15. Design of Digital Voltage Regulator Based on DSP%基于DSP的数字发电机调压器设计

    Institute of Scientific and Technical Information of China (English)

    管定铕; 张晓斌; 郑先成

    2011-01-01

    In order to overcome shortcomings which is brought by traditional analog voltage regulator, a DSP-based digital voltage regulator design is presented. In this paper,the hardware and software design of the voltage regulator is introduced in detail, and a tested system was developed. Experiences show that various performance of the voltage regulator meets the requirements of GJB181 A.%为了克服传统模拟调压器带来的缺点,提出了一种基于DSP的数字调压器的设计方案.介绍了硬件和软件的设计,并构建实验验证系统检测调压器的性能.实验证明该调压器的各项性能指标能够满足GJB181A的要求.

  16. The SPL-based Neutrino Super Beam

    CERN Document Server

    Baussan, E; Bobeth, C; Bouquerel, E; Caretta, O; Cupial, P; Davenne, T; Densham, C; Dracos, M; Fitton, M; Gaudiot, G; Kozien, M; Lacny, L; Lepers, B; Longhin, A; Loveridge, P; Osswald, F; Poussot, P; Rooney, M; Skoczen, B; Szybinski, B; Ustrzycka, A; Vassilopoulos, N; Wilcox, D; Wroblewski, A; Wurtz, J; Zeter, V; Zito, M

    2012-01-01

    The EUROnu Super Beam work package has studied a neutrino beam based on SPL at CERN and aimed at MEMPHYS, a large water Cherenkov detector, proposed for the Laboratoire Souterrain de Modane (Fr\\'ejus tunnel, France), with a baseline of 130 km. The aim of this proposed experiment is to study the CP violation in the neutrino sector. In the study reported here, we have developed the conceptual design of the neutrino beam, especially the target and the magnetic focusing device. Indeed, this beam present several unprecedented challenges, like the high primary proton beam power (4 MW), the high repetition rate (50 Hz) and the low energy of the protons (4.5 GeV). The design is completed by a study of all the main component of the system, starting from the transport system to guide the beam to the target up to the beam dump.

  17. 基于TMS320C6416 DSP/BIOS的FLASH引导方式的实现%Realization of Flash Bootload Mode Based on TMS320C6416 DSP/BIOS

    Institute of Scientific and Technical Information of China (English)

    张力; 夏泳; 陈志勇

    2008-01-01

    通过FLASH来引导DSP是实际应用中一种常见的应用方式,基于TMS320C6416 DSP/BIOS ,详细讨论如何配置存储区、代码段和数据段, 如何编写二次引导程序,生成复制表,以及怎样将COFF文件转换为便于FLASH 烧写的.hex文件.

  18. MATLAB Simulation of FSK Communication System and Auto-generation of DSP Code Based on DSTFT%DSTEF的FSK通信系统建模仿真及DSP代码生成

    Institute of Scientific and Technical Information of China (English)

    俞大泉; 林东

    2011-01-01

    Modeling and simulating of FSK communication system based on the DSTFT (Discrete Short-time Fourier Transform) are implemented by using MATLAB Simulink toolbox. DSP codes are generated on the MATLAB operating platform by setting the interface between MATLAB and DSP target board. Finally, the codes are compiled, linked and loaded, and then run on the DSP target board,to confirm the validity of the model built by Simulink and the feasibility of DSP codes generated directly by MATLAB model.%利用MATLAB中的Simulink工具箱对基于DSTFT(Discrete Short-Time Fourier Transform,离散短时傅里叶变换)的FSK通信系统进行建模仿真;并通过MATLAB与DSP目标板的接口设置,在MATLAB操作平台上直接产生其DSP代码程序;最后,通过编译、链接、加载并在DSP目标板运行,验证Simulink所建模型的有效性,以及由MATLAB模型直接生成DSP程序代码的可行性.

  19. 基于双DSP的信息处理机设计%Design of a signal processor based on dual DSP structure

    Institute of Scientific and Technical Information of China (English)

    王冬; 李登科

    2013-01-01

    介绍了一种基于双DSP的信息处理机设计,该信息处理机是某目标跟踪系统的重要组成部分,能够完成8路模拟信号的数模转换及预处理,并配合目标跟踪软件完成目标跟踪.处理机采用TMS320C6414作为主处理器,ADSP2187为预处理器.讲述了双DSP信息处理机的总体设计思路,预处理系统,主处理系统以及逻辑译码电路的开发设计.实验表明,该信息处理机完成了系统规定的功能,工作稳定可靠.%This paper introduces a design of signal processor based on dual DSP,the signal processor is a important part of the target tracking system,it can complete 8 analog signals digital-analog conversion and pretreatment,and with the target tracking software to complete target tracking.The processor uses TMS320C6414 as the main processor,ADSP2187 as a preprocessor.This paper describes the overall design ideas of dual DSP signal processor,pretreatment system,the main processing system as well as the design and development of a logic decoding circuit.Experiments show that,the signal processor can complete the function which required bt the system,it can stable and reliable work.

  20. Electric Vehicle Battery Management System Based on DSP%基于DSP的电动汽车电池管理系统的设计

    Institute of Scientific and Technical Information of China (English)

    何莉萍; 赵曦; 丁舟波; 冯坤; 周惦武; 高学峰

    2009-01-01

    According to the data obtained from charge/discharge experiments and on-site data from a running Electric Vehicle(EV), a battery management system has been developed on the basis of 32-bits DSP controller TMS320C2812.The functions of the system include data monitoring, State of Charge(SOC) estimation, Controller Area Network(CAN) communications, USB-based data storage and so on.This paper also proposed an improved SOC estimation method, which divides into three algorithms according to the state of batteries.In the algorithm of the dynamic discharge state, Ampere/hours method is integrated with RBF neural network, and its accuracy and practicality are validated via Matlab and Advisor simulation.%在大量充放电模拟试验和随车试验数据采集的基础上,构建了基于数据信号处理器(DSP)芯片TMS320C2812的电池管理系统,实现了数据监测、荷电状态(SOC)估计、控制局域网(CAN)通信及USB存储等功能.在SOC估计算法上,根据电池所处状态进行了分类分析,并对估算难度最大的电池动态放电状态的算法进行了仿真实验.实验结果表明,该算法对镍氢电池的SOC能进行准确预测,并具有较高的精度.

  1. Dual PWM Wind Power Grid System Based on DSP%基于DSP双PWM风力发电并网系统的研究

    Institute of Scientific and Technical Information of China (English)

    吕振; 孟祥海; 林振杨; 高爽

    2011-01-01

    The double PWM wind power grid systems theory was analyzed. The basic theory of the wind power generator system was elaborated based on DSP TMS320LF2407, while the system machine-side converter and the network-side converter were analyzed. And by controlling the inverter output, the parallel running with the grid is realized under the premise of ensuring the quality of the output power. And to ensure that the harmonic content fed into the grid should be as small as possible while still meet the power requirements. Finally, the whole system was verified by experiment, experiment results show that the dual PWM wind power grid system has good stability and reliability.%详细分析了风力发电双PWM并网系统的原理,阐述了基于DSP TMS320LF2407风力发电并网系统的基本理论,同时对系统的机侧变流器和网侧变流器进行了分析,并通过控制逆变器的输出,在保证输出电能质量的前提下实现与电网的并行运行;并且保证馈入电网的谐波含量要尽可能小的同时还要符合功率要求.最后,对整个系统进行了实验验证,实验结果表明,双PWM风力发电并网系统具有良好的稳定性和可靠性.

  2. Beam based measurement of beam position monitor electrode gains

    Directory of Open Access Journals (Sweden)

    D. L. Rubin

    2010-09-01

    Full Text Available Low emittance tuning at the Cornell Electron Storage Ring (CESR test accelerator depends on precision measurement of vertical dispersion and transverse coupling. The CESR beam position monitors (BPMs consist of four button electrodes, instrumented with electronics that allow acquisition of turn-by-turn data. The response to the beam will vary among the four electrodes due to differences in electronic gain and/or misalignment. This variation in the response of the BPM electrodes will couple real horizontal offset to apparent vertical position, and introduce spurious measurements of coupling and vertical dispersion. To alleviate this systematic effect, a beam based technique to measure the relative response of the four electrodes has been developed. With typical CESR parameters, simulations show that turn-by-turn BPM data can be used to determine electrode gains to within ∼0.1%.

  3. 基于DSP2812的无刷直流电动机控制及其MATLAB仿真%Brushless DC Motor Control based on DSP2812 and MATLAB Simulation

    Institute of Scientific and Technical Information of China (English)

    周立媛; 韩文波; 薛书飞

    2013-01-01

    采用DSP2812为控制器对无刷直流电动机的控制系统进行了硬件电路和软件程序设计.文中采用了PI转速和PI电流调节器的双闭环控制方法,实现了转速的精确控制,并建立了无刷直流电动机控制系统的数学模型.最后运用MAT-LAB/SIMULINK进行了仿真,仿真结果验证了系统的可行性.%In this paper,it adopt DSP2812 as controller for brushless direct current (DC) motor and carry through the hardware and software programming for control system.It use the dual closed-loop control of PI revolving speed and PI current regulator to achieve a precise control of revolving speed,and establish the mathematical model of the brushless DC motor control system.Finally,the results of the MATLAB / SIMULINK simulation verify the feasibility of the system.

  4. 使用DSP/BIOS开发DM 642图像融合系统驱动程序%Using DSP/BIOS in Driver Development of the Image Fusion System Based on DM 642

    Institute of Scientific and Technical Information of China (English)

    王强; 倪国强; 李江涛; 宋亚军

    2006-01-01

    描述了在自主研制的TMS320DM642图像融合系统平台上,使用实时多线程操作系统(DSP/BIOS)开发驱动程序和编写融合算法的方法和流程.综合运用了BIOS、CSL、BSL、DDK、RF5、XDIAS等技术编写设备驱动程序,使用标准的类/微型驱动程序模型开发新的视频驱动程序,实现了软件开发的模块化和层次化.在此基础上编写了图像融合程序,总结了CCS编程中使用的各项优化技术.与传统软件开发比较,基于DSP/BIOS的DSP驱动程序缩短了开发时间,增加了代码的兼容性、继承性和可移植性.

  5. DSP: a protein shape string and its profile prediction server.

    Science.gov (United States)

    Sun, Jiangming; Tang, Shengnan; Xiong, Wenwei; Cong, Peisheng; Li, Tonghua

    2012-07-01

    Many studies have demonstrated that shape string is an extremely important structure representation, since it is more complete than the classical secondary structure. The shape string provides detailed information also in the regions denoted random coil. But few services are provided for systematic analysis of protein shape string. To fill this gap, we have developed an accurate shape string predictor based on two innovative technologies: a knowledge-driven sequence alignment and a sequence shape string profile method. The performance on blind test data demonstrates that the proposed method can be used for accurate prediction of protein shape string. The DSP server provides both predicted shape string and sequence shape string profile for each query sequence. Using this information, the users can compare protein structure or display protein evolution in shape string space. The DSP server is available at both http://cheminfo.tongji.edu.cn/dsp/ and its main mirror http://chemcenter.tongji.edu.cn/dsp/.

  6. Vortex-based line beam optical tweezers

    Science.gov (United States)

    Cheng, Shubo; Tao, Shaohua

    2016-10-01

    A vortex-based line beam, which has a straight-line shape of intensity and possesses phase gradient along the line trajectory is developed and applied for optical manipulation in this paper. The intensity and phase distributions of the beam in the imaging plane of the Fourier transform are analytically studied. Simulation results show that the length of the line and phase gradient possessed by a vortex-based line beam are dependent on the topological charge and the azimuthal proportional constant. A superposition of multiple phase-only holograms with elliptical azimuthal phases can be used to generate an array of vortex-based line beams. Optical trapping with the vortex-based line beams has been implemented. Furthermore, the automatic transportation of microparticles along the line trajectory perpendicular to the optical axis is realized with an array of the beams. The generation method for the vortex-based line beam is simple. The beam would have potential applications in fields such as optical trapping, laser machining, and so on.

  7. DSP-Based Sensorless Speed Control of a Permanent Magnet Synchronous Motor using Sliding Mode Current Observer

    Directory of Open Access Journals (Sweden)

    Rachid Askour

    2014-05-01

    Full Text Available In this paper, experimental results of 3-phase permanent magnet synchronous motor (PMSM sensorless speed control are presented. To estimate the rotor position, a sliding mode current observer (SMCO was implemented. This observer estimates the back emfs of the motor in the stationary reference frame using only the measured voltages and currents of the motor. These emfs were utilized to obtain the rotor position. The speed of the motor was calculated by differentiating the rotor position angle. The stability of the proposed SMCO was verified using Lyapunov method to determine the observer gain. The saturation function was adopted in order to reduce the chattering phenomenon caused by the SMCO. A vector control method was employed to achieve the sensorless drive system. The control application was developed in C/C++ language and implemented using the Texas Instruments TMS320LF2812 digital signal processor (DSP. This new processor enables intelligent control for motors. We used to test the drive the MCK2812 which is a professional development kit available from Technosoft Company. The theoretical finding is validated with experimental results that show the effectiveness of the real-time implementation.

  8. Control linear motor with DSP

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Jeong Han

    2003-06-15

    This book consists of control linear motor with DSP, which is composed of two parts. The title of the first part is control Algorithm and software with introduction and tracking controller, drive profile on decision of motion time, floating point DSP and quantization effect, motion override Algorithm and drive profile summary, design of digital controller on design for controller structure and analysis of PID control Loop and Motor turning, design for IIR digital filter and protocol structure for communication wit host. The second part describes control hardware, which mentions Linear motor and Amplifier, motor and power supply, DSP board and interface, control of Micro Linear Stepping Motor and conclusion.

  9. 基于浮点DSP+ARM的光纤捷联/GPS组合导航计算机的设计%FOG strapdown INS/GPS integrated navigation computer based on DSP+ARM

    Institute of Scientific and Technical Information of China (English)

    王其; 徐晓苏

    2007-01-01

    介绍一种基于DSP TMS320VC33PGA和ARM系列微处理器S3C44B0X构成的光纤捷联/GPS组合导航计算机的设计,详细介绍了系统硬件结构设计、高精度数据采集电路、FPGA接口电路设计、FLASH程序引导设计以及系统软件设计.通过实验室三轴转台实验证明该系统具有实时性好、精度高、体积小的优点.

  10. 基于DSP Builder的多相滤波结构数字正交变换器设计%Design of digital orthogonal converter with multi-phase filtering structure based on DSP Builder

    Institute of Scientific and Technical Information of China (English)

    张锋; 高玉良; 张路; 罗号亮

    2015-01-01

    针对数字正交变换器传统设计方法开发周期长、不易实现的问题,给出了利用DSP Builder工具箱设计开发的方法。同时,为了校正正交变换器信号分路引起的I、Q分量时延差,对内插时延滤波器进行了设计。最后分别在Matlab/Simulink和Modelsim中对设计的系统进行了算法级仿真及功能仿真。仿真结果与理论分析一致,表明了该设计方法的正确性。与传统的用硬件描述语言实现的方法相比较,该方法简单易行,容易修改和移植,具有工程实用价值。%In view of the problems that the development cycle of traditional design method of digital orthogonal converter is longer and not easy to implement, this paper presents a method for design and development using the DSP Builder toolbox. Meanwhile, it designs an interpolation delay filter for correcting the I and Q components delay difference caused by the signal division of the orthogonal circuits. And finally, it performs the simulations of algorithm level and function on the designed system respectively over Matlab/Simulink and Modelsim. Simulation results agree with the theoretical analysis, showing the correctness of the design method. Compared with the traditional implementation method using the HDL, this proposed method is simple to implement, easy to modify and transplant, and of practical value in engineering.

  11. Study of Power Quality Monitoring System of Rural Power Grid Based on DSP + ARM%基于DSP+ARM的农村电网电能质量监测系统研究

    Institute of Scientific and Technical Information of China (English)

    杜娟; 张瑾; 刘冰; 许青松

    2011-01-01

    针对农村电网电能质量问题,设计以DSP和ARM为核心的嵌入式系统来检测农村电网的电能质量.在嵌入式Linux操作系统的软件平台上,通过QT/Embedded实现良好的人机交互界面,以TMS320VC5416数据处理器、Samsung公司的S3C2410为硬件核心,以SPI实现DSP与ARM的串口通信,并利用希尔伯特-黄变换(HHT)算法对农村电能质量进行检测,大大提高了对农村电网的用电质量监测能力,同时也为农村电网的重建和改造提供了重要依据.%According to rural power grid power quality problems, the embedded system centered on DSP and ARM is designed to detect rural power grid power quality. In the embedded Linux operating system software platform through the QT/Embedded, the friendly man-machine interface is realized, Taking TMS320VC5416 data processor and Samsung S3C2410 as the hardware core, SPI is used to achieve DSP and ARM serial port communication, and the Hilbert-Huang transform ( HHT) algorithm is used to detect the rural power grid power quality. It has greatly increased the capability of rural power grid power quality monitoring while providing an important basis for the reconstruction of rural power grid.

  12. Multicore Parallel Implementation of 2D-FFTBased on TMS320C6678 DSP

    Institute of Scientific and Technical Information of China (English)

    Wende Wu[1,2; ZhiyongXu[1

    2015-01-01

    We put forward a multicore parallel plan for 2D-FFT and implement it on TMS320C6678 DSP after we research thecharacteristics of different multicore DSP programming models and two-dimension FFT (2D-FFT). We bring the parallelcomputing capability of multicore DSP into full play and improve working efficiency of 2D-FFT. It has hugely referential valuein implementing image processing arithmetic based on 2D-FFT.

  13. A Domain Specific DSP Processor

    OpenAIRE

    Tell, Eric

    2001-01-01

    This thesis describes the design of a domain specific DSP processor. The thesis is divided into two parts. The first part gives some theoretical background, describes the different steps of the design process (both for DSP processors in general and for this project) and motivates the design decisions made for this processor. The second part is a nearly complete design specification. The intended use of the processor is as a platform for hardware acceleration units. Support for this has howe...

  14. Power Efficient Hierarchical Scheduling for DSP Transformations

    Directory of Open Access Journals (Sweden)

    P. K. Merakos

    2002-01-01

    Full Text Available In this paper, the problem of scheduling the computation of partial products in transformational Digital Signal Processing (DSP algorithms, aiming at the minimization of the switching activity in data and address buses, is addressed. The problem is stated as a hierarchical scheduling problem. Two different optimization algorithms, which are based on the Travelling Salesman Problem (TSP, are defined. The proposed optimization algorithms are independent on the target architecture and can be adapted to take into account it. Experimental results obtained from the application of the proposed algorithms in various widely used DSP transformations, like Discrete Cosine Transform (DCT and Discrete Fourier Transform (DFT, show that significant switching activity savings in data and address buses can be achieved, resulting in corresponding power savings. In addition, the differences between the two proposed methods are underlined, providing envisage for their suitable selection for implementation, in particular transformational algorithms and architectures.

  15. DSP Technology and Methods for OCT

    Science.gov (United States)

    Ali, Murtaza; Ahmad, Adeel; Boppart, Stephen A.

    Medical imaging devices are continually changing and evolving. In recent years, these devices have been evolving towards portable and handheld point-of-care systems. Innovations in the semiconductor technologies have been a major driving factor for such evolution. Today, optical coherence tomography (OCT) systems are mostly cart-based or desktop systems. Portable and hand-held OCT systems will open up new opportunities for their use. Recent advances in optics and scanning techniques have led to miniaturization of the optics used to acquire the raw data and at the same time, allow very high data acquisition rate. The signal processing chain to convert this raw acquired data into useful structural images is computationally intensive. The semiconductor industry, however, has a class of embedded processor technologies, known as digital signal processors (DSP), designed to take on such computations with very low power and size. DSP technology is a crucial enabler to create low power, low cost, handheld and portable OCT systems.

  16. DSP-Based Sensor Fault Detection and Post Fault-Tolerant Control of an Induction Motor-Based Electric Vehicle

    Directory of Open Access Journals (Sweden)

    Bekheïra Tabbache

    2012-01-01

    Full Text Available This paper deals with sensor fault detection within a reconfigurable direct torque control of an induction motor-based electric vehicle. The proposed strategy concerns current, voltage, and speed sensors faults that are detected and followed by post fault-tolerant control to allow the vehicle continuous operation. The proposed approach is validated through experiments on an induction motor drive and simulations on an electric vehicle using a European urban and extraurban driving cycle.

  17. 一种基于异构多核DSP的IEEE 802.11a接收端基带处理的研究和实现%Research and implementation of IEEE 802.11 a receiver baseband processing based on heterogeneous multi-core DSP

    Institute of Scientific and Technical Information of China (English)

    徐力; 王沁; 史少波

    2012-01-01

    现有基于异构多核DSP的IEEE 802.11 a接收端实现方法中DSP核空闲等待时间较长,不能充分体现多核DSP的高性能计算能力.结合多核DSP的特点,通过核内细粒度流水和核间粗粒度流水的方法,来提高多核DSP的执行效率,并在目标异构多核DSP上实现完整的IEEE 802.11a接收端基带处理.实验结果表明,该方法不仅能满足系统吞吐量和实时性,与类似工作相比还能保证较高的DSP核平均利用率.%Nowdays.the DSP core waiting time is longer in some IEEE 802. lla implementations based on multi-core DSP, which can not take full advantage of its high-performace computational capabilities. This paper combined the characteristics of multi-core DSP, using coarse-grained pipeline between DSP cores and fine-grained pipeline in single DSP core to enhance execution efficiency of multi-core DSP. It implemented on target heterogeneous mutli-core DSP with a complete IEEE 802. lla receiver baseband processing. The experiment show that this method not only guarantee the system throughput and real-time, but also improved the DSP core average utilization compared similar works.

  18. Design of Remote Monitoring System in Smart Home Based on DSP%基于DSP的智能家居远程监控系统的设计

    Institute of Scientific and Technical Information of China (English)

    霍银龙; 赵芙生

    2012-01-01

    针对传统智能家居系统的不足之处,提出了基于DSP的智能家居远程监控系统设计方案,并对该方案进行了具体设计.该系统由智能家居终端、控制中心、客户端三部分组成,智能家居控制中心与终端之间是基于ZigBee的无线连接方式,与客户端之间是基于GPRS和lnternet连接方式.本系统具有软硬件资源丰富,成本低,功耗小,便于扩展、升级等优点,具有一定实用价值.%Because the deficiencies exsit in the traditional smart house system, this paper puts for ward the design scheme of smart house system based on DSP and carries out its special design. The system includes smart house terminaes, smart house control centre and client terminaes. The smart house control centre is communicated with the terminaes based on the ZigBee wireless mode , and the centre with the smart house client temtinaes based on the GPRS and Internet. The system has the advantages of abundant hardware and software resourece.low cost, easy expansion, upgrade and maintenance, and practical application value.

  19. Power Failure Detector Based on DSP%基于DSP的电力故障检测仪

    Institute of Scientific and Technical Information of China (English)

    王忠勇; 于洋; 常胜; 张传宗

    2011-01-01

    针对电力系统中的污闪、雾闪和窃电现象,提出一种以DSP嵌入式系统为平台的电力故障检测系统.该系统采用GPS精确授时,利用16位高精度ADC完成数据采集.因为污闪、雾闪和窃电都必然导致输电线两端的电流的不等价现象,所以用两台检测仪在输电线两端同时对电流采集即可.最后将采集到的数据传送给上位机的电力载波检测仪系统以图像的方式显示.根据前端和后端图像的差异,可以迅速判断输电线两端是否存在故障点.现场测试表明,该系统采样精度高,速度快,工作稳定,完全可以满足对污闪、雾闪和窃电现象的检测要求.%This paper puts forward a design of power failure detector that uses DSP-embedded system as hardware platform to solve the detection of the pollution flashover, fog flashover and electricity-stealing problem. The system obtains an exact time from the GPS module, and uses a high-precision A/D converter for data acquisition. All the three problems are bound to lead the current on one side of the power transmission line not to be the same as the other, so we can do the current collection on the two ends of the transmission line simultaneously. Finally, the collected data is sent to the power carrier detector system on the host computer for image display. Comparing the image of current information on the two ends, the operators can immediately judge whether there are any faults on the transmission line exist. Filed tests show that the system is stable and the sampling precision and the speed of the system are high enough to meet the detections of the pollution flashover, fog flashover and electricity-stealing problems.

  20. Design of Driving Circuit for Injector Solenoid Valve Based on DSP%基于DSP的喷油器电磁阀驱动电路设计

    Institute of Scientific and Technical Information of China (English)

    陈远; 肖兵

    2012-01-01

    According to the relationship between the electromagnetic force and current in the practical work of diesel engine fuel injection valve, a driving Circuit based on TMS320F28035 DSP was introduced in this paper. For the purpose of improved electromagnetic valve opening and closing speed, lower power consumption and simplified circuit. The circuit drives multiple solenoid valves using the 28035DSP interior integration's comparator module and the EPWM module. The solenoid valve high side uses 80 voltage and 24 voltage double power source time sharing driving technology, uses the PWM current feedback closed -loop control technology at the low side. Results show that this driving circuit will implement the peak current of 10A and the hold current of 5A control. Current characteristics of the solenoid valve meet the injector drive requirements. Obviously has promoted solenoid valve opening and closing speed, reduced the system energy consumption.%根据柴油发动机喷油电磁阀在实际工作中电磁力与电流的关系,设计出一种基于TMS320F28035DSP的柴油机电控喷油电磁阀的驱动电路,以达到提高电磁阀开启与关闭速度、降低能耗和简化电路的目的;驱动电路利用28035DSP内部集成的比较器模块和EPWM模块实现多个电磁阀的驱动,电磁阀高端采用80V高压和24V低压双电源分时驱动技术,电磁阀低端采用电流反馈PWM调制控制技术;试验结果表明:驱动电路实现了12A峰值电流和4A保持电流的电流控制,电流波形满足电磁阀驱动特性,显著提升了电磁阀开启与关闭速度,降低了系统能耗.

  1. Site specificity of DSP-PP cleavage by BMP1.

    Science.gov (United States)

    Yang, Robert T; Lim, Glendale L; Yee, Colin T; Fuller, Robert S; Ritchie, Helena H

    2014-08-01

    Bone morphogenic protein 1 (BMP1), a metalloproteinase, is known to cleave a wide variety of extracellular matrix proteins, suggesting that a consensus substrate cleavage amino acid sequence might exist. However, while such a consensus sequence has been proposed based on P4 to P4' (i.e. the four amino acids flanking either side of the BMP1 cleavage site; P4P3P2P1|P1'P2'P3'P4') sequence homologies between two BMP1 substrates, dentin matrix protein 1 and dentin sialoprotein phosphophoryn (DSP-PP) (i.e. xMQx|DDP), no direct testing has so far been attempted. Using an Sf9 cell expression system, we have been able to produce large amounts of uncleaved DSP-PP. Point mutations introduced into this recombinant DSP-PP were then tested for their effects on DSP-PP cleavage by either Sf9 endogenous tolloid-related protein 1 (TLR-1) or by its human homolog, BMP1. Here, we have measured DSP-PP cleavage efficiencies after modifications based on P4-P4' sequence comparisons with dentin matrix protein 1, as well as for prolysyl oxidase and chordin, two other BMP1 substrates. Our results demonstrate that any mutations within or outside of the DSP-PP P4 to P4' cleavage site can block, impair or accelerate DSP-PP cleavage, and suggest that its BMP1 cleavage site is highly conserved in order to regulate its cleavage efficiency, possibly with additional assistance from its conserved exosites. Thus, BMP1 cleavage cannot be based on a consensus substrate cleavage site.

  2. LC-MS/MS analysis of diarrhetic shellfish poisoning (DSP) toxins, okadaic acid and dinophysistoxin analogues, and other lipophilic toxins.

    Science.gov (United States)

    Suzuki, Toshiyuki; Quilliam, Michael A

    2011-01-01

    Diarrhetic shellfish poisoning (DSP) is a severe gastrointestinal illness caused by consumption of shellfish contaminated with DSP toxins that are originally produced by toxic dinoflagellates. Based on their structures, DSP toxins were initially classified into three groups, okadaic acid (OA)/dinophysistoxin (DTX) analogues, pectenotoxins (PTXs), and yessotoxins (YTXs). Because PTXs and YTXs have been subsequently shown to have no diarrhetic activities, PTXs and YTXs have recently been eliminated from the definition of DSP toxins. Mouse bioassay (MBA), which is the official testing method of DSP in Japan and many countries, also detects PTXs and YTXs, and thus alternative testing methods detecting only OA/DTX analogues are required in DSP monitoring. Electrospray ionization (ESI) liquid chromatography-mass spectrometry (LC-MS) is a very powerful tool for the detection, identification and quantification of DSP and other lipophilic toxins. In the present review, application of ESI LC-MS techniques to the analysis of each toxin group is described.

  3. A software dynamic link method based on TI TMS320 DSP%一种基于TI TMS320 DSP的软件动态链接技术

    Institute of Scientific and Technical Information of China (English)

    邓伟; 许扬婧

    2012-01-01

    The concept and feature of software dynamic link method are introduced, and a software dynamic link method based on TI TM320 DSP series is proposed. The binary object code load/unload problem has been resolved by this method in a reconfigurable DSP system. The reconfigurable software system based on this method has a successful application in a multi- purpose communication system, which gives a preferable reference for other reconfigurable DSP system. It has a valuable application in multi-function equipment and unmanned equipment.%介绍了软件动态链接技术的概念和特点,提出了基于TI TMS320系列DSP的软件动态链接技术。该技术解决了可重配置的DSP系统中关于软件二进制目标代码的动态加载和卸载的问题。采用该技术的软件重配置方案已成功运用于某多功能通信系统,为基于其他系列DSP的可重构数字处理系统提供了一定的参考,在无人值守设备、多功能信号处理设备方面具有一定的应用价值。

  4. 基于DSP的无刷直流电机控制系统的设计%Design of Brushless DC Motor System Based on DSP

    Institute of Scientific and Technical Information of China (English)

    王艳; 王毓顺; 王惠; 魏萍; 陈孝富; 周瑞君

    2015-01-01

    通过分析无刷直流电机的数学模型,建立了基于DSP的无刷直流电机控制系统仿真模型.采用数字PID算法来设计控制器,通过Matlab仿真,验证了该方法的优越性,系统可以可靠地运行.仿真结果表明,采用此控制方法,系统响应快、抗扰能力强.%On the basis of brushless DC motor mathematical model analysis,the establishment of a brushless DC motor control system simulation model based on DSP.In this paper,PID control strategy is used to design the control er,through the Matlab simulation,verified the superiority of this method,the system can run reliably.The simulation results show that,by using this control method,the system response speed,strong anti disturbance ability.

  5. DSP integrated, parameterized, FPGA based cavity simulator and controller for VUV-FEL. SIMCON ver.2.1. installation and configuration procedures - User's manual

    Energy Technology Data Exchange (ETDEWEB)

    Koprek, W.; Pucyk, P.; Czarski, T.; Pozniak, K.T.; Romaniuk, R.S. [Warsaw Univ. of Technology (Poland). Inst. of Electronic Systems

    2005-07-01

    The note describes integrated system of hardware controller and simulator of the resonant superconducting, narrowband niobium cavity, originally considered for the TTF and TESLA in DESY, Hamburg (now predicted for the VUV and X-Ray FEL). The controller bases on a programmable circuit Xilinx VirtexII V3000 embedded on a PCB XtremeDSP Development Kit by Nallatech. The FPGA circuit configuration was done in the VHDL language. The internal hardware multiplication components, present in Virtex II chips, were used, to improve the floating point calculation efficiency. The implementation was achieved of a device working in the real time, according to the demands of the LLRF control system for the TESLA Test Facility. The device under consideration will be referred to as superconducting cavity (SCCav) SIMCON throughout this work. This document is intended to be used by end users and operators. It describes step by step how to install SIMCON in specific configuration, how and what software to copy to computer. There is described set of basic Matlab functions for developers of control algorithms. This paper also contains brief description how to use Matlab function of one algorithm with its graphic user panels. (orig.)

  6. DSP network control system based on RS485%基于RS485总线的DSP网络控制系统设计

    Institute of Scientific and Technical Information of China (English)

    沈文杰; 陈文清; 陈伟

    2011-01-01

    To make reliable communication between multiple industrial production data in a computer control system, and to achieve real time control, the RS485 network control system is proposed in this paper based on TMS320LF2407A. The design of DSP network control system is introduced. The hardware of field control note was designed using RS485 bus, and the detailed software implementation is described. The RS485 reliable dato communications is achieved between the PC and the bottom of the controller's. It verified their network control targets through the production site.%为了使工业生产计算机控制系统中多种数据之间有可靠通讯,满足过程实时控制的要求,提出了一种基于DSP的网络控制系统的设计方案,介绍了DSP网络控制系统的总体设计思路,运用RS485总线技术对现场控制节点进行硬件设计并对RS485通讯软件的实现进行了详细地分析,实现了上位机与底层控制器之间的RS485数据的可靠通讯,通过生产现场调试验证了网络控制指标.

  7. Design and implementation of WMGCP stack based on DSP%基于DSP的WMGCP协议栈的设计与实现

    Institute of Scientific and Technical Information of China (English)

    郭翠娟; 苗长云; 武志刚

    2011-01-01

    基于DSP技术设计实现了一种运行于局域网VoIP电话通信系统的WMGCP协议栈.采用分层结构和会话状态机设计,完成基本呼叫、群呼、全呼和扩音呼叫功能,实现WMGCP消息的构建、存储和解析,利用μC/OS-Ⅱ嵌入式实时操作系统创建WMGCP任务.实验表明该协议栈运行稳定,节省了系统资源和成本.%A DSP-based WMGCP stack running on LAN IP telephony system is implemented in this paper. The WMGCP stack adopts layered structure and session state machine, and accomplishes some functions such as individual calling, group calling, full calling, amplifying calling, storage and parse for WMGCP messages. The WMGCP task is created with u.C/OS-II embedded operating system, which shows the good stability and low cost in practice.

  8. 基于DSP的有源噪声控制系统设计%The Design of Active Noise Control System Based on DSP

    Institute of Scientific and Technical Information of China (English)

    刘姜涛

    2012-01-01

    Active noise control system based on DSP is designed.The paper gives an overall analysis of the structure of the system,and how to select components of the system.Adaptive control algorithm of control system is designed and simulated by CCS3.3.With other parameters of the system fixed,control effect of the system is analyzed by changing the filter order.As can be seen from the experimental effect,good control effect can be obtained when appropriate parameters are selected.%本文设计了基于DSP的有源消声控制系统,对系统的结构进行了整体分析,给出系统部件的选择依据,设计了控制系统的自适应控制算法,并以CCS3.3软件为仿真平台进行仿真实验,将系统中其它参数固定,改变滤波器阶数,分析系统的控制效果。从实验效果中可以看出,在选取恰当的参数时,可以取得较好的控制效果。

  9. Design and Realization of AC Sampling Based on DSP%基于DSP交流采样电路设计与实现

    Institute of Scientific and Technical Information of China (English)

    高瑜; 焦文潭

    2011-01-01

    提出了一种基于TMS320F2812DSP三相交流电路采样方法.文中给出了系统前向通道硬件电路设计及软件编程流程图.通过对转换结果的处理,可以测量出电网信号有效值、功率等数值,结果应用在继电保护、故障录波等方面.既保证检测精度义减少硬件复杂度.%This paper presents a three - phase ac sampling method based on TMS320F2812DSP, gives the system hardware circuit of prior to channel and the software programming flowchart. Through processing the conversion results , it can measure the numerical of RMS, power and so on, the results can be used in relay protection, fault wave record etc, ensuring detection accuracy also reducing the complexity of the hardware.

  10. Real-time experimental demonstrations of software reconfigurable optical OFDM transceivers utilizing DSP-based digital orthogonal filters for SDN PONs.

    Science.gov (United States)

    Duan, X; Giddings, R P; Bolea, M; Ling, Y; Cao, B; Mansoor, S; Tang, J M

    2014-08-11

    Real-time optical OFDM (OOFDM) transceivers with on-line software-controllable channel reconfigurability and transmission performance adaptability are experimentally demonstrated, for the first time, utilizing Hilbert-pair-based 32-tap digital orthogonal filters implemented in FPGAs. By making use of an 8-bit DAC/ADC operating at 2GS/s, an oversampling factor of 2 and an EML intensity modulator, the demonstrated RF conversion-free transceiver supports end-to-end real-time simultaneous adaptive transmissions, within a 1GHz signal spectrum region, of a 2.03Gb/s in-phase OOFDM channel and a 1.41Gb/s quadrature-phase OOFDM channel over a 25km SSMF IMDD system. In addition, detailed experimental explorations are also undertaken of key physical mechanisms limiting the maximum achievable transmission performance, impacts of transceiver's channel multiplexing/demultiplexing operations on the system BER performance, and the feasibility of utilizing adaptive modulation to combat impairments associated with low-complexity digital filter designs. Furthermore, experimental results indicate that the transceiver incorporating a fixed digital orthogonal filter DSP architecture can be made transparent to various signal modulation formats up to 64-QAM.

  11. Analysis and optimization of Linux remote monitoring system based on DSP%基于DSP的Linux远程监控系统设计分析与优化

    Institute of Scientific and Technical Information of China (English)

    李森; 王超

    2014-01-01

    针对当前大多数数字信号处理器在控制和内存管理方面的缺陷,本文提出一个面向网络设备的嵌入式监控模型。该模型能最大限度的发挥数字信号处理器的性能,通过DSP芯片完成网络远程监控系统的主体搭建,并在此基础上进行此DSP系统的Linux平台移植,最后对视频压缩模块和实时传输模块进行四种优化方案阐述和测试分析。%For the defects in the control and memory management of the most current digital signal processor,in this paper a network model was depicted based on embedded monitoring.The model can maximize the performance of the digital signal processor,and build the main network remote monitoring system by DSP chip,then migrate it to Linux system,we describe four plans which can optimize the performance of video compress module and real-time transmission module,the testing results show the validity of these plan.

  12. A Real-time Audio Processing System Based on DSP%一种基于DSP的音频实时处理系统

    Institute of Scientific and Technical Information of China (English)

    刘睿

    2011-01-01

    声学回声消除器一直是视频会议系统不可缺少的组件.将回声消除算法结合噪音消除和静音检测算法等,提出一种改进的实时音频处理系统方法,并在TMS320C6713B上实现,能够有效改善噪音、双工检测、非线性回声等导致自适应滤波器发散的问题.该系统在保证正常双工通话的同时,对非线性回声的抑制有着明显的改善效果.%Acoustic echo canceller has being an indispensable component of video conferencing system.An improved method of real-time audio processing system is proposed in combination with echo cancellation, noise cancellation and voice activity detection.The system based on TMS320C6713B DSP chip, and improved the problems of noise, double-talk detection,nonlinear echo and other problems leading to divergent adaptive filter.The system can ensure normal double-talk, and has significantly improved results of non-linear echo suppression.

  13. 基于数字信号处理器的雷达教学系统设计%Design of the DSP Based Radar Training System

    Institute of Scientific and Technical Information of China (English)

    谷溪; 龚少军

    2012-01-01

    Radar is one of the important navigational aids on board. Students majoring in navigation techniques are required by STCW Convention to have special training in radar operation. In view of the situation that maritime colleges usually do not have sufficient real radars for hands-on training, a DSP based radar training system is developed, which transmits radar images to computers for radar training. The system meets the requirements of the radar training course and sets a good example to colleges.%雷达是船舶重要的导航设备之一,STCW规定航海技术专业学生在校期间必须进行雷达操作的专门训练.针对航海院校真实雷达数量少训练分组率不高的现状,设计出一款基于DSP技术的雷达教学系统,实现了雷达图像的计算机传输,满足了航海院校雷达教学的需求.该系统对航海院校雷达教学具有指导意义.

  14. 基于DSP2812和CPLD的飞机交流一次配电控制器的设计%Design of AC Power Distribution Control Unit for Aircraft Based on DSP2812 and CPLD

    Institute of Scientific and Technical Information of China (English)

    孙梦楠; 董延军; 刘中秀

    2012-01-01

    利用DSP和CPLD,设计了飞机交流一次配电控制器,采用通用的嵌入式硬件和软件设计方法,构建了一个高性能的系统控制平台.系统采用CAN总线实现了APCU与供电系统处理机(PSP)和机电综合管理系统(EMS)的通信,通过RS485总线接口实现与地面维护设备的通信,通过ARINC429总线通信接口实现与交流一次配电控制装置的通信.%A high performance control platform has been built with DSP TMS320F2812 and CPLD used the method of embedded hardware and software technology. CAN bus is designed for communication between APCU and electrical management system. Control programmes can be updated through RS485 bus,and ARINC429 bus is used to communicate with AC power distribution control unit.

  15. Design of Photo-electricity Dynamic Torque Measurement System Based on DSP and FPGA%基于DSP和FPGA的光电式动态扭矩测量系统

    Institute of Scientific and Technical Information of China (English)

    弓洪玮; 周倩; 侯培国

    2012-01-01

    In order to improve the reed-time dynamic measuring ability of torque, this paper used photo-electricity multiple code-tracks technology measure torque, proposed a real-time multi-channel acquisition system based on digital signal processor (DSP) and field programmable gate array (FPGA). In order to acquire the data rapidly and accurately, this paper analyzed and compared of the multi-channel signal feature and compared the state of variation of results as the count basis through multi-channel square wave signal subdivision count cycle. The system realized logic control, count and storage by FPGA and made the received digital signal transmitted to the DSP,then DSP dealt with these signals and communicated with PC,which realized the data storage, analsis and display. This system has high speed,high accuracy and simple structure.%为了提高扭矩的动态实时测量能力,采用光电多码道技术进行扭矩测量,提出了基于DSP和现场可编程门阵列(FPGA)的多通道实时采集系统.通过多路方波信号细分计数周期,分析比较多路信号的状态变化特征并将比较结果作为计数依据,以实现对数据快速精确的采集.该系统通过FPGA实现逻辑控制、计数和存储并将接收到的数字信号传输给DSP,DSP将信号处理后传送至上位机以实现数据的存储、分析及显示.该系统采集速度快、精度高、结构简单.

  16. Realization of a real time signal processing system based on multi-core DSP%多核DSP高速实时信号处理系统设计

    Institute of Scientific and Technical Information of China (English)

    李鑫; 姜明

    2012-01-01

    介绍了基于TI公司多核定点DSP (TMS320C6474)的高速实时数字信号处理系统.系统利用FPGA作为控制单元和转接芯片,通过SRIO接口作为DSP芯片的数据输入输出接口,具有信号处理能力超高、输入输出接口简洁、以及存储能力较大的优点.在软件实现中,利用了乒乓数据吞吐,静态内存分配技术和三核软件同步机制,通过优化算法,高效地实现了三核DSP实时信号处理,计算效率达到了设计要求.在项目图像信号实时处理中得到了成功应用,取得了良好的效果.%A high-speed real-time digital signal processing system based on TI's multi-point DSP (TMS320C6474) is described. By using FPGA devices as control unit and switching chip and SRIO interface as the data input and output interfaces for DSP chip, the system has a lot of characters, including high signal processing power, simple input and output interface and huge memory capability. In the software implementation, through using optimization algorithm, including ping-pong data throughput, static memory allocation techniques and three core software synchronization mechanism, the system realize three-core DSP real time signal processing and calculating efficiency meet the design requirements. The successful application of the image signal process in a scientific research project show that it has good ability to fill the high speed digital signal process.

  17. Beam-Based Procedures for RF Guns

    CERN Document Server

    Krasilnikov, Mikhail; Grabosch, H J; Hartrott, Michael; Hui Han, Jang; Miltchev, Velizar; Oppelt, Anne; Petrosyan, Bagrat; Staykov, Lazar; Stephan, Frank

    2005-01-01

    A wide range of rf photo injector parameters has to be optimized in order to achieve an electron source performance as required for linac based high gain FELs. Some of the machine parameters can not be precisely controlled by direct measurements, whereas the tolerance on them is extremely tight. Therefore, this should be met with beam-based techniques. Procedures for beam-based alignment (BBA) of the laser on the photo cathode as well as solenoid alignment have been developed. They were applied at the Photo Injector Test facility at DESY Zeuthen (PITZ) and at the photo injector of the VUV-FEL at DESY Hamburg. A field balance of the accelerating mode in the 1 ½ cell gun cavity is one of the key beam dynamics issues of the rf gun. Since no direct field measurement in the half and full cell of the cavity is available for the PITZ gun, a beam-based technique to determine the field balance has been proposed. A beam-based rf phase monitoring procedure has been developed as well.

  18. Low-Power Embedded DSP Core for Communication Systems

    Directory of Open Access Journals (Sweden)

    Tsao Ya-Lan

    2003-01-01

    Full Text Available This paper proposes a parameterized digital signal processor (DSP core for an embedded digital signal processing system designed to achieve demodulation/synchronization with better performance and flexibility. The features of this DSP core include parameterized data path, dual MAC unit, subword MAC, and optional function-specific blocks for accelerating communication system modulation operations. This DSP core also has a low-power structure, which includes the gray-code addressing mode, pipeline sharing, and advanced hardware looping. Users can select the parameters and special functional blocks based on the character of their applications and then generating a DSP core. The DSP core has been implemented via a cell-based design method using a synthesizable Verilog code with TSMC 0.35 m SPQM and 0.25 m 1P5M library. The equivalent gate count of the core area without memory is approximately 50 k. Moreover, the maximum operating frequency of a version is 100 MHz (0.35 m and 140 MHz (0.25 m.

  19. MCNP-DSP users manual

    Energy Technology Data Exchange (ETDEWEB)

    Valentine, T.E.

    1997-01-01

    The Monte Carlo code MCNP-DSP was developed from the Los Alamos MCNP4a code to calculate the time and frequency response statistics obtained from the {sup 252}Cf-source-driven frequency analysis measurements. This code can be used to validate calculational methods and cross section data sets from subcritical experiments. This code provides a more general model for interpretation and planning of experiments for nuclear criticality safety, nuclear safeguards, and nuclear weapons identification and replaces the use of point kinetics models for interpreting the measurements. The use of MCNP-DSP extends the usefulness of this measurement method to systems with much lower neutron multiplication factors.

  20. Multiple-Beams Splitter Based on Graphene

    Directory of Open Access Journals (Sweden)

    Xiao Bing Li

    2016-01-01

    Full Text Available Due to its tunability of conductivity, graphene can be considered as a novel epsilon-near-zero (ENZ material. Based on this property, we propose a wave splitter using graphene. Simulation results show that the circular surface plasmon polariton waves excited by a point source can be transferred to narrow beams through a graphene-based wave splitter, which is formed by a polygonal contour of the ENZ graphene layer. The number of beams can be easily controlled by adjusting the shape of the polygonal ENZ graphene layer, and the operation frequency can also be chosen.

  1. Wavefront Sensing via High Speed DSP

    Science.gov (United States)

    Smith, J. Scott; Dean, Bruce

    2004-01-01

    Future light-weighted and segmented primary mirror systems require active optical control to maintain mirror positioning and figure to within nanometer tolerances. Current image-based wavefront sensing approaches rely on post-processing techniques to return an estimate of the aberrated optical wavefront with accuracies to the nanometer level. But the lag times between wavefront sensing, and then control, contributes to a significant latency in the wavefront sensing implementation. In this analysis we demonstrate accelerated image-based wavefront sensing performance using multiple digital signal processors (DSP's). The computational architecture is discussed as well as the heritage leading to the approach.

  2. DAQ System Based on LabVIEW and DSP Serial Port%基于LabVIEW与DSP串口的数据采集系统

    Institute of Scientific and Technical Information of China (English)

    杨笑鹤; 杨昊; 黄惟公

    2004-01-01

    利用DSP(Digital Signal Processor)采集数据,LabVIEW作为开发平台,二者之间通过串口实现数据通讯,开发了一套经济实用的数据采集系统,并详细介绍了软、硬件设计方案.

  3. 基于DSP系统的超分辨率图像重建技术研究%Super-Resolution Image Reconstruction Technology Based on DSP System

    Institute of Scientific and Technical Information of China (English)

    邓建青; 刘晶红; 刘铁军

    2012-01-01

    Because of the limitations of cost and size of the navigation photo-electricity equipments, it is necessary to get images or videos as clear as possible without changing the structure of navigation photo-electricity equipments. This paper introduces a method based on DSP image processing system to realize super-resolution reconstruction which realizes motion estimation by the united optimized algorithm of Fourier-Mellin and Keren firstly, and achieves super-resolution image reconstruction based on projection onto convex sets,lastly, realizes the method on DSP by optimizes the method based on the feature of DM642 without reducing the accuracy . This method improves the resolving power of the image system without increasing the size of the system structure as well as enhance the identify ability of the system. This paper has proposed to realize super-resolution reconstruction on the embedded image processing platform which the core is DM642, the resolution of camera is 720×576, and the reconstruction time decreases to 20 s from several minutes or even several ten minutes. Experiment results indicate that the detail of reconstruction image is clearer than that of the single frame interpolation image, and the average gradient and the information entropy also get improved.%由于航空光电设备造价与体积等的限制,需要在不改变航空光电设备硬件结构的前提下,获取尽可能清晰的图像或视频.文章提出了基于DSP图像处理系统的超分辨率重建方法,首先利用Fourier-Mellin变换法和Keren算法的联合优化算法进行运动估计;然后利用基于边缘保持的凸集投影简化方法进行超分辨率重建;最终结合DM642的特征,在不降低精度的前提下,对算法进行优化实现.该方法在不增加系统结构体积和成本的前提下,有效地提高了成像系统的分辨力,进而提高系统的目标识别能力.在以DM642为核心嵌入式图像处理平台中实现超分辨率重建实

  4. 基于DSP和小波变换的电压暂态扰动在线监测方法研究%Study of voltage transient disturbance on-line detection based on DSP and wavelet transform

    Institute of Scientific and Technical Information of China (English)

    王飞; 黄细霞; 张兵; 骆秀江

    2015-01-01

    A voltage disturbance detection device based on DSP2812 is designed in this paper. A method of transient voltage disturbance detection based on DSP and wavelet transform is studied. The system takes a Hall sensor and the parallel A/D con⁃verter chip as its acquisition circuit,and a kind of digital signal processing chip TMS320F2812 as its core information process⁃ing unit,by which the design of DSP and its peripheral circuit are achieved. The discrete wavelet transform(DWT)is adopted to detect transient voltage disturbance on line and realize wavelet algorithm in DSP. Software modules including the main pro⁃gram module,A/D module,interrupt module,communication module and so on were designed. Its simulation experiment was performed in Matlab to choose suitable wavelet functions and to locate disturbance position by utilizing DB4 wavelet in Matlab. The signal generator is used to produce the signal including transient voltage disturbance. The power acquisition and real⁃time analysis of transient voltage disturbance can be realized simultaneously by the strong operation ability of DSP and the effective DWT algorithm. The contrast test shows that the system has high precision,high data processing speed and perfect capability for real⁃time detection of transient voltage disturbance.%设计了一款基于DSP2812的电压暂态扰动在线检测装置,研究了基于DSP和小波变换的电压暂态扰动在线检测方法。该装置通过霍尔传感器和模数转换芯片采集电信号,以高性能数字信号处理芯片TMS320F2812为核心信息处理单元,完成了DSP及其外围电路设计。采用小波变换在线检测电压暂态扰动,并在DSP中实现了小波算法,软件还包括主程序模块、A/D采集模块、中断模块、上位机处理模块和通讯模块等设计。实验首先在Matlab中进行了仿真实验,选取合适的小波函数,利用Matlab中的DB4小波对扰动进行定位;然后再利用信号发生

  5. Pulse Wave Doppler Blood Flow Measurement System Based on DSP%基于DSP的脉冲多普勒血流测量系统

    Institute of Scientific and Technical Information of China (English)

    智再新; 陈真诚; 朱健铭

    2013-01-01

    Objective To enhance the glucose detection precision for the diagnosis and treatment of vascular diseases. Methods With DSP as the control unit, a Doppler probe with the transceiver was used to develop a blood flow measurement system. Based on Doppler effect, the system acquired ultrasonic echo signals, and then determined the blood flow rate through Doppler frequency tolerance. Results By acquiring and analyzing echo signals, the system could detect the blood flow with a desired depth. Conclusion The blood flow measurement system, with simplified circuit and enhanced precision, is valuable for the clinical diagnosis of the diabetes and the development of other portable ultrasonic devices.%目的:提高血糖无创检测的精度,以利于诊断和治疗血管疾病.方法:以DSP为控制核心,采用收发一体的多普勒探头,研制一种血流测量系统.该系统基于多普勒效应,采集超声回波信号,通过多普勒频差计算血流速度.结果:通过采集与分析回波信号,该系统可以对预定目标深度的血流进行检测.结论:该系统极大简化了电路规模,提高了检测精度,对糖尿病的临床诊断和其他便携超声仪器的研制都具有重要的实用价值.

  6. Design on Audio Signaling Processing Module Based on DSP%基于DSP的音频信令处理模块实现

    Institute of Scientific and Technical Information of China (English)

    张迎春; 倪永婧

    2012-01-01

    音频信令处理是话音通信不可缺少的处理环节,基于DSP的音频信令处理模块应用广泛。介绍了信令处理平台的硬件设计、软件设计,并提出了A律解码、数字滤波、双音多频/信号音译码、双音多频发生器、信号音发生器及2FSK发生器等各项需要解决的问题,并阐述了MCBSPs的工作条件和接口收发的时序关系。随着电话交换设备信令音的频率偏差,针对不同应用环境提出相应的解决方案。%The audio signaling processing is the essential part of voice communication, and the audio signaling processing module based on DSP has been widely applied. At the beginning of this paper, the designs of software and hardware for signaling processing platform are introduced, and then we present the problems to be solved in A-law decoding, digital filtering, dual tone multi frequency/ signal tone decoding (DTMF/STD) , dual tone multi frequency generator, signal tone generator, 2FSK generator, etc. The operation condition of McBSPs and the temporal relation of interface sending and receiving are also illustrated. With the variation of frequency offset of signal tone of telephone switch, this paper proposes the methods to improve the performance in different application environment.

  7. Design of FDM Extruder Control System Based on DSP%基于DSP的FDM挤出头控制系统设计

    Institute of Scientific and Technical Information of China (English)

    梁世盛; 王力; 珊珊; 王海勇

    2016-01-01

    为实现FDM中挤出头控制和出丝的顺畅,提出一种基于DSP的挤出头系统控制方案。该系统主要由主控模块、电机模块和温度采集控制模块组成。通过主控芯片TMS320F2812的控制,利用热敏电阻模块、温度处理芯片MAX6675和电热筒完成挤出头的温度采集和控制,然后结合电机模块和外部的机械结构,顺利将ABS材料加热并从挤出头送出。通过调节挤出头温度、电机速度等参数,并经过大量的测试证明:在系统控制下, ABS材料的挤出效果良好。%In order to realize the control of the FDM filament extrusion head and to make the silk smooth, a design scheme of ex-trusion head control system based on DSP was introduced. This control system consisted of main control module, motor control module and temperature acquisition module. The temperature acquisition and control of heating extrusion head was completed by the main con-trol chip, thermistor module, temperature processing chip MAX6675 and electric heating tube. Then combining with the motor module and external mechanical structure, the ABS material was heated and extruded from the extrusion head out smoothly. By adjusting the extrusion head temperature, motor speed and other parameters, a lot of tests prove the extrusion effect of the ABS material is perfect under the system control.

  8. 基于DSP的多通道皮肤听声器%Multi-channel Skin-hearing Aid Based on DSP

    Institute of Scientific and Technical Information of China (English)

    李建文; 付蓉

    2011-01-01

    In order to improve the ability of deaf semantic analysis, the multi-channel band-pass filtering skin-hearing aid based on Digital Signal Processing(DSP) is designed. By comparing today's hearing-aid device and latest idea of skin-hearing, it reveals that the advantages of skin-hearing rely on no residual hearing and it can solve the deaf hearing problem from the fundamental. At the same time, the voice recognition of skin-hearing is a pattern matching process. This paper focuses on the two aspects of hardware and software to present the research program. The innovation lies with using multi-channel band-pass filter technologies in traditional method of skin-hearing, and improves the capacity of voice-recognition.%为提高聋哑人辨析语义的能力,设计基于数字信号处理的多通道带通滤波皮肤听声器.通过对助听设备现状及最新皮肤听声理念的比较,揭示皮肤听声器的优势在于不依赖于人耳的任何残余听力并能从根本上解决聋人的听力问题.阐述皮肤听声的语义识别是一个模式匹配的过程,并从硬件和软件2个方面介绍其研究方案.将多通道带通滤波技术应用到传统的皮肤听声技术中,可提高皮肤听声器辨识语音的能力.

  9. Semiautomatic beam-based LHC collimator alignment

    CERN Document Server

    Valentino, Gianluca; Bruce, Roderik; Wollmann, Daniel; Sammut, Nicholas; Rossi, Adriana; Redaelli, Stefano

    2012-01-01

    Full beam-based alignment of the LHC collimation system was a time-consuming procedure (up to 28 hours) as the collimators were set up manually. A yearly alignment campaign has been sufficient for now, although in the future due to tighter tolerances this may lead to a decrease in the cleaning efficiency if machine parameters such as the beam orbit drift over time. Automating the collimator setup procedure can reduce the beam time for collimator setup and allow for more frequent alignments, therefore reducing the risk of performance degradation. This article describes the design and testing of a semiautomatic algorithm as a first step towards a fully automatic setup procedure. The parameters used to measure the accuracy and performance of the alignment are defined and determined from experimental data. A comparison of these measured parameters at 450 GeV and 3.5 TeV with manual and semiautomatic alignment is provided.

  10. Domain-Size Pooling in Local Descriptors: DSP-SIFT

    OpenAIRE

    Dong, Jingming; Soatto, Stefano

    2014-01-01

    We introduce a simple modification of local image descriptors, such as SIFT, based on pooling gradient orientations across different domain sizes, in addition to spatial locations. The resulting descriptor, which we call DSP-SIFT, outperforms other methods in wide-baseline matching benchmarks, including those based on convolutional neural networks, despite having the same dimension of SIFT and requiring no training.

  11. Brief notes in advanced DSP Fourier analysis with Matlab

    CERN Document Server

    Grigoryan, Artyom M

    2009-01-01

    Based on the authors' research in Fourier analysis, Brief Notes in Advanced DSP: Fourier Analysis with MATLAB® addresses many concepts and applications of digital signal processing (DSP). The included MATLAB® codes illustrate how to apply the ideas in practice.The book begins with the basic concept of the discrete Fourier transformation and its properties. It then describes lifting schemes, integer transformations, the discrete cosine transform, and the paired transform method for calculating the discrete Hadamard transform. The text also examines the decomposition of the 1D signal by so-calle

  12. Design and Implementation of the DSP-Based V/f Speed Control of an Induction Motor Using Intelligent Controllers

    Directory of Open Access Journals (Sweden)

    H. Rabie

    2012-06-01

    Full Text Available This paper presents experimental results of the V/f speed control for an induction motor under different operating conditions such as step changes in reference speed and the load torque . Genetic PI-based and Fuzzy-Logic-based controllers are considered. Then, the performances of these controllers are experimentally compared with each other under these different operating conditions.

  13. 基于TMS320C54XEVM板的DSP实验开发%Development of the DSP Based on TMS320C54XEVM Board

    Institute of Scientific and Technical Information of China (English)

    曾浩; 刘玲; 黄扬帆

    2004-01-01

    介绍了DSP(Digital Signal Processor)课程教学的基本现状,重点讲述用于DSP课程实验教学中的几个具体实验内容,分析这些实验内容各自的目的以及相互关系,说明这些实验内容对DSP教学的重要意义.

  14. Motion Controller of Remotely Operated Weapon Station Based on DSP%基于DSP技术的遥控武器站运动控制器

    Institute of Scientific and Technical Information of China (English)

    章百宝; 张颖

    2012-01-01

    In order to satisfy the need of the remotely operated weapon station precision servo control, this paper designs a motion controller using digital signals processor (DSP) TMS320F2812 as the core. The controller samples the sensor value by the hi-speed I/O in the DSP. The DSP sends orders to the motor. It realizes the position control and improves the accuracy of the control system. The controller is used in a certain type remotely operated weapon station. The practice shows that the motion controller is stable and reliable. It can be widely apply in the system of remotely operated weapon station.%为了满足遥控武器站控制精度要求,设计一种以数字信号处理器(digital signals processor,DSP) TMS320F2812为控制核心的运动控制器.该运动控制器通过DSP内部集成的高速I/O口对传感器位置值进行采样,由DSP控制给出指令,驱动电机运动,实现了位置控制,使控制精度大大提高,并已应用于某型号项目的遥控武器站控制系统.实践证明,该运动控制器运行稳定、可靠,可广泛应用于遥控武器站等控制系统.

  15. Design and Implementations of Reed-Solomon Encoder/Decoder Based on DSP%DSP基的Reed-Solomon编/译码器设计与实现

    Institute of Scientific and Technical Information of China (English)

    周俊峰

    2002-01-01

    本文通过对Reed-Solomon编码/译码器各种可实现方法的比较,参照项目的低速率无线通信,芯片面积最小,低功耗的要求,提出了一种DSP基的Reed-Solomon编译码器的设计方法(RS-DSP).

  16. Design on Intrinsically Safe Digital Switching Power Supply Based on DSP%基于DSP的本质安全型数字开关电源的设计

    Institute of Scientific and Technical Information of China (English)

    安琪; 曹会启

    2014-01-01

    本文对本质安全开关电源的放电特性进行了分析,以此为理论依据针对矿井易燃易爆的特殊环境设计了一种基于DSP的本质安全型数字开关电源。%The paper analyzed the discharge characteristics of intrinsically safe switching power supply. As a theoretical foundation, it helped me design digital intrinsically safe power supply based on DSP which works in mine-on explosive environment.

  17. Research on Task Download Technique of Multi-DSP Parallel System Based on Ethernet%多DSP的以太网并行系统任务下载技术研究

    Institute of Scientific and Technical Information of China (English)

    杨彦鑫; 黎英

    2012-01-01

    为了实现基于以太网的嵌入式并行系统的实时仿真应用,在分析并行仿真系统结构的基础上,根据BF548装载文件结构的特点,研究了DSP的启动方式和任务程序加载过程,提出一种基于以太网的初始化代码多重加载的下载方法.该方法可实现DSP启动后自动下载任务程序,解决了多DSP并行系统任务下载过程复杂繁琐的问题.通过实际测试,验证了该下载方法的实用性、可行性和有效性,为并行仿真应用提供了一种方便、灵活的实验手段和实现技术.%In order to achieve the real-time simulation application of embedded parallel system based on Ethernet,the DSP boot mode and the loading process are researched according to the analysis of the parallel simulation system structure and the basic characteristic of BF548 loader file structure. This paper also proposes a kind of download method based on Ethernet's initialization code multiple-load. This method can realize task program automatic download after DSP launched and solve the problem of complex download procedure of DSP parallel system. Through the actual test,the feasibility and validity of the download method have been verified,which provide a convenient and flexible experimental method and implementation technique of parallel simulation.

  18. Control system for prosthetic hand based on DSP%基于DSP的仿人形假手控制系统研究

    Institute of Scientific and Technical Information of China (English)

    张可科; 熊蔡华; 贺磊; 熊大柱

    2013-01-01

    为解决假肢手控制系统复杂等问题,将欠驱动技术应用到假肢手的机械结构设计中,整个假手由3个电机驱动,手指结构选用绳索滑轮驱动方式.开展了对机械系统原理和结构的分析,提出了基于DSP的结构简单、开发周期短、具有力反馈的运动控制系统,该控制系统用于驱动各手指动作.介绍了控制系统的硬件实现方法和软件控制流程,硬件主要包括电平转换和传感器信号处理电路,共有两种类型、11个传感器,可为假手自主抓取中的感觉反馈提供数据;软件主要涉及事件管理器、模数转换模块的应用.最后对假手中的压力传感器进行了标定,并进行了假手抓取试验.研究结果表明,基于力传感器反馈的控制策略使得假手能够实现稳定包络抓取.%Aiming at solving problems of the control system's complexity of prosthetic hands, the under-actuated technology was investigated in the mechanical design of the hand. The total hand was actuated by 3 motors, tendons and pulleys were chosen for the finger mechanisms. According to analysis of the principle and architecture of the mechanical system, methods of easy configuration, short time of development, and force feedback were established based on DSP. The function of driving the motion of the fingers was supported by the control system. The design of hardware and software of this system was given and the voltage changing and sensor processing circuit were mainly included in the hardware design. Two kinds, a sum of 11 sensors were equipped for automatic grasp control and sensory feedback. Event managers and analog-to-digital converters were applied in the software design. Force sensing resistor of the prosthetic hand was calibrated and the grasping ability was tested. The results indicate that control strategy based on the force feedback makes prosthetic hand fulfill stable envelope grasp.

  19. Optimization Methods for Image Haze Removal Based on Multi-core DSP%多核DSP图像去雾优化方法

    Institute of Scientific and Technical Information of China (English)

    白林亭; 武永卫; 谢建春; 鹏程; 刘小剑

    2015-01-01

    The Digital Signal Processor ( DSP ) is specially designed for signal processing. In recent years, the DSP has found wide application in signal processing, image processing,communication, traffic and aerospace etc. As a practical part of image processing, the image haze removal has been researched for decades. During the research and development of haze removal algorithm, the Matlab and C programming language were usually used, and were supported by DSP. Yet, the efficiency was too low by simply running the source code. To solve this problem, a novel algorithm is proposed for optimizing the algorithm and improving the processing effect. The multi-core DSP and development tool of TI Company are used for real-time optimization of C code and parallel processing. A fine optimization effect is obtained,which shows that the method can be used for processing hazy images with low resolution ratio in realtime.%数字信号处理器( DSP)专门针对信号处理而设计,以其独特的特点在信号处理、图形图像处理、通信、交通、航空航天等领域得到越来越广泛的应用。在图形图像处理领域中,图像去雾一直是研究热点,开发时多使用Matlab和C语言仿真,将其直接移植到DSP中运行效率通常较低,难以做到实时处理。针对该问题,提出一种快速有效的图像去雾算法,优化算法过程,获得更好的处理结果;利用TI公司的多核DSP和开发工具,对C代码进行实时优化和并行处理,取得很好的优化效果,能够对低分辨率进行图像去雾的实时处理。

  20. Plasma-Based Ion Beam Sources

    Energy Technology Data Exchange (ETDEWEB)

    Loeb, H. W.

    2005-07-01

    Ion beam sources cover a broad spectrum of scientific and technical applications delivering ion currents between less than 1 mA and about 100 A at acceleration voltages between 100 V and 100 kV. The ions are mostly generated by electron collisions in a gas discharge and then extracted from the discharge plasma, focused and post-accelerated by single- or multi-aperture electrode systems. Some important applications require the neutralization of the exhausted beam either by charge exchange or by admixture of electrons. In the first part of the paper, the theory of ionization by electron impact, the energy and carrier balances in the plasma, and the extraction and focusing mechanisms will be outlined. The principles of the preferred gas discharges and of the ion beam sources based on them are discussed; i.e. of the Penning, bombardment, arc, duoplasmatron, radio frequency, and microwave types. In the second part of the paper, the special requirements of the different applications are described together with the related source hardware. One distinguishes: 1. Single-aperture ion sources producing protons, heavy ions, isotope ions, etc. for particle accelerators, ion microprobes, mass spectrometers, isotope separators, etc.; quality determinative quantities are brightness, emittance, energy width, etc. 2. Broad-beam multi-aperture injector sources for fusion machines with positive or negative deuterium ions; very high beam densities, small portions of molecular ions, flat beam profiles with small divergence angles, etc. are required. 3. Broad-beam multi-aperture ion thrusters for space propulsion operated with singly charged xenon ions; high efficiencies, reliable operation, and long lifetimes are most important. Spin-offs are applied in industry for material processing. Referring to these applications, the following sources will be described in some detail: 1. Cold cathode and filament driven sources, capillary arc and plasmatron types, microwave and ECR-sources. 2

  1. Beam Instrument Development System

    Energy Technology Data Exchange (ETDEWEB)

    2016-01-08

    Beam Instrumentation Development System (BIDS) is a collection of common support libraries and modules developed during a series of Low-Level Radio Frequency (LLRF) control and timing/synchronization projects. BIDS includes a collection of Hardware Description Language (HDL) libraries and software libraries. The BIDS can be used for the development of any FPGA-based system, such as LLRF controllers. HDL code in this library is generic and supports common Digital Signal Processing (DSP) functions, FPGA-specific drivers (high-speed serial link wrappers, clock generation, etc.), ADC/DAC drivers, Ethernet MAC implementation, etc.

  2. Differential expression between "DSP-only" and DSP-PP523 transcripts in rat molar teeth.

    Science.gov (United States)

    Zhu, Ya-Qin; Song, Ryan M; Ritchie, Helena H

    2017-10-01

    To compare the expression patterns of two multiple transcripts derived from DSP-PP gene during tooth development. One is DSP-only transcript (i.e. does not encode PP) and the other is DSP-PP523 transcript, a main DSP-PP transcript. Unique antisense and sense riboprobes were generated from DSP-only and DSPPP523 cDNAs for in situ studies to examine DSP-only and DSP-PP523 transcript expression in developing molars. Paraffin-embedded sections (5-7μ m) from embryonic 20day, postnatal 2, 3 and 6days were deparaffined and hydrated. Tissues were prehybridized, then hybridized with DSP-only and DSP-PP523 anti-sense (AS) or sense (S) Digoxigenin labeled-riboprobes overnight, and washed. Anti-Digoxigenin antibodies conjugated to alkaline phosphatase were used to detect the presence of bound riboprobes by color reaction with NBT/BCIP. Stro-1 antibody was used for immunohistochemical analysis of Stro-1 protein expression in rat molars. We found that unlike the DSP-PP523 transcript, the DSP-only transcript does not express in the entire polarized mature odontoblasts but is expressed in the areas subjacent to the mature odontoblast layer. In addition, DSP-only transcript is expressed in the dental pulp. Interestingly, Stro-1 protein, a stem cell marker, was also identified in the areas subjacentto odontoblasts and in dental pulp. Differential expression of DSP-only and DSP-PP523 transcripts suggest that these two kinds of transcripts may play different roles during dentinogenesis. DSP-PP523 transcript is expressed in mature odontoblasts, which actively participates in dentin formation. DSP-only transcript might have a different function. Copyright © 2017 Elsevier Ltd. All rights reserved.

  3. Research on Remote Monitoring System of Vegetable Greenhouse Environment Based on DSP%基于DSP蔬菜大棚环境远程监测系统的研究

    Institute of Scientific and Technical Information of China (English)

    朱高中

    2016-01-01

    A remote detection system of greenhouse environment based on DSP and WiFi is designed. It takes TMS320LF2407 as the core control chip and completes the communication based on the WiFi technology,which can realize multi-channel environment monitoring function. The system consists of sensor module,DSP module,WiFi communication module and PC and so on. Through various types of sensors,the collected data is transmitted to the DSP controller for threshold judgment,and monitoring data is transferred to the host ma-chine through WiFi and wireless transmission network. The PC makes timely processing,achieving the purpose of man-machine interac-tion and remote control,successful realization of greenhouse environment remote study on monitoring. The experiment shows that the per-formance of greenhouse environment monitoring system is stable and reliable with accurate data,and has good application value and ex-tension prospects.%设计了一种基于数字信号处理器( DSP )和 WiFi 技术相结合的大棚温室环境远程检测系统。该系统以TMS320LF2407为控制核心芯片,基于WiFi技术进行通信,实现了多路环境监测的功能。系统主要由传感器采集模块、DSP信号处理模块、WiFi通信模块和PC等组成,通过各种类型的传感器将采集到的数据传给DSP控制器进行阈值的判断,并将监测的数据通过WiFi和无线传输网络传送给上位机,由上位机做出及时的处理,实现人机交互远程控制的目的,成功实现大棚环境远程监测的研究。实验结果表明,该大棚环境监测系统性能稳定可靠、数据精确,具有良好的应用价值和推广前景。

  4. DSP-based adaptive backstepping using the tracking errors for high-performance sensorless speed control of induction motor drive.

    Science.gov (United States)

    Zaafouri, Abderrahmen; Ben Regaya, Chiheb; Ben Azza, Hechmi; Châari, Abdelkader

    2016-01-01

    This paper presents a modified structure of the backstepping nonlinear control of the induction motor (IM) fitted with an adaptive backstepping speed observer. The control design is based on the backstepping technique complemented by the introduction of integral tracking errors action to improve its robustness. Unlike other research performed on backstepping control with integral action, the control law developed in this paper does not propose the increase of the number of system state so as not increase the complexity of differential equations resolution. The digital simulation and experimental results show the effectiveness of the proposed control compared to the conventional PI control. The results analysis shows the characteristic robustness of the adaptive control to disturbances of the load, the speed variation and low speed.

  5. ECU Design of GDI Aviation Piston Engines Based on DSP%缸内直喷航空活塞发动机试验ECU平台设计

    Institute of Scientific and Technical Information of China (English)

    于兵; 边文超; 张天宏; 陈伟

    2013-01-01

    目前航空活塞发动机依然是无人机的主要动力来源,为了追求更好的动力及续航能力,缸内直喷技术成为众多改进方案的首选.为了研究缸内直喷发动机的喷射规律和控制策略,设计了基于DSP的电子控制系统硬件平台.控制系统由TMS320F28335数字信号处理器、电源模块、正时模块、控制量及修正模块、驱动模块和通信模块组成.实物在回路仿真试验和台架试验表明:该控制系统能够实时监测发动机工作状态,任意调整喷油、喷气及点火的各项参数,有效控制发动机的输出功率,满足了系统设计的需要.%Aviation piston engines are still the main power source for domestic UAV recently.To obtain better performance in dynamic characteristics,fuel economy and environmental protection,GDI technology becomes the preferred selection of numerous improvement schemes.A DSP based electronic controller system platform for researching the injection regulation and control strategy of GDI Aviation piston engine was designed.The controller system was composed of TMS320F28335 digital signal processor,power module,timing module,controlled variable and correction module,drive module and communication module.Hardware-in-loop simulation experiment and bench test for the system are taken.The results showed that the system could monitor engine operation status,adjust parameters of fuel injection,air injection and ignition arbitrarily,control output power effectively,which met the requirements of the equipment well.

  6. Steering Engine Control System of Underwater Vehicle Based on DSP Technology%基于DSP的水下航行器舵机控制系统设计

    Institute of Scientific and Technical Information of China (English)

    张礴; 吕赟

    2011-01-01

    Steering engine control system is the key institution of underwater vehicle , it controls the attitude of AUV navigation by driving the rotation of rudder, and its performance directly affects the aircraft' s performance.The steering engine is mainly constituted by controller, engine, steering mechanical structure、sensors and rudder ,the controller is the most important part in steering engine system.The theory of the steering engine control system of certain underwater vehicle by designing a control system is introduced which based on the DSP technology.In order to control the steering engine, this system uses the TMS320 F2812 as the core control chip, the hardware and software design of this system and the control algorithms are also analyzed.At last a system simulation model is builted, and proved that this system has good control performance and can satisfy the requirement of steering control of underwater vahicle.%舵机是水下航行器控制系统的关键机构,它通过带动舵面的转动来控制水下航行器的航行姿态,其性能的好坏直接决定了水下航行器的性能.舵机主要由控制器、电机、减速机构、反馈电位计、舵面五部分组成,其中控制器是舵机的核心部分.介绍了某型水下航行器的舵机基本控制原理,并采用TMS320F2812芯片为核心控制器,设计一套基于DSP的舵机控制系统;同时还分析了该系统的软硬件设计方案以及相关的控制算法;最后建立了系统仿真模型.通过实验表明,此系统的控制性能好,并且体积小,可满足水下航行器舵机的控制要求.

  7. 基于DSP的三相光伏并网系统的研究%Study of the Three-phase Photovoltaic Grid Power System Based on DSP

    Institute of Scientific and Technical Information of China (English)

    吕振; 林振杨; 孟祥海; 张晓红

    2011-01-01

    According to analysis the difficulty of the capacity of the stand-alone photovoltaic system, the loss of the electric charge or discharge in the energy storage,the limited capability and the high cost of the investment , a proposal was offered that combining the control of the photovoltaic array MPPT and the compensa-ted control of the idle work which base of the theory of the instantaneous power together,so as to create a new -type of comprehensive photovoltaic grid control system. As a result,the photovoltaic system not only can provide some certain active power to the power grid, but also it can achieve the aim of compensating the harmonic current of the idle work of the power grid. By making use of the TMS320LF2407 DSP as the core control,and using the software of Matlab/Simulink and experimental to check the truth of theory and the rationality in reality by simulation.%针对独立光伏系统的容量不易确定、储能环节充放电损耗大、调节能力有限及投资成本高等缺点,提出了将光伏阵列MPPT控制与基于瞬时无功理论的无功和谐波电流补偿控制有机结合在一起的新型光伏并网综合控制策略,使光伏并网系统既能一定程度上实现电网无功和谐波电流补偿,又能向电网提供一定的有功功率.以TMS320LF2407 DSP控制器为核心控制,并利用Matlab/Simulink软件进行仿真,并且通过实验验证了理论的正确性和实际的合理性.

  8. Fault Tolerant, Radiation hard DSP Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Commercial digital signal processors (DSP) are problematic for satellite computers due to damaging space radiation effects, particularly single event upsets (SEU)...

  9. Parameters Identification of Induction Motors Based on DSP%基于DSP的感应电机参数辨识

    Institute of Scientific and Technical Information of China (English)

    刘述喜; 贺晓蓉; 雷绍兰; 李钊

    2011-01-01

    The precise motor parameters affect the quality of the motor control system seriously in high performance AC drives of induction machine. This paper introduced a identification method based on the digital control platform of induction machine, made use of the established resource, pulse voltage and a step DC current were imposed into the machine stator windings, then detecting the response of stator current or voltage, the partial parameters of the machine were obtained by the method of curve fit. The paper described the design of the hardware circuit after introducing the principle of identification for the motor parameters, the simulation and experiment research was performed finally, the results indicated the better effect.%感应电机高性能交流调速方法中,电机参数的准确性严重影响着电机控制系统的控制品质.该文基于感应电机的数字控制平台,利用自身固有资源,向电机注入脉冲电压和阶跃直流电流激励,然后检测定子电流或电压响应,通过曲线拟合的方法得到部分电机参数.在介绍原理的基础上,介绍了硬件电路的设计,最后进行了仿真和实验研究,结果表明该辨识方案具有较高的精度.

  10. 基于DSP的光纤惯性测试组件嵌入式数据采集系统%Embedded Data Acquisition System Design for Inertial Measurement Unit Consisted by FOG Based on DSP

    Institute of Scientific and Technical Information of China (English)

    樊勇华; 查峰; 李京书

    2012-01-01

    针对光纤测试组件信号输出特点,设计一种基于DSP的光纤惯性测试组件的数据采集系统,实现对光纤陀螺和加速度计输出信息、温度信息的A/D转换、采集、存储。针对光纤陀螺输出、温度以及加速度计输出等脉冲形式的信号,设计基于CPLD的脉冲信号计数电路,实现了固定时间间隔内的数据采样。针对加速度计温度输出为模拟信号的特点,基于24位的AD7738转换芯片通过DSP编程实现对加速度计温度信号AD转换和采集。设计了DSP与CPLD、上位机的外围通讯电路,通过对DSP内部存储器的编程,实现了对光纤惯性测试组件各信息的采集与测试,并将其发送给上位机进行存储、分析等处理。%To acquire the outputs of fiber optic gyros(FOG) and accelerometers and their temperature,a acquisition system is designed for the FOG inertial measurement unit(IMU) according to its data characteristic.A pulse-scaling circuit based on CPLD is designed to count the output pulses of the gyros and accelerometers,and consequently the outputs are sampled.Due to the temperature outputs of the accelerometers are analog signals,so the signals are converted to digital format using AD7738 chip and then they are acquired by DSP TMS320F28335.Finally,the communication circuit and DSP interactive program between the DSP,CPLD and test computer are designed and the data is acquired and sent to the test computer by the DSP.

  11. Implementation of EPICS based Control System for Radioisotope Beam line

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Jae-Ha; Ahn, Tae-Sung; Song, Young-Gi; Kwon, Hyeok-Jung; Cho, Yong-Sub [Korea Atomic Energy Research Institute, Gyeongju (Korea, Republic of)

    2015-10-15

    Korea Mult-purpose Accelerator Complex (KOMAC) has been operating 100 MeV proton linear accelerator . For operating 100 MeV linac, various control system has been implemented such as vacuum, power supply, RCCS and etc. KOMAC is operating two beam lines so that clients can use 100 MeV proton beam for their experiment. KOMAC sends beam to beam line and target room using two dipole magnets and several quadrupole magnets. As demand for experiments and Radius Isotope using beam is increased, another beam line is under construction and RI beam line control system is need. To synchronize with KOMAC control system, RI beam line control system is based on Experimental Physics and Industrial control System (EPICS) software. The beam is transported to RI beam line to control magnet power supply and vacuum. Implementation of RI beam line control system is presented and some preliminary results are reported. The base RI beam line control system is implemented. It can control beam direction and vacuum. Comparing archived data and current data, RI beam line and control system will be improved. In the future, scroll pump and gate control system will be implemented using programmable logic controller PLC. RI beam interlock sequence will be added to KOMAC interlock system to protect linac.

  12. Fractal zone plate beam based optical tweezers

    Science.gov (United States)

    Cheng, Shubo; Zhang, Xinyu; Ma, Wenzhuo; Tao, Shaohua

    2016-01-01

    We demonstrate optical manipulation with an optical beam generated by a fractral zone plate (FZP). The experimental results show that the FZP beam can simultaneously trap multiple particles positioned in different focal planes of the FZP beam, owing to the multiple foci and self-reconstruction property of the FZP beam. The FZP beam can also be used to construct three-dimensional optical tweezers for potential applications. PMID:27678305

  13. Design of Intelligent Remote Control Car Based on DSP%基于DSP的智能遥控小车设计

    Institute of Scientific and Technical Information of China (English)

    倪福银

    2012-01-01

    目前,智能小车的应用已经深入到国计民生的各个领域,而步进电机作为自动控制系统中的重要执行部件,其控制技术对于智能小车系统的整体性能有着决定性的作用.文中研究的是以DSP TMS320F2806为主控芯片的智能小车.通过DSP的外设与无线遥控接收模块实现小车实时控制,利用超声波传感器实现小车自动避障,利用光学传感器实现小车寻迹功能.此外通过设计人机交换模块,更易操作.经制作调试后,该小车实现遥控与自动壁障多种运行方式,功能丰富,稳定性好,可用于智能性控制实践工程中.%With the rapid development of electronics technology, a variety of intelligent car fields are more widely studied by people. It designed the intelligent car which took DSP TMS320F2806 as a core chip. It realized car' s real-time control by DSP peripherals connecting to wireless remote control receiver module, and achieved the car' s automatic obstacle avoidance by using ultrasonic sensors, also realized the car's tracing function by using optical sensors. In addition, it became easier to operate through designing human-machine exchange module. Via debugging, the system function is rich, has good stability and can be used for intelligent control practical engineering.

  14. Research on sensorless BLDC velocity control system based on DSP%基于DSP的无位置传感器BLDC速度控制

    Institute of Scientific and Technical Information of China (English)

    魏志成; 麻友良

    2012-01-01

    The control theory of sensorless BLDC is Introduced and the realization of control system is discussed. At last,the realization of the software and hardware to the sensorless BLDC on the DSP chip TMS320F2812 is described.%介绍了无位置传感器无刷直流电机的控制原理,讨论了实现该控制系统的方法,最后介绍了一种基于TMS320F2812 DSP来实现的元位置传感器无刷直流电机速度控制方法.

  15. Changes PID based on the DSP realization to stand upside down suspends control system%基于DSP实现变PID倒立摆控制系统

    Institute of Scientific and Technical Information of China (English)

    周忠海; 李磊; 张涛; 张霞

    2006-01-01

    针对传统PID(Proportional-Integral-Derivative,比例-积分-微分)控制倒立摆的算法,进行了改进,实现变比例PID控制.并介绍了基于DSP(Digital Signal Processor,数字信号处理器)控制器的直线型倒立摆控制系统的总体结构和工作原理.实物验证,算法可行,系统稳定,且DSP作为控制器有利于系统的小型化.

  16. Realization of high speed data transform between DDC and DSP based on FIFO%基于FIFO的DDC与DSP高速数据传输实现

    Institute of Scientific and Technical Information of China (English)

    吴杰; 周刚

    2008-01-01

    基于DDC和DSP的软件无线电中频信号处理方案.详细阐述了利用FIFO实现的DDC与DSP间数据传输的电路结构;分析了数据传输方式,FIFO数据的读写时序以及DSP EMIF的具体设置;根据硬件结构特点提出了设计中需要注意的问题.

  17. Dynamic Beam Based Calibration of Beam Position Monitors

    CERN Document Server

    Dehning, Bernd; Galbraith, Peter; Mugnai, G; Placidi, Massimo; Sonnemann, F; Tecker, F A; Wenninger, J

    1998-01-01

    The degree of spin polarization at LEP is strongly dependent on the knowledge of the vertical orbit. Quadrupole magnet alignment and beam position monitor (BPM) offsets are the main source of the orbi t uncertainty. The error of the orbit monitor readings can be largely reduced by calibrating the monitor relative to the adjacent quadrupole. At LEP, 16 BPM offsets can be determined in parallel durin g 40 minutes. The error of the measure offset is about 30mm. During the LEP run 1997, more than 500 measurements were made and used for the optimisation of polarization. The method of dynamic beam bas ed calibration will be explained and the results will be shown.

  18. STS-44 DSP / IUS spacecraft tilted to predeployment position in OV-104's PLB

    Science.gov (United States)

    1991-01-01

    STS-44 Defense Support Program (DSP) / Inertial Upper Stage (IUS) spacecraft, with forward airborne support equipment (ASE) payload retention latch actuator released (foreground), is raised to a 29 degree predeployment position by the ASE aft frame tilt actuator (AFTA) table in the payload bay (PLB) of Atlantis, Orbiter Vehicle (OV) 104. Underneath the DSP / IUS combination, the umbilical boom is connected to the IUS. DSP components include Infrared (IR) sensor (top), AR I, SHF Antenna, EHF Antenna, Link 2 High-Gain Antenna, star sensor, and stowed solar paddles (box-like structure around the base). The Earth's limb and the blackness of space create the backdrop for this deployment scene.

  19. 基于DSP/BIOS的多信号并行处理软件架构设计%Framework Design of Multiple Signals Synchronous Processing Software Based on DSP/BIOS

    Institute of Scientific and Technical Information of China (English)

    王敏

    2012-01-01

    Software which supports multiple signals process running synchronously is more and more important in the DSP design. It can reduce ASIC number, minimize PCB area, and decrease development period. This paper introduces a software framework based on DSP/BIOS, which not only meet this requirement but also make design faster. The code migration and arithmetic deletion or addition can be easier and more convenient with the use of the framework. This framework is being widely used and verified in many products.%利用DSP芯片设计出能够支持多类信号多路并行处理的软件,可减少外围专用算法芯片的使用,降低设计成本、缩小印制板尺寸、缩短开发周期。文中介绍了一种利用DSP/BIOS操作系统进行快速开发设计的软件架构,不仅满足此种需求,并且方便了算法的裁减扩充和程序跨平台移植,在实际应用中得到了广泛应用和验证。

  20. Wireless Environment Monitoring System Based on DSP and nRF24L01%基于DSP和nRF24L01的无线环境监测系统设计

    Institute of Scientific and Technical Information of China (English)

    郝文延; 焦明华

    2011-01-01

    设计基于DSP(Digital Signal Processor)和nRF24L01的无线环境监测系统.系统的主拉部件选用的是TMS320LF2407,无线通信模块选用的是nRF24L01.文中论述了系统各硬件模块的选择方案,给出了各部分的软件设计.实验表明,该系统可以实现对环境温度、光照强度等的无线监测.%This paper designs a wireless environmental monitoring system based on DSP and nRF24L01. TMS320LF2407 is used as the main control unit, and nRF24L01 is used as the wireless communication module. Design plans of system hardware modules are discussed , and the software designs are given. Experiment results show the system realizes the wireless monitoring of the environment temperature and light intensity.

  1. DSPACE: A New Space DSP Development

    Science.gov (United States)

    Errico, Walter; Colonna, Annamaria; Piscopiello, Giuseppe; Tosi, Pietro; Bacci, Bruno; Pii, Vincenzo; Fanucci, Luca; Saponara, Sergio; Donati, Massimiliano; Vincenzi, Alessandro; Reiter, Frederic; Nuzzolo, Francesco; Leupers, Rainer; Odendahl, Maximilian; Yakoushkin, Sergey

    2012-08-01

    The need for a next generation of European space- qualified Digital Signal Processors (DSP) is well known to the space community. DSPACE is a research project whose goal is to design and develop a new high- performance floating-point DSP core for space applications. This paper describes the objectives of the DSPACE project, its design approach, and the technical results achieved so far.

  2. Digital signal processor and its application. ; Animation processing DSP architectures. Digital signal processor to sono oyo. ; Dogazo shoriyo DSP architecture

    Energy Technology Data Exchange (ETDEWEB)

    Murakami, T.; Ohira, H. (Mitsubishi Electric Corp., Tokyo (Japan))

    1991-12-20

    A description is given on the internationally standardized animation coding system, and existing and next generation type image processing digital signal processor (DSP) architectures. The internationally standardized animation coding system stratifies images into segments of picture element, frame, and block, with each stratum given exclusive processing. A TV conference and a TV telephone conversation require a huge amount of animation image data. To process these data on a real-time basis, the current video image processing system takes a multi DSP configuration. Methods to split the loads and allocate each load fixedly to each DSP are classified into splitting the loads in the units of coding processing function, the object images, and the loads according to amounts of loads to be calculated. These splitting methods are applied to each stratum processing. The process and splitting corresponding to each stratum processing improved the efficiency. Since the method is a software-based processing, it can be applied not only to the irternationally standardized system, but also to the vector quantization system. Although the present LSI technology is not sufficiently capable to mount the architectures meeting the stratified configuration on one chip, an architecture that specializes the functions in each stratum has a possibility to serve as one chip DSP. 14 refs., 5 figs., 4 tabs.

  3. MCNP-DSP USERS MANUAL

    Energy Technology Data Exchange (ETDEWEB)

    Valentine, T.E.

    2001-01-19

    The Monte Carlo code MCNP-DSP was developed from the Los Alamos MCNP4a code to calculate the time and frequency response statistics obtained from subcritical measurements. The code can be used to simulate a variety of subcritical measurements including source-driven noise analysis, Rossi-{alpha}, pulsed source, passive frequency analysis, multiplicity, and Feynman variance measurements. This code can be used to validate Monte Carlo methods and cross section data sets with subcritical measurements and replaces the use of point kinetics models for interpreting subcritical measurements.

  4. Types for DSP Assembler Programs

    DEFF Research Database (Denmark)

    Larsen, Ken

    2006-01-01

    for reuse, and a procedure that computes point-wise vector multiplication. The latter uses a common idiom of prefetching memory resulting in out-of-bounds reading from memory. I present two extensions to the baseline type system: The first extension is a simple modification of some type rules to allow out...... the requirements of a procedure. I implement a proof-of-concept type checker for both the baseline type system and the extensions. I get good performance results on a small benchmark suite of programs representative of handwritten DSP assembler code. These empirical results are encouraging and strongly suggest...

  5. 基于DSP的CCD信号采集控制系统设计%Design of DSP-based CCD signal acquisition system

    Institute of Scientific and Technical Information of China (English)

    章顺喜

    2014-01-01

    The design process of CCD signal acquisition circuit is introduced, in which the shift pulse that the CCD internal vertical shifting register requires is produced by MCU, and the CCD level shift pulse and reset pulse are produced by TMS320LF2407A chip. The circuit of analog to digital conversion and data storage is designed after the CCD output signal, and the data transmission between DSP and FIFO is controlled by the DSP and MCU. So that the processing of CCD signal is realized and the objective is measured.%介绍了CCD信号采集电路的设计过程,该设计由单片机产生CCD内部垂直移位寄存器工作所需的转移脉冲,并由TMS320LF2407A芯片产生CCD水平移位脉冲和复位脉冲,然后在CCD输出信号之后设计了模数转换和数据存储电路,再由DSP和单片机共同控制DSP和数据存储FIFO之间的数据读取,从而可以实现DSP对CCD信号的处理,最终实现对目标的测量。

  6. Design and Implement of Double DSP Communication Based on CAN Bus Interface%基于CAN总线的双DSP通信方案设计与实现

    Institute of Scientific and Technical Information of China (English)

    邓红德; 王博栋; 吴佳楠

    2011-01-01

    In view of the problems on communication in double DSP systems, various communication methods are compared and advantages of CAN bus are also presented. The hardware and software of communication using CAN bus in DSP systems are introduced. The registers configuration of CAN is described in particular. Data are received by interrupt and stored by double buffer. The scheme is applied in an UAV flight control system which performs very well.%针对目前逐渐增多的双DSP系统中的通信问题,分析比较了各种DSP通信方案以及将CAN总线用于DSP通信中的优势;介绍了DSP中CAN通信接口的硬件和软件设计及实现,重点阐述了CAN模块的相关寄存器设置,并且采用中断接收数据和双缓冲存取数据的方法;本方案已成功运用于某无人机飞行控制系统,系统运行良好.

  7. Design of Ethernet Communication Interface Based on Multi-core DSP%基于多核DSP的以太网通信接口设计

    Institute of Scientific and Technical Information of China (English)

    焦淑红; 焦壮

    2015-01-01

    针对8核DSP TMS320C6678与外部设备进行数据通信的需求,以片上集成千兆以太网交换子系统为核心,选取芯片88E1111作为PHY设备,设计了千兆以太网通信接口的硬件电路。在嵌入式操作系统SYS/BIOS和网络开发环境NDK上,完成了以太网底层驱动和TCP/IP协议的程序设计。通过DSP与上位机进行以太网通信测试,证明了以太网接口电路硬件及软件的正确性和实用性。%For the demand of data communications between TMS320C6678 and external devices, a gigabit Eth-ernet communication interface hardware circuit is designed with on-chip Gigabit Ethernet switching subsystem as the core and 88E1111 as the PHY device.Under embedded operating system SYS/BIOS and network development envi-ronment NDK, the Ethernet underlying driver programming and TCP/IP protocol is completed.The communication tests between DSP and PC verify the correctness and practicability of the Ethernet interface circuit hardware and soft-ware.

  8. Ultrasound phase rotation beamforming on multi-core DSP.

    Science.gov (United States)

    Ma, Jieming; Karadayi, Kerem; Ali, Murtaza; Kim, Yongmin

    2014-01-01

    Phase rotation beamforming (PRBF) is a commonly-used digital receive beamforming technique. However, due to its high computational requirement, it has traditionally been supported by hardwired architectures, e.g., application-specific integrated circuits (ASICs) or more recently field-programmable gate arrays (FPGAs). In this study, we investigated the feasibility of supporting software-based PRBF on a multi-core DSP. To alleviate the high computing requirement, the analog front-end (AFE) chips integrating quadrature demodulation in addition to analog-to-digital conversion were defined and used. With these new AFE chips, only delay alignment and phase rotation need to be performed by DSP, substantially reducing the computational load. We implemented the delay alignment and phase rotation modules on a Texas Instruments C6678 DSP with 8 cores. We found it takes 200 μs to beamform 2048 samples from 64 channels using 2 cores. With 4 cores, 20 million samples can be beamformed in one second. Therefore, ADC frequencies up to 40 MHz with 2:1 decimation in AFE chips or up to 20 MHz with no decimation can be supported as long as the ADC-to-DSP I/O requirement can be met. The remaining 4 cores can work on back-end processing tasks and applications, e.g., color Doppler or ultrasound elastography. One DSP being able to handle both beamforming and back-end processing could lead to low-power and low-cost ultrasound machines, benefiting ultrasound imaging in general, particularly portable ultrasound machines.

  9. Application of diamond based beam loss monitors

    Energy Technology Data Exchange (ETDEWEB)

    Hempel, Maria [Brandenburgische Technische Univ. Cottbus (Germany); DESY, Zeuthen (Germany); CERN, Geneva (Switzerland); Baer, Tobias [CERN, Geneva (Switzerland); Hamburg Univ. (Germany); Castro Carballo, Elena Maria [DESY, Zeuthen (Germany); Lohmann, Wolfgang [Brandenburgische Technische Univ. Cottbus (Germany); DESY, Zeuthen (Germany); Schmidt, Ruediger [CERN, Geneva (Switzerland)

    2013-07-01

    The LHC has an operational stored energy of 130MJ per beam. Only a small percentage of beam losses in the LHC equipment can damage material or lead to magnet quenches. Therefore, it is important to monitor different types of beam losses, e.g. scattering on residual gas particles, UFOs, collisions and injection losses. A detailed understanding of beam loss mechanisms is necessary to reduce them and ensure save operation. Two different beam loss monitors are installed in the LHC tunnel: ionization chambers and diamond sensors. Ionization chambers trigger a beam dump if beam losses exceed a certain threshold. They have a time resolution of 40um (half LHC turn) which is not sufficient to resolve bunch-by-bunch beam losses. Diamond sensors have a nanosecond time resolution and can therefore detect bunch-by-bunch beam losses. This time resolution allows an analysis of various types of beam losses and an understanding of the mechanisms. For the first time beam loss intensities were measured bunch-by-bunch caused by different origins of losses. Beam loss measurements using diamond sensors will be presented. The results are compared to simulations and good qualitative agreement was found. The potential of diamond sensors for LHC and experiment applications are discussed.

  10. RlSC & DSP Advanced Microprocessor System Design; Sample Projects, Fall 1991

    OpenAIRE

    Fredine, John E.; Goeckel, Dennis L.; Meyer, David G.; Sailer, Stuart E.; Schmottlach, Glenn E.

    1992-01-01

    RlSC & DSP Microprocessor System Design (EE 595M) provides students with an overview of reduced instruction set (RISC) microprocessors and digital signal processing (DSP) microprocessors, with emphasis on incorporating these devices in general purpose and embedded system designs, respectively. The first half of the course emphasizes design considerations for RlSC microprocessor based computer systems; a half-semester design project focuses on design principles that could be utilized in a gene...

  11. Modeling and simulation of LHC beam-based collimator setup

    CERN Document Server

    Valentino, G; Assmann, R W; Burkart, F; Redaelli, S; Rossi, A; Lari, L

    2012-01-01

    In the 2011 Large Hadron Collider run, collimators were aligned for proton and heavy ion beams using a semiautomatic setup algorithm. The algorithm provided a reduction in the beam time required for setup, an elimination of beam dumps during setup and better reproducibility with respect to manual alignment. A collimator setup simulator was developed based on a Gaussian model of the beam distribution as well as a parametric model of the beam losses. A time-varying beam loss signal can be simulated for a given collimator movement into the beam. The simulation results and comparison to measurement data obtained during collimator setups and dedicated fills for beam halo scraping are presented. The simulator will then be used to develop a fully automatic collimator alignment algorithm.

  12. Kagome fiber based industrial laser beam delivery

    Science.gov (United States)

    Maurel, M.; Gorse, A.; Beaudou, B.; Lekiefs, Q.; Chafer, M.; Debord, B.; Gérôme, F.; Benabid, F.

    2017-02-01

    We report on a Hollow Core-Photonic Crystal Fiber (HC-PCF) based high power ultra-short pulse laser beam delivery system (GLO-BDS) that combines ease-of-use, high laser-coupling efficiency, robustness and industrial compatible cabling. The GLO-BDS comprises a pre-aligned laser-injection head, a sheath cable protected HC-PCF and a modular fiber-output head. It enables fiber-core gas loading and evacuation in a hermetic fashion. 5 m long GLO-BDS were demonstrated for Yb USP laser, Ti:Sapphire laser and frequency-doubled Yb USP laser. They all exhibit a transmission coefficient larger than 80%, and a laser output profile close to single mode (M2 <1.3).

  13. 基于DSP和CAN的高精度光电转换器研究%Study on High Precision Photoelectric Converter Based on DSP and CAN

    Institute of Scientific and Technical Information of China (English)

    王秋才; 刘志麟; 张劲涛; 武奇生

    2007-01-01

    为了满足光纤液位测量系统的高精度和分布式控制需要,提出了一种基于数字信号处理器(DSP)和局域网控制器(CAN)的高精度光电转换器核心电路模块的设计方案,并进行了工程实现.从A/D数据采集电路、数字信号处理模块及CAN总线通信三方面阐述了光电转换器的工作原理,给出了软件处理流程.实验表明,该转换器简化了系统设计,具有精度高、数据传输稳定等特点,有良好的应用前景.

  14. DSP-based controller of arc suppression winding grounding system%基于DSP的新型消弧线圈接地系统控制器

    Institute of Scientific and Technical Information of China (English)

    刘和平; 高苏州; 李纯; 杨利辉; 叶一麟

    2004-01-01

    介绍配电网新型快速可调节消弧线圈接地系统中采用TMS320F2812数字信号处理器DSP(Digital Signal Processor)构成的上位机控制器的硬件和软件结构以及实现的功能,利用DSP的高速计算能力,实时完成多路电压电流信号的快速傅里叶变换FFT(Fast Fourier Transform)运算等,提高实时处理配电系统各种信号的能力.

  15. Wavelet fast decomposition and reconstruction based on DSP%基于DSP的快速小波分解和重构

    Institute of Scientific and Technical Information of China (English)

    吴多; 程德福

    2004-01-01

    在小波变换和TI(TexasInstruments)的浮点数字信号处理器TMS320C3X的基础上,对Mallat快速算法的分解公式和重构公式分别作了详细地说明,提出并实现了利用Matlab作辅助的设计工具在TMS320C3X DSP上实现快速小波分解和快速小波重构的方法,并给出了主要的汇编代码.该方法利用DSP(Digital Signal Processor)指令集的特点,以较少的指令周期,实现了Mallat算法.实际运行结果表明,该方法满足实时处理场合的要求.

  16. 基于DSP的假手多轴运动控制系统研究%Based on DSP Multi-axis Motion Controller for a Prosthetic Hand

    Institute of Scientific and Technical Information of China (English)

    倪媛; 姜力; 张千帆; 黄海; 程树康

    2006-01-01

    为了完善缺损上肢人的假手使用功能,设计了基于数字信号处理器(DSP)的假手多轴运动控制硬件系统,实现了假手本体与电气系统的集成.该系统将DSP快速的数据处理能力和可编程逻辑器件(CPLD)逻辑功能相结合,并采用在线可编程技术实现了3个电机的伺服控制.整个硬件系统具有结构灵活紧凑、开发时间短、集成度高、可靠性好的特点.

  17. High-speed and low-power electro-optical DSP coprocessor.

    Science.gov (United States)

    Tamir, Dan E; Shaked, Natan T; Wilson, Peter J; Dolev, Shlomi

    2009-08-01

    A fast, power-efficient electro-optical vector-by-matrix multiplier (VMM) architecture is presented. Careful design of an electrical unit supporting high-speed data transfer enables this architecture to overcome bottlenecks encountered by previous VMM architectures. Based on the proposed architecture, we present an electro-optical digital signal processing (DSP) coprocessor that can achieve a significant speedup of 2-3 orders of magnitude over existing DSP technologies and execute more than 16 teraflops. We show that it is feasible to implement the system using off-the-shelf components, analyze the performance of the architecture with respect to primitive DSP operations, and detail the use of the new architecture for several DSP applications.

  18. An ultrasonic anemometer based on DSP and FPGA%基于FPGA和DSP的超声波风向风速测量系统

    Institute of Scientific and Technical Information of China (English)

    丁向辉; 李平

    2011-01-01

    本文研究了数字化超声风速测量系统,提出并实现了完整的系统设计方案.该方案的核心足基于现场可编程门阵列(FPGA)和数字信号处理器(DSP)的硬件系统架构和基于包络重心法的信号处理算法.该设计可实现超声信号的高速数据采集和复杂的信号处理算法.测试结果表明所实现的超声风速测量系统具有体积小、反应速度快、抗干扰能力强和分辨率高等优点,且具有成本优势,并保持较低的功耗.%A digital ultrasonic anemometer system is proposed in this paper.A new design scheme is studied and realized.The key elements of this new scheme are DSP and FPGA and gravity center of the envelop estimation method.The designed system supports very high sample rates and more complicated digital signal processing algorithms.Experiments show that the proposed system has a small size, a fast response speed, and a high resolution, and is more robust in noisy environments.Besides, the system has cost effective advantages while maintaining low power consumption.

  19. Methodology and Implementation on DSP of Heuristic Multiuser DS/CDMA Detectors

    Directory of Open Access Journals (Sweden)

    Alex Miyamoto Mussi

    2010-12-01

    Full Text Available The growing number of users of mobile communications networks and the scarcity of the electromagnetic spectrum make the use of diversity techniques and detection/decoding efficient, such as the use of multiple antennas at the transmitter and/or receiver, multiuser detection (MuD – Multiuser Detection, among others, have an increasingly prominent role in the telecommunications landscape. This paper presents a design methodology based on digital signal processors (DSP – Digital Signal Processor with a view to the implementation of multiuser heuristics detectors in systems DS/CDMA (Direct Sequence Code Division Multiple Access. Heuristics detection techniques result in near-optimal performance in order to approach the performance of maximum-likelihood (ML. In this work, was employed the DSP development platform called the C6713 DSK, which is based in Texas TMS320C6713 processor. The heuristics techniques proposed are based on well established algorithms in the literature. The efficiency of the algorithms implemented in DSP has been evaluated numerically by computing the measure of bit error rate (BER. Finally, the feasibility of implementation in DSP could then be verified by comparing results from multiple Monte-Carlo simulation in Matlab, with those obtained from implementation on DSP. It also demonstrates the effective increase in performance and system capacity of DS/CDMA with the use of heuristic multiuser detection techniques, implemented directly in the DSP.

  20. Simulator for beam-based LHC collimator alignment

    Science.gov (United States)

    Valentino, Gianluca; Aßmann, Ralph; Redaelli, Stefano; Sammut, Nicholas

    2014-02-01

    In the CERN Large Hadron Collider, collimators need to be set up to form a multistage hierarchy to ensure efficient multiturn cleaning of halo particles. Automatic algorithms were introduced during the first run to reduce the beam time required for beam-based setup, improve the alignment accuracy, and reduce the risk of human errors. Simulating the alignment procedure would allow for off-line tests of alignment policies and algorithms. A simulator was developed based on a diffusion beam model to generate the characteristic beam loss signal spike and decay produced when a collimator jaw touches the beam, which is observed in a beam loss monitor (BLM). Empirical models derived from the available measurement data are used to simulate the steady-state beam loss and crosstalk between multiple BLMs. The simulator design is presented, together with simulation results and comparison to measurement data.

  1. The control and communication system of 8-arm micro-resistivity scanning imaging tool based on DSP TMS320F2812%基于DSP的八臂电成像测井仪控制及通信系统

    Institute of Scientific and Technical Information of China (English)

    谭鑫; 杜辉; 王建民

    2015-01-01

    A control and communication system is designed for he 8-arm Micro-Resistivity Scanning Imaging Tool. Based on DSP TMS320F2812,the system is able to decode the downlink commands from ground ,to communicate with the other circuit modules,to control the acquisition of auxiliary data and to package and upload the logging data.The hardware design of the system takes advantage of DSP’s serial interfaces to simplify circuit structure and makes the system small enough for the narrow space of the logging tool.Meanwhile,the control processes and procedures are considered.The well logging data show that the system is reliable and could meet the demand of micro-resistivity scanning imaginglog.%研制了一种应用于八臂电成像测井仪的控制及通信系统。该系统以 TMS320F2812DSP 芯片为核心,主要功能是负责对地面系统下发命令的解码、完成测井仪器各电路模块的通信及控制、辅助数据的采集、数据打包上传等。在系统硬件设计上,充分利用 DSP 芯片的片载串行接口,简化电路结构,使之小型化、工程化,更适合于测井仪器狭小的内部空间;软件设计上充分考虑程序的控制流程和控制时序。现场实际应用结果表明,该系统性能可靠稳定,能够满足电成像测井的实际需求。

  2. 基于DSP数字化舵机无线控制系统的设计与实现%Design and Implementation of Digital Rudder Wireless Control System Based on DSP

    Institute of Scientific and Technical Information of China (English)

    杨冰; 张鼎男; 裴锐

    2014-01-01

    An implementation plan of rudder wireless control is researched and designed based on TMS320F28335 DSP chip. The paper mainly introduces the basic structure and application of each function module, analyzes the system software structure and configuration model. System using F28335 SCI interface implementation connected to the wireless communication module, complete the data transmission between DSP and PC, data by F28335 after processing by PWM module, the output pulse width modulation (PWM) signal to control the rudder's direction; Through the interface for the design of the control rudder to change the duty ratio of PWM signal, achieve to real-time changes the rotation angle of the rudder; The design not only completed the wireless control of rudder, also laid a reference for ship autopilot control system and experimental environment.%研究和设计了一种基于DSP 芯片TMS320F28335的舵机无线控制的实现方案,概述了各功能模块的基本结构及应用,分析了系统的软件结构及配置方式。系统利用F28335的SCI接口实现与无线通信模块的连接,完成了DSP与PC机之间数据传输,数据由F28335处理后通过PWM模块输出脉宽调制(PWM)信号,以控制舵机的转向;通过设计控制舵机的界面来改变PWM信号的占空比,以此来实现舵机的旋转角度进行实时变化;该设计不但完成了舵机的无线控制,还为船舶自动舵控制系统奠定了参考依据和实验环境。

  3. 基于数字信号处理器(DSP)的智能流量计仪器系统设计%Design of the Intelligent Flowmeter Instrument System Based on DSP

    Institute of Scientific and Technical Information of China (English)

    黄培

    2015-01-01

    设计了一种基于DSP的智能流量计仪器系统。它采用了先进的基于数字信号处理器的硬件平台,完成对涡街传感器输出信号的数字滤波和数字化信息处理,能够快速、准确地计算出流体的流量。。%This project has designed one kind in view of this kind of situation take digital signal processor(DSP)as the core intelligent flowmeter instrument system. It has used advanced based on the digital signal processor hardware plat-form,unifies the advanced software filter algorithm,completes to the vortex street sensor output signal digital filter and the digitization information processing,fast,calculates the fluid accurately the current capacity.

  4. Hardware Design and Algorithm Implementation of Three-Dimension Attitude Acquisition System Based on DSP%基于DSP的三维测姿系统硬件设计和算法实现

    Institute of Scientific and Technical Information of China (English)

    王永胜; 钟宜生

    2009-01-01

    For the miniature unmanned helicopter system, a three-dimension attitude acquisition system based on DSP controller is introduced, including implementation and verification of the hardware circuit and the qua-temion algorithm. The system is constituted of yaw rate gyros, filter circuits and a platform based on DSP.Through the filter circuit, the analog signals from gyros are sampled by AD channels in the platform and smoothed by digital filter, then applied to calculate the attitude data by the quatemion algorithm. The problems and corresponding solutions are stated for the design and implementation process of hardware circuits and algo-rithms. The effectiveness of the system is demonstrated by the experiment results.%对于微小型无人直升机系统,本文介绍了基于DSP的三维测姿系统的硬件电路设计和四元数解算算法的实现及验证.该系统的硬件部分由角速率陀螺、滤波电路和DSP系统板等组成.角速率陀螺输出信号经过硬件滤波后由AD通道采集,经过数字滤波后,利用四元数算法解算出姿态数据.文中提出了硬件设计和实现及解算算法实现中需要注意的问题和相应的解决方案,测试结果表明该系统是有效的.

  5. Simulation of transition radiation based beam imaging from tilted targets

    Science.gov (United States)

    Sukhikh, L. G.; Kube, G.; Potylitsyn, A. P.

    2017-03-01

    Transverse beam profile diagnostics in linear electron accelerators is usually based on direct imaging of a beam spot via visible transition radiation. In this case the fundamental resolution limit is determined by radiation diffraction in the optical system. A method to measure beam sizes beyond the diffraction limit is to perform imaging dominated by a single-particle function (SPF), i.e. when the recorded image is dominated not by the transverse beam profile but by the image function of a point source (single electron). Knowledge of the SPF for an experimental setup allows one to extract the transverse beam size from an SPF dominated image. This paper presents an approach that allows one to calculate two-dimensional SPF dominated beam images, taking into account the target inclination angle and the depth-of-field effect. In conclusion, a simple fit function for beam size determination in the case under consideration is proposed and its applicability is tested under various conditions.

  6. Design of voltage sag generator based on dual DSP and FPGA controller%基于双DSP和FPGA控制器的大功率电压暂降仪设计

    Institute of Scientific and Technical Information of China (English)

    张华赢; 李翔; 朱正国; 姚森敬; 史帅彬; 黄力鹏; 欧阳森; 曾江

    2015-01-01

    The voltage sag generator is designed based on dual digital signal processor (DSP) and field programmable logic gate array (FPGA) controller. Firstly, the main circuit of the voltage sag generator is designed. Then, the design of core unit (namely the controller) of the voltage sag generator is introduced in detail, the controller is composed of dual DSP and FPGA, and combine hardware system and software system to realize multi-function, intelligent control of voltage sag generator. Finally, the physical circuit of the voltage sag generator is set up according to the above theory, and the feasibility of the method is verified by the testing of HONKI3196.%设计了基于双数字信号处理器(DSP)和现场可编程逻辑门阵列(FPGA)架构控制器的电压暂降仪。首先,进行了电压暂降仪的主电路拓扑设计;然后对电压暂降仪的核心单元即控制器的设计进行了详细介绍,控制器采用双DSP和FPGA架构,硬件系统与软件系统相结合,实现对电压暂降仪多功能、智能化的控制;最后,按照理论设计,搭建了电压暂降仪实物电路,经过日置HONKI3196的测试,验证了本文设计的电压暂降仪的可行性。

  7. 基于DSP的交流永磁同步电动机运动控制系统研究%Research on DSP-based AC permanent magnet synchronous motor motion control system

    Institute of Scientific and Technical Information of China (English)

    李文庆; 王大伟; 丁云飞; 金蒙; 林猛

    2012-01-01

    为了提高交流永磁同步电动机运动控制系统的控制精度,讨论了基于DSP的永磁同步伺服控制系统的软硬件组成及设计方案,采用转子磁场定向矢量控制和TMS320LF2812数字信号处理器,实现了对永磁同步伺服电动机的矢量控制.采用高速、高精度的DSP芯片以及矢量控制的永磁同步电动机伺服控制系统具有良好的动态响应性能和静态性能,并具有结构紧凑、设计合理和控制灵活等优点.%In order to improve the AC permanent magnet synchronous motor control precision of the motion control system based on DSP, this paper discusses the software and hardware composition and design scheme of permanent magnet synchronous servo control system, adopts the rotor field-oriented vector control, u-sing TMS320LF2812 digital signal processor, realizes the permanent magnet synchronous servo motor vector control. Adopting high speed, high precision DSP chipset, the vector control of permanent magnet synchronous motor servo control system has good dynamic response performance and static performance, and with compact structure, reasonable design, control flexible, etc.

  8. [Multi-DSP parallel processing technique of hyperspectral RX anomaly detection].

    Science.gov (United States)

    Guo, Wen-Ji; Zeng, Xiao-Ru; Zhao, Bao-Wei; Ming, Xing; Zhang, Gui-Feng; Lü, Qun-Bo

    2014-05-01

    To satisfy the requirement of high speed, real-time and mass data storage etc. for RX anomaly detection of hyperspectral image data, the present paper proposes a solution of multi-DSP parallel processing system for hyperspectral image based on CPCI Express standard bus architecture. Hardware topological architecture of the system combines the tight coupling of four DSPs sharing data bus and memory unit with the interconnection of Link ports. On this hardware platform, by assigning parallel processing task for each DSP in consideration of the spectrum RX anomaly detection algorithm and the feature of 3D data in the spectral image, a 4DSP parallel processing technique which computes and solves the mean matrix and covariance matrix of the whole image by spatially partitioning the image is proposed. The experiment result shows that, in the case of equivalent detective effect, it can reach the time efficiency 4 times higher than single DSP process with the 4-DSP parallel processing technique of RX anomaly detection algorithm proposed by this paper, which makes a breakthrough in the constraints to the huge data image processing of DSP's internal storage capacity, meanwhile well meeting the demands of the spectral data in real-time processing.

  9. Design and DSP Implementation of Fixed-Point Systems

    Directory of Open Access Journals (Sweden)

    Martin Coors

    2002-09-01

    Full Text Available This article is an introduction to the FRIDGE design environment which supports the design and DSP implementation of fixed-point digital signal processing systems. We present the tool-supported transformation of signal processing algorithms coded in floating-point ANSI C to a fixed-point representation in SystemC. We introduce the novel approach to control and data flow analysis, which is necessary for the transformation. The design environment enables fast bit-true simulation by mapping the fixed-point algorithm to integral data types of the host machine. A speedup by a factor of 20 to 400 can be achieved compared to C++-library-based bit-true simulation. FRIDGE also provides a direct link to DSP implementation by processor specific C code generation and advanced code optimization.

  10. RECONFIGURABLE RDMA COMMUNICATION FRAMEWORK OF MULTI-DSP

    Institute of Scientific and Technical Information of China (English)

    Wang Qian; Lv Dongqiang; Zhou Feifei

    2009-01-01

    The processing speed of the communication between nodes in a parallel processor has become the major bottleneck of the processor's performance.RDMA (Remote Direct Memory Access) technology has drawn more attention recently due to its capability of transferring a larger amount of data,higher speed and reliability.4DSP(4 Digital Signal Processing)module comprised of TigerSHARC201 chip is connected by LVDS (Low Voltage Differential Signal) circuits.This paper proposes a general and reconfigurable RDMA platform and its corresponding communication protocol with all the routes linked based on the zero copy.The protocol transfers message of DSP by interrupting of DMA and is applied on massive remote image impression,which reduces memory needs and working burden of CPU.The experiment results show this platform is efficient,flexible,and expandable of being integrated to a larger scale in the next development stages.

  11. Application of DSP in the image transmission system

    Science.gov (United States)

    Gui, Feng; Wei, LinQi

    2006-05-01

    A scheme to realize static image and video code and decode based on TI DSP chip TMS320C6416 was proposed in this paper, and a reliable image transmission system was developed. According to the application demand, the software has six major modules: (1) initialization of DSP chip and other hardware; (2) video acquisition and input control program; (3) serial port communicating program; (4) RAM storage and communicating program that applies and releases the token-ring; (5) video reconstruct and output control; (6) the major parts of the software, encoding and decoding program, in which wavelet was applied first, then run length coding and Huffman coding were carried out, the image or video could had balance resolution and better visual effect by adaptive processing, in the decoding parts, the reverse operation were executed. After the system line up debugging was carried out, a satisfying result was reached: the comparatively high compression rate, preferable image quality and relatively real-time result.

  12. Design of smart meter based on AMI and DSP & ZigBee%基于AMI并采用DSP和ZigBee的智能电表的设计

    Institute of Scientific and Technical Information of China (English)

    唐旸; 杨冠鲁; 罗钧铃

    2012-01-01

    Smart meters play an important role in the gordian technique of the advanced metering Infrastructure (AMI).To achieve the goal of saving energy by electric information , a smart meter that meeting the demand of AMI was designed. Besides the function of accurately measuring, the smart meter can also make the indoor electricity network being an organic whole, which made the interacting communication and the indoor appliances control come true. In this system, the microcontroller of DSP TMS320F5402 was adopt as the central control unit, the high-precision measurement chip was used as the measurement platform, in addition, the ZigBee wireless communication technology and the external circuit were adopt, making the system become a smart client side network.Primary test indicated that this smart meter measure accurately , make power distribution automatic and the energy consumption interactive%智能电表在高级量测体系(AMI)的关键技术中占据着重要的地位。为使智能电表在精确计量电能的同时,使户内用电网络形成一个有机整体,实现双向通信和户内家电的控制,从而达到信息节能的目的,本文设计了一种能满足AMI系统需要的智能电表。介绍了智能电表的总体设计,采用DSP TMS320F5402的微控制器作中央控制单元,以高精度计量芯片作为测量平台,并配合ZigBee无线通信和外围电路实现对智能用户端的整体构建。实验表明,该表计量准确,实现了配电自动化,用电互动的要求。

  13. 基于DSP的机载伺服控制系统设计%Design of the plane-load servo control system based on DSP

    Institute of Scientific and Technical Information of China (English)

    刘光伦

    2014-01-01

    针对机载天线实时跟随头戴设备转动,提出了一种机载伺服系统的控制方案,系统以TMS320F2812 DSP 为运算核心,通过 RS-485连接绝对值光电编码器代替测速机对转台进行测速,并采用具有退积分饱和功能的数字 PID 增量型控制算法进行速度闭环控制,使系统具有了很好的动态性能和抗干扰性能。而且针对项目的实际还提出了一种先速度后位置的随动控制策略,经实际验证和测试,取得了很好的应用效果,不仅达到了系统的技术指标而且还提高了系统的鲁棒性。%In order to achieve airborne antenna rotating instantly with headset device, a control scheme of airborne servo system is proposed. TMS320F2812 DSP is the arithmetic core of the proposed scheme. Moreover, in the whole system, an absolute optical encoder, which is connected by RS-485, replaces the tachometer to measure the speed of the rotating platform. Furthermore, because of the closed-loop speed control using the digital incremental PID algorithm with the function of backward integral saturation, the system has good dynamic performance and anti-interference. In addition, considering the actual situation, an servo control scheme in which speed is controlled firstly and position secondly is presented. And the whole scheme not only achieves the technical specifications of the system, but also improves the robustness of it. After the verification and examination of the practice, nice application effectiveness is acquired.

  14. Design of laser marker digital control systems based on DSP%基于DSP的激光标记数字控制系统设计

    Institute of Scientific and Technical Information of China (English)

    赵元黎; 周建涛; 项寅

    2012-01-01

    In order to design a laser marking digital galvanometer control system, taking a digital signal processor (DSP) chip as the main processor of the digital control board, taking universal serial bus for the communication of the host computer and digital control board because of its high-speed transfer rate and hot-plug support, mark graphic data processing algorithms was completed by the high-speed DSP chip, and a complex programmable logic device(CPLD) was used to control the signal timing. For RS-485 bus can transfer differential signal, it was used to communicate between the digital galvanometer and laser. According to theoretical analysis and simulation, the rotation of digital galvanometer and laser power can be controlled with high-precision. The results show that this system can be applied for real-time, high-speed, high-precision laser marking.%为了设计激光标记数字振镜控制系统,采用数字信号处理器芯片作为数字控制板的主处理器,使用具有高传输速率和支持热插拔的通用串行总线进行上位机与数字控制板的通信;标记图形的数据处理算法由具有高速运算能力的数字信号处理器完成,复杂可编程逻辑器件芯片完成控制信号的时序控制和输出,使用传送差分信号的RS-485总线进行控制系统与数字振镜和激光器的通信,根据理论分析和参量模拟,得到了对数字振镜的转动角度和激光器功率的高精度控制.结果表明,该系统可以实现实时、高速、高精度的激光标记.

  15. Speckle-metric-optimization-based adaptive optics for laser beam projection and coherent beam combining.

    Science.gov (United States)

    Vorontsov, Mikhail; Weyrauch, Thomas; Lachinova, Svetlana; Gatz, Micah; Carhart, Gary

    2012-07-15

    Maximization of a projected laser beam's power density at a remotely located extended object (speckle target) can be achieved by using an adaptive optics (AO) technique based on sensing and optimization of the target-return speckle field's statistical characteristics, referred to here as speckle metrics (SM). SM AO was demonstrated in a target-in-the-loop coherent beam combining experiment using a bistatic laser beam projection system composed of a coherent fiber-array transmitter and a power-in-the-bucket receiver. SM sensing utilized a 50 MHz rate dithering of the projected beam that provided a stair-mode approximation of the outgoing combined beam's wavefront tip and tilt with subaperture piston phases. Fiber-integrated phase shifters were used for both the dithering and SM optimization with stochastic parallel gradient descent control.

  16. Video-based beam position monitoring at CHESS

    Science.gov (United States)

    Revesz, Peter; Pauling, Alan; Krawczyk, Thomas; Kelly, Kevin J.

    2012-10-01

    CHESS has pioneered the development of X-ray Video Beam Position Monitors (VBPMs). Unlike traditional photoelectron beam position monitors that rely on photoelectrons generated by the fringe edges of the X-ray beam, with VBPMs we collect information from the whole cross-section of the X-ray beam. VBPMs can also give real-time shape/size information. We have developed three types of VBPMs: (1) VBPMs based on helium luminescence from the intense white X-ray beam. In this case the CCD camera is viewing the luminescence from the side. (2) VBPMs based on luminescence of a thin (~50 micron) CVD diamond sheet as the white beam passes through it. The CCD camera is placed outside the beam line vacuum and views the diamond fluorescence through a viewport. (3) Scatter-based VBPMs. In this case the white X-ray beam passes through a thin graphite filter or Be window. The scattered X-rays create an image of the beam's footprint on an X-ray sensitive fluorescent screen using a slit placed outside the beam line vacuum. For all VBPMs we use relatively inexpensive 1.3 Mega-pixel CCD cameras connected via USB to a Windows host for image acquisition and analysis. The VBPM host computers are networked and provide live images of the beam and streams of data about the beam position, profile and intensity to CHESS's signal logging system and to the CHESS operator. The operational use of VBPMs showed great advantage over the traditional BPMs by providing direct visual input for the CHESS operator. The VBPM precision in most cases is on the order of ~0.1 micron. On the down side, the data acquisition frequency (50-1000ms) is inferior to the photoelectron based BPMs. In the future with the use of more expensive fast cameras we will be able create VBPMs working in the few hundreds Hz scale.

  17. SIM-DSP: A DSP-Enhanced CAD Platform for Signal Integrity Macromodeling and Simulation

    Directory of Open Access Journals (Sweden)

    Chi-Un Lei

    2014-12-01

    Full Text Available Macromodeling-Simulation process for signal integrity verifications has become necessary for the high speed circuit system design. This paper aims to introduce a “VLSI Signal Integrity Macromodeling and Simulation via Digital Signal Processing Techniques” framework (known as SIM-DSP framework, which applies digital signal processing techniques to facilitate the SI verification process in the pre-layout design phase. Core identification modules and peripheral (pre-/post-processing modules have been developed and assembled to form a verification flow. In particular, a single-step discrete cosine transform truncation (DCTT module has been developed for modeling-simulation process. In DCTT, the response modeling problem is classified as a signal compression problem, wherein the system response can be represented by a truncated set of non-pole based DCT bases, and error can be analyzed through Parseval’s theorem. Practical examples are given to show the applicability of our proposed framework.

  18. Design and Implementation Based on EtherCAT master of DSP and PowerPC%基于DSP和PowerPC的EtherCAT主站控制器设计

    Institute of Scientific and Technical Information of China (English)

    李建峰; 苏金涛

    2013-01-01

    文章介绍了EtherCAT总线的原理与相关协议,根据协议的内容给出EtherCAT总线主站设计方案,通过对PowerPC处理器MPC5200和DSP信号处理器TMS320C6455的研究,设计出以该器件为核心控制的Ethercat主站硬件平台,并完成主站协议软件在MPC5200的具体实现。%This paper shows the principle of the EtherCAT bus and the agreements. According to the contents of the agreement, the EtherCAT bus master design scheme is achieved. Through the research of the PowerPC processor MPC5200 and DSP signal processor and TMS320C6455, we design Ethercat mainstation hardware platform, and as the core of the device control and com?pile a specific implementation of the master protocol software MPC5200.

  19. A DSP-based modified slip energy recovery drive using a 12-pulse converter and shunt chopper for a speed control system of a wound rotor induction motor

    Energy Technology Data Exchange (ETDEWEB)

    Tunyasrirut, Satean; Ngamwiwit, Jongkol [Faculty of Engineering and Research Center for Communications and Information Technology, King Mongkut' s Institute of Technology Ladkrabang, Bangkok 10520 (Thailand); Kinnares, Vijit [Department of Electrical Engineering, Faculty of Engineering, King Mongkut' s Institute of Technology Ladkrabang, Bangkok 10520 (Thailand); Furuya, Tadayoshi [Department of Electronics and Control Engineering, Kitakyushu National College of Technology, Kitakyushu, Fukuoka (Japan); Yamamoto, Yoshiichi [Department of Electronic Control, Kumamoto National College of Technology, 2659-2 Suya Nishigoshi-machi Kikuchi-Gun, Kumamoto Prefecture 861-1102 (Japan)

    2008-05-15

    This paper introduces a modified slip energy recovery drive system for speed control of a wound rotor induction motor offering improvement of drive performance, particularly line power factor and overall system efficiency. A 12-pulse line commutated thyristor converter operating in an inverter mode in conjunction with an additional IGBT shunt chopper is employed to transfer slip energy back to ac mains supply via three phase transformers. This approach offers motor speed control by varying the duty cycle of the chopper instead of changing the inverter firing angle. As a consequence, supply power factor can be improved. The servo state feedback designed by linear quadratic regulator (LQR) with observer is also included in order to keep motor speed to be constant over a certain range of operating conditions by using the estimated dc link current derived from motor speed. The advantage of this technique is absence of current transducers for current feedback control loop. The overall control system is implemented on DSP, DS1104'TMS320F240 controller board. Experimental results are illustrated in order to validate performance of the proposed system. (author)

  20. Design of Voice-Recording/Playing System Based on DSP%基于DSP的语音录放系统的设计

    Institute of Scientific and Technical Information of China (English)

    史明泉

    2011-01-01

    A voice-recording/playing system is designed using TMS320VC5402. A TLC320AD50 chip is used as digital encoding and decoding module. Through an audio cable and McBSP. the signal is transferred to the DSP from computer, and then, after processing, it is transferred to the earphone or loudspeaker.%以数字信号处理器(DSP)TMS320VC5402为核心处理器,设计了一个语音录放系统。该系统采用的数字编解码模块是由TLC320AD50芯片完成的,采用音频线,通过DSP内部的多通道缓冲串口(MCBSP)将电脑中的音频信号送到DSP中,DSP再将音频信号进f:处理,通过TLC320AD50输出。最后,音频信号从耳机或外置喇叭传出。

  1. 基于FPGA与DSP的高速数字脉压的实现%Implementation of High-speed Digital Pulse Compression Based on FPGA and DSP

    Institute of Scientific and Technical Information of China (English)

    王涛; 徐晓理; 殷切

    2014-01-01

    讨论了基于现场可编程门阵列(Field Programmable Gate Array,FPGA)与数字处理器(Digital Signal Processor,DSP)实现高速数字脉压的设计方法.将数字脉压分成距离快速傅里叶变换(Fast Fourier Transform,FFT)、复乘和距离快速傅里叶逆变换(Inverse Fast Fourier Transform,IFFT)三个模块,并将这三个模块在FPGA中利用定点算法实现.在实现时,每个模块均采用流水结构,200 MHz全局时钟,使数据通过率可以达到200MSPS(200 M复数点/s).利用DSP实时生成脉压参考函数,并将其传输至FPGA中,用于信号复乘.通过对信号动态与精度的分析,基于FPGA与DSP的高速数字脉压完全可以满足系统要求,已经将其成功地应用于某型雷达的系统设计中.

  2. 基于DSP的定日镜跟踪控制系统研究%STUDY ON TRACKING CONTROL SYSTEM OF HELIOSTAT BASED ON A DSP-CONTROLLED

    Institute of Scientific and Technical Information of China (English)

    郭铁铮; 刘德有; 钱艳平; 陈强; 卞新高; 郭苏

    2010-01-01

    研制了一种用于塔式太阳能热发电站中定日镜的新型跟踪控制系统,该系统采用开-闭环结合的控制方式,以DSP2812为控制器,并针对定日镜谐波传动机构在控制过程中其参数在一定范围内具有"自相似性"的特性,系统采用了复合式分段控制算法,即:在开环时输出脉冲常量快速定位,在闭环粗调时采用增量式数字PID算法,在闭环精调时利用分形修正的PID算法,最终实现定日镜的精准跟踪.经测试表明,该系统跟踪精度优于3.5mrad,25度阶跃响应常数小于103ms,超调量小于3.2%,半振荡次数小于2次.该文主要成果已在国家863计划重点项目示范基地中经过现场测试检验.

  3. Demodulation for multi vortex beams based on composite diffraction hologram

    Science.gov (United States)

    Zhang, Weibin; Li, Yingchun; Sun, Tengfen; Shao, Wei; Zhu, Fuquan; Wang, YingYing

    2016-12-01

    While projecting a Gaussian beam onto the spatial light modulator (SLM) which has loaded a composite hologram, several vortex beams can be generated at one time. On the contrary, while projecting the corresponding vortex beam onto the hologram, the Gaussian beam can be restored, realizing the demodulation of vortex beam. In traditional optical communication systems, a hologram can only demodulate one incident vortex beam. In this paper, a vortex beam demodulation method based on composite diffraction hologram is proposed, which can demodulate several incident vortex beams with only one hologram. An experimental system is set up in this paper which achieves the generation, transmission and demodulation experiments of vortex beams with 64QAM-OFDM signals. After a series of offline processing on the demodulated Gaussian beam, constellation and bit error rates (BER) of each subcarrier for OFDM signals are acquired. The experimental results show that good system performance can be achieved with this method as the BERs of all subcarriers are under the FEC threshold.

  4. Parametric Design and Mechanical Analysis of Beams based on SINOVATION

    Science.gov (United States)

    Xu, Z. G.; Shen, W. D.; Yang, D. Y.; Liu, W. M.

    2017-07-01

    In engineering practice, engineer needs to carry out complicated calculation when the loads on the beam are complex. The processes of analysis and calculation take a lot of time and the results are unreliable. So VS2005 and ADK are used to develop a software for beams design based on the 3D CAD software SINOVATION with C ++ programming language. The software can realize the mechanical analysis and parameterized design of various types of beams and output the report of design in HTML format. Efficiency and reliability of design of beams are improved.

  5. Digital Beam Deflectors Based Partly on Liquid Crystals

    Science.gov (United States)

    Pouch, John J.; Miranda, Felix A.; Kreminska, Liubov; Pishnyak, Oleg; Golovin, Andrii; Winker, Bruce K.

    2007-01-01

    A digital beam deflector based partly on liquid crystals has been demonstrated as a prototype of a class of optical beam-steering devices that contain no mechanical actuators or solid moving parts. Such beam-steering devices could be useful in a variety of applications, including free-space optical communications, switching in fiber-optic communications, general optical switching, and optical scanning. Liquid crystals are of special interest as active materials in nonmechanical beam steerers and deflectors because of their structural flexibility, low operating voltages, and the relatively low costs of fabrication of devices that contain them.

  6. Simulation based analysis of laser beam brazing

    Science.gov (United States)

    Dobler, Michael; Wiethop, Philipp; Schmid, Daniel; Schmidt, Michael

    2016-03-01

    Laser beam brazing is a well-established joining technology in car body manufacturing with main applications in the joining of divided tailgates and the joining of roof and side panels. A key advantage of laser brazed joints is the seam's visual quality which satisfies highest requirements. However, the laser beam brazing process is very complex and process dynamics are only partially understood. In order to gain deeper knowledge of the laser beam brazing process, to determine optimal process parameters and to test process variants, a transient three-dimensional simulation model of laser beam brazing is developed. This model takes into account energy input, heat transfer as well as fluid and wetting dynamics that lead to the formation of the brazing seam. A validation of the simulation model is performed by metallographic analysis and thermocouple measurements for different parameter sets of the brazing process. These results show that the multi-physical simulation model not only can be used to gain insight into the laser brazing process but also offers the possibility of process optimization in industrial applications. The model's capabilities in determining optimal process parameters are exemplarily shown for the laser power. Small deviations in the energy input can affect the brazing results significantly. Therefore, the simulation model is used to analyze the effect of the lateral laser beam position on the energy input and the resulting brazing seam.

  7. Fault-Tolerant, Radiation-Hard DSP

    Science.gov (United States)

    Czajkowski, David

    2011-01-01

    Commercial digital signal processors (DSPs) for use in high-speed satellite computers are challenged by the damaging effects of space radiation, mainly single event upsets (SEUs) and single event functional interrupts (SEFIs). Innovations have been developed for mitigating the effects of SEUs and SEFIs, enabling the use of very-highspeed commercial DSPs with improved SEU tolerances. Time-triple modular redundancy (TTMR) is a method of applying traditional triple modular redundancy on a single processor, exploiting the VLIW (very long instruction word) class of parallel processors. TTMR improves SEU rates substantially. SEFIs are solved by a SEFI-hardened core circuit, external to the microprocessor. It monitors the health of the processor, and if a SEFI occurs, forces the processor to return to performance through a series of escalating events. TTMR and hardened-core solutions were developed for both DSPs and reconfigurable field-programmable gate arrays (FPGAs). This includes advancement of TTMR algorithms for DSPs and reconfigurable FPGAs, plus a rad-hard, hardened-core integrated circuit that services both the DSP and FPGA. Additionally, a combined DSP and FPGA board architecture was fully developed into a rad-hard engineering product. This technology enables use of commercial off-the-shelf (COTS) DSPs in computers for satellite and other space applications, allowing rapid deployment at a much lower cost. Traditional rad-hard space computers are very expensive and typically have long lead times. These computers are either based on traditional rad-hard processors, which have extremely low computational performance, or triple modular redundant (TMR) FPGA arrays, which suffer from power and complexity issues. Even more frustrating is that the TMR arrays of FPGAs require a fixed, external rad-hard voting element, thereby causing them to lose much of their reconfiguration capability and in some cases significant speed reduction. The benefits of COTS high

  8. Beam-driven, Plasma-based Particle Accelerators

    CERN Document Server

    Muggli, P

    2016-01-01

    We briefly give some of the characteristics of the beam-driven, plasma-based particle accelerator known as the plasma wakefield accelerator (PWFA). We also mention some of the major results that have been obtained since the birth of the concept. We focus on high-energy particle beams where possible.

  9. Beam-driven, Plasma-based Particle Accelerators

    CERN Document Server

    Muggli, P.

    2016-01-01

    We briefly give some of the characteristics of the beam-driven, plasma-based particle accelerator known as the plasma wakefield accelerator (PWFA). We also mention some of the major results that have been obtained since the birth of the concept. We focus on high-energy particle beams where possible.

  10. A piezoelectric vibration harvester based on clamped-guided beams

    NARCIS (Netherlands)

    Wang, Z.; Matova, S.; Elfrink, R.; Jambunathan, M.; Nooijer, C. de; Schaijk, R. van; Vullers, R.J.M.

    2012-01-01

    The paper addresses the design, modeling, fabrication and experimental results of a piezoelectric energy harvester based on clamped-guided beams. The design is featured by shorter mass displacement and higher reliability than cantilever beams. Two separate sets of capacitors allow exploiting both te

  11. Site Specificity of Cleavage of DSP-PP by BMP1

    Science.gov (United States)

    Yang, Robert T.; Lim, Glendale L.; Yee, Colin T.; Fuller, Robert S.; Ritchie, Helena H.

    2015-01-01

    Bone morphogenic protein 1 (BMP1), a metalloproteinase, is known to cleave a wide variety of extracellular matrix proteins, suggesting that a consensus substrate cleavage amino acid sequence might exist. However, while such a consensus sequence has been proposed based on P4 to P4′ (i.e., the four amino acids flanking either side of the BMP1 cleavage site; P4P3P2P1|P1′P2′P3′P4′) sequence homologies between two BMP1 substrates, dentin matrix protein 1 and dentin sialoprotein phosphophoryn (DSP-PP) (i.e., xMQx | DDP), no direct testing has so far been attempted. Using an Sf9 cell expression system, we have been able to produce large amounts of uncleaved DSP-PP,. Point mutations introduced into this recombinant DSP-PP were then tested for their affects on DSP-PP cleavage by either Sf9 endogenous tolloid-related protein 1 (TLR-1) or by its human homolog, BMP1. Here we have measured DSP-PP cleavage efficiencies after modifications based on P4-P4′ sequence comparisons with dentin matrix protein 1, as well as for prolysyl oxidase and chordin, two other BMP1 substrates. Our results demonstrate that any mutations within or outside of the DSP-PP P4 to P4′ cleavage site can block, impair or accelerate DSP-PP cleavage, and suggest that its BMP1 cleavage site is highly conserved in order to regulate its cleavage efficiency, possibly with additional assistance from its conserved exosites. Thus, BMP1 cleavage cannot be based on a consensus substrate cleavage site. PMID:25158199

  12. Automatic learning-based beam angle selection for thoracic IMRT

    Energy Technology Data Exchange (ETDEWEB)

    Amit, Guy; Marshall, Andrea [Radiation Medicine Program, Princess Margaret Cancer Centre, Toronto, Ontario M5G 2M9 (Canada); Purdie, Thomas G., E-mail: tom.purdie@rmp.uhn.ca; Jaffray, David A. [Radiation Medicine Program, Princess Margaret Cancer Centre, Toronto, Ontario M5G 2M9 (Canada); Department of Radiation Oncology, University of Toronto, Toronto, Ontario M5S 3E2 (Canada); Techna Institute, University Health Network, Toronto, Ontario M5G 1P5 (Canada); Levinshtein, Alex [Department of Computer Science, University of Toronto, Toronto, Ontario M5S 3G4 (Canada); Hope, Andrew J.; Lindsay, Patricia [Radiation Medicine Program, Princess Margaret Cancer Centre, Toronto, Ontario M5G 2M9, Canada and Department of Radiation Oncology, University of Toronto, Toronto, Ontario M5S 3E2 (Canada); Pekar, Vladimir [Philips Healthcare, Markham, Ontario L6C 2S3 (Canada)

    2015-04-15

    Purpose: The treatment of thoracic cancer using external beam radiation requires an optimal selection of the radiation beam directions to ensure effective coverage of the target volume and to avoid unnecessary treatment of normal healthy tissues. Intensity modulated radiation therapy (IMRT) planning is a lengthy process, which requires the planner to iterate between choosing beam angles, specifying dose–volume objectives and executing IMRT optimization. In thorax treatment planning, where there are no class solutions for beam placement, beam angle selection is performed manually, based on the planner’s clinical experience. The purpose of this work is to propose and study a computationally efficient framework that utilizes machine learning to automatically select treatment beam angles. Such a framework may be helpful for reducing the overall planning workload. Methods: The authors introduce an automated beam selection method, based on learning the relationships between beam angles and anatomical features. Using a large set of clinically approved IMRT plans, a random forest regression algorithm is trained to map a multitude of anatomical features into an individual beam score. An optimization scheme is then built to select and adjust the beam angles, considering the learned interbeam dependencies. The validity and quality of the automatically selected beams evaluated using the manually selected beams from the corresponding clinical plans as the ground truth. Results: The analysis included 149 clinically approved thoracic IMRT plans. For a randomly selected test subset of 27 plans, IMRT plans were generated using automatically selected beams and compared to the clinical plans. The comparison of the predicted and the clinical beam angles demonstrated a good average correspondence between the two (angular distance 16.8° ± 10°, correlation 0.75 ± 0.2). The dose distributions of the semiautomatic and clinical plans were equivalent in terms of primary target volume

  13. Beam Parameters Measurement Based On Tv Methods

    CERN Document Server

    Klimenkov, E; Milichenko, Yu; Voevodin, V

    2004-01-01

    The paper describes hardware and software used to control TV-cameras and to process TV-images of luminescent screens placed along the beam transfer lines. Industrial devices manually control the movements and focusing of the cameras. All devices are linked to PC via PCI interfaces with homemade drivers for Linux OS and provide both selection of camera and digitizing of video signal synchronized with beam. One part of software provides means to set initial parameters using PC consol. Thus an operator can choose contrast, brightness, some number of significant points on TV-image to calculate beam position and its size. Second part supports remote TV controls and data processing from Control Rooms of U-70 complex using set initial parameters. First experience and results of the method realization are discussed.

  14. Beam Loss Diagnostics Based on Pressure Measurements

    CERN Document Server

    Weinrich, U

    2003-01-01

    The GSI is operating a heavy ion synchrotron, which is currently undergoing an upgrade towards higher beam intensities. It was discovered that beam losses induce a significant pressure increase in the vacuum system. In order to detect the time constants of the pressure increase and decrease, fast total pressure measurements were put into operation. With the recently installed partial pressure diagnostics it is also possible to follow up which types of molecules are released. The presentation will focus on the different techniques applied as well as on some measurement results. The potential and difficulties of this diagnostic tool will also be discussed.

  15. First Experiences of Beam Presence Detection Based on Dedicated Beam Position Monitors

    CERN Document Server

    Jalal, A; Gasior, M; Todd, B

    2011-01-01

    High intensity particle beam injection into the LHC is only permitted when a low intensity pilot beam is already circulating in the LHC. This requirement addresses some of the risks associated with high intensity injection, and is enforced by a so-called Beam Presence Flag (BPF) system which is part of the interlock chain between the LHC and its injector complex. For the 2010 LHC run, the detection of the presence of this pilot beam was implemented using the LHC Fast Beam Current Transformer (FBCT) system. However, the primary function of the FBCTs, that is reliable measurement of beam currents, did not allow the BPF system to satisfy all quality requirements of the LHC Machine Protection System (MPS). Safety requirements associated with high intensity injections triggered the development of a dedicated system, based on Beam Position Monitors (BPM). This system was meant to work first in parallel with the FBCT BPF system and eventually replace it. At the end of 2010 and in 2011, this new BP...

  16. 头部多角度人脸快速跟踪算法DSP实现%Fast face tracking algorithm of head multi-position based on DSP

    Institute of Scientific and Technical Information of China (English)

    姜俊金; 王增才; 朱淑亮

    2012-01-01

    针对传统驾驶员疲劳检测人脸跟踪算法复杂,DSP实现时实时性不强,不能有效地实现多角度人脸跟踪的问题,提出了一种快速人脸跟踪算法.该算法通过对YCbCr肤色模型进行图像预处理、肤色检测,提取人脸区域,通过对亮度信号Y进行统计运算,判断人脸边界,再进行相似度判断,从而实现人脸区域的跟踪.实验结果表明,该方法简单、鲁棒性强,能够快速地实现彩色图像人脸多角度跟踪.%In the field of real-time human face tracking for driver fatigue detection, the classic algorithms are so complex that the DSP system can not track the face in multi-angle state quickly and exactly, so a new face tracking algorithm is presented. In YCbCr human face color model, the image is preprocessed first, then the face region is extracted through the face color detec-tion. Through calculating the brightness signal Y, the face edge can be detected. Then a symmetry similarity measure is used to check the factuality of the face tracking. In this way, the face region can be tracked Experimental results indicate that this algo-rithm is so simple and can realize the tracking of face in multi-angle of color image.

  17. 基于DSP带机械手臂履带式移动机器人%Crawler Type Mobile Robot with Mechanical Arm Based on DSP

    Institute of Scientific and Technical Information of China (English)

    邓远旺; 吴家洲; 邱玉兰; 俞志强

    2014-01-01

    Tracked mobile robots are widely used in military surveillance, anti-terrorism riot, nucleation and pollution prevention, and in other dangerous environments. The robot control system, adopting the structure of DSP embedded servo control system and remote control/semi-autonomous work style, making it work more practi-cal. The embedded control system ensures light weight, small volume, good real-time, and high reliability of the robot. The robot facilitates with a multifunctional mechanical arm, crawler mobile platform, and can realize scene video real-time transmission, and remote control.%履带式移动机器人在军事侦察、反恐防暴、防核化及污染等危险与恶劣环境作业中有着广阔的应用。本机器人控制系统采用了DSP结构的嵌入式伺服控制系统以及遥控/半自主的工作方式,使得机器人工作更具实用性,而嵌入式控制系统则保证了控制系统重量轻、体积小、实时性好、可靠性高的要求。机器人带有多功能机械手臂,现场视频实时传输,履带式移动平台和远程控制相结合。

  18. Design and Implement of System the Electromagnetic Launcher Based on DSP%基于DSP电磁轨道炮控制系统设计与实现

    Institute of Scientific and Technical Information of China (English)

    牛颖蓓

    2012-01-01

    In order to achieve autocontroL This report designs hardware and software about control system of electromagnetism rail gun with corresponding data analysis during emitting. The system adopts time sequence control mode of synchronization triggering and collects discharging current waves. Then this report analyzes the whole system performance with comparisons between electromagnetism rail guns with different lengths. The result shows that with different charging voltage the electromagnetism rail is longer and the discharging pulse is wider, the system efficiency is better. The system with DSP autocontrol has high response speed, high anti-jamming and high accuracy of test data.%在电磁轨道炮发射过程中,为了实现自动控制并结合相应数据分析电磁发射过程中各系统的运行状态和整体系统性能;从硬件和软件两个部分设计实现了电磁轨道炮控制系统,采用同步触发时序控制方式,进行放电电流波形采集;通过对比轨道炮的不同长度分析整个系统性能;实验结果表明,电磁轨道炮充电电压变化时,电磁轨道越长,放电脉宽增加,系统的整体效率得到提高;采用DSP控制系统对电磁轨道炮进行自动控制,具有反应速度快、抗干扰能力强、试验数据精度高等优点.

  19. Vortex beam based more stable annular laser guide star

    Science.gov (United States)

    Luo, Ruiyao; Cui, Wenda; Li, Lei; Sun, Quan; He, Yulong; Wang, Hongyan; Ning, Yu; Xu, Xiaojun

    2016-11-01

    We present an annular laser guide star (LGS) concept for large ground-based telescopes in this paper. The more stable annular LGS is generated by turbulence-resisted vortex beam. In the uplink, a vortex beam tends to wander more slightly than a Gaussian beam does in atmospheric turbulence. This may enable an annular LGS to wander more slightly than a traditional Gaussian beam generated LGS does, which would ease the burden of uplink tip-tilt mirror and benefit a dynamical closed-loop adaptive optics system. We conducted numerical simulation to validate the feasibility of this concept. And we have gotten 31% reduced variance of spot wandering of annular LGS. Besides, we set up a spatial light modulator based laser guide star simulator for beam propagation in turbulent atmosphere to experimentally test the annular LGS concept. Preliminary experimental results are given. To the best of our knowledge, it is the first time this concept is formulated.

  20. An Electron Beam Profile Instrument Based on FBGs

    Directory of Open Access Journals (Sweden)

    Dan Sporea

    2014-08-01

    Full Text Available Along with the dose rate and the total irradiation dose measurements, the knowledge of the beam localization and the beam profile/energy distribution in the beam are parameters of interest for charged particle accelerator installations when they are used in scientific investigations, industrial applications or medical treatments. The transverse profile of the beam, its position, its centroid location, and its focus or flatness depend on the instrument operating conditions or on the beam exit setup. Proof-of-concept of a new type of charged particle beam diagnostics based on fiber Bragg gratings (FBGs was demonstrated. Its operating principle relies on the measurement of the peak wavelength changes for an array of FBG sensors as function of the temperature following the exposure to an electron beam. Periodically, the sensor irradiation is stopped and the FBG are force cooled to a reference temperature with which the temperature influencing each sensor during beam exposure is compared. Commercially available FBGs, and FBGs written in radiation resistant optical fibers, were tested under electron beam irradiation in order to study their possible use in this application.

  1. 基于DSP他励直流电机模糊PID控制器仿真研究%Simulation Research of Fuzzy PID Controller for Separately Excited DC-Motor Based on DSP

    Institute of Scientific and Technical Information of China (English)

    张小鸣; 龙仕玉

    2012-01-01

    针对他励直流电机调速系统参数模型的非线性、时变性,常规PID控制器参数离线整定带来的非优化的问题,提出一种基于DSP的模糊PID控制器算法,以电流反馈误差及误差的变化率作为模糊控制器的输入变量,采用参数自整定的模糊PID控制器实现PID参数在线优化.以DSP开发系统作为仿真平台,将他励直流电机传递函数转换为差分方程,构成基于模糊PID控制器的数字闭环他励直流电机仿真系统.利用DSP高速运算能力进行在线仿真,观察常规PID控制器和模糊PID控制器产生的系统输出波形.CCS2.0和MATLAB仿真实验表明;模糊PID控制器基本实现输出无超调,系统阶跃响应的上升时间和调整时间均比常规的PID控制器阶跃响应的小.模糊PID控制器应用于他励直流电机调速系统中,控制性能明显高于基于常规PID的调速系统.%For the nonlinearity and time-varying model of separately excited DC motor speed control system, the non - optimum problems are brought by offline setting parameters of traditional PID controller, a fuzzy PID controller algorithm based on DSP is proposed. With current feedback error and error change rate as input variables of fuzzy controller, PID parameters are optimized online using self-setting parameters fuzzy PID controller. With DSP development system as simulation platform, separately excited DC motor transfer function transformation as difference equation, a digital closed-loop simulation system of separately excited DC motor based on fuzzy PID controller is set up. Online simulation is carried out by DSP high speed operation ability. The system output waveforms generated by traditional PID controller and fuzzy PID controller are observed. CCS 2. 0 and Matlab simulation tests show that fuzzy PID controller realizes zero overshot basically, the rise time and adjusted time of system step response is smaller than traditional PID controller's. System proformances

  2. Performance and perspectives of the diamond based Beam Condition Monitor for beam loss monitoring at CMS

    CERN Document Server

    AUTHOR|(CDS)2080862

    2015-01-01

    At CMS, a beam loss monitoring system is operated to protect the silicon detectors from high particle rates, arising from intense beam loss events. As detectors, poly-crystalline CVD diamond sensors are placed around the beam pipe at several locations inside CMS. In case of extremely high detector currents, the LHC beams are automatically extracted from the LHC rings.Diamond is the detector material of choice due to its radiation hardness. Predictions of the detector lifetime were made based on FLUKA monte-carlo simulations and irradiation test results from the RD42 collaboration, which attested no significant radiation damage over several years.During the LHC operational Run1 (2010 â?? 2013), the detector efficiencies were monitored. A signal decrease of about 50 times stronger than expectations was observed in the in-situ radiation environment. Electric field deformations due to charge carriers, trapped in radiation induced lattice defects, are responsible for this signal decrease. This so-called polarizat...

  3. 8-channel, FPGA based, DSP integrated cavity simulator and controller for VUV-FEL. SIMCON 3.0 Ver. 3.0. rev. 1, 06.2005 - Hardware manual

    Energy Technology Data Exchange (ETDEWEB)

    Pozniak, K.T.; Czarski, T.; Koprek, W.; Giergusiewicz, W.; Romaniuk, R.S. [Warsaw Univ. of Technology (Poland). Inst. of Electronic Systems ELHEP Laboratory

    2005-07-01

    The note describes integrated, eight channel system of hardware controller and simulator of the resonant superconducting, narrowband niobium cavity, originally considered for the TTF and TESLA in DESY, Hamburg (now tested for the VUV FEL and developed for X-Ray FEL). The controller bases on a programmable circuit Xilinx VirtexII V4000. The solution uses DSP EMBEDDED BOARD module positioned on a Modular LLRF Control Platform. The algorithm and FPGA circuit configuration was done in the VHDL language. The internal hardware multiplication components, present in Virtex II chips, were used, to improve the floating point calculation efficiency. The implementation was achieved of a device working in the real time, according to the demands of the LLRF control system for the TESLA Test Facility (now associated with the VUV FEL machine). The device under consideration will be referred to as superconducting cavity (SCCav) SIMCON throughout this work. The manual describes hardware features of SIMCON, ver. 3.0 in modular solution. The following components are described here in detail: functional layer, parameter programming, foundations of control of particular blocks and monitoring of the real time processes. This note is accompanied by the one describing the multichannel DOOCS interface for the described hardware system. The interface was prepared in DOOCS for Solaris and in Windows. The hardware and software of 8-channel SIMCON was tested in CHECIA and ACC1 module of VUV FEL linac. The measurements results are presented. While giving all necessary technical details required to understand the work of the integrated hardware controller and simulator and to enable its practical copying, this document is a unity with other TESLA technical notes published by the same team on the subject. Thus, some modeling and other subjects were omitted, as they were addressed in detail in the quoted references. Keywords: Super conducting cavity, cavity simulator, CAVITIES CONTROLLER, SIMCON

  4. DSP acceleration using cache logic FPGAs

    Science.gov (United States)

    Rosenberg, Joel

    1995-09-01

    Stand-alone digital signal processors (DSPs) support many on-chip functions and are highly optimized for the demands of high-speed computing. The problem associated with this functional optimization is that the increase in performance comes at the expense of flexibility. To make the DSP general purpose enough for a wide variety of applications, a custom ASIC must be used to achieve the desired performance. DSPs and ASICs are not able to easily adapt on-the-fly to different algorithms. Even DSPs that can do this don't match the high level of optimization provided by an ASIC. Recent developments in FPGA design tools enable system designers to develop in-system reconfigurable adaptive DSP hardware. Designed to exploit register rich, dynamically recongigurable field programmable gate arrays, high speed custom DSP functions can be created and implemented, resulting in significantly improved performance for compute-intensive applications, including graphics and image processing, telecommunications, networking and instrumentation.

  5. CCD based beam loss monitor for ion accelerators

    Science.gov (United States)

    Belousov, A.; Mustafin, E.; Ensinger, W.

    2014-04-01

    Beam loss monitoring is an important aspect of proper accelerator functioning. There is a variety of existing solutions, but each has its own disadvantages, e.g. unsuitable dynamic range or time resolution, high cost, or short lifetime. Therefore, new options are looked for. This paper shows a method of application of a charge-coupled device (CCD) video camera as a beam loss monitor (BLM) for ion beam accelerators. The system was tested with a 500 MeV/u N+7 ion beam interacting with an aluminum target. The algorithms of camera signal processing with LabView based code and beam loss measurement are explained. Limits of applicability of this monitor system are discussed.

  6. Ultracompact beam splitters based on plasmonic nanoslits

    Science.gov (United States)

    Zhou, Chuanhong; Kohli, Punit

    2011-01-01

    An ultracompact plasmonic beam splitter is theoretically and numerically investigated. The splitter consists of a V-shaped nanoslit in metal films. Two groups of nanoscale metallic grooves inside the slit (A) and at the small slit opening (B) are investigated. We show that there are two energy channels guiding light out by the splitter: the optical and the plasmonic channels. Groove A is used to couple incident light into the plasmonic channel. Groove B functions as a plasmonic scatter. We demonstrate that the energy transfer through plasmonic path is dominant in the beam splitter. We find that more than four times the energy is transferred by the plasmonic channel using structures A and B. We show that the plasmonic waves scattered by B can be converted into light waves. These light waves redistribute the transmitted energy through interference with the field transmitted from the nanoslit. Therefore, different beam splitting effects are achieved by simply changing the interference conditions between the scattered waves and the transmitted waves. The impact of the width and height of groove B are also investigated. It is found that the plasmonic scattering of B is changed into light scattering with increase of the width and the height of B. These devices have potential applications in optical sampling, signal processing, and integrated optical circuits. PMID:21647248

  7. Tune measurement for the CERN proton synchrotron booster rings using DSP in VME

    CERN Document Server

    Chapman-Hatchett, A; D'Amico, T E

    1999-01-01

    The CERN PS Booster (PSB) consists of 4 superposed rings supplied with protons from a 50 MeV Linac The CERN PS Booster (PSB) consists of 4 superposed rings supplied with protons from a 50 MeV Linac. The proton beam is then accelerated to 1 GeV and sent either to the 26 GeV Proton Synchrotron (PS) or to the ISOLDE facility. This is carried out in a multi-cycle mode every 1.2 s. For high-intensity beams, the working-point in the tune diagram needs to be changed considerably during acceleration from 50 MeV to 1 GeV and the repeated measurement of the tunes throughout the cycle is an important requirement. Up to now, tune values were obtained through calculations based on quadrupole currents. However, practical experience has shown the need for a direct tune measurement system. For this purpose, a classical kick technique is used. A fixed amplitude kick of duration equal to one revolution period excites coherent betatron oscillations. For fast treatment, a Digital Signal Processing (DSP) module in a VME-standard ...

  8. Performance based design of reinforced concrete beams under impact

    Directory of Open Access Journals (Sweden)

    S. Tachibana

    2010-06-01

    Full Text Available The purpose of this research is to collect fundamental data and to establish a performance-based design method for reinforced concrete beams under perpendicular impact load.

    Series of low speed impact experiments using reinforced concrete beams were performed varying span length, cross section and main reinforcement.

    The experimental results are evaluated focusing on the impact load characteristics and the impact behaviours of reinforced concrete beams. Various characteristic values and their relationships are investigated such as the collision energy, the impact force duration, the energy absorbed by the beams and the beam response values. Also the bending performance of the reinforced concrete beams against perpendicular impact is evaluated.

    An equation is proposed to estimate the maximum displacement of the beam based on the collision energy and the static ultimate bending strength. The validity of the proposed equation is confirmed by comparison with experimental results obtained by other researchers as well as numerical results obtained by FEM simulations. The proposed equation allows for a performance based design of the structure accounting for the actual deformation due to the expected impact action.

  9. 基于DSP的光电测试设备自动调平研究%Research on Automatic-leveling for Photoelectric Test Equipments Based on DSP

    Institute of Scientific and Technical Information of China (English)

    李成; 宁琦

    2012-01-01

    针对各类光电测试设备的调平需求,在调平理论分析的基础上,提出了一种通用的四点支撑自动调平方案,给出了硬件及软件设计,可用于各类光电测试设备的自动调平。自动调平系统将倾角传感器、控制器和调平机构融合成一个有机整体,根据精密倾角传感器提供的倾角数值,利用角度误差调平理论,将支腿的移动量换算成驱动步进电机所需的脉冲数,由DSP产生脉冲信号驱动电机带动丝杆自动伸缩调整设备至水平状态,具有调平快速、准确、可靠的特点,具有良好的应用价值。%According to the leveling requirements of the different photoelectric test equipments, on the basis of analyzing the leveling theory, a general four-point automatic leveling solution is proposed, and the hardware and software designs are given, which can be used in the automatic leveling of all kinds of photoelectric test equipments. Automatic leveling system can integrate obliquity sensors, controller and leveling mechanism into an organic whole, according to the dip angle from the precise obliquity sensors and the leveling angle error theory, the outrigger displacement is converted to the required numbers of pulses which drive the stepping motor. The pulse signal which can be used to drive the motors is generated from the DSP controller, so the equipment can be adjusted to level by the screw retraction. This solution is rapid, accurate and reliable, which has the good value.

  10. 基于DSP的家庭健康监护仪的设计%DSP-based design of family health monitor

    Institute of Scientific and Technical Information of China (English)

    孟淑琴; 王磊

    2009-01-01

    目的 设计一种新型的适合家庭使用的便携式监护系统.方法 系统以数字信号处理器(TMS320F2812)为核心控制芯片,主要实现对系统中其它模块的控制功能,完成MD采样及LCD液晶显示;采用蓝牙通汛模块,实现了系统与PC机之间数据的实时快速传输.结果 该监护仪能正确完成人体心电、呼吸频率、脉搏以及体温等多项人体生命参数的监测,且性能稳定.结论 充分利用DSP与蓝牙模块的优势,设计体积小、功耗低、使用简单方便、面向家庭的新型多功能监护仪,具有广阔的应用与市场前景.%Objective To design a new portable vital signs monitor for family use. Methods TMS320F2812, a kind of digital signal processor, was applied as the main processor to control the functional mod-ules including A/D convertor, LCD display. Bluetooth communication module was introduced to achieve real-time fast transfer of data between the system and the PC. Results Not only can the system monitor electrocardiogram (ECG), breath rate, pulse rate, body temperature and other vital signs accurately, but also it runs stably. Conclusion The features of DSP and Bluetooth were well combined in the design of the family-oriented, easy to use, multi-functional monitor with small size, low power consumption and convenience. A broad application and market prospects can be predicted.

  11. The frequency characteristic tester of low frequency based on DSP%基于DSP的低频频率特性测试仪

    Institute of Scientific and Technical Information of China (English)

    闻程; 齐向东; 王兴; 杜杨

    2011-01-01

    传统的频率特性测试仪不仅价格昂贵,且得不到相频特性,更不能保存频率特性图和打印频率特性图,也不能与计算机接口,给使用者带来了诸多不便.而本文采用DDS技术作为扫频信号源;同时采用了集成模拟芯片AD8302对幅度和相位进行检测,用DSP芯片TMS320VC5409和CPLD芯片EPM7128进行测量控制和数据处理,人机接口部分是利用单片机AT89C51实现,并配有打印机接口和串行通信接口.系统基本达到了全数字化,这有利于缩小仪器的体积,减轻重量,降低成本,并能较好的显示幅频特性和相频特性曲线.%Traditional tester for frequency characteristic not only had high price, but also couldn't give phase frequency characteristic of the quizzed network, yet couldn't save and print frequency characteristic and couldn't connet with PC.These gave user a lot of discommodity. However, adoptting the DDS technology as a sweep frequency signal source, using the AD8302 of integrated simulation chip to test amplitude and phase and using the TMS320VC5409 of DSP chip and the EPM7128 of CPLD chip to control measuring and process data. The section of man-machine interface uses the AT89C51 of SCM to realize, and has the printer and serial communication of the interfaces. The system reaches a basic all-digital,which make for shrinking the size, reducing the weight and the cost of equipment, moreover can display the characteristic curve of amplitude and phase preferably.

  12. SPROC: A multiple-processor DSP IC

    Science.gov (United States)

    Davis, R.

    1991-01-01

    A large, single-chip, multiple-processor, digital signal processing (DSP) integrated circuit (IC) fabricated in HP-Cmos34 is presented. The innovative architecture is best suited for analog and real-time systems characterized by both parallel signal data flows and concurrent logic processing. The IC is supported by a powerful development system that transforms graphical signal flow graphs into production-ready systems in minutes. Automatic compiler partitioning of tasks among four on-chip processors gives the IC the signal processing power of several conventional DSP chips.

  13. A High-performance Fetch Pipeline Based On the VLIW DSP Architecture%一种基于VLIW DSP架构的高性能取指流水线

    Institute of Scientific and Technical Information of China (English)

    杨惠; 陈书明; 万江华

    2011-01-01

    以超长指令字(VLIW)数字信号处理器(DSP)作为平台,针对现有提高单线程取指流水线效率的方法中存在的弊端,提出了一种高性能的取指流水架构.该架构支持无效取指的检测与作废,从而降低不必要的cacbe访问,减少取指流水停顿周期,该结构还引入专用硬件支持编译调度的循环软流水,有效提高指令并行性,降低代码存储空间,由此释放出的单线程取指流水线的空闲周期约达46.34%.实验结果表明,相比优化前的取指流水而言,代码空同压缩约11.93%,执行周期缩短约8.67%,cache访同次数下降约12.84%,指令cache暂停周期缩短约7.86%,处理器单线程的指令吞吐率平均提高约11.7%.%For the drawbacks existent in single-thread fetch pipeline to improve the efficiency, a high-performance fetch pipeline structure is proposed in tins paper based on the platform of the VIIW digital signal processor ( DSP). It can support the detection and void for the invalid fetch, bypass for die missing fetch, which reduces the unnecessary cache access and fetch pipeline stall. The structure also inducts dedicated hardware which supports the software pipeline of scheduled compilation to improve the parallelism of instruction. It reduces the code memory space) and the idle cycles of released single-threaded pipeline is reached up to about 46.34%. Compared with the fetch pipeline before optimized, experiment results show that the code storage space is reduced about 11.93%, the average execution cycle is shortened about 8.67%, the cache access times is decreased about 12.84%, the suspension period of instruction cache is shortened about 7.86%, and die single-threaded instruction throughput of processor is increased by 11.7%.

  14. 基于模型化DSP快速设计的音频信号采集系统%Fast design of audio signal acquisition system based on DSP modeling design

    Institute of Scientific and Technical Information of China (English)

    李智勇; 王飞; 朱强

    2015-01-01

    数字信号控制器具有数字信号处理器和微控制器的优点,在现代自动控制、数据采集系统中占据着重要的地位,TMS320F28335作为目前最主流的数字信号控制器,在实际工程中被广泛的使用.目前该处理器存在着程序设计周期长,程序设计过程复杂等问题.采用模型化设计的DSP嵌入式系统程序开发方法能很好地解决这个问题.以设计一个基于DSP的音频数据采集系统为例,通过将CCS软件和Matlab/Simulink进行有机的结合,对模型进行图形化界面配置,最终实现目标处理器程序代码的自动生成、下载、调试和运行,从而快速地实现音频信号数据采集系统的设计.%The digital signal controller has the advantages from digital signal processor and microcontroller,which has played the important role in modern automatic control and data acquisition system. TMS320F28335 as the mainstream digital sig-nal controller is widely used in practical engineering. Currently,this processor has the problems of long period program design and complicated program design process. The program development method of DSP embedded system with modeling design can solve these problems better. Taking design a DSP-based audio signal acquisition system as an instance,the graphic interface of the model is configured by combining CCS software with Matlab/Simulink greatly. The automatic generation,downloading,de-bugging and operation of the program codes in the target processor are realized,and the design of this audio signal acquisition system can be implemented fast.

  15. 基于USB和DSP的高速凸轮机构信号采集系统%High-speed Cam Mechanism Signal Sampling System Based on USB and DSP

    Institute of Scientific and Technical Information of China (English)

    陈秀霞; 卢刚; 李声晋; 郑力

    2011-01-01

    According to the limitation of old signal sampling system which was used in cam mechanism in teaching experiment , designed a high-speed signal sampling system based on USB2. O and DSP. The hardware circuit of the system included signal acquisition circuit, counting circuit of photoelectric coded disk , signal processing circuit and USB interface circuit. Signal processing circuit used TMS32OF28335 as the master chip to process signal. TMS320F28335 is a 32-hit floating-point DSP. Processed data was sent to USB interface circuit by using SPI-bus. USB interface circuit included FPGA and CY7C68013. The serial data was converted into a certain format by FPGA ,the converted data was sent to personal computer by CY7C68013 to display and storage. The software of the system included PC application program, USB communication program and digital signal processor progamming. By using the hardware circuit and software,the system can sample speed signal of a cam mechanism.%针对高速凸轮机构原有信号采集系统的缺陷,设计了基于USB2.0和DSP的高速信号采集系统,该系统的硬件电路包括模拟信号调理电路、光电码盘计数电路、信号处理电路和USB接口电路.信号处理模块选用32位浮点型DSPTMS320F28335作为核心器件对信号进行处理,通过使用SPI总线将处理后的数据传输到USB2.0接口模块.USB2.0接口模块的主要器件是FPGA和CY7C68013,FPGA将接收的数据转换为可被USB接口芯片CY7C68013传输的格式,传输到PC机进行显示、存储等.信号采集系统的软件部分包括上位机应用程序、USB通信程序和数字信号处理器程序,通过硬件电路和软件的有机结合实现凸轮机构高速信号的采集.

  16. Design of Data Acquisition System Used for APF Based on DSP and CPLD%基于DSP和CPLD的有源滤波器数据采集系统设计

    Institute of Scientific and Technical Information of China (English)

    李鹏; 李树广

    2012-01-01

    Based on two DSPs, CPLD and ADS8556, a data acquisition system of a APF is designed, which is applied to electric railway system to compensate the harmonic current. The system takes a Hall sensor system and A/D converters as prior acquisition circuit, then CPLD controls ADC to sample. One DSP fulfill signal sample, FFT calculation, real time control including transmit the calculated compensation circuit signal to microcontroller which can provide SPWM signal to drive inverter, and send the control data into dual-port RAM. Another DSP receives the data from dual-port RAM which is used to fulfill relevant relay auto-switching control and man-machine exchange. The effectiveness of the structure had been verified by the experimental results which show the proposed system greatly improved the capacity of data acquisition and the effect of harmonic compensation with the higher speed of data processing and sample precision.%针对电气化铁路谐波的要求及其特点,提出了一种基于TMS320F2812双DSP、CPLD以及ADS8556的数据采集系统.整个系统以霍尔传感器和A/D转换器组成前向采集电路,并由CPLD控制A/D转换,其中一个DSP作为主控制器,负责对电网电压/电流及负载侧电流采样、FFT运算以及通过CAN总线接口得到的补偿指令信号传送给单片机产生SPWM信号进行逆变驱动,并将处理得到的数据存储在双口RAM中.另一个DSP作为从控制器从双口RAM中得到数据,实现相应的继电器自动投/切开关及人机交互等功能.本设计被成功应用于电气化铁路智能有源滤波器中,实验表明大大增加了DSP数据采集能力与处理速度,采样精度得到很大的提高,达到了改善谐波补偿效果的目标.

  17. Performance based analysis of hidden beams in reinforced concrete structures

    Directory of Open Access Journals (Sweden)

    Helou Samir H.

    2014-01-01

    Full Text Available Local and perhaps regional vernacular reinforced concrete building construction leans heavily against designing slabs with imbedded hidden beams for flooring systems in most structures including major edifices. The practice is distinctive in both framed and in shear wall structures. Hidden beams are favoured structural elements due to their many inherent features that characterize them; they save on floor height clearance; they also save on formwork, labour and material cost. Moreover, hidden beams form an acceptable aesthetic appearance that does not hinder efficient interior space partitioning. Such beams have the added advantage of clearing the way for horizontal electromechanical ductwork. However, seismic considerations, in all likelihood, are seldom seriously addressed. The mentioned structural system of shallow beams is adopted in ribbed slabs, waffle slabs and at times with solid slabs. Ribbed slabs and waffle slabs are more prone to hidden beam inclusion due to the added effective height of the concrete section. Due to the presence of a relatively high reinforcement ratio at the joints the sections at such location tend to become less ductile with unreliable contribution to spandrel force resistance. In the following study the structural influence of hidden beams within slabs is investigated. With the primary focus on a performance based analysis of such elements within a structure. This is investigated with due attention to shear wall contribution to the overall behaviour of such structures. Numerical results point in the direction that the function of hidden beams is not as adequate as desired. Therefore it is strongly believed that they are generally superfluous and maybe eliminated altogether. Conversely, shallow beams seem to render the overall seismic capacity of the structure unreliable. Since such an argument is rarely manifested within the linear analysis domain; a pushover analysis exercise is thus mandatory for behaviour

  18. Valley-dependent beam manipulators based on photonic graphene

    Science.gov (United States)

    Deng, Fu-Sheng; Sun, Yong; Dong, Li-Juan; Liu, Yan-Hong; Shi, Yun-Long

    2017-02-01

    Trigonal warping distortion in energy band lifts the degeneracy of two valleys (K and K' points) of graphene. In this situation, electron transport becomes valley dependent, which can be used to design the valley beam splitter, collimator, or guiding device. Here, valley-dependent beam manipulators are designed based on artificial photonic graphene. In this scheme, the finite-size artificial photonic graphene is intentionally designed to realize the novel device functionalities. This kind of valley-dependent beam manipulators can work at an arbitrary range of electromagnetic waves from microwave to visible light. It potentially paves the way for the application of photonic graphene in future integrated photonic devices.

  19. Proton-beam writing channel based on an electrostatic accelerator

    Science.gov (United States)

    Lapin, A. S.; Rebrov, V. A.; Kolin'ko, S. V.; Salivon, V. F.; Ponomarev, A. G.

    2016-09-01

    We have described the structure of the proton-beam writing channel as a continuation of a nuclear scanning microprobe channel. The problem of the accuracy of positioning a probe by constructing a new high-frequency electrostatic scanning system has been solved. Special attention has been paid to designing the probe-forming system and its various configurations have been considered. The probe-forming system that best corresponds to the conditions of the lithographic process has been found based on solving the problem of optimizing proton beam formation. A system for controlling beam scanning using multifunctional module of integrated programmable logic systems has been developed.

  20. Research on DSP Ethernet Communication Technology%DSP以太网通信技术研究

    Institute of Scientific and Technical Information of China (English)

    董超; 朱军; 史勃

    2012-01-01

    阐述嵌入式以太网通信技术的一般原理.用TMS320F2812的DSP和RTL8019AS以太网控制芯片为电池化成设备控制系统实现了以太网通信功能.详细介绍硬件接口电路的设计,根据DSP的体系结构编写了简化的协议栈,并用DSP专用的实时操作系统DSP/BIOS与协议栈协同工作,最后用以太网测试程序对所设计的软、硬件进行了测试.%The general principle of embedded Ethernet communication technology was introduced. TI' sTMS320F2812 DSP and Realtek's RTL8019AS Ethernet control chip were employed to implement Ethernetcommunication for battery formation equipment control system. The hardware interface circuit design and theDSP-based simplified protocol stack with simplified architecture were presented to cooperate with DSP's DSP/BIOS real-time operation system,and then Ethernet testing program was applied to the software and hardwaredesigned.

  1. A central neuropathic pain model by DSP-4 induced lesion of noradrenergic neurons: preliminary report.

    Science.gov (United States)

    Kudo, Takashi; Kushikata, Tetsuya; Kudo, Mihoko; Kudo, Tsuyoshi; Hirota, Kazuyoshi

    2010-09-06

    Neuropathic pain models are classified as central and peripheral pain models. Although various peripheral neuropathic pain models are established, central pain models are based only on spinal cord injury. DSP-4 is a competitive inhibitor of norepinephrine uptake that selectively degenerates the locus coeruleus (LC)-noradrenergic neurons projection to the cerebral cortex and hippocampus. In the present study, we have tested whether lesion of LC-noradrenergic neurons by ip DSP-4 (0, 10, 30, 50 mg/kg, n=7 each) could provide a new central neuropathic pain model in rats using a hot-plate and tail-flick tests. DSP-4 significantly reduced the hot-plate latency and norepinephrine contents especially in the coerulean regions. However, DSP-4 did not change tail-flick latency. There are significant correlations of the latency in the hot-plate test with norepinephrine contents in the cerebral cortex (r=0.432, p=0.022), the hippocampus (r=0.465, p=0.013) and the pons (r=0.400, p=0.035) but not with those in the hypothalamus and the spinal cord. As response to hot-plate and tail-flick implies supra-spinal process and spinal reflex, respectively, central neuropathic pain may be facilitated by DSP-4 depleting LC-noradrenergic neurons although the present data are preliminary.

  2. Sex determination using the Probabilistic Sex Diagnosis (DSP: Diagnose Sexuelle Probabiliste) tool in a virtual environment.

    Science.gov (United States)

    Chapman, Tara; Lefevre, Philippe; Semal, Patrick; Moiseev, Fedor; Sholukha, Victor; Louryan, Stéphane; Rooze, Marcel; Van Sint Jan, Serge

    2014-01-01

    The hip bone is one of the most reliable indicators of sex in the human body due to the fact it is the most dimorphic bone. Probabilistic Sex Diagnosis (DSP: Diagnose Sexuelle Probabiliste) developed by Murail et al., in 2005, is a sex determination method based on a worldwide hip bone metrical database. Sex is determined by comparing specific measurements taken from each specimen using sliding callipers and computing the probability of specimens being female or male. In forensic science it is sometimes not possible to sex a body due to corpse decay or injury. Skeletalization and dissection of a body is a laborious process and desecrates the body. There were two aims to this study. The first aim was to examine the accuracy of the DSP method in comparison with a current visual sexing method on sex determination. A further aim was to see if it was possible to virtually utilise the DSP method on both the hip bone and the pelvic girdle in order to utilise this method for forensic sciences. For the first part of the study, forty-nine dry hip bones of unknown sex were obtained from the Body Donation Programme of the Université Libre de Bruxelles (ULB). A comparison was made between DSP analysis and visual sexing on dry bone by two researchers. CT scans of bones were then analysed to obtain three-dimensional (3D) virtual models and the method of DSP was analysed virtually by importing the models into a customised software programme called lhpFusionBox which was developed at ULB. The software enables DSP distances to be measured via virtually-palpated bony landmarks. There was found to be 100% agreement of sex between the manual and virtual DSP method. The second part of the study aimed to further validate the method by analysing thirty-nine supplementary pelvic girdles of known sex blind. There was found to be a 100% accuracy rate further demonstrating that the virtual DSP method is robust. Statistically significant differences were found in the identification of sex

  3. Research of Electrical Parameters Sampling and Processing System Based on DSP for Ships%基于DSP的电量参数采集和处理系统研究

    Institute of Scientific and Technical Information of China (English)

    孙建红

    2012-01-01

    针对船舶配电网络运行的监测和管理水平相对落后的问题,提出了配电监测电量参数监测采集和处理系统的研制理念与设计方法。本文在充分研究船舶配电系统的要求和特点后,开发了以TI公司的TMS320VC5402型DSP芯片为计算和控制核心的电量参数采集和处理系统,有效地改善了船舶配电系统运行数据的收集和监测的手段。%Aimed at some questions and the lag state of monitoring and management means for power distribution in ships, the conception and the design method of the power distribution monitoring electrical parameters sampling and processing system is put forward in this thesis. Fully having studied requirements and characteristics of power distribute system in ships, we propose TMS320VC5402-based Tl's DSP as the core of the calculation and control in the electrical parameters sampling and processing system, to improve ship performance of the data collection and monitoring of the power distribution system.

  4. Design of Floating-point DSP Experimental Teaching System based on ADSP-21369%基于ADSP-21369的浮点DSP实验教学系统设计

    Institute of Scientific and Technical Information of China (English)

    韩赛; 杜普选

    2012-01-01

    This paper focused on the research and design of Floating-point DSP Experimental Teaching System based on ADSP-21369. It was implemented the control of SDRAM, FLASH, ADC, DDS and other external memory by ADSP-21369 and other analog devices. LCD, UART and keyboard could be controlled by using ADSP-21369's inherent resources and the digital peripheral interface (DPI). The digital application interface (DAI) could be used to control the audio, S/PDIF and LED.%本文研究并设计出一套基于ADSP-21369的浮点DSP教学实验系统.采用ADSP-21369处理器,辅以其它模拟器件,实现对SDRAM,FLASH,ADC和DDS等外部存储器的控制.利用ADSP-21369的固有资源,通过数字外设接口(DPI)完成对LCD,UART及键盘控制,通过数字应用接口(DAI)完成对音频,S/PDIF和LED灯等的控制.

  5. Design of inverter and grid connected phase locked loop based on DSP control for photovoltaic power generation%基于DSP控制的光伏发电逆变并网锁相环设计

    Institute of Scientific and Technical Information of China (English)

    秦天像; 杨天虎; 任小勇

    2016-01-01

    该文设计了一种基于DSP软件控制的太阳能光伏发电逆变并网锁相环系统。用指针归零法实现了锁相环跟踪控制,并将设计的锁相环运用到光伏并网逆变器中。在MATLAB中建立了仿真模型,仿真结果表明,所设计的锁相环达到了光伏逆变系统的同步要求,具有较高的推广应用价值。%This paper designed solar photovoltaic inverter power grid phase locked loop system based on the DSP software control. The phase locked loop tracking control is realized by using the pointer to ze-ro method, and the design of the phase locked loop is applied to the PV grid connected inverter. The sim-ulation model was built in MATLAB. The simulation results show that the phase locked loop of this paper can meet the requirements of the synchronization performance of PV inverter system, it is of high popular-ization value.

  6. Designing velocity modulation and measuring system of direct current motor based on the DSP%基于DSP的直流电机调速、测速系统设计

    Institute of Scientific and Technical Information of China (English)

    王惠平

    2011-01-01

    To realize the control function of velocity modulation and measuring of direct current motor,the platform of TMS320LF2407A model DSP was used to develop a 24V control system based on digital PWM principle.The system can be connected to a computer with simple serial port software.The electrical circuit is simple,reliable and practical.%为了精确实现直流电机调速、测速等控制功能,文中利用TMS320LF2407A型号的DSP实验平台,以数字PWM对直流电机调速为控制原理,构建了一个24V直流电机控制系统,且可通过一个简单的串口软件实现电脑输入调节,通过设计本系统较精确的实现了电机调速、测速和串口通信显示等功能,该设计方案电路简单、可靠性强,具有较高的应用价值。

  7. GMA-DSP测控系统的PID控制设计与实现%Design and realization of PID control based on GMA-DSP test and control system

    Institute of Scientific and Technical Information of China (English)

    马志新; 陈晓红

    2012-01-01

    设计了一种用于精密定位控制的超磁致伸缩微位移驱动器(GMA),介绍了其结构及工作原理,并构建了以DSP处理芯片TMS320F2812为控制核心的GMA位移闭环控制系统,在实验辨识系统控制对象模型的基础上,设计了PID控制调节器,经实验测试,成功实现了输出位移的高稳定、高精度自动控制,为GMA在高精控制领域的实际应用奠定了基础.%A kind of Giant Magnetostrictive Actuator( GMA) for precision positioning is designed, with introduction of its structure and working principle. The closed loop displacement control system for GMA is constructed using DSP TMS320F2812,and based on model identification,the PID controller is designed to adjust the system. Finally,the experiment result indicates the control system is stable and precise,which provides a groundwork for GMA to be applied in precision control field.

  8. 基于DSP和FPGA的汽车防撞高速数据采集系统%A high speed data acquisition system for automotive collision warning devices based on DSP-FPGA

    Institute of Scientific and Technical Information of China (English)

    蒋伟

    2012-01-01

    With the continuous development of information technology, data acquisition technology has become an important modern tool, and is also expanding its scope of application. It has been widely used in communication, radar, medical, remote sensing and other fields. This data acquisition system designed is based on a high-speed DSP-FPGA data acquisition, primarily for high-speed acquisition and processing on laser radar echo signal in automotive collision warning devices.%随着信息技术的不断发展,数据采集技术已成为重要的现代化的工具,并且其应用范围也在不断扩大,在通信、雷达、医疗、遥测遥感等领域得到了广泛的应用。本文为了汽车防撞报警设备高速信号处理的目的.采用了DSP和FPGA处理器加上相关算法,实现了对激光雷达回波信号能够高速的采集和处理。

  9. Design and Realization of Active Noise Control System Based on TMS320VC5509 DSP%基于TMS320VC5509 DSP的有源噪声控制系统设计与实现

    Institute of Scientific and Technical Information of China (English)

    张有鹏; 陈春明; 李国海

    2011-01-01

    介绍了有源噪声控制技术的理论基础和算法,以自适应有源噪声前馈控制系统为研究核心,选用TMS320VC5509 DSP作为控制器,给出了系统的硬件解决方案,并用C语言编程在硬件系统上实现了基于FX-LMS算法的有源噪声实时控制.对800 Hz单频噪声的实验结果表明系统可降低噪声幅度9 dB.%The foundational theory and algorithm of active noise control technology are introduced. The feed-forward a-daptive active noise control ( AANC) system is presented, the hardware solution of the system is proposed by selecting TMS320VC5509 DSP as the controller. Using the C language, the active noise real-time control system is realized based on the FX-LMS algorithm. It's proved that 9dB cancellation on 800 Hz is achieved by the experiment.

  10. 基于最大似然估计和DSP技术的相位补偿算法%Phase Compensation Algorithm Based on Maximum Likelihood Estimation and DSP Technology

    Institute of Scientific and Technical Information of China (English)

    铁维昊; 王文利; 路灿

    2012-01-01

    针对低压电力线非线性信道特性及不同步因素对于载波信号相位的影响,笔者提出了一种基于最大似然估计的相位补偿算法.首先分析了同步问题对于误码率的影响.其次,介绍了相位补偿算法的原理及关键技术的分析.最后在DSP中实现了相位补偿算法的程序设计,并在实际的低压信道中进行测试.测试结果表明:该算法可以有效地解决数字通信中信道的非线性引起的信号失真问题.%To investigate the influence of nonlinearity and asynchronization of low-voltage power line channel on phase of carrier signal,a phase compensation algorithm based on maximum likelihood estimation is proposed. First the influence of synchronization on BER is analyzed, then the principle of the phase compensation algorithm and key technology are introduced. Finally,program of the phase compensation algorithm is implemented in DSP, and is tested in actual low-voltage channel. The result shows that the proposed algorithm can eliminate signal distortion caused by nonlinearity of channel in digital communication.

  11. 基于DSP的无刷直流电动机控制系统的研究与设计%Research and Design of Brushless DC Motor Control System Based on DSP

    Institute of Scientific and Technical Information of China (English)

    王宪磊; 王淑红

    2012-01-01

      介绍了无刷直流电动机的基本结构、工作原理和运行特性,简述了基于DSP的无刷直流电动机的控制策略,对无刷直流电动机双闭环控制系统的硬、软件设计作了详细论述。文章所述无刷直流电动机控制系统的设计方案,可以获得良好的速度控制性能。%  The basic structure, working principle and operation characteristics of brushless DC motor were introduced. The control strategy of brushless DC motor based on DSP was expounded, and the hardware and software design of the double closed loop control system was expounded in detail. The brushless DC motor control system described in this paper show good performance in speed control.

  12. 基于DSP控制的全数字直流PWM调速系统%Research on Software Platform of General- Purpose Digital Speed Regulation System Based on DSP Controller

    Institute of Scientific and Technical Information of China (English)

    刘龙江; 边鑫

    2012-01-01

    针对现存电压闭环和电流闭环直流调速系统各自的不足,首先对其结构进行了改进,分析研究了一种电压/电流双闭环直流调速系统.随后设计了一种基于DSP控制器的通用电机调速系统,并将其应用于电动车驱动系统电机控制中,实验结果表明,系统工作可靠稳定.%Firstly,according to the deficiency of the voltage closed - loop speed regulation system with the end current, a new kind of direct current speed regulation system based on voltage control strategy is put forward in this thesis, that is voltage/current double - closed - loop direct current speed regulation system. Secondly, in order to speed up the developing process of all sort of speed regulation system on the basis of DSP, a software platform of the general - purpose digital speed regulation system is devised. It is used successfully in the current closed - loop DC speed regulation system of EV.

  13. Project of universal DSP platform: cluster of floating point DSP processors

    Science.gov (United States)

    Dymanowski, Łukasz; Lewandowski, Kamil; Linczuk, Maciej

    2009-06-01

    In this paper, a project of cluster of DSP is presented. This project is realized as a extended card for PC computers. A block diagram of a board was described. A DSP processor properties for cluster computation was described. A block diagram of the board was discussed. Next, a details of hardware realization of this card was described. The PCB project was discussed. A details of multi-layers board was described.

  14. A Novel Dual Separate Paths (DSP) Algorithm Providing Fault-Tolerant Communication for Wireless Sensor Networks.

    Science.gov (United States)

    Tien, Nguyen Xuan; Kim, Semog; Rhee, Jong Myung; Park, Sang Yoon

    2017-07-25

    Fault tolerance has long been a major concern for sensor communications in fault-tolerant cyber physical systems (CPSs). Network failure problems often occur in wireless sensor networks (WSNs) due to various factors such as the insufficient power of sensor nodes, the dislocation of sensor nodes, the unstable state of wireless links, and unpredictable environmental interference. Fault tolerance is thus one of the key requirements for data communications in WSN applications. This paper proposes a novel path redundancy-based algorithm, called dual separate paths (DSP), that provides fault-tolerant communication with the improvement of the network traffic performance for WSN applications, such as fault-tolerant CPSs. The proposed DSP algorithm establishes two separate paths between a source and a destination in a network based on the network topology information. These paths are node-disjoint paths and have optimal path distances. Unicast frames are delivered from the source to the destination in the network through the dual paths, providing fault-tolerant communication and reducing redundant unicast traffic for the network. The DSP algorithm can be applied to wired and wireless networks, such as WSNs, to provide seamless fault-tolerant communication for mission-critical and life-critical applications such as fault-tolerant CPSs. The analyzed and simulated results show that the DSP-based approach not only provides fault-tolerant communication, but also improves network traffic performance. For the case study in this paper, when the DSP algorithm was applied to high-availability seamless redundancy (HSR) networks, the proposed DSP-based approach reduced the network traffic by 80% to 88% compared with the standard HSR protocol, thus improving network traffic performance.

  15. TC-1 Satellite of DSP Delivered

    Institute of Scientific and Technical Information of China (English)

    SunQing

    2004-01-01

    TC-1 satellite of Double Star Program (DSP), a near-earth equatorial satellite, was delivered to the representative of the end user, the Research Center for Space Science and Application under the Chinese Academy of Sciences (CAS) on April 12, 2004, which symbolized that TC-1 satellite was put into operation formally.

  16. Simulation of transition radiation based beam imaging from tilted targets

    Directory of Open Access Journals (Sweden)

    L. G. Sukhikh

    2017-03-01

    Full Text Available Transverse beam profile diagnostics in linear electron accelerators is usually based on direct imaging of a beam spot via visible transition radiation. In this case the fundamental resolution limit is determined by radiation diffraction in the optical system. A method to measure beam sizes beyond the diffraction limit is to perform imaging dominated by a single-particle function (SPF, i.e. when the recorded image is dominated not by the transverse beam profile but by the image function of a point source (single electron. Knowledge of the SPF for an experimental setup allows one to extract the transverse beam size from an SPF dominated image. This paper presents an approach that allows one to calculate two-dimensional SPF dominated beam images, taking into account the target inclination angle and the depth-of-field effect. In conclusion, a simple fit function for beam size determination in the case under consideration is proposed and its applicability is tested under various conditions.

  17. A Nonlinear Finite Element Framework for Viscoelastic Beams Based on the High-Order Reddy Beam Theory

    Science.gov (United States)

    2012-06-09

    these formulations employ some form of either the Euler-Bernoulli or Timoshenko beam theories and are mostly restricted to small strain analysis. The...and Kadioglu [1], wherein a Timoshenko beam element is de- veloped using mixed variational principles. In their work, the finite element model...method in their analysis of cylindrical helical rods (based on the Timoshenko beam hypotheses). Additional numerical formulations for viscoelastic beams

  18. Measurement of Phase Shift by Using a DSP

    Directory of Open Access Journals (Sweden)

    Petr KOČÍ

    2009-06-01

    Full Text Available The paper deals with design of the computer system for measurements of the phase shift between two harmonic signals using the Digital Signal Processor (DSP. The introducing part of the paper describes properties of the harmonic signals and the Hilbert transform. Concerning the Hilbert transform their two methods for computing, one is based on the Fourier transform while the second one benefits from the digital filters. The submitted paper deals with mentioned two methods for the phase evaluation as well. The phase shift between two harmonics signals is useful for rotors balancing. The algorithm of rotor balancing requires the amplitude of both the signals as well.

  19. Development of Learning Board for the Digital Relay Using DSP

    Energy Technology Data Exchange (ETDEWEB)

    Ahn, Yong Jin; Choi, Young Woo [Youho Elec. Ind. Co., LTD. (Korea)

    2002-07-01

    A relaying board is developed for the study of digital relay, which is based on digital Signal Processor(DSP). The present development is capable of understanding and application for digital relay hardware. To support the design of relaying hardware, first A/D convertor, MMI and serial port for communication are embedded, and next a booting cables of three types are supplied. More particularly the relaying board that is convenient to test digital relaying algorithm. This paper concludes by into a relaying board. The hardware test results show practically high performance. (author). 35 refs., 10 figs.

  20. Wavelet Kernels on a DSP: A Comparison between Lifting and Filter Banks for Image Coding

    Science.gov (United States)

    Gnavi, Stefano; Penna, Barbara; Grangetto, Marco; Magli, Enrico; Olmo, Gabriella

    2002-12-01

    We develop wavelet engines on a digital signal processors (DSP) platform, the target application being image and intraframe video compression by means of the forthcoming JPEG2000 and Motion-JPEG2000 standards. We describe two implementations, based on the lifting scheme and the filter bank scheme, respectively, and we present experimental results on code profiling. In particular, we address the following problems: (1) evaluating the execution speed of a wavelet engine on a modern DSP; (2) comparing the actual execution speed of the lifting scheme and the filter bank scheme with the theoretical results; (3) using the on-board direct memory access (DMA) to possibly optimize the execution speed. The results allow to assess the performance of a modern DSP in the image coding task, as well as to compare the lifting and filter bank performance in a realistic application scenario. Finally, guidelines for optimizing the code efficiency are provided by investigating the possible use of the on-board DMA.

  1. Sensitivity studies of beam directionality, beam size, and neutron spectrum for a fission converter-based epithermal neutron beam for boron neutron capture therapy.

    Science.gov (United States)

    Sakamoto, S; Kiger, W S; Harling, O K

    1999-09-01

    Sensitivity studies of epithermal neutron beam performance in boron neutron capture therapy are presented for realistic neutron beams with varying filter/moderator and collimator/delimiter designs to examine the relative importance of neutron beam spectrum, directionality, and size. Figures of merit for in-air and in-phantom beam performance are calculated via the Monte Carlo technique for different well-optimized designs of a fission converter-based epithermal neutron beam with head phantoms as the irradiation target. It is shown that increasing J/phi, a measure of beam directionality, does not always lead to corresponding monotonic improvements in beam performance. Due to the relatively low significance, for most configurations, of its effect on in-phantom performance and the large intensity losses required to produce beams with very high J/phi, beam directionality should not be considered an important figure of merit in epithermal neutron beam design except in terms of its consequences on patient positioning and collateral dose. Hardening the epithermal beam spectrum, while maintaining the specific fast neutron dose well below the inherent hydrogen capture dose, improves beam penetration and advantage depth and, as a desirable by-product, significantly increases beam intensity. Beam figures of merit are shown to be strongly dependent on beam size relative to target size. Beam designs with J/phi approximately 0.65-0.7, specific fast neutron doses of 2-2.6x10(-13) Gy cm2/n and beam sizes equal to or larger than the size of the head target produced the deepest useful penetration, highest therapeutic ratios, and highest intensities.

  2. CERN PSB Beam Tests of CNAO Synchrotron's Digital LLRF

    CERN Document Server

    Angoletta, M E; De Martinis, C; Falbo, L; Findlay, A; Foglio, R; Hunt, S; Tourres, D; Vescovi, C

    2008-01-01

    The Italian National Centre for Oncological hAdrontherapy (CNAO), in its final construction phase, uses proton and carbon ion beams to treat patients affected by solid tumours. At the heart of CNAO is a 78- meter circumference synchrotron that accelerates particles to up to 400 MeV/u. The synchrotron relies on a digital LLRF system based upon Digital Signal Processors (DSPs) and Field Programmable Gate Array (FPGA). This system implements cavity servoing and beam control capabilities, such as phase and radial loops. Beam tests of the CNAO synchrotron LLRF system were carried out at CERN's Proton Synchrotron Booster (PSB) in autumn 2007, to verify the combined DSP/FPGA architecture and the beam control capabilities. For this, a prototype version of CNAO's LLRF system was adapted to the PSB requirements. This paper outlines the prototype system layout and describes the tests carried out and their results. In particular, system architecture and beam control capabilities were successfully proven by comparison wit...

  3. Application of diamond based beam loss monitors at LHC

    Energy Technology Data Exchange (ETDEWEB)

    Hempel, Maria

    2013-04-15

    the LHC, especially near each quadrupole and next to collimators. Ionization chambers have a time resolution of 40 s that is a half LHC turn and in case of a large beam loss, they request a beam dump. Another type of beam loss monitors are diamond sensors because of a time resolution of about one nanosecond and high radiation hardness. One diamond detector system is located in the cleaning region of the LHC and is able to detect various types of beam losses. Another diamond detector system (BCM1F) is installed inside the CMS detector to protect the CMS from adverse beam conditions. BCM1F monitors also the luminosity during collisions and delivers important beam parameters. Additional condition monitors, based on the BCM1F system, are located next to CMS, near to LHCb and ALICE to measure large beam losses in the LHC ring. The process of a beam loss due to dust particles is explained, and additional simulations were done to understand these process in more detail. The result of the simulation are also given. Beam loss data recorded by the diamond sensors in the cleaning region and the BCM1F diamonds are presented.

  4. 基于DWT-SVD和DSP的数字图像加密算法实现%IMPLEMENTATION OF DIGITAL IMAGE ENCRYPTION ALGORITHM BASED ON DWT-SVD AND DSP

    Institute of Scientific and Technical Information of China (English)

    王永皎; 王川

    2013-01-01

    In order to solve the security problem of digital images in communication channel transmission, we propose a new digital image encryption algorithm based on DWT-SVD. Singular value of the image has good irreversibility against the geometric attacks, and after mathematical transformation, the image centroid will not change. Based on the above analyses, in this paper we dwell on the designing idea of the DWT-SVD algorithm, and present the implementation steps of the algorithm. The DWT-SVD algorithm could be implemented on the constructed platform of image processing system based on DSP, and through the experimental test we can find that the DWT-SVD algorithm could well fight against geometric attack in communication channel, thereby ensure the security, invisibility and robustness of the images transmitted in the channel.%针对数字图像在信道传输中存在的安全性问题,提出DWT-SVD数字图像加密算法.在分析奇异值对几何攻击具有良好的不变性,以及图像质心在交换前后具有一一对应关系的基础上,详细阐述DWT-SVD算法的设计思想,同时给出算法的实现步骤.在构建的DSP图像处理系统平台上进行算法的实现,并通过实验测试得出,DWT-SVD算法可以很好地抗击信道中的几何攻击,从而保证了图像在信道中传输的安全性、隐蔽性和鲁棒性.

  5. Automatic Computer Algorithms for Beam-based Setup of the LHC Collimators

    CERN Document Server

    Valentino, G; Assmann, R W; Bruce, R; Redaelli, S; Salvachua, B; Wollmann, D

    2012-01-01

    Beam-based setup of the LHC collimators is necessary to establish the beam centers and beam sizes at the collimator locations and determine the operational settings during various stages of the LHC machine cycle.

  6. Design of a neutrino source based on beta beams

    Directory of Open Access Journals (Sweden)

    E. Wildner

    2014-07-01

    Full Text Available “Beta beams” produce collimated pure electron (antineutrino beams by accelerating beta active ions to high energies and having them decay in a racetrack shaped storage ring of 7 km circumference, the decay ring. EUROnu beta beams are based on CERN infrastructures and existing machines. Using existing machines may be an advantage for the cost evaluation, but will also constrain the physics performance. The isotope pair of choice for the beta beam is ^{6}He and ^{18}Ne. However, before the EUROnu studies one of the required isotopes, ^{18}Ne, could not be produced in rates that satisfy the needs for physics of the beta beam. Therefore, studies of alternative beta emitters, ^{8}Li and ^{8}B, with properties interesting for a beta beam have been proposed and have been studied within EUROnu. These alternative isotopes could be produced by using a small storage ring, in which the beam traverses a target, creating the ^{8}Li and ^{8}B isotopes. This production ring, the injection linac and the target system have been evaluated. Measurements of the cross section of the reactions to produce the beta beam isotopes show interesting results. A device to collect the produced isotopes from the target has been developed and tested. However, the yields of ^{8}Li and ^{8}B, using the production ring for production of ^{8}Li and ^{8}B, is not yet, according to simulations, giving the rates of isotopes that would be needed. Therefore, a new method of producing the ^{18}Ne isotope has been developed and tested giving good production rates. A 60 GHz ECRIS prototype, the first in the world, was developed and tested for ion production with contributions from EUROnu. The decay ring lattices for the ^{8}Li and ^{8}B have been developed and the lattice for ^{6}He and ^{18}Ne has been optimized to ensure the high intensity ion beam stability.

  7. Accelerator Based Neutron Beams for Neutron Capture Therapy

    Energy Technology Data Exchange (ETDEWEB)

    Yanch, Jacquelyn C.

    2003-04-11

    The DOE-funded accelerator BNCT program at the Massachusetts Institute of Technology has resulted in the only operating accelerator-based epithermal neutron beam facility capable of generating significant dose rates in the world. With five separate beamlines and two different epithermal neutron beam assemblies installed, we are currently capable of treating patients with rheumatoid arthritis in less than 15 minutes (knee joints) or 4 minutes (finger joints) or irradiating patients with shallow brain tumors to a healthy tissue dose of 12.6 Gy in 3.6 hours. The accelerator, designed by Newton scientific Incorporated, is located in dedicated laboratory space that MIT renovated specifically for this project. The Laboratory for Accelerator Beam Applications consists of an accelerator room, a control room, a shielded radiation vault, and additional laboratory space nearby. In addition to the design, construction and characterization of the tandem electrostatic accelerator, this program also resulted in other significant accomplishments. Assemblies for generating epithermal neutron beams were designed, constructed and experimentally evaluated using mixed-field dosimetry techniques. Strategies for target construction and target cooling were implemented and tested. We demonstrated that the method of submerged jet impingement using water as the coolant is capable of handling power densities of up to 6 x 10(sup 7) W/m(sup 2) with heat transfer coefficients of 10(sup 6)W/m(sup 2)-K. Experiments with the liquid metal gallium demonstrated its superiority compared with water with little effect on the neutronic properties of the epithermal beam. Monoenergetic proton beams generated using the accelerator were used to evaluate proton RBE as a function of LET and demonstrated a maximum RBE at approximately 30-40 keV/um, a finding consistent with results published by other researchers. We also developed an experimental approach to biological intercomparison of epithermal beams and

  8. Control of an electrowetting-based beam deflector

    Science.gov (United States)

    de Boer, Bart; Suijver, Freek; Megens, Mischa; Deladi, Szabolcs; Kuiper, Stein

    2010-03-01

    We experimentally demonstrate the feasibility of a small, low-power beam deflector based on electrowetting. The beam deflector deflects light by refraction at the flat interface (meniscus) between two immiscible and density-matched liquids, namely, a nonpolar oil mixture and an aqueous salt solution. The liquids are contained in a square pyramidal frustum with electrode-covered faces. The electrodes can be separately driven by voltage sources in order to control the contact angle between the meniscus and the frustum faces. By controlling the voltage on all four electrodes, a flat meniscus is obtained that can be tilted independently in two perpendicular directions. We present a capacitance-based feedback driving scheme and demonstrate that it can be used for accurate control of the meniscus shape and tilt. Independent, continuous, and accurate beam steering through an angle of ±6° was achieved on two deflection axes.

  9. Texas Instruments-Digital Signal Processor(TI-DSP)SMJ320F20 SEL Testing

    Science.gov (United States)

    Sanders, Anthony B.; Poivey, C.; Kim, H. S.; Gee, George B.

    2006-01-01

    This viewgraph presentation reviews the testing of the Texas Instrument Digital Signal Processor(TI-DSP)SMJ320F20. Tests were performed to screen for susceptibility to Single Event Latchup (SEL) and measure sensitivity as a function of Linear Energy Transfer (LET) for an application specific test setup. The Heavy Ion Testing of two TI-DSP SMJ320F240 devices experienced Single Event Latchup (SEL) conditions at an LET of 1.8 MeV/(mg/square cm) The devices were exposed from a fluence of 1.76 x l0(exp 3) to 5.00 x 10(exp 6) particles/square cm of the Neon, Argon and Krypton ion beams. For DI(sub DD) an average latchup current occurred at about 700mA, which is a magnitude of 10 over the nominal current of 700mA.

  10. A simple clockless Network-on-Chip for a commercial audio DSP chip

    DEFF Research Database (Denmark)

    Stensgaard, Mikkel Bystrup; Bjerregaard, Tobias; Sparsø, Jens;

    2006-01-01

    We design a very small, packet-switched, clockless Network-on-Chip (NoC) as a replacement for the existing crossbar-based communication infrastructure in a commercial audio DSP chip. Both solutions are laid out in a 0.18 um process, and compared in terms of area, power consumption and routing...

  11. The Research of Maximum Power Point Tracking of Photovoltaic Based on DSP%基于DSP的光伏最大功率跟踪技术的研究

    Institute of Scientific and Technical Information of China (English)

    靳海亮; 付周兴

    2013-01-01

    光伏电池的最大功率点受光照强度、环境温度和负载大小等外界因素的影响而不断变化,因此很有必要对光伏电池的最大功率点进行时时跟踪以提高光伏电池的利用率.以分析光伏电池输出特性为基础,在实验室环境下用直流电源和可变电阻来模拟光伏电池,并选择Boost电路实现DC/DC变换来搭建实验电路;同时该实验采用DSP(TMS320F2812)作为控制器来进行最大功率跟踪算法的控制.实验结果表明,该方法可以有效地完成光伏的最大功率跟踪.%Maximum power point of photovoltaic cell is changing with the changes of light intensity, ambient temperature and load size, and other external factors, so it is necessary always to track maximum power point of the photovoltaic cells to improve the utilization of photovoltaic cells. Based on the analysis of the output characteristics of photovoltaic cells, experimental circuit is set up in the lab environment which uses DC power supply and variable resistor to simulate the photovoltaic cells, and selects the Boost circuit to realize the DC/DC transform; and the ex periment uses TMS320F2812 as the controller to control the algorithm of maximum power point tracking. The experimental results show that this method can effectively complete the photovoltaic maximum power point tracking.

  12. 基于单核 DS P实时多任务宏观并行软件架构%Real-time Multitasking Macro Parallel Software Architecture Based on Single-core DSP

    Institute of Scientific and Technical Information of China (English)

    周敬东; 黄云朋; 周明刚; 李敏慧; 程钗

    2015-01-01

    The serial task execution mode is used in most of the existing single‐core embedded systems .The system can not respond to other tasks quickly and effectively , during the execution of complex tasks . A real‐time multitasking macro parallel software architecture based on single‐core DSP is designed by splitting for the complex task ,reducing the use of system latency program and querying task marks to scheduling task .The experiment test show that rapid task responding in complex multitasking system can meet the request of instantaneity ,stability of the system and multitask parallel at the macroscopic level .%现有单核嵌入式系统大多采用的是串行任务执行方式,系统在复杂任务执行过程中,不能快速有效地响应其他任务。通过对复杂任务的拆分以限制单个任务执行时间,减少系统延时程序的使用,以及使用查询任务标志调度任务等方法,设计并实现了一种基于单核DSP的实时多任务宏观并行软件架构。实际应用系统的试验验证了该软件架构在复杂多任务系统中任务响应快,可满足系统实时性要求,能够保证系统稳定运行。

  13. Research on 1 kW Single-Phase Photovoltaic Grid-Connected Phase-Locked Technology Based on DSP%基于DSP的1 kW单相光伏并网锁相技术的研究

    Institute of Scientific and Technical Information of China (English)

    许军; 郑绍陆; 唐传鋆; 耿力

    2014-01-01

    As to the problem,PV( Photo-Voltage) grid-connected distributed power supply system's phase locking, this paper proposes a photovoltaic grid-connected system's digital phase-locked algorithm and program flow design based on DSP. According to the relationship between the period and phase of the cycle of adjustment,the control cycle and phase locking are realized. By this method,conveniently the grid voltage and PV power generation output current signal and the objectives of signal capture and phase-locked are realized. Finally,implement of the prototype and the experimental results proved that the method is accurate. The design ensures PLL method accuracy,reliability and practicability of the PV grid-connected system.%针对光伏分布式电源并网系统锁相技术的问题,采用了一种基于DSP的光伏并网系统的数字锁相算法和程序流程设计,根据周期和相位的关系,通过调整周期来实现周期和相位的控制和锁定,方便地实现了对电网电压和光伏发电输出电流信号捕获和锁相的目的。最后制作样机并通过实验证明,该锁相方法设计准确,锁相精度高,保证了光伏并网系统的可靠性和实用性。

  14. 基于DSP的光伏并网技术的研究与实现%The Research and Realization of PV Grid-Connected Technology Based on DSP

    Institute of Scientific and Technical Information of China (English)

    宗艳玲; 薛士龙; 王东

    2012-01-01

    In the system of photovoltaic grid-connected generation, the phase-locked loop (PLL) technology must be adopted to ensure the grid-connected current and the grid voltage strictly in the same frequency and phase, in order to avoid the grid pollution caused by the grid-connected current. In this paper, a new strategy for the software PLL technology is proposed, based on the hardware circuit of grid voltage zero-crossing detection. Then the experiment has been done by programming in the software of CCS3.3 and using TMS320F2812, a kind of DSP chip, as the controlling chip. The experimental results are presented to demonstrate that the grid voltage can be traced effectively by grid-connected current with the proposed strategy.%在光伏并网发电系统中,为了避免所发电能并入电网后造成电网污染,必须使用锁相环(PLL--Phase-Locked Loop)技术,保证并网电流和电网电压严格同频同相。文中针对软件锁相环技术,提出了一种基于电网电压过零检测硬件电路的新方法,并在CCS3.3软件中编写程序,以DSP芯片TMS320F2812为控制芯片进行了实验验证。实验结果表明此锁相环方案可以快速准确地使并网电流跟踪电网电压。

  15. 基于DSP和C语言的变压器振动信号采集与分析系统%Transformer vibration signal acquisition and analysis system based on DSP and C language

    Institute of Scientific and Technical Information of China (English)

    陶新民; 李震; 姜述杰

    2015-01-01

    电力变压器作为电力设备的枢纽具有重要的作用. 变压器器身的振动信号含有丰富的运行状况信息. 文中设计了基于DSP的多路振动信号采集板和基于C语言的上位机软件,利用该系统能够实时准确地采集到变压器器身各部位的振动状况;同时在上位机软件上利用小波包分析对变压器振动信号的频段-能量分布进行分析,可以提取变压器故障诊断的判决特征值.%A power transformer as the hub of power equipment plays an important role, and the vibration signals of the transformer body have rich transformer' s operation status information. This paper designed the multi-channel vi-bration signal acquisition board based on DSP and the PC software programmed by C language. This system can col-lect each part of the transformer body' s real-time vibration condition correctly;at the same time, the wavelet pack-et is used to analyze the frequency bands-energy distribution of the transformer' s vibration signal, and then the fea-tures of the transformer fault diagnosis can be calculated effectively.

  16. DSP implementation of the Cholesky factorisation

    OpenAIRE

    Winqvist, Arvid

    2014-01-01

    The Cholesky factorisation is an efficient tool that, when used correctly, significantlycan reduce the computational complexity in many applications. This thesiscontains an in-depth study of the factorisation, some of its applications andan implementation on the Coresonic SIMT DSP architecture. Choleskyfaktoriseringen är ett effektivt verktyg som, när det används korrekt, signifikantkan minska beräkningskomplexiteten i många applikationer. Detta examensarbeteinnehåller en ingående studie ...

  17. DSP Specific Optimized Implementation of Viterbi Decoder

    Directory of Open Access Journals (Sweden)

    Yame Asfia

    2010-04-01

    Full Text Available Due to the rapid changing and flexibility of Wireless Communication protocols, there is a desire to move from hardware to software/firmware implementation in DSPs. High data rate requirements suggest highly optimized firmware implementation in terms of execution speed and high memory requirements. This paper suggests optimization levels for the implementation of a viable Viterbi decoding algorithm (rate ½ on a commercial off-the-shelf DSP.

  18. Shear resistance of beams based on the effective shear depth

    NARCIS (Netherlands)

    Pruijssers, A.F.

    1986-01-01

    Despite extensive experimental and theoretical studies the shear resistance of beams with longitudinal reinforcement is described by empirical expressions. A reliable empirical formula is derived by Rafla [10]. This formula is based on 442 experimental results. In this report no experiments are

  19. Research on High Frequency Inverter Resistance Spot Welding Power Supply Base on DSP%基于DSP的高频逆变电阻点焊电源的研究

    Institute of Scientific and Technical Information of China (English)

    曾敏; 魏良红; 马成; 曹彪

    2011-01-01

    微型零件的焊接要求焊接电源有较高的控制精度和良好的动态特性,必须提高电源设备的精密性和稳定性以提高焊接质量.因此,设计出基于数字信号处理器(Digital signal processing,DSP)的高频逆变电阻点焊电源.该电源以DSPIC30F6010A为控制核心,逆变主电路采用有限双极性的控制方式,通过调节脉冲宽度调制(Pulse width modulation,PWM)占空比来实现对输出电流的调节.调节控制中使用限制增量的比例积分(Proportion integration,PI)调节,以保证PWM调节的控制精度,并通过改变PI参数来得到3段焊接电流,实现焊接电流的精确调节.介绍电源控制系统的组成部分、有限双极性的工作原理,详述数字PWM的生成以及数字PI调节的方法,并通过试验进行验证.在试验中检测逆变电路的驱动电压波形,并获得设置不同参数时稳定输出的电压、电流波形.结果表明,该电源控制系统稳定可靠,具有较高的控制精度和较快的响应速度.焊接产品性能优良,达到了预期的焊接工艺要求.%The welding of micro-components requires the welding power source to have high control accuracy and excellent dynamic characteristics. The precision and stability of the resistance spot welding power must be promoted so that the welding quality can be improved. Therefore, the high frequency inverter resistance spot welding power supply based on DSP is designed. dsPIC30F6010A is the control core of the power. The limited bipolar control scheme is used in the main inverter circuit. PWM is adopted to adjust welding current features. Limited Increment Form PI is also used in the control system to improve the precision of PWM control. The PI parameters are changed continuously to produce three-segment current, so the welding current can be precisely adjusted. The components of the power control system and the working principle of the limited bipolar control are introduced. The digital PWM

  20. DSP accelerator for the wavelet compression/decompression of high- resolution images

    Energy Technology Data Exchange (ETDEWEB)

    Hunt, M.A.; Gleason, S.S.; Jatko, W.B.

    1993-07-23

    A Texas Instruments (TI) TMS320C30-based S-Bus digital signal processing (DSP) module was used to accelerate a wavelet-based compression and decompression algorithm applied to high-resolution fingerprint images. The law enforcement community, together with the National Institute of Standards and Technology (NISI), is adopting a standard based on the wavelet transform for the compression, transmission, and decompression of scanned fingerprint images. A two-dimensional wavelet transform of the input image is computed. Then spatial/frequency regions are automatically analyzed for information content and quantized for subsequent Huffman encoding. Compression ratios range from 10:1 to 30:1 while maintaining the level of image quality necessary for identification. Several prototype systems were developed using SUN SPARCstation 2 with a 1280 {times} 1024 8-bit display, 64-Mbyte random access memory (RAM), Tiber distributed data interface (FDDI), and Spirit-30 S-Bus DSP-accelerators from Sonitech. The final implementation of the DSP-accelerated algorithm performed the compression or decompression operation in 3.5 s per print. Further increases in system throughput were obtained by adding several DSP accelerators operating in parallel.

  1. Beam halo definitions based upon moments of the particle distribution

    Directory of Open Access Journals (Sweden)

    C. K. Allen

    2002-12-01

    Full Text Available Two different parameters for the quantitative description of beam halo are discussed. Both are based on moments of the particle distribution and represent a convenient and model-independent method for quantifying the magnitude of beam halo observed in either spatial or phase-space projections. One parameter is a measure of spatial profile of the beam and has been defined by Wangler and Crandall previously. The current authors defined a new parameter using kinematic invariants to quantify halo formation in 2D phase space. Here we expand the development and present detailed numerical results. Although the spatial-profile parameter and the phase-space halo parameter both reduce to the same value when the distribution has the elliptical symmetry, in general these parameters are not equal. Halo in the 1D spatial profiles is relatively easily measured, but is variable as the beam distribution evolves and can hide as it rotates in phase space. The 2D phase-space halo is more difficult to measure, but it varies more smoothly as the halo evolves. It provides a more reliable characterization of the halo as an intrinsic property of the beam.

  2. Tutorial on beam-based feedback systems for linacs

    Energy Technology Data Exchange (ETDEWEB)

    Hendrickson, L.; Allison, S.; Gromme, T.; Grossberg, P.; Himel, T.; Krauter, K.; MacKenzie, R.; Ross, M.; Sass, R.; Shoaee, H.

    1994-08-01

    A generalized fast feedback system stabilizes beams in the SLC. It performs measurements and modifies actuator settings to control beam states such as position, angle, energy and intensity on a pulse to pulse basis. An adaptive cascade feature allows communication between a series of linac loops, avoiding overcorrection problems. The system is based on the state space formalism of digital control theory. Due to the database-driven design, new loops are added without requiring software modifications. Recent enhancements support the monitoring and control of nonlinear states such as beam phase using excitation techniques. In over three years of operation, the feedback system has grown from its original eight loops to more than fifty loops, and it has been invaluable in stabilizing the machine.

  3. Electron Beam Diagnostic Based on a Short Seeded FEL

    CERN Document Server

    Graves, W; Kaertner, Franz X; Zwart, T

    2005-01-01

    The optical properties of an FEL amplifier are sensitively dependent on the electron beam current profile, energy spread, and transverse emittance. In this paper we consider using a short FEL amplifier operating on a low harmonic of a visible-IR input seed as a mildly destructive electron beam diagnostic able to measure these properties for sub-ps time slices. The optical methods are described as well as a planned implementation of the device for the FERMI@Elettra XUV FEL under construction at Sincrotrone Trieste, including its fiber-based seed laser closely coupled with the facility timing system, undulator parameters, and requirements on the electron and FEL pulses. This diagnostic is conveniently integrated with a "laser heater" designed to increase the very low electron beam energy spread produced by a photoinjector in order to avoid space charge and coherent synchrotron radiation instabilities.

  4. Application of DSP Blackfin in data acquisition of high speed

    Science.gov (United States)

    Tang, Chao

    2015-12-01

    In the traditional digital collection, the use of FIFO and MCU is usually used. Traditional data acquisition systems are expensive and slow, When the input is a fast changing signal, the output will have a large distortion, which makes the whole system performance degradation, and not suitable for large amounts of data. In this paper, a new method of high speed data acquisition based on Blackfin DSP is presented, The analog signal is processed by the signal processing circuit, so that the amplitude of the signal is limited to the input range of the A/D converter. The whole collection system is determined by the data acquisition and control circuit. In order to further improve the speed of data transmission, DSP Blackfin uses advanced DMA technology. In the algorithm, the system is mainly used in the same sampling points for the average value of the method. Experimental results show, Using the traditional system, it will lose a lot of details, the destruction of the integrity of the signal. Using this system can well reconstruct the analog signal input, Especially in the large amount of data, it shows the incomparable advantages.

  5. Implementation of Cascaded H-Bridge Multilevel Inverter using MATLAB-DSP (ezDSP28335 Interfacing

    Directory of Open Access Journals (Sweden)

    W. Razia Sultana

    2014-05-01

    Full Text Available This study demonstrates, the generation of triggering signals using SPWM technique for a seven level H-Bridge cascaded inverter with the help of MATLAB-DSP (ezDSP 28335 interfacing without using EPWM block and presents the final output of the inverter. The focus is mainly on hardware implementation of Cascaded H-Bridge MLI using MATLAB-DSP interfacing. Generation of triggering signals using MATLAB-DSP interfacing has been explained briefly. Use of GPIO block in SIMULINK model makes the triggering signal generation easier and more efficient. The switching control signals required for triggering of switches are generated using MATLAB-DSP (ezDSP 28335 interfacing. This approach exploits the advantages of block programming in SIMULINK.

  6. Bilayer Beams and Relay Sharing based OFDMA Cellular Architecture

    Directory of Open Access Journals (Sweden)

    Yanxiong Pan

    2011-08-01

    Full Text Available Over the past decade, researchers have been putting a lot of energy on co-channel interference suppression in the forthcoming fourth generation (4G wireless networks. Existing approaches to interference suppression are mainly based on signal processing, cooperative communication or coordination techniques. Though good performance has been attained already, a more complex receiver is needed, and there is still room for improvement through other ways.Considering spatial frequency reuse, which provides an easier way to cope with the co-channel interference, this paper proposed a bilayer beams and relay sharing based (BBRS OFDMA cellular architecture and corresponding frequency planning scheme. The main features of the novel architecture are as follows. Firstly, the base station (BS uses two beams, one composed of six wide beams providing coverage to mobile stations (MSs that access to the BS, and the other composed of six narrow beams communicating with fixed relay stations (FRSs. Secondly, in the corresponding frequency planning scheme, soft frequency reuse is considered on all FRSs further. System-level simulation results demonstrate that better coverage performance is obtained and the mean data rate of MSs near the cell edge is improved significantly. The BBRS cellular architecture provides a practical method to interference suppression in 4G networks since a better tradeoff between performance and complexity is achieved.

  7. An Application of PSV-S in Fast Development of a Real-Time DSP System

    Directory of Open Access Journals (Sweden)

    Armein Z.R. Langi

    2016-09-01

    Full Text Available Virtual prototyping is natural in developing digital signal processing (DSP systems using a product-service-value system (PSV-S approach. Our DSP virtual prototyping approach consists of four development phases: (1 a generic DSP system, (2 a functional DSP system, (3 an architectural DSP system, and (4 a real-time DSP system. Such an approach results in a more comprehensive approach in the DSP system development. This paper shows an example of prototyping a voice codec on a single-chip DSP processor.

  8. 基于DSP和ARM的穿墙探测雷达数据处理终端设计%Design of Data Processing Terminal for Through-wall Detecting Radar based on DSP and ARM

    Institute of Scientific and Technical Information of China (English)

    陈敏; 欧阳缮; 蒋俊杰

    2010-01-01

    提出了一种基于DSP+ARM嵌入式双处理器平台的雷达数据处理终端设计方案.详细阐述了该数据处理终端系统的软硬件结构、各模块的工作机制以及DSP+ARM平台中双口RAM数据接口电路设计.实践证明,系统中DSP模块和ARM模块能较好地配合协同工作,完成雷达回波数据的实时采集、定位算法处理、目标信息显示以及系统控制等功能.

  9. Beam splitting target reflector based compensation for angular drift of laser beam in laser autocollimation of measuring small angle deviations.

    Science.gov (United States)

    Zhu, Fan; Tan, Jiubin; Cui, Jiwen

    2013-06-01

    Beam splitting target reflector based compensation for the angular drift of laser beam in laser autocollimation is proposed in this article to improve the measurement accuracy and stability of small angle deviations. A beam splitting target reflector is used to replace the plane mirror in laser autocollimation to generate a reference beam when returning the measurement beam. The reference beam and measurement beam have the same angular drift, but have different sensitivities to the rotation angle of the reflector due to the unique characteristics of the reflector. Thus, the angular drift of laser beam in laser autocollimation can be compensated in real time by using the drift of reference beam. Experimental results indicate that an output stability of 0.085 arc sec in 2 h can be achieved after compensation. And a measurement accuracy of ±0.032 arc sec can be obtained over the range of ±1190 arc sec with an effective resolution of 0.006 arc sec. It is confirmed that the compensation method for the angular drift of laser beam is necessary for improving the measurement accuracy and stability in laser autocollimation.

  10. Beam splitting target reflector based compensation for angular drift of laser beam in laser autocollimation of measuring small angle deviations

    Energy Technology Data Exchange (ETDEWEB)

    Zhu Fan; Tan Jiubin; Cui Jiwen [Center of Ultra-precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin 150080 (China)

    2013-06-15

    Beam splitting target reflector based compensation for the angular drift of laser beam in laser autocollimation is proposed in this article to improve the measurement accuracy and stability of small angle deviations. A beam splitting target reflector is used to replace the plane mirror in laser autocollimation to generate a reference beam when returning the measurement beam. The reference beam and measurement beam have the same angular drift, but have different sensitivities to the rotation angle of the reflector due to the unique characteristics of the reflector. Thus, the angular drift of laser beam in laser autocollimation can be compensated in real time by using the drift of reference beam. Experimental results indicate that an output stability of 0.085 arc sec in 2 h can be achieved after compensation. And a measurement accuracy of {+-}0.032 arc sec can be obtained over the range of {+-}1190 arc sec with an effective resolution of 0.006 arc sec. It is confirmed that the compensation method for the angular drift of laser beam is necessary for improving the measurement accuracy and stability in laser autocollimation.

  11. LEDA beam diagnostics instrumentation: Beam position monitors

    Science.gov (United States)

    Barr, D.; Day, L.; Gilpatrick, J. D.; Kasemir, K.-U.; Martinez, D.; Power, J. F.; Shurter, R.; Stettler, M.

    2000-11-01

    The Low Energy Demonstration Accelerator (LEDA) facility located at Los Alamos National Laboratory (LANL) accelerates protons to an energy of 6.7 MeV and current of 100 mA operating in either a pulsed or cw mode. Of key importance to the commissioning and operations effort is the Beam Position Monitor system (BPM). The LEDA BPM system uses five micro-stripline beam position monitors processed by log ratio processing electronics with data acquisition via a series of custom TMS320C40 Digital Signal Processing (DSP) boards. Of special interest to this paper is the operation of the system, the log ratio processing, and the system calibration technique. This paper will also cover the DSP system operations and their interaction with the main accelerator control system.

  12. Leda Beam Diagnostics Instrumentation Beam Position Monitors

    CERN Document Server

    Barr, D

    2000-01-01

    The Low Energy Demonstration Accelerator (LEDA) facility located at Los Alamos National Laboratory (LANL) accelerates protons to an energy of 6.7-MeV and current of 100-mA operating in either a pulsed or cw mode. Of key importance to the commissioning and operations effort is the Beam Position Monitor system (BPM). The LEDA BPM system uses five micro-stripline beam position monitors processed by log ratio processing electronics with data acquisition via a series of custom TMS32OC40 Digital Signal Processing (DSP) boards. Of special interest to this paper is the operation of the system, the log ratio processing, and the system calibration technique. This paper will also cover the DSP system operations and their interaction with the main accelerator control system.

  13. Permanent Magnet Brushless DC Motor Position Servo Control System Based on DSP%基于DSP永磁无刷直流电动机位置伺服系统

    Institute of Scientific and Technical Information of China (English)

    薛迎成; 潘俊民; 潘志扬

    2001-01-01

    介绍一种基于数字信号处理(DSP)无刷直流电动机位置伺服系统.该系统充分利用了DSP周边端口丰富,运算速度快的特点.使系统硬件结构简单,实验表明,系统具有良好的定位性能.

  14. 基于DSP的无刷直流电动机控制系统设计%A Design of Control System Based on DSP for Brushless DC Motor

    Institute of Scientific and Technical Information of China (English)

    王敏荣; 楼顺天

    2006-01-01

    无刷直流(Brushless DC)电动机以其结构简单、性能优越的特点得到广泛应用.论文应用Microchip公司一款DSP(dsPIC30F2010)设计了无刷直流电动机控制系统;详细介绍了该电动机控制系统的硬件结构及软件流程.

  15. Improved Real-time Implementation of Adaptive Gassian Mixture Model-based Object Detection Algorithm for Fixed-point DSP Processors

    Institute of Scientific and Technical Information of China (English)

    Byung-eun LEE; Thanh-binh NGUYEN; Sun-tae CHUNG

    2010-01-01

    Foreground moving object detection is an important pocess in various computer vision applicatipons such as intelligent visual sur-veillance,HCI,object-based video compression,etc.One of the most successful moving object detection algorithms is based on Adaptive Gaussian Mixture Model (AGMM).Although AGMM-based object detection shows very good performance with respect to object detection accuracy,AGMM is very complex model requiring lots of floating-point arithmetic so that it should pay for expensive computational cost.Thus,direa implementation of the AGMM-based object detec-tion for embedded DSPs without floating-point arithmetic HW support cannot satisfy the real-time processing requirement.This paper pre-sents a navel real-time implementation of adaptive Gaussian mixture model-based moving object detection algorithm for fixed-point DSPs.In the proposed implementation,in addition to changes of data types into fixed- point ones,magnification of the Gaussian distribution tech nique is introduced so that the integer and fixed-point arithmetic can be easily and consistently utilized instead of real number and floating-point arithmetic in processing of AGMM algorithm.Experimental re-sults shows that the proposed implementation have a high potential in real-time applications.

  16. An Improved Design for Parameter Binding Based on TMS320F2812DSP%一种基于TMS320F2812DSP的参数装订改进设计

    Institute of Scientific and Technical Information of China (English)

    王娜; 周双彦; 刘佳; 胡振辉; 朱艳芳; 李艳娟; 杨茜; 郑学银

    2015-01-01

    针对基于 TMS320F2812DSP 参数装订过程中出现的问题,通过分析TMS320F2812DSP的存储器映像、片内Flash存储器的特点,以PC机和TMS320F2812DSP控制系统通过422串口通讯的过程为例,提出了一种在伺服电机控制过程中实现在线参数装订的设计方法.通过实例验证,该设计实现了参数的快速装订,提高了工作效率.%Aiming at the problems of TMS320F2812DSP parameter binding process,a design method was proposed to achieve on-line parameter binding by analyzing the memory map of TMS320F2812DSP and the characteristics of the on-chip flash memory.During the servo motor control process,the communication of computer and control system through the 422 serial interface were taken for example.Practice has proved that the improved design method achieved the parameter fast binding and improved work efficiency.

  17. Aperture and Receiver Technology. Delivery Order 0002: Bandwidth Invariant Spatial Processing. Volume 2. Digital Signal Processor (DSP) Based Implementation of Direction of Arrival (DOA) for Wideband Sources

    Science.gov (United States)

    2007-05-01

    ARM) family of general-purpose 32-bit microprocessors . The ARM architecture is based on Reduced Instruction Set Computer (RISC) principles. It is...Memories: mAgic SSRAM, ARM FLASH and ARM SRAM 28 • Stereo Audio CODECs (4 in + 4 out) • Serial I/O: • 1 USB 2.0 Full (12 Mbps) • 2 RS232/LVTTL

  18. Performance of the plugged-in 22Na based slow positron beam facility

    Institute of Scientific and Technical Information of China (English)

    WANG Ping; MA Yan-Yun; QIN Xiu-Bo; ZHANG Zhe; CAO Xing-Zhong; YU Run-Sheng; WANG Bao-Yi

    2008-01-01

    The Beijing intense slow positron beam facility is based on the 1.3 GeV linac of Beijing ElectronPositron CoUider (BEPC) aiming to produce mono-energetic intense slow positron beam for material science investigation. The plugged-in 22Na based slow positron beam section has been newly constructed to supply continuous beam time for the debugging of positron annihilation measurement stations and improve the Beijing intense slow positron beam time using efficiency. Performance testing result of the plugged-in 22Na based slow positron beam facility are reviewed in this paper, with the measurement of the beam transport efficiency, the view of beam spot, the adjustment of beam position, the measurement of beam intensity and energy spread etc. included.

  19. Damage identification in beams by a response surface based technique

    Directory of Open Access Journals (Sweden)

    Teidj S.

    2014-01-01

    Full Text Available In this work, identification of damage in uniform homogeneous metallic beams was considered through the propagation of non dispersive elastic torsional waves. The proposed damage detection procedure consisted of the following sequence. Giving a localized torque excitation, having the form of a short half-sine pulse, the first step was calculating the transient solution of the resulting torsional wave. This torque could be generated in practice by means of asymmetric laser irradiation of the beam surface. Then, a localized defect assumed to be characterized by an abrupt reduction of beam section area with a given height and extent was placed at a known location of the beam. Next, the response in terms of transverse section rotation rate was obtained for a point situated afterwards the defect, where the sensor was positioned. This last could utilize in practice the concept of laser vibrometry. A parametric study has been conducted after that by using a full factorial design of experiments table and numerical simulations based on a finite difference characteristic scheme. This has enabled the derivation of a response surface model that was shown to represent adequately the response of the system in terms of the following factors: defect extent and severity. The final step was performing the inverse problem solution in order to identify the defect characteristics by using measurement.

  20. A high dynamic Micro Strips Ionization Chamber featuring Embedded Multi DSP Processing

    CERN Document Server

    Voltolina, Francesco; Carrato, Sergio; 10.1109/NSSMIC.2004.1466924

    2010-01-01

    An X-ray detector will be presented that is the combination of a segmented ionization chamber featuring one-dimensional spatial resolution integrated with an intelligent ADC front-end, multi DSP processing and embedded PC platform. This detector is optimized to fan beam geometry with an active area of 192 mm (horizontal) and a vertical acceptance of 6 mm. Spatial resolution is obtained by subdividing the anode into readout strips, having pitch of 150 micrometers, which are connected to 20 custom made integrating VLSI chips (each capable of 64-channel read-out and multiplexing) and read out by 14 bits 10 MHz ADCs and fast adaptive PGAs into DSP boards. A bandwidth reaching 3.2Gbit/s of raw data, generated from the real time sampling of the 1280 micro strips, is cascaded processed with FPGA and DSP to allow data compression resulting in several days of uninterrupted acquisition capability. Fast acquisition rates reaching 10 kHz are allowed due to the MicroCAT structure utilized not only as a shielding grid in i...

  1. Practical considerations for the implantation of a fuzzy control algorithm in a DSP; Consideraciones practicas para la implantacion de un algoritmo de control difuso en un DSP

    Energy Technology Data Exchange (ETDEWEB)

    Perez C, B.; Benitez R, J.S.; Pacheco S, J.O. [ININ, 52045 Ocoyoacac, Estado de Mexico (Mexico)

    2003-07-01

    The development of a digital system based on a DSP to implant a Mamdani type algorithm of fuzzy control whose objective is to regulate the neutron power in a nuclear research reactor Type TRIGA Mark III is presented. Its are simultaneously carried out the aggregation des fuzzy stages discreeting the universe of the output variable. The format MPF for the handling of the floating point in the arithmetic operations is used. (Author)

  2. Measuring Luminescence Lifetime With Help of a DSP

    Science.gov (United States)

    Danielson, J. D. S.

    2009-01-01

    An instrument for measuring the lifetime of luminescence (fluorescence or phosphorescence) includes a digital signal processor (DSP) as the primary means of control, generation of excitation signals, and analysis of response signals. The DSP hardware in the present instrument makes it possible to switch among a variety of operating modes by making changes in software only.

  3. DSP for Lågeffekt Programvaredefinert Radio

    OpenAIRE

    2011-01-01

    Programvaredefinert radio (SDR) er ein ny måte å implementere radiosystem på. Hovudtanken er at delar av radioen som tidlegare har vore implementert med låste analoge og digitale løysingar skal erstattast med programvare som køyrer på ein prosessor. Dette kan forbetre mellom anna fleksibilitet, tilpassingsdyktigheit og produksjonskostnadar.Denne oppgåva tek for seg ein DSP-arkitektur spesielt tilpassa lågeffekt modulasjon og demodulasjon av radiosi...

  4. Modular version of SIMCON, FPGA based, DSP integrated, LLRF control system for TESLA FEL part I: SIMCON 3.0 motherboard

    Science.gov (United States)

    Pozniak, Krzysztof T.; Romaniuk, Ryszard S.; Kierzkowski, Krzysztof

    2006-03-01

    The paper includes a description of predicted functionalities to be implemented in a universal motherboard (MB) for the next generation of LLRF control system for TESLA. The motherboard bases on a number of quasi-autonomous embedded executive modules. The modules are implemented in a few FPGA chips featured by the MB. The paper presents a practical design of the MB. The initial (basic) solution of the MB has the Cyclone as the chip where the board management is embedded. The board features communication modules - VME and micro, single chip PC with Ethernet. The board provides power supply for the FPGA chips. The board has fast internal communication between particular modules. The described Motherboard serves for experiments with the SIMCON 3.0 system.

  5. 基于DSP的LTE TDD上行解传输预编码实现%Implementation of LTE TDD uplink transformation deprecoding based on DSP

    Institute of Scientific and Technical Information of China (English)

    李小文; 彭德义; 王丹

    2012-01-01

    在时分长期演进(time division-long term evolution,TD-LTE)系统中,为了保证上行传输单载波特性,采用集中式DFT-扩展-OFDM(discrete Fourier transform-spread OFDM)机制.对各种离散傅里叶逆变换(inverse discreteFourier transform,IDFT)算法性能仿真比较,通过对硬件性能及实现复杂度的评估,采用基于2-N点快速傅里叶变换(fast Fourier transform,FFT)算法和线性插值的符号抽选相结合的方法,提出一种上行解传输预编码的实现方案.仿真表明,该方法具备较高的输出信噪比的同时降低了实现复杂度,该方案已成功应用于TD-LTE无线综合测试仪器中.%In the TD-LTE (time division-long term evolution) system, Located DFT-Spread OFDM has been adopted in Uplink Transmission. According to the limitation of the length of IDFT sequence by 3GPP protocol, compared with a variety of performance of DFT/IDFT algorithms by simulating, this paper adopts a method of combining FFT algorithm based on 2-N point with symbol selecting of linear interpolation by evaluation of hardware performance and implementing complexity, and proposes an implementing scheme. Firstly, conjugate every troops of the sequence after equalization, then Fast Fourier transform it by adopting algorithm based on 2-N point and selecting the symbol by linear interpolating. Implementing flow chart and the efficiency of algorithm executing are presented, and feasibility and effectiveness of the proposed scheme is verified through the analysis of implementing complexity.

  6. DSP control system of waste heat generator excitation based on power angle stability%基于功角稳定的余热发电机励磁DSP控制系统

    Institute of Scientific and Technical Information of China (English)

    许强

    2012-01-01

    Compared with coal-fired power generation, steam pressure of waste heat power generation has the characteristic of mutation. Now the domestic waste heat generator excitation uses constant power factor regulating mode after connected with power grid. When steam pressure of steam turbine mutates, due to that active power mutation at the same direction, the generator power-angle will change at the same direction too. When power-angle is more than the allowable value, generator may be out-of-step parking. Three closed loop excitation control devices based on DSP is developed to solve this problem. When the steam pressure is greater than the maximum value, generator works at constant power angle. When the steam pressure is less than maximum value, generator works at constant power factor mode. Before connected with power grid, generator works at constant exciting current mode, so that the generator is always energy-saving and in reliable operation.%余热发电较普通火力发电具有蒸气压力易突变的特点,现在国内余热发电机励磁并网后多采用恒功率因数调节方式.当汽轮机蒸气压力突变瞬间,由于有功功率同向突变,发电机的功角也同向变化,当功角超过允许值时,发电机有可能失步停车.针对此问题开发了基于DSP的励磁三闭环控制系统.当蒸气压力大于最大值时,发电机工作于恒功角方式.当蒸气压力小于最大值时,发电机工作于恒功率因数方式.并网前发电机工作于恒励磁电流方式,从而保证了发电机始终处于既节能又可靠的运行状态.

  7. 基于神经网络算法的工缝机节能电动机控制系统的设计%Design of industrial sewing control system of energy-saving motor based on DSP

    Institute of Scientific and Technical Information of China (English)

    徐展鹏; 孙云云; 刘涵; 郭吉丰

    2011-01-01

    In order to address the problem of low electric efficiency of clutch asynchronous motors used abundantly in the industrial sewing machine control systems, an energy saving motor control system based on the DSP was designed. The industrial sewing machine control system is hysteretic, time-variant and nonlinear, hence the conventional PID control algorithm will reduce the serviceability and reliability of the system because the PID parameters cannot be adjusted timely when the controlled objects are varying. Considering this phenomenon, BP neural algorithm is added to the conventional PID control algorithm, whose self-learning and self-adjusting capabilities help realize the thoughts that parameters of a PID controller can regulate themselves as the system is varying. Furthermore, applying the BP-PID algorithm, Mat Lab simulations of the energy saving motor control system are conducted, and the results of the simulations demonstrate that the control performance of BP-PID is more super than that of conventional PID. Lastly, the BP algorithm is synthesized in the software design, and achieves a satisfactory result.%为解决目前纺织业工缝设备大量运用的离合式异步电动机造成能源利用效率低下的问题,设计了一种基于DSP芯片的节能电动机控制系统.由于工业平缝机是一个滞后、非线性、变参数的控制系统,采用传统的PID控制,因其参数不能随着受控系统的变化进行在线调节,会使控制的有效性与可靠性下降.针对这一缺陷,在传统的PID基础上加入了BP神经网络算法,利用其自学习和自调节能力实现了PID参数随系统变化进行自行调节.利用BP网络PID的原理,对调速系统进行了MatLab仿真,证明了BP网络PID优于传统PID的控制能力.最后将这一结果运用于实际的软件设计中,取得了预期的效果.

  8. 基于国产DSP“魂芯一号”的天气雷达信号处理器设计%Design of a Weather Radar Signal Processor Based on Domestic DSP HunXin-1 Chip

    Institute of Scientific and Technical Information of China (English)

    张阳; 高仲辉

    2014-01-01

    中国电子科技集团公司第三十八研究所研发了首款国产高端数字信号处理芯片“魂芯一号”( BWDSP100),为了打破国外高端芯片的垄断,该国产信号处理器在天气雷达中的应用具有重要意义。在自主开发的软件环境中,通过傅里叶变换法、脉冲对法和批处理方法等3种处理模式实现了天气雷达回波参数估计的处理过程,硬件上利用了“魂芯一号”,它具有4个核并行处理,能高效实时完成3种主要处理模式。论证结果表明,“魂芯一号”在精度和速度上均优于国外高端信号处理器。国产信号处理器应用于天气雷达上将突出其优越的实用价值。%The 38th Research Institute of China Electronics Technology Group Corporation(CETC) has de-veloped the first domestic high-end DSP named HunXin-1 Chip(BWDSP100). In order to break the mo-nopoly of foreign high-end chips,the application of the domestic digital signal processor in weather radars is significant. With fast Fourier transform( FFT) method, Pulse Part Processing( PPP) method and batch method ,the weather radar echo parameters estimation is accomplished based on the self-developed software environment. The HunXin-1 Chip with four cores of parallel processing ability is used in the hardware to complete three main processing modes efficiently. And it is demonstrated that HunXin-1 Chip is better than foreign high-end signal processor in speed and accuracy. Application of domestic signal processor in weath-er radars will highlight its superior practical value.

  9. Software design of integrative twin-wire pulsed MIG welding based on DSP%基于DSP的一体化双丝脉冲MIG焊机软件设计

    Institute of Scientific and Technical Information of China (English)

    陈晓东; 马前进; 姚屏; 陈辉; 薛家祥

    2012-01-01

    双丝焊具有单丝焊无法比拟的优势,焊接效率高,热输入小,能够满足大电流焊接的需要,但其技术复杂,在国内的研究才刚起步.基于DSP芯片TMS320F2808设计了双丝脉冲MIG焊接核心控制系统,实现了双丝的协同工作,采用增量式数字PI算法实现对焊接电流的控制.对双丝电源进行了硬件调试、软件调试和整机联调,调试结果表明电源的静态特性和动态特性良好,满足双丝系统要求.针对8mm厚的45号钢进行了双丝脉冲MIG焊的双丝脉冲不同相位对比实验.在两路脉冲试验参数匹配合适的情况下,进行了若干组试验,焊接效果良好.%Twin-wire welding has much more advantages than single wire welding.Twin-wire is very efficient in welding and has a small heat input which can suit the big current circumstance.But because of its technical complexity,the research is only just beginning in China.the control system of integrative twin-wire plused power supply based on DSP chip TMS320F2808 was established in this article.Using an incremental digital PI algorithm welding current control.The overall power source testing was done on that platform,including the hardware testing and the software debugging.Then the static characteristics and the instant motive characteristics were both tested,which turned out to be a satisfaction of the Tandem system designed.With twin-wire pulsed MIG welding process for 8mm thick 45 steel, a series of comparative experiments is done, Including twin-wire pulse different phase. Finally good performances and beautiful Tandem welding seams came out,at the premise of the right parameters-matching of the two output pulses.

  10. Distributed processing (DP) based e-beam lithography simulation with long range correction algorithm in e-beam machine

    Science.gov (United States)

    Ki, Won-Tai; Choi, Ji-Hyeon; Kim, Byung-Gook; Woo, Sang-Gyun; Cho, Han-Ku

    2008-05-01

    As the design rule with wafer process is getting smaller down below 50nm node, the specification of CDs on a mask is getting more tightened. Therefore, more tight and accurate E-Beam Lithography simulation is highly required in these days. However, in reality most of E-Beam simulation cases, there is a trade-off relationship between the accuracy and the simulation speed. Moreover, the necessity of full chip based simulation has been increasing in order to estimate more accurate mask CDs based on real process condition. Therefore, without consideration of long range correction algorithm such as fogging effect and loading effect correction in E-beam machine, it would be impossible and meaningless to pursue the full chip based simulation. In this paper, we introduce a breakthrough method to overcome the obstacles of E-Beam simulation. In-house E-beam simulator, ELIS (E-beam LIthography Simulator), has been upgraded to solve these problems. First, DP (Distributed Processing) strategy was applied to improve calculation speed. Secondly, the long range correction algorithm of E-beam machine was also applied to compute intensity of exposure on a full chip based (Mask). Finally, ELIS-DP has been evaluated possibility of expecting or analyzing CDs on full chip base.

  11. 基于DSP的直线感应电动机矢量控制%The Vector Control of Linear Induction Motor Based on DSP

    Institute of Scientific and Technical Information of China (English)

    卞林玉; 陈志辉

    2012-01-01

    A mathematical analysis of a doubled-sided, short secondary linear induction motor was made, and an e-quivalent circuit and the establishment of the mathematical model were given out. Because of the dynamic vertical end effect of the linear induction motor, the end effect function was added according to vector control theory of the induction motor. Hie model of the control system based on MATLAB/Simulink was established. And much study about vector control was done to verify the feasibility and correctness of control system model mentioned. The program of the vector control system of linear induction motor based on TMS320F2812 was compiled,and the relevant experiments and analysis were done. Hie location , reciprocating motion and other functions were mainly achieved.%以双边长初级短次级直线感应电动机为研究对象,根据样机的实际结构分析推导了电机的数学模型.直线电机存在由于铁心开断而引起的端部效应,在采用矢量控制策略时,需要对基于旋转感应电动机的矢量控制策略进行修正,建立了基于MATLAB/Simulink的系统模型,进行了直线感应电动机矢量控制的仿真研究,验证了控制方案的可行性与正确性.在理论分析和仿真验证的基础上,设计了基于TMS320F2812的全数字矢量控制系统的控制系统硬件电路,进行了系统实验,实现了电机定位、往返运动等功能.

  12. Real-time realization of scale detection based on comb filters using DSPs; Kushigata filter ni motozuku DSP wo mochiita real time onkai kenshutsu

    Energy Technology Data Exchange (ETDEWEB)

    Saito, T.; Matsui, T. [Toyota National College of Technology, Aichi (Japan); Honda, H.; Tadokoro, Y. [Toyohashi Univ. of Technology (Japan)

    1998-06-30

    Transcription is an operation to collect a music from tones played by a music instrument. It is not easy for a person to collect the music correctly as special knowledge and experience are necessary. Therefore, studies on an automatic transcription by a computer are being conducted now. In this paper, a scale detection method eliminating multiple frequencies by a comb filter is proposed. The characteristics of this system are as follows. It samples corresponding to the music scale, using the differences of sampling points to estimate the music scale. And, owing to use of the comb filter, it is a scale detection method without influences of multiple frequencies composed in the tones played by a music instrument. This paper describes the realization of the comb filter by over sampling and its application onto a harmony detection. Based on this scale detection method, a real time scale detection method using DSPs may be realized and scale detection applicable to real scale of a key board may be possible. 10 refs., 14 figs., 1 tab.

  13. 基于DSP的三轮移动机器人研究%Research on Three-wheeled Mobile Robot Based on DSP

    Institute of Scientific and Technical Information of China (English)

    张梅; 王涛; 高同国

    2011-01-01

    The mobile robot can be a good substitute for human exploration to the dangerous area. It studies a three-wheeled mobile robot with the advantages of good stability and simple structure, shows the detailed analysis of the mechanical structure and the control principle of the robot with TMS320LF2407A, describes the composition of control system and the control strategy of mobile robot. This builds the base for the next research.%针对移动机器人可以很好地代替人类完成对危险地域的探索,从而可以使人类较好地摆脱危险这一需求,研究了一种具有稳定性好、结构简单等优点的三轮移动机器人,详细分析了机器人的运动机构以及采用TMS320LF2407A作为主控器件进行控制的原理,阐述了三轮移动机器人控制系统的组成及控制策略,这些将对进一步深入研究产生积极的影响.

  14. Optimization of MAD module in real-time image processing based on DSP%实时图像处理中基于DSP的MAD模块优化

    Institute of Scientific and Technical Information of China (English)

    杨斯涵

    2012-01-01

    In the high-speed image processing system, in order to solve real-time performance of the MAD algorithm, an optimized MAD algorithm based on TMS320C6416(C6416) is presented. The design uses the technologies like appropriate data storage in SRAM, efficient program flow design and writes ASM program for the loop kernel to reach parallel processing ability of the C6416. It solves the difficulty of time consumption of the MAD. The optimized algorithm can be suitable for the situation that the random changing of template size and search window size. As to the MAD process of 64x64 template and 128×128 search window, it can be proved that the C6416 spares 9 ms only.%针对高速图像处理系统中相关跟踪核心模块最小绝对差累加和算法(MAD)的实时性问题,利用TMS320C6416(C6416)处理器的内部并行结构,提出了基于该处理器的MAD算法设计方案.通过合理的内存数据存储安排、高效的程序流程设计以及人工优化循环核等技术措施,充分发挥了C6416的并行处理能力,解决了MAD模块耗时过长的难题.实验结果证明,算法能适应模板与搜索区域大小可变的情况,对于64×64的模板与128×128的搜索区域计算耗时仅9ms,大大缩短了处理时间.

  15. Design of automatic pattern laser-cutting system based on DSP control%花样激光自动裁剪系统的DSP控制

    Institute of Scientific and Technical Information of China (English)

    蒋水秀; 张森林; 殷建军

    2012-01-01

    To achieve high speed clothing cutting with high control precision, the control system for cutting automatically by laser is developed. Taking advantages of digital signal processor TMS320F2812's rich hardware resources, the system improved laser cutting technology and tangent motion interpolation algorithm. Based on laser cutting principle and general design ideas of auto-cutting system, the mechanical structure with hardware and software is developed for the cutting control system. It involved secure digital card storage and FAT32 file management process, realizing the transmission of files for trajectory control. The results indicated that this automatic laser-cutting system fulfils cutting more exactly and efficiently. Compared with conventional products, it deleted the vibration from mechanical cutter, meanwhile improving the work efficiency and quality for clothing cutting or pattern cutting.%为实现服装面料优质高效裁剪,引入激光裁剪技术,采用具有丰富外设资源的DSP处理器TMS320F2812,运用正切运动插补算法,研发激光自动裁剪控制系统.依据激光裁剪原理和自动裁剪系统的总体设计,完成结构设计和硬件设计,同时配合软件设计,应用SD卡存储及FAT32文件管理程序,实现轨迹控制文件的传输.结果表明:激光自动裁剪系统具有高精度、高效率的裁剪效果.克服了传统机械裁剪刀具切削引起的震动,不但提高了面料或花样裁剪的质量,而且也提高了裁剪效能.

  16. 基于DSP的FMCW雷达泄漏对消系统分析%DSP based Leakage Cancellation Scheme for FMCW Radar

    Institute of Scientific and Technical Information of China (English)

    张鹏; 熊杰

    2015-01-01

    Frequency modulation continuous wave ( FMCW ) radar system with a single antenna transmit and re-ceives signals with the same antenna; therefore high power transmitted signal would leak to receiving channel. Firstly, strong leakage signal will saturated low noise amplifier ( LNA) in front-end of receiver. Secondly, sensi-tivity of the receiver will decrease due to noise of transmitter leaked to the receiver. Finally, strong leakage signal will make the receiver generate false target. To solve this problem, an adaptive RF cancellation system based on digital signal processing is proposed;problems may exist in this system are analyzed. Algorithm simulation to digital part proves the validity of the theoretical analysis.%对于单天线FMCW雷达系统,由于它利用一个天线去发射和接收信号,大功率的发射信号会泄露的接收支路,首先,强泄露信号会使接收机前端的低噪声放大器饱和,其次,发射机噪声泄露的接收机将引起接收机灵敏度下降,最后,强的泄露会造成接收机产生虚假目标。针对这一问题本文提出了一种基于DSP的自适应射频对消系统,并分析了系统中可能存在的问题,最后进行了系统中数字部分的算法仿真证明了理论分析的正确性。

  17. Design of Photovoltaic Grid-connected Inverter Based on DSP%基于DSP的光伏并网逆变器的设计

    Institute of Scientific and Technical Information of China (English)

    蒲鹏鹏; 刘广思

    2009-01-01

    Grid-connected photovoltaic (PV) system is the development trend of photovoltaic systems. According to the grid-connected PV system characteristics, this paper presents the design of a photovoltaic grid-connected inverter based on the digital signal processor TMS320F2407. The paper analyzes the constitute and control principle of the system and designs the software flow chart of MPPT(Maximum Power Point Tracking) algorithm and the phase lock loop, The experimental results show the grid-connected current wave achieves our need. The wave of grid-connected current has the same frequency and phase as the utility voltage. The power factor of grid-connected has reached to nearly 1.%光伏并网发电系统是光伏系统发展的趋势,文章根据光伏并网发电系统的特点,设计了一套基于数字信号处理器TMS320F2407控制的单相光伏并网逆变器.分析了系统的结构和控制原理,设计了最大功率点跟踪算法和锁相环的软件设计流程图.实验结果表明并网电流波形良好,逆变器输出的电流基本与电网电压同频同相,并网的功率因数近似为1.

  18. Polarization tailored novel vector beams based on conical refraction

    CERN Document Server

    Turpin, A; Peinado, A; Lizana, A; Campos, J; Kalkandjiev, T K; Mompart, J

    2014-01-01

    Coherent vector beams with involved states of polarization (SOP) are widespread in the literature, having applications in laser processing, super-resolution imaging and particle trapping. We report novel vector beams obtained by transforming a Gaussian beam passing through a biaxial crystal, by means of the conical refraction phenomenon. We analyze both experimentally and theoretically the SOP of the different vector beams generated and demonstrate that the SOP of the input beam can be used to control both the shape and the SOP of the transformed beam. We also identify polarization singularities of such beams for the first time and demonstrate their control by the SOP of an input beam.

  19. A power beaming based infrastructure for space power

    Energy Technology Data Exchange (ETDEWEB)

    Bamberger, J.A.

    1991-08-01

    At present all space mission power requirements are met by integral, on-board, self-contained power systems. To provide needed flexibility for space exploration and colonization, an additional approach to on-board, self-contained power systems is needed. Power beaming, an alternative approach to providing power, has the potential to provide increased mission flexibility while reducing total mass launched into space. Laser-power beaming technology provides a viable power and communication infrastructure that can be developed sequentially as it is applied to power satellite constellations in Earth orbit and to orbital transport vehicles transferring satellites and cargos to geosynchronous orbit and beyond. Coupled with nuclear electric propulsion systems for cargo transport, the technology can be used to provide global power to the Lunar surface and to Mars' surface and moons. The technology can be developed sequentially as advances in power system and propulsion system technology occur. This paper presents stepwise development of an infrastructure based on power beaming that can support the space development and exploration goals of the Space Exploration Initiative. Power scenarios based on commonality of power systems hardware with cargo transport vehicles are described. Advantages of this infrastructure are described. 12 refs., 4 figs., 1 tab.

  20. Beam based alignment of the SSRF storage ring

    Institute of Scientific and Technical Information of China (English)

    ZHANG Man-Zhou; LI Hao-Hu; JIANG Bo-Cheng; LIU Gui-Min; LI De-Ming

    2009-01-01

    There are 140 beam position monitors (BPMs) in the Shanghai Synchrotron Radiation Facility (SSRF) storage ring used for measuring the closed orbit. As the BPM pickup electrodes are assembled directly on the vacuum chamber, it is important to calibrate the electrical center offset of the BPM to an adjacent quadrupole magnetic center. A beam based alignment (BBA) method which varies individual quadrupole magnet strength and observes its effects on the orbit is used to measure the BPM offsets in both the horizontal and vertical planes. It is a completely automated technique with various data processing methods. There are several parameters such as the strength change of the correctors and the quadrupoles which should be chosen carefully in real measurement. After several rounds of BBA measurement and closed orbit correction, these offsets are set to an accuracy better than 10 μm. In this paper we present the method of beam based calibration of BPMs, the experimental results of the SSRF storage ring, and the error analysis.

  1. An infrared light polarized beam splitter based on graphene array

    Science.gov (United States)

    Chen, Dingbo; Yang, Junbo; Zhang, Jingjing; Wu, Wenjun; Huang, Jie; Zhang, Feifei; Wang, Hongqing

    2016-10-01

    Metamaterials have attracted a lot of attention in the past decade, because of its remarkable properties in electronics and photonics. Recently, a new kind of two-dimensional metamaterial named metasurface have led the research front. Metasurfaces show up excellent optical properties by patterning planar nanostructures. Novel optical phenomena based on graphene include ultra-thin focusing, anomalous reflection or refraction strong spin-orbit and so on. In this work, we have designed a novel infrared light polarized beam splitter by combining the 2D array of graphene with a subwavelength-thickness optical cavity, which demonstrated great splitting effect in infrared wavelength. Our demonstration pave a novel way for the infrared light polarized beam splitting.

  2. Petri net and beam search based FMS scheduling system

    Energy Technology Data Exchange (ETDEWEB)

    Shih, H.; Sekiguchi, T. (Yokohama National University, Yokohama (Japan))

    1992-04-15

    The present paper proposes an on-line flexible manufacturing system (FMS) scheduling system which takes in consideration the routing flexibility. The FMS was modeled by utilizing a timed Petri net representation. This representation gives real time information about the production evolvement and the situation of each machine and equipment. According to this information, the present system starts to search for the scheduling of the next orders to be assigned. The search is conducted by a beam search based on-line decision method. An algorithm has been developed by integrating the timed Petri net representation to the beam search. In order to test the developed system, a just-in-time production objective was established. The performance of this system was evaluated by exhaustive simulations. Consequently, a better achievement of the production objective as well as a smaller variance under different scheduling conditions can be realized. 14 refs., 6 figs., 2 tabs.

  3. Multiwave velocity analysis based on Gaussian beam prestack depth migration

    Institute of Scientific and Technical Information of China (English)

    Han Jian-Guang; Wang Yun; Han Ning; Xing Zhan-Tao; Lu Jun

    2014-01-01

    Prestack depth migration of multicomponent seismic data improves the imaging accuracy of subsurface complex geological structures. An accurate velocityfi eld is critical to accurate imaging. Gaussian beam migration was used to perform multicomponent migration velocity analysis of PP- and PS-waves. First, PP- and PS-wave Gaussian beam prestack depth migration algorithms that operate on common-offset gathers are presented to extract offset-domain common-image gathers of PP- and PS-waves. Second, based on the residual moveout equation, the migration velocity fields of P- and S-waves are updated. Depth matching is used to ensure that the depth of the target layers in the PP- and PS-wave migration profi les are consistent, and high-precision P- and S-wave velocities are obtained. Finally, synthetic andfi eld seismic data suggest that the method can be used effectively in multiwave migration velocity analysis.

  4. Architecture Design of a Variable Length Instruction Set VLIW DSP

    Institute of Scientific and Technical Information of China (English)

    SHEN Zheng; HE Hu; YANG Xu; JIA Di; SUN Yihe

    2009-01-01

    The cost of the central register file and the size of the program code limit the scalability of very long instruction word (VLIW) processors with increasing numbers of functional units. This paper presents the architectural design of a six-way VLIW digital signal processor (DSP) with clustered register files. The archi-tecture uses a variable length instruction set and supports dynamic instruction dispatching. The one-level memory system architecture of the processor includes 16-KB instruction and data caches and 16-KB in-struction and data on-chip RAM. A compiler based on the Open64 was developed for the system. Evalua-tions show that the processor is suitable for high performance applications with a high code density and small program code size.

  5. Implementation of aeronautic image compression technology on DSP

    Science.gov (United States)

    Wang, Yujing; Gao, Xueqiang; Wang, Mei

    2007-11-01

    According to the designed characteristics and demands of aeronautic image compression system, lifting scheme wavelet and SPIHT algorithm was selected as the key part of software implementation, which was introduced with details. In order to improve execution efficiency, border processing was simplified reasonably and SPIHT (Set Partitioning in Hierarchical Trees) algorithm was also modified partly. The results showed that the selected scheme has a 0.4dB improvement in PSNR(peak-peak-ratio) compared with classical Shaprio's scheme. To improve the operating speed, the hardware system was then designed based on DSP and many optimization measures were then applied successfully. Practical test showed that the system can meet the real-time demand with good quality of reconstruct image, which has been used in an aeronautic image compression system practically.

  6. The LEIR LLRF DSP-Carrier Board : Performance, CPS Renovation Plan and Recommendations

    CERN Document Server

    Angoletta, M E

    2007-01-01

    The LEIR LLRF project started in late 2003 and included designing,manufacturing and commissioning a novel, all-digital beam control system. The project was first to provide the LEIR machine with a beam control system satisfying the many performance requirements. This was achieved in 2006 with the successful LEIR LLRF system commissioning. In addition, the project was to act as a pilot to export the same technology to the other machines of the PS Complex (CPS), such as PS, PSB and AD. New machines currently being proposed (e.g. ELENA) will also rely on it. The evaluation of the LEIR experience and the recommendations on how to best pursue this migration strategy are therefore integral parts of the LEIR LLRF project. A fundamental building block of the LEIR LLRF system is the DSP-carrier board where all beam control loops are implemented. This note examines the main features of the DSP-carrier board release 1.0 used in LEIR and evaluates their impact on the LEIR LLRF implementation and operational performance. ...

  7. The Chameleon Architecture for Streaming DSP Applications

    Directory of Open Access Journals (Sweden)

    André B. J. Kokkeler

    2007-02-01

    Full Text Available We focus on architectures for streaming DSP applications such as wireless baseband processing and image processing. We aim at a single generic architecture that is capable of dealing with different DSP applications. This architecture has to be energy efficient and fault tolerant. We introduce a heterogeneous tiled architecture and present the details of a domain-specific reconfigurable tile processor called Montium. This reconfigurable processor has a small footprint (1.8 mm2 in a 130 nm process, is power efficient and exploits the locality of reference principle. Reconfiguring the device is very fast, for example, loading the coefficients for a 200 tap FIR filter is done within 80 clock cycles. The tiles on the tiled architecture are connected to a Network-on-Chip (NoC via a network interface (NI. Two NoCs have been developed: a packet-switched and a circuit-switched version. Both provide two types of services: guaranteed throughput (GT and best effort (BE. For both NoCs estimates of power consumption are presented. The NI synchronizes data transfers, configures and starts/stops the tile processor. For dynamically mapping applications onto the tiled architecture, we introduce a run-time mapping tool.

  8. The Chameleon Architecture for Streaming DSP Applications

    Directory of Open Access Journals (Sweden)

    Heysters PaulM

    2007-01-01

    Full Text Available We focus on architectures for streaming DSP applications such as wireless baseband processing and image processing. We aim at a single generic architecture that is capable of dealing with different DSP applications. This architecture has to be energy efficient and fault tolerant. We introduce a heterogeneous tiled architecture and present the details of a domain-specific reconfigurable tile processor called Montium. This reconfigurable processor has a small footprint (1.8 mm2 in a 130 nm process, is power efficient and exploits the locality of reference principle. Reconfiguring the device is very fast, for example, loading the coefficients for a 200 tap FIR filter is done within 80 clock cycles. The tiles on the tiled architecture are connected to a Network-on-Chip (NoC via a network interface (NI. Two NoCs have been developed: a packet-switched and a circuit-switched version. Both provide two types of services: guaranteed throughput (GT and best effort (BE. For both NoCs estimates of power consumption are presented. The NI synchronizes data transfers, configures and starts/stops the tile processor. For dynamically mapping applications onto the tiled architecture, we introduce a run-time mapping tool.

  9. Comparing Ray-Based and Wave-Based Models of Cross-Beam Energy Transfer

    Science.gov (United States)

    Follett, R. K.; Edgell, D. H.; Shaw, J. G.; Froula, D. H.; Myatt, J. F.

    2016-10-01

    Ray-based models of cross-beam energy transfer (CBET) are used in radiation-hydrodynamics codes to calculate laser-energy deposition. The accuracy of ray-based CBET models is limited by assumptions about the polarization and phase of the interacting laser beams and by the use of a paraxial Wentzel-Kramers-Brillouin (WKB) approximation. A 3-D wave-based solver (LPSE-CBET) is used to study the nonlinear interaction between overlapping laser beams in underdense plasma. A ray-based CBET model is compared to the wave-based model and shows good agreement in simple geometries where the assumptions of the ray-based model are satisfied. Near caustic surfaces, the assumptions of the ray-based model break down and the calculated energy transfer deviates from wave-based calculations. This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0001944.

  10. Free vibration of functionally graded beams based on both classical and first-order shear deformation beam theories

    Institute of Scientific and Technical Information of China (English)

    李世荣; 万泽青; 张静华

    2014-01-01

    The free vibration of functionally graded material (FGM) beams is studied based on both the classical and the first-order shear deformation beam theories. The equations of motion for the FGM beams are derived by considering the shear deforma-tion and the axial, transversal, rotational, and axial-rotational coupling inertia forces on the assumption that the material properties vary arbitrarily in the thickness direction. By using the numerical shooting method to solve the eigenvalue problem of the coupled ordinary differential equations with different boundary conditions, the natural frequen-cies of the FGM Timoshenko beams are obtained numerically. In a special case of the classical beam theory, a proportional transformation between the natural frequencies of the FGM and the reference homogenous beams is obtained by using the mathematical similarity between the mathematical formulations. This formula provides a simple and useful approach to evaluate the natural frequencies of the FGM beams without dealing with the tension-bending coupling problem. Approximately, this analogous transition can also be extended to predict the frequencies of the FGM Timoshenko beams. The numerical results obtained by the shooting method and those obtained by the analogous transformation are presented to show the effects of the material gradient, the slenderness ratio, and the boundary conditions on the natural frequencies in detail.

  11. The generation of arbitrary vector beams using a division of a wavefront-based setup

    Science.gov (United States)

    Kalita, Ranjan; Gaffar, Md; Boruah, Bosanta R.

    2016-07-01

    In this paper, we introduce an arbitrary vector-beam-forming scheme using a simple arrangement involving only one liquid crystal spatial light modulator. An arbitrary vector beam can be obtained by overlapping two orthogonally polarized beams. In most of the existing vector-beam-forming schemes the two orthogonally polarized beams are essentially copies of a single incident wavefront. However, in the proposed scheme the two orthogonally polarized beams correspond to two separated parts of a single incident wavefront. Taking a cue from the two-beam interference phenomenon, the present scheme can be referred to as a division of a wavefront-based scheme. The proposed setup offers certain important advantages and is more suitable for the generation of higher average-power vector beams. We demonstrate the working of the vector-beam-forming scheme by generating various vector beams such as radially polarized, azimuthally polarized, and Bessel-Gauss beams and also a boat-shaped beam in the focal volume of a low-numerical-aperture focusing lens. The boat-shaped beam comprises a dark center surrounded by intense light from all but one direction. The beam is realized at the focus of an azimuthally polarized beam in the presence of a moderate amount of coma in the beam. The experimental results obtained using the proposed setup are verified by comparing them with the theoretical results.

  12. DSP控制的电力线通信模拟前端接口设计%Analog Front-end Interface Design of Power Line Communication Based on DSP Control

    Institute of Scientific and Technical Information of China (English)

    陈建明

    2008-01-01

    DSP(Digital Signal Processor)为各种电子系统提供了许多片内外设以及计算能力,设计人员可以实现许多功能,例如电力载波通信、功率因数校正、变频控制等.笔者设计了一个遵从CEA-709协议的、DSP控制的电力线通信模拟前端接口.

  13. The Research of a novel Method for Brushless Motor Controller based on DSP%基于DSP的新颖无刷直流电机控制器设计

    Institute of Scientific and Technical Information of China (English)

    赵长青; 范蟠果

    2008-01-01

    利用DSP2812设计了一个无位置传感器电机控制系统,该系统利用三相四开关电路对无刷直流电机(Brushless DC Motor,简称BLDCM)进行驱动,采用了新颖的无位置传感器控制方法和脉宽调制(PWM)方法.最后通过分析和试验证明了该系统的可行性.

  14. Active Noise Control System in the Cabin of Helicopter Based on DSP%基于DSP的直升机舱室内的有源噪声控制系统

    Institute of Scientific and Technical Information of China (English)

    李铁; 严胜刚; 刘道旭

    2009-01-01

    为消减直升机舱室噪声,对有源消声技术进行了研究.以自适应有源噪声控制系统为研究核心,选用DSP21160作为控制器,给出了系统的硬件解决方案,并利用汇编语言在硬件系统上实现了基于FxLMS算法的有源噪声实时控制.实验结果表明,系统取得了良好的降噪效果

  15. Achieving of PWM machine tool electric drive system based on FPGA and DSP technique%基于FPGA和DSP技术的PWM机床电力拖动系统的实现

    Institute of Scientific and Technical Information of China (English)

    徐进

    2004-01-01

    本文综合了FPGA(Field Programmable Gate Array现场可编程门阵列)和DSP(Digital Signal Processing)的技术.提出了一种高性能的智能控制信号去控制PWM(Pulse Width Modulation)的新方法,使机床调速范围宽、机械特性硬、动态性能好,为我国的机床加工提供一种新的有效方法.

  16. Research on electrical control system for prosthetic hand based on DSP%基于DSP的多自由度假手电气控制系统的研究

    Institute of Scientific and Technical Information of China (English)

    赵位桦; 姜力; 赵大威

    2008-01-01

    阐述了基于数字信号处理器(DSP)和步进电机的新型仿人型假手的电气控制系统.介绍了假手电气系统构成及其原理,该系统具有结构简单、集成度高的优点.给出了控制系统的硬件实现和软件程序的设计,并通过实验验证了假手的抓取性能.

  17. Beam Pattern Synthesis Based on Hybrid Optimization Algorithm

    Institute of Scientific and Technical Information of China (English)

    YU Yan-li; WANG Ying-min; LI Lei

    2010-01-01

    As conventional methods for beam pattern synthesis can not always obtain the desired optimum pattern for the arbitrary underwater acoustic sensor arrays, a hybrid numerical synthesis method based on adaptive principle and genetic algorithm was presented in this paper. First, based on the adaptive theory, a given array was supposed as an adaptive array and its sidelobes were reduced by assigning a number of interference signals in the sidelobe region. An initial beam pattern was obtained after several iterations and adjustments of the interference intensity, and based on its parameters, a desired pattern was created. Then, an objective function based on the difference between the designed and desired patterns can be constructed. The pattern can be optimized by using the genetic algorithm to minimize the objective function. A design example for a double-circular array demonstrates the effectiveness of this method. Compared with the approaches existing before, the proposed method can reduce the sidelobe effectively and achieve less synthesis magnitude error in the mainlobe.The method can search for optimum attainable pattern for the specific elements if the desired pattern can not be found.

  18. Memory conserving speech synthesis DSP chip; Sho memory onsei gosei DSP chip

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    which can be incorporated into a system having large restriction in terms of hardware. The system was incorporated successfully into a digital signal processor (DSP) chip for an answering phone. Reduction in speech elements, compression of an element dictionary, and simplification of synthesis processing have made the speech synthesizing part including the element dictionary as very compact as about 40 K bytes. The speech call-out function automatically gives accents on names registered in an address book with Katakana characters, converts them into synthesized sound and reads them out. The DSP chip is mounted on answering phone sets with number display, and has been put on sale since August 1998. (translated by NEDO)

  19. Tunable polarization beam splitter based on optofluidic ring resonator.

    Science.gov (United States)

    Zhu, Song; Liu, Yang; Shi, Lei; Xu, Xinbiao; Yuan, Shixing; Liu, Ningyu; Zhang, Xinliang

    2016-07-25

    An efficient polarization beam splitter (PBS) based on an optofluidic ring resonator (OFRR) is proposed and experimentally demonstrated. The PBS relies on the large effective refractive index difference between transverse-electric (TE) and transverse-magnetic (TM) polarization states, since the silica-microcapillary-based OFRR possesses a slab-like geometry configuration in the cross section through which the circulating light travels. To the best of our knowledge, this is the first OFRR-based PBS. In our work, the maximum polarization splitting ratio of up to 30 dB is achieved. Besides, water and ethanol are pumped into the core of the silica microcapillary respectively, and the maximum wavelength tuning range of 7.02 nm is realized when ethanol flows through the core, verifing the tuning principle of the PBS effectively. With such a good performance and simple scheme, this OFRR-based PBS is promising for applications such as tunable optical filters, demultiplexers, and routers.

  20. A laser beam quality definition based on induced temperature rise.

    Science.gov (United States)

    Miller, Harold C

    2012-12-17

    Laser beam quality metrics like M(2) can be used to describe the spot sizes and propagation behavior of a wide variety of non-ideal laser beams. However, for beams that have been diffracted by limiting apertures in the near-field, or those with unusual near-field profiles, the conventional metrics can lead to an inconsistent or incomplete description of far-field performance. This paper motivates an alternative laser beam quality definition that can be used with any beam. The approach uses a consideration of the intrinsic ability of a laser beam profile to heat a material. Comparisons are made with conventional beam quality metrics. An analysis on an asymmetric Gaussian beam is used to establish a connection with the invariant beam propagation ratio.

  1. Application of DSP in Motor Control System%DSP在电机控制系统中的应用

    Institute of Scientific and Technical Information of China (English)

    周崐; 黄友桥; 曹晨

    2011-01-01

    Taking brushless DC motor and TMS320LF2407 for example,this paper introduces the application of DSP in motor control system.It gives software and hardware design of brushless DC motor control system based on DSP%本文以无刷直流电机和TMS320LF2407为例,介绍了DSP在电机控制系统中的应用,给出了基于DSP的无刷直流电机控制系统的软硬件设计。

  2. Design of eject force testing system for vehicle-mounted cigarette lighter based on DSP%基于DSP的车载点烟器弹出力测量系统设计

    Institute of Scientific and Technical Information of China (English)

    姜义成; 史正洋; 刘正平

    2014-01-01

    点烟器目前已经成为汽车的必备品,其机械性能对于驾乘安全与用户体验至关重要。针对汽车厂商实际需求,设计一套专业、高效的车载点烟器弹出力测量系统,从而对其机械性能进行有效检验与评估。本系统从功能实现角度可理解为一个基于嵌入式系统的集数据采集、数据分析等功能于一体的电子系统。系统以 TI公司专用于控制、测量领域的TMS320F2812系列 DSP芯片为核心处理器设计采集系统,利用Visual Basic 6.0开发环境设计上位机用户操作平台。结合系统所要实现功能给出完整的解决方案,详细介绍了硬件电路的工作原理及系统固件和用户端软件的设计实现。系统最终进行了工业级实测,实现了对点烟器弹出力多周期高精度的测量,利用上位机软件可以对测量结果进行显示、分析与存储。%Cigarette lighter has become an essential product for vehicles,whose mechanical performance is significant in driving safety and user′s experience. A system for measuring the pop-up force of vehicle-mounted cigarette lighter was designed to meet the actual demand of car manufacturers,which is professional and efficient in assessing and inspecting the mechanical properties of their products. The system can be abstracted as an embedded CPU-based small integrated electronic system including data acquisition,analysis and other functions. In the system,the DSP chip in TMS320F2812 series of Texas Instruments,which dedicates in the control area,is taken as the core processor of the system to design the acquisition system,and users’operating platform on PC is designed with Visual Basic 6.0 development environment. A complete solution based on the system request is given in this paper. The working principles of the hardware circuit are described in detail. The firmware and user interface were designed. The system has been used in the factory ultimately,and the high

  3. 基于DSP的离网型永磁同步发电机电压调节器%Design of voltage requlator in off-grid permanent magnet synchronous generator based on DSP

    Institute of Scientific and Technical Information of China (English)

    杨刚; 张家冰

    2014-01-01

    针对目前离网型永磁同步发电机输出电压不稳定及难以调节的问题,先将输出电压整流成直流电压,再将直流电压逆变为交流电压输出。逆变电路采用 SPWM 算法,并以 DSP 作为控制核心。经过整流、逆变后,发电机的输出电压稳定,并且能对输出电压方便地进行调节。%As to the problem of off-grid permanent magnet synchronous generator out put voltage was not stable and difficult to adjust , this paper transformed the output voltage into a DC voltage , then the DC voltage was transformed into AC voltage . The algo-rithm of SPWM with DSP as the controller was used in inverter circuit . Though rectifiers and inverters , the generator output voltage can be stable and conveniently regulated the output voltage .

  4. Robust motion estimation on a low-power multi-core DSP

    Science.gov (United States)

    Igual, Francisco D.; Botella, Guillermo; García, Carlos; Prieto, Manuel; Tirado, Francisco

    2013-12-01

    This paper addresses the efficient implementation of a robust gradient-based optical flow model in a low-power platform based on a multi-core digital signal processor (DSP). The aim of this work was to carry out a feasibility study on the use of these devices in autonomous systems such as robot navigation, biomedical assistance, or tracking, with not only power restrictions but also real-time requirements. We consider the C6678 DSP from Texas Instruments (Dallas, TX, USA) as the target platform of our implementation. The interest of this research is particularly relevant in optical flow scope because this system can be considered as an alternative solution for mid-range video resolutions when a combination of in-processor parallelism with optimizations such as efficient memory-hierarchy exploitation and multi-processor parallelization are applied.

  5. Measurement and Analysis Harmonics Using DSP

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Sang Ik; Yoo, Jae Geun; Jeon, Jonog Chay [Korea Electrical Safety Corporation (Korea)

    2002-07-01

    Limitation countermeasure on harmonics occurred by power conversion installation. motor speed control equipment, and so on of power system is very important problem, and first of all, accuracy harmonics analysis in system is required for appropriate limitation counterplan. Analysis and judgement on power system harmonic by measurement are needed because analysis by mathematical model generally used for these harmonic analysis, if nonlinear ingredient is included in system, is not relatively correct. So, in this paper, system to measure and analyze harmonic by installing it in a power system, using DSP(Digital Signal Processor), is designed and developed, Also, it's performance is verified by installing it in the system that harmonics occurred. (author). 5 refs., 10 figs.

  6. CAS - Great success for the DSP course

    CERN Multimedia

    2007-01-01

    The CERN Accelerator School (CAS) and the Uppsala University jointly organized a specialized school on "Digital Signal Processing" in Sigtuna, Sweden from 1-9 June, 2007. This course was a "première" in many ways: firstly the topic had never been addressed by CAS, and secondly the structure of the course differed from the usual specialized courses in the sense that it was composed of 32 hours of theoretical lectures in the mornings and 16 hours "hands-on" courses in the afternoons. The latter, which have been designed by CERN experts, had some logistic implications in transporting computers and circuit boards (DSP and FPGA) to Sweden. The principle of this new approach was extremely well received by the accelerator community and 97 participants representing 23 different nationalities (80% of the participants originating from the CERN Member States) attended the course. As illustrated by the very positive feedback received from th...

  7. Expression profiling of a diapause-specific peptide (DSP) of the leaf beetle Gastrophysa atrocyanea and silencing of DSP by double-strand RNA.

    Science.gov (United States)

    Tanaka, Hiromasa; Suzuki, Koichi

    2005-06-01

    A diapause-specific peptide (DSP) composed of 41 amino acid residues including 6 cysteines, has been isolated from diapausing adults of the leaf beetle Gastrophysa atrocyanea. In this study, DSP was found to be expressed primarily in diapausing adults and to a minor extent in pupae, but not in eggs, larvae, or post-diapausing adults. DSP was not induced by bacterial or fungal challenge. DSP-less adults were generated by the injection of double-stranded RNA (dsRNA) corresponding to the dsp gene into pre-diapausing adults. Gene silencing induced by dsRNA was found to be a useful tool for the analysis of DSP in diapausing adults. DSP-less adults showed similar burrowing behavior and oxygen consumption as control insects suggesting that DSP is not essential for the normal onset and maintenance of diapause.

  8. Microwave Chip-Based Beam Splitter for Low-Energy Guided Electrons.

    Science.gov (United States)

    Hammer, Jakob; Thomas, Sebastian; Weber, Philipp; Hommelhoff, Peter

    2015-06-26

    We present a novel beam splitter for low-energy electrons using a micro-structured guiding potential created above the surface of a planar microwave chip. Beam splitting arises from smoothly transforming the transverse guiding potential for an electron beam from a single-well harmonic confinement into a double well, thereby generating two separated output beams with 5 mm lateral spacing. Efficient beam splitting is observed for electron kinetic energies up to 3 eV, in excellent agreement with particle tracking simulations. We discuss prospects of this novel beam splitter approach for electron-based quantum matter-wave optics experiments.

  9. Dual-beam laser autofocusing system based on liquid lens

    Science.gov (United States)

    Zhang, Fumin; Yao, Yannan; Qu, Xinghua; Zhang, Tong; Pei, Bing

    2017-02-01

    A dual-beam laser autofocusing system is designed in this paper. The autofocusing system is based on a liquid lens with less moving parts and fast response time, which makes the system simple, reliable, compact and fast. A novel scheme "Time-sharing focus, fast conversion" is innovatively proposed. The scheme effectively solves the problem that the guiding laser and the working laser cannot focus at the same target point because of the existence of chromatic aberration. This scheme not only makes both guiding laser and working laser achieve optimal focusing in guiding stage and working stage respectively, but also greatly reduces the system complexity and simplifies the focusing process as well as makes autofocusing time of the working laser reduce to about 10 ms. In the distance range of 1 m to 30 m, the autofocusing spot size is kept under 4.3 mm at 30 m and just 0.18 mm at 1 m. The spot size is much less influenced by the target distance compared with the collimated laser with a micro divergence angle for its self-adaptivity. The dual-beam laser autofocusing system based on liquid lens is fully automatic, compact and efficient. It is fully meet the need of dynamicity and adaptivity and it will play an important role in a number of long-range control applications.

  10. A multi-DSP system for the neutron high resolution Fourier diffractometer

    Energy Technology Data Exchange (ETDEWEB)

    Drozdov, V.A.; Butenko, V.A.; Prikhodko, V.I. [Joint Inst. of Nuclear Research, Moscow (Russian Federation). Frank Lab. of Neutron Physics

    1998-08-01

    The multi-DSP data acquisition system for neutron time-of-flight spectrum measurements requiring fast real-time data processing is designed and is operated at the neutron High Resolution Fourier Diffractometer (HRFD). The use of high performance DSPs and front-end electronics based on flexible PLDs allows increasing of the efficiency of neutron diffractometers with a Fourier chopper and a multi-element detector system by the method of electronic time-focusing.

  11. New multi-DSP parallel computing architecture for real-time image processing

    Institute of Scientific and Technical Information of China (English)

    Hu Junhong; Zhang Tianxu; Jiang Haoyang

    2006-01-01

    The flexibility of traditional image processing system is limited because those system are designed for specific applications. In this paper, a new TMS320C64x-based multi-DSP parallel computing architecture is presented. It has many promising characteristics such as powerful computing capability, broad I/O bandwidth, topology flexibility, and expansibility. The parallel system performance is evaluated by practical experiment.

  12. Optimization of solenoid based low energy beam transport line for high current H+ beams

    Science.gov (United States)

    Pande, R.; Singh, P.; Rao, S. V. L. S.; Roy, S.; Krishnagopal, S.

    2015-02-01

    A 20 MeV, 30 mA CW proton linac is being developed at BARC, Mumbai. This linac will consist of an ECR ion source followed by a Radio Frequency Quadrupole (RFQ) and Drift tube Linac (DTL). The low energy beam transport (LEBT) line is used to match the beam from the ion source to the RFQ with minimum beam loss and increase in emittance. The LEBT is also used to eliminate the unwanted ions like H2+ and H3+ from entering the RFQ. In addition, space charge compensation is required for transportation of such high beam currents. All this requires careful design and optimization. Detailed beam dynamics simulations have been done to optimize the design of the LEBT using the Particle-in-cell code TRACEWIN. We find that with careful optimization it is possible to transport a 30 mA CW proton beam through the LEBT with 100% transmission and minimal emittance blow up, while at the same time suppressing unwanted species H2+ and H3+ to less than 3.3% of the total beam current.

  13. Design of miniature hybrid target recognition system with combination of FPGA+DSP

    Science.gov (United States)

    Luo, Shishang; Li, Xiujian; Jia, Hui; Hu, Wenhua; Nie, Yongming; Chang, Shengli

    2010-10-01

    With advantages of flexibility, high bandwidth, high spatial resolution and high-speed parallel operation, the opto-electronic hybrid target recognition system can be applied in many civil and military areas, such as video surveillance, intelligent navigation and robot vision. A miniature opto-electronic hybrid target recognition system based on FPGA+DSP is designed, which only employs single Fourier lens and with a focal length. With the precise timing control of the FPGA and images pretreatment of the DSP, the system performs both Fourier transform and inverse Fourier transform with all optical process, which can improve recognition speed and reduce the system volume remarkably. We analyzed the system performance, and a method to achieve scale invariant pattern recognition was proposed on the basis of lots of experiments.

  14. Beam based alignment and its relevance in Indus-2

    Energy Technology Data Exchange (ETDEWEB)

    Jena, Saroj Kumar; Husain, Riyasat; Gandhi, M. L.; Agrawal, R. K.; Yadav, S.; Ghodke, A. D. [Raja Ramanna Centre for Advanced Technology, Indore (India)

    2015-09-15

    Initially in the Indus-2 storage ring, the closed orbit distortion (COD) could be best corrected to 1.3 mm rms in the horizontal and 0.43 mm rms in the vertical plane. The strength of the corrector magnets required high values for COD correction. This revealed that offsets in COD readout by the beam position monitors (BPMs) played a role in not achieving a rms COD lower than the above value. Thus, the offset between the electrical center of BPMs and the magnetic center of the nearest quadrupole magnet could be estimated using the beam based alignment (BBA) method. It prefers that the quadrupole magnet is able to be controlled individually and active shunt power supply (ASPS) system was designed for this purpose that works efficiently. This paper describes the methodology of BBA, topology of ASPS and its performance, and COD minimization using the measured BPM offsets. After BBA, the COD could be reduced to 0.45 mm rms and 0.2 mm rms in horizontal and vertical planes, respectively.

  15. First platinum moderated positron beam based on neutron capture

    CERN Document Server

    Hugenschmidt, C; Repper, R; Schreckenbach, K; Sperr, P; Triftshaeuser, W

    2002-01-01

    A positron beam based on absorption of high energy prompt gamma-rays from thermal neutron capture in sup 1 sup 1 sup 3 Cd was installed at a neutron guide of the high flux reactor at the ILL in Grenoble. Measurements were performed for various source geometries, dependent on converter mass, moderator surface and extraction voltages. The results lead to an optimised design of the in-pile positron source which will be implemented at the Munich research reactor FRM-II. The positron source consists of platinum foils acting as gamma-e sup + e sup - -converter and positron moderator. Due to the negative positron work function moderation in heated platinum leads to emission of monoenergetic positrons. The positron work function of polycrystalline platinum was determined to 1.95(5) eV. After acceleration to several keV by four electrical lenses the beam was magnetically guided in a solenoid field of 7.5 mT leading to a NaI-detector in order to detect the 511 keV gamma-radiation of the annihilating positrons. The posi...

  16. Beam Diagnostics for Laser Undulator Based on Compton Backward Scattering

    CERN Document Server

    Kuroda, R

    2005-01-01

    A compact soft X-ray source is required in various research fields such as material and biological science. The laser undulator based on Compton backward scattering has been developed as a compact soft X-ray source for the biological observation at Waseda University. It is performed in a water window region (250eV - 500 eV) using the interaction between 1047 nm Nd:YLF laser (10ps FWHM) and about 5 MeV high quality electron beam (10ps FWHM) generated from rf gun system. The range of X-ray energy in the water window region has K-shell absorption edges of Oxygen, Carbon and Nitrogen, which mainly constitute of living body. Since the absorption coefficient of water is much smaller than the protein's coefficient in this range, a dehydration of the specimens is not necessary. To generate the soft X-ray pulse stably, the electron beam diagnostics have been developed such as the emittance measurement using double slit scan technique, the bunch length measurement using two frequency analysis technique. In this confere...

  17. Dominant de novo DSP mutations cause erythrokeratodermia-cardiomyopathy syndrome.

    Science.gov (United States)

    Boyden, Lynn M; Kam, Chen Y; Hernández-Martín, Angela; Zhou, Jing; Craiglow, Brittany G; Sidbury, Robert; Mathes, Erin F; Maguiness, Sheilagh M; Crumrine, Debra A; Williams, Mary L; Hu, Ronghua; Lifton, Richard P; Elias, Peter M; Green, Kathleen J; Choate, Keith A

    2016-01-15

    Disorders of keratinization (DOK) show marked genotypic and phenotypic heterogeneity. In most cases, disease is primarily cutaneous, and further clinical evaluation is therefore rarely pursued. We have identified subjects with a novel DOK featuring erythrokeratodermia and initially-asymptomatic, progressive, potentially fatal cardiomyopathy, a finding not previously associated with erythrokeratodermia. We show that de novo missense mutations clustered tightly within a single spectrin repeat of DSP cause this novel cardio-cutaneous disorder, which we term erythrokeratodermia-cardiomyopathy (EKC) syndrome. We demonstrate that DSP mutations in our EKC syndrome subjects affect localization of desmosomal proteins and connexin 43 in the skin, and result in desmosome aggregation, widening of intercellular spaces, and lipid secretory defects. DSP encodes desmoplakin, a primary component of desmosomes, intercellular adhesion junctions most abundant in the epidermis and heart. Though mutations in DSP are known to cause other disorders, our cohort features the unique clinical finding of severe whole-body erythrokeratodermia, with distinct effects on localization of desmosomal proteins and connexin 43. These findings add a severe, previously undescribed syndrome featuring erythrokeratodermia and cardiomyopathy to the spectrum of disease caused by mutation in DSP, and identify a specific region of the protein critical to the pathobiology of EKC syndrome and to DSP function in the heart and skin. © The Author 2015. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  18. 基于定点DSP的航姿数据采集与处理系统%Navigation Position Data Acquisition and Processing System Based on Fixed-point DSP

    Institute of Scientific and Technical Information of China (English)

    罗琴; 赵忠华

    2012-01-01

    A kind of navigation position data acquisition and processing system was designed to implement the navigation data-s fast acqusition and real-time processing in AHRS. The analog signals came out of the MEMS accelerometers, gyroscopes and the magnetometer were sent to the AD converter. The converted data were processed by the fixed-point DSP. The dominant frequency of the ADSP - BF506F can reach 400 MHz, the floating point arithmetic can be simulated on fixed-point DSP. It can improve the data processing precision without affecting the real-time capability. This paper introduced the hardware ciucuit design of the system and the principle of the floating-point calculation on fixed-point DSP. This solution has many advantage such as low cost, strong antijamming capability and small power. It can implement data acqusition and processing effectively and the test effect is good. It can also provide convenience for the late work of attitude solving.%为实现航姿参考系统(AHRS)中航姿数据的快速采集和实时处理,设计一种基于定点DSP的航姿数据采集与处理系统.由微电子机械系统(MEMS)加速度传感器和陀螺仪以及三轴磁强计采集到的航姿数据通过高速模数转换器(ADC)转换成数字信号送入定点DSP进行处理,利用ADSP-BF506F的主频可达400 MHz的优势,用软件实现定点DSP模拟浮点运算,在保证实时性的前提下提高数据处理的精度.文中详细介绍了数据采集系统的硬件电路设计以及定点DSP模拟浮点运算的原理和试验方法.该系统方案成本低、抗干扰性强、功耗小,能够有效进行数据采集与处理工作,试验调试取得了良好的效果,为后期的姿态解算工作提供了便利.

  19. Performance of positive ion based high power ion source of EAST neutral beam injector

    Science.gov (United States)

    Hu, Chundong; Xie, Yahong; Xie, Yuanlai; Liu, Sheng; Xu, Yongjian; Liang, Lizhen; Jiang, Caichao; Li, Jun; Liu, Zhimin

    2016-02-01

    The positive ion based source with a hot cathode based arc chamber and a tetrode accelerator was employed for a neutral beam injector on the experimental advanced superconducting tokamak (EAST). Four ion sources were developed and each ion source has produced 4 MW @ 80 keV hydrogen beam on the test bed. 100 s long pulse operation with modulated beam has also been tested on the test bed. The accelerator was upgraded from circular shaped to diamond shaped in the latest two ion sources. In the latest campaign of EAST experiment, four ion sources injected more than 4 MW deuterium beam with beam energy of 60 keV into EAST.

  20. Implementation for Controller to Unified Single Phase Power Flow Using Digital Signal Processor (DSP-TMS320C31

    Directory of Open Access Journals (Sweden)

    Abdul Aziz Mohammed Al Buaijan,

    2014-08-01

    Full Text Available Presenting in his paper, Digital signal processor (DSP-based implementation of a single phase unified power flow controller (UPFC. For shunt side and series side An efficient UPFC control algorithm is achieved. Discussing the laboratory experimental results using DC source are taken as an UPFC linked by two ll-bridge PWM voltage source converters.