Sample records for choonpa kekkannai sanjigen

  1. New junction method of plastic by ultrasonic wave; Choonpa ni yoru plastic no shinsetsugoho

    Kaneko, S. [Shibaura Institute of Technology, Tokyo (Japan). Faculty of Engineering


    This paper describes three types of new junction methods for plastic in which ultrasonic energy is used. The node junction method by longitudinal vibration is based on the feature that the heat generation by ultrasonic energy is high in the node of amplitude distribution by vibration of a joined object. An impedance matching section is set among the tool, joined object, and jig, and the junction place is set in the node position of amplitude by longitudinal vibration to improve the efficiency. For the junction of a vessel cover, the power and operation efficiencies were improved. The junction method by torsional vibration uses torsional vibration instead of longitudinal vibration. The manufactured device has the characteristics that the sound output is 40 W when the vibration rate of a torsional vibrator is 1.61 m/s. In this case, the electric sound exchange efficiency is 92% at maximum. The junction of a tetrafluoroethylene sheet that is difficult in a longitudinal vibration system was tried as a preliminary experiment. As a result, the information on junction was obtained. In the junction method by a focusing ultrasonic wave, ultrasonic energy of several megahertzs is focused for junction. A PZT electrostrictive spherical vibrator is used. Junction is carried out in the focal area. The junction strength increases. 1 ref., 5 figs.

  2. Ultrasonic intrusion sensor using the Doppler effect; Choonpa Doppler hoshiki shinnyu sensor

    Kani, H.; Iwasaki, N.; Goto, M. [Nippon Soken, Inc., Tokyo (Japan); Tsuzuki, T.; Nakamura, T. [Denso Corp., Aichi (Japan)


    For vehicle anti-theft alarm systems which cope with vehicle and car component theft, EU initiated vehicle security regulations from Jan 1997. Also, the insurance industry has instituted the insurance certification of vehicle anti-theft alarm systems. We have developed an ultrasonic intrusion sensor using the doppler effect for vehicle anti-theft alarm systems specifically for these EU regulations and insurance certification. 2 refs., 7 figs., 1 tab.

  3. Automatic ultrasonic testing for welding structures; Choonpa ni yoru yosetsu kozobutsu no kensa no jidoka

    Yokono, Y. [Non-Destructive Inspection Co. Ltd., Osaka (Japan)


    Ultrasonic flow detection when compared with the radiation transmission detection, has advantages such as: it can be used even in thick plate, detection performance of surface defects like cracks or bad unification and so forth is good, possesses easier safety management and so forth. On the other hand, it is a manual testing and lacks memory, and has problem that the test results depend on the ability of technician and automation is preferred in many field. However, the manual scanning method of probe carried out by experienced technicians can not be replaced by automation because the signals obtained depend greatly on the surface condition of specimen, scanning speed of probe and welding pressure. At present, the memory capacity and computation ability of computer have been significantly developed and image processing and photo taking of the obtained results are carried out easily. In this report, practical image of ultrasonic flow detection of weld portion is discussed and some practical examples of automatic test devices for welding structures are introduced. 16 refs., 6 figs., 1 tab.

  4. Faults survey by 3D reflection seismics; Sanjigen hanshaho jishin tansa ni yoru danso chosa

    Tsuchiya, T.; Ejiri, T.; Yamada, N.; Narita, N.; Aso, H.; Takano, H.; Matsumura, M. [Dia Consultants Company, Tokyo (Japan)


    This paper describes fault survey by 3D seismic reflection exploration. Survey has been conducted mainly at flat land area without pavement not in urban area in Japan. Subsurface structure is complicated with intersecting multiple faults. In this area, a lot of geological investigations have been done prior to the seismic reflection exploration. Fairly certain images of faults have been obtained. However, there were still unknown structures. Survey was conducted at an area of 170m{times}280m in the CDP range. Measurements were carried out by using 100 g of dynamite per seismic generation point combined with 40 Hz velocity geophones. Fixed distribution consisting of lattice points of 12{times}12 was adopted as an observation method. In and around the lattice, a great number of explosions were carried out. The CDP stacking method and the method of migration after stacking were used for the data processing. The 3D structures of six horizons and five faults could be interpreted. Interpreted horizons were well agreed with the logging results. 3 figs.

  5. Research and development project of three-dimensional circuit devices. Sanjigen kairo soshi no kenkyu kaihatsu


    The research results in fiscal 1989 were reported of Research and development project of three-dimensional circuit devices'' promoted by NEDO. Formation of laminated SOI structure, through hole wiring and lamination of thin films were examined basically to arrange developmental subjects. Large dense laminated multi-functional integrated devices were studied precisely for moving body detection, image processing and character recognition in which photo-sensing and signal processing functions were integrated. Verification devices were fabricated to evaluate the four-layer laminated structure for (1) the image profile extraction device composed of four-layer circuits for signal input, sensor output, A/D conversion and difference calculation between adjacent image elements, (2) the moving body detection device composed of the 64 {times} 64 array of three-dimensional unit cells, and (3) the character recognition device composed of four-layer circuits for photo-sensing/ photoelectric conversion, digitalization/majority decision, daata masking and character comparison. 3 figs.

  6. Three-dimensional simulator and welding application system; Sanjigen simulator to yosetsu jidoka eno tekiyo jirei

    Inaba, K. [Mitsui Engineering and Shipbuilding Co. Ltd., Tokyo (Japan)


    This paper introduces application examples of three-dimensional simulator, CimStation, to the automation of welding. The CimStation can be used for the design of robots, layout design of work cells, and construction of operation programs. The utilization procedures are illustrated. Shape modeling of robots and works can be conducted using CAD function. Models of automatized equipment can be made in the work cells. Relative position between the modeled equipment and object in the work cell can be determined by the interference check function. Operation programs are constructed by specifying work points, welding speed and welding time. Relative position of the model and absolute position of the equipment are corrected. The operation program is converted into operation data. Some application examples are illustrated. Off-line teaching using the simulator is applied to machining of curve panel plates using 3D laser machining unit. The robot program is made in the design of spot welding and assembly process. Layout design is conducted for arc welding. 6 figs.

  7. Near-surface 3D reflections seismic survey; Sanjigen senso hanshaho jishin tansa

    Nakahigashi, H.; Mitsui, H.; Nakano, O.; Kobayashi, T. [DIA Consultants Co. Ltd., Tokyo (Japan)


    Faults are being actively investigated across Japan since the Great Hanshin-Awaji Earthquake. Discussed in this report is the application of the 3D near-surface reflection seismic survey in big cities. Data from trenching and drilling is used for the geological interpretation of the surroundings of a fault, and the reflection seismic survey is used to identify the position, etc., of the fault. In this article, when the results obtained from the experimental field are examined, it is found that the conventional 2D imaging reflection survey betrays the limit of its capability when the geological structure is complicated, that the 3D reflection seismic survey, on the contrary, is capable of high-precision imaging and, when augmented by drilling, etc., becomes capable of a more detailed interpretation, and that it also contributes effectively to the improvement of local disaster prevention in big cities. Using as the model the Tachikawa fault that runs near JR Tachikawa Station, embodiment of the 3D reflection seismic survey is reviewed. For the acquisition of data excellent in quality in a 3D reflection seismic survey conducted utilizing the roads in the sector chosen for experiment in the urban area, the shock generating points and receiving points should be positioned by taking into account the parameters in the bin arranging process so that the mid-points will be regularly distributed on the surface. 3 refs., 11 figs., 1 tab.

  8. 3D pre-stack time migration; Kiruhihoffuho ni yoru sanjigen jugo mae jikan migration shori

    Nakajima, Y.; Matsuoka, T. [Japan Petroleum Exploration Corp., Tokyo (Japan); Tsuru, T. [Japan National Oil Corp., Tokyo (Japan)


    This paper reports pre-stack migration in elastic wave exploration as to its algorithm and examples of processed data. The time migration processing hypothesizes that seismic waves propagate linearly. It calculates travel time by dividing the sum of the straight distance from a vibration transmitting point to an image point and the straight distance from the image point to a vibration receiving point with RMS velocity given as a parameter. To maintain the relative relation of amplitude sizes, the signal on an elliptic body is made smaller in inverse proportion to the size of that elliptic body. With regard to apparent interval of input trace as seen from the reflection surface, or with regard to density, the signal is made smaller by cos{theta} times. While this program deals with three-dimensional migration, its output turns out as an arbitrary two-dimensional plane. The program requires a huge amount of data processing, whereas a method is used, that the input trace is divided, each group is processed by using separate computers, and the results are summed up. 3 refs., 4 figs.

  9. Three dimensional wavefield modeling using the pseudospectral method; Pseudospectral ho ni yoru sanjigen hadoba modeling

    Sato, T.; Matsuoka, T. [Japan Petroleum Exploration Corp., Tokyo (Japan); Saeki, T. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center


    Discussed in this report is a wavefield simulation in the 3-dimensional seismic survey. With the level of the object of exploration growing deeper and the object more complicated in structure, the survey method is now turning 3-dimensional. There are several modelling methods for numerical calculation of 3-dimensional wavefields, such as the difference method, pseudospectral method, and the like, all of which demand an exorbitantly large memory and long calculation time, and are costly. Such methods have of late become feasible, however, thanks to the advent of the parallel computer. As compared with the difference method, the pseudospectral method requires a smaller computer memory and shorter computation time, and is more flexible in accepting models. It outputs the result in fullwave just like the difference method, and does not cause wavefield numerical variance. As the computation platform, the parallel computer nCUBE-2S is used. The object domain is divided into the number of the processors, and each of the processors takes care only of its share so that parallel computation as a whole may realize a very high-speed computation. By the use of the pseudospectral method, a 3-dimensional simulation is completed within a tolerable computation time length. 7 refs., 3 figs., 1 tab.

  10. Investigation of data acquisition parameters for Minami Noshiro 3D experiment using 3D seismic modeling; Sanjigen hado denpa modeling wo riyoshita Minami Noshiro sanjigen jishin tansa data shutoku parameter no kento

    Tanaka, H.; Nakagami, K.; Minegishi, M. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center; Kano, R. [Teikoku Oil Co. Ltd., Tokyo (Japan)


    This paper describes how to grasp the characteristics of reflected waves which means how the reflected wave can be received in its magnitude depending on the complicated subsurface structure. Data acquisition parameters were also investigated, as to offset distance distribution and mute setting during the HMO correction. A velocity structure model was prepared for an area of 9km{times}8km including the given 3D seismic exploration area at Minami Noshiro, Akita Prefecture. For the geological sequence used for the velocity structure model, three formations, i.e., Katsurane Formation, Funakawa Formation, and Onagawa Formation, were inputted in an order from the shallower depth on the basis of the depth structure profile obtained from the previous data. Ray tracing was calculated by means of the two-dot dashed line tracing method. For this method, amplitude as well as travel time of waves can be calculated at the same time. This was effective for grasping the magnitude of reflected wave on simulating the traced data. For the velocity structure model used in this study, existing data inputted were old, which limited the quantity of information. However, this model would sufficiently contribute to the verification of survey design and the determination of optimal layout. 1 ref., 3 figs.

  11. Three-dimensional analysis of the magnetic structure in Hokkaido, Japan; Hokkaido no sanjigen jiki kozo kaiseki

    Makino, M. [Geological Survey of Japan, Tsukuba (Japan)


    The magnetic structure in Hokkaido was quantitatively analyzed by the magnetic anomaly distribution. This paper describes its characteristics. Detection of structural boundaries and 3-D analysis of double-layer structure were conducted for the regional magnetic data in a region with about 500 km square. There was not so large difference in patterns of magnetic anomaly distribution between the case that the direction of magnetization was set at 45{degree} to the west during the geomagnetic conversion according to Segawa and Oshima and the case that it was set as same as the current geomagnetic direction. The method of Blakely and Simpson was useful to detect the boundaries of magnetic structures. The structural boundaries obtained were more linear than the iso-magnetic contour lines. A new method has been conceived in which the approximation of 3-D magnetic structure analysis can be deduced, and the irregularity of magnetic basement can be determined by the repeated calculation. In practice, this method was applied to the magnetic data in the whole Hokkaido. The calculation was stably converged. It was found that the magnetic structure obtained in the Kamuikotan/Ishikari-Kitakami magnetic belt exhibited a fault structure having steep slopes accompanied by the basin structure in the western boundaries. 19 refs., 6 figs.

  12. Tri-axial of thermally induced pre-strain for composite superconductors; Fukugo chodendosen no sanjigen netsuyugami kaiseki

    Tsukii, T.; Murase, S.; Murakami, T.; Naito, H.; Shimamoto, S. [Tohoku Univ., Sendai (Japan). Graduate School of Engineering


    A three-dimensional elastic analysis was carried out on bronze method Nb{sub 3}Sn wire, Cu-63Nb reinforced bronze method Nb{sub 3}Sn wire, Cu-17Nb reinforced bronze method Nb{sub 3}Sn wire, Ta reinforced bronze method Nb{sub 3}Sn wire, tube method Nb{sub 3}Sn wire, Jelly-roll method Nb{sub 3}Sn wire and silver sheath Bi system wire. An axis symmetric model composed of a core of compound superconductive wires and N concentric cylinders surrounding them was used for this analysis. The results of thermal strain elastic analysis revealed that, though compressive strain in r and {theta} directions was small compared with that in z direction, strains in r direction of Ta core reinforced Nb{sub 3}Sn wire and tube method Nb{sub 3}Sn wire were tensile strains. (NEDO)

  13. Three-dimensional magnetotelluric modeling using SLDM method; Supekutoru bunkai wo fukashita ranchosu process ni motozuku MT ho sanjigen keisan

    Yamane, K.; Takasugi, S. [GERD Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan)


    For 3-D magnetotelluric (MT) modeling, spectral Lanczos decomposition method (SLDM) was applied as high-speed high- accuracy modeling algorithm. SLDM was developed by Druskin to reduce computational time considerably by obtaining responses in the whole frequency domain all at once. The computational time of 3-D modeling was reduced by introducing Maxwell`s equation and Lanczos matrix as transformation matrix. The computation was carried out on the 1km{times}2km{times}2km low resistivity model body of 5 ohm{center_dot}m supposed in the uniform ground of 100 ohm{center_dot}m using 43{times}43{times}31 nodes at 17 frequencies ranging from 0.01Hz to 100Hz. Apparent resistivity at lower frequency decreased with approach to the low resistivity body. The computational time amounted to 6 hours 14 minutes. The 3-D MT modeling using SLDM method was independent of frequency, and its algorithm was superior in computational speed, however, it was inferior in computational time as the number of measuring nodes increased. 2 refs., 3 figs.

  14. Three dimensional reflection velocity analysis based on velocity model scan; Model scan ni yoru sanjigen hanshaha sokudo kaiseki

    Minegishi, M.; Tsuru, T. [Japan National Oil Corp., Tokyo (Japan); Matsuoka, T. [Japan Petroleum Exploration Corp., Tokyo (Japan)


    Introduced herein is a reflection wave velocity analysis method using model scanning as a method for velocity estimation across a section, the estimation being useful in the construction of a velocity structure model in seismic exploration. In this method, a stripping type analysis is carried out, wherein optimum structure parameters are determined for reflection waves one after the other beginning with those from shallower parts. During this process, the velocity structures previously determined for the shallower parts are fixed and only the lowest of the layers undergoing analysis at the time is subjected to model scanning. To consider the bending of ray paths at each velocity boundaries involving shallower parts, the ray path tracing method is utilized for the calculation of the reflection travel time curve for the reflection surface being analyzed. Out of the reflection wave travel time curves calculated using various velocity structure models, one that suits best the actual reflection travel time is detected. The degree of matching between the calculated result and actual result is measured by use of data semblance in a time window provided centering about the calculated reflective wave travel time. The structure parameter is estimated on the basis of conditions for the maximum semblance. 1 ref., 4 figs.

  15. Suppression of 3D coherent noise by areal geophone array; Menteki jushinki array ni yoru sanjigen coherent noise no yokusei

    Murayama, R.; Nakagami, K.; Tanaka, H. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center


    For improving the quality of data collected by reflection seismic exploration, a lattice was deployed at one point of a traverse line, and the data therefrom were used to study the 3D coherent noise suppression effect of the areal array. The test was conducted at a Japan National Oil Corporation test field in Kashiwazaki City, Niigata Prefecture. The deployed lattice had 144 vibration receiving points arrayed at intervals of 8m composing an areal array, and 187 vibration generating points arrayed at intervals of 20m extending over 6.5km. Data was collected at the vibration receiving points in the lattice, each point acting independently from the others, and processed for the composition of a large areal array, with the said data from plural vibration receiving points added up therein. As the result of analysis of the records covering the data collected at the receiving points in the lattice, it is noted that an enlarged areal array leads to a higher S/N ratio and that different reflection waves are emphasized when the array direction is changed. 1 ref., 6 figs.

  16. Three-dimensional TDEM modeling using integral equation method. 2; Sekibun hoteishikiho ni yoru TDEM no sanjigen modeling. 2

    Noguchi, K.; Endo, M. [Waseda University, Tokyo (Japan). School of Science and Engineering


    A study was made about integral equation-assisted numerical calculation in a time domain electromagnetic (TDEM) 3D modeling. The total number of cells should be minimized now that the time required for calculation depends a great deal upon the total number of cells. On the assumption of a thin plate-like layer of anomaly in presence, with its center positioned just below the receiving point and with its entirety buried in a homogeneous 100 Ohm m medium, the correlation between the distance and the maximum cell length in the horizontal direction and the method of dividing were examined. As the result, it was found that a dividing method respecting the exponential function shortens the calculation time and that, for obtaining a true response and for minimizing the calculation time, the length of the horizontal side of the cell nearest to the transmission source needs be set to be not more than 1/2 of the distance. It was also found that the length of the side in the direction of depth of the topmost cell needs be set to be not more than approximately 1/3 of the depth of the upper surface of the plate-shaped anomaly. 2 refs., 10 figs., 2 tabs

  17. 3D seismic experiment in difficult area in Japan; Kokunai nanchiiki ni okeru sanjigen jishin tansa jikken

    Minegishi, M.; Nakagami, K.; Tanaka, H. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center


    Difficult area in this context means an exploration-difficult area supposed to store oil/gas but retarded in exploration for the lack of knowledge about the geological structure due to poor quality of available seismic survey records. Discussed in this paper is a survey conducted into an area covering the southern part of Noshiro-shi, Akita-ken, and Yamamoto-cho, Yamamoto-gun, Akita-ken. An area size suitable for data collection at a target depth of 2500m is determined using an interpretation structure compiled on the basis of available well data and 2D seismic survey data. The plan for siting shock points and receiving points is modified case by case as restrictive factors come to the surface (resulting from the complicated hilly terrain, presence of pipes for agricultural water, etc.). The peculiarities of seismic waves in the terrain are studied through the interpretation of the available well data and 2D seismic survey data for the construction of a 3D velocity model for the confirmation of the appropriateness of the plan for siting shock points and receiving points. Efforts are exerted through enhanced coordination with the contractor to acquire data so that a technologically best design may be won within the limits of the budget. The quality of the data obtained from this experiment is in general better than those obtained from previous experiments, yet many problems remain to be settled in future studies about exploration-difficult areas. 4 refs., 4 figs., 1 tab.

  18. Flat plate approximation in the three-dimensional slamming; Heiban kinji ni yoru sanjigen suimen shogeki keisanho ni tsuite

    Toyama, Y. [Mitsui Engineering and Shipbuilding Co. Ltd., Tokyo (Japan)


    A slamming load generated by interactive motions between a ship body and water face is an important load in ensuring safety of the ship. A flat plate approximation developed by Wagner is used as a two-dimensional slamming theory, but it has a drawback in handling edges of a flat plate. Therefore, an attempt was made to expand the two-dimensional Wagner`s theory to three dimensions. This paper first shows a method to calculate water face slamming of an arbitrary axisymmetric body by using circular plate approximation. The paper then proposes a method to calculate slamming pressure distribution and slamming force for the case when shape of the water contacting surface may be approximated by an elliptic shape. Expansion to the three dimensions made clear to some extent the characteristics of the three-dimensional slamming. In the case of two dimensions or a circular column for example, the water contacting area increases rapidly in the initial stage generating large slamming force. However, in the case of three dimensions, since the water contacting area expands longitudinally and laterally, the slamming force tends to increase gradually. Maximum slamming pressure was found proportional to square of moving velocity in a water contacting boundary in the case of three dimensions, and similar to stagnation pressure on a gliding plate. 12 refs., 17 figs., 1 tab.

  19. Measurements of ultrasonic waves by means of laser Doppler velocimeter and an experimental study of elastic wave propagation in inhomogeneous media; Laser doppler sokudokei ni yoru choonpa keisoku to ganseki wo mochiita fukinshitsu baishitsu no hado denpa model jikken

    Nishizawa, O.; Sato, T. [Geological Survey of Japan, Tsukuba (Japan); Lei, X. [Dia Consultants Company, Tokyo (Japan)


    In the study of seismic wave propagation, a model experimenting technique has been developed using a laser Doppler velocimeter (LDV) as the sensor. This technique, not dependent on conventional piezoelectric devices, only irradiates the specimen with laser to measure the velocity amplitude on the target surface, eliminating the need for close contact between the specimen and sensor. In the experiment, elastic penetration waves with their noise levels approximately 0.05mm/s were observed upon application of vibration of 10{sup 6}-10{sup 5}Hz. The specimen was stainless steel or rock, and waveforms caught by the LDV and piezoelectric device were compared. As the result, it was found that the LDV is a powerful tool for effectively explaining elastic wave propagation in inhomogeneous media. The piezoelectric device fails to reproduce accurately the waves to follow the initial one while the LDV detect the velocity amplitude on the specimen surface in a wide frequency range encouraging the discussion over the quantification of observed waveforms. 10 refs., 7 figs.

  20. Pseudo-random data acquisition geometry in 3D seismic survey; Sanjigen jishin tansa ni okeru giji random data shutoku reiauto ni tsuite

    Minegishi, M.; Tsuburaya, Y. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center


    Influence of pseudo-random geometry on the imaging for 3D seismic exploration data acquisition has been investigate using a simple model by comparing with the regular geometry. When constituting wave front by the interference of elemental waves, pseudo-random geometry data did not always provide good results. In the case of a point diffractor, the imaging operation, where the constituted wave front was returned to the point diffractor by the interference of elemental waves for the spatial alias records, did not always give clear images. In the case of multi point diffractor, good images were obtained with less noise generation in spite of alias records. There are a lot of diffractors in the actual geological structures, which corresponds to the case of multi point diffractors. Finally, better images could be obtained by inputting records acquired using the pseudo-random geometry rather than by inputting spatial alias records acquired using the regular geometry. 7 refs., 6 figs.

  1. Three-dimensional seismic survey planning based on the newest data acquisition design technique; Saishin no data shutoku design ni motozuku sanjigen jishin tansa keikaku

    Minehara, M.; Nakagami, K.; Tanaka, H. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center


    Theory of parameter setting for data acquisition is arranged, mainly as to the seismic generating and receiving geometry. This paper also introduces an example of survey planning for three-dimensional land seismic exploration in progress. For the design of data acquisition, fundamental parameters are firstly determined on the basis of the characteristics of reflection records at a given district, and then, the layout of survey is determined. In this study, information through modeling based on the existing interpretation of geologic structures is also utilized, to reflect them for survey specifications. Land three-dimensional seismic survey was designed. Ground surface of the surveyed area consists of rice fields and hilly regions. The target was a nose-shaped structure in the depth about 2,500 m underground. A survey area of 4km{times}5km was set. Records in the shallow layers could not obtained when near offset was not ensured. Quality control of this distribution was important for grasping the shallow structure required. In this survey, the seismic generating point could be ensured more certainly than initially expected, which resulted in the sufficient security of near offset. 2 refs., 2 figs.

  2. 3-D reconstruction of skin surface from photometric stereo images with specular and inter reflections; Kyomen hansha sogo hansha wo koryoshita hifu hyomen bisai keijo no sanjigen saikosei

    Matsumoto, A.; Saito, H.; Ozawa, S. [Keio University, Tokyo (Japan)


    This paper describes a new method for reconstructing the structure of a skin surface replica from three shading images taken from three different lightings. Since the shading images include specular and inter reflections, the conventional photometric stereo method is not suitable for reconstructing its surface structure. In the proposed method, the evaluation function of the surface shape is defined, then the structure is reconstructed by optimizing the evaluation using simulated annealing. The experimental results from both synthetic images and real images demonstrate that proposed method is more effective for shape reconstruction from shading images which include specular and inter reflections. 15 refs., 15 figs., 1 tab.

  3. Report on 1981 research result on the R and D of three-dimensional circuit element; 1981 nendo sanjigen kairo soshi no kenkyu kaihatsu



    For the purpose of contributing to the efficient R and D of three-dimensional circuit element technologies (laminated high density integrated element technology, laminated high-speed multi-functional integrated element technology, and laminated large capacity multi-functional integrated element technology), conducted were the survey of domestic and overseas technological trend, investigation of progress status of R and D, and extraction and analysis of problems concerning R and D. In the technological trend survey, the technologies that could sprout in the future were investigated and examined. In addition, examined as much as possible at the present time were the appearance as a device imaginable at the time of the development of the three-dimensional circuit element technology, the point at issue, essential technologies for the development of the element, etc., with the results reported. A report was made on the technology of obtaining a silicon crystal layer on an insulating object. The status quo of a technology for forming an insulated film suitable for a silicon multi-layer structure and of a technology for forming an electrode material was explained, as was a layer forming technology for an insulating object and a metallic material concerning a compound semiconductor layer technology. With the present status summarized on an image sensor in two dimensions, the transmission electron microscope method was introduced. Last of all, investigation results were compiled on the state of progress of each research for the three-dimensional circuit element technology. (NEDO)

  4. Research and development project of nonlinear photoelectronic materials. ; Three-dimensional super structure thin films. Hisenkei hikari denshi zairyo no kenkyu kaihatsu. ; Sanjigen chokozoka gijutsu no kenkyu kaihatsu


    The research results in fiscal 1989 were reported of Research and development project of nonlinear photoelectronic three-dimensional super structure thin films'' promoted by NEDO. Low melting point borosilicate glass with a large amount of Na was selected as matrix, and after its various forming conditions as heat treatment were examined, the prototype homogeneous strainless glass target of 100mm in diameter was prepared for spattering. The glass thin film including dense CdS semiconductive fine particles of nearly 10% in atomic ratio was formed by high frequency spattering, and a quantum size effect was observed on it because of considerable blue shift in emission and absorption spectra. The super lattice thin film of Zn-Cd-S system compound semiconductor was formed by a molecular beam epitaxy method, and its super lattice structure with highly flat boundaries was observed by X-ray diffraction analysis as well as its high purity and only a few defects observed by low temperature photoluminescence analysis. 2 figs.

  5. Three-dimensional CAE/CAD/CAM system, ANVIL-5000, and examples of application. Sanjigen CAE/CAD/CAM system ANVIL-5000 to tekiyo jirei

    Kanno, M.; Miyata, M. (Toshiba Corp., Tokyo (Japan))


    Several functions of the three-dimensional CAE/CAD/CAM system (ANVIL-5000) are outlined and some applications are also illustrated. The system is composed of four main functions, the CAD function for three-dimensional design/drafting, CAM function to generate NC data for 2-5 axis machining, OMNISOLIDS function to generate solid models, and OMNIFEM function to generate FEM meshes from solid models. The following new functions have been added to the system recently: (1) the dynamic rotation function to rotate solid models around every axis along with their shading, (2) the draft line function for drafting using draft lines erasable after completion of drawings, and (3) the multi-part access function to copy needed graphic forms from a reference drawing to a drawing under working. Its applications to the design and manufacturing are illustrated of IC lead frame dies in a semiconductor factory and molds in an AV appliance factory. 1 ref., 7 figs.

  6. Three dimensional numerical modeling for ground penetrating radar using finite difference time domain (FDTD) method; Jikan ryoiki yugen sabunho ni yoru chika radar no sanjigen suchi modeling

    Sanada, Y.; Ashida, Y.; Sassa, K. [Kyoto University, Kyoto (Japan)


    3-D numerical modeling by FDTD method was studied for ground penetrating radar. Radar radiates electromagnetic wave, and determines the existence and distance of objects by reflection wave. Ground penetrating radar uses the above functions for underground surveys, however, its resolution and velocity analysis accuracy are problems. In particular, propagation characteristics of electromagnetic wave in media such as heterogeneous and anisotropic soil and rock are essential. The behavior of electromagnetic wave in the ground could be precisely reproduced by 3-D numerical modeling using FDTD method. FDTD method makes precise analysis in time domain and electric and magnetic fields possible by sequentially calculating the difference equation of Maxwell`s equation. Because of the high calculation efficiency of FDTD method, more precise complicated analysis can be expected by using the latest advanced computers. The numerical model and calculation example are illustrated for surface type electromagnetic pulse ground penetrating radar assuming the survey of steel pipes of 1m deep. 4 refs., 3 figs., 1 tab.

  7. Three-dimensional mise-a-la-masse modeling using horizontal well; Suihei kosei wo mochiita ryuden den`iho no sanjigen modeling

    Mizunaga, H.; Ushijima, K.; Hashimoto, K.; Masuda, K. [Kyushu University, Fukuoka (Japan). Faculty of Engineering


    The 3-D model program was developed to apply a mise-a-la-masse method to linear current sources with optional shapes. Mise-a-la-masse method is a bipolar mapping survey method using current sources installed in wells, and recently has been widely used for direct exploration of geothermal reservoirs. This method is also used for monitoring underground fluid as electrode arrangement of fluid flow tomography for surveying underground fluid (geothermal fluid, underground water, petroleum). In the geothermal reservoir exploration, the casing pipes of wells are used as linear current sources, and measured data are processed as those based on vertical current source. In the largely inclined well, the inclination of current sources should be considered. The 3-D modeling program was developed by difference calculus using the theoretical potential equation and apparent resistivity based on linear current sources with optional 3-D shapes. The numerical model experiment result clarified that the previous theoretical equation for vertical wells is inapplicable to inclined linear current sources because of clear asymmetric apparent resistivity distribution. 6 refs., 6 figs.

  8. Three dimensional transient electromagnetic model study for fracture prediction from tunnel face; Sanjigen model keisan ni yoru TEM ho no tunnel zenpo tansa eno tekiyosei no kento

    Wada, K.; Tsutsui, T.; Saito, A. [Mitsui Mineral Development Engineering Co. Ltd., Tokyo (Japan); Hara, T. [Toda Corp., Tokyo, (Japan); Zhdanov, M. [University of Utah, UT (United States)


    In order to apply TEM model to fracture prediction at tunnel face, 3-D TEM model computation by FEM was conducted by installing a transmission loop on a tunnel face. MT field responses diffusing into the 3-D model were computed by time-domain difference calculus, and analytical precision was improved by introducing a staggered grid method. In the case where a low resistive zone exists before a tunnel face, time variance in diffused eddy current and induction current in the low resistive zone could be obtained. The difference in tunnel-axial transient curve (transient phenomenon curve in magnetic field) between uniform medium and low resistive zone models was based on the absorption process of diffused eddy current into the low resistive zone, and the expanding process of it toward the outside. Change in background condition could be predicted from the background and the ratio of transient curves every measurement. The detection limit of the low resistive zone was dependent on resistivity contrast, distance and geometry. Fluctuation in measurement due to noises and S/N ratio were also essential. 3 refs., 10 figs.

  9. 3-D volume rendering visualization for calculated distributions of diesel spray; Diesel funmu kyodo suchi keisan kekka no sanjigen volume rendering hyoji

    Yoshizaki, T.; Imanishi, H.; Nishida, K.; Yamashita, H.; Hiroyasu, H.; Kaneda, K. [Hiroshima University, Hiroshima (Japan)


    Three dimensional visualization technique based on volume rendering method has been developed in order to translate calculated results of diesel combustion simulation into realistically spray and flame images. This paper presents an overview of diesel combustion model which has been developed at Hiroshima University, a description of the three dimensional visualization technique, and some examples of spray and flame image generated by this visualization technique. 8 refs., 8 figs., 1 tab.

  10. Optimization of the catalytic converter internal flow by using 3D-CFD; Sanjigen nagare kaiseki ni yoru shokubai converter nai nagare no saitekika

    Toi, M.; Sugiura, S. [Toyota Motor Corp., Tokyo (Japan)


    By using computational fluid dynamics and statistical quality control method, we investigated the contribution of front and rear catalytic converter cone shape for the pressure loss and the partial flow, also led the optimal terms and the predictional formulations efficiently. According to this, we can investigate the optimal position of the catalytic converter from the planning. 8 figs., 6 tabs.

  11. Improvement of wells turbine performance by means of 3D guide vanes; Sanjigen annai hane ni yoru wells turbine seino no kaizen

    Takao, M.; Kim, T.H. [Saga University, Saga (Japan); Setoguchi, T. [Saga University, Saga (Japan). Faculty of Science and Engineering; Inoue, M. [Kyushu University, Fukuoka (Japan). Faculty of Engineering


    Performance of a Wells turbine was improved by equipping 3D guide vanes before and behind a rotor. For further improvement, 3D guide vanes have been proposed in this paper. The performance of the Wells turbine with 2D and 3D guide vanes have been investigated experimentally by model testing under steady flow conditions. Then, the running and starting characteristics in irregular ocean waves have been obtained by a computer simulation. As a result, it is found that both of the running and starting characteristics of the Wells turbine with 3D guide vanes are superior to those of the turbine with 2D guide vanes. (author)

  12. Fundamental study of interpretation technique for 3-D magnetotelluric data using neural networks; Neural network wo mochiita sanjigen MT ho data kaishaku gijutsu no kisoteki kenkyu

    Kobayashi, T.; Fukuoka, K.; Shima, H. [Oyo Corp., Tokyo (Japan); Mogi, T. [Kyushu University, Fukuoka (Japan). Faculty of Engineering; Spichak, V.


    The research and development have been conducted to apply neural networks to interpretation technique for 3-D MT data. In this study, a data base of various data was made from the numerical modeling of 3-D fault model, and the data base management system was constructed. In addition, an unsupervised neural network for treating noise and a supervised neural network for estimating fault parameters such as dip, strike and specific resistance were made, and a basic neural network system was constructed. As a result of the application to the various data, basically sufficient performance for estimating the fault parameters was confirmed. Thus, the optimum MT data for this system were selected. In future, it is necessary to investigate the optimum model and the number of models for learning these neural networks. 3 refs., 5 figs., 2 tabs.

  13. Indirect boundary element method for three dimensional problems. Analytical solution for contribution to wave field by triangular element; Sanjigen kansetsu kyokai yosoho. Sankakukei yoso no kiyo no kaisekikai

    Yokoi, T. [Building Research Institute, Tokyo (Japan); Sanchez-Sesma, F. [Universidad National Autonoma de Mexico, (Mexico). Institute de Ingenieria


    Formulation is introduced for discretizing a boundary integral equation into an indirect boundary element method for the solution of 3-dimensional topographic problems. Yokoi and Takenaka propose an analytical solution-capable reference solution (solution for the half space elastic body with flat free surface) to problems of topographic response to seismic motion in a 2-dimensional in-plane field. That is to say, they propose a boundary integral equation capable of effectively suppressing the non-physical waves that emerge in the result of computation in the wake of the truncation of the discretized ground surface making use of the wave field in a semi-infinite elastic body with flat free surface. They apply the proposed boundary integral equation discretized into the indirect boundary element method to solve some examples, and succeed in proving its validity. In this report, the equation is expanded to deal with 3-dimensional topographic problems. A problem of a P-wave vertically landing on a flat and free surface is solved by the conventional boundary integral equation and the proposed boundary integral equation, and the solutions are compared with each other. It is found that the new method, different from the conventional one, can delete non-physical waves from the analytical result. 4 figs.

  14. Simulation study using 3-D wavefield modeling for oil and gas exploration; Sanjigen hadoba modeling wo mochiita sekiyu tanko no simulation study

    Sato, T.; Matsuoka, T. [Japan Petroleum Exploration Corp., Tokyo (Japan); Saeki, T. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center


    As the surroundings of objects of oil exploration grow more complicated, seismic survey methods have turned 3-dimensional and, in this report, several models are examined using the 3-dimensional simulation technology. The result obtained by the conventional wave tracking method is different from actual wavefields, and is unrealistic. The difference method among the fullwave modelling methods demands an exorbitantly long computation time and high cost. A pseudospectral method has been developed which is superior to the difference method, and has been put to practical use thanks to the advent of parallel computers. It is found that a 3-dimensional survey is mandatory in describing faults. After examining the SEG/EAGE Salt model, it is learned that the salt is well-developed and that 3-dimensional depth migration is required for sub-salt exploration. It is also found through simulation of the EAGE/S Overthrust model, which is an elastic model, that no quality records are available on thrust zones in complicated terrains. The records are poor in quality since the actually measured wavefield is regarded as an acoustic wavefield when it is an elastic wavefield. 1 refs., 18 figs., 2 tabs.

  15. Numerical computation of transonic potential flow about three-demensional inlets. Sanjigen kuki toriireguchi mawarino sen'onsoku potensharu nagareno suchikeisan

    Nakamura, Takashi


    It is essential to solve numerically the transonic flow around the air inlet precisely and effectively in order to design the transonic aircraft nacelle/inlet. A computer algorithm was developed to compute numerically the transonic potential flow around the air inlet of fan-jet engine and others. The full potential equation in conserved form which is the pricipal equation can be solved with AF2 approximate factorization scheme. The grid used for computation was generated by the conformal mapping method. The point on central line becomes a singular point by transformation of coordinate system, so that another solution is applied to this point. This algorithm could compute the three dimensional transonic flow field about axisymmetric or asymmetric nacelle/inlet configurations with or without centerbody stably and effectively. (12 figs, 14 refs)

  16. Report on achievements of research and development of an automatic sewing system in fiscal 1988. Three-dimensional flexible sub-system; 1988 nendo jido hosei system no kenkyu kaihatsu seika hokokusho. Sanjigen flexible sub system



    The Automatic Sewing System Technology Research Association was commissioned from the Agency of Industrial Science and Technology on research of a production system by apparel types and systematization of an experiment plant. As the research on systematizing the experiment plant, the association is tackling with the researches on a high-speed laser cutting sub-system, a flexible sewing sub-system, a hi-tech assembling sub-system, and a three-dimensional flexible pressing sub-system. This paper reports the achievement of the research and development on the three-dimensional flexible pressing sub-system. It was intended to move forward development of technologies to put on and take off apparels and transport products, to achieve interlocking with other component technologies, and to structure an efficient pressing and processing system for finish. An experiment plant was built for ladies' blazer coats set as objects of model wears. The plant operation experiments and comprehensive evaluation are scheduled to be performed in fiscal 1990. Therefore, basic design research was carried out on an automatic put-on/take-off device and an auto-hanger system with an objective of application of the experimental plant. Studies on accuracy improvement was executed in the research of setting shapes of flexible dummies. In the research of pressing conditions, application of the 'estimation type information retrieval and control system' was studied. As a result, achievements were obtained as nearly as has been initially intended. (NEDO)

  17. Leading research report for fiscal 1998. Research and study of 3-dimensional cell structure module engineering; 1998 nendo sendo chosa kenkyu hokokusho. Sanjigen saibo soshiki module kogaku chosa kenkyu



    For the formation of cellular tissues to replace bionic tissues, researches were conducted about technologies of forming bionic tissue modules by culturing various kinds of cells. As for the materials and methods for constructing cellular tissues, researches were conducted about the trends of research and development of 3-dimensional tissue culturing matrices and materials for micromanipulation. As for the development of technologies for the functionalization of 3-dimensionally structured cells, research and study were conducted about the technology of 3-dimensional cell structure organization through application of physical stimulation, the biochemical technology of differentiation inducing, and the differentiation inducing technology for hetero tissue culturing. As for the development of technologies for evaluation using 3-dimensionally structured cells, light CT (computer tomography), analysis and evaluation using spectroscopy and the like, feasibility of the biochemical analysis of the cell state using biosensors, technologies for measuring the secretion of carcinogenic and toxic substances, etc., were studied. In addition, the development of organic models to replace test animals, industrial evolution of 3-dimensional tissue module engineering, etc., were investigated. (NEDO)

  18. On the calculation of scattered fields by 3-D structure in the time-domain electromagnetic (TDEM) method; Jikan ryoiki denjiho ni okeru sanjigen kozo kara no sanranba no keisan ni tsuite

    Murakami, Y. [Geological Survey of Japan, Tsukuba (Japan); Saito, A.; Oya, T. [Mitsui Mineral Development Engineering Co. Ltd., Tokyo (Japan)


    This paper describes the calculation method of 3-D underground structures in TDME method which measures only field components. Recently, FDTD method was developed as calculation method in time domain difference calculus, and the forward analysis accuracy of 3-D fields was rapidly improved. The survey results using a large-scale loop (600m{times}360m) were numerically analyzed by FDTD method. 16 measuring lines were prepared in both X and Y directions, and measuring points were prepared on intersection points of the measuring lines. Since signal current is staircase one, step and impulse responses of the ground were determined by calculating magnetic field and its time differentiation. The rectangular body (120m{times}120m{times}100m) of 0.2S/m in conductivity (5 ohm m in resistivity) was installed 160m under the ground as 3-D resistivity anomaly. The ground of 0.01S/m (100 ohm m) was assumed. Time variation in horizontal magnetic field vector plot of impulse responses of the uniform ground could be observed. The position of the resistivity anomaly could be also determined from spacial differentiation of magnetic field of grid pattern measuring points. 1 ref., 6 figs.

  19. Three-dimensional analysis of internal flow characteristics in the injection nozzle tip of direct-injection diesel engines; Sanjigen suchi kaiseki ni yoru DI diesel kikan no nenryo funsha nozzle nai ryudo tokusei no kaimei

    Ogawa, H.; Matsui, Y.; Kimura, S. [Nissan Motor Co. Ltd. Tokyo (Japan)


    To reduce the exhaust emissions and fuel consumption of direct-injection diesel engines, it is essential to optimize the fuel injection equipment closely related to combustion and emission characteristics. In this study, three-dimensional computation has been applied to investigate the effects of the injection nozzle specifications (e.g., sac volume, round shape at the inlet of the nozzle hole) and needle tip deviation on internal flow characteristics. The computational results revealed that the effects of the nozzle specifications and needle tip deviation with a smaller needle lift on internal flow characteristics and a general approach to optimize the injection nozzle specifications were obtained. 3 refs., 10 figs., 1 tab.

  20. 3D seismic survey in Honjo, Akita. Problems and struggles in acquisition and processing; Akitaken Honjo koku ni okeru sanjigen jishin tansa. Genba sagyo to data shori ni okeru mondaiten

    Imahori, S.; Kotera, Y.; Nakanishi, T. [Japan Energy Development Co. Ltd., Tokyo (Japan)


    Honjo mining area where investigations are conducted is hilly and has a complicated terrain with gas pipes buried in the ground just under the access road disabling the proper positioning of shock-generating large excavators or vibrators. Auger`s shallow hole shooting method is used in this survey to execute blastings at 639 points. In this method using charge depths of 4m, different from the conventional method using deeper charge depths (20-25m), surface waves prevail in the shot records giving rise to a new problem of removing them in the stage of data processing. The 2D filter that is a powerful tool in 2D data processing is not available in a 3D-survey where the tracing intervals are irregular in the shot records. In the effort of this time, a window length as a parameter in the direction of time is specified, and the F-X dip filtering method is employed in which any event that linearly continues beyond a certain number of traces in the said window is eliminated as a linear noise. It is recommended that the weighting function be changed in the direction of space since surface wave velocities are different at different locations. 1 fig., 1 tab.

  1. Three-dimensional modeling in the electromagnetic/magnetotelluric methods. Accuracy of various finite-element and finite difference methods; Denjiho MT ho ni okeru sanjigen modeling. Shushu no yugen yosoho to sabunho no seido

    Sasaki, Y. [Kyushu University, Fukuoka (Japan). Faculty of Engineering


    To enhance the reliability of electromagnetic/magnetotelluric (MT) survey, calculation results of finite-element methods (FEMs) and finite difference methods (FDMs) were compared. Accuracy of individual methods and convergence of repitition solution were examined. As a result of the investigation, it was found that appropriate accuracy can be obtained from the edge FEM and FDM for the example of vertical magnetic dipole, and that the best accuracy can be obtained from the FDM among four methods for the example of MT survey. It was revealed that the ICBCG (incomplete Cholesky bi-conjugate gradient) method is an excellent method as a solution method of simultaneous equations from the viewpoint of accuracy and calculation time. For the joint FEM, solutions of SOR method converged for both the examples. It was concluded that the cause of error is not due to the error of numerical calculation, but due to the consideration without discontinuity of electric field. The conditions of coefficient matrix increased with decreasing the frequency, which resulted in the unstable numerical calculation. It would be required to incorporate the constraint in a certain form. 4 refs., 12 figs.

  2. Three-dimensional computer simulation at vehicle collision using dynamic model. Application to various collision types; Rikigaku model ni yoru jidosha shototsuji no sanjigen kyodo simulation. Shushu no shototsu keitai eno tekiyo

    Abe, M.; Morisawa, M. [Musashi Institute of Technology, Tokyo (Japan); Sato, T. [Keio University, Tokyo (Japan); Kobayashi, K. [Molex-Japan Co. Ltd., Tokyo (Japan)


    The past study of safety at vehicle collision pays attention to phenomena within the short time from starting collision, and the behavior of rollover is studied separating from that at collision. Most simulations of traffic accident are two-dimensional simulations. Therefore, it is indispensable for vehicle design to the analyze three-dimensional and continuous behavior from crash till stopping. Accordingly, in this study, the three-dimensional behavior of two vehicles at collision was simulated by computer using dynamic models. Then, by comparison of the calculated results with real vehicles` collision test data, it was confirmed that dynamic model of this study was reliable. 10 refs., 6 figs., 3 tabs.

  3. Characteristics of the fluorescent substances in the Yodo River system by three-dimensional excitation emission matrix spectroscopy; Sanjigen reiki/keiko kodoho ni yoru yodogawa suikeichu no keiko busshitsu no tokucho

    Suzuki, Y.; Nakaguchi, Y.; Hiraki, K.; Kudo, M.; Kimura, M.; Nagao, S. [Japan Atomic Energy Research Inst., Tokyo (Japan)


    Organic substances in the river water in Yodo River system were analyzed by three-dimensional excitation emission matrix spectroscopy. Fluorescent substances were taken as an index of organic substances. The amount of fluorescent substances varied widely depending on the environment of river basin. It is suggested that the fluorescent substances are composed of organic substances which is not directly originated from biological activity. It is suggested that the fluorescent substances were produced by leaching of river bottom sediment. The fluorescent substances in Yodo River system consists of fulvic acid-like substances and protein. The analysis of fluorescent substances in river water by three-dimensional excitation emission matrix spectroscopy can be useful means for estimation of variation and origin of fluorescent substances. For better understanding of features of fluorescent substances in the surface water into which various kinds of substances enter, it is necessary to determine the exact sampling points based on the consideration of different sources and to make a database of peak positions for identification of fluorescent substances from fluorescence intensity peak. 29 refs., 3 figs., 2 tabs.

  4. Achievement report for fiscal 1998 on research and development of medical welfare device technologies. High-speed and three-dimensional X-ray CT system using a cone beam X-ray; 1998 nendo seika hokokusho. Kosoku cone beam sanjigen X sen CT



    In a 3-D CT scanner employing a large-field two-dimensional detector permitting wide-field scanning in a short time, basic discussions were given on the scanner to provide higher dynamic range, higher sampling rate and lower noise. Basic configuration of a total system for the detector was discussed, and the required idea for the two-dimensional detector was concluded. The direct conversion type detector is of a system capable of converting X-ray directly into electric charge. Since this system does not involve in optical conversion process, there is no scattered light. In addition, it has an advantage that electric charge can be fed to each pixel electrode by applying an electric field, minimizing cross talk between adjacent pixels. Detailed characteristics are under evaluation. In the indirect conversion type detector, conventional CT scanners employ scintillator/photodiode solid-state detectors. Although additional effort is required to read photodiode output signals by switching while maintaining high performance, this type of detector shows the greatest promise for use as a 3D-CT detector. It is, therefore, planned to focus our discussions on this detector. A prototype was constructed, and is under evaluation. The prototype employs a block structure, which suggests a possibility of producing even larger detectors. (NEDO)

  5. Achievement report for fiscal 1998 on research and development of medical welfare device technologies. High-speed and three-dimensional X-ray CT system using a cone beam X-ray (rationalized use of energy ); 1998 nendo seika hokokusho. Kosoku cone beam sanjigen X sen CT (enegy shiyo gorika)



    Discussions are given centering around rationalization of energy use in a 3-D CT scanner using a cone beam X-ray. For three-dimensional reconstruction in parallel, it was decided to employ the Feldkamp three-dimensional data reconstruction algorithm. In designing a parallel processing device to perform the three-dimensional reconstruction operation, specifications required for the device to be fabricated were discussed. Basic design was made on a personal computer based image processing device, and image display and processing were discussed. The direct conversion type two-dimensional detector is capable of converting X-ray directly into electric charge, and since it does not involve in optical conversion process, there is no scattered light. In addition, it has an advantage that electric charge can be led to pixel electrodes by applying an electric field, minimizing cross talk between adjacent pixels. Prototype production and evaluation are under way. Conventional CT scanners employ indirect conversion type two-dimensional detectors, or (scintillator/photodiode) solid-state detectors. Although additional effort is required to read photodiode output signals by switching while maintaining high performance, this type of detector has the highest possibility as the detector for a 3-D CT scanner, whereas this detector is being discussed as the No. 1 candidate. (NEDO)

  6. Achievement report for fiscal 1999 on research and development of technologies for medical welfare equipment. High-speed and three-dimensional X-ray CT system using a cone beam X-ray; 1999 nendo iryo fukushi kiki kenkyu kaihatsu seika hokokusho. Kosoku kon beam sanjigen x sen CT (energy shiyo gorika)



    Research and development is conducted of (1) a three dimensional data reconstruction system and (2) a three-dimensional image processing system. Under item (1), an experimental 3-dimensional image reconstruction unit is built. Its arithmetic performance is evaluated, and it is found that it will complete a 512{sup 3}-voxel reconstruction process in 5 minutes. An experimenting system which is a one-piece unit is built for evaluating apparatuses. Under item (2), a viewer is fabricated as an element basic to 3-dimensional image processing, which is to display 3-dimensional data in a 2-dimensional image. In addition, basic 3-dimensional image processing is enabled by adding to the viewer an image filter and a function of describing the cross section at an arbitrarily chosen angle. In the development of a total system, (1) a basic design is prepared for a data collecting device IC, (2) a sampling grate is designed, (3) basic designs are prepared for the gantry and the bed, and (4) an image quality assessment system is constructed. Under item (1), specifications are determined for the data collecting device IC, and a test piece is built. Under item (2), it is confirmed that the experimental data transmitter is capable of 622Mbps. Under item (3), preparation of a detailed design is stared. Under item (4), a simulation is conducted for the formation of a human body equivalent-phantom. (NEDO)

  7. Research and development of basic technologies for the next generation industries, 'three-dimensional circuit elements'. Evaluation on the research and development; Jisedai sangyo kiban gijutsu kenkyu kaihatsu 'sanjigen kairo soshi'. Kenkyu kaihatsu hyoka



    Research, development and evaluation were performed with an objective of establishing the basic technology related to three-dimensional circuit elements that integrate functions at ultra-high density. For the basic technology of lamination, the SOI technology suitable for the three-dimensional circuit elements was developed, and it has become possible to manufacture high-quality multi-layered crystalline structure by means of annealing that uses laser and electron beam. In addition, a lateral epitaxial technology for solid phase was developed, and the base to be applied to the three-dimensional circuit elements was established. Furthermore, the technology to put thin film circuits together would be useful for high-density integration in the future. The three-dimensional circuit makes parallel processing in each segment possible, whereas a possibility was shown that the processing can be performed at much higher speed than before. Actually a prototype three-dimensional circuit equipped with functions for parallel processing and judgment processing was fabricated. The image pre-processing which has been impossible on the real time basis in the conventional two-dimensional integrated circuit was realized in a speed as fast as milli-second order. These achievements lead to a belief that the targets for the present research and development have been achieved. (NEDO)

  8. Achievement report for fiscal 1998 on research and development project for regional consortiums. Regional consortium field (Development of super devices for medical treatment devices using three-dimensional micro processing technology (the second year)); 1998 nendo chiiki consortium bun'ya. Maikuro sanjigen kako gijutsu ni yoru iryo kikiyo super device no kaihatsu (dai 2 nendo)



    It is intended to develop super devices for medical treatment devices using a three-dimensional micro processing technology by developing and combining precision processing technologies accumulated in the Suwa area. Main targets were placed on device size reduction, and a high reliability portable chemical liquid sustaining injector. This paper describes achievements made in fiscal 1998. Micromotors currently used have as low output torque as 1/4 of the target. Enhancement of reduction gear mechanism efficiency and durability is the problem to be solved. Microtubes with an inner diameter of 0.1 mm were produced on a trial basis by using four kinds of materials. The delivery mechanism assured the targeted flow rate successfully by using the direct cum screw system, but reduction in driving torque is desired. Completion of the cartridge system is also in the realm of aim. Joints will be moved closer to commercialization by selecting materials taking into account the chemical resistance and disposition. Micro connectors and cables still have problems for development. The bubble sensor was virtually decided to be of optical type from the points of detection performance requirements. Detectors and peripheral devices will be reduced in dimensions, and their reliability will be enhanced. The flow rate sensor has a problem to be solved in responsiveness to intermittent flows. (NEDO)

  9. Three-dimensional backward tracing shceme for rolling process. I. ; Research on automatic optimum pass-schedule design for rolling processes. Atsuen kakoji no sanjigen sosei henkei no gyakko kaiseki shuho. I. ; Atsuen kako pass schedule no tekiogata sekkeiho ni kansuru kenkyu

    Yanagimoto, J. (The Universit of Tokyo, Tokyo (Japan). Institute of Industrial Science)


    The Institute of Production Technologies at the University of Tokyo has developed a numerically controlled rolling mill, CORMILL System, which is capable of giving a unified elucidation on the three-dimensional plastic deformation that develops on thin sheet, thick sheet, and profile materials in a rolling process. While the Institute has been giving discussions on its characteristics through applying various types of rolling process, this analytic system is also wanted to have such a function that enables directly a backward tracing. This research presents as the first step the basic conception on the backward tracing scheme on the sheet and profile material rolling as the object. The analytic method uses various rolling conditions including material cross section shapes at the entry side as the input variables for the three-dimensional analysis of an ordinary rolling process. Calculations provide as the output variables the material cross section shapes at the exit side, the distribution of speed, stress and strain of the materials at each position in the deformation region. The future research is intended to improve the functions of this backward tracing method while introducing evaluation criteria for the distribution of strains after rolling. 6 refs., 10 figs.

  10. Fiscal 1998 research report. R and D on the nanometer-controlled optical disk system / Magnetic domain- response 3-D optical memory technology (Development of rational use technology of energy); 1998 nendo nanometa seigyo hikari disk system no kenkyu kaihatsu seika hokokusho (jiku oto sanjigen hikari memory gijutsu). Energy shiyo gorika gijutsu kaihatsu



    This report describes the fiscal 1998 result on the magnetic domain-response 3-D optical memory of the nanometer-controlled optical disk system. The magnetic domain response technology is a next-generation optical disk technology which copies fine bits recorded on a recording layer on a read-out layer while magnifying them, and detects the bit smaller than a read out optical spot as large signal level. Magnetic domain-response read out of a fine magnetic domain of 0.12{mu}m in mark length and 0.60{mu}m in track width recorded by optical pulse magnetic field modulation was attempted under the conditions of conventional wavelength (around 680nm) and NA (0.55), and succeeded in expanding unobservable signals up to saturated amplitudes. This is equivalent to a 2-D recording density of 10Gbit/in{sup 2}. Crosstalk-free read out was also verified. As for R and D on the magnetic circular polarization enhanced multiple read out system, the 2-wavelength read out system was fabricated by using 515nm Ar laser light and 780nm semiconductor laser light. It was verified in 2- wavelength read out test that the multi-wavelength read out system is reasonable theoretically. (NEDO)

  11. Report of the results of the fiscal 1997 regional consortium R and D project. Regional consortium field / Development of medical equipment use super devices using micro-3D processing technology (first fiscal year); 1997 nendo chiiki consortium kenkyu kaihatsu jigyo. Chiiki consortium bun`ya / micro sanjigen kako gijutsu ni yoru iryo kikiyo super device no kaihatsu (daiichi nendo) seika hokokusho



    The R and D are conducted of medical equipment use super devices using technical seeds of Mechanical Engineering Laboratory and micro-3D processing technology which was developed from precision processing technology, etc. which is integrated in the Suwa area, Nagano prefecture. For it, the following R and D are carried out: 1) development of micromechanism: DC3V driven micromotor, chemical use microtube with diameter of 0.1mm, micro-delivery mechanism of chemicals, misting mechanism of chemicals, microjoint, microconnector and cable, and microfilter. 2) development of microsensor: small size/non-contact, microflow of chemicals, and sensor to detect emission of bubble. 3) development of control system. In fiscal 1997, in 1), each element was trially made to clarify subjects. In 2), it was made clear that as flow sensor, ultrasonic type, electromagnetic type and thermal mass flow type are viable, and as bubble sensor, optical sensor is viable. In 3), the following were conducted: information collection of contactless charging circuit, and trial fabrication of liquid crystal polymer ultra thin casing. 9 refs., 84 figs., 30 tabs.

  12. Ionization current in N2 gas. 11. Three dimensional analysis for loss processes of metastable particles affected by the reflection at the boundary; N2 gas chu ni okeru denri denryu. 11. Kyokai deno hansha wo koryoshita jun`antei reiki ryushi sonshitsu katei no sanjigen kaiseki

    Suzuki, S.; Ito, H.; Sekizawa, H.; Ikuta, N. [Chiba Institute of Technology, Chiba (Japan)


    Loss processes of the nitrogen metastable molecule N2(A{sup 3}{Sigma}u{sup +}) in plane parallel electrodes have been investigated by us previously by solving the diffusion equation. Our procedure is based on an analysis using the third kind of boundary condition which can take account of finite values for the density of N2(A{sup 3}{Sigma}u{sup +}) at the electrode surfaces. The values of the effective lifetime of N2(A{sup 3}{Sigma}u{sup +}) calculated from this analysis were reasonably consistent with our experiments. This paper describes the behavior of the effective lifetimes of N2(A{sup 3}{Sigma}u{sup +}) in a cylindrical cavity. The analytical treatment of the diffusion equation for N2(A{sup 3}{Sigma}u{sup +}) proposed by us is extended to the three dimensional space. We report the nature of the effective lifetimes of metastable molecule in the cylindrical cavity systematically. 16 refs., 9 figs.

  13. Achievement report for fiscal 1998 on research and development project for regional consortiums. Regional consortium field (Development of a three-dimensional high-speed bio-micromanipulation system (the second year)); 1998 nendo chiiki consortium bun'ya. Sanjigen kosoku bio micro manipuration system no kaihatsu (dai 2 nendo)



    Research and development are made on a bio-micromanipulation system that can substitute human being to perform three-dimensionally selective, large-quantity, repeated, high-speed and high-accuracy processing in micro and nano zones in bio-technologies. Fiscal 1998 has incorporated different component technologies into the common platform structured in last year to structure a high-speed laser manipulator separating device and a three-dimensional micromanipulation device and to perform basic experiments. The structure can sort out arbitrarily only the selected species from a large quantity of microorganisms dispersed in aqueous solution, and separate them at a high speed. Intended objects are trapped by laser beam, and substances other than those intended are removed from the electric field. Then, the trapped objects are moved by laser beam and recovered. This operation can be performed even at DNA level. A positioning and fixing device for cell anatomy was manufactured on a trial basis. In addition, a three-dimensional micromanipulation device was structured, and basic experiments were carried out on force measurement and control. A micro flow path forming technology was established by using a micro processing technology. This paper also describes a commercialization survey. (NEDO)

  14. Fiscal 1996 report on the comprehensive invetigational research on medical instruments. Development of a trace collection/microanalysis system of blood, etc.; development of a high accuracy three dimensional image diagnosis system; development of a low invasion operation supporting system; development of artificial internal organ technology; 1996 nendo chosa hokokusho sogo chosa kenkyu (iryo kiki). Ketsuekinado biryo saishu/biryo bunseki system kaihatsu, koseido sanjigen gazo shindan system kaihatsu, teishinshu shujutsu shien system kaihatsu, jinko zoki gijutsu sogo kaihatsu



    In accordance with the rapidly advancing phenomena of decreasing in number of child and aging in Japan, enhancement in quality of medical care and welfare is an issue to be urgently considered, and importance of the support by technology of medical instruments is increasing. The purpose of this research is to extract subjects of the element technology, which will be important strategically and in the long run, from two viewpoints of the needs side and seeds side to study the course of the development of medical instruments. For this, questionnaires were sent out to learned persons in charge of work connected with medical care to grasp the needs for the future development of medical instruments. Based on them, the paper extracted subjects of the element technology which are considered to become strategically important in Japan. The report outlined the investigational research and arranged the methods and results of the survey of the needs for the development of medical instruments. Next, the paper described the method to extract important subjects of the element technology from the needs survey, and then arranged important subjects of the element technology extracted through the study in the committee. At last, the paper generalized the investigational research and summarized the remaining subjects, etc. at the same time. 11 tabs.

  15. Fiscal 1998 survey report. Medical equipment (Development of fine sampling/analysis system for blood / Development of high-precision 3-D image diagnosis system / Development of low-invasion operation support system / Total development of artificial internal organ technologies); 1998 nendo chosa hokokusho. Iryo kiki (ketsuekinado biryo saishu, biryo bunseki system kaihatsu/koseido sanjigen eizo shindan system kaihatsu/teishinshu shujutsu shien system kaihatsu/jinko zoki gijutsu sogo kaihatsu)



    For efficient medical care supply systems, the R and D of advanced medical care technology and equipment largely contribute to productivity improvement for medical care services. Among them, a progress of medical care technology is becoming important for preparation of efficient and fair supply systems. MITI thus established 'Medical care and welfare equipment development project' in 1994, and has promoted the strategic long-term R and D project of medical care and welfare equipment as joint R and D project of NEDO and private enterprises. In fiscal 1998, on the development of the fine sampling/analysis system for blood, the high- precision 3-D image diagnosis system, the low-invasion operation support system, and the artificial internal organ technologies since fiscal 1996, this project clarified essential technical issues based on the future view, selected some themes to be newly developed in the future, and surveyed and evaluated the details of their R and D concretely. (NEDO)