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Volume 122, Issue 9
Displaying 1-5 of 5 articles from this issue
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Paper
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Shin-ichirou Tezuka, Satoshi Kato, Hitoshi Hamanaka, Tetsuya Watanabe, ...Article type: Others
Subject area: Others
2002 Volume 122 Issue 9 Pages 427-432
Published: 2002
Released on J-STAGE: March 28, 2003
JOURNAL FREE ACCESSThis paper discusses a method of analyzing the adhesion problem of arbitrary-shaped microstructures using FEM and an optimization. We have applied our method to square plates, and obtained realistic curved adhesion shapes. We fabricated square plates as test samples, and calculated γs of these samples by using our method. Adhesion criteria are also derived by numerical calculation. We then redesigned the adhesion samples by applying this method, and subsequent tests showed no adhesion of the samples.View full abstractDownload PDF (1264K) -
Hiromi Ohno, Masao SaitoArticle type: Others
Subject area: Others
2002 Volume 122 Issue 9 Pages 433-439
Published: 2002
Released on J-STAGE: March 28, 2003
JOURNAL FREE ACCESSThe echograph by ultrasound is widely utilized. Because of the complex structure inside of the body, however, the image is affected. Usually, it is assumed that the transmitted pulse progresses without phase distortion, and only the amplitude decay is compensated in imaging. The estimation of the internal structure by reflected ultrasound is formulated as a problem, where the reflected wave from the transmitted pulse is observed on the body surface, based on which the characteristic impedance of the cascade structure is to be estimated. When there is an attenuation, however, this problem is improperly-posed and the solution is not unique. This paper examines to what extent the solution obtained by the conventional method deviates from the actual structure, considering the phase distortion of the waveform.View full abstractDownload PDF (759K) -
Masatoshi Kanamaru, Ryuji Kohno, Yoshishige Endo, Atsushi HosoganeArticle type: Others
Subject area: Others
2002 Volume 122 Issue 9 Pages 440-446
Published: 2002
Released on J-STAGE: March 28, 2003
JOURNAL FREE ACCESSA new type of micro-probe substrate is designed and fabricated for semiconductor chips that has high-density and fine-pitch electrode pads made by micro-machining. The probe substrate consists of an array of micro-probes 25μm high, on beams formed individually with a pitch of 110μm. It is fabricated by a micro-machining process using anisotropic silicon etching and multi-layer mask techniques.View full abstractDownload PDF (1524K) -
Shigeki Ogawa, Hiroki KuwanoArticle type: Others
Subject area: Others
2002 Volume 122 Issue 9 Pages 447-451
Published: 2002
Released on J-STAGE: March 28, 2003
JOURNAL FREE ACCESSMethods to remotely monitor and check underground fuel tanks are strongly needed from the viewpoint of environmental protection. This paper presents our temperature-compensated ultrasonic liquid-level meter. By connecting the meter to a telecommunications network, the liquid level in a remotely located tank can be continuously monitored. In our ultrasonic liquid-level meter, we use a reflection ring at the reference position to compensate for measurement error caused by changes of atmospheric temperature. The maximum measurement error is within ±5mm from −10°C to +20°C at a measurement distance of 2000mm. With regard to long-range measurement accuracy, the maximum error has remained within ±2mm over 1.5 years at a measurement distance of 2200mm. In this paper, the structure of the meter, the reflection ring, the configuration of the detection circuit, the superposed signal of transmission and reception, and experimental results are shown.View full abstractDownload PDF (1073K)
Letter
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Yasuhiro OGOSHI, Sakiko OGOSHI, Sadaki HIROSE, Haruhiko KIMURAArticle type: Others
Subject area: Others
2002 Volume 122 Issue 9 Pages 452-453
Published: 2002
Released on J-STAGE: March 28, 2003
JOURNAL FREE ACCESSRecently, the number of the aged person who leads a solitary life is increasing, and unexpected accidents in a residence have been increasing rapidly. Therefore, understanding of their activities in their residences will be very important to avoid accidents and to take care of them. In this paper, the new method to set up a sensor of which signals are transferred to the computer in the room and to analyze their activities using the new method is described.View full abstractDownload PDF (155K)
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