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TAKASHI SUZUKI,SHIGENOBU SHINOHARA,HIROFUMI YOSHIDA,HIROAKI IKEDA,YASUHIRO SAITOH,KEN-ICHI NISHIDE,MASAO SUMI 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
An infrared range finder using a self-mixing laser diode (SM-LD), which has been proposed and developed by the authors, can measure not only a range of a moving target but its velocity simultaneously. In this paper, described is that the precise mode-hop pulse train can be obtained by employing a new signal processing circuit even when the backscattered light returning into the SM-LD is much more weaker. As a result, the distance to a tilted square sheet made from aluminium or white paper, which is placed 10 ㎝ through 60 ㎝ from the SM-LD, is measured with accuracy of a few percent even when the tilting angle is less than 75 degrees or 85 degrees, respectively.<br/> And in this paper, described is the range-image recognition of a plane object under the condition of standstill. The output laser beam is scanned by scanning two plane mirrors equipped with each stepping motor. And we succeeded in the acquisition of the range-image of a plane object in a few tens of seconds. Furthermore, described is a feasibility study about the range-image recognition of a slowly moving plane object.
KEN-ICHI TADA,SHIGENOBU SHINOHARA,HIROFUMI YOSHIDA,HIROAKI IKEDA,YASUHIRO SAITOH,KEN-ICHI NISHIDE,MASAO SUMI 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
The measurable speed range of the self-mixing type semiconductor laser range finder has been greatly improved by employing a new processing circuit. Using this range finder as an external finder of a single lens reflex (SLR) autofocus (AF) camera, some clear photographs of an object moving at a medium speed of 20 ㎜/s is obtained.
관입형 텐서그리티 구조시스템의 개발 및 공간구축을 위한 구조특성 분석
이주나,미야사토 나오야,사이토 마사오,Lee, Juna,Miyasato, Naoya,Saitoh, Masao 한국공간구조학회 2014 한국공간구조학회지 Vol.14 No.4
In this study, Intersecting Tensegrity System that is integrated solid compression members with tension members was presented. This system is set up by connecting upper and lower compression members of pyramid shape with exterior tension members. In this system, the solid compression members are intersected each other and connected by a tension member in the center. This system is a variation of Tensegrity system, has a improved feature that the system is able to induce prestresses in all of tension members easily by adjusting the distance of a tension member in the center. The proposed system was studied by modeling, and the structural behavior of the system was investigated by mechanical analysis of the model. Furthermore, the features of the structural behavior variations was investigated when the composition elements(total height, size of surface, intersection length, etc.) are changed variously. It was also showed that the system is able to be used as a temporary space structure system with a membrane roof of inverse conical shape.