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길이 測定 및 位置決定을 위한 電子管回路製作에 관한 硏究
이종록 梨花女子大學校 韓國生活科學硏究院 1975 韓國生活科學硏究院 論叢 Vol.14 No.-
When A accurated measurement of Length and Positioning was carried out with a testing apparatus making use of Moire´ light, it is necessary to use a apparatus of Electronic tube circuit. In this paper, the Design and Manufacture of one Electronic tube circuit for this purpose has been included. Electronic circuits are made up of the coarse scale circuit system for wave shaping from coarse scale detector and fine scale circuit system for amplifying signals from fine scale detector. Included in the coarse scale circuit system are two step cathode follower circuit, three step A.C amplifier circuit, two step rectifier circuit, two step low pass filter circuit, a Differential amplifier circuit, a Differentiating circuit, a monostable multivibrator circuit, and included in the fine scale circuit system are two step cathode follower circuit, two step A.C amplifier circuit, a low pass filter circuit and a cathode input amplifier circuit. The result of the experiment and analysis showed that low SN ratio and low input voltage get bigger in all coarse, fine scale circuit systems.
Photodiode를 利用한 길이의 精密測定에 관한 硏究
이종록,李起榮 梨花女子大學校 韓國生活科學硏究院 1979 韓國生活科學硏究院 論叢 Vol.23 No.-
본 연구는 Photodiode를 이용하여 국내에서 시판하고 있는 plastic자의 눈금 사이 간격을 광학적으로 흑정하는 한 방법을 제시하셨다. 실험은 silicon photodiode(S7002)와 초완등속장치, level meter, amplifier 등을 이용하였고, verier calliper를 nega-film에 복사한 것과 6개 plastic자를 초완등속장치로 이동시켜 1mm사이의 지나간 시간을 6단 digital counter로 측정하면서 recirder로 recording하였다. 측정 결과 상대오차가 0.4~2.8%까지 나와 눈금 사이 간격이 부정확함을 알 수 있었고, photodiode는 길이의 정밀측정에 유용하게 이용될 수 있음을 알았다. Our invetigation has focussed on determining accuracy of plastic ruler produced in Korea, by optically measuring the spaces between the scales through the use of photodiodes. This experiment was performed with a superlow speed feeder, photodetector for light signal, level meter, amplifier, digital counter, recorder, etc. In this expeperiment nega film duplicated vernier calliper and 6 plastic rulers were moved with a superlow speed feeder, and the processing time in passing 1mm was measured by a six-gear digital counter (manufactured by Sentinel Electronics, Inc) and was recorded with a recorder. The result of this experiment are as follows : 1) The corverage of relative error of each space between the scales on the ruler in order of calliper, A,B,C,D,E,F was 0.4~0.9%, 1.3~1.8%, 1.5~1.8%, 1.4~1.8%, 1.3~1.8%, 1.3~1.9%, 1.2~2.1%, 1.3~2.1%. 2)It was also found that the coverage of relative error measured with the recorder was 0.5~0.8%, 0.8~4.6%, 1.5~2.5&, 0.8~3.1%, 1.2~3.5%, 1.7~2.8%, 1.5~4.0%. 3)We have thus conclueded that a photodiode can be used for the accurte measurement of length.