レーザを用いたパーソナルコンピュータ制御微圧力計 : 第3報, フロートを除いた場合の検討

概要

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This paper describes an automatic liquid manometer that operates on the basis of a position-detecting system under fuzzy control. A slanting laser beam is directed to the meniscus of liquid in a glass tube manometer without a float and is reflected by the meniscus. We can see a spot of light on the back of a screen which is put on the outer side of the glass tube. Since this spot of light is focused on a position sensitive detector (PSD) through a lens, the position of the meniscus is detected. The application of external pressure to the manometer causes the position of the meniscus to change. The fuzzy controller moves the meniscus back into position by lifting a reservoir connected to the glass tube. The vertical displacement of the reservoir required to return the meniscus to its original position is equal to the pressure head that is applied to the manometer. The system has been tested experimentally with good results.
社団法人日本機械学会の論文
1998-08-25