低周波側に拡張された測定範囲を持つ回転振動変位計

概要

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A seismic sensor capable of measuring lower-frequency angular displacement was constructed. Measurements of yawing motion and unevenness of rotation in the motion of machine work tables and the like, are intended to be the main use. This sensor has functions of compensation of dynamic characteristics and a displacement feedback to broaden measuring range, which were realized by an operational amplifier circuit and a mechanism utilizing a piezo-actuator. According to calibration tests, the sensor has flat gain characteristics down to about 1 Hz in spite of the natural frequency of 7 Hz and the damping ratio of 0.06 and good linearity in the angular amplitude less than 20". It is also fairly insensitive to tilting and transverse shaking. A measurement of yawing motion of a table of a milling machine was successfully made.
一般社団法人日本機械学会の論文
1990-04-25