F-1320 ヒトのせん断力知覚の閾値と静止摩擦係数の関係(S50-2 生物医学工学における計測と制御(2))(S50 生物医学工学における計測と制御)

概要

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In order to elucidate mechanism of human capability to recognize shearing stress arising on finger surface, an experimental apparatus was developed by comprising of a x-table driven by a DC motor, a force-moment sensor, a probe mounted on the x-table through the force-moment sensor. In experiments, human subjects grasped the probe and felt shearing force arising on their fingers because the probe was drawn by down motion of the x-table. Procedure of psycophysical experiment obtaining threshold of slippage force was programmed in the computer according to PEST (Parameter Estimation Sequential Testing). As the result of the experiment, threshold for smooth surface of acrylic increased by 20 % comparing with surface including roughness such as polishing papers distributed 12 and 30 μm particles of aluminum oxide. Static coefficients of friction of polishing papers were almost constant against variation in shearing force, while static coefficient of friction of acrylic plate was the highest in the range of 2-3.5 N and was the smallest in the range of 3.5-5 N. Consequently, the threshold of shearing force does not depend on the static coefficient of friction and it was seemed that the sensitivity of shearing force became higher in the transition from static to dynamic friction.
一般社団法人日本機械学会の論文
2001-08-22