Why does human finger stactile sense have the directionality in sensing fine steps ? Its mechanism is elucidated.

本研究旨在阐明人类手指触觉识别表面粗糙度和光滑度的机制。在前人的工作中，手指的触觉能力是在手指触摸和辨别大约10μm的精细步长时确定的。在这项研究中，开发了一种细步呈现系统，可以测量人类手指触摸细步时的压缩力。在实验中，受试者以30 mm/S的速度触摸20、50、100μm往复运动的精细台阶，并测量其压缩力。在以后的工作中，我会考虑如何对实验中测得的数据进行分析。

The aim of this study is to elucidate the mechanism of human finger’s tactile sense for recognizing surface roughness and smoothness. In the previous works, the capability of human finger’s tactile sense was determined when the finger touched and discriminated about 10 μm fine steps. In this study, a fine-step presentation system was developed that can measure the compression force of the human finger touching a fine step. In the experiment, a human subject touched the fine steps of 20, 50, 100 μm moving reciprocatively at the velocity of 30 mm/s, and the amounts of the compression force were measured. In future work, I will consider how to analyze the data measured in the experiment.