A Study on Tactile Resolution of Human Skin

Abstract

In a previous paper, we proposed a hypothesis on human tactile resolution that is “if we control appropriate two degree-of-freedom stimuli with intervals of a half of TPDT, we can produce any touch sensation that can be generated by normal stress distributions.” However, since the apparatus was insufficient, the hypothesis was not examined clearly. The main reason of the insufficiency was that the stimulator was based on displacement control. Then if a subject’s hand moved slightly on the apparatus, unexpected and not negligible stimulus arose. In this paper, we fabricated a new tactile stimulator based on pressure control. And we obtained experimental results that support the hypothesis.