Reproduction of Grasping Sensation by High-resolution Suction Tactile Display for Finger Pads

This study aims to reproduce the grasping sensation with a high-resolution suction tactile display. We need a method to generate a suction pressure stimulus based on the strain energy distribution obtained by finite element simulation. In this paper, we aim to obtain information for investigating this method by determining the two-point discrimination threshold of the suction pressure stimulus. The two-point discrimination threshold was obtained by varying the sensation and pressure of the suction holes. The experimental results showed that the two-point discrimination threshold changed depending on the distance between the suction holes and the suction pressure. It was also found that the discrimination threshold was smaller with four holes than with two holes. The results will be used as a guideline for seeking a distributed suction pressure control method based on the strain energy distribution.