Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 06, 2023 - March 07, 2023
Tactile illusion is a phenomenon that a stimulus is perceived different from the original physical phenomenon. Various tactile illusions have been confirmed to occur under specific stimulus conditions. Soft-feel grain is the surface that induce illusion which an object's surface changes hardness. In this study, we investigated the effect of surface roughness on the perception of hardness and its factors. In the experiment, tactile samples with the same hardness and different surface properties were used for sensory evaluation of hardness during stroking. During sensory evaluation, the contact state and fingertip characteristics were measured. And we discussed the relationship between the change in hardness. As a result, it was considered that the frictional force between the fingertip and the sample decreased the fingertip speed and subjects felt the sample was non-slip. This feeling of non-slip may cause the sample to feel harder.
