Dummy finger for surface acoustic wave tactile display -vibration characteristics-

We have already proposed a novel method to provide human tactile sensation using surface acoustic wave (SAW). A pulse modulated driving voltage excites temporal distribution of standing SAW. The distribution generates friction shift on the surface of a SAW substrate. When the surface with burst SAW is explored, the friction shift can be perceived as tactile sensation at mechanoreceptors in the finger skin. For real reproduction of tactile sensation, the burst frequency was controlled according to measured rubbing motion. To enhance the reality, we should discuss the control parameters and their arrangement. For the arrangement, vibration characteristics of fingers on the display are required. To observe the characteristics, a dummy finger is proposed. In this paper, fabrication of the dummy finger and its characteristics are reported. The discussion according to the result is also described.