2A2-B04 Visualization of Pressure Distribution of Airborne Ultrasound Tactile Display Utilizing Viscous Fluid(Tactile and Force Sensing (2))

Abstract

In the process of developing our ultrasound-based non-contact tactile display, it is needed to check whether the ultrasound is focused as intended. It takes a lot of time to scan a microphone, feeling tactile stimulation by hand lacks spatial resolution, and other conventional visualization methods are not available in our case. This paper proposes a visualization method using viscous fluid. The viscous fluid functions as a low pass filter and eliminates undesired components such as splashes, bubbles, and traveling waves. Then it shows the spatial distribution of the DC component, i.e. acoustic radiation pressure, which is the origin of the tactile stimulation of our tactile display.