球面配置型空中超音波触覚ディスプレイの曲率変化による空中触覚提示

抄録

In haptic feedback using focused ultrasound, a technique has been proposed that involves creating an ultrasound focal point using a spherical surface without the need for phase control. This method is efficient as each transducer faces directly toward the focal point, but it has a limitation – the focal point remains fixed due to the ultrasonic transducers being attached to a static sphere. This study introduces a method to move the focus in the depth direction by dynamically changing the curvature of the spherical surface to which the transducers are attached. We built a device that can adjust curvature using a servo motor, confirming its capability to relocate the focus position. The study also investigates the softness presentation using the created device.