A method for distribution control of aerial ultrasound radiation pressure for remote vibrotactile display

摘要

We propose a calculation method for phase and amplitude of ultrasound transducers in arrays, which are supposed to generate proper spatial distribution of radiation pressure on users' skin corresponding to vibrotactile sensation conveyed to users. The phased array technique has been applied for ultrasound transducer array and converged energy in a focus of magnified amplitude in the air has been successfully generated as well as vibrotactile stimulation in a point. In this paper we expand that phasing scheme for a single focus to arbitrary three-dimensional distribution amplitude with transducers located in three-dimensional disposition. We verify the validity of our method with numerical experiments.