Acoustic Distance Measurement Based on Phase Interference Between Direct and Reflected Ultrasonic Waves (Estimation for Close Range Using Single Transducer)

Abstract

Ultrasonic waves were very often used to measure the distance to a target. Authors proposed a distance measurement method based on phase interference between the transmitted and reflected audible sounds. This paper describes a new trail on the distance measurement using ultrasonic waves for close range by using a single transducer.