Single-Pulse Ultrasonic Proximal Distance Sensor with Thermoacoustic Transmitter

Abstract

This paper proposes an ultrasonic proximal distance sensor, which uses a thermoacoustic device as a transmitter. Thermoacoustic transmitter doesn't have mechanical vibration and resonant frequency, thus it can emit a single-pulse ultrasonic, which width is under 10 µsec. Using a single-pulse ultrasonic, overlap of transmitting and receiving term is very short and it can measure very short rage such as 3 mm with excellent accuracy.