Noncontact measurement of vibration using airborne ultrasound

Abstract

A noncontact ultrasonic method for measuring the surface normal vibration of objects was studied. The instrument consists of a pair of 420 kHz ultrasonic air transducers. One is used to emit ultrasounds toward the moving surface, and the other receives the ultrasound reflected from the object under test. Two effects induce a phase modulation on the received… (More)
DOI: 10.1109/58.677607

12 Figures and Tables

Topics

  • Presentations referencing similar topics