Computer-controlled system for measuring two-dimensional acoustic velocity fields

Abstract
An automatic system is described for measuring two-dimensional acoustic velocity fields in solid samples. The measurement is performed by a computer-controlled, mechanically-scanned transducer in a liquid bath and is based on measuring the phase delay of the acoustic wave by a two-pulse echo method. Applications include measuring stress fields due both to externally-applied and residual stresses, and microstructure studies of solid samples.