AN ELECTROMAGNETIC TRANSDUCER FOR GENERATION AND DETECTION OF BOTH LONGITUDINAL AND TRANSVERSE ULTRASONIC WAVES

摘要

An electromagnetic ultrasonic transducer that generates and detects both longitudinal waves and radially polarized transverse waves was made and tested on aluminum, brass, copper, and mild steel. The transducer detected an artificial flaw in aluminum with a fairly good signal-to-noise ratio. It was also shown experimentally with the electromagnetic transducer that the mode conversion between a longitudinal wave and a radially polarized transverse wave occurs with a fairly good efficiency at the vertical reflection.