Ultrasonic inspection apparatus and method

Abstract

An ultrasonic inspection apparatus includes a control devicethat outputs a pulse signal for making an ultrasonic probeA transmit an ultrasonic wave to the ultrasonic probeA and that is supplied with a waveform signal obtained by converting the received ultrasonic wave from an ultrasonic probeB, and that computes a thickness reduction depth of a pipebetween the ultrasonic probeA and the ultrasonic probeB. The control devicecomputes the thickness reduction depth of the pipeby selectively using a reception time of the ultrasonic wave transmitted from the ultrasonic probeA, reflected once by an inner surfaceof the pipe, and received by the ultrasonic probeB, and a reception time of the ultrasonic wave transmitted from the ultrasonic probeA, reflected twice by the inner surfaceof the pipe, and received by the ultrasonic probeB.