SIGNAL PROCESSING METHOD AND DEVICE FOR ULTRASONIC TESTING AND THICKNESS-MEASURING METHOD AND DEVICE

摘要

This signal processing method for ultrasonic testing comprises: a step in which a plurality of burst wave signals that have different frequencies are used to drive an ultrasonic probe and generate ultrasonic waves, and a test subject is irradiated with the ultrasonic waves; a step in which a plurality of reflected waves corresponding respectively to the plurality of burst wave signals with which the test subject was irradiated are received; a step in which a detection process is performed on each of the received signals of the plurality of the reflected waves corresponding respectively to the plurality of burst wave signals, and a plurality of detection signals are obtained; and a step in which the plurality of detection signals are used to generate testing signals for obtaining test results pertaining to the test subject.