Apparatus and method for sending out and receiving ultrasonic signals.

摘要

An ultrasonic inspection apparatus and method in which an array of acoustic transducers (9) having transmitters and receivers are disposed adjacent to a workpiece (10), and alternating potential source (2) is connected to some of the acoustic transmitters to project a side lobe of an acoustic wave toward a specific zone (11) of the workpiece (10). There­after, the connections between some of the acoustic trans­mitters and the potential source (2) are automatically changed to move the specific zone as many times as may be necessary to provide scanning of the workpiece (10).