ULTRASONIC INSPECTION METHOD AND ULTRASONIC INSPECTION APPARATUS FOR SPOT-WELDED SECTION, AND ANGLE ADJUSTMENT METHOD AND POSITION ADJUSTMENT METHOD FOR INSPECTION PROBE

摘要

PPROBLEM TO BE SOLVED: To measure the diameter of a nugget to be measured, by using only a single inspection probe. PSOLUTION: A vibrator group 10 is configured as an ultrasonic transducer, wherein a plurality of vibrators 11-14, each being capable of independently transmitting/receiving ultrasonic waves are arranged concentrically. Ultrasonic waves are transmitted from the plurality of vibrators 11-14 toward a spot-welded section, while their transmission timings are shifted. The diameter of the nugget 33 in the spot-welded section is estimated, based on the reception state of reflection echoes of the transmitted ultrasonic waves. PCOPYRIGHT: (C)2008,JPO&INPIT