Ultrasonic flaw detector, ultrasonic sensor support device, and ultrasonic flaw detector method

摘要

PROBLEM TO BE SOLVED: To provide an ultrasonic test device, an ultrasonic sensor support device and an ultrasonic test method capable of executing an ultrasonic test regardless of a structure of a welding area.SOLUTION: An ultrasonic test device comprises: a pair of ultrasonic sensors 11 which transmit and receive ultrasonic beams; and a support device 10. The support device 10 has: an installation mechanism 15 attached to piping 2; a holding mechanism 25 which is connected to the installation mechanism 15 and holds the pair of ultrasonic sensors 11 in a manner that keeps a constant distance between oscillation surfaces 12 of respective ultrasonic sensors 11 and a bottom surface of a furnace 3a; a rotation mechanism 29 which rotates the installation mechanism 15 around the piping 2; and a controller 30 which controls the installation mechanism 15, the holding mechanism 25 as well as the rotation mechanism 29. The controller 30 controls the installation mechanism 15 so that the pair of ultrasonic sensors 11 are positioned at a predetermined distance from the piping 2.