Ultrasonic flaw detection sensor and ultrasonic flaw detection method

摘要

The transmission sensor 1T and the reception sensor 1R are disposed so as to sandwich a testing target 301 therebetween. The reception sensor 1R receives a false signal arising from a GL generated upon ML scanning by a scanning angle equal to or greater than a minimum scanning angle ¦min but equal to or smaller than a maximum scanning angle ¦max.