Ultrasonic testing sensor and ultrasonic testing 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 Φmin but equal to or smaller than a maximum scanning angle Φmax.

主权项

1. An ultrasonic testing method, comprising the steps of:
calculating a generation angle Δφ of a grating lobe; evaluating, on the basis of a shape of a testing target and positions of a transmission sensor and a reception sensor with respect to the testing target, whether there exists a reflection source in a grating lobe generation direction; measuring a reception position of a reflected wave by the reception sensor; and comparing the reception position of the grating lobe based on the calculated generation angle Δφ and the measured reception position of the reflected wave with each other to evaluate whether the reflected wave is a reflected wave of the grating lobe.