Patent ID: 9714924
Date: 2017-07-25
CPC Classifications: G01N

Claim:
1. An ultrasonic inspection device comprising: a vibration generating section that irradiates laser beam onto a first member to generate ultrasonic vibration; a detecting section that detects the ultrasonic vibration propagated from the first member to a second member via a welded portion, the second member and the first member being overlapped; and an analyzing section that analyzes the propagated ultrasonic vibration detected by the detecting section, the analyzing section obtaining at least one of frequency and wavelength of the ultrasonic vibration detected by the detecting section upon when a displacement of the second member in a thickness direction becomes maximum, and the analyzing section obtaining a cross sectional dimension of the welded portion from a correlated relationship of the cross sectional dimension of the welded portion obtained in advance at a position on a surface of the second member on the first member side and the at least one of the frequency and wavelength of the ultrasonic vibration.