Patent ID: 6588278
Filing Date: 2003-07-08
Classification: G01N,G10K

Abstract:
An ultrasonic inspection device provided with an ultrasonic scanning unit for scanning a surface of a specimen with an ultrasonic wave through a medium for the ultrasonic wave, a drive unit for said ultrasonic scanning unit, and a computing unit for controlling said ultrasonic scanning unit via said drive unit and performing a flaw detection of a surface layer of said specimen, comprising:an ultrasonic probe, an oscillator, and an acoustic lens having propagation paths for a vertical incident wave and an angled incident wave to said specimen and propagation paths for a vertical reflection wave and a leaked wave from said specimen such that a propagating speed of an ultrasonic wave along said propagation path for said vertical incident wave and said propagation path for said vertical reflection wave and a propagating speed of an ultrasonic wave along said propagation path for said angled incident wave and said propagation path for said leaked wave differ from each other, said ultrasonic probe being arranged in said ultrasonic scanning unit to perform transmission of an angled incident wave, which induces a leaked elastic surface wave, to said specimen and reception of a leaked wave from said specimen, whereby soundness of said surface layer of said specimen is evaluated at said computing unit from a level of said leaked wave received by said ultrasonic probe.