| 摘要 |
PROBLEM TO BE SOLVED: To obtain an angle beam method in which reflected echoes in both parts of a flaw can be detected easily on a screen, in which the kind and the size of the flaw can be evaluated simply on the screen, in which the depth and the size of the flaw can be computed automatically and in which the burden of an inspection operator is reduced. SOLUTION: In an angle beam method, an ultrasonic probe is moved on the surface of an object to be inspected, respective echoes in both end parts of a flaw inside the object to be inspected are detected, their peak hold waveform is displayed on a display screen 21a, and the size of the flaw is evaluated. In the angle beam method, a peak hold waveform 62 about a first end part which is detected first and a peak hold waveform 64 about a second end part which is detected later are displayed so as to be visually confirmed on the display screen 21a. |
