| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic flaw detector for easily adjusting a position in which a depth and a size of a crack are measured. SOLUTION: The ultrasonic flaw detector comprises a transmitting oscillator 1 for transmitting incident ultrasonic waves to an object 20, a receiving oscillator 2 for receiving the ultrasonic waves diffracted by the crack 19 in the object 20, wheels 3, 4, and a support member. The wheels 3, 4 are attached to the support member so as to maintain a regular interval, roll above the object 20 in parallel and position rotational shafts 3a, 4a separated in the roll direction. Spaces are formed within the wheels 3, 4, accommodate the transmitting oscillator 1 or the receiving oscillator 2, and are filled with a liquid for propagating the ultrasonic waves. In the space, the transmitting oscillator 1 and the receiving oscillator 2 are fixed to the support member and prevented from rotating along with the wheel 3 or 4 for accommodating them. COPYRIGHT: (C)2006,JPO&NCIPI
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