| 摘要 |
PROBLEM TO BE SOLVED: To obtain a device and method for ultrasonic flaw detection for more precisely detecting any flow which exists in the neighborhood of the surface layer of a specimen than a conventional manner by using one probe without adding any reflector to the neighborhood of the specimen. SOLUTION: This device is provided with a probe 3 for propagating an ultrasonic pulse in a test piece 1 in a contact medium 7, for receiving the ultrasonic pulse reflected on a crack 2 in the test piece 1 as first echo, and for receiving the ultrasonic pulse reflected on the side face part of the test piece 1 as second echo, scanning mechanism part 90 for moving the probe 3 to a prescribed position, and for outputting the spatial position, and transmitting and receiving device 80 for inputting and storing the first echo and the second echo from the probe 3, for inputting and storing the spatial position of the probe 3 at the time of receiving the first and second echo from the scanning mechanism part 90, and for outputting a control signal for moving the probe to a position at which the receiving sensitivity of the first echo can be made maximum to the receiving sensitivity of the second echo to the scanning mechanism part 90. Thus, it is possible to more precisely detect any crack which exists in the neighborhood of the surface layer of the test piece 1 than a conventional manner. |
