摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic flaw detector of a phased array ultrasonic flaw detection system for further widening a range (an area where sound pressure is large) for providing a high focusing effect. SOLUTION: This ultrasonic flaw detector comprises: a phased array probe 11 having a structure in which a vibrator group 16 is mounted on a first wedge 17, the vibrator group 16 being made by arranging a plurality of vibrators 15 into a circular shape, etc., and an ultrasonic wave exit surface 17a of the first wedge is a circular concave shape; a second wedge 20 installed between the array probe and a body 18 under inspection with an ultrasonic wave entrance surface 20a, that abuts on the exit surface of the first wedge, having a circular convex shape coinciding with the circular concave shape of the exit surface of the first wedge; and an angle detection means for detecting an angle which the array probe forms with the body under inspection when moving the array probe along an ultrasonic wave entrance surface of the second wedge. Alternatively, it is also possible to partly drive the vibrator group made by arranging the plurality of vibrators 15 into a circular shape. COPYRIGHT: (C)2006,JPO&NCIPI
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