| 摘要 |
PROBLEM TO BE SOLVED: To discriminate a signal detected from a defect, such as cracks, from a reflected signal from a welded structure section organization. SOLUTION: An ultrasonic welding defect flaw detection apparatus includes: an ultrasonic probe 2 having an oscillator 3 for detecting reflection ultrasonic waves, by sending ultrasonic waves to a specimen 1 that is the welded structure section of different kinds of metal; a positioning section 4 for positioning the ultrasonic probe 2 at an appropriate position to the specimen 1; a drive section 5 for moving the ultrasonic probe 2; a focusing deflection section 11 for focusing and deflecting ultrasonic beams to a prescribed position of the specimen 1; and a scanning section 12 for electronically scanning the transmission oscillator groups/reception oscillator groups of the ultrasonic probe 2. Furthermore, the ultrasonic welding defect flaw detection apparatus includes: a flaw detection condition setting means 13 for setting flaw detection conditions including the welding conditions of the specimen and the selection conditions of the oscillator groups; a receiving means 9 for receiving reflection ultrasonic waves from the specimen 1 by the scanning section 12; a signal processing means 15 for processing ultrasonic signals; and a discriminating means 16 for discriminating the defect detection signal of the specimen 1 from the reflection signal of an organization material noise at the welded structure section, according to a characteristic value. COPYRIGHT: (C)2009,JPO&INPIT
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