| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic flaw detector capable of efficiently inspecting the welding of a welded structure with high accuracy, and to provide a method using the same. SOLUTION: The ultrasonic flaw detector is equipped with a means for arranging an array type ultrasonic probe 2 equipped with a plurality of vibrators on the surface of an object 1 to be inspected, a drive means for moving the array type ultrasonic probe 2, a means for selecting the vibrators of the array type ultrasonic probe 2 as an ultrasonic transmission vibrator and an ultrasonic detection vibrator on the basis of the shape dimension of the object 1 to be inspected, a material of a welded part and a welding condition, a means 6 for converging and deflecting ultrasonic beam to the position of the object to be inspected using the selected vibrator group, a means 6 performing the electronic scanning of the ultrasonic transmission vibrator and the ultrasonic detection vibrator, a means 12 for performing image processing on the basis of the ultrasonic waveform detected by the ultrasonic detection vibrator to display an image processing result, a means for performing analyzing processing on the basis of the ultrasonic waveform and using the electronic scanning position of the ultrasonic probe or the amplitude value distribution of a flaw signal to a mechanical scanning position to calculate flaw data, and a means 12 for displaying the analyzed result.
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