TESTING METHOD OF SPLIT TYPE VERTICAL PROBE OF AUTOMATIC ULTRASONIC FLAW DETECTING DEVICE FOR THICK PLATE

摘要

PURPOSE:To test simultaneously, automatically and efficiently the soundness of plural probes by scanning a split surface of the probe and a slit-shaped detect of a flat bottom of a test piece for verification so as to become orthogonal to them. CONSTITUTION:A slit-shaped artificial defect 11a is formed to a width of, for instance, about 2-6mm. on the bottom part of a verification use test piece 11, and a probe 1 group or a test piece 11 group is moved so as to be orthogonal to an acoustic split surface 3 of the probe 1 and the slit-shaped defect 11a of the test piece 11. At the time of said scan, a bottom face echo output BG and a defect echo output F from an ultrasonic flaw detector 17 are F/BG-recorded by a recording device 18 and a digital recorder 19. In this way, by measuring an ultrasonic echo output reflected from the bottom part of the test piece 11, an echo output from the defect 11a of the test piese 11, and a distance exceeding a prescribed output, the soundness of each probe 1 can be inspected simultaneously with a high efficiency by F/BG of the respective probes 1 and the effective bit width.