| 摘要 |
PURPOSE:To improve the reliability of products manufactured on an automatic manufacture line by discriminating between the output signal of a flaw detector which is generated by the shape change of a body to be inspected and a signal generated owing to the presence of a surface defect or defect nearby a surface. CONSTITUTION:An eddy current flaw detection probe 9 for plane inspection is installed nearby the object surface of a body 1 to be inspected which is fixed by the chuck 8 of a turntable 7 and the entire upward object surface of flaw detection is scanned to detect a flaw. The position detector composed of a peripheral encoder 17, up/down encoders 18 and 19, and a radial encoder 20 measures the position of the flaw-detected surface by inspected by the probe 9. A signal processor 21 reads the inspection position while the detection signal from the eddy current flow detector 16 exceeds a threshold value and stores defect position information temporarily until the inspection end of one body to be inspected. Then, a computer 22 discriminates between the output signal based upon a shape discontinuous part stored in the processor 21 and a signal generated owing to a defect on the basis of data on the shape size of the object body and also makes displays 24 and 25.
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