| 摘要 |
PROBLEM TO BE SOLVED: To inspect a non-planar part using an eddy current technique. SOLUTION: A non-planar part 32 that has a non-planar surface 35 such as an edge and may contain an anomaly such as a crack 40 is prepared, an eddy current probe 22 is driven at least two frequencies, an eddy current response signal of the non-planar part 32 at each frequency is measured, and a multifrequency phase analysis is performed on the eddy current response signal. This method is used for detecting a crack at or neat the edge of the non-planar surface. COPYRIGHT: (C)2007,JPO&INPIT
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