| 摘要 |
PURPOSE:To contrive precision measurement of position and size of a flaw, by fractionnating range of inspection inside an object to be inspected. CONSTITUTION:A position of penetrated eddy current in the direction of depth inside the object to be inspected through changing delta1, and delta2, by changing magnetic exciting frequency of oscillator for magnetic excitation or changing strength of DC magnetic field which magnetizes the object 3. On the other hand, by positioning in the direction of scanning through scanning of detecting coil 2, fractionation of inspection range S inside the object 3, measurements of position and size of flaw inside the object 3 can be accomplished. |
