In this research, a uniform eddy current multi-probe to apply to the complex structure and inspect the cracks at high-speed data ac quisition was developed. Pick-up coils of the developed probe were arranged on a flexible printed circuit board. It was confirmed t hat the SCC (stress corrosion cracking) of real flaw was able to be detected with developed uniform eddy current multi-probe by usin g the ferrite core for the exciting coil and considering the impedance matching of the exciting coil and the flaw ...
英字タイトル:
Development of uniform eddy current multi-probe and characteristic evaluation of SCC detection

In yoke method magnetic-particle testing, it is necessary to perform the testing at least two times by changing the direction of magnetization. In a rotating field type magnetizer using a three-phase al ternating current (AC), any directional flaw can be detected by a single testing. In this research, the distributions of the rotating magnetic flux density were evaluated by measuring this density using Hall elements (in three directions) and by numerical analysis. The distributions of the magnetic flux den...
英字タイトル:
Evaluation of generated field in magnetic-particle testing using rotating field