Taking into account the characteristic of the high-voltage transmission line, this paper discusses the basic principle of the eddycurrenttestingmethod.
Considering problem of the leading electrode of the Locomotive traction motor crack flaw, the eddycurrenttestingmethod for leading electrode crack defect is researched in the paper.
针对机车牵引电机主极裂纹问题，本文深入地研究了用电涡流方法实现对主极裂纹检测的问题。
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Digital correlation method was used to extract phase information as the phase information of eddycurrenttesting signals could reflect the characteristics of detecting system.