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本文从分析激励线圈周围的似稳电磁场及管壁中的扩散电磁场的特性出发，详细的讨论了远场涡流检测的各种特性，得出了与实验及有限元计算结果一致的结论。
Based on the analysis of the steady-state electromagnetic field around the excitation coil and the diffusion electromagnetic field in the tube wall, various characteristics of the far-field eddy current detection are discussed in detail. The conclusion is consistent with the experimental and finite element calculation results.