Transformation of the rotating eddy current testing signal at the desired eddy current orientation
Transformation of the rotating eddy current testing signal at the desired eddy current orientation
复制标题
在所需的涡流方向上转换旋转涡流测试信号
DOI：
10.1016/j.ndteint.2021.102551
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发表时间：
2021-10-21
影响因子：
4.2
通讯作者：
Yusa, Noritaka
中科院分区：
文献类型：
--
作者：
Ge, Jiuhao;Yang, Chenkai;Yusa, Noritaka
旋转涡流测试的结果可以被视为正交方向上均匀的涡流测试的结果。但是，在定向无损测试问题（例如焊接检测）的情况下，只有垂直于裂纹的诱导电流的结果具有最大的灵敏度。相比之下，其他诱导的电流取向的结果可能会经历焊缝产生的大量噪声。在这项工作中，提出了一种简短的方法，将旋转电流测试的结果转换为所需涡流方向下均匀的涡流测试的结果。实验表明，转换结果的信号分布与振幅与均匀涡流测试的结果之间有很好的匹配。此外，提出的方法用于焊接检测。结果表明，焊缝噪声显着下降，可以清楚地识别缝隙的位置。结果证实了所提出的方法可以提高检测能力并扩展旋转涡流测试技术的应用。
The results of rotating eddy current testing can be regarded as the results superposed by uniform eddy current testing in orthogonal directions. However, in the case of directional nondestructive testing problems, such as weld detection, only the results from the induced current that is perpendicular to the crack have the greatest sensitivity. In contrast, the results from other induced current orientations may experience substantial noise generated by welds. In this work, a brief method is proposed to transform the results of rotating eddy current testing into the results of uniform eddy current testing at the desired eddy current orientation. The experiments indicated a good match between the signal distribution and amplitude of the transformed results and the results of the uniform eddy current testing. Moreover, the proposed method was applied for weld detection. The results revealed that the weld noise significantly decreased and that the locations of slits could be clearly identified. The results validated that the proposed method can improve the detection ability and expand the application of the rotating eddy current testing technique.