A sensor measuring the Fourier coefficients of the magnetic flux density for pipe crack detection using the magnetic flux leakage method
A sensor measuring the Fourier coefficients of the magnetic flux density for pipe crack detection using the magnetic flux leakage method
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DOI：
10.1063/1.3535546
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发表时间：
2011-04-01
影响因子：
3.2
通讯作者：
Mizuide, M.
中科院分区：
文献类型：
--
作者：
Nara, T.;Takanashi, Y.;Mizuide, M.
提出了一种用于检测铁磁管道表面裂纹的漏磁方法的简单传感器。我们表明，裂纹位置可以通过管道横截面中管道内部圆上的漏磁通密度的傅立叶系数来确定。制作了直接输出傅里叶余弦和正弦系数的线圈。实验结果表明，仅使用这两个线圈而不是数十个磁传感器，就可以定位管道内外表面裂纹的中心位置。 (C) 2011 年美国物理研究所。 [doi:10.1063/1.3535546]
A simple sensor for magnetic flux leakage methods of detecting cracks on the surfaces of ferromagnetic pipes is proposed. We show that the crack position can be determined by the Fourier coefficients of the leakage magnetic flux density on a circle inside the pipe in the pipe cross-sectional plane. Coils that directly output the Fourier cosine and sine coefficients were made. The experimental results showed that, using only these two coils rather than dozens of magnetic sensors, the center position of a crack on the inside/outside surface of the pipe could be localized. (C) 2011 American Institute of Physics. [doi:10.1063/1.3535546]