基于相位提取的铁磁钢板表面下缺陷磁通量泄漏检测

Ma Chengjian, Liu Yang, Shen Changyu

China Jiliang University, Hangzhou 310018, China.

Sensors (Basel). 2022 Apr 26;22(9):3322. doi: 10.3390/s22093322.

Magnetic flux leakage (MFL) based on phase extraction for detecting the subsurface defects in ferromagnetic steel plate was investigated. The relationship between electromagnetic field phase and the subsurface defect was analyzed. Low-frequency alternating current (AC) excitation source and high-power magnetizer arrangement with Hall sensor were used to increase the skin depth of the MFL. Experiments results showed that 12 mm deep subsurface defect can be detected by using the phase extraction means, which is about two times higher than that by using the amplitude method.

研究了基于相位提取的漏磁场（MFL）用于检测铁磁钢板表面下缺陷的方法。分析了电磁场相位与表面下缺陷之间的关系。采用低频交流（AC）激励源和带霍尔传感器的高功率磁化器装置来增加漏磁场的趋肤深度。实验结果表明，使用相位提取方法可以检测到12毫米深的表面下缺陷，这比使用幅度法检测到的深度高出约两倍。