钢板缺陷的磁致伸缩SH<sub>0</sub>模态导波扫查传感器

吴斌; 刘飞鹏; 刘秀成; 王欢; 杨宁祥; 刘尧

doi:10.11973/wsjc202101020

钢板缺陷的磁致伸缩SH₀模态导波扫查传感器

吴斌¹,
刘飞鹏¹,
刘秀成^1, ,,
王欢¹,
杨宁祥²,
刘尧¹

1. 北京工业大学机械工程与应用电子技术学院, 北京 100124;
2. 广东省特种设备检测研究院珠海检测院, 珠海 519002

基金项目:

广东省市场监督管理局科技项目（2020ZT04）

详细信息

作者简介:
吴斌(1962-),男,教授,主要研究领域为超声和电磁无损检测技术

通讯作者:
刘秀成, E-mail:xiuchliu@bjut.edu.cn

中图分类号: TB551;TG115.28
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出版历程
- 收稿日期: 2020-03-20
- 刊出日期: 2021-01-09

Scanning magnetostrictive sensor of SH₀ guided wave for steel plate defects

1. College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China;
2. Zhuhai Branch, Guangdong Institute of Special Equipment Inspection and Research, Zhuhai 519002, China

摘要

摘要: 研制了一种具有优化检测线圈和高激发效率的传感器。通过在矩形截面检测线圈内布置导磁性屏蔽层，减小矩形线圈上、下导线形成的动态磁场的相消程度，在降低线圈高度的同时保持线圈的导波检测能力；采用U型永磁磁路对铁钴合金带材进行恒定磁化，提升传感器的导波激发效率，采用有限元仿真优化了永磁磁路的磁极间距和高度；利用研制的扫查传感器在含缺陷钢板中进行了测试。结果表明：相比剩磁状态，永磁磁路磁化时传感器对回波信号的检测能力明显提升，扫查过程中检测信号波形峰峰值的变异系数小于9.1%，具有良好的稳定性。
- 磁致伸缩传感器 /
- SH₀模态 /
- 屏蔽层
Abstract: A scanning magnetostrictive sensor (MsS) with optimal coil configuration and high excitation efficiency was developed. Magnetic shield was placed inside the rectangular sensing coil to suppress the cancellation effect between the dynamic magnetic fields provided by the upper and lower wire current, respectively. Therefore, the height of the sensing coil can be reduced while retaining the guided wave detection ability of the sensing coil. U-shape permanent magnetizer was employed for realizing stable magnetization of the FeCo strip so that the excitation efficiency of the sensor can be improved. Finite element simulation was used for optimizing the width and height of the yoke. Experimental tests were conducted in a defective steel plate using the proposed scanning MsS. The results show that the guided wave detection ability of the MsS with permanent magnetizer was significantly improved as compared with that was tested under the condition of remanence. The coefficient of variation of the data obtained during the scanning process is less than 9. 1%, indicating very good stability of the scanning sensor.
- magnetostrictive sensor /
- SH₀ mode /
- shield layer

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参考文献(8)

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