基于瞬变电磁法的传感器设计及仿真研究
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TN98

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Sensor design based on transient electromagnetic detection technology
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    摘要:

    针对瞬变电磁检测技术探头开展研究。首先介绍了瞬变电磁技术原理,分析目前几种聚焦探头的优缺点,然后根据设计要求提出一种新型瞬变电磁聚焦探头结构,解决瞬变电磁探头不聚焦,能量小及设备笨重等缺点,最后通过有限元仿真验证新型聚焦探头的聚焦效果,并与传统线圈仿真结果进行对比。结果表明,新型聚焦探头使磁场的主要能量聚焦在半径小于0.3 m,比传统线圈磁场分布缩小了40%,磁感应强度B=1.499 8×10-5,比传统线圈感应强度提高了19.3%,且聚焦探头比传统线圈的磁感应强度分布梯度较大。为瞬变电磁技术探头优化设计及精确测量金属管道腐蚀量提供了有效的参考价值,也为该技术在压力管道和热力管道的扩展应用提供了依据。

    Abstract:

    Research on probes for transient electromagnetic detection technology. Firstly, the principle of transient electromagnetic technology is introduced, and the advantages and disadvantages of several kinds of focusing probes are analyzed. Then, a new type of transient electromagnetic focusing probe structure is proposed according to the design requirements, which solves the shortcomings of transient electromagnetic probes, such as non-focusing, low energy and heavy equipment. Finally, The finite element simulation is used to verify the focusing effect of the new focusing probe, and compared with the traditional coil simulation results, the results show that the new focusing probe focuses the main energy of the magnetic field at a radius of less than 0.3 m, which is 40% smaller than the traditional coil magnetic field distribution, and the magnetic induction intensity. B=1.499 8×10-5, which is 19.3% higher than the traditional coil induction intensity, and the focus probe has a larger gradient of magnetic induction intensity distribution than the conventional coil. It provides an effective reference value for optimizing the design of transient electromagnetic technology probes and accurately measuring the corrosion of metal pipes. It also provides a basis for the extended application of this technology in pressure pipes and heat pipes.

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刘晓青,张涛.基于瞬变电磁法的传感器设计及仿真研究[J].电子测量技术,2019,42(5):123-127

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  • 在线发布日期: 2021-07-29
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