[车辆工程与测控]基于增强磁场涡流的高速轨道缺陷检测方法

doi:10.3969/j.issn.1004-132X.2021.04.010

中国机械工程

[车辆工程与测控]基于增强磁场涡流的高速轨道缺陷检测方法

许鹏1,2;曾泓茗1,2;朱晨露1,2;王平1,2;耿明3;许勇3

1. 南京航空航天大学自动化学院，南京，211106

2. 工业和信息化部高速载运设施的无损检测和监控技术重点实验室，南京，211106

3. 中铁第四勘察设计院集团有限公司，武汉，430063

出版日期:2021-02-25 发布日期:2021-03-05
基金资助:
国家重点研发计划(2018YFB2100903)；
国家自然科学基金重大项目(61527803)；
中国铁路总公司科技研究开发计划(2017G003-0);
中央高校基本科研业务费专项资金(NJ2020014)

High Speed Track Defect Detection Methods Based on Enhanced Magnetic Field Eddy Currents

XU Peng1,2;ZENG Hongming1,2;ZHU Chenlu1,2;WANG Ping1,2;GENG Ming3;XU Yong3

1. College of Automation Engineering,Nanjing University of Aeronautics & Astronautics, Nanjing, 211106

2. Key Laboratory of Non-destructive Testing and Monitoring Technology of High-speed

Transportation Facilities of the Ministry of Industry and Information Technology, Nanjing, 211106
3. China Railway Siyuan Survey and Design Group Co.，Ltd., Wuhan, 430063

Online:2021-02-25 Published:2021-03-05

摘要/Abstract

摘要： 在高速轨道运输领域中，电涡流检测以其非接触、易实现自动化等特点，被广泛应用于钢轨表面缺陷的检测,然而，由于趋肤效应的存在，涡流检测很难探测出内部伤损。提出了一种增强磁场涡流以抑制趋肤效应的方法：在涡流检测线圈之上增加一个通入直流电流的U形电磁铁，用磁轭导磁到钢轨以增强磁轭下的磁场。通过ANSYS软件进行有限元仿真，分析了增强磁场后涡流渗透深度的改变，同时仿真研究了磁轭的提离和间距对检测效果的影响。搭建了高速轨道检测的实验平台，进行了增强磁场涡流实验，结果表明，适当地增大背景磁场能够使涡流检测到深层次的缺陷并可以提高检测信号的信噪比。

关键词: 轨道检测, 涡流检测, 趋肤效应, 有限元仿真

Abstract: In the field of high-speed rail transport, eddy current detections were widely used in the detection of rail surface defects because of non-contact, easy to achieve automation and other characteristics. However, due to the skin effect, it was difficult to detect the internal damages by eddy current testing. A method to enhance the magnetic field eddy currents to suppress the skin effect was proposed: a U-shaped electromagnet with a direct current was added to the eddy current detection coils, and the magnetic yoke was used to conduct magnetism to the steel rail to enhance the magnetic field under the yoke. Through the finite element simulation by ANSYS, the changes of eddy current penetration depths after the enhancement of magnetic field were analyzed. And the influences of yoke lift and distance on the detection effectiveness were simulated. An experimental platform of high-speed track detections was built, and the experiments of enhanced magnetic field eddy currents was carried out. The results show that appropriate background magnetic field enhancement may make eddy current detections have the ability of internal defect detections and improve the signal-to-noise ratio of detection signals.

Key words: rail detection, eddy current testing, skin effect, finite element simulation

中图分类号:

U213.43

许鹏, 曾泓茗, 朱晨露, 王平, 耿明, 许勇. [车辆工程与测控]基于增强磁场涡流的高速轨道缺陷检测方法[J]. 中国机械工程, DOI: 10.3969/j.issn.1004-132X.2021.04.010.

XU Peng, ZENG Hongming, ZHU Chenlu, WANG Ping, GENG Ming, XU Yong.

High Speed Track Defect Detection Methods Based on Enhanced Magnetic Field Eddy Currents

[J]. China Mechanical Engineering, DOI: 10.3969/j.issn.1004-132X.2021.04.010.

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[车辆工程与测控]基于增强磁场涡流的高速轨道缺陷检测方法

High Speed Track Defect Detection Methods Based on Enhanced Magnetic Field Eddy Currents

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