电工技术学报  2017, Vol. 32 Issue (18): 98-105    DOI: 10.19595/j.cnki.1000-6753.tces.161717
电工理论与新技术 |
基于电磁超声换能器的铁磁材料电磁声发射检测方法
金亮1, 寇晓斐1, 郭富坤1, 杨庆新1, 杜崇杰2
1. 天津工业大学电工电能新技术天津市重点实验室 天津 300387;
2. 国网河北省电力公司 石家庄 050021
Electromagnetic Acoustic Emission Detection Method of Ferromagnetic Materials Based on the EMAT
Jin Liang1, Kou Xiaofei1, Guo Fukun1, Yang Qingxin1, Du Chongjie2
1. Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University Tianjin 300387 China;
2. State Grid Hebei Electric Power Company Shijiazhuang 050021 China
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摘要 电磁超声换能器(EMAT)因其非接触式的检测特点被广泛应用于无损检测和无损评估中,但如何用其判定裂纹的活性尚未见报道。因电磁声发射技术能够对微细裂纹进行检测并判定其活性,在考虑磁致伸缩效应的基础上,根据EMAT和电磁声发射两种检测方法的原理特性,实现EMAT对铁磁材料的电磁声发射检测。对EMAT进行仿真分析和实验,结合凯瑟效应和声发射理论,给出裂纹活性的判定依据。仿真和实验结果表明,EMAT可在铁磁材料中激发声发射信号,并实现对铁磁材料的损伤评定,为EMAT在实际检测中判定裂纹活性提供了理论和实践指导。
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金亮
寇晓斐
郭富坤
杨庆新
杜崇杰
关键词 电磁超声换能器电磁声发射铁磁材料磁致伸缩    
Abstract:The electromagnetic acoustic transducer (EMAT) is widely used in non-destructive testing and non-destructive evaluation due to its feature of non-contact testing. However, researches and reports on how to use it to judge the crack activity have not been seen. Since the electromagnetic acoustic emission technology can be used to detect microcracks and judge their activity, the detection by EMAT on the electromagnetic acoustic emission of ferromagnetic materials is realized in an innovative manner on the basis of taking the magnetostrictive effect into consideration and according to the principles and properties of the two detection methods of EMAT and electromagnetic acoustic emission technology. This paper offers simulation analyses and experiments on EMAT and provides a judgment basis for the crack activity. The simulation and experimental results show that EMAT can generate acoustic emission signals in the ferromagnetic material and accomplish the destruction assessment on the ferromagnetic material, which provides theoretical and practical instructions in the judgment of crack activity in actual detections by EMAT.
Key wordsElectromagnetic acoustic transducer    electromagnetic acoustic emission    ferromagnetic material    magnetostriction   
     出版日期: 2017-10-10
PACS: TM153  
作者简介: 金 亮 男,1982年生,博士,讲师,主要从事电磁场云计算和电磁无损检测方面的研究工作。E-mail: jinliang@tjpu.edu.cn(通信作者);寇晓斐 男,1992年生,硕士研究生,主要从事电磁无损检测方面的研究。E-mail: 972092373@qq.com
引用本文:   
金亮, 寇晓斐, 郭富坤, 杨庆新, 杜崇杰. 基于电磁超声换能器的铁磁材料电磁声发射检测方法[J]. 电工技术学报, 2017, 32(18): 98-105. Jin Liang, Kou Xiaofei, Guo Fukun, Yang Qingxin, Du Chongjie. Electromagnetic Acoustic Emission Detection Method of Ferromagnetic Materials Based on the EMAT. Transactions of China Electrotechnical Society, 2017, 32(18): 98-105.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.161717          https://dgjsxb.ces-transaction.com/CN/Y2017/V32/I18/98