电工技术学报2017，Vol.32Issue(18)：98-105,8.DOI:10.19595/j.cnki.1000-6753.tces.161717
基于电磁超声换能器的铁磁材料电磁声发射检测方法
Electromagnetic Acoustic Emission Detection Method of Ferromagnetic Materials Based on the EMAT
金亮 1寇晓斐 1郭富坤 1杨庆新 1杜崇杰2
作者信息
- 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
- 折叠
摘要
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.关键词
电磁超声换能器/电磁声发射/铁磁材料/磁致伸缩Key words
Electromagnetic acoustic transducer/electromagnetic acoustic emission/ferromagnetic material/magnetostriction分类
信息技术与安全科学引用本文复制引用
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):98-105,8.
