电工技术学报2016，Vol.31Issue(24)：134-140,7.
涡流式电磁声发射检测声波响应特性
Acoustic Response Characteristics of Acoustic Emission Induced by Eddy Current Exciting
摘要
Abstract
Due to the contactless local loading of electromagnectic acoustic emission, this paper provides a method for the damage online inspection under severe working conditions, which is a beneficial supplement of traditional acoustic emission technology. This paper studies the acoustic response characteristics arising from electromagnetic acoustic emission under various electromagnetic loads. According to the electroplastic theory and free-electron theory, the mechanism of acoustic emission energy release and the rate variations of the crack tip dislocation slip are analyzed. Thus, the various acosutic responses of the electronic directional movement under different magnetic field directions can be obtained. The electromagnetic acoustic emission signal analysis based on Hilbert-Huang transform (HHT) is an effective tool to extract the features. The experimental results show the stress wave characteristics are closely related to electromagnetic loading. Therefore, this process is the specific acoustic response between the directional mobile electronic and obstacle barrier.关键词
电磁声发射/电致塑性/自由电子理论/希尔伯特黄变换Key words
Electromagnetically induced acoustic emission/electroplastic/free-electron theory/Hilbert-Huang transform分类
信息技术与安全科学引用本文复制引用
蔡智超,刘素贞,张闯,杨庆新..涡流式电磁声发射检测声波响应特性[J].电工技术学报,2016,31(24):134-140,7.基金项目
国家自然科学基金（51307043），河北省自然科学基金（E2016202260）和天津市自然科学基金（16JCYBJC19000）资助项目。 （）
