Eddy Current Exciting Method for Electromagnetically Induced Acoustic Emission Detecting Technique
Liu Suzhen1, Jin Liang2, Zhang Chuang1, Yang Qingxin1, 2
1. Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology Tianjin 300130 China 2. Key Laboratory of Advanced Electrical Engineering and Energy Technology Tianjin Polytechnic University Tianjin 300387 China
Abstract：The paper demonstrates the feasibility of acoustic emission(AE) induced by eddy current through analyzing the change of deformation at the tip of defect with the exciting current through the finite element method (FEM) of electromagnetically induced acoustic emission (EMAE). In addition, the deformation nature of defect is determined by the fracture mechanics. The experiment of EMAE is carried out. Acoustic emission signals of the defect are received and the crack is located by AE signals. The established feature of AE signals proves that FEM is correct, which provides a firm theoretical and experimental foundation to the direct calculation and analysis of amplitude and frequency feature of EMAE.
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2012, Vol. 27 
