High-sensitivity phase imaging eddy current magneto-optical system for carbon fiber reinforced polymers detection  

作　　者：Jiang-Shan Ai Quan Zhou Yi-Ping Liang Chun-Rui Feng Bing Long Li-Bing Bai Yong-Gang Wang Chao Ren 

机构地区：[1]School of Automation Engineering,University of Electronic Science and Technology of China,Chengdu,611731,China [2]Department of Mechanical Engineering,Catholic University of Leuven,Leuven,3001,Belgium [3]Chengdu Aircraft Industry Company Ltd.,Chengdu,610091,China

出　　处：《Journal of Electronic Science and Technology》2023年第4期48-59,共12页电子科技学刊（英文版）

基　　金：the National Natural Science Foundation of China under Grants No.U2030205,No.62003075,No.61903065,and No.62003074;Sichuan Science and Technology Planning Project under Grant No.2022JDJQ0040.

摘　　要：This paper proposed a high-sensitivity phase imaging eddy current magneto-optical (PI-ECMO) system for carbon fiber reinforced polymer (CFRP) defect detection. In contrast to other eddy current-based detection systems, the proposed system employs a fixed position excitation coil while enabling the detection point to move within the detection region. This configuration effectively mitigates the interference caused by the lift-off effect, which is commonly observed in systems with moving excitation coils. Correspondingly, the relationship between the defect characteristics (orientation and position) and the surface vertical magnetic field distribution (amplitude and phase) is studied in detail by theoretical analysis and numerical simulations. Experiments conducted on woven CFRP plates demonstrate that the designed PI-ECMO system is capable of effectively detecting both surface and internal cracks, as well as impact defects. The excitation current is significantly reduced compared with traditional eddy current magneto-optical (ECMO) systems.

关 键 词：Carbon fiber reinforced polymers Defect detection Eddy current magneto-optical Nondestructive testing Phase imaging 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]