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Journal of Sensors
Volume 2014, Article ID 727269, 8 pages
Research Article

Surface Crack Detection for Carbon Fiber Reinforced Plastic Materials Using Pulsed Eddy Current Based on Rectangular Differential Probe

Jialong Wu,1,2 Deqiang Zhou,1,2,3 and Jun Wang1,2

1School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China
2The Key Laboratory for Advanced Food Manufacturing Equipment Technology of Jiangsu Province, Wuxi 214122, China
3Wuxi G.S Precision Tool Co., LTD, Wuxi 214024, China

Received 18 June 2014; Accepted 28 August 2014; Published 12 October 2014

Academic Editor: Geoffrey A. Cranch

Copyright © 2014 Jialong Wu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Aiming at the surface defect inspection of carbon fiber reinforced composite, the differential and the direct measurement finite element simulation models of pulsed eddy current flaw detection were built. The principle of differential pulsed eddy current detection was analyzed and the sensitivity of defect detection was compared through two kinds of measurements. The validity of simulation results was demonstrated by experiments. The simulation and experimental results show that the pulsed eddy current detection method based on rectangular differential probe can effectively improve the sensitivity of surface defect detection of carbon fiber reinforced composite material.