Defect classification using PEC respones based on power spectral density analysis combined with EMD and EEMD

Defect classification using PEC respones based on power spectral density analysis combined with EMD and EEMD

Defect classification

Empirical mode decomposition

Ensemble empirical mode decomposition

Power spectrum density analysis

Pulsed eddy current

The defect classification is investigated by using features-based giant-magnetoresistive pulsed eddy current (GMR-PEC) sensor. The power spectrum density of the intrinsic mode functions (IMFs) is extracted as the classification feature, considering the disadvantage of selecting a wavelet base determined in previous work on spectral analysis combined with wavelet-decomposition. The IMFs are derived through empirical mode decomposition (EMD) and ensemble EMD. Principal component analysis, linear discriminant analysis, and Bayesian classifier are employed for defect classification algorithm. The proposed approach is validated by experiments, and results indicate that the cracks and cavities in the surface and subsurface can be classified satisfactorily.

37-51

78

Peng, Ying

Qiu, Xuanbing

Wei, Jilin

Li, Chuanliang

Cui, Xiaochao

NDT & E International

2016

journalArticle

0963-8695

10.1016/j.ndteint.2015.11.003