LIU Xiang-biao, LI Yong, CHEN Zhen-mao, et al. PCA-ICA integrated technique for noise suppression of pulsed remote field eddy current inspection[J]. 2015, 34(1): 69-72.
LIU Xiang-biao, LI Yong, CHEN Zhen-mao, et al. PCA-ICA integrated technique for noise suppression of pulsed remote field eddy current inspection[J]. 2015, 34(1): 69-72. DOI: 10.13873/J.1000-9787(2015)01-0069-04.
As one of the advanced electromagnetic nondestructive evaluation technique
pulsed remote field eddy current( PRFEC) has been found advantageous in inspection of magnetic tubular structures( MTS). However
inhomogeneous distribution of permeability of practical MTS results in noise in PRFEC signals
and thus decreases the signal-to-noise ratio( SNR) and evaluation accuracy. In light of this
propose principal component analysisindependent component analysis( PCA-ICA) integrated technique for suppression of noise in PRFEC signals. After signals are processed via PCA
the 1-order and 2-order vectors are input into ICA
flexible joint approximative diagnalization of eigenmatrix( FJADE) algorithm is subsequently applied to distinguish the defect signals and noise. Through simulations and experiments
it has been found the proposed PCA-ICA integrated technique is capable of effectively suppressing the noise caused by inhomogeneous distribution of permeability of MTS
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