Guided Wave Signal Recognition by Orthogonal Matching Pursuit Based on Modified Evolutionary Programming Algorithm
SHEN Chuanjun
LIU Yan
WANG Yuemin
SUN Fengrui
Abstract：A kind of modified evolutionary programming using mutations based on the t probability distribution(M tEP) is proposed and applied to the orthogonal matching pursuit method .Three kinds of mutation operators are compared and the chirplet function is chosen as matching atom .An aluminum pipe with holes is inspected by guided wave testing system and the measured signal is decomposed and reconstructed by the orthogonal matching pursuit method .The SNR of the processed signal is improved obviously .The matched result is compared to the matched result from OMP with EP using mutations based on the t probability distribution(tEP) .The matched parameters get from OMP with MtEP and tEP are compared and analyzed .The center frequency of the excitation signal are more exactly and the computation time is shorter by OMP based on M tEP than based on tEP .Therefore ,OMP based on MtEP is a useful signal recognition approach for pipes guided wave NDT .
Keywords：modified evolutionary programmingorthogonal matching pursuitaluminum pipeguided wavesignal recognition
Publication Date：2015-10-01
Pages：5( 65-69 )