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Abstract:
In order to figure out the optimum selection of wavelet packet basis functions in magnetic flux leakage signal pretreatment, some theoretical analysis about the selection of wavelet packet basis function of signal petreatment of magnetic flux leakage testing of petroleum pipeline defects is made. The innovation of this paper lies in that we make the energy coefficient, the extreme value of floating error and the mean value of error of peaks and valleys be the three criteria. After screening, the optimum selection is obtained from frequently-used wavelet packet basis functions. Experimental results show that this method Conveniently deals with the selection of wavelet packet basis functions in high efficiencies, which is more suitable for the selection of wavelet packet basis function in magnetic flux leakage signal petreatment.
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