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Reconstruction of 3D defect profiles from the MFLT signals by using a radial wavelet basis function neural network iterative model

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To achieve multi-resolution approximation of 3D defect profile reconstruction from magnetic flux leakage (MFL) signals, a radial wavelet basis function neural network iterative model, which contains a forward model and an inverse model based on a parallel radial wavelet basis function neural network (PRWBFNN), is proposed. The forward model in the loop is to determine the MFL signals for a given set of flaw parameters, and the inverse model is used to predict the profile given the measured value of the MFL signals and acts to constrain the solution space. This approach iteratively adjusts the weights of the inverse network to minimise the error between the measured and predicted values of the MFL signals. The reconstruction results of different defects indicate that significant advantages over other neural network-based defect characterisation schemes could be obtained.
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Keywords: 3D DEFECT PROFILE RECONSTRUCTION; ITERATIVE MODEL; MAGNETIC FLUX LEAKAGE TESTING; MULTI-RESOLUTION APPROXIMATION; RADIAL WAVELET BASIS FUNCTION NEURAL NETWORK

Document Type: Research Article

Publication date: 2012-03-01

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