Abstract
An eddy current nondestructive testing using the Surface Impedance Boundary Condition (SIBC) and Efficient Global Optimization (EGO) is presented in this article. We solve the direct problem of a conducting hollow cylinder comprising a groove, with a finite element method using femm package software. We use the SIBC condition to represent the tube with defects. We compute the sensor impedance variations and use them as input for the inverse problem. We use the EGO algorithm for defect characterization. The main goal of this work is to improve computation time when evaluating cost functions in inversion algorithms. Simulation results show the efficiency of the proposed fit in terms of computation time and accuracy of estimating geometric parameters.
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