Every year, Intercontr le teams inspect approximately 70000 tubes with a bobbin coil.
Defect identification is carried out with the parameters extracted from eddy current signals.
We present eddy current signal inversion for axisymetric defects using bobbin coil. We demonstrate that optimization based on global models is necessary to converge to the best solution. Comparisons between ESA algorithm, simplex algorithm and genetic algorithm will be thoroughly described. Held by the Joint Research Centre of the European Commission.