Localization of defects on buried grid by magnetic field radiation

In this work, a localization of fault on buried grid by radiation is proposed. In order to avoid the use the numerical methods and to permit a simplified modelling, we used a concept founded on Hertziens dipoles method and modified images theory. We treated the applications where we put in evidence the defect on buried grid by confronting the magnetic field radiated at the interface with and without defect, along a profile or on a relief. Indeed the cartography of the electromagnetic field proves to be a very revealing element of the changes that can operate themselves in the time or by current strokes.