Method and apparatus for near-surface detection of sub-surface current-density distribution

摘要

The invention relates to a method and an apparatus for near-surface detection of current density distributions in a substrate, wherein the magnetic field measured according to the method generated in the substrate and the current density distribution is determined in the subsurface thereof. The invention is based on the technical problem of providing a new, non-invasive method and apparatus that enable a determination of the current density distribution with higher accuracy. According to the invention generates an alternating current in the method in the subsurface directly whose magnetic field is measured. For this purpose a device of the invention is provided.