Brief description of a control head realisaion of a foucault currents of a large dynamic range and a high spatial resolution

摘要

The present invention relates to a process for the production of an assembly of at least one transmission coil (b1) and a take-up spool (b2) for eddy current inspection, the receiving reel receiving in the absence of a complex amplitude signal vr, subjected to a variation deltavr in the presence of a fault type deltaer to choose the distance between the axes of the coils of emission and reception, so as to maximize the ratio | deltavr / vr.|.