Numerical calibration of fluxset probe for quantitative eddy current testing

Fluxset type eddy current probes are used for defecting discontinuities in conducting materials. The measurements obtained by such probes can be used for the reconstruction of the parameters of the detected discontinuity if t he output signal of the measurement is uniquely related to the measured fie ld. In this paper a calibration method is Presented for the establishment o f the relation between the measured magnetic field and the output signal of the probe. The relation is obtained by the optimisation of the parameters of the mapping between the calculated magnetic field distribution and the m easured output signal The magnetic field distribution due to the interactio n of the probe and an infinitesimally thin crack located in a conducting Pl ate is calculated numerically by the solution of a boundary integral equati on.