METHOD FOR PRODUCING A HIGH-DYNAMICS AND HIGH-SPATIAL RESOLUTION EDDY CURRENT TESTING HEAD

摘要

The invention concerns a method for producing an assembly of at least one transmission coil (B₁) and one reception coil (B₂) for eddy current testing, the reception coil receiving in the absence of fault a complex amplitude signal V_R, subjected to a variation dV_R in the presence of a characteristic fault to be detected. The method consists in selecting the distance ?_ER between the axes of the transmission coil and the reception coil so as to maximize the ratio I dV_R/V_R I.