Differential eddy current sensor for non-destructive testing of metal elements with internal holes of circular cross section, in particular tubes

摘要

eddy current transducer to the non-destructive testing differential metal elements with internal holes of circular cross section, especially pipes, containing a cylindrical excitation coil on the core nawiniu0119tu0105 niemagnetycznym, nieprzewodzu0105cym, driven sinusoidalnie variable flow, and detector elements, is characterised by having two groups of detector elementseach of the three detector elements (5a, 5b, 5c, 6a, 6b, 6c) for measuring three components of the magnetic induction, placed centrally between the ends wzbudzaju0105cej coils (2), so that they are as close as possible to the surface of the test material and the defect.the sensors used for measuring the components of the two groups are symmetrical relative to the longitudinal axis of the coil wzbudzaju0105cej (2) and are connected differentially.