Leakage flux probe for non-destructive leakage flux-testing of bodies consisting of magnetisable material

摘要

A leakage flux probe for non-destructive leakage flux-testing of magnetizable bodies comprising a plurality of coils for detection of near-surface flaws in the body, wherein the coils have a degree of sensitivity which is dependent upon the orientation of the flaws in the body, and wherein coils having a different degree of sensitivity are disposed in the leakage flux probe with a first type of coil having a high degree of sensitivity for longitudinal flaws or transverse flaws and a second type of coil having a high degree of sensitivity for oblique flaws.

主权项

1. A leakage flux probe for non-destructive leakage flux-testing of bodies comprising a magnetisable material, said leakage flux probe comprising a plurality of coils for detection of near-surface flaws in the body, wherein the coils have a degree of sensitivity which is dependent upon the orientation of the flaws in the body, and wherein coils having a different shape causing a different degree of sensitivity are disposed in the leakage flux probe with a first shape type of coil having a high degree of sensitivity for longitudinal flaws or transverse flaws and a second shape type of coil having a high degree of sensitivity for oblique flaws, wherein the first and second shape type of coils are annular and have an annular flat winding, the first shape type of coils is formed as circular coils, wherein the second shape type of coils is formed as elongate annular coils being a stretched circular coil, wherein the coils are imprinted on a testing side of a printed circuit board, the testing side facing towards the body to be tested.