Magnetic inspection head suited for contoured or irregular surfa

Details Magnetic inspection head suited for contoured or irregular surfa Magnetic inspection head suited for contoured or irregular surfa

1993-10-18

1995-12-26

O'Shea, Sandra L.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324239, 324262, 324222, 336234, G01R 3312, G01N 2772, H01F 2724

Patent

active

054790999

ABSTRACT:
A magnetic inspection head adapted for use with samples having non-planar surfaces. A magnetically permeable core has a pair of poles joined by a magnetically permeable bridge to form a closed magnetic circuit between the pole legs, bridge and the test material. Each pole has magnetically permeable support means terminating in a magnetically permeable deformable surface for engaging the sample. The support means is yieldable such that when the inspection head is placed in contact with the irregular surface of the sample, the deformable surface is deformed to accommodate the shape of the sample with minimal air gaps therebetween. Preferably, the deformable surface is provided by a plurality of pins slidably engaged in a pole structure and urged outwardly for contact with and conformance with a non-planar sample surface.

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