Document Type

Patent

Publication Date

12-26-1995

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.

Patent Number

US 5,479,099 A

Assignee

Iowa State University Research Foundation, Inc.

Application Number

US 08/139,272

Date Filed

10-18-1993

Language

en

File Format

application/pdf

Share

COinS