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Vorrichtung zum ortsaufgeloesten, zerstoerungsfreien Untersuchen des magnetischen Barkhausenrauschens und Verwendung derselben

Device for the high-sensitivity resolution non-destructive examination of magnetic Barkhausen noise and use of the same
 
: Altpeter, I.; Theiner, W.; Gessner, M.

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Frontpage ()

DE 1992-4243532 A: 19921222
DE 1992-4243532 A: 19921222
DE 4243532 A1: 19940623
G01L0001
German
Patent, Electronic Publication
Fraunhofer IZFP ()

Abstract
The invention relates to a device for the high-sensitivity resolution non-destructive examination of magnetic Barkhausen noise in the surface area of a unit under test, said device consisting of an induction sensor which consists of a ferro-magnetic core with two core parts separated by a launch gap and at least one induction coil, whereby the core of the induction sensors tapers to a point in the external mouth area of the launch gap, and a ranging sensor is provided for measuring the distance between the induction sensor and the surface of the unit under test, and the distance between the induction sensor and the surface of the unit under test is adjustable by means of a distance adjuster, whereby an impedance tester is provided and the induction sensor is excited by an alternating field.

: http://publica.fraunhofer.de/documents/PX-40744.html