NDLI: Prediction of eddy current probe sensitivity for the sizing of case depth in ferrous components

Content Provider	IEEE Xplore Digital Library
Author	Palanisamy, R.
Copyright Year	1965
Abstract	The state-of-the-art eddy current techniques employ encircling coils for the nondestructive measurement of case depth in bearing components. The encircling coil technique measures bulk case depth properties in a test specimen. This approach lacks the necessary spatial resolution to detect local variations in case depth. A better approach to image case depth would be to scan a rotating test specimen with an eddy current probe, thus achieving the desired spatial resolution and 100 percent inspection. In this paper, the feasibility of employing two types of eddy current probes (absolute coil shielded pencil probe, and an absolute coil U-core probe) to measure case depth in induction hardened bearing components is theoretically studied using axisymmetric and two-dimensional finite element analysis techniques. The range of optimum probe excitation frequencies for higher detection sensitivity has been theoretically selected for the U-core probe.
Sponsorship	IEEE Magnetics Society
Starting Page	3308
Ending Page	3310
Page Count	3
File Size	266371
File Format	PDF
ISSN	00189464
Volume Number	23
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1987-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Eddy currents Probes Coils Finite element methods Magnetic analysis Current measurement Testing Spatial resolution Rolling bearings Steel
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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