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Proceedings Paper

Subsurface discrimination using electromagnetic induction sensors
Author(s): Thomas H. Bell; Bruce J. Barrow; Jonathan M. Miller
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Paper Abstract

This paper reviews the problem of subsurface discrimination using electromagnetic induction sensors. Typically, discrimination is based on differences in the multiaxis magnetic polarizability between different objects. We review work on frequency and time domain systems, and their interrelationship. We present the results of comprehensive measurements of the multiaxis electromagnetic induction response of a variety of inert ordnance items, ordnance fragments and scrap metal pieces recovered from firing ranges. The extent to which the distributions of the eigenvalues of magnetic polarizability for the different classes of objects do not overlap establishes an upper bound on discrimination. For various reasons, the eigenvalues cannot always be accurately determined using data collected above a buried target. This tends to increase the overlap of the distributions, and hence degrade discrimination performance.

Paper Details

Date Published: 6 July 2000
PDF: 10 pages
Proc. SPIE 4129, Subsurface Sensing Technologies and Applications II, (6 July 2000); doi: 10.1117/12.390608
Show Author Affiliations
Thomas H. Bell, AETC, Inc. (United States)
Bruce J. Barrow, AETC, Inc. (United States)
Jonathan M. Miller, AETC, Inc. (United States)

Published in SPIE Proceedings Vol. 4129:
Subsurface Sensing Technologies and Applications II
Cam Nguyen, Editor(s)

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