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Proceedings Paper

Carbon fiber and void detection using high-frequency electromagnetic induction techniques
Author(s): Benjamin E. Barrowes; John B. Sigman; YinLin Wang; Kevin A. O'Neill; Fridon Shubitidze; Janet Simms; Hollis J. Bennett; Donald E. Yule
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Paper Abstract

Ultrawide band electromagnetic induction (EMI) instruments have been traditionally used to detect high electric conductivity discrete targets such as metal unexploded ordnance. The frequencies used for this EMI regime have typically been less than 100 kHz. To detect intermediate conductivity objects like carbon fiber, even less conductive saturated salts, and even voids embedded in conducting soils, higher frequencies up to the low megahertz range are required in order to capture characteristic responses. To predict EMI phenomena at frequencies up to 15 MHz, we first modeled the response of intermediate conductivity targets using a rigorous, first-principles approach, the Method of Auxiliary Sources. A newly fabricated benchtop high-frequency electromagnetic induction instrument produced EMI data at frequencies up to that same high limit. Modeled and measured characteristic relaxation signatures compare favorably and indicate new sensing possibilities in a variety of scenarios.

Paper Details

Date Published: 3 May 2016
PDF: 10 pages
Proc. SPIE 9823, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXI, 98230D (3 May 2016); doi: 10.1117/12.2224584
Show Author Affiliations
Benjamin E. Barrowes, U.S. Army Engineer Research and Development Ctr. (United States)
Thayer School of Engineering at Dartmouth (United States)
John B. Sigman, Thayer School of Engineering at Dartmouth (United States)
YinLin Wang, Thayer School of Engineering at Dartmouth (United States)
Kevin A. O'Neill, Thayer School of Engineering at Dartmouth (United States)
Fridon Shubitidze, Thayer School of Engineering at Dartmouth (United States)
Janet Simms, U.S. Army Engineer Research and Development Ctr. (United States)
Hollis J. Bennett, U.S. Army Engineer Research and Development Ctr. (United States)
Donald E. Yule, U.S. Army Engineer Research and Development Ctr. (United States)


Published in SPIE Proceedings Vol. 9823:
Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXI
Steven S. Bishop; Jason C. Isaacs, Editor(s)

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