Carbon fiber and void detection using high-frequency electromagnetic induction techniques

Benjamin E. Barrowes; John B. Sigman; YinLin Wang; Kevin A. O'Neill; Fridon Shubitidze; Janet Simms; Hollis J. Bennett; Donald E. Yule

doi:10.1117/12.2224584

3 May 2016 Carbon fiber and void detection using high-frequency electromagnetic induction techniques

Benjamin E. Barrowes, John B. Sigman, YinLin Wang, Kevin A. O'Neill, Fridon Shubitidze, Janet Simms, Hollis J. Bennett, Donald E. Yule

Author Affiliations +

Proceedings Volume 9823, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXI; 98230D (2016) https://doi.org/10.1117/12.2224584
Event: SPIE Defense + Security, 2016, Baltimore, MD, United States

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.

Citation Download Citation

Benjamin E. Barrowes, John B. Sigman, YinLin Wang, Kevin A. O'Neill, Fridon Shubitidze, Janet Simms, Hollis J. Bennett, and Donald E. Yule "Carbon fiber and void detection using high-frequency electromagnetic induction techniques", Proc. SPIE 9823, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXI, 98230D (3 May 2016); https://doi.org/10.1117/12.2224584

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