Active magnetic sensing for subterranean urban target discrimination

Wilson Ezequelle; Daniel Orfeo; Dylan Burns; Tian Xia; Dryver Huston

doi:10.1117/12.2561554

23 April 2020 Active magnetic sensing for subterranean urban target discrimination

Wilson Ezequelle, Daniel Orfeo, Dylan Burns, Tian Xia, Dryver Huston

Proceedings Volume 11380, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIV; 1138006 (2020) https://doi.org/10.1117/12.2561554
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only

Abstract

Location and identification of subterranean infrastructure is crucial for managing and maintaining urban infrastructure and utility, and locating subsurface hazards. Low-frequency oscillating magnetic fields suffer less attenuation due to propagating media than ground penetrating radar. Here, electronically-geared, rotating neodymium magnets project oscillating magnetic fields which are manipulated to provide object identification from rapid analysis of dynamic magnetometer data. Ferromagnetic materials interact directly with the rotating magnetic field. Eddy currents, which induce a counter-propagating magnetic field, are generated in conductive, non-ferromagnetic materials. Two applications are highlighted by preliminary experiments: discrimination between copper, aluminum and steel pipes, and improved detection of buried explosive devices.

Conference Presentation

Citation Download Citation

Wilson Ezequelle, Daniel Orfeo, Dylan Burns, Tian Xia, and Dryver Huston "Active magnetic sensing for subterranean urban target discrimination", Proc. SPIE 11380, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIV, 1138006 (23 April 2020); https://doi.org/10.1117/12.2561554

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