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Title: Active magnetic sensing for subterranean urban target discrimination
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.  more » « less
Award ID(s):
1647095
PAR ID:
10207230
Author(s) / Creator(s):
; ; ; ;
Editor(s):
Shull, Peter J.; Yu, Tzu-Yang; Gyekenyesi, Andrew L.; Wu, H. Felix
Date Published:
Journal Name:
SPIE Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation IX
Volume:
11380
Page Range / eLocation ID:
5
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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