High frequency EMI sensing for detection and location of underground metallic utilities

Sven D. Isaacson; Caylin A. Hartshorn; Benjamin E. Barrowes; Fridon Shubitidze

doi:10.1117/12.2588033

12 April 2021 High frequency EMI sensing for detection and location of underground metallic utilities

Sven D. Isaacson, Caylin A. Hartshorn, Benjamin E. Barrowes, Fridon Shubitidze

Proceedings Volume 11750, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXVI; 1175003 (2021) https://doi.org/10.1117/12.2588033
Event: SPIE Defense + Commercial Sensing, 2021, Online Only

Abstract

Detecting and locating underground metallic and non-metallic pipes and utilities remains a pressing problem for the US Department of Energy. Old and deteriorating pipes pose a public safety and environmental hazard but often can be difficult to locate due to poor mapping or broken tracing wires. Many geophysical sensing techniques have been applied to the problem, including: acoustic methods, ground penetrating radar, passive magnetic fields, and low frequency electromagnetic fields – each with its own advantages and pitfalls. This paper investigates a new technique for detecting subsurface pipes: high frequency electromagnetic induction (HFEMI) sensing. Utilizing a frequency range of 10 kHz – 15 MHz, HFEMI has been used successfully in the past for detecting and locating low-conducting subsurface targets such as improvised explosive devices (IED). In this paper, we show HFEMI can be used to induce a linear current in a target pipe which produces a secondary electromagnetic field that can be detected by an above-ground magnetic field receiver. Comparisons between numerical and experimental studies are presented for subsurface elongated conductors. The data is inverted and then validated against ground truth.

Conference Presentation

Citation Download Citation

Sven D. Isaacson, Caylin A. Hartshorn, Benjamin E. Barrowes, and Fridon Shubitidze "High frequency EMI sensing for detection and location of underground metallic utilities", Proc. SPIE 11750, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXVI, 1175003 (12 April 2021); https://doi.org/10.1117/12.2588033

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