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Proceedings Paper

Thermal inertia contrast detection of subsurface structures
Author(s): N. Kerr Del Grande
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Paper Abstract

A novel dual-band infrared computed tomography method is described. It applies thermal inertia imaging to detect temporal heat flows from naturally-heated underground or faulty structures. The added values over earlier methods are the use of a temperature simulation model and clutter removal algorithms. They save time, clarify interpretation and specify the subsurface object location, orientation, depth, height (or thickness) and volume. Previous methods incorporated in the methodology successfully viewed a 6-60 m deep aquifer, a 1/10 m3 bridge-deck rut and a 1-15 m deep rock-covered drain. Temporal heat flows were viewed from mobile platforms 3 m to 3 km above ground. Emissivity-corrected thermal survey data agreed with 1-2 m deep thermal-probe and 6-60 m deep thermal-gradient data.

Paper Details

Date Published: 22 April 2009
PDF: 7 pages
Proc. SPIE 7299, Thermosense XXXI, 72990D (22 April 2009); doi: 10.1117/12.829407
Show Author Affiliations
N. Kerr Del Grande, Geo-Temp Corp. (United States)

Published in SPIE Proceedings Vol. 7299:
Thermosense XXXI
Douglas D. Burleigh; Ralph B. Dinwiddie, Editor(s)

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