Thermal inertia contrast detection of subsurface structures

N. Kerr Del Grande

doi:10.1117/12.829407

22 April 2009 Thermal inertia contrast detection of subsurface structures

N. Kerr Del Grande

Proceedings Volume 7299, Thermosense XXXI; 72990D (2009) https://doi.org/10.1117/12.829407
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

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.

Citation Download Citation

N. Kerr Del Grande "Thermal inertia contrast detection of subsurface structures", Proc. SPIE 7299, Thermosense XXXI, 72990D (22 April 2009); https://doi.org/10.1117/12.829407

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