Dual-band infrared imaging applications: locating buried minefields, mapping sea ice and inspecting aging aircraft

We discuss the use of dual-band infrared (DBIR) imaging for three quantitative NDE applications: locating buried surrogate mines, mapping sea ice thicknesses and inspecting subsurface flaws in aging aircraft parts. Our system of DBIR imaging offers a unique combination of thermal resolution, detecta...

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Bibliographic Details
Main Authors: Del Grande, Nancy, Durbin, Philip F., Perkins, Dwight E.
Format: Text
Language:English
Published: Iowa State University Digital Repository 1993
Subjects:
Aeronautical Vehicles
Heat Transfer
Combustion
Structures and Materials
Thermodynamics
Sea ice
Online Access:https://lib.dr.iastate.edu/qnde/1993/allcontent/60
https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1297&context=qnde
Description
Summary:We discuss the use of dual-band infrared (DBIR) imaging for three quantitative NDE applications: locating buried surrogate mines, mapping sea ice thicknesses and inspecting subsurface flaws in aging aircraft parts. Our system of DBIR imaging offers a unique combination of thermal resolution, detectability, and interpretability. Pioneered at Lawrence Livermore Laboratory, it resolves 0.2 °C differences in surface temperatures needed to identify buried mine sites and distinguish them from surface features. It produces both surface temperature and emissivity-ratio images of sea ice, needed to accurately map ice thicknesses (e.g., by first removing clutter due to snow and surface roughness effects). The DBIR imaging technique depicts subsurface flaws in composite patches and lap joints of aircraft, thus providing a needed tool for aging aircraft inspections.

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