Evaluation of dual-band infrared thermography system for bridge deck delamination surveys

Mohammad S. Khan; Glenn A. Washer; Steven B. Chase

doi:10.1117/12.300094

31 March 1998 Evaluation of dual-band infrared thermography system for bridge deck delamination surveys

Mohammad S. Khan, Glenn A. Washer, Steven B. Chase

Proceedings Volume 3400, Structural Materials Technology III: An NDT Conference; (1998) https://doi.org/10.1117/12.300094
Event: Non-Destructive Evaluation Techniques for Aging Infrastructure and Manufacturing, 1998, San Antonio, TX, United States

Abstract

This paper describes the evaluation and improvement of a Dual Band Infrared (DBIR) thermal imaging system developed by Lawrence Livermore National Laboratory (LLNL), under the sponsorship of Federal Highway Administration (FHWA). DBIR thermal imaging system is a nondestructive evaluation technique which has the potential of detecting delaminations in concrete bridge decks, with and without asphalt overlays. The system consist of two infrared scanners, one operating at a wavelength of 3 - 5 micrometer and the other at a wavelength of 8 - 12 micrometers. The scanners are mounted in front of a vehicle and are microprocessor controlled from inside the vehicle. The vehicle is driven at a speed of 40 km/hr and a typical bridge deck can be scanned in less than 5 minutes, with a low level of traffic control.

Citation Download Citation

Mohammad S. Khan, Glenn A. Washer, and Steven B. Chase "Evaluation of dual-band infrared thermography system for bridge deck delamination surveys", Proc. SPIE 3400, Structural Materials Technology III: An NDT Conference, (31 March 1998); https://doi.org/10.1117/12.300094

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