6 April 1993 Evaluation of a prototype thermal wave imaging system for nondestructive evaluation of composite and aluminum aerospace structures
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Abstract
Several issues must be resolved before confidence in infrared thermography nondestructive evaluation (NDE) approaches that of more established NDE methodologies. Foremost among these are system sensitivity, repeatability, and interpretation of results. In recent years, synchronous imaging techniques have been demonstrated using a computer to control the thermal excitation, infrared image acquisition, and image processing. Advantages include simplified system setup and operation, repeatable measurements, and signal-to-noise ratio enhancement. In late 1991, LASC began a beta-site evaluation of a prototype Thermal Wave Imaging (TWI) system developed by the Institute for Manufacturing Research at Wayne State Univ. (Detroit, MI). This prototype is the forerunner of a production version currently under development for commercial offering as a fully integrated thermal NDE system. Applications will include quality assurance of manufactured aerospace composite structures and inspection for first and second-layer corrosion in aluminum (aging) aircraft structures. This paper describes the prototype system, and discusses results of specific experiments selected to demonstrate present capabilities of the system.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
John J. Selman, John J. Selman, J. Ted Miller, J. Ted Miller, } "Evaluation of a prototype thermal wave imaging system for nondestructive evaluation of composite and aluminum aerospace structures", Proc. SPIE 1933, Thermosense XV: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (6 April 1993); doi: 10.1117/12.141967; https://doi.org/10.1117/12.141967
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