Nondestructive testing: transient depth thermography

Details Nondestructive testing: transient depth thermography Nondestructive testing: transient depth thermography

1996-10-30

1998-01-27

Bennett, G. Bradley

Thermal measuring and testing

Leak or flaw detection

With heating or cooling of specimen for test

374124, 364507, G01N 2572

Patent

active

057116032

ABSTRACT:
The present invention relates to transient depth thermography; a nondestructive testing technique and system for locating flaws within an object. The system, which comprises a heater for heating the surface of the object; a recorder for recording pixel intensity for each pixel on the heated surface; a means for determining pixel contrast from the pixel intensity; and a means for determining the size and location of flaws within the object based upon the pixel contrast; monitors each pixels' contrast for successive thermal images and utilizes those pixel contrasts determining the location of a flaw within the object. The object surface and the respective underlying flaws can then be depicted on a color spectrum image print which correlates the flaw depth with a particular color.

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Vladimir P. Vavilov et al. "Thermal Characterization and Tomography of Carbon Fiber Reinforced Plastics Using Individual Identification Technique", Materials Evaluation, May 1996 vol. 54, No. 5, pp. 604-610.

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