Thermal measuring and testing – Thermal testing of a nonthermal quantity – With loading of specimen
Reexamination Certificate
2006-08-01
2006-08-01
Verbitsky, Gail (Department: 2859)
Thermal measuring and testing
Thermal testing of a nonthermal quantity
With loading of specimen
C374S005000, C374S057000, C374S124000, C073S15000R, C702S034000, C702S040000
Reexamination Certificate
active
07083327
ABSTRACT:
A active thermographic method for detecting subsurface defects in a specimen, particularly kissing unbond defects, includes heating a specimen, applying a force to the surface of the specimen to shift and separate the walls of the defect, and obtaining thermographic images of the specimen over time to monitor the heat flow through the specimen and detect thermal discontinuities. Because kissing unbond defects normally have good physical contact, and therefore good thermal conductivity, between its walls, these defects can go undetected in conventional active thermographic methods. By distorting the surface of the specimen, the kissing unbond defect is enlarged enough to generate sufficient thermal contrast for the defect to appear in the thermographic images.
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Honigman Miller Schwartz and Cohn LLP
Thermal Wave Imaging, Inc.
Verbitsky Gail
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