Method for calibrating and enhancing flaw detection of an...

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive

Reexamination Certificate

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C250S341100

Reexamination Certificate

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07064331

ABSTRACT:
A method and apparatus for calibrating an acoustic thermography system10and/or enhancing the flaw detection abilities of such a system is provided. The method allows applying a material (e.g.,103) to a specimen12undergoing acoustic thermography inspection. The material is thermally responsive to acoustic energy transmitted to the specimen by the acoustic thermography system. In one aspect thereof, a thermal response of the material applied to the specimen when subjected to acoustic energy is processed to determine whether the level of acoustic energy applied by the acoustic thermographic system appropriately meets a desired amount of acoustic energy for inspecting the specimen. In another aspect thereof, the thermal response of the specimen in combination with the applied material may be processed to determine whether certain types of flaws (e.g., relatively wide flaws) are actually present in the specimen or to enhance the detectability of other flaws that would only faintly show up on the infrared images.

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