Forced-diffusion thermography technique and projector design
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A thermal projector design is discussed as implemented to perform forced diffusion thermography. The system projects a continuous dynamic pattern of heat in order to drive thermal conduction across flaws. The simple projector utilizes a conventional 625 watt incandescent source and a servo-controlled mirror system to create a simple moving line pattern of heat. Although the system is capable of detecting a variety of flaws, it is most suited for crack detection. Projector design and results are presented.
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