Pulse Phase Thermography 

PPTPulse Phase Thermography is another technique of active thermography, which combines the benefits of pulse thermography (PT) and lock-in thermography (LT). A short duration, high-power pulse is applied to the component. The temperature profile of each pixel is analysed using a Fourier transform, which allows the phase information to be extracted and a phase image to be generated. The phase image is less sensitive to surface emissivity and non-linear heating than the amplitude image. However, because the PPT uses a transient heat field, the phase image quality is not as good as that in LT, which uses a steady-state heat field.

For information on an application of PPT see:

Also search using ‘Pulse Phase Thermography R C Waugh’ for a PowerPoint poster of PPT on the southampton.ac.uk website.

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