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The Impact of the Synchronization between Infrared Camera and Excitation Source on the Quality of Defect Detection in Lock-in Thermography Measurements

The aim of the paper is to study the effect of the synchronization between the excitation source and the thermographic camera on the post-processing results (amplitude and phase contrast) in lock-in thermography. A simulation study of one-dimensional temperature signal models was performed. An electronic module has been developed, allowing changing the phase of the frame capturing signal. The study was performed using a prepared experimental specimen. The results for a different phase of the frame capturing signal are presented.