A method and equipment for the inspection of composite tubular  specimen by thermography

Dapeng Chen; Jian Zhou; Xiaoheng Wang; Yazhou Zhang

doi:10.1117/12.2562526

17 April 2020 A method and equipment for the inspection of composite tubular specimen by thermography

Dapeng Chen, Jian Zhou, Xiaoheng Wang, Yazhou Zhang

Proceedings Volume 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications; 114551U (2020) https://doi.org/10.1117/12.2562526
Event: Sixth Symposium on Novel Photoelectronic Detection Technology and Application, 2019, Beijing, China

Abstract

It is always a difficult problem for the non-destructive testing of tubular specimen with multi-layer composite structure. Light pulsed thermography was applied on this kind of specimen, but only near surface defects can be detected because of low stimulation power and thermal diffusion. In this paper, a new thermography method for tubular specimen testing is proposed, which the hot and cold water is applied to circulate inside the tubular specimen as a periodic heat stimulation, infrared reflector is also designed to inspect 360 degree of tubular specimen at one thermography. Typical composite tubular specimen with embedded defects are detected by this method and device. The results of the thermal images show that it is an effective method for the testing of composite tubular specimen. Furthermore, data processing is discussed because of the periodic stimulation, time-frequency transformation can be applied to the thermal image sequence to get the phase image and improve the detection signal-to-noise ratio.

Citation Download Citation

Dapeng Chen, Jian Zhou, Xiaoheng Wang, and Yazhou Zhang "A method and equipment for the inspection of composite tubular specimen by thermography", Proc. SPIE 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications, 114551U (17 April 2020); https://doi.org/10.1117/12.2562526

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