Terahertz identification of inclusion defects in hot melt joint of polyethylene pipe

Jisheng Xu; Jiaojiao Ren; Dandan Zhang; Wentong Liu

doi:10.1117/12.2661653

12 April 2023 Terahertz identification of inclusion defects in hot melt joint of polyethylene pipe

Jisheng Xu, Jiaojiao Ren, Dandan Zhang, Wentong Liu

Proceedings Volume 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022); 125650R (2023) https://doi.org/10.1117/12.2661653
Event: Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 2022, Shanghai, China

Abstract

The reflective pulsed terahertz time-domain spectroscopy system with a frequency range of 0.25 ~ 2.5 THz was used to detect the defects of polyethylene pipe hot-melt joints. Using white PE100 plate, normal and inclusion defect samples were made. Through the point-by-point scanning of the terahertz system, the waveform and kurtosis imaging are obtained. According to the difference between the waveform and the image, the presence or absence of defects and the size of defects can be distinguished. The sobel edge detection operator has a good recognition level for defects. The recognition error is below 6.47 %, and the error of metal recognition can reach 3.54%.

Citation Download Citation

Jisheng Xu, Jiaojiao Ren, Dandan Zhang, and Wentong Liu "Terahertz identification of inclusion defects in hot melt joint of polyethylene pipe", Proc. SPIE 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 125650R (12 April 2023); https://doi.org/10.1117/12.2661653

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