Intelligent detection of delamination defect in curved structural quartz fiber reinforced polymer composites using terahertz technology

WANG Qiang; ZHAO Boyan; LIU Qiuhan; LIU Wenquan; GAO Jianguo; ZHANG Pengtao

doi:10.13801/j.cnki.fhclxb.20220516.001

Volume 40 Issue 3

Mar. 2023

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WANG Qiang, ZHAO Boyan, LIU Qiuhan, et al. Intelligent detection of delamination defect in curved structural quartz fiber reinforced polymer composites using terahertz technology[J]. Acta Materiae Compositae Sinica, 2023, 40(3): 1785-1796. doi: 10.13801/j.cnki.fhclxb.20220516.001

Citation:

WANG Qiang, ZHAO Boyan, LIU Qiuhan, et al. Intelligent detection of delamination defect in curved structural quartz fiber reinforced polymer composites using terahertz technology[J]. Acta Materiae Compositae Sinica, 2023, 40(3): 1785-1796. doi: 10.13801/j.cnki.fhclxb.20220516.001

Citation:

WANG Qiang, ZHAO Boyan, LIU Qiuhan, et al. Intelligent detection of delamination defect in curved structural quartz fiber reinforced polymer composites using terahertz technology[J]. Acta Materiae Compositae Sinica, 2023, 40(3): 1785-1796. doi: 10.13801/j.cnki.fhclxb.20220516.001

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Intelligent detection of delamination defect in curved structural quartz fiber reinforced polymer composites using terahertz technology

doi: 10.13801/j.cnki.fhclxb.20220516.001

1.
College of Equipment Management and UAV Engineering, Air Force Engineering University, Xi’an 710051, China
2.
Center for Optoelectronic Technology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China

Received Date: 2022-03-17
Accepted Date: 2022-05-01
Rev Recd Date: 2022-04-21

Available Online: 2022-05-16

Publish Date: 2023-03-15

Abstract

Abstract

In order to explore an intelligent means of detecting delamination defects in airborne warning and control system radomes made of quartz fiber reinforced polymers (QFRP), a reflective terahertz time-domain spectroscopy system based on fiber coupling was built by combining a cooperative robot. The signal noise ratio dynamic range is about 60 dB after testing. Terahertz nondestructive testing of curved structural QFRP sample with pre-buried simulated delamination defects was performed using the build system. The internal pre-buried defects were visually identified in the reflected terahertz images obtained from different scanning areas. An improved YOLOv4 algorithm was used to obtain 90.18% accuracy and 91.26% recall in automatic defect identification, which were 3.37% and 4.01% higher than the original YOLOv4 algorithm, respectively. The small target defects can also be recognized well. This experiment enriches the design and detection of airborne warning and control system radome sample, explores the detection of curved structural QFRP sample using terahertz imaging method and provides a new intelligent nondestructive testing method of airborne warning and control system radomes detection, which has the value of engineering application.
- quartz fiber reinforced polymer,
- curved structure,
- terahertz time-domain spectroscopy,
- damage and defect,
- non-destructive testing
Long Abstrsct
Innovation Points

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References(27)

References

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