Research on the FBG strain gauge used for the safety monitoring of high temperature pressure pipes

Qing-mu Cai; Yue-ming Liu; Zheng-yan He; Zhong-you Chen; Chang-qing Huang; Jun Lou; Wei-jian Tian

doi:10.1117/12.973666

15 October 2012 Research on the FBG strain gauge used for the safety monitoring of high-temperature pressure pipes

Qing-mu Cai, Yue-ming Liu, Zheng-yan He, Zhong-you Chen, Chang-qing Huang, Jun Lou, Wei-jian Tian

Proceedings Volume 8418, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Smart Structures, Micro- and Nano-Optical Devices, and Systems; 84181M (2012) https://doi.org/10.1117/12.973666
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

Abstract

High temperature pressure pipes were widely used in the chemical, oil companies and power plants, but the pipe burst incidents occurred from time to time, which had caused some damages on people’s lives and property. Thus, in this paper, with the aim to solve this problem, a FBG (FBG: Fiber Bragg Grating) strain gauge structure which consists of three FBGs is designed and fabricated based on the theoretical strain and stress analysis. The strain gauge can be used for the real-time surface strain monitoring of high temperature pressure pipes. In the strain gauge, the elastic hightemperature alloy(10MoWVNb) is chosen as the substrate. The three FBGs with a similar performance are fabricated on the substrate with the high-temperature glue. Among the three FBGs, FBG1 is used for the horizontal strain sensing of high temperature pressure pipes., FBG2 is used for the longitudinal strain of high temperature pressure pipes, and FGB3 is used for temperature compensation. The strain gauge has a feature of high temperature resistance, temperature compensation and two-dimensional strain measurement. The experiment result shows that : the sensing ranges of temperature is 0~300°C, the transverse strain sensitivity is 1.110nm/με, the temperature sensitivity is 0.0213nm/°C; The longitudinal strain sensitivity is 1.104nm/με, the temperature sensitivity is 0.0212nm/°C; the temperature sensitivity is 0.0103nm/°C. Therefore, the strain gauge can meet the needs of the high temperature and pressure pipes.

Citation Download Citation

Qing-mu Cai, Yue-ming Liu, Zheng-yan He, Zhong-you Chen, Chang-qing Huang, Jun Lou, and Wei-jian Tian "Research on the FBG strain gauge used for the safety monitoring of high-temperature pressure pipes", Proc. SPIE 8418, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Smart Structures, Micro- and Nano-Optical Devices, and Systems, 84181M (15 October 2012); https://doi.org/10.1117/12.973666

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KEYWORDS

Fiber Bragg gratings

Temperature metrology

Resistance

Safety

Sensors

Reflection

Stress analysis

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