Intelligent monitoring of substation infrastructure based on fiber Bragg grating flexible sensor

Feng Zhu; Jiyan Li; Weishuai Wang; Guoliang Zhu; Cancan Li; Shanshan Wei; Le Yang

doi:10.1117/12.2668090

6 March 2023 Intelligent monitoring of substation infrastructure based on fiber Bragg grating flexible sensor

Feng Zhu, Jiyan Li, Weishuai Wang, Guoliang Zhu, Cancan Li, Shanshan Wei, Le Yang

Proceedings Volume 12553, Fourth International Conference on Optoelectronic Science and Materials (ICOSM 2022); 125530T (2023) https://doi.org/10.1117/12.2668090
Event: 2022 4th International Conference on Optoelectronic Science and Materials (ICOSM2022), 2022, Henfei, China

Abstract

To reduce the loss caused by uneven settlement of substation foundation buildings, it is urgent to carry out long-term and real-time monitoring of the engineering structure. The FBG (fiber Bragg grating) flexible sensor was fabricated by using the POM (polyoxymethylene) material with waterproof and moisture-proof properties as the flexible substrate, and encapsulating the sensing points in the substrate by means of grooves. Temperature sensing experiments have shown that flexible sensors have good temperature self-compensation properties. In the displacement sensing experiment, the mean absolute errors of Type 1, 2 and 3 were 2.67 mm, 2.77 mm and 6.76 mm, respectively, after the curvature information obtained by the sensing point was corrected by B-spline interpolation. Compared with before correction, the mean absolute errors were reduced by 38.28 mm, 9.94 mm and 28.54 mm, respectively. The mean absolute displacement error percentages of Type 1, 2, and 3 after correction by B-spline interpolation were 1.87%, 5.28%, and 6.98%, respectively, which were 26.83%, 18.94% and 29.49% lower than those before correction. The above has shown that the interpolation algorithm effectively improves the sensing accuracy of the flexible sensor for displacement. The FBG flexible sensor designed in this paper can realize real-time monitoring of substation settlement and provide early warning, which has important application and promotion value.

Citation Download Citation

Feng Zhu, Jiyan Li, Weishuai Wang, Guoliang Zhu, Cancan Li, Shanshan Wei, and Le Yang "Intelligent monitoring of substation infrastructure based on fiber Bragg grating flexible sensor", Proc. SPIE 12553, Fourth International Conference on Optoelectronic Science and Materials (ICOSM 2022), 125530T (6 March 2023); https://doi.org/10.1117/12.2668090

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KEYWORDS

Sensors

Fiber Bragg gratings

Interpolation

Curvature sensing

Engineering

Reconstruction algorithms

Deformation

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