Distributed strain sensing cable based on ultra-weak fiber grating

Jianglou Huang; Yunrui He; Xiaolong Wang; Changyan Ran; Huiling He; Zhihui Luo

doi:10.1117/12.3007770

18 December 2023 Distributed strain sensing cable based on ultra-weak fiber grating

Jianglou Huang, Yunrui He, Xiaolong Wang, Changyan Ran, Huiling He, Zhihui Luo

Proceedings Volume 12968, AOPC 2023: Optic Fiber Gyro ; 129681O (2023) https://doi.org/10.1117/12.3007770
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

Aiming at improving the performance of distributed sensing fiber, a distributed strain sensing optical cable based on ultra-weak fiber gratings is proposed. The optical cable is prepared by pretreating an ultra-weak fiber grating array with a pitch of 0.2 m, compounding it with glass fiber to make an FRP sensing fiber with a diameter of 1.0 mm, and then twisting with a steel cable and extruding the sheath. The multilayer structure strain transfer model of steel cable-FRP-optical fiber is established, and the temperature characteristics of the optical cable were tested by the water bath method, the tensile test of the optical cable was carried out by the tensile machine. The results show that the temperature sensitivity of the optical cable is 23.8 pm/°C, the strain sensitivity is 1.72 pm/N, there is no "strain dead zone" during strain tension, and the strain transfer effect is good, which provides a potential solution for high-resolution distributed strain sensing.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jianglou Huang, Yunrui He, Xiaolong Wang, Changyan Ran, Huiling He, and Zhihui Luo "Distributed strain sensing cable based on ultra-weak fiber grating", Proc. SPIE 12968, AOPC 2023: Optic Fiber Gyro , 129681O (18 December 2023); https://doi.org/10.1117/12.3007770

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KEYWORDS

Optical fiber cables

Optical gratings

Sensors

Fiber Bragg gratings

Optical fibers

Sensing systems

Optical sensing

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