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Distributed Strain Sensing Fiber Optic Cable Based on Ultra-Weak Fiber Bragg Gratings
Abstract
A distributed strain sensing fiber optic cable based on FRP encapsulation for UW-FBG arrays is proposed. The cable addresses low transfer efficiency, strain dead zones, and chirping issues. The ultra-weak fiber grating array with 0.2m pitch was hot-pultruded with glass fiber to make a 1.0mm FRP sensing fiber. Tensile tests show strain transfer efficiency >99.0%, repeatability error <1.49%, and linearity >0.999.
Specifications
- Strain Transfer Efficiency: >99.0%
- Repeatability Error: <1.49%
- Linearity: >0.999
- Grating Pitch: 0.2m
- FRP Diameter: 1.0mm
Authors
L. Chen, Y.-L. Xiong, Z.-H. Luo, et al. — Hubei Engineering Research Center of Weak Magnetic-field Detection, China Three Gorges University
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