20 January 2005 A novel FBG pressure sensor with high sensitivity
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Abstract
A high-sensitivity fiber Bragg grating (FBG) pressure sensor has been designed and studied. Confining some gas inside a glass cylinder with a close glass piston which can move smoothly along the cylinder, and sticking two ends of a fiber Bragg grating on the outer side of the cylinder and piston respectively. The variation of the external pressure results in the change of the tension that the fiber grating is subjected to and then the pressure can be measured by the measurement of the Bragg wavelength of the FBG. The pressure sensitivity coefficient is up to -0.7676/MPa, which is about 3.88×105 times the value of bare fiber Bragg gratings, the highest sensitivity ever reported. The sensor can be used to potential applications in the measurement of air pressure, hydraulic pressure and vibration in the range of low pressure.
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Shiya He, Shiya He, Shuyang Hu, Shuyang Hu, Dawei Tian, Dawei Tian, Kuanxin Yu, Kuanxin Yu, Qida Zhao, Qida Zhao, Jinfeng Zhou, Jinfeng Zhou, Li Wang, Li Wang, } "A novel FBG pressure sensor with high sensitivity", Proc. SPIE 5633, Advanced Materials and Devices for Sensing and Imaging II, (20 January 2005); doi: 10.1117/12.565187; https://doi.org/10.1117/12.565187
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