WEN QINGZHEN1, ZHU JINHUA1, LI GUINIAN2, et al. The Experimental Study and Structural Design of Fiber Grating Pressure Sensor for Pressure Sensitivity Enhancement. [J]. 2012, 58(5): 411-414.
WEN QINGZHEN1, ZHU JINHUA1, LI GUINIAN2, et al. The Experimental Study and Structural Design of Fiber Grating Pressure Sensor for Pressure Sensitivity Enhancement. [J]. 2012, 58(5): 411-414. DOI: 10.14188/j.1671-8836.2012.05.006.
Based on effect of FBG stress sensitivity enhancement by encapsulating the FBG with polymer and metal cylinder
a novel high-sensitivity FBG pressure sensor structure was designed and its mathematical model for calculating the pressure sensitivity was established.The experimental pressure sensitivity coefficient of the sensor(Kp) is-5.02×10-3/MPa
which is 1 800 times of that of the bare FBG.The pressure sensitivity coefficient can be enhanced by properly selecting the size of metal cylinder and the parameters of the polymer such as the Yong’ modulus and Poisson’ ratio.