Center for Smart Sensing System, Julong College, Shenzhen Technology University, Shenzhen 518118, China.
Sensors (Basel). 2022 Nov 26;22(23):9188. doi: 10.3390/s22239188.
In this paper, a fiber-optic liquid pressure sensor is designed and developed by encapsulating the fiber Bragg grating (FBG) inside the adjustable double-flange cylinder rigid structure with flexible polymer polydimethylsiloxane (PDMS). Within the elastic deformation range of the PDMS, the proposed adjustable FBG-based liquid pressure sensor is proven to change its measuring range while maintaining high measurement sensitivity by simply adjusting the structure, that is, the sensor can achieve high measurement sensitivity in various liquid levels. In addition, the simulation and experimental results show that the sensor sensitivity can be enhanced by the proper changes of the structural parameters, such as the inner diameter, etc. The proposed sensor has shown that it has good linearity and stability, which provides a new opportunity for the monitoring of liquid pressure in oceans, dams and other environments.
本文设计并研制了一种光纤液体压力传感器，它通过将光纤布拉格光栅（FBG）封装在可调双法兰圆柱刚性结构内，并采用柔性聚合物聚二甲基硅氧烷（PDMS）。在 PDMS 的弹性变形范围内，通过简单地调整结构，证明所提出的基于可调 FBG 的液体压力传感器在保持高测量灵敏度的同时改变其测量范围，即传感器可以在各种液位下实现高测量灵敏度。此外，仿真和实验结果表明，通过适当改变结构参数，如内径等，可以提高传感器的灵敏度。所提出的传感器具有良好的线性度和稳定性，为海洋、大坝等环境中的液体压力监测提供了新的机会。
