光纤布拉格光栅
灵敏度(控制系统)
材料科学
飞秒
光学
光纤传感器
压力传感器
光纤
磷
光电子学
保偏光纤
物理
激光器
电子工程
工程类
热力学
作者
Junhao Jing,Yongxing Guo,Tao Wang,Wanhuan Zhou
出处
期刊:IEEE Sensors Journal
[Institute of Electrical and Electronics Engineers]
日期:2024-05-15
卷期号:24 (10): 16102-16112
被引量:1
标识
DOI:10.1109/jsen.2024.3369334
摘要
This paper introduces an ocean pressure sensor characterized by its heightened sensitivity, employing an elastic diaphragm coupled with femtosecond fiber Bragg grating (FS-FBG) technology. The sensor securely embeds a high tensile strength femtosecond fiber Bragg grating (FS-FBG) at the center of an elastic diaphragm and seals it within a sealed chamber, allowing for precise temperature compensation using an additional FBG. This approach effectively prevents chirping phenomena caused by FBG attachment to the diaphragm surface and resolves sensitivity issues associated with metal encasement. The paper elucidates and derives the principles of membrane stress deformation based on elasticity mechanics, establishing a linear relationship between the wavelength shift of the fiber Bragg grating and pressure values. Sensitivity analysis of the sensor is conducted, and the sensor's design structure can further amplify the measurement range and sensitivity by adjusting geometric dimensions and mechanical parameters. Feasibility is verified through finite element simulations and experiments. The sensor fabricated in this study exhibits a sensitivity of 14.66 pm/kPa and achieves a resolution of 0.05 kPa, a fitting coefficient of 0.9999, and a repeatability error of 0.0052% within the pressure range of 0-600 kPa. This provides an advanced and efficient means for high-precision monitoring of seawater pressure.
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