温度不敏感光纤光栅压强传感器

Fiber Bragg grating pressure sensor insensitive to temperature

提出了一种新颖的高灵敏度温度不敏感光纤光栅压强传感器。该传感器主要由开口环传感机构和铝箔管组成,根据光纤布拉格光栅带宽调谐原理,首次采用开口环机构和利用带宽编码技术,实现了温度不敏感压强感测。实验结果表明:该传感器在低压范围内具有很高的压强传感灵敏度系数,可达2.50×103nm/M Pa,实验结果与理论分析基本相符。通过选择不同材料的开口环和铝箔管的材料以及改变其结构参数,可灵活设计并调节压强传感灵敏度系数及压强感测范围。

A novel high-sensitivity fiber Bragg grating （FBG） pressure sensor was designed, which was mainly composed of the setup of the opening loop and the aluminum-foil pipe. With the opening loop mechanism and the bandwidth code incorporated, the pressure sensor based on the bandwidth tuning principle of FBG is implemented for the temperature-independent pressure measurement. The experimental results indicate that the sensor is very sensitive to pressure, which is up to 2. 50×10^3 nm/MPa, and the experimental results agree with the theoretical analysis. The pressure sensitivity and measurement range can be designed and altered by changing the material and parameter of the opening loop and aluminum-foil pipe.