压差式FBG传感器静态压力特性实验研究
Research on differential pressure FBG sensor static hydraulic properties
摘要
在分析压差式FBG(光纤布拉格光栅)传感原理的基础上, 采用液压校验仪和Q8384光谱仪对其静态压力传感特性进行了实验研究, 并对实验结果进行了误差分析。实验结果表明, 在0~0.35 MPa的压力范围内, FBG的灵敏系数为3 pm/kPa, 布拉格波长随着压差的变化呈现出良好的线性关系和重复性, 且迟滞现象较小, 可以用于液压系统的流量测量。
Abstract
On the basis of analyzing the sensing principle of differential pressure Fiber Bragg Grating (FBG) sensors, its static differential pressure sensing properties are investigated by using a hydraulic tester and a Q8384 spectrometer and the errors of the experimental results analyzed. The results indicate that the FBG sensibility coefficient is 3 pm/kPa in the pressure range of 0~0.35 MPa and the FBG wavelength varies linearly with the differential pressure with little hysteresis effect, proving that this sensor can be used in hydraulic systems for flow measurement.
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