光纤Bragg光栅电流传感器的温度补偿研究

Research on temperature compensation of fiber Bragg grating current sensor

在基于超磁致伸缩材料Tb0.30Dy0.70Fe1.95的光纤Bragg光栅(FBG)大电流传感器的基础上,通过对传感头进行设计,提出了一种温度补偿的方案,解决了FBG的温度—应变交叉敏感问题,提高了传感器的精度。实验结果表明:在0～90℃的温度变化范围内,该传感器的Bragg波长差与电流变化具有较好的线性度,不受温度变化的影响。表明了该结构能达到温度补偿的效果,解决了交叉敏感的影响,降低了成本。

A novel fiber Bragg grating（FBG） for large current sensor configuration based on GMM is presented.The impact of temperature on GMM and the problem of temperature-strain cross-sensitivity of the sensor is solved.A temperature compensation scheme is designed.The experimental results show that in the range of 0~90 ℃,the relation between the dispersion of two FBGs Bragg wavelengths and current is linear.The result indicates the structure can achieve the effect of temperature compensation and solve the impact of cross-sensitivity and has economical benefits.