一种新颖的光纤Bragg光栅小电流传感器设计

Design of Small Electric Current Sensor with Fiber Bragg Grating

利用光纤Bragg光栅的应变传感原理设计了一种新颖的小电流传感器,通过检测光栅反射峰峰值波长的位移来实现小电流的检测。实验结果表明,室温下检测电流在10mA^10A范围内时,传感曲线具有良好的线性,且测量值与理论值较吻合。与微弯效应光纤电流传感器相比,该方案具有更好的稳定性和较高的精度。

A new fiber Bragg grating（FBG） sensor is designed,which makes use of the strain effect to measure small electric current. With testing the peak wavelength displacement of FBG, small electric current can be measured. At room temperature the experiment result indicates that the sensor system has good sensing linearity and experimental data dowers with theoretical data fairly in 10 mA-10 A range. Also,the sensor system shows better stability and higher accuracy in comparison with intensity modulated optical current sensor with tiny bend effect.