啁啾光纤布拉格光栅电流传感器  

A novel current sensor based on chirped-fiber Bragg grating

作　　者：杨淑连[1] 申晋[1] 何建廷[1] 盛翠霞[1] 贾宏燕[1] 魏芹芹[1] 

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255049

出　　处：《光电子．激光》2015年第6期1057-1061,共5页Journal of Optoelectronics·Laser

基　　金：山东省自然科学基金(ZR2014FL027)资助项目

摘　　要：为了测量通电螺线管中的电流,设计了一种基于光纤布拉格光栅（FBG）啁啾效应的电流传感器。磁场中的圆盘形软铁受到通电螺旋管线圈磁场力的作用,引起矩形悬臂梁变形,从而导致粘贴在悬臂梁侧边的FBG的反射光谱带宽发生变化,其大小与电流强度成平方关系。利用光谱分析仪（OSA）,通过检测FBG反射谱带宽的变化量,可以得到被测电流强度的大小。当OSA的分辨率为0.02nm时,测量范围达到了27.1~1 000mA。实验结果表明,FBG反射光谱带宽的变化量对温度变化不敏感,当温度从-15℃变化到45℃时,3dB带宽的最大变化约为5pm。实验结果和理论分析一致,表明本文该方案切实可行。To measure the current in the solenoid, a novel current sensor based on the chirped effect of fiber Bragg grating （FBG） is proposed. The deformation of the rectangular cantilever beam is caused by the magnetic force from energized solenoid,on the disc-shaped soft iron and it results in the bandwidth change of the reflection spectrum of FBG that is mounted at side of the cantilever. The change of bandwidth of the reflection spectrum of FBG is directly proportional to the square of the current intensity. The change of bandwidth is insensitive to temperature in the system. When the optical spectrum analyzer is with a resolution of 0. 02 nm,the measuring range of the sensor is up to 27.1-1000 mA. Experimental results show that the 3 dB bandwidth change is less than 5 pm when the temperature changes from -15 ℃ to 45℃. The experimental results are consistent with theoretical results, and the sensor scheme is feasible.

关 键 词：光纤传感器 电流传感器 电流测量 光纤布拉格光栅(FBG) 

分 类 号：TN253[电子电信—物理电子学]