双光纤布拉格光栅电流传感器  

A Novel Current Sensor Based on a Couple of Fiber Bragg Gratings

作　　者：陈钦生[1] 杨淑连[2] 

机构地区：[1]山东理工大学物理与光电信息技术学院,山东淄博255049 [2]山东理工大学电气与电子工程学院,山东淄博255049

出　　处：《应用激光》2007年第4期338-341,共4页Applied Laser

基　　金：山东理工大学科技基金(2005KJM27)

摘　　要：两电流产生的电磁力使等腰三角形悬臂梁变形,从而导致安装在悬臂梁两边的光纤布拉格光栅的布拉格波长漂移。通过检测两个布拉格光栅的波长漂移差,得到被测电流。双光纤布拉格光栅通过补偿温度效应,解决了光纤布拉格光栅传感器的交叉敏感问题。垂直放置的等腰三角形悬臂梁,确保光纤光栅在传感过程中不出现啁啾现象,又避免了自身重量和导线重量对测量结果的影响,从而减少了测量误差。该系统传感灵敏度为0.097nm/A,与理论值的相对误差为3.38%,结果表明该传感器结构是可行的。The distortion of an isosceles triangle cantilever structure that is resulted from an electromagnetic force created by the two currents, and it results in the wavelength shift of a couple of fiber Bragg gratings （FBGs） are mounted at either side of the cantilever. By monitoring the wavelength shift difference of the two FBGs, the current can be obtained. The cross sensitive problem of the FBGs sensor can be solved by compensating the temperature effect. The isosceles triangle cantilever structure uprightly mounted avoids the chirp and the effects of its weight and the weight of the wire that the current through it. Hence, the error is reduced. The measurement sensitivity is 0. 097nm/A, the relative error is 3. 38%. The experimental results verify the feasibility of the proposed sensor.

关 键 词：光纤传感器 电流传感器 电流测量 光纤布拉格光栅 

分 类 号：TP274.5[自动化与计算机技术—检测技术与自动化装置]