差分法在FBG测温系统中的应用  

Application of difference method in FBG temperature measurement system

作　　者：刘赟[1] 徐子奇[1] 王波 刘智超[1,3] 

机构地区：[1]长春理工大学光电信息学院光电工程分院,吉林长春130000 [2]长春禹衡光学有限公司,吉林长春130000 [3]长春理工大学光电工程学院,吉林长春130000

出　　处：《传感器与微系统》2016年第11期151-153,共3页Transducer and Microsystem Technologies

基　　金：吉林省教育厅"十二五"科学技术研究规划项目(吉教科[2014]B060);吉林省教育厅"十二五"科学技术研究规划项目([2015]580号)

摘　　要：为了提高系统的稳定性和抗干扰能力,将差分法应用于光纤Bragg光栅（FBG）测温系统中。给出了相应的理论计算,列出了差分补偿算法的步骤。实验针对25.0~75.0℃的温度测试范围进行检测,结果显示,回波信号对应的中心波长与温差的变化关系基本符合：每1.0℃得到0.04 nm的偏移。采用差分型测温系统的系统误差低于0.5%,比单FBG的精度高4倍左右。具有更好的稳定性与抗干扰能力。In order to improve stability and anti-jamming capability of system,differential method is applied to FBG temperature measurement system. The corresponding theoretical calculation is given,list steps of differential compensation algorithm. Experimental test temperature range 25. 0~ 75. 0 ℃,the results show that the relationship between changes in echo signal corresponding to temperature difference between center wavelength of the fundamental accord that each 1. 0 ℃ get 0. 04 nm shift. System error of differential temperature measurement system type is less than 0. 5 %,precision is about 4 times higher than single FBG. Thus,temperature measurement system based on differential has better stability and anti-jamming capability.

关 键 词：光纤光栅 温度检测 差分法 误差 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]