基于体相位光栅色散解调的布拉格光纤光栅温度监测  

Optical Fiber Bragg Grating Temperature Monitoring Based on Volume Phase Grating Dispersion Demodulation

作　　者：王彦[1] 赵凯[1] 刘加萍 

机构地区：[1]安徽工业大学电气与信息工程学院,安徽马鞍山243000

出　　处：《激光与光电子学进展》2016年第10期113-118,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(51309001);安徽省教育厅自然科学基金(KJ2013A055)

摘　　要：搭建了基于光纤布拉格光栅分析仪(FBGA)解调模块的光纤光栅温度监测系统,实现了对外界环境的温度监测。利用FBGA中的数字信号处理模块获取反射光的峰值波长,拟合获得峰值波长与温度的关系,采用LabVIEW编写相应的上位机程序。该测量方法精确度较高,与恒温箱温度相比,该系统的温度误差在±0.5℃之内。系统响应时间小于0.5 s,系统监测温度灵敏度约为0.1℃。当置信概率为95.40%时,重复性指标在±0.0210%之内。A fiber grating temperature monitoring system based on the fiber Bragg grating analyzer （FBGA） demodulation module is constructed, and the temperature monitoring for the external environment is realized. The peak wavelength of the reflected light is obtained through the digital signal processing module in FBGA, and the fitting method is used to obtain the relationship between the peak wavelength and the temperature. LabVIEW is used to write the corresponding upper computer program. The measurement accuracy of the proposed measuring method is high. Compared with the constant temperature experiment, the temperature error of the proposed system is within ±0.5℃, the system response time is less than 0.5 s, and the temperature sensitivity of the system is about 0.1℃. When the confidence level is 95.40%, the repeatability index is within ±0. 0210 %.

关 键 词：测量 光纤光栅 解调 数字信号处理 

分 类 号：TN206[电子电信—物理电子学] TH811[机械工程—仪器科学与技术]