一种利用菲涅尔反射的分布式温度传感系统  

A distributed temperature sensing system using Fresnel reflection

作　　者：张立欣[1,2] 田敏 吕安强[1,2] 刘紫娟 耿豪键 ZHANG Lixin;TIAN Min;LüAnqiang;LIU Zijuan;GENG Haojian(Department of Electronic and Communication Engineer ng,North China Electric Power University,Baoding 071003,China;Hebei Key Laboratory of Power Internet of Things Technology,North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学电子与通信工程系,河北保定071003 [2]华北电力大学电力物联网技术河北省重点实验室,河北保定071003

出　　处：《传感器与微系统》2022年第10期79-81,86,共4页Transducer and Microsystem Technologies

基　　金：河北省自然科学基金资助项目(F2019502112);国家自然科学基金资助项目(52177141);中央高校基本科研业务费专项基金资助项目(2022MS079)。

摘　　要：为了实现对温度的快速测量,采用了一种利用低频信号源进行频率扫描的分布式温度测量系统。搭建了基于菲涅尔反射的分布式光纤温度传感系统,并对系统进行了理论分析和实验验证,得到了分布式光纤温度传感测量系统的温度特性。结果表明:通过测量布里渊增益谱(BGS)获得的布里渊频移(BFS)与温度呈良好的线性关系;由菲涅尔反射分布式光纤温度传感系统获得的BFS的温度系数为1.02 MHz/℃,与传统分布式双端布里渊光时域传感系统的测得值1.20 MHz/℃基本相符,在1.876 km光纤上可实现4.5 m空间分辨率的温度传感测量。In order to achieve rapid measurement of temperature, a distributed temperature measurement system using low-frequency signal sources for frequency scanning is used.The distributed optical fiber temperature sensing system based on Fresnel reflection is built.The theoretical analysis and experimental verification of the temperature sensing system are carried out, and the temperature characteristics of the temperature sensing system are obtained.The experimental results show that the Brillouin frequency shift(BFS) obtained by measuring Brillouin gain spectrum(BGS) has a good linear relationship with temperature, and the temperature coefficient of the BFS obtained by optical fiber temperature sensing system is 1.02 MHz/°C,which is basically consistent with the measured value of 1.20 MHz/℃ of traditional distributed double-ended Brillouin optical time domain sensing system.Finally, the temperature sensing measurement with a spatial resolution of 4.5 m is achieved on a 1.876 km optical fiber.

关 键 词：分布式光纤传感 布里渊光时域分析 菲涅尔反射 温度传感 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]