基于拉曼散射的分布式光纤传感系统真空低温热沉环境温度梯度测量  

Temperature Gradient Measurement in Vacuum Cryogenic Heat Sink Environment of Distributed Fiber Optic Sensing System Based on Raman Scattering

作　　者：李琨华 李成贵[1] 陈娟丽[2] 毕京红[2] 宋娜 武盼 LI Kunhua;LI Chenggui;CHEN Juanli;BI Jinghong;SONG Na;WU Pan(Beihang University,Beijing 100191,China;Beijing North Vehicle Group Co.LTD,Beijing 100072,China)

机构地区：[1]北京航空航天大学,北京100191 [2]北京北方车辆集团有限公司,北京100072

出　　处：《真空与低温》2023年第2期171-179,共9页Vacuum and Cryogenics

基　　金：国家自然科学基金(62073013)。

摘　　要：新型分布式光纤温度传感器具备电类温度传感器所不具有的独特优势,扩展了温度测量在真空低温环境中的应用领域。在真空低温热沉环境下使用分布式光纤温度传感器进行温度梯度测量。传统热电偶温度传感器和分布式光纤温度传感器布置在同一双层铝板结构中,铝板以及传感器放置在真空低温热沉环境中。铝板由加热片进行控温,以实现真空低温热沉环境下不同温度梯度的测量。对两类传感器所测铝板的温度数据进行分析,结果表明,基于拉曼散射原理的分布式光纤温度测量系统能够对真空低温热沉环境下的温度梯度实现精确测量,可以满足低温工况下工件的温度测量。The new distributed optical fiber temperature sensor has unique advantages that electrical temperature sensor does not have. It greatly expands the application field of temperature measurement in vacuum low temperature environment. The distributed optical fiber temperature sensor is applied to measure the temperature gradient in vacuum under the environment of low temperature heat sink. The traditional thermocouple temperature sensor and the distributed optical fiber temperature sensor are placed in the same double aluminum plate structure. The aluminum plate and sensors are placed in vacuum under the environment of low temperature heat sink. Different temperature gradients in vacuum low temperature heat sink environment are realized by heating temperature control of aluminum sheet. The temperature data of aluminum plate measured by two kinds of sensors are analyzed. The results shows that the distributed fiber Raman temperature measurement system can accurately measure the temperature gradient in vacuum low temperature heat sink environment and meet the temperature measurement of workpieces under low temperature conditions.

关 键 词：真空低温环境 拉曼散射 分布式光纤温度测量系统 温度梯度测量 

分 类 号：O514.2[理学—低温物理] V416[理学—物理]