卫星分布式光纤测温系统技术研究  

Study on Distributed Optical Fiber Temperature-Measured System in Satellite

作　　者：吴侃侃[1] 杨牧[1] 陈议[1] 陈德相 魏晓阳 WU Kankan;YANG Mu;CHEN Yi;CHEN Dexiang,;WEI Xiaoyang(Shanghai Institute of Satellite Engineering,Shanghai 201109,China)

机构地区：[1]上海卫星工程研究所,上海201109

出　　处：《上海航天》2018年第1期68-74,共7页Aerospace Shanghai

基　　金：国家自然科学基金(61671305)

摘　　要：针对大面积、轻质化、高精度、连续性的测温需求,介绍了基于拉曼散射和光时域反射技术的光纤测温原理。利用光纤散射信号沿光纤长度叠加的特点,提出了采用环绕式布线方式的卫星光纤测温系统设计,可以获取连续分布的温度场。受限于卫星资源,采用沿环绕光纤多点分布的铂电阻代替恒温槽。利用回路式双参考点设计进行在轨实时校准,消除卫星在轨复杂环境因素和光纤损耗的影响。分析结果表明:铂电阻测温误差引起的系统测量误差小于0.1℃,可以满足卫星使用要求。In view of the large area,light weight,high accuracy,and continuous temperature measurement requirements,we discuss the fiber temperature-measured theory based on Raman scattering and optical time domain reflection technique.Taking advantage of the characteristics of scattering signal superposition along the fiber length,the surround wiring of fiber temperature-measured system is introduced in satellite,and continuous distribution of temperature field is obtained.Limited by resources in satellite,platinum resistances with multipoint distributed along surround wiring are substituted for thermostatic bath.The real-time calibration on orbit is realized with a looped double reference temperature design,which eliminates the effect of the complex environment and fiber loss.The analysis shows that the temperature measurement error caused by platinum resistance is less than 0.1℃,and it can satisfy the satellite application requirements.

关 键 词：光纤测温 拉曼散射 光时域反射技术 实时校准 双参考点 环绕布线 铂电阻 测温精度 

分 类 号：V443[航空宇航科学与技术—飞行器设计]