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阐述了基于背向拉曼散射和光时域反射技术的分布式光纤测温系统的基本原理、系统组成、温度解调方法和实验数据及其分析。分布式光纤测温系统由测温主机、感温光纤和温度解调软件组成。它具有成本低廉、灵敏度高、可靠性好、本质安全、连续分布式测量等特点。实验数据表明:该系统测温精度高、定位准确。
The basic principle, system composition, temperature demodulation method and experimental data of distributed optical fiber temperature measurement system based on back-Raman scattering and optical time-domain reflectometry are described. Distributed optical fiber temperature measurement system consists of temperature measurement host, temperature fiber and temperature demodulation software. It has the characteristics of low cost, high sensitivity, good reliability, intrinsic safety and continuous distributed measurement. Experimental data show that: The system temperature measurement accuracy, accurate positioning.