基于拉曼散射原理的分布式光纤测温系统研究

Research of Distributed Optical Fiber Temperature Measurement System Based on Raman Scattering Principle

在研究拉曼散射原理及其应用技术的基础上,开发了一种分布式结构的光纤测温系统。通过对光纤的拉曼散射光谱信息进行解调处理,实现了全光纤的分布式温度检测。系统达到的温度分辨率为0.3℃,空间分辨率为3m,最大测量距离为6 000m。相关的实验室和野外试验结果表明,该系统的主要性能指标能够满足实际工程的使用要求。

Based on studying Raman scattering principle and its application technology, a distributed optical fiber temperature measurement system is developed. The system implements distributed temperature detection along the sensing fiber by demodulating the optical fiber Raman scattering spectrum. The performance of the system, including the temperature resolution （0.3℃）, the spatial resolution （3m）, as well as the maximum measurement length （6 000 m） can satisfy the practical engineering application requirements both in laboratory and outdoor tests.