分布式光纤测温技术综述

Performance analysis of distributed fiber sensing technology

光纤传感器以其独特的优点得到了人们的普遍关注,尤其分布式光纤传感技术在土木工程等大范围测量领域成为研究热点。通过对目前分布式光纤测温技术的系统论述,提出了分布式光纤测温技术的两个研究方向:基于光纤后向散射的光时域及频域反射技术的分布式光纤测温和基于光复用技术的光纤光栅分布式测温。通过对分布式光纤测温技术两个方向的工作原理、特点及性能的理论分析及仿真实验,综合论述和分析了分布式光纤测温技术两个方向的优点和缺陷,以及在具体工程中的实际应用。

In recent years, fiber optic sensor has become a focus of concern due to its unique advantages. Distributed optical fiber sensing technology, in particular, has become a hot topic in large-sphere measurement field, such as civil engineering. The development of research of optical fiber temperature measurement technology is systematically discussed. Currently, there are two major research directions of distributed optic fiber temperature sensor technology： namely, the distributed fiber sensors of time domain and frequency domain reflection technology based on the optic fiber backscattering and the distributed fiber grating sensors based on optical multiplexing technology. Through theoretical analysis and simulation of the working principle, characteristics and performance of the two types of distributed optical fiber temperature measurement systems, the advantages and disadvantages of distributed optical fiber temperature measurement technology in both directions and their practical application in specific project are comprehensively discussed and analysed.