高空间分辨率分布式光纤测温系统的设计及应用

分布式光纤测温系统是一种新型的线型感温探测器,以光纤作为传感器,可实现沿光纤分布的温度实时测量。理论分析了分布式光纤测温系统的原理以及影响空间分辨率指标的因素,并给出了0.5m高空间分辨率分布式光纤测温系统的设计以及测试情况。将高空间分辨率分布式光纤测温系统应用于电缆温度测量,测量结果表明0.5m空间分辨率下对小区域电缆过热点的探测更为显著,可及时发现潜在的火灾隐患。

Design and application of high spatial resolution distributed temperature sensing system

Distributed temperature sensing system is a novel linear-type temperature sensor and the optical fiber is used as temperature sensor. Compared with the conventional technology, distributed temperature sensing system has many advantages, such as continuous measurement, long sensing distance, high location accuracy, anti-electromagnetic interference and so on. The principle of distributed temperature sensing and the factors affecting the spatial resolution are analyzed. The design of 0.5 m spatial resolution distributed temperature sensing system and the test reports are introduced. Also the high spatial resolution distributed temperature sensing system is used for online monitoring the temperature distribution of power cables. The result shows that 0.5 m spatial resolution is more effective for detection of small size hot spots and can more easily identify the potential fire hazard in the early stage.