提高分布式光纤温度传感器测量准确性的方法

The Method of Improving the Temperature Measuring Accuracy of Distributed Optical Fiber Temperature Sensor

分布式光纤温度传感技术是近年来发展起来的一种新型传感技术，它利用一根光导纤维作为温度信息的传感和传导介质，可以测量整个光纤长度上的温度情况。这在解决大型重要结构的实时监控、准确测量等问题以及在组成智能材料结构等方面具有重要价值和应用潜力。本文对基于反斯托克斯／斯托克斯比值的分布式光纤温度传感器系统的温度计算方法和定标进行了理论分析，并提出了采用计算方法消除两路测量通道的损耗系数差异对温度测量的影响。

Distributed optical fiber temperature sensing technique is one of the recent de-veloped sensory technique. It takes a single optic fiber as both sensing and transmitting medi-um for temperature in formation,the spatial distribution and the temporal variation of temper-ature along the whole optical fiber can be measured. It is important for real-time temperature monitoring of heavy-duty equipment and smart civil structure. In this paper,the mathematics expression and scaling of temperature sensing are discussed as a discipline of the design of the signal processing system,To get higher accurate of temperature,a method is provided to eliminate the temperature measure error due to the attenuation difference between two chan-nel by calculated method.