摘要
分析了拉曼散射斯托克斯光和反斯托克斯光比值与温度分布的关系,并给出光时域反射距离定位解析表达式,设计出分布式光纤测温系统,并通过室内和室外试验对仪器的稳定性和准确性进行了验证。室内对恒温槽的水温进行测量,其最大测量误差为0.25℃;室外实验地点在沈阳市郊某大桥上游河滩上,对埋入地下的四层光纤进行注水并测温,通过传感光纤,各层温度变化情况能得到很好反映。
This paper analyzes light ratio and temperature distribution of the Stokes and anti Stokes Raman scattering light, gives the optical time domain reflection distance positioning analytical expression, designs the distributed optical fiber temperature measure-ment system, and verifies the stability and accuracy of instrument through indoor and outdoor tests. Through thermostatic bath water temperature indoor measurement, the maximum measurement error is 0. 25 ℃. The outdoor experiment sites suburb of a bridge upstream of the beach in Shenyang, the four layer of water temperature and fiber buried underground, through the sensing fiber, the temperature change can be well reflected.
出处
《电子技术应用》
北大核心
2017年第12期59-60,64,共3页
Application of Electronic Technique
关键词
光纤
拉曼散射
分布式
测温系统
fiber
Raman scattering
distributed
temperature measurement system
