分布式Raman测温系统在隧道中的应用

Distributed Raman temperature measurement system in the application of the tunnel

由于隧道半密闭的结构特殊性,有火情发生时高温和浓烟会对隧道设施和人身安全造成极大的伤害,因此监测隧道温度的分布特点对于火灾预防和及时扑灭具有重要意义。分布式温度监控系统由DTS下位机、多模传感光纤和温度解调上位机软件组成。文中介绍了分布式温度监控系统的工作原理与系统结构,说明了斯托克斯(Stokes)光和反斯托克斯(Anti-Stokes)光强的温度解调方式,将分布式Raman测温系统应用于隧道测温,通过搭建分布式温度监控系统解调得到整个隧道准确的实时温度变化情况,给出了昆玉高速山心坡隧道现场实测数据。从实际温度曲线可以看出,解调出来的温度与实际温度相差基本一致,可以应用于隧道测温现场,对隧道温度进行实时监测。

Due to the particularity of the tunnel semi-hermetic structure,it has a high temperature and smoke fire occurs on the tunnel facilities and personal safety cause great harm,so the distribution characteristics of temperature monitoring of tunnel is of great significance for fire prevention and extinguish in time.Distributed temperature monitoring system consists of DTS,multimode fiber sensing and temperature demodulation of upper machine software.This paper introduces the working principle and system structure of distributed temperature monitoring system,illustrates the temperature of the light intensity demodulation method of the Stokes and anti-Stokes light,distributed Raman temperature measuring system was applied to tunnel temperature measurement,through constructing the distributed temperature monitoring system of demodulation by accurate real-time temperature changes,the whole tunnel is given out tunnel field measured data at a high speed.As can be seen from the actual temperature curve,the demodulation of temperature and actual temperature is almost the same,it can be used in the tunnel temperature field,the temperature real-time monitoring of tunnel.