光导纤维测温计及其在混凝土坝温度测量中的应用  

Optical fiber Thermometer & Its Application in Temperature Measurement of Concrete Dams

作　　者：刘颖 

机构地区：[1]中国水利水电第九工程局,贵州贵阳550001

出　　处：《贵州水力发电》2000年第4期81-84,共4页Guizhou Water Power

摘　　要：利用光导纤维测定温度的分布 ,是一项崭新的应用技术。该技术利用光纤作为温度传感器 ,通过测量发射光和接收定点反射光的时间差及光在光纤中的传播速度 ,可精确地确定发生反射的位置 (定位 ) ;利用反射光中拉曼 (Raman)反射光的温度依存性质 ,可以计算出发生反射的点的温度值 ,与传统温度计的不同之处是光纤温度计可以连续测量光纤的温度分布。本文在介绍光导纤维温度计的基本原理之后 ,对日本某混凝土坝的实测温度场进行分析并与传统温度计的测量结果进行对比。结果表明 ,光纤温度精度高、密度大 ,而且通过高精度测量 ,还可以推测坝体的渗漏位置 。It is a brand-new application technology to use optical fiber for measuring the distribution of temperature. This technology uses optical fiber as temperature sensor, measuring the time difference of launching light and the light reflecting from a fixed point, as well as the propagation speed of light in the optical fiber, the location of the fixed point can accurately be defined (defining position). Used the interdependent nature with temperature of Raman reflecting light exiting in the reflecting light, the temperature value of launching point can be calculated. The different part of it with the traditional one is that optical fiber thermometer can continuously measure the temperature distribution. Introducing the basic principle of optical fiber thermometer, the paper analyses measurement results of temperature field using optical fiber thermometers in a concrete dam of Japan and compares the results with the one using traditional thermometers. The result indicates that optical fiber thermometer not only has high precision and big density, but also the seepage position of dam body can be inferred through his measurement of high precision. The optical fiber thermometer will have very good application foreground at aspects of concrete temperature field measurement and supervision.

关 键 词：光导纤维温度计 混凝土坝 温度测量 应用 

分 类 号：TV64[水利工程—水利水电工程]