摘要
分布式光纤温度测量系统是用于实时空间温度场分布测量的传感系统,是一种分布式的、连续的光纤温度传感器。光纤同时担任了传输媒质和传感媒质的作用,利用光纤中传输光的背向喇曼散射效应,对光纤本身所处的温度场分布情况进行实时分布式的测量,利用光时域反射技术对测量点精确定位。测量得到的信号存在随机误差,对传统信号滤波法进行了改进,采用灰色系统GM(1,1)模型进行滤波。文章阐述了分布式光纤温度测井技术的原理,从基本理论上给出了光纤测温的基础,并针对光纤有噪信号的改进的滤波方法进行了探讨和论述,给出了分布式光纤温度测井的温度剖面分布图及其滤波后的温度分布图,说明了光纤温度测井是一种效果好的温度测量方法,所提滤波方法可以应用到光纤测温的信号滤波中。
The distributed optical fiber temperature measurement system is developed for the real-time measurement of temperature field in space,it is a distributed and continuous optical fiber temperature sensors.This paper begins by describing the principle of the distributed optical fiber temperature log technology,gives the basis of the optical fiber temperature measurement in basic theory,and discusses the improved signal filtering method,then gives temperature profile distribution and filtering temperature profile distribution of the distributed optical fiber temperature log,illustrates that the optical fiber temperature log is a good temperature measurement method,and the signal filtering method proposed by this paper can be used in the signal filtering of the optical fiber temperature measurement system.
出处
《石油仪器》
2010年第5期4-7,99,共4页
Petroleum Instruments
关键词
分布式光纤
温度测井
喇曼散射
注蒸汽
信号滤波
GM(1
1)
distributed optical fiber
temperature log
raman-scattering
steam injection
signal filtering
GM(1,1)
