摘要
基于拉曼背向散射和光时域反射技术设计分布式多模光纤温度报警系统,该系统由测温主机、测温多模光纤及Lab VIEW温度解调软件构成,测温主机主要包括脉冲激光器、波分复用器、雪崩光电二极管及双通道高速数据采集卡等器件。最后搭建实验平台,模拟随机多点火灾报警。试验数据表明,实际测量系统实现3km的分布式测量,空间分辨率为1m,在累加平均4000次的情况下测温精度达到±2℃,完成一次测量时间21s。系统具有反应速度快、定位准确、可靠性好、可准确测出光纤沿线温度及信息量大的特点,适应实际分布式测量和监控环境的要求。
Designs the distributed multimode fiber temperature alarm system based on Raman backscattering and optical time domain reflection technology. The system is composed of a temperature measuring machine mainly includes the device such as pulse laser, wavelength di-vision multiplexing, avalanche photodiode detector and two-channel high speed data acquisition card, a multimode optical fiber and a Lab VIEW temperature demodulation software. The experimental platform is set up to simulate the random multipoint fire alarm. Experi-mental data show that the actual measurement system is obtained with distributed measurement of 3km, the spatial resolution of 1m, the temperature measurement accuracy of 2 ℃ in the case of cumulative average 4000 times and takes 21 s to complete a measurement. The system has the characteristics of fast response, accurate positioning, good reliability, and can accurately measure the temperature along the fiber. So it adapts to the requirements of the actual distributed measurement and monitoring environment.
出处
《现代计算机》
2016年第4期78-82,共5页
Modern Computer
基金
北京市教育委员会科技计划面上项目(No.KM201411232005)
青年拔尖人才培育计划(No.CIT&TCD201404122)
关键词
分布式光纤
拉曼散射
光时域反射技术
温度测量
Distributed Optical Fiber
Raman Scattering
Optical Time Domain Reflection Technology
Temperature Measurement
