摘要
基于喇曼散射和光时域反射原理,分析后向散射光中反斯托克斯光和斯托克斯光光强比值,研制了基于多模光纤的分布式喇曼温度传感系统.采用对低、高温段温度分别进行拟合的动态温度标定方案,将测温精度提升至±1℃.分别对系统温度分辨率、测温精度、空间分辨率以及重复性进行了实验,结果表明:系统温度分辨率为1℃,空间分辨率为1m,系统稳定性良好,能够适应复杂环境变化.
Through the analysis of the intensity ratio of anti-stokes and stokes light of the backscattering light,a multimode optical fiber Raman temperature sensing system had been developed based on Raman scattering and optical time domain reflection principle.Using a new type of dynamic temperature calibration program for fitting low and high temperature zone respectively,which improved the measuringtemperature accuracy up to±1℃.This paper respectively conducted the system temperature resolution,temperature measurement precision,spatial resolution and repeatability experimental verification.The experimental results show that the temperature resolution of 1℃,the spatial resolution of 1m,the system stability is good and can adapt to the complex environmental change.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2015年第1期69-73,共5页
Acta Photonica Sinica
基金
国家自然科学基金(No.61376121)
中央高校资助项目(Nos.106112013CDJZR120008
125502
120003)资助
关键词
喇曼散射
分布式测温
动态标定
温度分辨率
空间分辨率
Raman scattering
Distributed temperature measurement
Dynamic calibration
Temperature resolution
Spatial resolution
