摘要
由于受到光纤损耗影响,长距离光纤测温精度较低。为了提高长距离光纤测温精度,提出了一种分布式光纤测温系统设计方案。通过理论分析确定了拉曼散射光中的损耗分量。对常温下的测试数据进行拟合建模,分离出损耗分量并对其进行补偿,消除了损耗对测试温度的影响,提高了长距离光纤测温的准确性。利用参考光纤环实现了光纤温度实时动态解调。将待测光纤环分别放置在50℃、60℃、70℃、80℃的恒温水槽中进行了试验,并对其数据进行了处理分析。结果表明,系统测温精度为±1℃,空间分辨率为2 m。
Due to the influence of fiber loss,the temperature measurement accuracy of long distance fiber is low.In order to improve the long distance optical fiber temperature measurement accuracy,a design scheme of distributed optical fiber temperature measuring system is proposed in this paper.The loss of Raman scattering light is determined through the theoretical analysis,and the fitting model is built based on the test data of room temperature.The loss is separated,and the influence of fiber loss on temperature is eliminated by compensating the fiber loss which improves the accuracy of long distance fiber temperature.The real-time dynamic demodulation of fiber temperature is realized by the reference fiber ring.The fiber ring to be measured is placed in a constant temperature water tank at 50℃,60℃,70℃ and 80℃ respectively for experiment,and the experimental data are processed and analyzed.The results show that the temperature measurement accuracy of the system is ±1℃,and the spatial resolution is 2 m.
作者
黄红伟
张志辉
徐瑞
李述标
方玉朝
HUANG Hong-wei;ZHANG Zhi-hui;XU Rui;LI Shu-biao;FANG Yu-chao(Ceyear Technologies Co.,Ltd.,Qingdao 266555,China)
出处
《红外》
CAS
2022年第5期35-40,共6页
Infrared
关键词
光纤
测温
损耗补偿
fiber
temperature measurement
loss compensation
作者简介
黄红伟(1993-),男,山东青岛人,硕士研究生,主要从事分布式光纤传感技术研究。E-mail:huanghongwei2011@126.com。
