现代电子技术Issue(5)：142-144,148,4.
基于气体特征吸收谱线的电缆光纤光栅温度监测系统
Fiber Bragg grating temperature monitoring system of power cables based on gas characteristic absorption spectrum
沈庆河 1刘嵘 1刘辉1
作者信息
- 1. 山东电力研究院，山东 济南 250002
- 折叠
摘要
Abstract
A fiber Bragg grating(FBG)temperature sensor with high accuracy and high stability was designed based on the requirement of on⁃line power cable temperature monitoring. The wavelength drift of FBG has a linear relationship with tempera⁃ture. The on⁃line FBG temperature monitoring system was built based on Fabry⁃Perot(F⁃P)tunable filter and LabVIEW soft⁃ware,in which the absorption spectrum of C2H2 gas is adopted as real time calibration wavelength of the F⁃P tunable filter. The wavelength demodulation of the temperature sensor is not affected by external temperature and pressure. The interpolation fitting algorithm is used to realize high precision demodulation of FBG center wavelength,whose precision can be up to ± 5 pm. It means the accuracy of the detection temperature is ±0.2 ℃.关键词
电缆温度/光纤光栅/气体吸收谱/LabVIEWKey words
cable temperature/fiber Bragg grating/gas absorption spectrum/LabVIEW分类
信息技术与安全科学引用本文复制引用
沈庆河,刘嵘,刘辉..基于气体特征吸收谱线的电缆光纤光栅温度监测系统[J].现代电子技术,2015,(5):142-144,148,4.
