CAJ | 학술논문

基于电力电缆温度在线监测的需求，设计了一种精度高、稳定性好的光纤光栅温度传感器，光栅的波长漂移与温度成线性关系，结合F?P可调滤波器和LabVIEW软件平台搭建光纤光栅温度在线监测系统，系统采用C2H2气体吸收谱作为F?P可调滤波器的实时校正波长，温度传感器的波长解调不受外界温度和压力等环境的影响，通过插值拟合算法实现光纤光栅中心波长的高精度解调，精度可达±5 pm，即测量温度精度为±0.2℃。
기우전력전람온도재선감측적수구，설계료일충정도고、은정성호적광섬광책온도전감기，광책적파장표이여온도성선성관계，결합F?P가조려파기화LabVIEW연건평태탑건광섬광책온도재선감측계통，계통채용C2H2기체흡수보작위F?P가조려파기적실시교정파장，온도전감기적파장해조불수외계온도화압력등배경적영향，통과삽치의합산법실현광섬광책중심파장적고정도해조，정도가체±5 pm，즉측량온도정도위±0.2℃。
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 ℃.