CAJ | 학술논문

提出了一种基于光纤光栅法布里-珀罗干涉仪且可以同时测量交变电流和温度的传感器,并对其进行了理论分析和实验研究.该传感器采用单频激光入射,作为反射镜的一对光纤布喇格光栅自由放置,其间的法布里-珀罗腔粘贴在磁致伸缩材料上,通电导线周围的磁场通过磁致伸缩材料作用于光纤光栅法布里-珀罗腔,引起腔长周期性变化.同时,由于热膨胀和热光效应,环境温度的变化会引起光纤长度和折射率的改变,从而改变光纤光栅法布里-珀罗腔的反射光谱特性.通过检测输出光信号的频率和峰值可实现电流和温度的同时测量.对通电线圈的电流及环境温度进行测量的实验结果与理论分析相吻合.
제출료일충기우광섬광책법포리-박라간섭의차가이동시측량교변전류화온도적전감기,병대기진행료이론분석화실험연구.해전감기채용단빈격광입사,작위반사경적일대광섬포나격광책자유방치,기간적법포리-박라강점첩재자치신축재료상,통전도선주위적자장통과자치신축재료작용우광섬광책법포리-박라강,인기강장주기성변화.동시,유우열팽창화열광효응,배경온도적변화회인기광섬장도화절사솔적개변,종이개변광섬광책법포리-박라강적반사광보특성.통과검측수출광신호적빈솔화봉치가실현전류화온도적동시측량.대통전선권적전류급배경온도진행측량적실험결과여이론분석상문합.
A fiber optic sensor based on Fiber Bragg Grating(FBG)Fabry-Perot Interferometer (FPI) is designed and experimentally demonstrated for simultaneous measurement of alternating current and temperature,in which a laser with single-frequency is used as the light source.The cavity of the FPI is affixed to magnetostrictive material and the pair of (FBG) as the cavity reflectors is placed freely.The length of the cavity is changed cyclically due to the influence of magnetic field around the current on magnetostrictive material,and the peak reflectivity of the FPI is affected by the temperature because of the thermal expansion and the thermo-optic effect.Theoretical analysis indicate that,the temperature and the current can be simultaneously measured by detecting the peaks and frequences of the signal.The experimental results of measuring the current of a coil and the environmental temperature agree well with the theory.This sensor has a wide application prospect due to its simple manufacture and easy demodulation.