甲烷气体多点光纤传感系统的研究  

Study on multi-point fibre-optic sensor system for methane

作　　者：王玉田[1] 李晓昕[1] 刘占伟[1] 郭媛[1] 王书涛[2] 车仁生[2] 

机构地区：[1]燕山大学电气工程学院,河北秦皇岛066004 [2]哈尔滨工业大学自动化与控制系,黑龙江哈尔滨150001

出　　处：《光电工程》2004年第6期21-23,共3页Opto-Electronic Engineering

基　　金：河北省自然基金资助项目(600227)

摘　　要：基于气体在其特征吸收波长下光的吸收随浓度变化的机理和空分复用技术,复用多个气体吸收型光纤传感器,并通过谐波检测技术对微弱信号进行处理,设计了一套甲烷气体多点光纤传感系统。研究表明,该传感器的精确度为 5ppm,精确度和稳定性均可满足实际要求,仪器可在多场合进行多点在线测量。Through processing weak signal with harmonic detection technique, a multi-point fibre-optic gas sensor system for measuring methane is designed based on light absorbing capability of gas, which varies with gas concentration at its characteristic wavelength and space division multiplex technique. Study shows that the accuracy of instrument is 5ppm, accuracy and stability of the sensor can meet practical demands. It can be applied to multi-point measurement at real-time in multiple occasions.

关 键 词：光纤传感器 气体检测 空分复用 谐波检测 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]