差分吸收式光纤NO_2气体传感器  

Differential Absorption Optical Fiber NO_2 Gas Sensor

作　　者：张景超[1] 刘瑾[1] 王玉田[1] 杨海马[1] 

机构地区：[1]燕山大学理学院,河北秦皇岛066004

出　　处：《仪表技术与传感器》2004年第5期4-5,20,共3页Instrument Technique and Sensor

基　　金：河北自然科学基金资助项目(600227)

摘　　要：NO2是对人体有害的毒性气体,NO2的工业污染问题日益突出,NO2指标呈增长趋势,因此,快速、实时检测NO2浓度对于防治环境污染,保护环境和人体健康都具有重大意义。基于NO2的光谱吸收特性,设计了一种检测NO2浓度的光纤传感系统,采用双波长差分检测技术有效消除了由光源、光纤和传感头的不稳定所引起的检测误差,提高了检测灵敏度。并且可以将传感头放入NO2浓度较高的环境下进行经济、实时、安全的测量,避免了人体进入恶劣环境所造成的伤害。Nitrogen dioxide is a poisonous gas harmful to people.It is increasing so fast,and real-time measurement of nitrogen dioxide is very important for environment and people's healthy.Based on the principles of nitrogen dioxide molecules' absorption spectra,an optical fiber gas sensor was designed to the pollution of enviroment.Two wavelength differential absorption measurement was used to eliminate the interference owing to verious disturbances,such as light power,optical fibre,sensor head changing,thus the sensitivity is improved.The sensing part can be put into the environment that the concentration of the nitrogen dioxide is very high.So measurement can be realized on real-time,economically and safely and avoid the harm when people come into the abominable environment.

关 键 词：气体传感器 NO2 光谱吸收 差分检测 实时测量 光纤传感器 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]