基于近红外光谱技术的多组分毒性气体检测研究  

Study on Monitoring Multi-Component Toxic Gases Based on Near-Infrared Spectroscopic Method

作　　者：赵建华[1] 赵崇文[1] 魏周君[1] 高明亮[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,安徽合肥230027

出　　处：《光学学报》2010年第2期567-573,共7页Acta Optica Sinica

基　　金：安徽省自然科学基金(070415221)资助课题

摘　　要：基于近红外波长调制光谱和谐波探测方法,并采用时分复用方案,建立了多组分毒性气体同时检测的实验系统。成功实现了对火灾产物中多组分毒性气体(包括CO,CO2,HCN)浓度的同时检测,并通过对三个通道的基频分量和二次谐波分量进行实时数据处理,计算得到浓度结果。三种毒性气体各组分的满量程体积分数分别为4×10-4,4×10-4,3×10-4,测量结果误差的最大值不超过满量程的0.73%。实验结果表明,该系统进行气体浓度检测具有较好的线性度,并满足检测精度要求。An experimental system for detecting multi-component toxic gases,which is based on the near-infrared wavelength modulation spectroscopy and harmonic detection technology,is established by taking use of time division multiplexing method. Detecting multi-component toxic gases （CO2,CO,HCN） generated by a fire at one time is completed by this experiment. The full-scales of the three gases are 400×10^-6,400×10^-6 and 300×10^-6. The data carried from the detector is processed simultaneously while the gases are being monitored. The results show that the error between the real gas concentration and the measured gas concentration is less than 0.73% of the full scale. Therefore,this system has a fine linearity and can reach sensitive level for gas detection.

关 键 词：激光光学 光检测技术 波长调制光谱术 多组分毒性气体 时分复用 

分 类 号：TN247[电子电信—物理电子学] X924.2[环境科学与工程—安全科学]