基于TDLAS技术同时检测卷烟主流烟气中的CO和CO_2  

Simultaneous detection of CO and CO_2 in cigarette mainstream smoke based on TDLAS technology

作　　者：邢昆明[1,2] 杨柯[1,2] 张龙[1] 吴晓松[1,2] 李志刚[1,2] 王安[1] 刘勇[1] 计敏[1] 

机构地区：[1]中国科学院合肥物质科学研究院应用技术研究所,安徽合肥230031 [2]中国科学技术大学,安徽合肥230026

出　　处：《量子电子学报》2017年第1期81-87,共7页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金;21203203~~

摘　　要：基于可调谐二极管激光吸收光谱(TDLAS)技术、波长调制技术和二次谐波检测方法,利用CO和CO_2在1579 nm处的泛频吸收特征,结合改造后的单孔道吸烟机,建立了卷烟主流烟气逐口检测系统。实验结果表明:气体浓度与其二次谐波强度的线性度较好,系统响应速度较快,精度能达到检测要求,逐口检测稳定性、重复性和灵敏度均较好。同类型卷烟主流烟气中CO、CO_2的逐口释放量除第1口之外,均呈递增趋势,CO_2的逐口释放量和递增速率均比CO的大,且不同类型的卷烟遵循相同的规律。所建系统具有检测速度快、时间分辨率高、结构简单等优势,在卷烟烟气有害物质的快速检测领域具有较好的应用前景。Combined with the modified single-chamber smoking machine, the cigarette mainstream smoke puff-by-puff detecting system is established by utilizing the overtone absorption characteristics of CO and CO2 near 1579 nm based on tunable diode laser absorption spectroscopy （TDLAS） technique, wavelength modulation technique and second harmonic detection method. Experimental results show that the linearity between gas concentration and their second harmonic intensity is better. The system response speed is quick, and the precision can reach the detection requirements. The stability, repeatability and sensitivity of puff-by-puff detecting are all improved. The release amount of CO and CO2 in mainstream smoke for the same type of cigarettes increases with puff number except for the first puff. Both the puff-by-puff release amount and increasing rate of CO2 are larger than that of CO, furthermore, different types of cigarettes follow the same rules as well. The established system has the advantages of high detection speed, high time resolution, simple structure, and so on. It has a good application rospect in the field of rapid detection of harmful substances in cigarette smoke.

关 键 词：光谱学 同时检测 可调谐二极管激光吸收光谱 卷烟烟气 CO CO2 

分 类 号：O433[机械工程—光学工程]