Abstract：According to the spectral absorption characteristics of polluting gases and fluorescence characteristics, a time-division multiplexing detection system is designed. Through this system we can detect Methane (CH4) and sulfur dioxide (SO2) by using spectral absorption method and the SO2 can be detected by using UV fluorescence method. The system consists of four parts: a combination of a light source which could be switched, the common optical path, the air chamber and the signal processing section. The spectral absorption characteristics and fluorescence characteristics are measured first. Then the experiment of detecting CH4 and SO2 through spectral absorption method and the experiment of detecting SO2 through UV fluorescence method are conducted, respectively. Through measuring characteristics of spectral absorption and fluorescence, we get excitation wavelengths of SO2 and CH4 measured by spectral absorption method at the absorption peak are 280 nm and 1.64 μm, respectively, and the optimal excitation wavelength of SO2 measured by UV fluorescence method is 220 nm. we acquire the linear relation between the concentration of CH4 and relative intensity and the linear relation between the concentration of SO2 and output voltage after conducting the experiment of spectral absorption method, and the linearity are 98.7%，99.2% respectively. Through the experiment of UV fluorescence method we acquire that the relation between the concentration of SO2 and the voltage is linear, and the linearity is 99.5%. Research shows that the system is able to be applied to detect the polluted gas by absorption spectrum method and UV fluorescence method. Combing these two measurement methods decreases the costing and the volume, and this system can also be used to measure the other gases. Such system has a certain value of application.
王书涛，王志芳*，刘铭华，魏 蒙，陈东营，王兴龙 . 基于光谱吸收法和荧光法的甲烷和二氧化硫检测系统的研究 [J]. 光谱学与光谱分析, 2016, 36(01): 287-291.
WANG Shu-tao, WANG Zhi-fang*, LIU Ming-hua, WEI Meng, CHEN Dong-ying, WANG Xing-long . Study of the Detecting System of CH4 and SO2 Based on Spectral Absorption Method and UV Fluorescence Method . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(01): 287-291.
[1] GAO Xing(高 星). Research on SO<sub>2</sub> and NO Gas Measurement with Absorption Spectrum. Harbin Institute of Technology(哈尔滨工业大学)，2008. 14. [2] WANG Ji-yuan(王吉元). Automation and Instrumentation(自动化仪表)，2009，30(2)：57. [3] ZHANG Cheng-yun, HE Zhen-jiang, YANG Guan-ling, et al(张成云，何振江，杨冠玲，等). Opto-Electronic Engineering(光电工程), 2005, 32(7): 19. [4] WANG Shi-long，WANG Li-na，WANG Hong-bo，et al(王世龙，王丽娜，王洪博, 等). Instrument Technique and Sensor(仪表技术与传感器), 2011, 4: 38. [5] ZHENG Hai-ming，DONG Zhen-liang，XIE Dong-shui(郑海明, 董振良, 解东水). Proceedings of the CSEE(中国电机工程学报)，2013, 33(35): 44. [6] WANG Tie-yun，ZHANG Lei，DONG Lei，et al(王铁云，张 雷，董 磊，等). Chinese Journal of Lasers(中国激光), 2006, 33(3): 405. [7] XIONG Jian-wen，YANG Chu-ping，HE Zhen-jiang(熊建文, 杨初平, 何振江). Journal of Optoelectronics Laser(光电子激光), 2002(8): 822. [8] LU Jing(芦 婧). Study on the Detecting Scheme of Absorptive Spectrum Optical Fiber Methane Gas Sensor. Harbin Engineering University(哈尔滨工程大学)，2009. 22. [9] Ismal B Y, Halima A. Sensors and Actuators B: Chemical, 2013(185): 309. [10] WANG Shu-tao，CUI Yan-yan(王书涛, 崔彦彦). Infrared and Laser Engineering(红外与激光工程), 2012, 41(8): 2141. [11] Lide D R. CRC Handbook of Chemistry and Physics. CRC Press，Boca Raton，Fla，USA，1997. 15. [12] Pavlos S, Kanaroglous, Matthew D A. Atmospheric Environment, 2013，(79): 421.
