光谱学与光谱分析 |
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Research on Methane Concentration Monitoring System Based on Electro-Optical Modulation Interference |
YAN Jie, MENG Peng-hua |
Optoelectric Instrument Company, North University of China, Taiyuan 030051, China |
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Abstract Gas monitoring for methane concentration has been applied in many areas, while the vast majority of methods were based on the chemical reaction. There is a low security and poor stability shortcomings. In contrast, it is of high stability and strong anti-interference ability to monitor methane concentration using optical interferometry for quantitative analysis. As the system static interference limits the spectrcum resolution, we designed the electro-optical modulation interference system to further improve the detection accuracy for methane concentration. In the interferometer system, a variable refractive index crystal LiNbO3 was used for electro-optical modulation, and the static optical path length scan range was increased to improve the spectrum resolution. Both sides of the crystal were loaded with opposite phase modulated signal, so that it does not change the improved spectrum resolution interferometer size. By derivation of refractive index modulation as a function of optical path difference, the simulation found that the resolution was increased by nearly an order of magnitude than interference system spectrum resolution of the same size. The experiments used the SGT-3-type acousto-optical modulator and the 1 650 nm infrared lasers to detect different concentrations of methane gas. The experimental results show that the method is better than the traditional pyroelectric method in terms of accuracy and stability, and more suitable for application in the mine complex environment.
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Received: 2012-12-25
Accepted: 2013-03-09
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Corresponding Authors:
YAN Jie
E-mail: yanjienuc@163.com
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[1] HUANG Chun, DUAN Xiao-qiang, WANG Xian-zhong(黄 春, 段小强, 汪献忠). Instrument Technique and Sensor(仪表技术与传感器),2009, 4(4):138. [2] Katie M Krause, Jerome Genest. Applied Optics, 2006, 45(19): 4684. [3] ZHOU Qi-xun, WANG Mian-hua, LE Chun-xia(周奇勋, 王勉华, 乐春峡). Chinese Journal of Scientific Instrument(仪器仪表学报),2003, S1: 10. [4] Mohsen Ghazel, Anthony Traboulsee, Rabab K Ward. IEEE, 2006, 10(11): 1. [5] Acosta Eva, Chamadoira Sara, Blendowske Ralf. OSA, 2006, (23)3: 632. [6] Tiziani H J, Uhde H M. Appl. Opt., 1994, 33(4): 567. [7] Mitsuhino Ihihara, Hiromi Sasaki. Opt. Eng., 1999, 38(6): 1035. [8] ZHANG Xiao-li, LIANG Da-kai, LU Ji-yun(张晓丽, 梁大开, 芦吉云). Chinese Journal of Lasers(中国激光),2011, 1: 126. [9] TANG Yi, NI Guo-qiang, LIAO Ning-fan, et al. Optical Technique, 2007, 32(3): 427. [10] ZHANG Yin-chao, HU Huan-ling, SHAO Shi-sheng(张寅超, 胡欢陵, 邵石生). Chinese Journal of Quantum Electronics(量子电子学报),2006, 23(3): 346. [11] LIU Xiao-qin, ZHANG Yin-chao, HU Huan-ling(刘小勤, 张寅超, 胡欢陵). Infrared and Laser Engineering(红外与激光工程),2005, 34(2): 151. [12] LI Xiao-lu, JIANG Yue-song(李小路, 江月松). Science in China(Series E: Information Sciences)(中国科学E辑: 技术科学),2006, 11: 105. [13] DU Xiao-yong, ZHANG Yin-chao, QU Kai-feng(杜小勇, 张寅超, 屈凯峰). Journal of Atmospheric and Environmental Optics(大气与环境光学学报),2006, 1(2): 97.
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