基于耦合技术的单色光谱吸收法检测甲烷气体浓度.pdfVIP

姜建国：基于耦合技术的单色光谱吸收法检测甲烷气体浓度 60 《激光杂志》2014 年第35 卷第11期 LASER JOURNAL （Vol.35.No.11.2014 ） 基于耦合技术的单色光谱吸收法检测甲烷气体浓度 姜建国，刘盈萱，王 源 （东北石油大学，黑龙江 大庆 163318） 摘要：针对电子检测装置在甲烷气体浓度检测时存在易燃易爆等安全隐患，本文提出了一种基于光纤耦合 技术的单色光谱吸收法检测甲烷气体浓度的方案。给出了单色光源的选择依据，设计了基于光纤耦合技术的 单色光谱吸收法检测装置，提出了应用Matlab 对甲烷气体浓度与输出电压两组数据进行线性拟合。通过输出 电压预测出甲烷气体浓度，并检测了预测值与真实值的误差。实验结果表明，将光纤耦合技术应用于单色光谱 吸收法检测甲烷气体浓度，可以在无电力介入的情况下对甲烷气体浓度进行实时检测，误差不超过2%。 关键词：光纤耦合技术；单色光谱吸收法；线性拟合；甲烷浓度；实时检测 中图分类号：TD712 文献标识码：A DOI 编码：10.14016/j.cnki.jgzz.2014.11.060 BasedBased onon thethe OpticalOptical fiberfiber couplingcoupling technologytechnology ofof spectralspectral absorptionabsorption methodmethod toto detectdetect methanemethane gasgas concentrationconcentration JIANG Jian-guo, LIU Ying-xuan, WANG Yuan （Northeast Petroleum University, Daqing 163318, China ） AbstractAbstract ：：In allusion to flammable and explosive safety problems of electronic testing equipment in methane gas concentration and adjustable laser expensive prices, put forward an application of coupling technique of mono- chromatic spectrum tests to detect methane gas concentration. The choice of monochromatic light source is given based on, designed a monochromatic spectrum absorption detection device based on optical fiber coupling technolo- gy. Application of Matlab is proposed for methane gas concentration and two sets of data output voltage linear fit- ting. Through the output voltage to predict methane gas concentration, and exam the error of the predicted values and the real value. The experimental results show that optical fiber coupling technology was applied to monochromatic spectrum absorption method to detect methane gas concentration can be without power in real-time