红外与毫米波学报2018，Vol.37Issue(1)：106-111,6.DOI:10.11972/j.issn.1001-9014.2018.01.019
近红外混叠吸收线光谱解析及线强测量方法研究
Spectral analysis and line strength measurement method of near-infrared overlapped absorption lines
摘要
Abstract
In recent years,near-infrared laser absorption spectroscopy detection technique has developed rapidly,and spectral analysis of absorption lines is one of the important research contents of spectrum detection.The experimental platform for gas laser absorption spectroscopy measurement was established in this study,moreover the experiment of ammonia characteristic spectroscopy analysis at 6 528.8 cm-1 and algorithm research were carried out.Experimental results show that the root mean square error of the measured signal reduced 4.45 times after combined with wavelet denoising method,and the fitting residual error of overlapped absorption lines was lower than 2％ by using multi-line Voigt line profile fitting algorithm.In the experiment,the ammonia characteristic absorption spectrum of different pressures at room temperature was obtained,and the line strength parameters of each absorption line were also calculated.The relative deviation between the measured results and Hitran database was between 5.67 ～8.2％,and the uncertainty of calculated line strength was about 4.6％.The accurate measurement of line strength by the effective spectrum analysis algorithm of overlapped absorption lines is in favor for improving the accuracy of ammonia concentration inversion.关键词
激光吸收光谱/光谱解析/小波降噪/线型拟合/线强Key words
laser absorption spectroscopy/spectrum analysis/wavelet denoising/line profile fitting/line strength分类
数理科学引用本文复制引用
贾巍,何莹,张玉钧,刘建国,刘文清,王敏,张润梅..近红外混叠吸收线光谱解析及线强测量方法研究[J].红外与毫米波学报,2018,37(1):106-111,6.基金项目
国家重点研发计划课题(2016YFC0201003),安徽省科技重大专项(15CZZ04124),国家环境光学监测仪器工程技术研究中心开放基金(2005DP173065-2016-02),安徽建筑大学引进人才及博士启动基金(2016QD111)Supported by National Program on Key Research Project of China (2016YFC0201003),Science and Technology Major Project of the Ministry of Science and Technology of Anhui Province (15CZZ04124),Open fund of National environmental optical monitoring instrument engineering technology research center of China (2005DP173065-2016-02),Introduction of talent and doctoral start-up fund of Anhui Jianzhu University (2016QD111) （2016YFC0201003）
