Application of Broadband Photoacoustic Spectroscopy in Methane Concentration Detection
Jiguang yu guangdianzixue jinzhan(2019)
摘要
A photoacoustic spectroscopy detection system based on a broadband light source is introduced, and the methane concentration is detected at the optimum modulation frequency of 22 Hz; further, the stability and the minimum detection concentration of the system arc analyzed with Allan variance. The research results exhibit that the concentration (volume ratio) detection limit of methane can exceed 1 X 10(-6). The methane concentration is detected by broadband photoacoustic system and direct absorption detection system based on distributed feedback diode laser source with a long path absorption cell simultaneously. The detected results show that the error of methane concentration detection by the broadband photoacoustic system is about 8%.
更多查看译文
关键词
spectroscopy,concentration detection,photoacoustic spectroscopy,methane,long path absorption cell
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要