Laser Modulating Technology Realizing Harmonic Ezamination of Coal Mine Gas Concentration

摘要：

According to defects of former coal mine gas examination methods,it propose that using diode laser modulating technology and harmonic surveying technology to real-time remote sensing survey to coal mine methane. The second harmonic is selected by theory deduction to survey concentration of gas. This plan selects 2 v3 absorption band R6 branch absorption line of methane to survey the smallest detectable concentration of methane,and experimental result confirms the smallest detectable concentration of methane by this plan is 4.2×10-4atm.m. It presents low surveying power and high sensitivity characteristic,and it can realize distributed multi-points real-time monitor for methane.

关键词： coal mine gas laser spectrum wavelength modulation spectrum harmonic ezamination

作者: Mengran Zhou Cangrong Zhao Yuliang Liu Haiqing Zhang

作者单位: School of Electrical & Information Engineering,Anhui University of Science and Technology,Huainan 232001,Anhui,China

会议类型: 国际会议

会议名称: 2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)

会议地点: 北京

会议语种:英文

页码: 1599-1602

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）