-
公开(公告)号:US6064488A
公开(公告)日:2000-05-16
申请号:US870704
申请日:1997-06-06
申请人: Joel A. Brand , Garth A. Monlux , Patrick Zmarzly , Gregory J. Fetzer , Benjamin C. Halsted , Kenneth W. Groff , Jamine Lee , Neil Goldstein , Steven Richtsmeier , Fritz Bien
发明人: Joel A. Brand , Garth A. Monlux , Patrick Zmarzly , Gregory J. Fetzer , Benjamin C. Halsted , Kenneth W. Groff , Jamine Lee , Neil Goldstein , Steven Richtsmeier , Fritz Bien
CPC分类号: G01N21/39 , G01N21/031 , G01N21/8507 , G01N2021/399 , G01N2021/8521
摘要: A method and apparatus for in situ measurement of the concentration of a gas with a frequency modulated tunable diode laser is disclosed. The sampling cell, which is mounted in the flow of gases to be measured, is a Herriott cell. Gas enters the sampling cell through sintered metal filters that prevent entrance of particulates. Signals from a sample detector and a null detector are compared to eliminate interference patterns from the laser optics. High accuracy dynamic calibration of the apparatus is also disclosed.
摘要翻译: 公开了一种用频率调制可调谐二极管激光器原位测量气体浓度的方法和装置。 安装在要测量的气体流中的采样池是赫里奥特(Herriott)电池。 气体通过烧结金属过滤器进入采样池,防止颗粒进入。 比较来自样品检测器和零点检测器的信号以消除来自激光光学器件的干涉图案。 还公开了该设备的高精度动态校准。