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1. 发明授权

US5558836A Emission detection systems for determining the presence of contaminants 失效
标题翻译：用于确定污染物存在的排放检测系统
公开(公告)号：US5558836A
公开(公告)日：1996-09-24
申请号：US316905
申请日：1994-10-03
申请人： David P. Rounbehler , Dirk Appel , Daniel A. Dussault , Thomas M. Levine , Jonathan E. Bosworth
发明人： David P. Rounbehler , Dirk Appel , Daniel A. Dussault , Thomas M. Levine , Jonathan E. Bosworth
IPC分类号： G01N21/15 , G01N21/90
CPC分类号： G01N21/15 , G01N21/9018
摘要： A detection system for detecting the emission (i.e., the fluorescence or phosphorescence) from a contaminant contained in a sample gas. In order to keep the optics of the system clean and maintain a high signal-to-noise ratio in the detected signal, the detection system contains a housing separated into illumination and sample chambers by an aperture-containing partition. A sample inlet port is connected to the sample chamber, and a purge inlet port is connected to the illumination chamber to direct the purge and sample gasses into their respective chambers. A vacuum system is connected to a vacuum port on the sample chamber to simultaneously draw the sample and purge gasses into their chambers through the inlet ports; the purge gas is then drawn through the aperture and into the sample chamber. Finally, both gasses are drawn out of the sample chamber through the vacuum port. Thus, the vacuum provides a flow of sample gas into the sample chamber, and a flow of purge gas into the illumination chamber to reduce contact between the sample gas and a portion of the optics, thereby keeping them free of debris.
摘要翻译：一种用于从包含在样品气体中的污染物检测发射（即，荧光或磷光）的检测系统。为了保持系统的光学系统清洁并且在检测到的信号中保持高的信噪比，检测系统包含通过孔径分隔分隔成照明和样品室的壳体。样品入口连接到样品室，净化入口连接到照明室，以将吹扫和样品气体引导到它们各自的室中。真空系统连接到样品室上的真空端口，以同时抽取样品并通过入口将气体吹扫到其室内; 吹扫气体然后被吸入孔中并进入样品室。最后，气体都通过真空口从样品室中抽出。因此，真空提供样品气体流入样品室，以及吹扫气体流入照明室，以减少样品气体和光学部件之间的接触，从而保持它们没有碎屑。

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