OPEN PATH EMISSION SENSING SYSTEM,申请号WO2002US25173-传众专利搜索

OPEN PATH EMISSION SENSING SYSTEM

申请公布号：WO03019160(A3)

申请号：WO2002US25173

申请日期：2002.08.09

申请公布日期：2003.08.14

申请人：

SPX CORPORATION;RENDAHL, CRAIG, S.;DIDOMENICO, JOHN;GENTALA, ROBERT, A.;FOLEY, THERESA, A.

发明人：RENDAHL, CRAIG, S.;DIDOMENICO, JOHN;GENTALA, ROBERT, A.;FOLEY, THERESA, A.

分类号：G01M15/10;G01N1/22;G01N15/06;G01N21/31;G01N21/33;G01N21/35;G01N21/53

主分类号：G01M15/10

摘要：An open path device for measuring particulate matter and/or gaseous components in an air sample, for example in a vehicle emissions, includes one or more light sources (120, 144, 146) for emitting visible and/or infrared and/or ultraviolet light and a detection unit (90) for detecting light emitted by the one or more light sources, transmitted through the air sample and reflected back to the detection unit by a reflection unit (124). In a configuration with plural light sources (120, 144, 146) the light beams (122, 148, 152) emitted from the light sources are combined by beam splitter/combiner means (140, 142) to follow essentially the same optical path (132, 134) to the detection unit. Particulate matter and/or gaseous component concentrations are derived from light intensities measured by a detection unit using the Lambert-Beer law.