METHOD AND SYSTEM FOR OPTICALLY MEASURING THE CONCENTRATION OF GASEOUS SPECIES OF EXHAUST GASES

The invention concerns a method and system for measuring, in situ, the concentration of gaseous chemical species, such as NO, NO2, NH3, BTX, SO2, H2S, O3 and O2, contained in exhaust gases (10) circulating in an exhaust line (20) and the temperature of said gases, by means of an optical measurement...

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Bibliographische Detailangaben
Hauptverfasser:	SCHIFFMANN, Philpp, LECOMPTE, Matthieu, HAYRAULT, Pascal, LAGET, Olivier
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	The invention concerns a method and system for measuring, in situ, the concentration of gaseous chemical species, such as NO, NO2, NH3, BTX, SO2, H2S, O3 and O2, contained in exhaust gases (10) circulating in an exhaust line (20) and the temperature of said gases, by means of an optical measurement system comprising a light source (41) and a spectrometer (44). The source emits UV radiation through the gases within a measurement area (21) situated inside the line. The spectrometer detects at least a portion of said UV radiation having passed through the gases and generates a digital signal of the light intensity (50) depending on the wavelength of the portion of the UV radiation having passed through the gases. The concentration of chemical species and the temperature of the gases is then estimated from the digital signal.