Apparatus for remote analysis of vehicle emissions

G - Physics – 01 – N

Patent

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G01N 21/31 (2006.01) G01M 15/00 (2006.01) G01N 21/33 (2006.01) G01N 21/35 (2006.01)

Patent

CA 2099259

A gas analysis device (10) for the remote detecting, measuring and recording of NOx, CO, CO2, HC and H2O levels from the exhaust (30) of moving motor vehicles (28). It utilizes a source (11) of collimated infrared and ultraviolet radiation (15) and includes a mechanism (16) positioned on the opposite side of the roadway for receiving and measuring the infrared and ultraviolet radiation from the source (11) transmitted through the vehicle exhaust. The receiving mechanism splits the combined infrared and ultraviolet radiation into separate infrared and ultraviolet beams (42) and (40). A mechanism (44) receives the separate ultraviolet beam and generates a signal indicative of NOx. Another mechanism (27) splits the infrared beam into two to four components, and devices (35) are positioned for receiving each of the infrared components and generating two to four signals indicative of, for example, CO, CO2, HC and H2O. Another associated mechanism (17) then computes and produces signals indicative of the amount of CO, CO2, HC, NOx and H2O in the path of the infrared and ultraviolet radiation from the source, thereby making it capable of measuring emissions of vehicles.

Enter the French Abstract.Dispositif d'analyse de gaz (10) servant à la détection, la mesure et l'enregistrement à distance des niveaux de NOx, CO, CO2, HC et H2O provenant de l'échappement (30) de véhicules automobiles en déplacement (28). Ledit dispositif utilise une source (11) de rayonnement collimaté d'infrarouges et d'ultraviolets (15) et comprend un mécanisme (16) placé sur le côté opposé de la route et servant à recevoir et à mesurer le rayonnement infrarouge et ultraviolet provenant de la source (11) et transmis par l'échappement du véhicule. Le mécanisme de réception divise le rayonnement combiné d'infrarouges et l'ultraviolets en faisceaux séparés d'infrarouges et d'ultraviolets (42) et (40). Un mécanisme (44) reçoit le faisceau ultraviolet séparé et émet un signal indiquant la présence de NOx. Un autre mécanisme (27) divise le faisceau infrarouge en deux, trois ou quatre composantes, et des dispositifs (35) sont positionnés pour recevoir chacune desdites composantes d'infrarouges et pour produire deux, trois ou quatre signaux indiquant, par exemple, la présence de CO, CO2, HC et H2O. Un autre mécanisme associé (17) effectue alors un calcul et émet des signaux indiquant la quantité de CO, CO2, HC, NOx et H2O se trouvant dans le trajet du rayonnement d'infrarouges et d'ultraviolets à partir de la source et, de ce fait, il peut mesurer les émissions de véhicules.

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