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CA2131865A1 - Optical Sensing Apparatus for Remotely Measuring Exhaust Gas Composition of Moving Motor Vehicles - Google Patents

Optical Sensing Apparatus for Remotely Measuring Exhaust Gas Composition of Moving Motor Vehicles

Info

Publication number
CA2131865A1
CA2131865A1 CA 2131865 CA2131865A CA2131865A1 CA 2131865 A1 CA2131865 A1 CA 2131865A1 CA 2131865 CA2131865 CA 2131865 CA 2131865 A CA2131865 A CA 2131865A CA 2131865 A1 CA2131865 A1 CA 2131865A1
Authority
CA
Canada
Prior art keywords
plume
photodetectors
composition
video
exhaust gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2131865
Other languages
French (fr)
Other versions
CA2131865C (en
Inventor
Michael D. Jack
David R. Nelson
Robert D. Stephens
Geoffrey A. Walter
Christopher B. Tacelli
Jose A. Santana
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Envirotest Systems Corp
GM Global Technology Operations LLC
Original Assignee
Santa Barbara Research Center
General Motors Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Santa Barbara Research Center, General Motors Corp filed Critical Santa Barbara Research Center
Publication of CA2131865A1 publication Critical patent/CA2131865A1/en
Application granted granted Critical
Publication of CA2131865C publication Critical patent/CA2131865C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

A light source (12) radiates an infrared beam (14) through the exhaust plume (22) of a motor vehicle (20) which passes in front of the source (12). A photosensor unit (18) includes a plurality of photodetectors (42,44,-46,48) which are spaced closely adjacent to each other and simultaneously sense the beam (14) after it propagates through the plume (22). An optical beam homogenizes or integrator (36) disposed between the plume (22) and the photosensor unit (18) causes the light incident on the photodetectors (42,44,46,48) to have uniform intensity.
The photodetectors (42,44,46,48) are sensitive to different wavelengths corresponding to spectral absorption peaks of constituents of the composition of the plume (22), including carbon monoxide (CO), carbon dioxide (CO2) and hydrocarbon (HC). A computer (24) computes the composition of the plume (22) as the percentages of the constituents based on the sensed transmittances of the respective wavelengths through the plume (22). A video camera (26) produces a video image of the vehicle license plate (28), and a combiner (24,32) causes the video image to be displayed on a video monitor (30) and recorded on a video recorder (32) together with the plume composition data.
CA 2131865 1993-09-10 1994-09-12 Optical sensing apparatus for remotely measuring exhaust gas composition of moving motor vehicles Expired - Fee Related CA2131865C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11978893A 1993-09-10 1993-09-10
US119,788 1993-09-10

Publications (2)

Publication Number Publication Date
CA2131865A1 true CA2131865A1 (en) 1995-03-11
CA2131865C CA2131865C (en) 2000-06-13

Family

ID=22386417

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2131865 Expired - Fee Related CA2131865C (en) 1993-09-10 1994-09-12 Optical sensing apparatus for remotely measuring exhaust gas composition of moving motor vehicles

Country Status (1)

Country Link
CA (1) CA2131865C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7359804B2 (en) * 2004-08-25 2008-04-15 Environmental Systems Products Holdings Inc. System and method for calibrating remote emissions sensing instruments
US7485861B2 (en) 2004-02-09 2009-02-03 Environmental Systems Products Holdings Inc. System and method for remote emissions sensing including calculation and calibration techniques compensating for temperature and pressure effects
CN105259304A (en) * 2015-09-16 2016-01-20 张世达 On-line monitoring system and method for pollutants in vehicle tail gas
WO2017202947A2 (en) 2016-05-25 2017-11-30 Phoenix Ip Bv I.O. Method and system for determining the fuel consumptions actually resulting from the everyday operation of road vehicles, energy inputs and emissions

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7485861B2 (en) 2004-02-09 2009-02-03 Environmental Systems Products Holdings Inc. System and method for remote emissions sensing including calculation and calibration techniques compensating for temperature and pressure effects
US7359804B2 (en) * 2004-08-25 2008-04-15 Environmental Systems Products Holdings Inc. System and method for calibrating remote emissions sensing instruments
CN105259304A (en) * 2015-09-16 2016-01-20 张世达 On-line monitoring system and method for pollutants in vehicle tail gas
WO2017202947A2 (en) 2016-05-25 2017-11-30 Phoenix Ip Bv I.O. Method and system for determining the fuel consumptions actually resulting from the everyday operation of road vehicles, energy inputs and emissions

Also Published As

Publication number Publication date
CA2131865C (en) 2000-06-13

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20140912