On-board monitoring of hazardous exhaust emissions in passenger cars (category M1)

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A fibre-optic sensor for the monitoring of hazardous exhaust gases based on absorption in the ultra-violet region is described. The loss of light through a gas cell across the UV/VIS spectrum was utilised to determine the level of absorption for three of the exhaust gases present in an exhaust. The measured absorption specific to each of these test gases Nitrogen Dioxide (NO 2), Sulphur Dioxide (SO2) and Nitric Oxide (NO) was used in a variation of the Beer-Lambert law to determine the absorption line intensities for each of the gases. Theoretical absorption line intensities for each of the exhaust gases compared favorably with our measured results. A Lab VIEW program was created and utilised to interrogate the highest absorbing wavelength for each of the gases and absorption recorded at these specific absorbing wavelength were then input along with our measured absorption line intensities into the Beer-Lambert law to determine the concentrations of each of the gases present in the test cell. In this manner the concentrations were calculated immediately and then output to the user eliminating the need for processing the data after testing. A lower detection level of 1ppm for both NO2 and SO2 and in the order of 26ppm for NO was achieved.

Original languageEnglish
Title of host publicationPhotonic Applications for Aerospace, Transportation, and Harsh Environments
DOIs
Publication statusPublished - 2006
EventPhotonic Applications for Aerospace, Transportation, and Harsh Environments - Boston, MA, United States
Duration: 3 Oct 20063 Oct 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6379
ISSN (Print)0277-786X

Conference

ConferencePhotonic Applications for Aerospace, Transportation, and Harsh Environments
Country/TerritoryUnited States
CityBoston, MA
Period3/10/063/10/06

Keywords

  • Emission regulations
  • Pollution monitoring
  • Spectroscopy
  • uv gas sensor

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