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Mathod for measuring temperature, molecular composition or molecular densities in gases
Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK). (Fotonik)ORCID iD: 0000-0002-4826-019X
2001 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

A measuring technique and method are provided to simultaneously determine the molecular density of several molecular species and the temperature within a closed process room in a melting or combustion process. In such processes in the industry, e.g. in metallurgic process industry, it is important to determine the temperature and the contents within the gas or flame without physically connect to or disturb the process. This has shown to raise large problems especially at high temperatures. The radio signal over a frequency band is measured on the outside of the process room through a window in the mantel covering as a function of frequency and registered on a computer as a radio spectrum. The system is calibrated by using a known signal transmitted through the process room. The spectral lines are identified by their frequency from a database. The temperature is determined from several lines of the same molecular specie and the molecular densities are determined from the intensities of the lines. The method is suitable to determine vibrational and rotational excitation of molecular species in the radio wavelength range of 30 micrometers to 500 meters. The densities of molecular species and the temperature can be imaged in three dimensions inside the process room or exhaust channel if interferometers are used for simultaneous two dimensional imaging from several azimuth directions.

Place, publisher, year, edition, pages
2001.
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:hh:diva-3626OAI: oai:DiVA.org:hh-3626DiVA, id: diva2:281768
Patent
US 6,244,743 (2001-06-12)Available from: 2009-12-17 Created: 2009-12-17 Last updated: 2013-11-15Bibliographically approved

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Bååth, Lars

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf