GB2228568B - Selective gas detecting apparatus - Google Patents

Selective gas detecting apparatus

Info

Publication number
GB2228568B
GB2228568B GB9002234A GB9002234A GB2228568B GB 2228568 B GB2228568 B GB 2228568B GB 9002234 A GB9002234 A GB 9002234A GB 9002234 A GB9002234 A GB 9002234A GB 2228568 B GB2228568 B GB 2228568B
Authority
GB
United Kingdom
Prior art keywords
detecting apparatus
gas detecting
selective gas
selective
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.)
Expired - Fee Related
Application number
GB9002234A
Other versions
GB9002234D0 (en
GB2228568A (en
Inventor
Ulrich Bonne
Robert J Matthys
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.)
GTI Energy
Original Assignee
Gas Research Institute
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
Priority claimed from US07/308,468 external-priority patent/US4996431A/en
Priority claimed from US07/308,469 external-priority patent/US4958076A/en
Application filed by Gas Research Institute filed Critical Gas Research Institute
Publication of GB9002234D0 publication Critical patent/GB9002234D0/en
Publication of GB2228568A publication Critical patent/GB2228568A/en
Application granted granted Critical
Publication of GB2228568B publication Critical patent/GB2228568B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/16—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors
    • G01J1/1626—Arrangements with two photodetectors, the signals of which are compared
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/16—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors
    • G01J2001/161—Ratio method, i.e. Im/Ir
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J2001/4242—Modulated light, e.g. for synchronizing source and detector circuit
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
    • G01N2021/3166—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths using separate detectors and filters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/12—Circuits of general importance; Signal processing
    • G01N2201/121—Correction signals
    • G01N2201/1215—Correction signals for interfering gases

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
GB9002234A 1989-02-10 1990-02-01 Selective gas detecting apparatus Expired - Fee Related GB2228568B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/308,468 US4996431A (en) 1989-02-10 1989-02-10 Selective gas detecting apparatus
US07/308,469 US4958076A (en) 1989-02-10 1989-02-10 Selective natural gas detecting apparatus

Publications (3)

Publication Number Publication Date
GB9002234D0 GB9002234D0 (en) 1990-03-28
GB2228568A GB2228568A (en) 1990-08-29
GB2228568B true GB2228568B (en) 1993-07-07

Family

ID=26976265

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9002234A Expired - Fee Related GB2228568B (en) 1989-02-10 1990-02-01 Selective gas detecting apparatus

Country Status (2)

Country Link
JP (1) JPH02284046A (en)
GB (1) GB2228568B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2539707B2 (en) * 1991-03-27 1996-10-02 大塚電子株式会社 Absorption spectrum correction method and light diffusing substance spectroscopic measurement apparatus using the method
FR2776776B1 (en) * 1998-03-24 2000-04-28 Schlumberger Ind Sa DEVICE AND METHOD FOR DIRECT MEASUREMENT OF THE CALORIFIC ENERGY CONTAINED IN A FUEL GAS
DE19921167A1 (en) * 1999-02-24 2000-08-31 Ruhrgas Ag Method and arrangement for measuring the calorific value and / or the Wobbe index of fuel gas, in particular natural gas
DE19911260A1 (en) * 1999-03-13 2000-09-14 Leybold Vakuum Gmbh Infrared gas analyzer and method for operating this analyzer
US6789021B2 (en) 2001-08-16 2004-09-07 Spx Corporation Method and system for detection of hydrocarbon species in a gas
JP3899004B2 (en) * 2002-09-27 2007-03-28 株式会社堀場製作所 In-vehicle HC measuring device
JP2009115654A (en) * 2007-11-07 2009-05-28 Toyota Motor Corp Hydrocarbon concentration measuring instrument, and hydrocarbon concentration measuring method

Also Published As

Publication number Publication date
JPH02284046A (en) 1990-11-21
GB9002234D0 (en) 1990-03-28
GB2228568A (en) 1990-08-29

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940201