CA2637306C - Gas detector - Google Patents

Gas detector Download PDF

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Publication number
CA2637306C
CA2637306C CA2637306A CA2637306A CA2637306C CA 2637306 C CA2637306 C CA 2637306C CA 2637306 A CA2637306 A CA 2637306A CA 2637306 A CA2637306 A CA 2637306A CA 2637306 C CA2637306 C CA 2637306C
Authority
CA
Canada
Prior art keywords
light
laser
gas
mode optical
receiver
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 - Lifetime
Application number
CA2637306A
Other languages
English (en)
French (fr)
Other versions
CA2637306A1 (en
Inventor
John Tulip
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.)
Individual
Original Assignee
Individual
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 US08/519,027 external-priority patent/US5637872A/en
Priority claimed from US08/526,573 external-priority patent/US5748325A/en
Application filed by Individual filed Critical Individual
Publication of CA2637306A1 publication Critical patent/CA2637306A1/en
Application granted granted Critical
Publication of CA2637306C publication Critical patent/CA2637306C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
    • 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
    • G01N2021/1793—Remote sensing
    • 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
    • G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
    • G01N2021/396—Type of laser source
    • G01N2021/399—Diode laser

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
CA2637306A 1995-08-24 1996-08-16 Gas detector Expired - Lifetime CA2637306C (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US08/519,027 1995-08-24
US08/519,027 US5637872A (en) 1995-08-24 1995-08-24 Gas detector
US08/526,573 US5748325A (en) 1995-09-11 1995-09-11 Gas detector for plural target zones
US08/526,573 1995-09-11
US55171295A 1995-11-01 1995-11-01
US08/551,712 1995-11-01
CA 2183502 CA2183502C (en) 1995-08-24 1996-08-16 Gas detector

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA 2183502 Division CA2183502C (en) 1995-08-24 1996-08-16 Gas detector

Publications (2)

Publication Number Publication Date
CA2637306A1 CA2637306A1 (en) 1997-02-25
CA2637306C true CA2637306C (en) 2013-01-08

Family

ID=27414714

Family Applications (2)

Application Number Title Priority Date Filing Date
CA 2183502 Expired - Lifetime CA2183502C (en) 1995-08-24 1996-08-16 Gas detector
CA2637306A Expired - Lifetime CA2637306C (en) 1995-08-24 1996-08-16 Gas detector

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CA 2183502 Expired - Lifetime CA2183502C (en) 1995-08-24 1996-08-16 Gas detector

Country Status (2)

Country Link
CA (2) CA2183502C (de)
DE (1) DE19634191B4 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19744164A1 (de) * 1997-10-07 1999-04-08 Zae Bayern Bildgebendes Verfahren zur Detektion von Gasverteilungen in Echtheit
DE10063678A1 (de) * 2000-12-20 2002-07-18 Siemens Ag Verfahren zur selektiven Detektion von Gasen mittels Laserspektroskopie
FR2819311B1 (fr) * 2001-01-05 2003-06-13 Commissariat Energie Atomique Dispositif de mesure de concentration de gaz
NO326482B1 (no) * 2005-05-31 2008-12-15 Integrated Optoelectronics As En ny infrarod laserbasert alarm
DE102007027010B4 (de) 2007-06-08 2023-02-16 Spectro Analytical Instruments Gmbh Spektrometeroptik mit nicht-sphärischen Spiegeln
DE102011010799A1 (de) * 2011-02-09 2012-08-09 Krohne Messtechnik Gmbh Explosionsgeschütztes Gerät
CN103398966A (zh) * 2013-08-20 2013-11-20 杭州北斗星膜制品有限公司 光谱仪在有机溶液中测定tmc浓度的方法
CN106124287A (zh) * 2016-06-13 2016-11-16 山东思睿环境设备科技有限公司 高温高压消解光纤比色系统
DE102016226212A1 (de) * 2016-12-23 2018-06-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Analyseeinrichtung
JP7259813B2 (ja) * 2020-07-31 2023-04-18 横河電機株式会社 ガス分析システム及びガス分析方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3625613A (en) * 1968-06-28 1971-12-07 Avco Corp Apparatus for remote sensing and analyzing of gaseous materials using raman radiation
DE2133080C3 (de) * 1971-07-02 1974-10-17 Siemens Ag, 1000 Berlin Und 8000 Muenchen System zur optischen Kontrolle von Luftverunreinigungen in einem Großraum
US4516858A (en) * 1982-02-09 1985-05-14 The United States Of America As Represented By The Secretary Of The Air Force Multiple site laser excited pollution monitoring system
US4489239A (en) * 1982-09-24 1984-12-18 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Portable remote laser sensor for methane leak detection
FR2569864B1 (fr) * 1984-09-04 1987-01-30 Commissariat Energie Atomique Equipement d'emission et de distribution de lumiere par fibres optiques, notamment pour le controle spectrophotometrique en ligne a l'aide d'un spectrophotometre double faisceau
DE3633931A1 (de) * 1986-10-04 1988-04-07 Kernforschungsz Karlsruhe Verfahren und einrichtung zur kontinuierlichen messung der konzentration eines gasbestandteiles
DE3734401A1 (de) * 1987-10-12 1989-04-27 Fraunhofer Ges Forschung Laserabsorptionsspektrometer
DE4110095C2 (de) * 1991-03-27 1998-02-12 Draegerwerk Ag Verfahren zur gasspektroskopischen Messung der Konzentration eines Gasbestandteiles
DE4333422C1 (de) * 1993-09-30 1995-03-02 Fraunhofer Ges Forschung Verfahren und Anordnung zur Bestimmung und Normierung der Intensität eines Meßsignals, insbesondere bei der Modulations-Laser-Absorptionsspektroskopie

Also Published As

Publication number Publication date
CA2183502C (en) 2008-10-14
CA2183502A1 (en) 1997-02-25
CA2637306A1 (en) 1997-02-25
DE19634191A1 (de) 1997-02-27
DE19634191B4 (de) 2008-06-26

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Effective date: 20160816