NO901793L - Fremgangsmaate og apparat for fjernmaaling av gass. - Google Patents

Fremgangsmaate og apparat for fjernmaaling av gass.

Info

Publication number
NO901793L
NO901793L NO90901793A NO901793A NO901793L NO 901793 L NO901793 L NO 901793L NO 90901793 A NO90901793 A NO 90901793A NO 901793 A NO901793 A NO 901793A NO 901793 L NO901793 L NO 901793L
Authority
NO
Norway
Prior art keywords
light signal
frequency
gas
interest
spectra
Prior art date
Application number
NO90901793A
Other languages
English (en)
Other versions
NO901793D0 (no
Inventor
Frederick Merk Ryan
Milton S Gottlieb
Original Assignee
Rosemount Analytical Inc
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 Rosemount Analytical Inc filed Critical Rosemount Analytical Inc
Publication of NO901793D0 publication Critical patent/NO901793D0/no
Publication of NO901793L publication Critical patent/NO901793L/no

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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/12—Generating the spectrum; Monochromators
    • G01J3/26—Generating the spectrum; Monochromators using multiple reflection, e.g. Fabry-Perot interferometer, variable interference filters
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G01J2003/2886—Investigating periodic spectrum
    • 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
    • G01N2021/3513—Open path with an instrumental source
    • 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
    • G01N2201/06—Illumination; Optics
    • G01N2201/067—Electro-optic, magneto-optic, acousto-optic elements

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

Et apparat for fjernmåling av gass og en fremgangsmåte anvender de karakteristiske optiske absorpsjonslinjer for å bestemme mengder av en aktuell gass som kan forekomme i det område som studeres. Apparatet for fjernmåling av gass omfatter en elektromagnetisk strålingskilde (12) som kan innrettes mot det aktuelle området, og et arrangement (14) for oppsamling av lys. Det mottatte lyssignal ledes til en hurtig lysbrytermodulator (10) som modulerer lyssignalet til en første frekvens. Et andre modulerings- arrangement (40) modulerer lyssignalet til den andre freekvens og omfatter en dobbeltbrytende etalonanordning (42) som har en periodisk avstand lik periodisiteten til absorpsjonslinjene for den aktuelle gass. Den andre moduleringsanordning fungerer videre slik at når et elektrisk felt (48) påtrykkes, skiftes transmisjons- spektra tilhørende lyssignalet mellom spektra som sammenfaller med absorpsjonslinjene og spektra som faller mellom absorpsjons- linjene. Deretter kondisjoneres lyssignalet fra etalonanordningen og ledes til en detektorenhet (56) som skiller mellom lyssignalet ved den første frekvens og lyssignalet ved den andre frekvens for å bestemme minst en mengde av den aktuelle gass.
NO90901793A 1989-05-01 1990-04-24 Fremgangsmaate og apparat for fjernmaaling av gass. NO901793L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/345,858 US5076699A (en) 1989-05-01 1989-05-01 Method and apparatus for remotely and portably measuring a gas of interest

Publications (2)

Publication Number Publication Date
NO901793D0 NO901793D0 (no) 1990-04-24
NO901793L true NO901793L (no) 1990-11-02

Family

ID=23356794

Family Applications (1)

Application Number Title Priority Date Filing Date
NO90901793A NO901793L (no) 1989-05-01 1990-04-24 Fremgangsmaate og apparat for fjernmaaling av gass.

Country Status (7)

Country Link
US (1) US5076699A (no)
EP (1) EP0396320B1 (no)
JP (1) JPH0363547A (no)
AT (1) ATE120275T1 (no)
CA (1) CA2014876C (no)
DE (1) DE69017942T2 (no)
NO (1) NO901793L (no)

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US5210702A (en) * 1990-12-26 1993-05-11 Colorado Seminary Apparatus for remote analysis of vehicle emissions
US5401967A (en) * 1990-12-26 1995-03-28 Colorado Seminary Dba University Of Denver Apparatus for remote analysis of vehicle emissions
US5245408A (en) * 1991-01-11 1993-09-14 The United States Of America As Represented By The Director, National Security Agency Electro-optic coherent light detector
GB9115158D0 (en) * 1991-07-12 1991-08-28 Secr Defence Optical signal processing
US5323229A (en) * 1992-08-31 1994-06-21 Science Applications International Corporation Measurement system using optical coherence shifting interferometry
US5451787A (en) * 1993-05-04 1995-09-19 Westinghouse Electric Corporation Hazardous air pollutants monitor
DE4320038C1 (de) * 1993-06-17 1994-12-15 Fraunhofer Ges Forschung Anordnung zum Bewerten eines Meßsignals nach Betrag und Phase in Bezug auf ein Referenzsignal
US5440388A (en) * 1993-08-02 1995-08-08 Erickson; Jon W. Chemical analysis and imaging by discrete fourier transform spectroscopy
US5438406A (en) * 1993-10-07 1995-08-01 The Titan Corporation Tunable narrowband spectrometer with acousto-optical tunable filter
US5444528A (en) * 1994-07-27 1995-08-22 The Titan Corporation Tunable spectrometer with acousto-optical tunable filter
US5696586A (en) * 1995-03-21 1997-12-09 Sci-Tec Instruments Inc. Optical correlation gas analyzer
US5698853A (en) * 1995-04-18 1997-12-16 Nikon Corporation Infrared image pickup apparatus
US5909303A (en) * 1996-01-04 1999-06-01 The Board Of Trustees Of The Leland Stanford Junior University Optical modulator and optical modulator array
US5946095A (en) * 1996-03-08 1999-08-31 Gas Research Institute Natural gas detection apparatus and method operable in a moving vehicle
GB2314617B (en) * 1996-06-24 2000-08-23 Graviner Ltd Kidde High sensitivity gas detection
US5831267A (en) * 1997-02-24 1998-11-03 Envirotest Systems Corp. Method and apparatus for remote measurement of exhaust gas
US6008928A (en) * 1997-12-08 1999-12-28 The United States As Represented By The Administrator Of The National Aeronautics And Space Administration Multi-gas sensor
US6574031B1 (en) 1997-12-08 2003-06-03 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Method for balancing detector output to a desired level of balance at a frequency
US6057923A (en) * 1998-04-20 2000-05-02 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Optical path switching based differential absorption radiometry for substance detection
DE19909631A1 (de) * 1999-03-05 2000-09-14 Heraeus Noblelight Gmbh Tragbare Miniatur-Spektralsonde
EP1234164A1 (en) 1999-12-02 2002-08-28 Ecolotrol, Inc. A filter
US6561027B2 (en) 2000-12-29 2003-05-13 Spx Corporation Support structure for system for measuring vehicle speed and/or acceleration
US6781110B2 (en) * 2000-12-29 2004-08-24 Spx Corporation Apparatus and method for measuring vehicle speed and/or acceleration
US6750444B2 (en) 2000-12-29 2004-06-15 Spx Corporation Apparatus and method for measuring vehicle speed and/or acceleration
US6734422B2 (en) 2001-03-21 2004-05-11 Euv Llc Portable outgas detection apparatus
US6576905B2 (en) 2001-06-14 2003-06-10 Gas Research Institute Method and assembly for gas detection via a convergent birefringent filter
US6745613B2 (en) 2001-08-13 2004-06-08 Spx Corporation Method and system for determining the type of fuel used to power a vehicle
US6857262B2 (en) 2001-08-16 2005-02-22 Spx Corporation Catalytic converter function detection
US7183945B2 (en) * 2001-08-17 2007-02-27 Spx Corporation Method and system for video capture of vehicle information
US20030034889A1 (en) 2001-08-20 2003-02-20 Rendahl Craig S. Host system and method for sensed vehicle data
US6744516B2 (en) * 2001-08-21 2004-06-01 Spx Corporation Optical path structure for open path emissions sensing
US6757607B2 (en) 2001-08-23 2004-06-29 Spx Corporation Audit vehicle and audit method for remote emissions sensing
US8599381B2 (en) 2011-01-19 2013-12-03 Massachusetts Institute Of Technology Gas detector for atmospheric species detection
US10724945B2 (en) * 2016-04-19 2020-07-28 Cascade Technologies Holdings Limited Laser detection system and method
GB201700905D0 (en) 2017-01-19 2017-03-08 Cascade Tech Holdings Ltd Close-Coupled Analyser

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NL280130A (no) * 1961-06-26
US3370503A (en) * 1963-12-09 1968-02-27 Beckman Instruments Inc Radiation comparison system
US4035643A (en) * 1974-06-11 1977-07-12 Allied Chemical Corporation Infrared gas analysis
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US4204771A (en) * 1978-05-08 1980-05-27 Arthur Shull Tuning of etalons
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US4594511A (en) * 1985-03-29 1986-06-10 Sri International Method and apparatus for double modulation spectroscopy
FR2581190B1 (fr) * 1985-04-25 1987-06-19 Elf France Detecteur interferometrique de gaz
US4652756A (en) * 1985-05-20 1987-03-24 Westinghouse Electric Corp. Automated acousto-optic infra-red analyzer system for monitoring stack emissions
GB8621438D0 (en) * 1986-09-05 1986-10-15 Secr Defence Electro-optic device
US4905169A (en) * 1988-06-02 1990-02-27 The United States Of America As Represented By The United States Department Of Energy Method and apparatus for simultaneously measuring a plurality of spectral wavelengths present in electromagnetic radiation

Also Published As

Publication number Publication date
CA2014876A1 (en) 1990-11-01
ATE120275T1 (de) 1995-04-15
DE69017942T2 (de) 1995-12-21
NO901793D0 (no) 1990-04-24
DE69017942D1 (de) 1995-04-27
US5076699A (en) 1991-12-31
EP0396320B1 (en) 1995-03-22
EP0396320A3 (en) 1991-05-08
EP0396320A2 (en) 1990-11-07
CA2014876C (en) 2001-02-20
JPH0363547A (ja) 1991-03-19

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