BR9813478A - Sensor para gases múltiplos - Google Patents

Sensor para gases múltiplos

Info

Publication number
BR9813478A
BR9813478A BR9813478-7A BR9813478A BR9813478A BR 9813478 A BR9813478 A BR 9813478A BR 9813478 A BR9813478 A BR 9813478A BR 9813478 A BR9813478 A BR 9813478A
Authority
BR
Brazil
Prior art keywords
interest
spectral
gases
polarization components
orthogonal polarization
Prior art date
Application number
BR9813478-7A
Other languages
English (en)
Inventor
Glen W Sachse
Liang-Guo Wang
Peter J Lebel
Tommy C Steele
Mauro Rana
Original Assignee
Nasa
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 Nasa filed Critical Nasa
Publication of BR9813478A publication Critical patent/BR9813478A/pt

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
    • G01N21/3518—Devices using gas filter correlation techniques; Devices using gas pressure modulation techniques
    • 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

Abstract

Patente de Invenção: <B>"SENSOR PARA GASES MúLTIPLOS"<D>. Um sensor de gases múltiplos é provido, o qual modula um feixe de luz polarizada sobre uma faixa larga de comprimentos de onda entre dois componentes de polarização ortogonal alternantes. Os dois componentes de polarização ortogonais do feixe modulado por polarização são dirigidos ao longo de duas trajetórias óticas distintas. Pelo menos uma trajetória ótica contém um ou mais meios de diferenciação espectral, com cada meio de diferenciação espectral possuindo características de absorção espectral de um ou mais gases de interesse sendo medidos. O feixe modulado por polarização combinado é segmentado em uma ou mais regiões espectrais menores de interesse onde um ou mais gases de interesse têm uma faixa de absorção. A diferença de internsidade entre os dois componentes de polarização ortogonais é então determinada em cada região espectral segmentada de interesse como uma indicação da emissão/absorção espectral do feixe de luz pelos gases de interesse na trajetória de medição, a qual contém a concentração dos gases de interesse.
BR9813478-7A 1997-12-08 1998-12-07 Sensor para gases múltiplos BR9813478A (pt)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US6791797P 1997-12-08 1997-12-08
US7382298P 1998-02-05 1998-02-05
US09/019,473 US6008928A (en) 1997-12-08 1998-02-05 Multi-gas sensor
PCT/US1998/025908 WO1999030134A1 (en) 1997-12-08 1998-12-07 Multi-gas sensor

Publications (1)

Publication Number Publication Date
BR9813478A true BR9813478A (pt) 2000-11-14

Family

ID=27361230

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9813478-7A BR9813478A (pt) 1997-12-08 1998-12-07 Sensor para gases múltiplos

Country Status (8)

Country Link
US (1) US6008928A (pt)
EP (1) EP1038166A1 (pt)
JP (1) JP2001526385A (pt)
KR (1) KR20010032817A (pt)
AU (1) AU747390B2 (pt)
BR (1) BR9813478A (pt)
CA (1) CA2313387A1 (pt)
WO (1) WO1999030134A1 (pt)

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US20080309935A1 (en) * 2007-06-17 2008-12-18 Bo Ling Method for Methane Spectral Absorbance Calculation Using Sunlight
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US10395895B2 (en) * 2015-08-27 2019-08-27 Mks Instruments, Inc. Feedback control by RF waveform tailoring for ion energy distribution
KR101788142B1 (ko) 2017-03-31 2017-10-20 주식회사 이엘티센서 가스센서용 광 공동 및 이 광 공동을 갖는 가스센서
US10876898B2 (en) * 2018-08-08 2020-12-29 National Technology & Engineering Solutions Of Sandia, Llc Passive millimeter wave radiometer system for calibration of infrared cameras
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Also Published As

Publication number Publication date
AU1996999A (en) 1999-06-28
CA2313387A1 (en) 1999-06-17
KR20010032817A (ko) 2001-04-25
WO1999030134A1 (en) 1999-06-17
JP2001526385A (ja) 2001-12-18
AU747390B2 (en) 2002-05-16
EP1038166A1 (en) 2000-09-27
US6008928A (en) 1999-12-28

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Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 5A,6A,7A E 8A ANUIDADES.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1910 DE 14/08/2007.