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1. WO2022024407 - GAS CONCENTRATION DETECTION DEVICE

Publication Number WO/2022/024407
Publication Date 03.02.2022
International Application No. PCT/JP2020/041199
International Filing Date 04.11.2020
IPC
G01N 21/01 2006.1
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
01Arrangements or apparatus for facilitating the optical investigation
G01N 21/33 2006.1
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
33using ultra-violet light
G01N 21/3504 2014.1
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
35using infra-red light
3504for analysing gases, e.g. multi-gas analysis
CPC
G01N 21/01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
01Arrangements or apparatus for facilitating the optical investigation
G01N 21/33
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
33using ultra-violet light
G01N 21/3504
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
35using infra-red light
3504for analysing gases, e.g. multi-gas analysis
Applicants
  • 株式会社トラステック愛知 TRUSTEC AICHI CORP [JP]/[JP]
Inventors
  • 柴田 修 SHIBATA Osamu
  • 辻 武彦 TUJI Takehiko
Agents
  • 森岡智昭 MORIOKA Tomoaki
Priority Data
2020-12703628.07.2020JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) GAS CONCENTRATION DETECTION DEVICE
(FR) DISPOSITIF DE DÉTECTION DE CONCENTRATION DE GAZ
(JA) ガス濃度検知装置
Abstract
(EN) [Problem] To provide a gas concentration detection device that is capable of appropriately detecting the concentration of a target gas in a measurement gas without frequently updating a calibration factor using a reference gas and a clean gas. [Solution] A gas concentration detection device 1 is provided with a calibration/attenuation filter 23F for reducing the light intensity 22OLI of outgoing light 22OL to be reached an outgoing light detection unit 24. A signal processing unit 25 obtains the concentration ch of a target gas GJ in a measurement gas GH on the basis of a calibration signal SC which is obtained when a gas container 22 is filled with a clean gas GA and the light intensity of the outgoing light is attenuated by the calibration/attenuation filter, a clean gas signal SA which is obtained when the gas container is filled with a clean gas and no attenuation is caused by the calibration/attenuation filter, a measurement gas signal SH which is obtained before or after the calibration signal SC and the clean gas signal SA and which is obtained when the gas container 22 is filled with the measurement gas GH and no attenuation is caused by the calibration/attenuation filter, and a calibration factor kf of the calibration/attenuation filter.
(FR) Le problème à résoudre par la présente invention est de fournir un dispositif de détection de concentration de gaz apte à détecter de manière appropriée la concentration d'un gaz cible dans un gaz de mesure sans mettre à jour fréquemment un facteur d'étalonnage à l'aide d'un gaz de référence et d'un gaz propre. La solution selon l'invention porte sur un dispositif de détection de concentration de gaz (1) pourvu d'un filtre d'étalonnage/d'atténuation (23F) permettant de réduire l'intensité lumineuse (22OLI) de la lumière sortante (22OL) devant atteindre une unité de détection de lumière sortante (24). Une unité de traitement de signal (25) obtient la concentration (ch) d'un gaz cible (GJ) dans un gaz de mesure (GH) en fonction d'un signal d'étalonnage (SC) obtenu lorsqu'un récipient de gaz (22) est rempli d'un gaz propre (GA) et que l'intensité lumineuse de la lumière sortante est atténuée par le filtre d'étalonnage/atténuation, d'un signal de gaz propre (SA) obtenu lorsque le récipient de gaz est rempli d'un gaz propre et qu'aucune atténuation n'est provoquée par le filtre d'étalonnage/d'atténuation, d'un signal de gaz de mesure (SH) obtenu avant ou après le signal d'étalonnage (SC) et le signal de gaz propre (SA) et obtenu lorsque le récipient de gaz (22) est rempli du gaz de mesure (GH) et qu'aucune atténuation n'est provoquée par le filtre d'étalonnage/d'atténuation, et un facteur d'étalonnage (kf) du filtre d'étalonnage/atténuation.
(JA) 【課題】頻繁に標準ガスと清浄ガスを用いて校正係数を更新しなくとも、適切に被測定ガ ス中の目標ガスの濃度を検知できるガス濃度検知装置を提供すること。 【解決手段】ガス濃度検知装置1は、出射光検出部24に届く出射光22OLの光強度22OLIを減 少させる校正減光フィルタ23Fを備え、信号処理部25は、ガス容器22が清浄ガスGAで満た され、かつ、校正減光フィルタで出射光の光強度を減少させたときに得られる校正信号S Cと、ガス容器が清浄ガスで満たされ、かつ、校正減光フィルタによる減光を生じさせな いときに得られる清浄ガス信号SAと、校正信号SC及び清浄ガス信号SAと相前後して 得られ、ガス容器22が被測定ガスGHで満たされ、かつ、校正減光フィルタによる減光を生 じさせないときに得られる被測定ガス信号SHと、校正減光フィルタに与えられた校正係 数kfとから、被測定ガスGH中の目標ガスGJの濃度chを取得する。
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