JP7492269B2 - 濃度測定装置 - Google Patents
濃度測定装置 Download PDFInfo
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- 238000005259 measurement Methods 0.000 claims description 122
- 230000003287 optical effect Effects 0.000 claims description 36
- 239000012530 fluid Substances 0.000 claims description 28
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- 238000010521 absorption reaction Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 description 94
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 24
- 238000002834 transmittance Methods 0.000 description 10
- 238000002835 absorbance Methods 0.000 description 9
- 239000013307 optical fiber Substances 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 229910052594 sapphire Inorganic materials 0.000 description 7
- 239000010980 sapphire Substances 0.000 description 7
- 239000010408 film Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910001634 calcium fluoride Inorganic materials 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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- 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
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
- G01N21/274—Calibration, base line adjustment, drift correction
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- 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
- G01N21/59—Transmissivity
- G01N21/61—Non-dispersive gas analysers
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/031—Multipass arrangements
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/05—Flow-through cuvettes
-
- 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
- G01N21/1717—Systems in which incident light is modified in accordance with the properties of the material investigated with a modulation of one or more physical properties of the sample during the optical investigation, e.g. electro-reflectance
-
- 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
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- 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
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
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- G—PHYSICS
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- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/031—Multipass arrangements
- G01N2021/0314—Double pass, autocollimated path
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- 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
- G01N21/1717—Systems in which incident light is modified in accordance with the properties of the material investigated with a modulation of one or more physical properties of the sample during the optical investigation, e.g. electro-reflectance
- G01N2021/1731—Temperature modulation
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- G01—MEASURING; TESTING
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- 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
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/4133—Refractometers, e.g. differential
- G01N2021/414—Correcting temperature effect in refractometers
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- 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
- G01N2201/1211—Correction signals for temperature
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- G01N2201/1218—Correction signals for pressure variations
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- Theoretical Computer Science (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
Cv+ΔCn=(RT/αaLPt)・ln(I0/I+I(n))=(RT/αaLPt)・ln(I0/I)+ΔCn
(sinθA/sinθB)=nB/nA=nAB
n(P、T)=1+(n(0℃、1atm)/(1+αT))×P/1.01325×105
Aλ=-log10(I/I0)=α’LCM ・・・(1)
ln(I0/I)=αL(P/RT) ・・・(2)
ln(I0/I)=αaL(Pt・Cv/RT) ・・・(3)
Cv=(RT/αaLPt)・ln(I0/I) ・・・(4)
Cv’=(RT/αaLPt)・ln(I0/I(n)) ・・・(5)
ここで、I(n)は、セル内の媒質の屈折率を考慮した透過光強度を表しており、I(n)=I+ΔI(n)、すなわち、光検出器の検出した透過光強度Iと、屈折率による光強度変化分との和に対応する。
Cv+ΔCn
=(RT/αaLPt)・ln(I0/(I+ΔI(n)))
=(RT/αaLPt)・ln(I0/I)+ΔCn ・・・(6)
2 窓部
3 コリメータ
3A 凸レンズ
4 反射部材
5 圧力センサ
6 温度センサ
10 流体ユニット
11 光ファイバケーブル(入射用)
12 光ファイバケーブル(出射用)
20 電気ユニット
22 光源
24 光検出器
26 参照光検出器
28 演算回路
100 濃度測定装置
Claims (3)
- 光源および光検出器を有する電気ユニットと、
測定セルを有する流体ユニットと、
前記光源からの光を前記測定セルに伝送するための第1光伝送部材と、
前記測定セルからの光を前記光検出器に伝送するための第2光伝送部材と、
前記流体ユニットに設けられたレンズであって、前記レンズの光軸とは異なる第1の位置に前記第1光伝送部材からの入射光が入射され、かつ/または、前記レンズの光軸および前記第1の位置とは異なる第2の位置から前記第2光伝送部材に出射光を出射するように配置されたレンズと、
前記測定セルを流れる流体の圧力を測定する圧力センサと、
前記光検出器に接続され、前記測定セルを流れる流体の濃度を検出する演算回路と
を備え、
前記演算回路は、前記圧力センサが出力する圧力および前記流体の濃度に関連付けられた補正ファクタを記載するテーブルを格納したメモリを有し、前記流体の屈折率の変化によって生じる、前記測定セルにおける光路変化による測定誤差を補正するために、前記光検出器の出力と、前記テーブルから読み出された補正ファクタとに基づいて前記流体の濃度を演算により求めるように構成されている、濃度測定装置。 - 前記測定セルを流れるガスの温度を測定する温度センサをさらに有し、
前記演算回路は、測定ガスに関連付けられた吸光係数αaを用いて、下記の式に基づいて混合ガス中の測定ガスの体積濃度Cv+ΔCnを求めるように構成されており、下記の式において、I0は前記測定セルに入射する入射光の強度、Iは前記測定セルを通過した光の強度、Rは気体定数、Tは前記測定セル内のガス温度、Lは光路長、Ptは前記測定セル内のガス圧力、I(n)は屈折率変化に基づく光量変化であり、ΔCnは(RT/αaLPt)・ln(I0/I)と前記ガス圧力とに基づいて決定される補正ファクタである、請求項1に記載の濃度測定装置。
Cv+ΔCn=(RT/αaLPt)・ln(I0/I+I(n))=(RT/αaLPt)・ln(I0/I)+ΔCn - 前記補正ファクタは、前記測定セルの内部の流体が吸収しない波長の光を用いて、予め測定され前記メモリに格納されたものである、請求項1または2に記載の濃度測定装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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JP2019169331 | 2019-09-18 | ||
JP2019169331 | 2019-09-18 | ||
PCT/JP2020/032827 WO2021054097A1 (ja) | 2019-09-18 | 2020-08-31 | 濃度測定装置 |
Publications (2)
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JPWO2021054097A1 JPWO2021054097A1 (ja) | 2021-03-25 |
JP7492269B2 true JP7492269B2 (ja) | 2024-05-29 |
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US (1) | US20220283081A1 (ja) |
JP (1) | JP7492269B2 (ja) |
KR (1) | KR20220035249A (ja) |
CN (1) | CN114270169A (ja) |
TW (1) | TWI751684B (ja) |
WO (1) | WO2021054097A1 (ja) |
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US11708760B2 (en) * | 2019-03-12 | 2023-07-25 | Baker Hughes Oilfield Operations Llc | Immersed lens downhole refractometer |
Citations (6)
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JP2009506330A (ja) | 2005-08-26 | 2009-02-12 | ゼテテック インスティテュート | 波面干渉における大気の乱れによる影響の測定及び補正のための装置及び方法 |
US20160178362A1 (en) | 2014-12-19 | 2016-06-23 | Hexagon Technology Center Gmbh | Method of actively counteracting displacement forces with a probing unit |
WO2016117173A1 (ja) | 2015-01-20 | 2016-07-28 | 株式会社 東芝 | 呼気測定装置および呼気測定方法、並びにガスセル |
WO2018021311A1 (ja) | 2016-07-29 | 2018-02-01 | 国立大学法人徳島大学 | 濃度測定装置 |
US20180045500A1 (en) | 2016-02-04 | 2018-02-15 | Zhejiang Sci-Tech University | Method of air refractive index correction for absolute long distance measurement |
JP2018025499A (ja) | 2016-08-12 | 2018-02-15 | 株式会社フジキン | 濃度測定装置 |
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JP3411348B2 (ja) * | 1993-09-30 | 2003-05-26 | マツダ株式会社 | 排気成分濃度検出装置 |
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JPH10221020A (ja) * | 1997-02-07 | 1998-08-21 | Nikon Corp | 測長システム |
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JP5885699B2 (ja) | 2013-05-09 | 2016-03-15 | 株式会社フジキン | 脆性破壊性光透過窓板の固定構造及びこれを用いた脆性破壊性光透過窓板の固定方法 |
CN105556282A (zh) * | 2013-09-24 | 2016-05-04 | 通用电气健康护理生物科学股份公司 | 光学吸收监测系统 |
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-
2020
- 2020-08-31 US US17/637,617 patent/US20220283081A1/en active Pending
- 2020-08-31 CN CN202080058213.3A patent/CN114270169A/zh active Pending
- 2020-08-31 WO PCT/JP2020/032827 patent/WO2021054097A1/ja active Application Filing
- 2020-08-31 KR KR1020227005685A patent/KR20220035249A/ko not_active Application Discontinuation
- 2020-08-31 JP JP2021546581A patent/JP7492269B2/ja active Active
- 2020-09-08 TW TW109130699A patent/TWI751684B/zh active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009506330A (ja) | 2005-08-26 | 2009-02-12 | ゼテテック インスティテュート | 波面干渉における大気の乱れによる影響の測定及び補正のための装置及び方法 |
US20160178362A1 (en) | 2014-12-19 | 2016-06-23 | Hexagon Technology Center Gmbh | Method of actively counteracting displacement forces with a probing unit |
WO2016117173A1 (ja) | 2015-01-20 | 2016-07-28 | 株式会社 東芝 | 呼気測定装置および呼気測定方法、並びにガスセル |
US20180045500A1 (en) | 2016-02-04 | 2018-02-15 | Zhejiang Sci-Tech University | Method of air refractive index correction for absolute long distance measurement |
WO2018021311A1 (ja) | 2016-07-29 | 2018-02-01 | 国立大学法人徳島大学 | 濃度測定装置 |
JP2018025499A (ja) | 2016-08-12 | 2018-02-15 | 株式会社フジキン | 濃度測定装置 |
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TWI751684B (zh) | 2022-01-01 |
TW202119016A (zh) | 2021-05-16 |
US20220283081A1 (en) | 2022-09-08 |
CN114270169A (zh) | 2022-04-01 |
KR20220035249A (ko) | 2022-03-21 |
WO2021054097A1 (ja) | 2021-03-25 |
JPWO2021054097A1 (ja) | 2021-03-25 |
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