JP4227991B2 - 排ガス分析装置および排ガス分析方法 - Google Patents
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
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- 239000001569 carbon dioxide Substances 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- 239000010931 gold Substances 0.000 description 1
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- 239000012780 transparent material Substances 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
- G01N21/31—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
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
- G01N21/532—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke with measurement of scattering and transmission
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- 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
- 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
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/075—Investigating concentration of particle suspensions by optical means
-
- 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
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N2021/4704—Angular selective
- G01N2021/4726—Detecting scatter at 90°
-
- 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
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/51—Scattering, i.e. diffuse reflection within a body or fluid inside a container, e.g. in an ampoule
- G01N2021/516—Multiple excitation of scattering medium, e.g. by retro-reflected or multiply reflected excitation rays
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- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Dispersion Chemistry (AREA)
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- Investigating Or Analysing Materials By Optical Means (AREA)
Description
C=−ln(I/I0)/kL…(1)
濃度C=粒子濃度c(B)×f(A)…(2)
Claims (7)
- 内燃機関から排出される排ガスにレーザ光を照射して排ガスを分析する装置であって、
前記排ガスを導入する排気管と、
該排気管に装着されるセンサ部であって、
該排気管を流れる排ガスの流れに対して直交する方向にレーザ光を照射する光照射部と、
該光照射部から照射され、該排ガスを透過した該レーザ光を、該排ガスの流れに対して直行する方向に反射して該排ガスを透過させるミラーと、
該排ガス中を透過した後のレーザ光を受光する透過光受光部と、
前記レーザ光の照射により排ガス中に含まれる粒子状物質から生じるミー散乱光を受光する散乱光受光部と、
を備えるセンサ部と、
レーザ発振・受光コントローラ部と、
前記透過光受光部から得られる透過光強度の受光データに基づいて排ガス中の成分の濃度を算出すると共に、前記散乱光受光部から得られる散乱光強度の実測データに基づいて排ガス中に含まれる粒子状物質の濃度を算出する算出部と、
を備えることを特徴とする排ガス分析装置。 - 前記算出部は、粒径毎に特定されるミー散乱光強度に関する理論値データを格納するデータ格納部を備えており、散乱光受光部で得られるミー散乱光強度の実測データと、データ格納部に収納され粒径毎に特定される理論値データとに基づき排ガス中の前記粒子状物質の濃度を算出することを特徴とする請求項1に記載の排ガス分析装置。
- 前記散乱光受光部を複数個備え、前記算出部は複数の散乱光受光部で得られたミー散乱光強度の実測データの平均値を演算する手段をさらに備えることを特徴とする請求項2に記載の排ガス分析装置。
- 前記センサ部を複数備え、前記レーザ発振・受光コントローラ部は、複数のレーザダイオードと複数の分波器と複数の合波器と複数の差分型光検出器を備え、前記複数のレーザダイオードの各ダイオードが、検出対象となる排ガス中の各成分に固有の吸収スペクトルに対応するピーク波長を持つ赤外レーザ光を発生させ、前記分波器が、前記赤外レーザ光をセンサ部の数だけ分波し、前記合波器は前記分波された異なるピーク波長を持つ赤外レーザ光を合波して前記光照射部に送り、前記差分型光検出器が前記の合波光と前記透過光受光部からの受光の差分をとることを特徴とする請求項1に記載の排ガス分析装置。
- 内燃機関から排出される排ガスが流れる排気管内にレーザ光を照射して排ガスを分析する方法であって、
前記レーザ光を排ガス中に照射し、排ガス中を透過したレーザ光をミラーによって反射して排ガス中を透過させるようにして排ガス中を複数回通過したレーザ光を受光し、受光されたレーザ光に基づいて前記排ガス中に含まれる成分の濃度を算出し、
前記レーザ光を照射したときに排ガス中に含まれる粒子状物質から生じるミー散乱光を受光し、受光されたミー散乱光強度の実測データに基づいて前記粒子状物質の濃度を算出することを特徴とする排ガス分析方法。 - 前記粒子状物質の濃度の算出は、前記ミー散乱光強度の実測データと、粒径毎に特定されるミー散乱光強度に関する理論値データとに基づいて行われることを特徴とする請求項5に記載の排ガス分析方法。
- 前記粒子状物質の濃度の算出は、排ガス中に含まれる粒子状物質からのミー散乱光強度の実測データを波長ごとに連続させたパターンデータを用いて行われ、
実測したミー散乱光強度の前記パターンデータと粒径毎に特定されるミー散乱光強度に関する理論値パターンデータとを比較して、実測したミー散乱光強度の前記パターンデータに近似した理論値パターンデータを選択する工程、
選択した理論値パターンデータでの最大値を取得し、取得した値から理論値データでの粒子状物質の理論値濃度を算出する工程、
算出された粒子状物質の理論値濃度を実測したミー散乱光強度の計測値で補正して実際の粒子状物質濃度を算出する工程、
を含むことを特徴とする請求項6に記載の排ガス分析方法。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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JP2005379499A JP4227991B2 (ja) | 2005-12-28 | 2005-12-28 | 排ガス分析装置および排ガス分析方法 |
CN2006800493924A CN101346619B (zh) | 2005-12-28 | 2006-12-27 | 废气分析器及废气分析方法 |
US12/159,042 US7926332B2 (en) | 2005-12-28 | 2006-12-27 | Exhaust gas analyzer and exhaust gas analyzing method |
PCT/JP2006/326380 WO2007077966A1 (ja) | 2005-12-28 | 2006-12-27 | 排ガス分析装置および排ガス分析方法 |
EP06847328A EP1972925A4 (en) | 2005-12-28 | 2006-12-27 | EXHAUST GAS ANALYSIS DEVICE AND EXHAUST GAS ANALYSIS PROCEDURE |
KR20087018342A KR100998692B1 (ko) | 2005-12-28 | 2006-12-27 | 배기가스 분석장치 및 배기가스 분석방법 |
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JP2005379499A JP4227991B2 (ja) | 2005-12-28 | 2005-12-28 | 排ガス分析装置および排ガス分析方法 |
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JP4227991B2 true JP4227991B2 (ja) | 2009-02-18 |
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US (1) | US7926332B2 (ja) |
EP (1) | EP1972925A4 (ja) |
JP (1) | JP4227991B2 (ja) |
KR (1) | KR100998692B1 (ja) |
CN (1) | CN101346619B (ja) |
WO (1) | WO2007077966A1 (ja) |
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CN101346619A (zh) | 2009-01-14 |
KR100998692B1 (ko) | 2010-12-07 |
EP1972925A1 (en) | 2008-09-24 |
US7926332B2 (en) | 2011-04-19 |
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