DE102008007407A1 - Measuring cuvette for a gas analyzer and its use - Google Patents
Measuring cuvette for a gas analyzer and its use Download PDFInfo
- Publication number
- DE102008007407A1 DE102008007407A1 DE102008007407A DE102008007407A DE102008007407A1 DE 102008007407 A1 DE102008007407 A1 DE 102008007407A1 DE 102008007407 A DE102008007407 A DE 102008007407A DE 102008007407 A DE102008007407 A DE 102008007407A DE 102008007407 A1 DE102008007407 A1 DE 102008007407A1
- Authority
- DE
- Germany
- Prior art keywords
- gas
- cuvette
- measuring
- partial
- calibration
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
- 230000005855 radiation Effects 0.000 claims description 11
- 230000006978 adaptation Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 121
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006012 detection of carbon dioxide Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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
- 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
- G01N21/0303—Optical path conditioning in cuvettes, e.g. windows; adapted optical elements or systems; path modifying or adjustment
-
- 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
Landscapes
- 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)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Optical Measuring Cells (AREA)
Abstract
Die erfindungsgemäße Messküvette (5) für einen Gasanalysator (1) besteht aus mindestens drei, vorzugsweise vier, Teilküvetten (9, 10, 11, 12), wobei vorzugsweise die Länge der n-ten Teilküvette (9, 10, 11, 12) dem 2(n-1)-Fachen eine Basislänge (L) entspricht. Die Gaseinlässe (13) der Teilküvetten (9, 10, 11, 12) sind an einem Gasverteiler (14) angeschlossen, der jede Teilküvette (9, 10, 11, 12) individuell entweder mit einem Messgas (8) oder einem Nullgas (17) versorgt. Die erfindungsgemäße Messküvette (5) ermöglicht auf einfache Weise eine 2n-Punkt-Kalibrierung des Gasanalysators (1) und im Messbetrieb eine Anpassung der effektiven, mit Messgas (8) gefüllten Messküvettenlänge (L) an die zu erwartende Messgaskonzentration.The measuring cuvette (5) according to the invention for a gas analyzer (1) consists of at least three, preferably four, partial cuvettes (9, 10, 11, 12), wherein preferably the length of the nth partial cuvette (9, 10, 11, 12) 2 (n-1) times corresponds to a base length (L). The gas inlets (13) of the partial cuvettes (9, 10, 11, 12) are connected to a gas distributor (14), which connects each partial cuvette (9, 10, 11, 12) individually either with a measuring gas (8) or a zero gas (17 ) provided. The measuring cuvette (5) according to the invention enables in a simple manner a 2n-point calibration of the gas analyzer (1) and, during measuring operation, an adaptation of the effective measuring cuvette length (L) filled with the measuring gas (8) to the expected measuring gas concentration.
Description
Die Erfindung betrifft eine Messküvette für einen Gasanalysator, die aus mindestens zwei von einer Messstrahlung durchstrahlbaren, in Strahlungsrichtung hintereinander liegenden und jeweils einen Gaseinlass und einen Gasauslass aufweisenden Teilküvetten unterschiedlicher Länge besteht.The The invention relates to a measuring cuvette for a Gas analyzer, comprising at least two irradiated by a measuring radiation, one behind the other in the direction of radiation and one each Gas inlet and a gas outlet having Teilküvetten different length exists.
Die Erfindung betrifft ferner ein Verfahren zur Verwendung einer solchen Messküvette.The The invention further relates to a method of using such Cuvette.
Eine
derartige, aus der
Die Kalibrierung von nach dem Prinzip der optischen Absorption arbeitenden Gasanalysatoren erfolgt üblicherweise mittels eines Kalibrier- oder Endwertgases, dessen Konzentration durch Mischen mit einem Nullgas variiert wird. Mit den so erhaltenen Gasgemischen wird die Kennlinie des Gasanalysators ermittelt.The Calibration of optical absorption principle Gas analyzers are usually carried out by means of a calibration or final gas, its concentration by mixing with a Zero gas is varied. With the gas mixtures thus obtained is the Characteristic of the gas analyzer determined.
Der Erfindung liegt die Aufgabe zugrunde, die Messküvette eines Gasanalysators für die Messung sehr unterschiedlicher Messgaskonzentrationen sowie zum Zwecke der Kalibrierung zu verbessern.Of the Invention is based on the object, the cuvette of a Gas analyzer for the measurement of very different sample gas concentrations as well as for the purpose of calibration.
Gemäß der Erfindung wird die Aufgabe dadurch gelöst, dass die Messküvette der eingangs genannten Art aus mindestens drei, vorzugsweise vier Teilküvetten besteht und dass die Gaseinlässe der Teilküvetten an einem Gasverteiler angeschlossen sind, der jede Teilküvette entweder mit einem Messgas oder einem Nullgas versorgt. Je nachdem, welche der Teilküvetten mit dem Messgas und welche mit dem Nullgas beströmt werden, lassen sich unterschiedliche optisch effektive Messküvettenlängen einstellen, wobei die optisch effektive Messküvettenlänge der Summe der Längen der jeweils mit dem Messgas beströmten Teilküvetten entspricht.According to the Invention, the object is achieved in that the measuring cuvette of the type mentioned at least three, preferably four Partial cuvettes exists and that the gas inlets the partial cuvettes are connected to a gas distributor, each cuvette with either a sample gas or a Zero gas supplied. Depending on which of the partial cuvettes with the measuring gas and which are flown with the zero gas, can be different optically effective cuvette lengths adjust, whereby the optically effective measuring cuvette length the sum of the lengths of each flowed with the sample gas Partial cuvettes corresponds.
Der Gasverteiler zur Aufteilung des Messgases oder Nullgases auf die unterschiedlichen Teilküvetten besteht im einfachsten Fall aus einer Anordnung von Leitungen, die die entsprechenden Gaseinlässe der Teilküvetten mit einer Messgas- oder Nullgasquelle und ggf. die Gasein- und -auslässe unterschiedlicher Teilküvetten untereinander verbinden. Zur Vermeidung des Verschaltungsaufwandes für solche Leitungen besteht der Gasverteiler vorzugsweise aus einer steuerbaren Ventilanordnung.Of the Gas distributor for the distribution of the measuring gas or zero gas on the different partial cuvettes is the simplest case from an array of pipes containing the appropriate gas inlets the partial cuvettes with a sample gas or zero gas source and possibly the gas inlets and outlets of different partial cuvettes connect with each other. To avoid the Verschaltungsaufwandes for such lines, the gas distributor is preferably from a controllable valve assembly.
Vorzugsweise entspricht die Länge der n-ten Teilküvette dem 2(n-1)-fachen einer Basislänge, so dass sich 2n unterschiedliche optisch effektive Messküvettenlängen einstellen lassen. Wenn vorgesehen ist, dass für die Messung alle Teilküvetten mit dem Messgas beströmt werden, wird durch diesen Aufbau der Messküvette eine einfache 2n-Punkt-Kalibrierung des Gasanalysators ermöglicht, ohne dass das Kalibrier- oder Endwertgas mit einem Nullgas gemischt werden muss. Dazu werden nacheinander alle möglichen Kombinationen von Füllungen der Teilküvetten mit dem Kalibriergas (Endwertgas) oder dem Nullgas durchgespielt.The length of the nth partial cuvette preferably corresponds to 2 (n-1) times a basic length, so that 2 n different optically effective measuring cuvette lengths can be set. If it is envisaged that the measurement gas flows through all the sub-cuvettes for the measurement, this design of the cuvette enables a simple 2 n- point calibration of the gas analyzer, without the calibration or final gas having to be mixed with a zero gas. For this purpose, all possible combinations of fillings of the partial cuvettes with the calibration gas (final value gas) or the zero gas are successively played through.
Bei
einer anderen Ausführung entspricht die Länge
der n-ten Teilküvette dem n-fachen einer Basislänge,
so dass sich
Weiterhin bietet die erfindungsgemäße Messküvette die Möglichkeit, Gasanalysengeräte mit einem höheren Konzentrationsmessbereich zu realisieren, als dies bisher möglich war. Zu diesem Zweck wird einfach die effektive, mit Messgas gefüllte Messküvettenlänge an die zu erwartende Messgaskonzentration angepasst. Beispielsweise kann bei der Kohlenmonoxid-Messung an einem Verbrennungsmotor die effektive Messküvettenlänge in Abhängigkeit von einer Betriebsgröße des Motors, z. B. der Drehzahl, automatisch geändert werden.Farther offers the measuring cuvette according to the invention the ability to gas analyzers with a higher To realize concentration range, as previously possible was. For this purpose, simply the effective, filled with sample gas Sample cell length to the expected sample gas concentration customized. For example, in the carbon monoxide measurement an internal combustion engine, the effective measuring cell length depending on a farm size of the engine, z. As the speed to be changed automatically.
Im Folgenden wird die Erfindung anhand der Zeichnung näher erläutert. Hierzu zeigt die einzige Figur der Zeichnung in einer schematischen Skizze ein Ausführungsbeispiel der erfindungsgemäßen Messküvette in einem Infrarot-Gasanalysator.in the Below, the invention with reference to the drawing explained. The only figure of the drawing shows in a schematic sketch an embodiment of the Measuring cuvette according to the invention in one Infrared gas analyzer.
Die
Figur zeigt einen nicht-dispersiven Infrarot-Gasanalysator
Zu
Kalibrierungszwecken wird anstelle des Messgases
Bei
einer alternativen Ausführung entspricht die Länge
der n-ten Teilküvette dem n-fachen der Basislänge
L, so dass, wie die nächste Tabelle zeigt, mit vier Teilküvetten
eine 11-stufige Kalibrierung des Gasanalysators möglich
ist.
Wie
die unten stehende Tabelle zeigt, wird eine 11-stufige Kalibrierung
des Gasanalysators auch bei einer Aufteilung der Längen
der vier Teilküvetten im Verhältnis von 1:2:2:5
erreicht.
Die
Ventilanordnung
Die
Erfindung ist bei allen Arten von Gasanalysatoren anwendbar in denen
eine Messstrahlung durch eine Messküvette geleitet wird.
Die Reihenfolge der unterschiedlich langen Teilküvetten
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 19732470 C2 [0003] - DE 19732470 C2 [0003]
Claims (10)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008007407A DE102008007407A1 (en) | 2008-02-04 | 2008-02-04 | Measuring cuvette for a gas analyzer and its use |
PCT/EP2009/051246 WO2009098221A1 (en) | 2008-02-04 | 2009-02-04 | Measurement cell for a gas analyzer and use thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008007407A DE102008007407A1 (en) | 2008-02-04 | 2008-02-04 | Measuring cuvette for a gas analyzer and its use |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008007407A1 true DE102008007407A1 (en) | 2009-08-13 |
Family
ID=40547474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102008007407A Withdrawn DE102008007407A1 (en) | 2008-02-04 | 2008-02-04 | Measuring cuvette for a gas analyzer and its use |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102008007407A1 (en) |
WO (1) | WO2009098221A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011109000A1 (en) | 2011-07-29 | 2013-01-31 | Abb Technology Ag | An optical gas analyzer having means for enhancing the dynamic range of the measurement |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2758216A (en) * | 1950-12-11 | 1956-08-07 | Onera (Off Nat Aerospatiale) | Apparatus for performing quantitative analysis of gaseous mixtures |
DE3030002A1 (en) * | 1980-08-08 | 1982-03-11 | Hartmann & Braun Ag, 6000 Frankfurt | NON-DISPERSIVE INFRARED GAS ANALYZER |
DE3243301C2 (en) * | 1981-11-26 | 1986-01-16 | Horiba Ltd., Kyoto | Non-dispersive infrared gas analyzer |
DE3524189A1 (en) * | 1984-07-07 | 1986-02-06 | Horiba Ltd., Kyoto | Infrared gas analyser |
EP0340519A2 (en) * | 1988-05-04 | 1989-11-08 | Siemens Aktiengesellschaft | Pneumatic detector for NDIR analytical devices |
EP0423488A2 (en) * | 1989-09-28 | 1991-04-24 | Siemens Aktiengesellschaft | Measurement equipment and procedure for determination of the concentration of a component of a measuring gas before and after passing through a concentration-altering reactor |
DE19732470C2 (en) | 1997-07-28 | 1999-11-18 | Siemens Ag | Non-dispersive infrared gas analyzer |
US6940083B2 (en) * | 2000-09-25 | 2005-09-06 | Otsuka Pharmaceutical Co., Ltd. | Isotopic gas analyzer and method of judging absorption capacity of carbon dioxide absorbent |
EP1596184A2 (en) * | 1995-10-09 | 2005-11-16 | Otsuka Pharmaceutical Company, Limited | Method for spectrometrically measuring isotopic gas and apparatus thereof |
US20070182965A1 (en) * | 2005-09-28 | 2007-08-09 | Mks Instruments, Inc. | Linked extendable gas observation system for infrared absorption spectroscopy |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE967633C (en) * | 1950-12-11 | 1957-11-28 | Onera (Off Nat Aerospatiale) | Multiple analyzer, especially for gas mixtures |
US5693945A (en) * | 1994-07-30 | 1997-12-02 | Horiba Ltd. | Gas analyzer |
DE102005016320A1 (en) * | 2005-04-09 | 2006-10-12 | M+R Meß- und Regelungstechnik GmbH -An-Institut an der FH Anhalt | Infrared gas sensor for humidity measurement, has concentration sensor to measure concentration of sample gas in flushing gas, where neutral point of optical concentration measurement unit is corrected based on measurement concentration |
WO2006125470A1 (en) * | 2005-05-24 | 2006-11-30 | Agilent Technologies, Inc. | Multi-path flow cell correction |
-
2008
- 2008-02-04 DE DE102008007407A patent/DE102008007407A1/en not_active Withdrawn
-
2009
- 2009-02-04 WO PCT/EP2009/051246 patent/WO2009098221A1/en active Application Filing
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2758216A (en) * | 1950-12-11 | 1956-08-07 | Onera (Off Nat Aerospatiale) | Apparatus for performing quantitative analysis of gaseous mixtures |
DE3030002A1 (en) * | 1980-08-08 | 1982-03-11 | Hartmann & Braun Ag, 6000 Frankfurt | NON-DISPERSIVE INFRARED GAS ANALYZER |
DE3243301C2 (en) * | 1981-11-26 | 1986-01-16 | Horiba Ltd., Kyoto | Non-dispersive infrared gas analyzer |
DE3524189A1 (en) * | 1984-07-07 | 1986-02-06 | Horiba Ltd., Kyoto | Infrared gas analyser |
EP0340519A2 (en) * | 1988-05-04 | 1989-11-08 | Siemens Aktiengesellschaft | Pneumatic detector for NDIR analytical devices |
EP0423488A2 (en) * | 1989-09-28 | 1991-04-24 | Siemens Aktiengesellschaft | Measurement equipment and procedure for determination of the concentration of a component of a measuring gas before and after passing through a concentration-altering reactor |
EP1596184A2 (en) * | 1995-10-09 | 2005-11-16 | Otsuka Pharmaceutical Company, Limited | Method for spectrometrically measuring isotopic gas and apparatus thereof |
DE19732470C2 (en) | 1997-07-28 | 1999-11-18 | Siemens Ag | Non-dispersive infrared gas analyzer |
US6940083B2 (en) * | 2000-09-25 | 2005-09-06 | Otsuka Pharmaceutical Co., Ltd. | Isotopic gas analyzer and method of judging absorption capacity of carbon dioxide absorbent |
US20070182965A1 (en) * | 2005-09-28 | 2007-08-09 | Mks Instruments, Inc. | Linked extendable gas observation system for infrared absorption spectroscopy |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011109000A1 (en) | 2011-07-29 | 2013-01-31 | Abb Technology Ag | An optical gas analyzer having means for enhancing the dynamic range of the measurement |
WO2013017212A1 (en) | 2011-07-29 | 2013-02-07 | Abb Technology Ag | Optical gas analyser device having means for improving the dynamic range of the measurement |
Also Published As
Publication number | Publication date |
---|---|
WO2009098221A1 (en) | 2009-08-13 |
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OP8 | Request for examination as to paragraph 44 patent law | ||
8130 | Withdrawal | ||
8165 | Unexamined publication of following application revoked |