DE102005025675A1 - Radiator for non-dispersing infrared (IR) gas analyser contains light source in radiator chamber, with radiation guided through outlet window(s) - Google Patents
Radiator for non-dispersing infrared (IR) gas analyser contains light source in radiator chamber, with radiation guided through outlet window(s) Download PDFInfo
- Publication number
- DE102005025675A1 DE102005025675A1 DE200510025675 DE102005025675A DE102005025675A1 DE 102005025675 A1 DE102005025675 A1 DE 102005025675A1 DE 200510025675 DE200510025675 DE 200510025675 DE 102005025675 A DE102005025675 A DE 102005025675A DE 102005025675 A1 DE102005025675 A1 DE 102005025675A1
- Authority
- DE
- Germany
- Prior art keywords
- radiation
- radiator
- chamber
- light source
- arrangement
- 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.)
- Ceased
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 46
- 230000001681 protective effect Effects 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 14
- 239000007789 gas Substances 0.000 description 11
- 229910002092 carbon dioxide Inorganic materials 0.000 description 7
- 239000001569 carbon dioxide Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
- 230000006399 behavior Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange 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
- G01N21/17—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
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/063—Illuminating optical parts
- G01N2201/0636—Reflectors
-
- 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
- G01N2201/06—Illumination; Optics
- G01N2201/069—Supply of sources
- G01N2201/0696—Pulsed
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (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)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Optical Measuring Cells (AREA)
Abstract
Description
Die Erfindung betrifft eine Strahleranordnung für einen nichtdispersiven Infrarot-Gasanalysator mit einer Strahlerkammer und einer darin angeordneten Strahlungsquelle, deren Strahlung durch mindestens ein Austrittsfenster in mindestens einen Strahlengang des Gasanalysators geleitet wird, und mit Mitteln zum periodischen Ein- und Ausschalten der Strahlung in dem mindestens einen Strahlengang.The The invention relates to a radiator arrangement for a non-dispersive infrared gas analyzer with a radiation chamber and a radiation source arranged therein, their radiation through at least one exit window in at least a beam path of the gas analyzer is passed, and with means for periodically switching on and off the radiation in the at least a beam path.
Nichtdispersive
Infrarot-(NDIR)-Gasanalysatoren als Ein- oder Zweistrahlgeräte mit einem
Strahlengang bzw. zwei Strahlengängen
sind beispielsweise aus der
Das zur Modulation der Infrarot-Strahlung dienende Blendenrad benötigt zwischen der Strahlungsquelle und der Messküvette bzw. der Vergleichsküvette einen Luftspalt, innerhalb dessen es rotieren kann. Bei der Messung von Kohlendioxidkonzentrationen, insbesondere von sehr geringen Kohlendioxidkonzentrationen, beispielsweise in der Größenordnung von 50 ppm, kann sich der Luftspalt als sehr störend erweisen, da die Luft selbst ca. 400 ppm Kohlendioxid enthält und dieser Kohlendioxidanteil außerdem aufgrund von Umgebungseinflüssen, beispielsweise Atemluft oder in der Umgebung von Verbrennungsprozessen, stark schwanken kann.The for the modulation of the infrared radiation serving aperture wheel between the radiation source and the cuvette or the comparison cuvette a Air gap within which it can rotate. In the measurement of Carbon dioxide concentrations, in particular of very low carbon dioxide concentrations, for example, in the order of magnitude of 50 ppm, the air gap can be very disturbing as the air itself contains about 400 ppm of carbon dioxide and this carbon dioxide content Furthermore due to environmental influences, For example, breathing air or in the vicinity of combustion processes, can vary greatly.
Um
eine vom Kohlendioxidgehalt der Außenluft unabhängige genaue
Messung der Kohlendioxidkonzentration in dem Messgas zu ermöglichen,
ist es aus der
Der Erfindung liegt die Aufgabe zugrunde, eine alternative Lösung anzugeben, die mit geringerem konstruktiven Aufwand verbunden ist.Of the Invention has for its object to provide an alternative solution which is associated with less design effort.
Gemäß der Erfindung wird die Aufgabe dadurch gelöst, dass bei der Strahleranordnung der eingangs angegebenen Art die Mittel zum periodischen Ein- und Ausschalten der Strahlung eine in der Strahlerkammer angeordnete digitale Mikrospiegelanordnung nach dem DMD-Typ aufweisen, die durch elektrische Ansteuerung die Strahlung der Strahlungsquelle abwechselnd in den mindestens einen Strahlengang und eine davon abweichende Richtung leitet.According to the invention the task is solved by that in the radiator arrangement of the type specified in the Means for periodically switching on and off the radiation arranged in the radiator chamber digital micromirror arrangement have the DMD type, which by electrical control the Radiation of the radiation source alternately in the at least one Beam path and a different direction directs.
Digitale Mikrospiegelanordnungen sind in Form von Chips mit Mikrospiegeln, so genannte DMD-Chips (Digital Micromirror Device), bekannt. Ein solcher Chip weist auf seiner Oberseite ein Mikrospiegelfeld mit hunderttausenden und mehr Mikrospiegeln auf, die jeweils als Wippe auf einer CMOS-Speicherzelle gelagert sind. In Abhängigkeit von der Ladung der Speicherzelle kippt der Mikrospiegel aus einer Neutrallage nach rechts oder links, so dass sich das Reflexionsverhalten des Mikrospiegels entsprechend verändert. Der Trend geht zur Entwicklung immer kleinerer Spiegel, da sich diese schneller bewegen lassen. Durch äußerst schnelle Ansteuerung sämtlicher Mikrospiegel des Mikrospiegelfeldes kann das optische Verhalten und die Umlenkung von auf das Mikrospiegelfeld treffender Strahlung in weiten Grenzen gesteuert werden.digital Micromirror arrays are in the form of chips with micromirrors, so-called DMD chips (Digital Micromirror Device), known. One such chip has on its top with a micromirror field Hundreds of thousands and more micromirrors, each as a rocker are stored on a CMOS memory cell. In dependence of the charge of the memory cell tilts the micromirror from a neutral position to the right or left, so that the reflection behavior of the Micromirror changed accordingly. The trend is towards the development of ever smaller mirrors, since let them move faster. Due to extremely fast control all Micromirror of the micromirror field can be the optical behavior and the redirection of radiation impinging on the micromirror field be controlled within wide limits.
Der wesentliche Vorteil der erfindungsgemäßen Strahleranordnung besteht darin, dass die Mittel zum periodischen Ein- und Ausschalten der Strahlung aus einer solchen, an sich bekannten digitalen Mikrospiegelanordnung bestehen und dass diese Mikrospiegelanordnung innerhalb der Strahlerkammer angeordnet ist. Dadurch bedarf es keines Blendenrades oder sonstiger außerhalb der Strahlerkammer und der Mess- und/oder Vergleichsküvette des Gasanalysators angeordneter Mittel zur Modulation der Strahlung, so dass die erfindungsgemäße Strahleranordnung und die Mess- bzw. Vergleichsküvette unmittelbar, d. h. ohne Zwischenraum, aneinander montiert werden können.Of the substantial advantage of the radiator arrangement according to the invention exists in that the means for periodically switching on and off the Radiation from such, known per se digital micromirror arrangement exist and that this micromirror arrangement is disposed within the radiator chamber is. This requires no aperture wheel or other outside the radiator chamber and the measuring and / or reference cuvette of Gas analyzer arranged means for modulation of radiation, so that the radiator arrangement according to the invention and the measurement or comparison cuvette directly, d. H. without space, to be mounted together can.
Die Strahlerkammer ist vorzugsweise mit einem Schutzgas gefüllt, wobei die elektrischen Leitungen zur Ansteuerung der digitalen Mikrospiegelanordnung genauso wie die Versorgungsleitungen für die Strahlungsquelle mittels gasdichter Durchführungen, z. B. Glasdurchführungen, in die Strahlerkammer geführt werden.The Radiator chamber is preferably filled with a protective gas, wherein the electrical lines for driving the digital micromirror arrangement as well as the supply lines for the radiation source by means of gas-tight bushings, z. B. glass feedthroughs, led into the radiator chamber become.
Im Weiteren wird die Erfindung beispielhaft anhand der Zeichnung beschrieben, wobeiin the Furthermore, the invention will be described by way of example with reference to the drawing, in which
Die
in
Die
in
Claims (3)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510025675 DE102005025675A1 (en) | 2005-06-03 | 2005-06-03 | Radiator for non-dispersing infrared (IR) gas analyser contains light source in radiator chamber, with radiation guided through outlet window(s) |
PCT/EP2006/062886 WO2006128914A1 (en) | 2005-06-03 | 2006-06-02 | Emitter arrangement for a non-dispersive infrared gas analyser |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510025675 DE102005025675A1 (en) | 2005-06-03 | 2005-06-03 | Radiator for non-dispersing infrared (IR) gas analyser contains light source in radiator chamber, with radiation guided through outlet window(s) |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102005025675A1 true DE102005025675A1 (en) | 2006-11-16 |
Family
ID=36809098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200510025675 Ceased DE102005025675A1 (en) | 2005-06-03 | 2005-06-03 | Radiator for non-dispersing infrared (IR) gas analyser contains light source in radiator chamber, with radiation guided through outlet window(s) |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102005025675A1 (en) |
WO (1) | WO2006128914A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008116654A1 (en) * | 2007-03-27 | 2008-10-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Photoacoustic detector with two beam paths for excitation light |
US7777878B2 (en) * | 2006-12-19 | 2010-08-17 | J.A. Woollam Co., Inc. | Application of digital light processor in scanning spectrometer and imaging ellipsometer and the like systems |
WO2010139965A3 (en) * | 2009-06-04 | 2011-03-10 | Cambridge Consultants Limited | Device and method for determining the composition of a mixture of fluids |
DE102016124068A1 (en) * | 2016-12-12 | 2018-06-14 | HELLA GmbH & Co. KGaA | Measuring device and method for fine dust measurement for a motor vehicle |
US11162893B2 (en) | 2009-06-04 | 2021-11-02 | Pietro Fiorentini S.P.A. | Device and method for determining the composition of a mixture of fluids |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5801826A (en) * | 1997-02-18 | 1998-09-01 | Williams Family Trust B | Spectrometric device and method for recognizing atomic and molecular signatures |
DE19710143A1 (en) * | 1997-03-13 | 1998-09-17 | Inst Physikalische Hochtech Ev | Hadamard spectrometer |
EP1217355A2 (en) * | 1997-09-17 | 2002-06-26 | Oridion Medical, Ltd. | A gas sample chamber system |
WO2003021211A1 (en) * | 2001-08-31 | 2003-03-13 | Respironics, Inc. | Microspectrometer gas analyzer |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2753242C2 (en) * | 1977-11-29 | 1979-11-15 | H. Maihak Ag, 2000 Hamburg | Non-dispersive infrared gas analyzer |
JP3936056B2 (en) * | 1998-02-12 | 2007-06-27 | ペンタックス株式会社 | Projection device |
US6464633B1 (en) * | 1999-08-23 | 2002-10-15 | Olympus Optical Co., Ltd. | Light source device for endoscope using DMD |
-
2005
- 2005-06-03 DE DE200510025675 patent/DE102005025675A1/en not_active Ceased
-
2006
- 2006-06-02 WO PCT/EP2006/062886 patent/WO2006128914A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5801826A (en) * | 1997-02-18 | 1998-09-01 | Williams Family Trust B | Spectrometric device and method for recognizing atomic and molecular signatures |
DE19710143A1 (en) * | 1997-03-13 | 1998-09-17 | Inst Physikalische Hochtech Ev | Hadamard spectrometer |
EP1217355A2 (en) * | 1997-09-17 | 2002-06-26 | Oridion Medical, Ltd. | A gas sample chamber system |
WO2003021211A1 (en) * | 2001-08-31 | 2003-03-13 | Respironics, Inc. | Microspectrometer gas analyzer |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7777878B2 (en) * | 2006-12-19 | 2010-08-17 | J.A. Woollam Co., Inc. | Application of digital light processor in scanning spectrometer and imaging ellipsometer and the like systems |
WO2008116654A1 (en) * | 2007-03-27 | 2008-10-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Photoacoustic detector with two beam paths for excitation light |
US8359903B2 (en) | 2007-03-27 | 2013-01-29 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Photoacoustic detector with two beam paths for excitation light |
WO2010139965A3 (en) * | 2009-06-04 | 2011-03-10 | Cambridge Consultants Limited | Device and method for determining the composition of a mixture of fluids |
AU2010255551B2 (en) * | 2009-06-04 | 2013-04-18 | Pietro Fiorentini Spa | Device and method for determining the composition of a mixture of fluids |
EP2919006A3 (en) * | 2009-06-04 | 2015-10-07 | Pietro Fiorentini S.P.A. | Device and method for determining the composition of a mixture of fluids |
US9933360B2 (en) | 2009-06-04 | 2018-04-03 | Pietro Fiorentini S.P.A. | Device and method for determining the composition of a mixture of fluids |
US11162893B2 (en) | 2009-06-04 | 2021-11-02 | Pietro Fiorentini S.P.A. | Device and method for determining the composition of a mixture of fluids |
DE102016124068A1 (en) * | 2016-12-12 | 2018-06-14 | HELLA GmbH & Co. KGaA | Measuring device and method for fine dust measurement for a motor vehicle |
Also Published As
Publication number | Publication date |
---|---|
WO2006128914A1 (en) | 2006-12-07 |
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Legal Events
Date | Code | Title | Description |
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OAV | Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1 | ||
OP8 | Request for examination as to paragraph 44 patent law | ||
8131 | Rejection |