DE102009039183A1 - System arrangement for calibration of oxygen measuring probe, has oxygen measuring probe, heated area with defined gas atmosphere, plant control and gas cell for reference air - Google Patents
System arrangement for calibration of oxygen measuring probe, has oxygen measuring probe, heated area with defined gas atmosphere, plant control and gas cell for reference air Download PDFInfo
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- DE102009039183A1 DE102009039183A1 DE102009039183A DE102009039183A DE102009039183A1 DE 102009039183 A1 DE102009039183 A1 DE 102009039183A1 DE 102009039183 A DE102009039183 A DE 102009039183A DE 102009039183 A DE102009039183 A DE 102009039183A DE 102009039183 A1 DE102009039183 A1 DE 102009039183A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
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- Immunology (AREA)
- Pathology (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
Description
Stand der TechnikState of the art
Moderne Sauerstoffmesssonden, im Folgenden als Sonden (bzw. als Sonde) bezeichnet, beruhen auf dem Prinzip der Nernt-Spannung. Diese entsteht durch ein, von einem Elektrolyten getrenntem, Niveau von Gemischen unterschiedlicher Konzentrationen. Diese Spannung ist 0 mV bei identischen Konzentrationen und steigt, je größer das Verhältnis der Konzentrationen ist.Modern oxygen measuring probes, hereinafter referred to as probes (or as a probe), based on the principle of Nernt voltage. This is caused by a level of mixtures of different concentrations, separated from an electrolyte. This voltage is 0 mV at identical concentrations and increases as the ratio of concentrations increases.
Im Fall der Messung von unterschiedlichen Sauerstoffkonzentrationen der Abgase in der Automobiltechnik hat sich eine Ausführung mit einem Festkörperelektrolyten aus Yttrium stabilisiertem Zirkonoxid (YSZ) in zahllosen so genannten Lambdasonden bewährt. In Aufkohlungsanlagen sind Sonden mit YSZ-Elektrolyten seit Jahrzehnten im Einsatz und messen die Sauerstoffkonzentration in der Anlagenatmosphäre im Verhältnis zur Umgebungsluft. Hier sind die Spannungen von 0 mV (= 21% Sauerstoff) bis zu theoretischen ~1200 mV (0% Sauerstoff) möglich. Diese Spannung wird von zwei Elektroden, welche jeweils an der sauerstoffreichen Seite des Elektrolyten, die im weiteren genannte Luftseite (
Bei einer Elektrolyttemperatur von 700°C < TS < 1200°C wird der YSZ-Elektrolyt sauerstofftransparent. Das bedeutet, dass sich Sauerstoffionen über die Fehlstellen im Keramikgitter von der Luftseite (
In der Praxis beeinflussen verschiedene Faktoren die Funktion der Sonde (
Zudem kommt es, bedingt durch den Prozess der Aufkohlung, zu fokalen Rußablagerungen. Diese haben eine sehr hohe Sauerstoffaffinität, so dass das Signal der Sonde verfälscht wird. Um diese Ablagerungen zu entfernen, wird in zeitlichen Intervallen die Gasseite der Sonde mit Umgebungsluft gespült. Diese enthält ~21% Sauerstoff, der den Ruß verbrennen lässt. Als Nachteil sinkt die Spannung der Sonde augenblicklich auf fast 0 mV, da es keinen Konzentrationsunterschied gibt. Je nach Konstruktion der Sonde verweilt die Spülluft für längere Zeit in der Gasseite (
Aufgabenstellung der Erfindung ist es daher eine Methode zu finden, in der die Kalibrierung der Sonde direkt erfolgen kann.Task of the invention is therefore to find a method in which the calibration of the probe can be done directly.
Die Lösung der Aufgabenstellung wird durch eine Systemanordnung erreicht, in dem eine weitere Gasquelle (
Wird nun die Gasseite (
Über eine geeignete Anlagensteuerung (
Ein weiter Vorteil dieser Lösung ist die Tatsache, dass die, durch die Reinigungsspülung eingebrachte 21%-ige Umgebungsluft durch den Stickstoff aus der Gasseite der Sonde verdrängt wird und so die Sonde viel schneller wieder den aktuellen Wert anzeigen kann.A further advantage of this solution is the fact that the 21% ambient air introduced by the cleaning rinse is displaced by the nitrogen from the gas side of the probe and so the probe can display the current value much faster.
Denkbar ist auch eine Ausführung, in der das Prüfgas in das Referenzluftsystem eingespeist wird.Also conceivable is an embodiment in which the test gas is fed into the reference air system.
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES 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 of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 3201796 C2 [0002] DE 3201796 C2 [0002]
- DE 3323241 C2 [0004] DE 3323241 C2 [0004]
Claims (23)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009039183A DE102009039183A1 (en) | 2009-08-28 | 2009-08-28 | System arrangement for calibration of oxygen measuring probe, has oxygen measuring probe, heated area with defined gas atmosphere, plant control and gas cell for reference air |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009039183A DE102009039183A1 (en) | 2009-08-28 | 2009-08-28 | System arrangement for calibration of oxygen measuring probe, has oxygen measuring probe, heated area with defined gas atmosphere, plant control and gas cell for reference air |
Publications (1)
Publication Number | Publication Date |
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DE102009039183A1 true DE102009039183A1 (en) | 2011-03-17 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE102009039183A Withdrawn DE102009039183A1 (en) | 2009-08-28 | 2009-08-28 | System arrangement for calibration of oxygen measuring probe, has oxygen measuring probe, heated area with defined gas atmosphere, plant control and gas cell for reference air |
Country Status (1)
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DE (1) | DE102009039183A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160131614A1 (en) * | 2013-08-22 | 2016-05-12 | Horiba Advanced Techno, Co., Ltd. | Dissolved Oxygen Measurement System and Method of Calibrating Dissolved Oxygen Meter |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3201796C2 (en) | 1982-01-21 | 1990-08-30 | Thermo-Control Koertvelyessy Gmbh, 4190 Kleve, De | |
DE3323241C2 (en) | 1983-06-28 | 1992-02-06 | Thermo-Control Koertvelyessy Gmbh, 4190 Kleve, De | |
EP0548842A1 (en) * | 1991-12-20 | 1993-06-30 | Saarbergwerke Aktiengesellschaft | Device for determining of moisture content of gases |
DE4239292A1 (en) * | 1992-11-23 | 1994-05-26 | Zirox Sensoren & Elektronik Gm | Testable oxygen probe for use at normal to very high temps. - incorporates channels for exposure of electrode either to unknown gas compsn. or to reference gas for test purposes |
DE4417929A1 (en) * | 1994-05-19 | 1995-12-07 | Mannesmann Ag | Measuring unit for analysing measurement gas components or aerosols |
GB2409280A (en) * | 2003-12-18 | 2005-06-22 | Gen Electric | A gaseous combustible senor with an arrangement for delivering a calibration gas |
DE102008007318A1 (en) * | 2008-02-02 | 2009-08-20 | Enotec Gmbh, Prozess- Und Umweltmesstechnik | Flue gas moisture content determining method for e.g. refuse incineration plant, involves determining moisture content of gas and feeding dried gas adjacent cell inside flue gas channel, where cells are arranged in channel |
-
2009
- 2009-08-28 DE DE102009039183A patent/DE102009039183A1/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3201796C2 (en) | 1982-01-21 | 1990-08-30 | Thermo-Control Koertvelyessy Gmbh, 4190 Kleve, De | |
DE3323241C2 (en) | 1983-06-28 | 1992-02-06 | Thermo-Control Koertvelyessy Gmbh, 4190 Kleve, De | |
EP0548842A1 (en) * | 1991-12-20 | 1993-06-30 | Saarbergwerke Aktiengesellschaft | Device for determining of moisture content of gases |
DE4239292A1 (en) * | 1992-11-23 | 1994-05-26 | Zirox Sensoren & Elektronik Gm | Testable oxygen probe for use at normal to very high temps. - incorporates channels for exposure of electrode either to unknown gas compsn. or to reference gas for test purposes |
DE4417929A1 (en) * | 1994-05-19 | 1995-12-07 | Mannesmann Ag | Measuring unit for analysing measurement gas components or aerosols |
GB2409280A (en) * | 2003-12-18 | 2005-06-22 | Gen Electric | A gaseous combustible senor with an arrangement for delivering a calibration gas |
DE102008007318A1 (en) * | 2008-02-02 | 2009-08-20 | Enotec Gmbh, Prozess- Und Umweltmesstechnik | Flue gas moisture content determining method for e.g. refuse incineration plant, involves determining moisture content of gas and feeding dried gas adjacent cell inside flue gas channel, where cells are arranged in channel |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160131614A1 (en) * | 2013-08-22 | 2016-05-12 | Horiba Advanced Techno, Co., Ltd. | Dissolved Oxygen Measurement System and Method of Calibrating Dissolved Oxygen Meter |
US9897570B2 (en) * | 2013-08-22 | 2018-02-20 | Horiba Advanced Techno, Co., Ltd. | Dissolved oxygen measurement system and method of calibrating dissolved oxygen meter |
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OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
R012 | Request for examination validly filed | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |