WO1998012552A1 - Arrangement for the paramagnetic measurement of the oxygen content of a gas to be measured - Google Patents

Arrangement for the paramagnetic measurement of the oxygen content of a gas to be measured Download PDF

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Publication number
WO1998012552A1
WO1998012552A1 PCT/DE1997/002078 DE9702078W WO9812552A1 WO 1998012552 A1 WO1998012552 A1 WO 1998012552A1 DE 9702078 W DE9702078 W DE 9702078W WO 9812552 A1 WO9812552 A1 WO 9812552A1
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WO
WIPO (PCT)
Prior art keywords
measuring
gas
bore
line
shell part
Prior art date
Application number
PCT/DE1997/002078
Other languages
German (de)
French (fr)
Inventor
Günter Marcaux
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1998012552A1 publication Critical patent/WO1998012552A1/en

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Classifications

    • 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
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/74—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables of fluids

Definitions

  • Measuring device for paramagnetic measurement of the oxygen content in a sample gas
  • the invention relates to a measuring device according to the preamble of claim 1.
  • Such a measuring device is known from DE-U-87 03 944.
  • EP-A-0 343 519 shows a corresponding measuring device in which a flat measuring chamber unit with a rectangular cross section is held between two shell parts.
  • the invention has for its object to significantly simplify the structure of the measuring device in the region of the measuring chamber.
  • the object is achieved by the measuring device specified in claim 1.
  • a cuboid shell part 1 recesses 2 are milled on one side, which when covered with an ab- Cover part 3 form a measuring chamber 4 and two line sections 5 and 6 which open into the measuring chamber 4 on opposite sides.
  • Two bores 7 and 8 extending from the outside through the shell part 1 into the measuring chamber 4 form an inlet and an outlet for a measuring gas flowing through the measuring chamber 4.
  • the two line sections 5 and 6 open approximately in the middle between the two bores 7 and 8 in the measuring chamber 4 and from there extend on both sides of the measuring chamber 4 beyond its outer limit 9, where they end.
  • two bores 12 and 13 lead outwards through the shell part 1 to the side of the shell part 1 facing away from the cover part 3 and form connections there for a transverse line 15 contained in a measuring head 14 with a flow or pressure sensor 16 arranged therein, e.g. B. a membrane capacitor.
  • the two ends 10 and 11 of the line sections 5 and 6 are also connected to one another by a bore 17 in the shell part 1.
  • the bore 17 is closed to the outside with a closure part 18.
  • Halfway between the two ends 10 and 11, a further bore 19 runs from the outside through the shell part 1 and forms an auxiliary gas line for supplying an auxiliary gas.
  • the bore 17 contains on both sides of the mouth parts of the further bore 19 a cylindrical throttle piece 20 and 21 respectively.
  • the entire measuring device also includes a magnetic circuit, not shown here, which passes through the opening parts of one of the two line sections 5 and 6 into the measuring chamber 4 with an alternating magnetic field 22.
  • the functioning of the measuring device is known from the aforementioned DE-U-87 03 944.
  • the measuring device is characterized by a simple structure, the implementation of the gas connections on the outer sides of the switching part 1 being a simple connection of further gas-carrying components, such as, for. B. here the measuring head 14.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

The invention concerns an arrangement for the paramagnetic measurement of the oxygen content of a gas to be measured. A measuring cell through which the gas to be measured flows has a simple structure in that a shell section (1) has depressions (2) on one side and is covered on this side by a cover part (3).

Description

Beschreibungdescription
Meßeinrichtung zur paramagnetischen Messung des Sauerstoff- gehalts in einem MeßgasMeasuring device for paramagnetic measurement of the oxygen content in a sample gas
Die Erfindung betrifft eine Meßeinrichtung nach dem Oberbegriff des Anspruchs 1.The invention relates to a measuring device according to the preamble of claim 1.
Eine derartige Meßeinrichtung ist aus der DE-U-87 03 944 bekannt .Such a measuring device is known from DE-U-87 03 944.
Die EP-A-0 343 519 zeigt eine entsprechende Meßeinrichtung, bei der eine flache Meßkammer-Einheit mit rechteckigem Querschnitt zwischen zwei Schalenteilen gehalten ist .EP-A-0 343 519 shows a corresponding measuring device in which a flat measuring chamber unit with a rectangular cross section is held between two shell parts.
Der Erfindung liegt die Aufgabe zugrunde, den Aufbau der Meßeinrichtung im Bereich der Meßkammer erheblich zu vereinfachen .The invention has for its object to significantly simplify the structure of the measuring device in the region of the measuring chamber.
Gemäß der Erfindung wird die Aufgabe durch die in Anspruch 1 angegebene Meßeinrichtung gelös .According to the invention, the object is achieved by the measuring device specified in claim 1.
Vorteilhafte Weiterbildungen der erfindungsgemäßen Meßeinrichtung sind den Unteransprüchen zu entnehmen.Advantageous developments of the measuring device according to the invention can be found in the subclaims.
Im weiteren wird die Erfindung anhand eines in der Figur der Zeichnung dargestellten Ausführungsbeispiels erläutert.Furthermore, the invention is explained with reference to an embodiment shown in the figure of the drawing.
In einem quaderförmigen Schalenteil 1 sind auf einer Seite Vertiefungen 2 eingefräst, die bei Abdeckung mit einem Ab- deckteil 3 eine Meßkammer 4 und zwei auf gegenüberliegenden Seiten in die Meßkammer 4 einmündende Leitungsabschnitte 5 und 6 bilden. Zwei von außen durch das Schalenteil l in die Meßkammer 4 reichende Bohrungen 7 und 8 bilden einen Einlaß und einen Auslaß für ein die Meßkammer 4 durchströmendes Meßgas . Die beiden Leitungsabschnitte 5 und 6 münden in etwa in der Mitte zwischen den beiden Bohrungen 7 und 8 in die Meßkammer 4 und verlaufen von dort aus beiderseits der Meßkammer 4 über deren äußere Grenze 9 hinaus, wo sie enden. Dort füh- ren von den Enden 10 und 11 der Leitungsabschnitte 5 und 6 zwei Bohrungen 12 und 13 durch das Schalenteil 1 nach außen auf die von dem Abdeckteil 3 abgewandte Seite des Schalenteils 1 und bilden dort Anschlüsse für eine in einem Meßkopf 14 enthaltene Querleitung 15 mit darin angeordnetem Strö- mungs- oder Drucksensor 16, z. B. ein Membrankondensator. Die beiden Enden 10 und 11 der Leitungsabschnitte 5 und 6 sind ferner durch eine Bohrung 17 im Schalenteil 1 miteinander verbunden. Die Bohrung 17 ist nach außen mit einem Verschlußteil 18 verschlossen. Auf halbem Wege zwischen den beiden Enden 10 und 11 mündet in die Bohrung 17 eine weitere, von außen durch das Schalenteil 1 verlaufende Bohrung 19, die eine Hilfsgasleitung zur Zuführung eines Hilfsgases bildet. Die Bohrung 17 enthält beiderseits der Einmündungssteile der weiteren Bohrung 19 jeweils ein zylindrisches Drosselstück 20 bzw. 21.In a cuboid shell part 1, recesses 2 are milled on one side, which when covered with an ab- Cover part 3 form a measuring chamber 4 and two line sections 5 and 6 which open into the measuring chamber 4 on opposite sides. Two bores 7 and 8 extending from the outside through the shell part 1 into the measuring chamber 4 form an inlet and an outlet for a measuring gas flowing through the measuring chamber 4. The two line sections 5 and 6 open approximately in the middle between the two bores 7 and 8 in the measuring chamber 4 and from there extend on both sides of the measuring chamber 4 beyond its outer limit 9, where they end. There, from the ends 10 and 11 of the line sections 5 and 6, two bores 12 and 13 lead outwards through the shell part 1 to the side of the shell part 1 facing away from the cover part 3 and form connections there for a transverse line 15 contained in a measuring head 14 with a flow or pressure sensor 16 arranged therein, e.g. B. a membrane capacitor. The two ends 10 and 11 of the line sections 5 and 6 are also connected to one another by a bore 17 in the shell part 1. The bore 17 is closed to the outside with a closure part 18. Halfway between the two ends 10 and 11, a further bore 19 runs from the outside through the shell part 1 and forms an auxiliary gas line for supplying an auxiliary gas. The bore 17 contains on both sides of the mouth parts of the further bore 19 a cylindrical throttle piece 20 and 21 respectively.
Zu der gesamten Meßeinrichtung gehört noch ein hier nicht gezeigter Magnetkreis, der die Einmündungssteile einer der beiden Leitungsabschnitte 5 und 6 in die Meßkammer 4 mit einem Wechselmagnetfeld 22 durchsetzt. Die Funktionsweise der Meßeinrichtung ist aus der eingangs erwähnten DE-U-87 03 944 bekannt.The entire measuring device also includes a magnetic circuit, not shown here, which passes through the opening parts of one of the two line sections 5 and 6 into the measuring chamber 4 with an alternating magnetic field 22. The functioning of the measuring device is known from the aforementioned DE-U-87 03 944.
Die erfindungsgemäße Meßeinrichtung zeichnet sich durch einen einfachen Aufbau aus, wobei die Realisierung der Gasanschlüsse an den Außenseiten des Schaltenteils 1 einen einfachen Anschluß weiterer gasführender Komponenten, wie z. B. hier der Meßkopf 14, ermöglichen. The measuring device according to the invention is characterized by a simple structure, the implementation of the gas connections on the outer sides of the switching part 1 being a simple connection of further gas-carrying components, such as, for. B. here the measuring head 14.

Claims

Patentansprüche claims
1. Meßeinrichtung zur paramagnetischen Messung des Säuerstoffgehalts in einem Meßgas mit einer von dem Meßgas durch- strömten Meßkammer (4) , mit einer Hilfsgasleitung, von der zwei Leitungsabschnitte (5, 6) abzweigen und an zwei gegenüberliegenden Seiten in die Meßkammer (4) münden, mit einer zwischen den beiden Leitungsabschnitten (5, 6) liegenden Querleitung (15) , in der ein Strömungs- oder Drucksensor (16) angeordnet ist, und mit einem Magnetkreis, dessen Wechsel- agnetfeld (22) die Einmündungsstelle eines der beiden Leitungsabschnitte (5, 6) in die Meßkammer (4) durchsetzt, dadurch gekennzeichnet, daß zur Bildung der Meßkammer (4) und der Leitungsabschnitte (5, 6) ein Schalenteil (1) auf einer Seite Vertiefungen (2) enthält und auf dieser Seite durch ein Abdeckteil (3) abgedeckt ist.1. Measuring device for paramagnetic measurement of the oxygen content in a measuring gas with a measuring chamber (4) through which the measuring gas flows, with an auxiliary gas line from which two line sections (5, 6) branch off and open into the measuring chamber (4) on two opposite sides , with a cross line (15) between the two line sections (5, 6), in which a flow or pressure sensor (16) is arranged, and with a magnetic circuit, the alternating magnetic field (22) of which meets the junction of one of the two line sections ( 5, 6) penetrates into the measuring chamber (4), characterized in that to form the measuring chamber (4) and the line sections (5, 6) a shell part (1) on one side contains depressions (2) and on this side by a Cover part (3) is covered.
2. Meßeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Schalenteil (l) und/oder das Abdeckteil (3) zur Bildung eines Einlasses und Auslasses für das Meßgas und zur Bildung von Anschlüssen für die Querleitung (15) von außen in die Vertiefungen (2) reichende Bohrungen (7, 8, 12, 13) enthält.2. Measuring device according to claim 1, characterized in that the shell part (l) and / or the cover part (3) to form an inlet and outlet for the measuring gas and to form connections for the cross line (15) from the outside into the recesses ( 2) contains extending holes (7, 8, 12, 13).
3. Meßeinrichtung nach Anspruch 2, dadurch gekennzeichnet , daß die Bohrungen (7, 8, 12, 13) auf der von dem Abdeckteil (3) abgewandten Seite des Schalenteils (1) nach außen münden. 3. Measuring device according to claim 2, characterized in that the bores (7, 8, 12, 13) on the side of the shell part (1) facing away from the cover part (3) open outwards.
4. Meßeinrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die die beiden Lei- tungsabschnitte (5, 6) bildenden Vertiefungen (2) an ihren von den Einmündungssteilen in die Meßkammer (4) abgewandten Enden (10, 11) durch eine Bohrung (17) in dem Schalenteil (1) miteinander verbunden sind, daß in die Bohrung (17) auf halbem Wege zwischen den beiden Enden (10, 11) eine weitere, von außen durch das Schalenteil (1) verlaufende Bohrung (19) unter Bildung der Hilfsgasleitung einmündet und daß die Bohrung (17) beiderseits der Einmündungssteile der weiteren Bohrung (19) jeweils ein Drosselstück (20, 21) enthält. 4. Measuring device according to one of the preceding claims, characterized in that the two line sections (5, 6) forming depressions (2) at their ends facing away from the mouth parts into the measuring chamber (4) (10, 11) through a bore (17) in the shell part (1) are connected to each other so that in the bore (17) halfway between the two ends (10, 11) another, from the outside through the shell part (1) extending bore (19) with formation the auxiliary gas line opens and that the bore (17) contains a throttle piece (20, 21) on both sides of the mouth parts of the further bore (19).
PCT/DE1997/002078 1996-09-20 1997-09-16 Arrangement for the paramagnetic measurement of the oxygen content of a gas to be measured WO1998012552A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29616420.8 1996-09-20
DE29616420U DE29616420U1 (en) 1996-09-20 1996-09-20 Measuring device for paramagnetic measurement of the oxygen content in a measuring gas

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WO1998012552A1 true WO1998012552A1 (en) 1998-03-26

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WO (1) WO1998012552A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6895802B2 (en) * 2002-11-02 2005-05-24 Dräger Medical AG & Co. KGaA Measuring gas cell for a device for measuring the concentration of a paramagnetic gas
EP2485012A1 (en) 2011-02-04 2012-08-08 Siemens Aktiengesellschaft Measuring method
JP2015090349A (en) * 2013-11-07 2015-05-11 富士電機株式会社 Magnetic oxygen analyzer, and sensor unit for magnetic oxygen analyzer
JP2016118478A (en) * 2014-12-22 2016-06-30 富士電機株式会社 Magnetic oxygen analyzing method and magnetic oxygen analyzer
DE102015205118A1 (en) 2015-03-20 2016-09-22 Siemens Aktiengesellschaft Paramagnetic gas sensor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004036684B3 (en) * 2004-07-28 2006-01-26 Eads Deutschland Gmbh Sensor for measuring the oxygen content in an aircraft fuel tank comprises gas channels, a magnet coil and a flow meter integrated in a ceramic module

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302448A (en) * 1963-09-26 1967-02-07 Honeywell Inc Apparatus for supervising the proportion of a magnetically active component in a fluid
FR1569249A (en) * 1968-06-13 1969-05-30
FR2096785A2 (en) * 1970-06-18 1972-02-25 Siemens Ag
DE8703944U1 (en) * 1987-03-16 1987-05-07 Siemens AG, 1000 Berlin und 8000 München Device for measuring the oxygen content of a measuring gas
DE4201216C1 (en) * 1992-01-18 1993-02-25 Gms Gesellschaft Fuer Mikrotechnik Und Sensorik Mbh, 7742 St Georgen, De Oxygen@ sensor for gas mixt. - measures difference in flow speed in two stream channels etched into wafer substrate by two thermo anemometers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302448A (en) * 1963-09-26 1967-02-07 Honeywell Inc Apparatus for supervising the proportion of a magnetically active component in a fluid
FR1569249A (en) * 1968-06-13 1969-05-30
FR2096785A2 (en) * 1970-06-18 1972-02-25 Siemens Ag
DE8703944U1 (en) * 1987-03-16 1987-05-07 Siemens AG, 1000 Berlin und 8000 München Device for measuring the oxygen content of a measuring gas
DE4201216C1 (en) * 1992-01-18 1993-02-25 Gms Gesellschaft Fuer Mikrotechnik Und Sensorik Mbh, 7742 St Georgen, De Oxygen@ sensor for gas mixt. - measures difference in flow speed in two stream channels etched into wafer substrate by two thermo anemometers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6895802B2 (en) * 2002-11-02 2005-05-24 Dräger Medical AG & Co. KGaA Measuring gas cell for a device for measuring the concentration of a paramagnetic gas
EP2485012A1 (en) 2011-02-04 2012-08-08 Siemens Aktiengesellschaft Measuring method
CN102628833A (en) * 2011-02-04 2012-08-08 西门子公司 Measuring method
JP2015090349A (en) * 2013-11-07 2015-05-11 富士電機株式会社 Magnetic oxygen analyzer, and sensor unit for magnetic oxygen analyzer
JP2016118478A (en) * 2014-12-22 2016-06-30 富士電機株式会社 Magnetic oxygen analyzing method and magnetic oxygen analyzer
DE102015205118A1 (en) 2015-03-20 2016-09-22 Siemens Aktiengesellschaft Paramagnetic gas sensor

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Publication number Publication date
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