DE749853C - Method for the analysis of substance, in particular gas mixtures by magnetic means - Google Patents

Method for the analysis of substance, in particular gas mixtures by magnetic means

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Publication number
DE749853C
DE749853C DEA93620D DEA0093620D DE749853C DE 749853 C DE749853 C DE 749853C DE A93620 D DEA93620 D DE A93620D DE A0093620 D DEA0093620 D DE A0093620D DE 749853 C DE749853 C DE 749853C
Authority
DE
Germany
Prior art keywords
substance
analysis
magnetic field
flow
magnetic
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.)
Expired
Application number
DEA93620D
Other languages
German (de)
Inventor
Dr Phil Friedrich Klauer
Dr Erwin Turowski
Tielmann Baron Dr V Wolff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Auergesellschaft GmbH
Original Assignee
Auergesellschaft GmbH
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 Auergesellschaft GmbH filed Critical Auergesellschaft GmbH
Priority to DEA93620D priority Critical patent/DE749853C/en
Application granted granted Critical
Publication of DE749853C publication Critical patent/DE749853C/en
Expired legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/74Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables of fluids

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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)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Description

Es ist bekannt, magnetisch beeinflußbare Stoffe dadurch zu analysieren, da.ß die bei Einwirkung eines Magnetfeldes auftretende Temperaturänderung eines von dem zu analysierenden Stoffgemisch umgebenen geheizten Körpers gemessen. wird. It is known to analyze magnetically influenceable substances by da.ß the change in temperature that occurs when exposed to a magnetic field measured by the heated body surrounded by the mixture of substances to be analyzed. will.

Es ist weiterhin vorgeschlagen worden, eine Analyse auf magnetischem Wege durch Messen der Kräfte vorzunehmen, die auftreten, wenn Stoffe verschiedener Sustzeptibilität einem inhomogenen Magnetfeld ausgesetzt werden, insbesondere durch Messen der Strömung, die auftritt, wenn Stoffe! verschiedener Suszeptibilität einem inhomogenen Magnetfeld ausgesetzt werden. Insbesondere kann man dabei die Strömung messen, die auftritt, wenn die Suszeptibilität des zu analysierenden Stoffgemisches an einer im inhomogenen Teil eines Magnetfeldes liegen den Stelle durch Änderung einer Zustandsgröße, z. B. der Temperatur, auf einen anderen Wert gebracht wird. Das läßt skh z. B. mittels eines im inhomogenen Teil des Magnetfeldes liegenden Heizdrahtes erreichten. It has also been suggested to do an analysis on magnetic To make ways by measuring the forces that occur when substances are different Susceptibility to be exposed to an inhomogeneous magnetic field, in particular by Measure the flow that occurs when substances! different susceptibility one exposed to inhomogeneous magnetic fields. In particular, you can do this with the flow measure that occurs when the susceptibility of the substance mixture to be analyzed at one in the inhomogeneous part of a magnetic field, the point is due to change a state variable, e.g. B. the temperature, is brought to a different value. That leaves skh z. B. by means of a lying in the inhomogeneous part of the magnetic field Reached the heating wire.

Die Stärke einer durch diese Kräfte ausgelösten Strömung ist unter sonst gleichen Bedingungen von der Suszeptibhilität des zu analysierenden Stoffgemisches abhängig. Besteht d!ieses Stoffgemisch etwa aus Gasen, von denen nur eines eine Suszeptihilität hat, deren Wert sich erheblich von Null unterscheidet, so entspricht die Stärke der Strömung der Konzentration dieses Gases in dem zu untersuchenden Gemisch. Sie ist ibr aber, wie Messungen ergeben haben, nicht ohne weiteres direkt proportional. Trägt man gemäß der Abbildung bei einer bestimmten magnetiscben Feldstärke die Abhängigkeit der Stärke der Strömung von der Konzentration des Gases auf, dessen Suszeptibilität sich im Gegensatz zu der der übrigen in dem Gemisch vorhandenen Gase vom Wert Null unterscheidet, so erh.ält man z. B. die Kurve a. The strength of a current triggered by these forces is below otherwise the same conditions of susceptibility of the substance mixture to be analyzed addicted. Does this mixture of substances consist of gases, of which only one Has susceptibility, the value of which is significantly different from zero, corresponds to the strength of the flow of the concentration of this gas in the investigated Mixture. However, as measurements have shown, it is not necessarily straightforward proportional. If one wears according to the figure at a certain magnetic field strength the dependence of the strength of the flow on the concentration of the gas on whose Susceptibility is in contrast to that of the rest present in the mixture If gases differ from the value zero, one obtains e.g. B. the curve a.

Es hat sich nun gezeigt, daß diese Anzeigecharakteristik von verschiedenen Faktoren abhängig ist, insbesondere, wenn es sich um einen Strömungsvorgang handelt, von der Form der Meßzelle und der Polschuhe, von der Stärke des Heizdrahtes, von in der Meßzelle angeordneten Strömungswiderständen, sowie von der magnetischen Feldstärke. Durch passende Bemessung dieser Größen läßt sich die Kurve a ändern und in eine' jeweils gewünscht, zweckmäßige Form bringen. It has now been shown that this display characteristic of different Factors, especially if it is a flow process, of the shape of the measuring cell and the pole pieces, of the thickness of the heating wire, of flow resistances arranged in the measuring cell, as well as the magnetic field strength. By appropriately dimensioning these quantities, the curve a can be changed and converted into a ' each desired, bring appropriate shape.

Besonders wichtig ist die Abhängigkeit der Meßcharakteristik von der magnetischen Feldstärke. In der Abbildung ist auch noch eine Kurve b dargestellt, die bei erhöhter man tische,r Feldstärke aufgenommen wurde Während bei der Kurve a zwischen o und I000/o Konzentration des zu messenden Gases ein annähernd gleichmäßiges Anwachsen der Strömung festzustellen ilst, steigt die Kurve b im Anfang steiler an, verläuft dann aber wesentlich flacher als die Kurve «. Der obere Teil der Kurve b trägt also den Charakter e.'jner Sättigung. Der größeren Steilheit entspricht nun eine größere Empfindlichkeit im Bereich geringerer Konzentration. Man wendet daher zweckmäßig große Feldstärken an, wenn eine größere. Empfindlichkeit im Bereich ge.ringelrer Konzentration gewünscht wird, und begrenzt die Feldstärke, wenn eine annähernd gleichbleibende Empfindlichkeit über den gesamten Bereich der KonzentratioH nen zwischen o und I00°/o verlangt wird. The dependence of the measurement characteristics on is particularly important the magnetic field strength. The figure also shows a curve b, which was recorded with increased field strength while with the curve a between 0 and 1000/0 concentration of the gas to be measured an approximately uniform If the flow increases, curve b rises more steeply at the beginning on, but then runs much flatter than the curve «. The top of the curve b thus has the character of saturation. Corresponds to the greater steepness now a greater sensitivity in the area of lower concentration. One turns therefore expediently large field strengths, if a greater one. Sensitivity in the area less concentration is desired, and limits the field strength if a almost constant sensitivity over the entire range of concentration between 0 and 100 ° / o is required.

Diese Änderungen der Feldstärke lassen sich natürlich auch leicht an einem fertigen Meßsystem vornehmen, z.B. durch Anbringen eines magnetischen Nebenschlusses.These changes in the field strength can of course also be made easily on a finished measuring system, e.g. by attaching a magnetic shunt.

Claims (1)

PATENTANSPRUCH: Verfahren zur Analyse von Stoff-, insbesondere Gasgemischen auf magnetischem Wege, bei dem das zu untersuchende Stoffgemisch einem Magnetfeld ausgesetzt, an eine insbeso,ndere im inhomogenen Teil des Feldes liegende Stelle ein Stoff anderer Suszeptibilität gebracht und. die dabei auftretende, insbesondere eine Strömung auslösende Kraft gemessen wird, dadurch geinuzeichnet, daß unter son.st gleichen Verhältnissen die Stärke der bei einem Stoff bestimmter Suszeptibilität auftretenden Strömung durch Änderung der magnetischen Feldstärke, beispielsweise mit Hilfe eines magnetischen Nebenschlusses, verändert wird. PATENT CLAIM: Method for the analysis of substance, especially gas mixtures by magnetic means, in which the substance mixture to be examined is exposed to a magnetic field exposed, in particular to a different location in the inhomogeneous part of the field brought a substance of different susceptibility and. the occurring, in particular a force triggering a flow is measured, characterized by the fact that under son.st in the same relationship, the strength of the susceptibility determined for a substance occurring flow by changing the magnetic field strength, for example with the help of a magnetic shunt, is changed. Zur Abgrenzung des Erfindungsgegenstands vom Stand der Technik ist im Erteilungsverfahren folgende Druckschrift in Betracht gezogen. worden: H. Rein, »Schriften. der Deutschen Akademie der Luftfahrtforschung«, 1940, Heft II. To differentiate the subject matter of the invention from the state of the art is The following publication was considered in the granting procedure. been: H. Rein, “Fonts. of the German Academy of Aviation Research «, 1940, issue II.
DEA93620D 1941-06-18 1941-06-18 Method for the analysis of substance, in particular gas mixtures by magnetic means Expired DE749853C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA93620D DE749853C (en) 1941-06-18 1941-06-18 Method for the analysis of substance, in particular gas mixtures by magnetic means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA93620D DE749853C (en) 1941-06-18 1941-06-18 Method for the analysis of substance, in particular gas mixtures by magnetic means

Publications (1)

Publication Number Publication Date
DE749853C true DE749853C (en) 1952-09-29

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Family Applications (1)

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DEA93620D Expired DE749853C (en) 1941-06-18 1941-06-18 Method for the analysis of substance, in particular gas mixtures by magnetic means

Country Status (1)

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DE (1) DE749853C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959332C (en) * 1953-08-23 1957-03-07 Siemens Ag Arrangement for measuring the deviation of the concentration of gases with a magnetic or electrical dipole moment from a given target value

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959332C (en) * 1953-08-23 1957-03-07 Siemens Ag Arrangement for measuring the deviation of the concentration of gases with a magnetic or electrical dipole moment from a given target value

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