DE232676C - - Google Patents

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Publication number
DE232676C
DE232676C DENDAT232676D DE232676DA DE232676C DE 232676 C DE232676 C DE 232676C DE NDAT232676 D DENDAT232676 D DE NDAT232676D DE 232676D A DE232676D A DE 232676DA DE 232676 C DE232676 C DE 232676C
Authority
DE
Germany
Prior art keywords
quartz
aluminum oxide
pyrometer
insulators
resistance
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.)
Active
Application number
DENDAT232676D
Other languages
German (de)
Publication of DE232676C publication Critical patent/DE232676C/de
Active legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
    • G01K7/20—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer in a specially-adapted circuit, e.g. bridge circuit
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Die vorliegende Erfindung betrifft ein Pyrometer, bei dem die Widerstandsveränderung eines Isolators bei höherer Temperatur gemessen werden soll. Dabei ist zu berücksichtigen, daß dem Widerstand der Isolatoren zwei verschiedene Eigenschaften zugrunde gelegt werden. Die Gesamtleitfähigkeit der Isolatoren bei sehr hohen Temperaturen setzt sich nämlich zusammen aus der elektrolyti-The present invention relates to a pyrometer in which the resistance change an isolator is to be measured at a higher temperature. It must be taken into account that the resistance of the insulators is based on two different properties will. The overall conductivity of the insulators at very high temperatures continues namely together from the electrolytic

lp sehen Leitung, die sich nicht proportional zur Temperatur verändert, und der Elektronenleitung, die im einfachen Verhältnis von der Temperatur abhängig ist. Bis zu einer gewissen Temperatur, die an sich auch noch hoch ist, kommt daher für Isolatoren die ■ elektrolytische Leitfähigkeit nicht in Betracht. Materialien, bei denen nun diese Temperaturen sehr hoch sind, sind Quarz, Aluminiumoxyd, Zirkonerde und ähnliche. Derartige Isolatoren sollen bei dem neuen Pyrometer verwendet werden.lp see line that is not proportional to Temperature changes, and the conduction of electrons, which is in the simple proportion of the Temperature is dependent. Up to a certain temperature, which in itself also is high, the electrolytic conductivity is therefore out of the question for insulators. Materials at which these temperatures are now very high are quartz, aluminum oxide, Zirconia and the like. Such isolators are to be used in the new pyrometer.

In der Figur ist α ein Rohr aus Quarz, Aluminiumoxyd, Zirkon- oder Tonerde, innerhalb und außerhalb dessen bis zu einer bestimmten Höhe ein guter Leiter b für Elektrizität (beispielsweise Graphit oder Platin) angeordnet ist. Das Ganze befindet sich in einem durch einen Deckel e abgeschlossen Behälter c aus feuerfestem Stoff. Die Zuführungsdrähte d vermitteln den elektrischen Anschluß an die Stromquelle. Die Stopfen f, aus hochfeuerfesten Materialien von geringer Leitfähigkeit, bewirken den genauen Abschluß der Kontaktflächen. Der Betrieb des Instrumentes gestaltet sich in folgender" Weise: An den Zuführungsdrähten d wird eine hohe Spannung angelegt und in dem Stromkreise ein Milliamperemeter eingeschaltet. Die in dem Stromkreise eingeschaltete Fläche des' Rohres a hat einen sehr hohen Widerstand. Der spezifische Widerstand des Quarzes beträgt beispielsweise bei 7270 = 4 · io4 Ohm und bei 10000 etwa 1,4 · io4 Ohm. Bei passender Wahl der Dimensionen wird der Widerstand eines Quarzrohres bei iooo0 etwa 2000 0hm, wobei dann bei Anlegung einer Spannung von 110 Volt ' der Meßstrom einen Wert von 55 Milliamperemetern ergeben würde, eine Größe, die einen sehr vorteilhaften Meßstrom darstellt. Der geringe Widerstand der Zuführung kat keine Ungenauigkeiten zur Folge.In the figure, α is a tube made of quartz, aluminum oxide, zirconium or alumina, inside and outside of which a good conductor b for electricity (for example graphite or platinum) is arranged up to a certain height. The whole is in a container c made of fireproof material and closed by a lid e. The lead wires d provide the electrical connection to the power source. The plugs f, made of highly refractory materials of low conductivity, effect the exact closure of the contact surfaces. The operation of the instrument is as follows: A high voltage is applied to the supply wires d and a milliammeter is switched on in the circuit. The area of the tube a which is switched on in the circuit has a very high resistance. The specific resistance of the quartz is for example, at 727 0 = 4 · io 4 ohms and at 1000 0 about 1.4 · io 4 ohms. With a suitable choice of dimensions, the resistance of a quartz tube at iooo 0 is about 2000 ohms, with a voltage of 110 volts then being applied. the measuring current would result in a value of 55 milliammers, a value which represents a very advantageous measuring current.The low resistance of the feed does not result in any inaccuracies.

Claims (2)

Patent-Ansprüche:Patent Claims: 1. Elektrisches Widerstands-Pyrometer, gekennzeichnet durch die Verwendung von Isolatoren, wie Quarz, Aluminiumoxyd, Ton- oder Zirkonerde, die selbst bei hohen Temperaturen den Strom nur durch Elektronenleitung, nicht durch elektrolytische Leitung, leiten.1. Electrical resistance pyrometer, characterized by the use of Insulators, such as quartz, aluminum oxide, clay or zirconia, which even with high Temperatures conduct electricity only through electron conduction, not through electrolytic conduction. 2. Ausführungsform des Pyrometers nach Anspruch 1, dadurch gekennzeichnet, daß innerhalb und außerhalb eines Rohres (a) aus Quarz, Aluminiumoxyd, Zirkon- oder Tonerde ein guter Leiter (b) mit gutem Kontakt angeordnet ist, in den die Zuleitungsdrähte (d) für den Meßstrom eingebettet sind.2. Embodiment of the pyrometer according to claim 1, characterized in that inside and outside a tube (a) made of quartz, aluminum oxide, zirconium or alumina, a good conductor (b) is arranged with good contact, in which the lead wires (d) for the measuring current are embedded. Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.
DENDAT232676D Active DE232676C (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728836A (en) * 1951-06-07 1955-12-27 Phillips Petroleum Co Temperature sensing element
US2745284A (en) * 1952-02-20 1956-05-15 Pittsburgh Plate Glass Co Glass radiometer
DE1033915B (en) * 1952-04-28 1958-07-10 Ingbuero Weisheit & Co Device for measuring and regulating physical quantities and states in fluid media with heated resistance thermometers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728836A (en) * 1951-06-07 1955-12-27 Phillips Petroleum Co Temperature sensing element
US2745284A (en) * 1952-02-20 1956-05-15 Pittsburgh Plate Glass Co Glass radiometer
DE1033915B (en) * 1952-04-28 1958-07-10 Ingbuero Weisheit & Co Device for measuring and regulating physical quantities and states in fluid media with heated resistance thermometers

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