DE455077C - Arrangement for displaying or registering the product of two variable measurement values - Google Patents

Arrangement for displaying or registering the product of two variable measurement values

Info

Publication number
DE455077C
DE455077C DEH108975D DEH0108975D DE455077C DE 455077 C DE455077 C DE 455077C DE H108975 D DEH108975 D DE H108975D DE H0108975 D DEH0108975 D DE H0108975D DE 455077 C DE455077 C DE 455077C
Authority
DE
Germany
Prior art keywords
product
measured
variable
arrangement
registering
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
DEH108975D
Other languages
German (de)
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.)
ABB Training Center GmbH and Co KG
Original Assignee
Hartmann and Braun AG
Publication date
Priority to DEH108975D priority Critical patent/DE455077C/en
Application granted granted Critical
Publication of DE455077C publication Critical patent/DE455077C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/08—Measuring resistance by measuring both voltage and current
    • G01R27/10—Measuring resistance by measuring both voltage and current using two-coil or crossed-coil instruments forming quotient
    • G01R27/12—Measuring resistance by measuring both voltage and current using two-coil or crossed-coil instruments forming quotient using hand generators, e.g. meggers

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Description

Anordnung zur Anzeige oder Registrierung des Produkts zweier veränderlicher 1VIeßgrößen. Man hat bisher mit spannungsunabhängigen Wechselstromohmmetern, wie sie z. B. in dem Patent 419 774 beschrieben werden, immer einen Widerstand oder aber die Differenz zweier Widerstände gemessen. Die vorliegende Erfindung betrifft eine Anordnung, bei der die Ohmmeteranzeige proportional. dem Produkt zweier Widerstände oder dem Produkt aus einer Widerstandsdifferenz und einem anderen Widerstand ist.Arrangement for displaying or registering the product of two changeable 1VIe sizes. One has so far with voltage-independent alternating current ohmmeters, such as she z. B. in the patent 419 774 always a resistor or but measured the difference between two resistances. The present invention relates to an arrangement in which the ohmmeter reading is proportional. the product of two resistances or the product of a resistance difference and another resistance.

Die Schaltung des in dem Patent 4t9774 beschriebenen Instruments zeigt Abb. i. Es bedeuten F die feste Feldspule, S1 und zwei gleiche Teile einer Differentialdrehspule, R., den zu messenden Widerstand, R" einen Vergleichswiderstand, Rrz einen Nebenschlußwiderstand. Der Instrumentausschlag ist proportional einer Konstanten mal der Differenz (R" - R") mal der Spannung, die an dem Widerstand R. herrscht.The circuit of the instrument described in patent 4t9774 is shown in FIG Fig.i. F is the fixed field coil, S1 and two equal parts of a rotary differential coil, R., the resistance to be measured, R "a comparison resistance, Rrz a shunt resistance. The instrument deflection is proportional to a constant times the difference (R " - R ") times the voltage that prevails across the resistor R.

Läßt man nun 1?x sich irgendeiner Meßgröße und außerdem noch R" sich irgendeiner anderen Meßgrößa proportional ,ändern, so zeigt das Instrument das Produkt der beiden Größen an, und zwar unabhängig von Schwankungen der verwendeten Meßspannung.If one now lets 1? X any measurable quantity and also R "itself proportional to any other measured variable, the instrument shows the product of the two quantities, regardless of fluctuations in the measuring voltage used.

Ein. Anwendungsbeispiel sei beschrieben: Rx und R" seien Widerstandsthermometer, R" eine auf eine Mengenmesserachse gesetzte Fernübertragerwiderstandswalze. Die Schaltung ist aus Abb. 2 ersichtlich. Die Bezeichnungen sind die der Abb. i. W bedeutet die Fernübertragerwalze. Das Instrument zeigt das Produkt Menge mal Temperaturdifferenz an, also eine Wärmemenge.A. Application example is described: Rx and R "are resistance thermometers, R "is a remote transmitter resistance roller placed on a flow meter axis The circuit is shown in Fig. 2. The designations are those of Fig. I. W means the remote transfer roller. The instrument shows the product of the quantity times the temperature difference on, so an amount of heat.

Man kann auch die Fernübertragerwalze mit einem Nebenschluß versehen und das Instrument nach Abb. 3 schalten. Das Wesentliche ist nur, daß durch die Änderung des einen Widerstandes R" der Differentialdrehspule eine der Widerstandsänderung proportionale Spannung zugeführt wird, während durch die Änderung des anderen Widerstandes R" das Verhältnis der Ströme in den beiden Wicklungen der Differentialspule dem Widerstande proportional geändert wird. Rechnung und Versuch zeigen, daß man die Widerstände so dimensionieren kann, daß die Produktbildung nur mit einem völlig vernachlässigbaren Fehler behaftet ist.The remote transfer roller can also be shunted and switch the instrument according to Fig. 3. The essential thing is that through the Change of one resistance R "of the differential rotating coil one of the resistance change proportional voltage is supplied while changing the other resistance R "denotes the ratio of the currents in the two windings of the differential coil Resistances is changed proportionally. Calculation and experiment show that you can Resistors can be dimensioned in such a way that the product formation is only complete with one is afflicted with negligible errors.

Claims (1)

PATENTANSPRÜCHE: i. Anordnung zur Anzeige oder Registrierung des Produkts zweier veränderlicher Meßgrößen auf elektrischem Wege, bei der die Änderung beider Meßgrößen in irgendeiner bekannten Weise in proportionale Änderungen von Ohmschen oder Wechselstromwiderständen überführt sind, dadurch gekennzeichnet, daß ein spannungsunabhängiges Ohmmeter für Wechselstrom mit einer Differentialdrehspule ohne äußere Richtkraft Verwendung findet in einer Schaltung, bei welcher der eine, der ersten Meßgröße entsprechende veränderliche Widerstand mit dem einen Teil der Differentialdrehspule hintereinandergeschaltet ist und der andere, der zweiten Meßgröße entsprechende Widerstand dem Kreis der Differentialspule eine der Meßgröße proportionale Spannung zuführt. a. Anordnung nach Anspruch i, dadurch gekennzeichnet, daß der der zweiten Meßgröße entsprechende veränderliche Widerstand der eine Teil eines als Spannun!gsteiler geschalteten Widerstandes ist, der mit einem Schleifkontakt versehen ist. 3. Anordnung nach Anspruch i, dadurch gekennzeichnet, daß noch ein einer weiteren Meßgröße entsprechender veränderlicher Widerstand mit dem zweiten Teil der Differentialdrehspule hintereinandergeschaltet ist, so daß das Instrument das Produkt aus der Differenz zweier Größen und einer dritten Größe anzeigt.PATENT CLAIMS: i. Arrangement for displaying or registering the product two variable measured quantities by electrical means, in which the change in both Measured quantities in any known manner in proportional changes of ohmic or alternating current resistors, characterized in that a voltage-independent Ohmmeter for alternating current with a differential rotating coil without external straightening force It is used in a circuit in which the one, the first measured variable corresponding variable resistance with the one part of the rotating differential coil is connected in series and the other corresponding to the second measured variable Resistance to the circuit of the differential coil a voltage proportional to the measured variable feeds. a. Arrangement according to claim i, characterized in that the second Measured variable corresponding to the variable resistance of a part of a voltage divider switched resistor, which is provided with a sliding contact. 3. Arrangement according to claim i, characterized in that there is also one corresponding to a further measured variable variable resistance connected in series with the second part of the rotary differential coil is, so that the instrument is the product of the difference between two quantities and one third size.
DEH108975D Arrangement for displaying or registering the product of two variable measurement values Expired DE455077C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH108975D DE455077C (en) Arrangement for displaying or registering the product of two variable measurement values

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH108975D DE455077C (en) Arrangement for displaying or registering the product of two variable measurement values

Publications (1)

Publication Number Publication Date
DE455077C true DE455077C (en) 1928-01-23

Family

ID=7170694

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH108975D Expired DE455077C (en) Arrangement for displaying or registering the product of two variable measurement values

Country Status (1)

Country Link
DE (1) DE455077C (en)

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