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DE2617624A1 - Inductive position indicator with ferromagnetic core - has measurement winding with voltage deviations compensated by reference winding - Google Patents

Inductive position indicator with ferromagnetic core - has measurement winding with voltage deviations compensated by reference winding

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Publication number
DE2617624A1
DE2617624A1 DE19762617624 DE2617624A DE2617624A1 DE 2617624 A1 DE2617624 A1 DE 2617624A1 DE 19762617624 DE19762617624 DE 19762617624 DE 2617624 A DE2617624 A DE 2617624A DE 2617624 A1 DE2617624 A1 DE 2617624A1
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Germany
Prior art keywords
winding
core
voltage
position transmitter
inductive position
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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.)
Granted
Application number
DE19762617624
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German (de)
Other versions
DE2617624C2 (en
Inventor
Friedrich Ing Grad Puschban
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Metrawatt GmbH
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Metrawatt GmbH
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Priority to DE19762617624 priority Critical patent/DE2617624C2/en
Publication of DE2617624A1 publication Critical patent/DE2617624A1/en
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Publication of DE2617624C2 publication Critical patent/DE2617624C2/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/204—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
    • G01D5/2046—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils by a movable ferromagnetic element, e.g. a core
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/204—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
    • G01D5/2066—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils by movement of a single coil with respect to a single other coil

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

The magnetic core is movable between a primary winding supplied with a.c. at least one secondary winding. Secondary voltage corresponds to the core position. At least one turn of one or several secondary winding is so mounted in the path of an air-gap in the core, that a variable area is produced in the air-gap. A homogeneous magnetic field, independent from the core position is generated in it, so that a magnetic flux corresponding to the above area is linked with the turn. A further secondary (reference) winding (6) is in parallel with the secondary winding (4, 5) consisting of at least one turn and acting as the measurement winding. An independent from the core position part (A') of the surface (A) surrounded by the winding is linked with the magnetic flux in the core (1) air-gap.

Description

Linearisierung ftlr induktiven Stellungsgeber Linearization for inductive position transmitter

Die Erfindung bezieht sich auf einen induktiven Stellungsgeber gemäß dem Oberbegriff des Anspruches 1 und ist eine Weiterbildung und Verbesserung des der Patent-Hauptanmeldung P 2 511 683 zugrunde liegenden Erfindungsgegenstandes.The invention relates to an inductive position transmitter according to the preamble of claim 1 and is a further development and improvement of the the main patent application P 2 511 683 underlying subject matter of the invention.

Die Genauigkeit und Linearität des in der Hauptanmeldung beschriebenen induktiven Stellungsgebers ist verschiedenen Einflußgrößen unterworfen. So sind die Permeabilität-des zwischen Primär-und Sekundärwicklung angeordneten beweglichen Kernes wie auch der ohmsche Widerstand von Primär- und Sekundärwicklung von der Umgebungstemperatur abhängig. Mechanische Abweichungen zwischen der Bewegungsbahn des Kernes und der Spulenebene führen ebenso zu Unlinearitäten wie eine Beeinflussung des Magnetflusses durch Fremdmagneten oder ferromagnetische Stoffe. Wenn solche Einflußgrößen wirksam werden, ist der gewünschte streng lineare Zusammenhang zwischen der Stellung des Kernes und der in der Sekundärwicklung induzierten Spannung sowie die absolute Größe dieser Spannung nicht mehr gewährleistet.The accuracy and linearity of that described in the parent application inductive position transmitter is subject to various influencing factors. So are the permeability of the movable one arranged between the primary and secondary windings Core as well as the ohmic resistance of the primary and secondary winding of the Ambient temperature dependent. Mechanical deviations between the trajectory of the core and the coil plane lead to non-linearities as well as an influence the magnetic flux through external magnets or ferromagnetic substances. If such Influencing factors become effective, is the desired strictly linear relationship between the position of the core and the voltage induced in the secondary winding as well the absolute magnitude of this tension is no longer guaranteed.

Aufgabe der Erfindung ist es, Mittel zu schaffen, durch die es gelingt, Auswirkungen der genannten Einflußgrößen auf Genauigkeit und Linearität des Stellungsgebers wesentlich herabzusetzen. Diese Aufgabe wird bei einem induktiven Stellungsgeber der eingangs genannten Art durch die in Anspruch 1 gekennzeichneten Merkmale gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen genannt.The object of the invention is to create means by which it is possible to Effects of the mentioned influencing variables on the accuracy and linearity of the position transmitter significantly reduce. This task is performed with an inductive position transmitter of the type mentioned at the outset achieved by the features characterized in claim 1. Advantageous refinements and developments of the invention are set out in the subclaims called.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden näher beschrieben. Es zeigen: Fig.1 den induktiven Stellungsgeber in einer Ausbildung mit zwei Meßwicklungen und einer Referenzwicklung Fig.2 den Verlauf der drei Sekundärwechselspannungen in Abhängigkeit von der Kernstellung Fig.3 das Prinzipschaltbild der Speiseschaltung des induktiven Stellungsgebers Fig.4 eine Ausführungsform der Meß- und Referenzwicklung Fig.5 eine Referenzwicklung mit Linearitäts-Ausgleichs-.,windung Die Hauptanmeldung geht davon aus, daß ein ferromagnetischer Kern 1 zwischen einer mit Wechselstrom gespeisten Primärwicklung 2 und mindestens einer Sekundärwicklung 4 oder 5 beweglich angeordnet ist und sekundärseitig eine Spannung U4 oder U5 abgreifbar ist, deren Wert der Stellung des beweglichen Kernes 1 entspricht. Erfindungsgemäß sieht die Hauptanmeldung vor, daß mindestens eine Windung einer oder auch mehrerer Sekundärwicklungen 4,5 entlang der geradlinigen Bewegungsebene eines von dem Kern 1 gebildeten Luftspaltes ortsfest so angeordnet und bezüglich der von ihr umschlossenen Fläche F so geformt ist, daß abhängig von der Stellung des Kernes 1 ein sich ändernder von der Windung umschlossener Flächenanteil F' innerhalb des Luftspaltes 3, in dem ein von der Stellung des Kernes 1 unabhängiges, vorzugsweise homogenes Magnetfeld ausgebildet ist, so ZU liegen kommt, daß sich ein dem Flächenanteil F' entsprechender Magnetfluß mit der Windung verkettet.Embodiments of the invention are shown in the drawings and are described in more detail below. They show: Fig. 1 the inductive position transmitter in a training with two measuring windings and a reference winding Fig. 2 the course of the three secondary alternating voltages depending on the core position Fig. 3 the basic circuit diagram of the supply circuit of the inductive position transmitter Fig. 4 an embodiment of the measuring and reference winding Fig.5 with a reference winding Linearity compensation -., Winding The main application assumes that a ferromagnetic Core 1 between an alternating current fed primary winding 2 and at least a secondary winding 4 or 5 is movably arranged and a secondary side Voltage U4 or U5 can be tapped, the value of which corresponds to the position of the movable core 1 corresponds. According to the main application provides that at least one Winding of one or more secondary windings 4.5 along the straight line Movement plane of an air gap formed by the core 1 is arranged in a stationary manner and with respect to the area F enclosed by it is shaped so that it is dependent on the position of the core 1 is a changing proportion of the area enclosed by the winding F 'within the air gap 3, in which an independent of the position of the core 1, preferably homogeneous magnetic field is formed so that it comes to lie that a magnetic flux corresponding to the surface area F 'is linked to the winding.

Dabei ist es vorteilhaft, den Kern 1 U-förmig zu gestalten und entlang der Bewegungsebene des zwischen den beiden Schenkeln des Kernes ausgebildeten Luftspaltes 3 mindestens eine keilförmige Sekundärwicklung 5 anzuordnen. Durch die Keilform ändert sich mit der Stellung des Kernes 1 die Teilfläche F' innerhalb der die Sekundärwicklung einen Teil des homogenen Magnetfeldes im Luftspalt erfaßt.It is advantageous to make the core 1 U-shaped and along the plane of movement of the air gap formed between the two legs of the core 3 to arrange at least one wedge-shaped secondary winding 5. Because of the wedge shape changes with the position of the core 1, the partial area F 'within which the secondary winding a part of the homogeneous magnetic field detected in the air gap.

In Fig. 1 sind zwei keilfdrmig Sekundärwicklungen 4 und 5 dargestellt, deren Spannungen U4 und U5 nur Ausbildung einer Mitte- Nullstellung einander überlagert werden können. An der prinzipiellen Wirkungsweise des Stellungsgebers ändert sich dadurch nichts, so daß die folgenden Erläuterungen immer nur eine keilförmige Sekundärwicklung berücksichtigen, wobei diese ihrer Aufgabe entsprechend als Meßwicklung bezeichnet wird.In Fig. 1, two wedge-shaped secondary windings 4 and 5 are shown, whose voltages U4 and U5 only form a mean Zero position can be superimposed on each other. The basic mode of operation of the position transmitter this does not change anything, so that the following explanations are always wedge-shaped Take into account the secondary winding, with this as a measuring winding according to its task referred to as.

Um nun Linearitätsverzerrungen durch die eingangs genannten Einflußgrößen zu kompensieren, sieht die Erfindung außer der Meßwicklung.4nqch eine Referenzwicklung 6 vor, die unabhängig von der Stellung des Kernes eine konstante Spannung abgibt.In order to avoid linearity distortions due to the influencing variables mentioned at the beginning To compensate, the invention provides a reference winding in addition to the measuring winding.4nqch 6, which emits a constant voltage regardless of the position of the core.

Die Referenzwicklung ist dabei so ausgebildet, daß sie eine rechteckige Fläche A umschließt, so daß ein von der Stellung des Kernes unabhängiger konstanter Flächenanteil A' mit dem Magnetfluß im Luftspalt verkettet wird. Um sicher zu stellen, daß die Meß- und Referenzwicklung allen Einflußgrößen in gleichem Maße unterworfen werden, haben sie die gleiche Windungszahl und sind möglichst dicht übereinander angeordnet, wobei ihre Spulenköpfe 21,23 (Fig.4) deckungsgleich übereinander liegen.The reference winding is designed so that it is rectangular Area A encloses, so that a constant, independent of the position of the core Area portion A 'is linked to the magnetic flux in the air gap. To ensure, that the measuring and reference winding are subject to all influencing variables to the same extent they have the same number of turns and are as close together as possible arranged, with their coil heads 21,23 (Figure 4) are congruent one above the other.

Fig.2 zeigt den Verlauf der in den Sekundärwicklungen 4,5,6 erzeugten Spannungen U4, U5, U6. Wie man der Darstellung unmittelbar entnehmen kann, ergibt z.B. die Gegeneinanderschaltung von Wicklung 4 und 6 eine einfache Möglichkeit zur Linearisierung, da gleichsinnige und gleich starke Linearitätsabweichungen bei beiden Spannungen sich auf die Differenzspannung nicht auswirken.2 shows the course of the generated in the secondary windings 4, 5, 6 Voltages U4, U5, U6. As can be seen directly from the illustration, results E.g. the connection of windings 4 and 6 against each other is a simple possibility for Linearization, as there are identical and equally strong linearity deviations in both Stresses do not affect the differential voltage.

Eine noch bessere Verminderung der Einflüsse auf Genauigkeit und Linearität des induktiven Stellungsgebers wird mit der Schaltung nach Fig.3 erzielt. Ein LC-Sinus-Oszillator 11 speist die Primärwicklung 12 mit einer Wechselspannung, deren Amplitude etwa proportional der Speisespannung U15 des OszillatQrs 11 ist. Die auf die Referenzwicklung transformierte Wechselspannung wird über einen Hochpaß 10 zur Unterdrückung von Störspannungen einem aktiven Gleichrichter 13 zugeführt. Die resultierende Spannung U14 wird von einem Regelverstärker 15 mit einer Konstantspannung U16 verglichen. Die sich instellende Ausgang.spannung U15 speist den Oszillator 11. Die Referenzwicklung 6 ist damit Teil eines Regelkreises, der die eingangs genannten Störgrößen entscheidend herabsetzt. Auch der Einfluß von Amplitude und Frequenz der vom Oszillator 11 abgegebenen Wechselspannung Ull sowie Temperatur und Linearitätsfehler, des der Meßwicklung 5 nachgeschalteten Gleichrichters 18 werden durch diese Schaltung vermindert.An even better reduction of the influences on accuracy and linearity of the inductive position transmitter is achieved with the circuit according to Figure 3. An LC sine oscillator 11 feeds the primary winding 12 with an alternating voltage, the amplitude of which is approximately is proportional to the supply voltage U15 of the oscillator 11. The one on the reference winding transformed AC voltage is over a high-pass filter 10 to suppress Interference voltages are fed to an active rectifier 13. The resulting tension U14 is compared by a control amplifier 15 with a constant voltage U16. The resulting output voltage U15 feeds the oscillator 11. The reference winding 6 is thus part of a control loop that includes those mentioned at the beginning Decreases disturbance variables. Also the influence of amplitude and frequency the alternating voltage Ull emitted by the oscillator 11 as well as temperature and linearity errors, of the rectifier 18 connected downstream of the measuring winding 5 are achieved by this circuit reduced.

Die Meßwicklung 5 liefert nun eine Ausgangsspannung U5, die von den genannten Einflußgrößen weitgehend frei ist. Sie wird in einem aktiven Gleichrichter 17, dessen Aufbau exakt dem Gleichrichter 13 entspricht, gleichgerichtet, verstärkt, gesiebt und bildet schließlich das stellungsproportionale Ausgangssignal UA des induktiven Stellungsgebers.The measuring winding 5 now provides an output voltage U5, which of the is largely free. It is in an active rectifier 17, the structure of which corresponds exactly to the rectifier 13, rectified, amplified, sifted and finally forms the output signal UA des, which is proportional to the position inductive position transmitter.

Das Ausgangssignal UA kann nun trotz aller Maßnahmen noch einen Linearitätsfehler aufweisen, der aber entsprechend Anspruch 6 der Hauptanmeldung durch geringfügiges Verschieben der keilförmigen Windungsteile 22 korrigierbar ist. Eine elegantere und besser überschaubare Korrekturmöglichkeit ergibt sich durch geringfügiges Andern der Windungsfläche A der Referenzwicklung entlang der Kernbahn. Dazu wird die innere Windung 25 der Referenzwicklung 24 (Fig.5) etwas nach innen verlegt, etwa in die Mitte der von Windungen freien inneren Fläche der Referenzwicklung. Die Nennlage dieser Windung wird so verändert, daß der mit dem Luftspalt des Kernes 26 verkettete Flächenanteil A" der Referenzwicklung um soviel größer oder kleiner wird, als der Linearitätsfehler ausmacht. Die damit verbundene Änderung der Ausgangsspannung der Referenzwicklung bedingt über den Regelverstärker 15 eine Änderung der primären Erregerspannung, welche den Linearitätsfehler gerade ausgleicht.The output signal UA can still have a linearity error in spite of all measures have, but according to claim 6 of the main application by minor Moving the wedge-shaped winding parts 22 is correctable. A more elegant one and a more manageable correction option results from minor changes the winding area A of the reference winding along the core track. In addition, the inner Turn 25 of the reference winding 24 (Figure 5) moved slightly inward, for example in the Center of the inner surface of the reference winding free of turns. The nominal position this turn is changed in such a way that it is linked to the air gap of the core 26 Area portion A "of the reference winding is so much larger or smaller than the Linearity error. The associated change in the output voltage of the The reference winding causes a change in the primary via the control amplifier 15 Excitation voltage, which just compensates for the linearity error.

LeerseiteBlank page

Claims (7)

Patentansprüche j½i.inutiver Stellungsgeber, bei dem ein ferromagnetischer Kern Zwischen einer mit Wechselstrom gespeisten Primärwicklung und mindestens einer Sekundärwicklung beweglich angeordnet ist und sekundärseitig eine Spannung abgreifbar ist, deren Wert der jewefligen^Stellung des beweglichen Kernes entspricht und daß mindestens eine Windung einer oder mehrerer Sekundärwicklungen entlang der geradlinigen Bewegungsebene eines von dem Kern gebildeten Luftspaltes ortsfest so angeordnet und bezüglich der von ihr umschlossenen Fläche so geformt ist, daß abhängig von der Stellung des Kernes ein sich ändernder, von der Windung umschlossener, Flächenanteil innerhalb des Luftspaltes in dem ein von der Stellung des Kernes unabhängiges, vorzugsweise homogenes Magnetfeld ausgebildet ist, so zu liegen kommt, daß sich ein dem Flächenanteil entsprechender Magnetfluß mit der Windung verkettet (Patent-Hauptanmeldung P 2 511 683), dadurch gekennzeichnet, daß parallel zu der aus mindestens einer Windung bestehenden Sekundärwicklung (4,5) die als Meßwicklung dient, eine weitere als Referenzwicklung dienende Sekundärwicklung (6) so angeordnet und geformt ist, daß unabhängig vcn der Stellung des Kernes (1) ein im wesentlichen konstanter Teil A' der von der Wicklung umschlossenen Fläche A mit dem Magnetfluß im Luftspalt (3) des Kernes (1) verkettet ist und daß die Meßwicklung (4,5) und die Referenzwicklung (6) über eine elektrische Schaltung so zusammenwirken, daß Änderungen der durch die die Referenzwicklung erzeugten Spannung (U6) auf Meßwertabweichungen der durch die Meßwicklung erzeugten Spannung (U4, U5) kompensierend wirkt. Claims j½i.inutiver position transmitter in which a ferromagnetic Core Between a primary winding fed with alternating current and at least one Secondary winding is movably arranged and a voltage can be tapped on the secondary side whose value corresponds to the respective position of the movable core and that at least one turn of one or more secondary windings along the straight line Movement plane of an air gap formed by the core so arranged in a stationary manner and is shaped with respect to the area enclosed by it so that dependent on the position of the core is a changing area portion enclosed by the winding within the air gap in which one of the position of the core is independent, preferably homogeneous magnetic field is formed, comes to lie in such a way that the surface portion corresponding magnetic flux concatenated with the winding (main patent application P 2 511 683), characterized in that parallel to the consisting of at least one turn Secondary winding (4,5) which serves as a measuring winding, another as a reference winding serving secondary winding (6) is arranged and shaped so that independently vcn the position of the core (1) a substantially constant part A 'that of the winding enclosed area A is chained to the magnetic flux in the air gap (3) of the core (1) is and that the measuring winding (4,5) and the reference winding (6) via an electrical Circuit work together so that changes in the generated by the reference winding Voltage (U6) for measured value deviations of the voltage generated by the measuring winding (U4, U5) has a compensating effect. 2. Induktiver Stellungsgeber nach Anspruch 1, dadurch gekennzeichnet, daß die Referenzwicklung (6,24) nach dem Prinzip der gedruckten Schaltung auf einer Trägerplatte aufgebaut ist und zusammen mit der Meßwicklung (4,25) so ausgeführt und angeordnet ist, daß beide Wicklungen die gleiche Windungszahl besitzen und möglichst unmittelbar, im Bereich der Spulenköpfe (21,23) deckungsgleich, übereinander liegen. 2. Inductive position transmitter according to claim 1, characterized in that that the reference winding (6,24) on the principle of the printed circuit on a Carrier plate is constructed and together with the measuring winding (4.25) is designed and arranged so that both windings have the same number of turns and as directly as possible, congruent in the area of the coil heads (21, 23), lie on top of each other. 3. Induktiver Stellungsgeber nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die von der inneren Windung (25) der Referenzwicklung (24) umschlossene Fläche entlang der Bewegungsebene des Kernes (26) unterschiedlich breit ist, so daß sich der mit dem Luftspalt des Kernes (26) verkettete Flächenanteil A'' ändert.3. Inductive position transmitter according to claim 1 or 2, characterized in that that the area enclosed by the inner turn (25) of the reference winding (24) along the plane of movement of the core (26) is of different widths, so that the area portion A ″ linked to the air gap of the core (26) changes. 4. Induktiver Stellungsgeber nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Meßwicklung (4) und die Referenzwicklung (6) gegeneinander geschaltet sind und an ihren Enden die Differenzspannung (U6-U4) abgreifbar ist.4. Inductive position transmitter according to one of claims 1 to 3, characterized characterized in that the measuring winding (4) and the reference winding (6) against each other are switched and the differential voltage (U6-U4) can be tapped at their ends. 5. Induktiver Stellungsgeber nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die von der Referenzwicklung (6) abgegebene Referenzspannung (U6) in einem Regelkreis derart auf einen Oszillator (11) wirkt, daß die von ihm zur Speisung der Primärwicklung (12) abgegebene Wechselspannung (U11) Änderungen der Referenzspannung (U6) entgegenwirkt.5. Inductive position transmitter according to one of claims 1 to 4, characterized characterized in that the reference voltage output by the reference winding (6) (U6) acts in a control loop on an oscillator (11) in such a way that the AC voltage (U11) output to feed the primary winding (12) Changes counteracts the reference voltage (U6). 6. Induktiver Stellungsgeber nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die vom Oszillator (11) erzeugte Wechselspannung (U11) der ihm zugeführten Speisespannung (U15) proportional ist und ein Regelverstärker (15), der die von der Referenzwicklung (6) abgegebene gleichgerichtete Spannung (U14) mit einer Konstantspannung (U16) vergleicht, die Speisespannung (U15) fUr den Oszillator abgibt.6. Inductive position transmitter according to one of claims 1 to 5, characterized characterized in that the alternating voltage (U11) generated by the oscillator (11) of him supplied supply voltage (U15) is proportional and a control amplifier (15), the rectified voltage (U14) output by the reference winding (6) with a constant voltage (U16) compares the supply voltage (U15) for the oscillator gives away. 7. Induktiver Stellungsgeber nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die von der Referenzwicklung (6) und der Meßwicklung (5) erzeugten Wechselspannungen (U5, U6) aktiven Gleichrichtern (13,17) und Hochpässen (10,18) zugeführt sind.7. Inductive position transmitter according to one of claims 1 to 6, characterized characterized in that those generated by the reference winding (6) and the measuring winding (5) AC voltages (U5, U6) active rectifiers (13.17) and high-pass filters (10.18) are supplied.
DE19762617624 1976-04-22 1976-04-22 Linearization for inductive position transmitter Expired DE2617624C2 (en)

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DE19762617624 DE2617624C2 (en) 1976-04-22 1976-04-22 Linearization for inductive position transmitter

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DE2617624A1 true DE2617624A1 (en) 1977-11-03
DE2617624C2 DE2617624C2 (en) 1986-04-03

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0074301A2 (en) * 1981-08-28 1983-03-16 The Bendix Corporation Linear position sensor
FR2682760A1 (en) * 1991-10-22 1993-04-23 Prototype Mecanique Ind Contactless linear or angular displacement sensors
NL1011265C2 (en) * 1999-02-10 2000-02-17 Applied Power Inc Linear position sensor has two coils magnetically coupled by moveable yoke is more accurate and less temperature sensitive than previous magnetic position sensors
WO2000065299A2 (en) * 1999-04-23 2000-11-02 Scientific Generics Limited Position sensor
DE10120822C2 (en) * 2000-09-20 2003-03-06 Balluff Gmbh Inductive displacement sensor with linear characteristic behavior
DE10312813A1 (en) * 2003-03-21 2004-10-07 Ifm Electronic Gmbh Inductive position sensor has a control element whose position is detected using an arrangement of transmitter and receiving coils with the former having fewer thicker windings and the latter more thinner windings
DE102018220458A1 (en) * 2018-11-28 2020-05-28 Zf Friedrichshafen Ag Sensor arrangement
CN113196013A (en) * 2018-12-10 2021-07-30 Zf腓德烈斯哈芬股份公司 Inductive detection of rotation angle

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DE4127209C2 (en) * 1991-08-16 1996-05-23 Mehnert Walter Dr Encoder for inductive generation of a measurement signal

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DE1214891B (en) * 1963-08-30 1966-04-21 Licentia Gmbh Inductive pick-up device

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DE1214891B (en) * 1963-08-30 1966-04-21 Licentia Gmbh Inductive pick-up device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0074301A3 (en) * 1981-08-28 1985-05-22 The Bendix Corporation Linear position sensor
EP0074301A2 (en) * 1981-08-28 1983-03-16 The Bendix Corporation Linear position sensor
FR2682760A1 (en) * 1991-10-22 1993-04-23 Prototype Mecanique Ind Contactless linear or angular displacement sensors
NL1011265C2 (en) * 1999-02-10 2000-02-17 Applied Power Inc Linear position sensor has two coils magnetically coupled by moveable yoke is more accurate and less temperature sensitive than previous magnetic position sensors
US6642710B2 (en) 1999-04-23 2003-11-04 Scientific Generics Limited Position sensor
WO2000065299A2 (en) * 1999-04-23 2000-11-02 Scientific Generics Limited Position sensor
WO2000065299A3 (en) * 1999-04-23 2001-03-22 Scient Generics Ltd Position sensor
DE10120822C2 (en) * 2000-09-20 2003-03-06 Balluff Gmbh Inductive displacement sensor with linear characteristic behavior
DE10312813A1 (en) * 2003-03-21 2004-10-07 Ifm Electronic Gmbh Inductive position sensor has a control element whose position is detected using an arrangement of transmitter and receiving coils with the former having fewer thicker windings and the latter more thinner windings
DE10312813B4 (en) * 2003-03-21 2009-08-27 Ifm Electronic Gmbh Inductive displacement sensor
DE102018220458A1 (en) * 2018-11-28 2020-05-28 Zf Friedrichshafen Ag Sensor arrangement
CN113196013A (en) * 2018-12-10 2021-07-30 Zf腓德烈斯哈芬股份公司 Inductive detection of rotation angle
CN113196013B (en) * 2018-12-10 2024-03-01 Zf腓德烈斯哈芬股份公司 Inductance detection of rotation angle

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