DE102008023651A1 - Measuring-/switching device i.e. field device, for use in automation engineering field to detect process variables, has conductive coils and magnetic field sensor for transforming rotational movement of transducer into electrical signal - Google Patents

Measuring-/switching device i.e. field device, for use in automation engineering field to detect process variables, has conductive coils and magnetic field sensor for transforming rotational movement of transducer into electrical signal Download PDF

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Publication number
DE102008023651A1
DE102008023651A1 DE102008023651A DE102008023651A DE102008023651A1 DE 102008023651 A1 DE102008023651 A1 DE 102008023651A1 DE 102008023651 A DE102008023651 A DE 102008023651A DE 102008023651 A DE102008023651 A DE 102008023651A DE 102008023651 A1 DE102008023651 A1 DE 102008023651A1
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Prior art keywords
rotation
axis
housing
measuring
switching device
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DE102008023651A
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German (de)
Inventor
Matthias Knopp
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Endress and Hauser Conducta GmbH and Co KG
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Endress and Hauser Conducta Gesellschaft fuer Mess und Regeltechnik mbH and Co KG
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Publication of DE102008023651A1 publication Critical patent/DE102008023651A1/en
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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/10—Input arrangements, i.e. from user to vehicle, associated with vehicle functions or specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/25—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using haptic output
    • 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
    • G01D5/142—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 using Hall-effect devices
    • G01D5/145—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 using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • 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
    • G01D5/2006—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 self-induction of one or more coils
    • G01D5/2033—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 self-induction of one or more coils controlling the saturation of a magnetic circuit by means of a movable element, e.g. a magnet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/126—Rotatable input devices for instruments
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H25/00—Switches with compound movement of handle or other operating part
    • H01H25/06—Operating part movable both angularly and rectilinearly, the rectilinear movement being along the axis of angular movement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0006—Permanent magnet actuating reed switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element
    • H03K2017/9706—Inductive element
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/94057—Rotary switches
    • H03K2217/94068—Rotary switches with magnetic detection

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Switches With Compound Operations (AREA)

Abstract

The device has a housing with a housing wall (5) in which an input device (1) i.e. rotary pressure switch, is arranged. A transducer (3) comprises a bar magnet (11) arranged perpendicular to a rotational axis (A). Conductive coils (13, 15) and a magnetic field sensor are arranged within the housing or the housing wall. The coils and the sensor are provided for transforming rotational movement of the transducer around the rotational axis and/or movement of the transducer in a direction of the rotation axis into an electrical signal.

Description

Die vorliegende Erfindung betrifft ein Mess-/Schaltgerät, insbesondere ein Feldgerät, mit einer Eingabevorrichtung gemäß dem Oberbegriff des Anspruchs 1.The The present invention relates to a measuring / switching device, in particular a field device, with an input device according to the Preamble of claim 1.

In der Automatisierungstechnik werden häufig Feldgeräte eingesetzt, die zur Erfassung von Prozessvariablen dienen. Eine Vielzahl solcher Feldgeräte wird von der Firma Endress + Hauser hergestellt und vertrieben.In Automation technology is often field devices used to capture process variables. A Variety of such field devices is provided by the company Endress + Hauser manufactured and distributed.

In der Regel weisen Feldgeräte eine Anzeige- und/oder Bedieneinheit auf, die zur Darstellung der Messwerte und zur Eingabe von Benutzervorgaben dient. Hierfür sind an der Anzeige- und/oder Bedieneinheit ein Display und mehrere Bedienelemente, die als Drückschalter oder als Drehdrückschalter ausgebildet sind, vorgesehen. Drehdrückschalter erlauben eine einfache Führung durch ein auf der Anzeige dargestelltes Anwendermenü. Beispielsweise können durch Drehen des Schalters Menüpunkte des Anwendermenüs ausgewählt und durch Drücken des Schalters bestätigt werden.In As a rule, field devices have a display and / or operating unit to display the measured values and to enter user defaults serves. For this purpose are on the display and / or operating unit a display and several controls that act as a push button or designed as a rotary pushbutton, provided. Rotary push-buttons allow easy guidance by a user menu shown on the display. For example, you can turn the switch to select menu items of the user menu selected and confirmed by pressing the switch become.

Häufig sind Feldgeräte extremen Umgebungsbedingungen ausgesetzt, so dass Maßnahmen getroffen werden müssen, die verhindern, dass z. B. Wasser ins Gehäuse eindringt.Often field devices are exposed to extreme environmental conditions, so action must be taken that prevent z. B. water penetrates into the housing.

Aus DE 10 2004 001 592 A1 ist ein Drehdrückschalter bekannt, bei dem die Drehbewegung zur Betätigung eines Drehgebers und die Drückbewegung zur Betätigung eines Schalters über getrennte Übertragungselemente übertragen werden, was eine verbesserte Abdichtbarkeit des Schalters gewährleistet. Die gezeigte Konstruktion erfordert jedoch eine mechanische Verbindung zwischen dem beweglichen Drehgeber und der Auswerteelektronik, so dass Durchbrüche durch die Gehäusewand eines Geräts, an dem der Drehdrückschalter vorgesehen ist, notwendig sind. Die Abdichtung solcher Gehäusedurchbrüche ist daher immer noch relativ aufwändig.Out DE 10 2004 001 592 A1 a rotary push switch is known in which the rotational movement for actuating a rotary encoder and the pressing movement for actuating a switch are transmitted via separate transmission elements, which ensures improved sealability of the switch. However, the construction shown requires a mechanical connection between the movable shaft encoder and the evaluation so that breakthroughs through the housing wall of a device on which the rotary push switch is provided, are necessary. The sealing of such housing openings is therefore still relatively expensive.

Kapazitive Systeme, beispielsweise bekannt aus US 2007/236472 , weisen für eine Anwendung bei Feldgeräten der industriellen Messtechnik Nachteile auf, da diese Systeme beispielsweise mit Handschuhen nur schwer bedienbar sind, und somit nicht bei allen Umgebungsbedingungen eingesetzt werden können.Capacitive systems, for example, known from US 2007/236472 , have disadvantages for use in field instruments of industrial metrology, since these systems are difficult to operate, for example, with gloves, and thus can not be used in all environmental conditions.

Der Erfindung liegt die Aufgabe zugrunde, eine Eingabevorrichtung für ein Mess-/Schaltgerät anzugeben, mit dem sich das Gerät leicht bedienen lässt, wobei gleichzeitig gewährleistet ist, dass in das Gerätegehäuse kein Staub und kein Wasser eindringen kann, insbesondere dass die Anforderungen der Schutzklasse IP 65 (strahlwassergeschützt) erfüllt sind.Of the Invention is based on the object, an input device for specify a measuring / switching device with which the device easy to operate, while ensuring at the same time is that in the device housing no dust and no water can penetrate, especially that the requirements with protection class IP 65 (jet-proof).

Diese Aufgabe wird gelöst durch ein Mess-/Schaltgerät mit einem Gehäuse mit einer Gehäusewand und einer in der Gehäusewand angeordneten Eingabevorrichtung,
wobei die Eingabevorrichtung ein um eine Drehachse drehbar gelagertes Geberelement umfasst,
wobei das Geberelement zusätzlich in Richtung der Drehachse beweglich ist,
wobei das Geberelement einen im Wesentlichen entlang der Drehachse ausgerichteten ersten Stabmagneten umfasst,
und wobei das Geberelement zusätzlich einen im Wesentlichen senkrecht zur Drehachse ausgerichteten zweiten Stabmagneten umfasst,
und innerhalb des Gehäuses oder der Gehäusewand mindestens eine elektrische Leiterschleife, insbesondere eine leitfähige Spule, und/oder mindestens ein Magnetfeldsensor zur Umwandlung einer Drehbewegung des Geberelements um die Drehachse und/oder einer Bewegung des Geberelements in Richtung der Drehachse in ein elektrisches Signal, angeordnet ist.This object is achieved by a measuring / switching device having a housing with a housing wall and an input device arranged in the housing wall,
wherein the input device comprises a donor element rotatably mounted about an axis of rotation,
wherein the encoder element is additionally movable in the direction of the axis of rotation,
wherein the transmitter element comprises a first bar magnet aligned substantially along the axis of rotation,
and wherein the transmitter element additionally comprises a second bar magnet aligned substantially perpendicular to the axis of rotation,
and within the housing or the housing wall at least one electrical conductor loop, in particular a conductive coil, and / or at least one magnetic field sensor for converting a rotational movement of the encoder element about the axis of rotation and / or a movement of the encoder element in the direction of the axis of rotation is arranged in an electrical signal ,

Indem sowohl die Drehbewegung als auch eine durch Druck auf das Geberelement verursachte Bewegung entlang der Drehachse mittels einer elektrischen Leiterschleife und/oder mindestens einem Magnetfeldsensor als Übertragerelement bzw. als Übertragerelemente in ein elektrisches Signal umgewandelt werden, ist es möglich, das Geberelement vollständig mittels der Gehäusewand vom Gehäuseinneren abzutrennen, da zur Übertragung der Geberbewegung keine mechanische Verbindung zwischen dem Geberelement und den Übertragerelementen im Gehäuseinneren oder in der Gehäusewand notwendig ist. Somit kann die Gehäusewand das Gehäuseinnere vollständig gegenüber der Umgebung abschließen, ohne dass Gehäusedurchbrüche notwendig werden. Dabei ist das Geberelement außerhalb des Gehäuses und das Übertragerelement oder die Übertragerelemente innerhalb des Gehäuses angeordnet.By doing both the rotational movement and one by pressure on the donor element caused movement along the axis of rotation by means of an electric Conductor loop and / or at least one magnetic field sensor as a transformer element or as a transformer elements in an electrical signal be converted, it is possible to complete the donor element by means of the housing wall separate from the housing interior, because for the transmission of the encoder movement no mechanical Connection between the transmitter element and the transmitter elements inside the housing or in the housing wall necessary is. Thus, the housing wall, the housing interior completely close to the environment, without housing breakthroughs are necessary. The donor element is outside the housing and the transformer element or the transformer elements arranged inside the housing.

In einer Ausgestaltung sind innerhalb des Gehäuses eine erste und eine zusätzliche zweite leitfähige Spule derart angeordnet, dass die Drehbewegung und die Bewegung in Richtung der Drehachse des Geberelements als getrennte elektrische Signale abgreifbar sind. Damit erfolgt die Übertragung einer Drehbewegung bzw. einer Drückbewegung des Geberelements rein induktiv.In an embodiment are within the housing a first and an additional second conductive coil such arranged that the rotational movement and the movement in the direction of Rotary axis of the encoder element can be tapped off as separate electrical signals are. This is the transmission of a rotary motion or a pressing movement of the transmitter element purely inductive.

Durch Auftrennung der elektrischen Signale für die Drehbewegung und die axiale Bewegung des Geberelements in Richtung der Drehachse können die jeweiligen Bewegungen von einer Auswertungseinheit, welche zur Auswertung der elektrischen Primärsignale dient, einfach unterschieden werden.By separating the electrical signals for the rotational movement and the axial movement of the donor element in the direction of the axis of rotation, the respective movements of an evaluation unit, which for the evaluation of electrical Pri is used for simple signals, easy to distinguish.

In einer Weiterbildung ist das Geberelement in einer Aufnahme auf der Außenseite der Gehäusewand derart angeordnet, dass das Geberelement vollständig vom Gehäuseinneren abgetrennt ist. Somit ist auch die mechanische Aufnahme des Geberelements in der Gehäusewand derart gestaltet, dass keine Gehäusedurchbrüche notwendig werden, und eine vollständige Abgrenzung des Gehäuseinneren gegenüber der Umgebung gewährleistet ist.In a further development is the donor element in a receptacle on the Outside of the housing wall arranged such that the donor element completely from the housing interior is separated. Thus, also the mechanical recording of the donor element designed in the housing wall such that no housing breakthroughs necessary, and a complete demarcation of the Enclosed inside against the environment guaranteed is.

In einer Weiterbildung umfasst die Aufnahme für das Geberelement eine Hohlachse, in der das Geberelement lagerbar ist, und wobei die Hohlachse einen axialen Anschlag an ihrer von der Gehäusewand abgewandten Stirnseite aufweist, und wobei das Geberelement in eine ringförmige Ausnehmung zwischen dem axialen Anschlag und der Gehäusewand eingreift. Diese Ausgestaltung erhöht die Lagestabilität des Geberelements in der Aufnahme in der Gehäusewand.In a development includes the recording for the donor element a hollow shaft in which the donor element is storable, and wherein the hollow axle an axial stop on its side facing away from the housing wall End face, and wherein the donor element in an annular Recess engages between the axial stop and the housing wall. This embodiment increases the positional stability the donor element in the receptacle in the housing wall.

In einer weiteren Ausgestaltung sind entlang des axialen Anschlags umlaufend mechanische Rastelemente vorgesehen. Durch die mechanische Konstruktion der Rastung kann auf einfache Weise ein gewünschtes Bediengefühl eingestellt werden. Beispielsweise kann eine vorgegebene Anzahl von Rastungen pro Umdrehung festgelegt werden, oder der Kraftaufwand für die Drehbewegung kann nach Bedarf eingestellt werden.In a further embodiment are along the axial stop circumferentially provided mechanical locking elements. By the mechanical Construction of the detent can easily a desired Operating feeling can be adjusted. For example, a predetermined number of notches per revolution are set, or the force required for the rotational movement may be required be set.

In einer weiteren Ausgestaltung ist in der Hohlachse ein Federelement vorgesehen, das das Geberelement in axialer Richtung in einer Ausgangsposition hält. Beim Drücken des Drehdrückschalters, beispielsweise zur Bestätigung einer Menüfunktion, muss die Federkraft des Federelements überwunden werden. Wird die Kraft, mit der das Geberelement in axialer Richtung auf das Gehäuseinnere hin gedrückt wird, verringert, so führt die Federkraft der beim Drücken gespannten Feder das Geberelement wieder in die Ausgangsposition zurück. Auf diese Weise wird die Gefahr eines unbeabsichtigten Drückens verringert und die Bedienbarkeit des Drehdrückschalters erleichtert.In In another embodiment, a spring element is in the hollow axle provided that the donor element in the axial direction in an initial position holds. When pressing the rotary pushbutton, for example to confirm a menu function, the spring force must overcome the spring element. Will the power, with the donor element in the axial direction of the housing interior is pressed down, so the spring force leads the tensioned spring when pressing the donor element again back to the starting position. In this way, the Reduced risk of unintended pressing and the Operability of the rotary pushbutton facilitates.

Die Erfindung wird nun anhand eines in der Zeichnung gezeigten Ausführungsbeispiels erläutert. Es zeigen:The Invention will now be described with reference to an embodiment shown in the drawing explained. Show it:

1 eine schematische Darstellung eines Längsschnitts durch eine Eingabevorrichtung in einer ersten Ausgestaltung; 1 a schematic representation of a longitudinal section through an input device in a first embodiment;

2 eine schematische Darstellung eines Querschnitts durch die Eingabevorrichtung in einer zweiten Ausgestaltung. 2 a schematic representation of a cross section through the input device in a second embodiment.

1 zeigt eine als Drehdrückschalter ausgebildete Eingabevorrichtung 1, die an einer Gehäusewand 5 eines Gehäuses, beispielsweise einem Gehäuse für ein Schalt-/Messgerät, befestigt ist. Die Eingabevorrichtung 1 umfasst ein rotationssymmetrisches Geberelement 3 mit einer Rotationsachse A, um die das Geberelement 3 drehbar gelagert ist. 1 shows an input device designed as a rotary pushbutton switch 1 on a housing wall 5 a housing, such as a housing for a switching / measuring device, is attached. The input device 1 comprises a rotationally symmetrical transmitter element 3 with a rotation axis A around which the donor element 3 is rotatably mounted.

Das Geberelement umfasst einen sich in Richtung der Rotationsachse A erstreckenden Schaft und ein im Wesentlichen horizontal zur Drehachse sich erstreckendes Drehrad. In der Gehäusewand 5 ist eine Aufnahme in Form einer Hohlachse 7 vorgesehen. An der von der Gehäusewand 5 und dem Gehäuseinneren 19 abgewandten Stirnseite der Hohlachse 7 ist ein axialer Anschlag vorgesehen, der eine Bewegung des Geberelements 3 entlang der Drehachse A in Richtung auf das Gehäuseinnere 19 hin begrenzt. Der axiale Anschlag und die Gehäusewand 5 umschließen eine ringförmige Ausnehmung, in die ein umlaufender ringförmiger Vorsprung des Drehrads eingreift.The transmitter element comprises a shaft extending in the direction of the axis of rotation A and a rotary wheel extending substantially horizontally to the axis of rotation. In the housing wall 5 is a receptacle in the form of a hollow axle 7 intended. At the of the housing wall 5 and the housing interior 19 facing away from the hollow axle 7 an axial stop is provided, which is a movement of the donor element 3 along the axis of rotation A in the direction of the housing interior 19 limited. The axial stop and the housing wall 5 surround an annular recess into which engages a circumferential annular projection of the rotary wheel.

Umlaufend können am ringförmigen Vorsprung des Drehrads und/oder an der der Gehäusewand zugewandten Seite des axialen Anschlags der Hohlachse 7 Vorsprünge für eine mechanische Rastung (nicht dargestellt) vorgesehen werden.Circulating can on the annular projection of the rotary wheel and / or on the housing wall facing side of the axial stop of the hollow shaft 7 Projections for a mechanical detent (not shown) are provided.

Im oberen Bereich des Schafts des Geberelements 3 ist ein erster Stabmagnet 9 eingelassen, dessen Polarität entlang der Rotationsachse A des Geberelements 3 ausgerichtet ist, d. h. dass Nord- und Südpol des Stabmagneten 9 entlang der Rotationsachse A ausgerichtet sind und dass die magnetischen Feldlinien innerhalb des Stabmagneten 9 im Wesentlichen parallel zur Rotationsachse A verlaufen. Ein zweiter Stabmagnet 11 ist im unteren Bereich des Schafts eingelassen. Dieser zweite Stabmagnet 11 ist derart ausgerichtet, dass seine Polarität senkrecht zur Rotationsachse A ausgerichtet ist, d. h. dass Nord- und Südpol des Stabmagneten 11 senkrecht zur Rotationsachse A ausgerichtet sind und dass die magnetischen Feldlinien innerhalb des Stabmagneten 11 im Wesentlichen senkrecht zur Rotationsachse A verlaufen. Dabei verläuft die Rotationsachse A des Geberelements 3 durch die Mitte des zweiten Stabmagneten 11.In the upper part of the shaft of the donor element 3 is a first bar magnet 9 whose polarity along the axis of rotation A of the donor element 3 is aligned, ie that north and south pole of the bar magnet 9 aligned along the axis of rotation A and that the magnetic field lines within the bar magnet 9 run substantially parallel to the axis of rotation A. A second bar magnet 11 is embedded in the lower part of the shaft. This second bar magnet 11 is oriented so that its polarity is oriented perpendicular to the axis of rotation A, that is, the north and south pole of the bar magnet 11 are aligned perpendicular to the axis of rotation A and that the magnetic field lines within the bar magnet 11 run substantially perpendicular to the axis of rotation A. In this case, the axis of rotation A of the donor element runs 3 through the middle of the second bar magnet 11 ,

Im Gehäuseinnern 19 sind zwei Spulen 13 und 15 angeordnet. Die Wicklungen der ersten Spule 13 umgeben umlaufend einen im Bereich des ersten Stabmagneten 9 liegenden Bereich der Hohlachse 7. Bei einer Bewegung des Geberelements 3 in Richtung der Rotationsachse A auf das Gehäuseinnere 19 hin wird der Stabmagnet 9 in das Spuleninnere der Spule 13 verschoben. Dabei wird in der Spule 13 ein Strom induziert, so dass an der Spule 13 eine Induktionsspannung abgegriffen werden kann. Das Auftreten einer Induktionsspannung an der Spule 13 wird von einer Auswertungseinheit (nicht dargestellt), welche eine elektronische Auswertungsschaltung und/oder eine Datenverarbeitungseinheit umfasst, als Betätigung des Eingabeelements erkannt.Inside the case 19 are two coils 13 and 15 arranged. The windings of the first coil 13 surrounding one in the area of the first bar magnet 9 lying area of the hollow axle 7 , During a movement of the donor element 3 in the direction of the axis of rotation A on the housing interior 19 there will be the bar magnet 9 into the coil interior of the coil 13 postponed. It will be in the coil 13 induces a current, leaving at the coil 13 an induction voltage can be tapped. The occurrence of an induction voltage on the coil 13 is recognized by an evaluation unit (not shown), which comprises an electronic evaluation circuit and / or a data processing unit, as an actuation of the input element.

Die Wicklungen der zweiten Spule 15 umgeben umlaufend einen den zweiten Stabmagneten 11 umgebenden Bereich der Hohlachse 7. Bei einer Drehbewegung des Geberelements 3 um die Rotationsachse A wird in der Spule 15 ein Strom induziert, so dass an der Spule 15 eine Induktionsspannung abgegriffen werden kann. Der Betrag der Induktionsspannung hängt von der Geschwindigkeit ab, mit der das Geberelement 3 um die Rotationsachse A gedreht wird. Die Richtung der Drehbewegung bestimmt ihre Polarität. Von einer Auswertungseinheit (nicht gezeigt), welche eine elektronische Auswertungsschaltung und/oder eine Datenverarbeitungseinheit umfasst, wird die Höhe und die Polarität der Induktionsspannung ausgewertet und daraus Informationen zur Drehrichtung und Geschwindigkeit abgeleitet. Beispielsweise können diese Informationen in eine Bewegungsrichtung und eine Strecke, über die sich ein Zeiger auf einem Anwendermenü des Feldgeräts fortbewegt, umgesetzt werden.The windings of the second coil 15 encircling a second bar magnet 11 surrounding area of the hollow axle 7 , During a rotary movement of the donor element 3 about the axis of rotation A is in the coil 15 induces a current, leaving at the coil 15 an induction voltage can be tapped. The amount of induction voltage depends on the speed at which the donor element 3 is rotated about the rotation axis A. The direction of the rotation determines its polarity. From an evaluation unit (not shown), which comprises an electronic evaluation circuit and / or a data processing unit, the height and the polarity of the induction voltage is evaluated and derived therefrom information on the direction of rotation and speed. For example, this information can be converted into a direction of movement and a distance over which a pointer moves on a user menu of the field device.

Eine alternative Ausgestaltung ist in 2 schematisch dargestellt. Die Bedieneinheit ist identisch aufgebaut wie die in 1 dargestellte Bedieneinheit, jedoch sind statt der Spule 15 mehrere einzelne Spulen oder Magnetfeldsensoren 25.1, 25.2, 25.3 und 25.4 um die Hohlachse 7 herum angeordnet. Sind mehrere, d. h. mindestens zwei Spulen oder Magnetfeldsensoren um die Hohlachse 7 herum im Bereich des zweiten Stabmagneten 11 angeordnet, so können anhand der jeweils bei Drehung des Geberelements 3 von den Magnetfeldsensoren erzeugte Signale bzw. Induktionsströme bzw. Induktionsspannungen der Spulen die Orientierung des Stabmagneten ermittelt und in eine Menüposition des Anwendermenüs umgesetzt werden.An alternative embodiment is in 2 shown schematically. The operating unit has the same structure as the one in 1 shown operating unit, but instead of the coil 15 several individual coils or magnetic field sensors 25.1 . 25.2 . 25.3 and 25.4 around the hollow axle 7 arranged around. Are several, ie at least two coils or magnetic field sensors around the hollow axle 7 around in the area of the second bar magnet 11 arranged, so can on the basis of each rotation of the donor element 3 signals generated by the magnetic field sensors or induction currents or induction voltages of the coils determines the orientation of the bar magnet and be converted into a menu position of the user menu.

Um den Bedienkomfort insbesondere beim Drücken des Drehdrückschalters, also bei einer axialen Bewegung des Geberelements 3 in Richtung des Gehäuseinneren 19, zu erhöhen, ist zwischen der Gehäusewand 5 und dem axialen Schaft des Geberelements 3 ein Federelement 17 vorgesehen. Eine axiale Bewegung des Geberelements 3 entlang der Rotationsachse A muss also gegen die Federkraft des Federelements 17 durchgeführt werden.To ease of use, especially when pressing the rotary pushbutton switch, so with an axial movement of the transmitter element 3 in the direction of the housing interior 19 To raise, is between the housing wall 5 and the axial shaft of the donor element 3 a spring element 17 intended. An axial movement of the donor element 3 along the axis of rotation A must therefore against the spring force of the spring element 17 be performed.

ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • - DE 102004001592 A1 [0005] DE 102004001592 A1 [0005]
  • - US 2007/236472 [0006] - US 2007/236472 [0006]

Claims (6)

Mess-/Schaltgerät mit einem Gehäuse mit einer Gehäusewand (5) und einer in der Gehäusewand (5) angeordneten Eingabevorrichtung (1), wobei die Eingabevorrichtung (1) ein um eine Drehachse (A) drehbar gelagertes Geberelement (3) umfasst, wobei das Geberelement (3) zusätzlich in Richtung der Drehachse (A) beweglich ist, wobei das Geberelement (3) einen im Wesentlichen entlang der Drehachse (A) ausgerichteten ersten Stabmagneten (9) umfasst, dadurch gekennzeichnet, dass das Geberelement (3) zusätzlich einen im Wesentlichen senkrecht zur Drehachse (A) ausgerichteten zweiten Stabmagneten (11) umfasst, und dass innerhalb des Gehäuses oder der Gehäusewand (5) mindestens eine elektrische Leiterschleife, insbesondere eine leitfähige Spule (13, 15), und/oder mindestens ein Magnetfeldsensor zur Umwandlung einer Drehbewegung des Geberelements (3) um die Drehachse (A) und/oder einer Bewegung des Geberelements in Richtung der Drehachse (A) in ein elektrisches Signal, angeordnet ist.Measuring / switching device with a housing with a housing wall ( 5 ) and one in the housing wall ( 5 ) arranged input device ( 1 ), wherein the input device ( 1 ) a pivotable about an axis of rotation (A) mounted encoder element ( 3 ), wherein the donor element ( 3 ) is additionally movable in the direction of the axis of rotation (A), wherein the encoder element ( 3 ) a substantially along the axis of rotation (A) aligned first bar magnet ( 9 ), characterized in that the transmitter element ( 3 ) in addition to a substantially perpendicular to the axis of rotation (A) aligned second bar magnet ( 11 ) and that within the housing or the housing wall ( 5 ) at least one electrical conductor loop, in particular a conductive coil ( 13 . 15 ), and / or at least one magnetic field sensor for converting a rotational movement of the donor element ( 3 ) is arranged around the axis of rotation (A) and / or a movement of the encoder element in the direction of the axis of rotation (A) in an electrical signal. Mess-/Schaltgerät nach Anspruch 1, wobei innerhalb des Gehäuses eine erste (13) und mindestens eine zusätzliche zweite leitfähige Spule (15) derart angeordnet sind, dass die Drehbewegung und die Bewegung in Richtung der Drehachse (A) des Geberelements (3) als getrennte elektrische Signale abgreifbar sind.Measuring / switching device according to claim 1, wherein within the housing a first ( 13 ) and at least one additional second conductive coil ( 15 ) are arranged such that the rotational movement and the movement in the direction of the axis of rotation (A) of the donor element ( 3 ) can be tapped off as separate electrical signals. Mess-/Schaltgerät nach Anspruch 1 oder 2, wobei das Geberelement (3) in einer Aufnahme auf der Außenseite der Gehäusewand (5) angeordnet ist, derart dass das Geberelement vollständig vom Gehäuseinneren (19) abgetrennt ist.Measuring / switching device according to claim 1 or 2, wherein the encoder element ( 3 ) in a receptacle on the outside of the housing wall ( 5 ) is arranged such that the donor element completely from the housing interior ( 19 ) is separated. Mess-/Schaltgerät nach Anspruch 3, wobei die Aufnahme für das Geberelement (3) eine Hohlachse (7) umfasst, in der das Geberelement (3) gelagert ist, und wobei die Hohlachse (7) einen axialen Anschlag an ihrer von der Gehäusewand (5) abgewandten Stirnseite aufweist, und wobei das Geberelement (3) in eine ringförmige Ausnehmung zwischen dem axialen Anschlag und der Gehäusewand (5) eingreift.Measuring / switching device according to claim 3, wherein the receptacle for the encoder element ( 3 ) a hollow axle ( 7 ), in which the transmitter element ( 3 ), and wherein the hollow axle ( 7 ) an axial stop at its from the housing wall ( 5 ) facing away from the end face, and wherein the donor element ( 3 ) in an annular recess between the axial stop and the housing wall ( 5 ) intervenes. Mess-/Schaltgerät nach Anspruch 4, wobei entlang des axialen Anschlags umlaufend mechanische Rastelemente vorgesehen sind.Measuring / switching device according to claim 4, wherein along the axial stop circumferentially provided mechanical locking elements are. Mess-/Schaltgerät nach Anspruch 4 oder 5, wobei in der Hohlachse (7) ein Federelement (17) vorgesehen ist, das das Geberelement (3) in axialer Richtung in einer Ausgangsposition hält.Measuring / switching device according to claim 4 or 5, wherein in the hollow axle ( 7 ) a spring element ( 17 ) is provided that the donor element ( 3 ) in the axial direction in a starting position.
DE102008023651A 2008-05-15 2008-05-15 Measuring-/switching device i.e. field device, for use in automation engineering field to detect process variables, has conductive coils and magnetic field sensor for transforming rotational movement of transducer into electrical signal Ceased DE102008023651A1 (en)

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