DE102015102322B4 - Linear measuring device for a sensor arrangement and method for producing the same - Google Patents

Linear measuring device for a sensor arrangement and method for producing the same Download PDF

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DE102015102322B4
DE102015102322B4 DE102015102322.9A DE102015102322A DE102015102322B4 DE 102015102322 B4 DE102015102322 B4 DE 102015102322B4 DE 102015102322 A DE102015102322 A DE 102015102322A DE 102015102322 B4 DE102015102322 B4 DE 102015102322B4
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magnetic
metal support
magnetic element
measuring device
linear measuring
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DE102015102322A1 (en
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Andreas Wiessler
Hanspeter Thoma
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SIKO GmbH
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SIKO GmbH
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Priority to CN201620125171.1U priority patent/CN205655845U/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
    • 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
    • G01D5/244—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 characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/245—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 characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
    • G01D5/2451—Incremental encoders
    • 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
    • G01D5/244—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 characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/249—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 characteristics of pulses or pulse trains; generating pulses or pulse trains using pulse code
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0205—Magnetic circuits with PM in general
    • H01F7/0221—Mounting means for PM, supporting, coating, encapsulating PM
    • 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
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/80—Manufacturing details of magnetic targets for magnetic encoders

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

Linear-Messvorrichtung für eine Sensoranordnung aus einem Magnetelement (2) und einem Metall-Trägerelement (1), wobei das Magnetelement (2) aus einem kunststoffgebundenen hartmagnetischen Ferrit besteht, wobei das Metall-Trägerelement (1) ein Trägerband aus Stahl ist oder aus Drähten oder Gitterrosten besteht und vollständig durch das Magnetelement (2) umschlossen ist.Linear measuring device for a sensor arrangement consisting of a magnetic element (2) and a metal support element (1), the magnetic element (2) consisting of a plastic-bonded hard magnetic ferrite, the metal support element (1) being a support strip made of steel or wires or gratings and is completely enclosed by the magnetic element (2).

Description

Die Erfindung betrifft eine Linear-Messvorrichtung nach dem Oberbegriff der Patentansprüche 1 bis 3, sowie deren Verfahren zur Herstellung nach dem Patentanspruch 4.The invention relates to a linear measuring device according to the preamble of claims 1 to 3, as well as its method of production according to claim 4.

STAND DER TECHNIKSTATE OF THE ART

Aus dem Stand der Technik sind Linear-Messvorrichtungen und -systeme bekannt und gebräuchlich. Es handelt sich dabei um einen Magnetbandaufbau aus einem kunststoffgebunden hartmagnetischen Ferrit auf einem Trägerband aus Stahl, wobei das Magnetband auf das Stahlband geklebt wird und hierzu zweiseitige Klebebänder oder Kleber zur adhäsiven Verbindung der beiden Elemente zum Einsatz kommen.Linear measuring devices and systems are known and used in the prior art. It is a magnetic tape structure made of a plastic-bonded hard magnetic ferrite on a steel carrier tape, whereby the magnetic tape is glued to the steel tape and two-sided adhesive tapes or glue are used to adhesively connect the two elements.

Dazu sind folgende Druckschriften anzuführen:

  • In der JP 2009- 185 921 A wird eine Lagervorrichtung für ein Rad mit einer Rotationserkennungsvorrichtung offenbart, die für ein Kraftfahrzeug oder dergleichen verwendet wird, das mit einem Antiblockiersystem ausgestattet ist.
The following documents must be cited:
  • In the JP 2009- 185 921 A discloses a wheel bearing device with a rotation detecting device used for an automobile or the like equipped with an anti-lock braking system.

In der US 2013/0 106 406 A1 wird ein magnetischer Encoder offenbart, der die Erzeugung eines sinusförmigen magnetischen Flusses ermöglicht und die Auflösung und Interpolationsgenauigkeit verbessert.In the US 2013/0 106 406 A1 discloses a magnetic encoder that enables the generation of a sinusoidal magnetic flux and improves resolution and interpolation accuracy.

In der US 2009 / 0 274 404 A1 wird eine Radlagervorrichtung offenbart, die mit einer Raddrehzahlerfassungsvorrichtung verbunden ist, um die Drehgeschwindigkeit eines Fahrzeugrads zu erfassen.In the US 2009 / 0 274 404 A1 discloses a wheel bearing device connected to a wheel speed detection device for detecting the rotational speed of a vehicle wheel.

Schließlich ist noch die CN 1 525 177 A anzuführen, welche einen magnetischen Encoder und ein Radlager mit einem solchen Encoder offenbart. Der magnetische Encoder wird für eine Rotationserfassungseinrichtung eines relativ zueinander rotierenden Lagerteils verwendet. Beispielsweise betrifft die Erfindung einen magnetischen Encoder, der an einer Rotationsdetektionseinrichtung zur Erfassung der Rotationszahl der Vorder- und Hinterräder eines Antiblockiersystems eines Kraftfahrzeugs angeordnet ist.Finally there is this CN 1 525 177 A to be cited, which discloses a magnetic encoder and a wheel bearing with such an encoder. The magnetic encoder is used for a rotation detection device of a bearing part rotating relative to one another. For example, the invention relates to a magnetic encoder which is arranged on a rotation detection device for detecting the number of rotations of the front and rear wheels of an anti-lock braking system of a motor vehicle.

AUFGABE DER ERFINDUNGOBJECT OF THE INVENTION

Aufgabe der Erfindung ist es eine Linear-Messvorrichtung für eine Sensoranordnung zur Verfügung zu stellen, welche schnell und kostengünstig hergestellt werden kann und dabei in der Anwendung eine längere Lebensdauer aufweist.The object of the invention is to provide a linear measuring device for a sensor arrangement, which can be produced quickly and inexpensively and has a longer service life in use.

LÖSUNG DER AUFGABESOLUTION OF THE TASK

Zur Lösung der Aufgabe führen die Merkmale nach den Ansprüchen 1 bis 4.The features according to claims 1 to 4 lead to the solution of the problem.

Die erfindungsgemässe Linear-Messvorrichtung besteht in erster Linie aus einem Magnetelement in Form eines flexiblen Magnetbandes und einem Metall-Trägerelement in Form eines Trägerbandes aus Stahl. Es kommen hierbei auch andere metallene Werkstoffe in Betracht. Stahl ist in besonderer Weise geeignet. Stahl stellt die notwendige mechanische Stabilität zur Verfügung und bestimmt mit seinem Ausdehnungskoeffizienten die Ausdehnung der Linear-Messvorrichtung. Damit sind auf Stahl aufgebrachte lineare Magnetelemente bestens an die Verwendung in Maschinen aus Stahlkonstruktionen angepasst.The linear measuring device according to the invention consists primarily of a magnetic element in the form of a flexible magnetic tape and a metal carrier element in the form of a steel carrier tape. Other metal materials also come into consideration here. Steel is particularly suitable. Steel provides the necessary mechanical stability and, with its expansion coefficient, determines the expansion of the linear measuring device. This means that linear magnetic elements applied to steel are ideally suited for use in machines made of steel structures.

Ausserdem stellt ferromagnetischer Stahl den notwendigen magnetischen Rückschluss für ein Magnetsystem dar, welches aus den einzelnen Polen des Magnetelementes und eben des Metall-Trägerelementes aus Stahl gebildet wird. Dadurch sind höhere Feldstärken erreichbar, als mit dem blossen Magnetelement allein.In addition, ferromagnetic steel provides the necessary magnetic inference for a magnet system, which is formed from the individual poles of the magnetic element and the metal carrier element made of steel. This means that higher field strengths can be achieved than with just the magnetic element alone.

Denkbar und üblich sind hier auch nicht rostende Legierungen für das Metall-Trägerelement. Diese nicht-rostenden Legierungen sind gerade bei feuchten Umgebungsparametern von Vorteil für eine Langlebigkeit der Linear-Messvorrichtung. Das Magnetelement besteht in erster Linie aus einem in Kunststoff gebundenen hartmagnetischen Ferrit. Hierbei ist es unbeachtlich welche Kunststoffe zum Einsatz kommen. Der Fachmann hat hier eine grosse Auswahl an Kunststoffen in Form von Elastomeren oder Duroplasten. Die Auswahl kann an die notwendigen Anforderungen angepasst werden.Stainless steel alloys for the metal support element are also conceivable and common here. These non-rusting alloys are particularly advantageous in humid environmental parameters for the longevity of the linear measuring device. The magnetic element consists primarily of a hard magnetic ferrite bound in plastic. It is irrelevant which plastics are used. The specialist has a large selection of plastics in the form of elastomers or thermosets. The selection can be adapted to the necessary requirements.

In einem bevorzugten Ausführungsbeispiel ist das Magnetelement und das Metall-Trägerelement einstückig extrudiert. In einem anderen Ausführungsbeispiel ist wird zunächst das Metall-Trägerelement hergestellt und dann auf das Metall-Trägerelement das Magnetelement aufvulkanisiert.In a preferred embodiment, the magnetic element and the metal support element are extruded in one piece. In another exemplary embodiment, the metal support element is first produced and then the magnetic element is vulcanized onto the metal support element.

Bei allen beanspruchten Ausführungsbeispielen ist das Metall-Trägerelement durch das Magnetelement komplett umschlossen. Auf diese Weise kann ebenfalls der Schutz vor Rost gewährleistet werden.In all claimed embodiments, the metal support element is completely enclosed by the magnetic element. In this way, protection against rust can also be guaranteed.

Somit ist das Metall-Trägerelement vollständig durch das Magnetelement umschlossen.The metal support element is therefore completely enclosed by the magnetic element.

Das Metall-Trägerelement kann bspw. aber auch in Form von Drähten oder Gitterrosten ausgebildet sein, welche dann ganz von dem Magnetelement umschlossen sind.The metal support element can, for example, also be designed in the form of wires or gratings, which are then completely enclosed by the magnetic element.

Die beschriebene Sensoranordnung ist in der Regel ein Inkremental- und/oder Absolut-Mess-System. Dabei verfährt ein Messsystem in Form eines Sensors entlang eines Linear-Messmaßstabes und nimmt dabei die Magnetfelder des Magnetelementes auf und registriert die aufgenommenen Daten und berechnet hieraus die Position, Verfahrrichtung sowie relative Geschwindigkeit zwischen Messsystem und Linear-Messmaßstab.The sensor arrangement described is usually an incremental and/or absolute measuring system. A measuring system in the form of a sensor moves along a linear measuring scale and records the magnetic fields of the magnetic element and registers the recorded data and uses this to calculate the position, direction of travel and relative speed between the measuring system and the linear measuring scale.

FIGURENBESCHREIBUNGFIGURE DESCRIPTION

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung der Figuren. Diese zeigen in

  • 1 eine Teilansicht eines Gegenstands aus dem Stand der Technik;
  • 2 eine Teilansicht eines weiteren Gegenstands aus dem Stand der Technik;
  • 3 eine Teilansicht eines erfindungsgemässen Ausführungsbeispiels;
  • 4 eine Teilansicht eines weiteren erfindungsgemässen Ausführungsbeispiels.
Further advantages, features and details of the invention emerge from the following description of the figures. These show in
  • 1 a partial view of an item from the prior art;
  • 2 a partial view of another prior art item;
  • 3 a partial view of an exemplary embodiment according to the invention;
  • 4 a partial view of a further exemplary embodiment according to the invention.

In der 1 ist auf ein Metall-Trägerelement 1 ein Magnetelement 2 aufvulkanisiert. Das Magnetelement 2 besteht hierbei aus einem kunststoffgebundenen hartmagnetischen Ferrit. Es wird auf das Metall-Trägerelement 1 in Form eines Metall-Trägerbandes aufvulkanisiert. Es ist auch denkbar, dass das Metall-Trägerelement 1 gemeinsam mit dem Magnetelement 2 einstückig extrudiert ist.In the 1 A magnetic element 2 is vulcanized onto a metal support element 1. The magnetic element 2 consists of a plastic-bonded hard magnetic ferrite. It is vulcanized onto the metal carrier element 1 in the form of a metal carrier tape. It is also conceivable that the metal support element 1 is extruded in one piece together with the magnetic element 2.

Daneben ist es aber auch von der Erfindung vorgesehen, dass das Magnetelement 2 auf das Metall-Trägerelement 1 aufextrudiert ist bzw. wird. Das Metall-Trägerelement 1 ist hierbei auf der dem Magnetelement 2 zugewandten Seite komplett von dem Magnetelement 2 bedeckt ist.In addition, the invention also provides that the magnetic element 2 is or is extruded onto the metal support element 1. The metal support element 1 is completely covered by the magnetic element 2 on the side facing the magnetic element 2.

2 zeigt ein weiteres nicht beanspruchtes Ausführungsbeispiel, wobei hier das Metall-Trägerelement 1 nicht komplett von dem Magnetelement 2 bedeckt ist. Ein jeweils freibleibender Steg 3, 4 unterscheidet das Ausführungsbeispiel nach 2 von dem Ausführungsbeispiel nach 1. 2 shows a further unclaimed exemplary embodiment, in which case the metal support element 1 is not completely covered by the magnetic element 2. A free web 3, 4 differentiates the exemplary embodiment 2 from the exemplary embodiment 1 .

In 3 ist wiederum das Metall-Trägerelement 1 komplett von dem Magnetelement 2 umschlossen.In 3 the metal support element 1 is in turn completely enclosed by the magnetic element 2.

4 zeigt ein Ausführungsbeispiel, bei dem das Metall-Trägerelement 1 in Form von Drähten komplett von dem Magnetelement 2 umschlossen ist. Dabei sind die Metall-Trägerelemente 2 in Form von Drähten in dem Magnetelement 2 in etwa mitttig angeordnet. 4 shows an exemplary embodiment in which the metal support element 1 is completely enclosed by the magnetic element 2 in the form of wires. The metal support elements 2 in the form of wires are arranged approximately centrally in the magnetic element 2.

POSITIONSZAHLENLISTEPOSITION NUMBER LIST

11
Metall-TrägerelementMetal support element
22
MagnetelementMagnetic element
33
Stegweb
44
Stegweb

Claims (4)

Linear-Messvorrichtung für eine Sensoranordnung aus einem Magnetelement (2) und einem Metall-Trägerelement (1), wobei das Magnetelement (2) aus einem kunststoffgebundenen hartmagnetischen Ferrit besteht, wobei das Metall-Trägerelement (1) ein Trägerband aus Stahl ist oder aus Drähten oder Gitterrosten besteht und vollständig durch das Magnetelement (2) umschlossen ist.Linear measuring device for a sensor arrangement consisting of a magnetic element (2) and a metal support element (1), the magnetic element (2) consisting of a plastic-bonded hard magnetic ferrite, the metal support element (1) being a support strip made of steel or wires or gratings and is completely enclosed by the magnetic element (2). Linear-Messvorrichtung für eine Sensoranordnung nach Anspruch 1, dadurch gekennzeichnet, dass das Magnetelement (2) auf das Metall-Trägerelement (1) vulkanisiert ist.Linear measuring device for a sensor arrangement Claim 1 , characterized in that the magnetic element (2) is vulcanized onto the metal support element (1). Linear-Messvorrichtung für eine Sensoranordnung nach Anspruch 1, dadurch gekennzeichnet, dass das Magnetelement (2) und das Metall-Trägerelement (1) einstückig extrudiert ist.Linear measuring device for a sensor arrangement Claim 1 , characterized in that the magnetic element (2) and the metal support element (1) are extruded in one piece. Verfahren zur Herstellung einer Linear-Messvorrichtung für eine Sensoranordnung aus einem Magnetelement (2) und einem Metall-Trägerelement (1), wobei das Magnetelement (2) aus einem kunststoffgebundenen hartmagnetischen Ferrit besteht, dadurch gekennzeichnet, dass das Magnetelement (2) einstückig mit dem Metall-Trägerelement (1) extrudiert wird, wobei das Magnetelement (2) das Metall-Trägerelement (1) vollständig umschliesst.Method for producing a linear measuring device for a sensor arrangement consisting of a magnetic element (2) and a metal support element (1), the magnetic element (2) consisting of a plastic-bonded hard magnetic ferrite, characterized in that the magnetic element (2) is integral with the Metal support element (1) is extruded, the magnetic element (2) completely enclosing the metal support element (1).
DE102015102322.9A 2015-02-18 2015-02-18 Linear measuring device for a sensor arrangement and method for producing the same Active DE102015102322B4 (en)

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DE102015102322.9A DE102015102322B4 (en) 2015-02-18 2015-02-18 Linear measuring device for a sensor arrangement and method for producing the same
CN201620125171.1U CN205655845U (en) 2015-02-18 2016-02-17 A linear measuring device for sensor arranges

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Publication number Priority date Publication date Assignee Title
DE102017117030A1 (en) 2017-07-27 2019-01-31 Siko Gmbh Linear measuring device
DE102019114688A1 (en) * 2019-05-31 2020-12-03 Bundesrepublik Deutschland, Vertreten Durch Das Bundesministerium Für Wirtschaft Und Energie, Dieses Vertreten Durch Den Präsidenten Der Physikalisch-Technischen Bundesanstalt Method of manufacturing a magnetic scale and magnetic scale

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1525177A (en) 2003-02-25 2004-09-01 Ntn��ʽ���� Magnetic encoder and wheel support bearing assembly using the same
JP2009185921A (en) 2008-02-07 2009-08-20 Ntn Corp Wheel bearing device with rotation detector
US20090274404A1 (en) 2007-01-17 2009-11-05 Ntn Corporation Wheel Bearing Apparatus Incorporated With A Wheel Speed Detecting Apparatus
US20130106406A1 (en) 2011-10-28 2013-05-02 Sanyo Denki Co., Ltd. Magnetic encoder with improved resolution

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1525177A (en) 2003-02-25 2004-09-01 Ntn��ʽ���� Magnetic encoder and wheel support bearing assembly using the same
US20090274404A1 (en) 2007-01-17 2009-11-05 Ntn Corporation Wheel Bearing Apparatus Incorporated With A Wheel Speed Detecting Apparatus
JP2009185921A (en) 2008-02-07 2009-08-20 Ntn Corp Wheel bearing device with rotation detector
US20130106406A1 (en) 2011-10-28 2013-05-02 Sanyo Denki Co., Ltd. Magnetic encoder with improved resolution

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DE102015102322A1 (en) 2016-08-18

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