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DE102008012923A1 - Inductive angle sensor for use in motor vehicle for determining position of actuators, has control- and evaluation unit, and conductor structure exhibiting layer within outer contour area and filled with casting material - Google Patents

Inductive angle sensor for use in motor vehicle for determining position of actuators, has control- and evaluation unit, and conductor structure exhibiting layer within outer contour area and filled with casting material Download PDF

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Publication number
DE102008012923A1
DE102008012923A1 DE102008012923A DE102008012923A DE102008012923A1 DE 102008012923 A1 DE102008012923 A1 DE 102008012923A1 DE 102008012923 A DE102008012923 A DE 102008012923A DE 102008012923 A DE102008012923 A DE 102008012923A DE 102008012923 A1 DE102008012923 A1 DE 102008012923A1
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DE
Germany
Prior art keywords
conductor structure
outer contour
angle sensor
evaluation unit
filled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE102008012923A
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German (de)
Inventor
Thomas Elpermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hella GmbH and Co KGaA
Original Assignee
Hella KGaA Huek and Co
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Priority to DE102008012923A priority Critical patent/DE102008012923A1/en
Publication of DE102008012923A1 publication Critical patent/DE102008012923A1/en
Pending 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
    • G01D5/22—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 differentially influencing two coils
    • G01D5/225—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 differentially influencing two coils by influencing the mutual induction between the two coils
    • 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
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/24—Housings ; Casings for instruments

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

The sensor has a stator provided in a planer arrangement and with an exciter element and a reception coil, and a rotor with which a conductor structure (6) is arranged on a carrier e.g. circular disk. An electronic control- and evaluation unit, and the conductor structure exhibits a layer (8) within an outer contour area and filled with casting material. The layer distributed over the outer contour corresponds to blades (7) of the conductor structure, where the layer is limited in its breadth and exhibits a round cross section.

Description

Die Erfindung betrifft einen induktiven Winkelsensor gemäß dem Oberbegriff des Anspruchs 1.The The invention relates to an inductive angle sensor according to the Preamble of claim 1.

Solche Sensoren werden z. B. in Kraftfahrzeugen eingesetzt, um die Position von Stellgliedern zu bestimmen. Sie sind planar aufgebaut, wobei ein Stator auf einer Leiterkarte mit Erreger- und Empfängerspulen ausgebildet ist. Ein Rotor ist ober- und/oder unterhalb des Stators angeordnet. Eine Auswerteschaltung erlaubt die Ausgabe entsprechender Signale für die Winkelstellung.Such Sensors are z. B. used in motor vehicles to the position of actuators to determine. They are planar, with a stator on a printed circuit board with exciter and receiver coils is trained. A rotor is above and / or below the stator arranged. An evaluation circuit allows the output of appropriate Signals for the angular position.

Aus der DE 10 2004 027 954 A1 ist ein induktiver Winkelsensor bekannt, der einen Stator und zwei Rotoren umfasst. Die Rotoren sind beabstandet auf einem Torsionselement angeordnet. Hierdurch kann ein Torsionswinkel eines drehbaren tordierenden Elements gemessen werden.From the DE 10 2004 027 954 A1 For example, an inductive angle sensor is known which comprises a stator and two rotors. The rotors are spaced apart on a torsion element. As a result, a torsion angle of a rotatable twisting element can be measured.

Die DE 101 56 238 A1 beschreibt einen induktiven Winkelsensor mit Erreger- und Empfängerspulen sowie mit zwei Koppelelementen (Statoren) unterschiedlicher Periodizität. Der Sensor weist entsprechend zwei Empfangsgeometrien unterschiedlicher Periodizität auf. Die Koppelelemente sind elektrisch und mechanisch miteinander verbunden.The DE 101 56 238 A1 describes an inductive angle sensor with excitation and receiver coils and with two coupling elements (stators) of different periodicity. The sensor accordingly has two reception geometries of different periodicity. The coupling elements are electrically and mechanically connected to each other.

Viele der Rotoren weisen eine Leiterstruktur aus Metall auf, die an einem Träger so befestigt ist, dass sie an einer Oberfläche des Trägers einem Stator gegenüber liegt. Die Leiterstruktur muss entsprechend an dem Träger befestigt sein. Hierfür sind verschiedene Befestigungsarten allgemein bekannt:
Es ist bekannt, die Leiterstruktur an dem Träger festzukleben. Dies hat den Nachteil einer aufwändigen Montage und teurer Klebstoffe, die eine dauerhafte Verbindung gewährleisten.Many of the rotors have a metal conductor structure attached to a carrier so as to face a stator on a surface of the carrier. The conductor structure must be attached to the carrier accordingly. For this purpose, various types of fastening are well known:
It is known to glue the conductor structure to the carrier. This has the disadvantage of a complex assembly and expensive adhesives that ensure a permanent connection.

Niete oder Laschen als Befestigungsmittel beeinflussen die Messung des Sensors.rivet or tabs as fasteners affect the measurement of Sensor.

Aufgabe der Erfindung ist es, Winkelsensoren zu schaffen, bei denen die Leiterstruktur einfach und sicher auf dem Träger befestigt ist.task The invention is to provide angle sensors in which the Ladder structure easily and securely attached to the carrier is.

Die Aufgabe ist durch die Merkmale des Anspruchs 1 gelöst. Dadurch dass die Leiterstruktur mindestens eine Stufe aufweist, kann sie zusammen mit der Herstellung des Trägers durch Spritzgießen befestigt werden. Hierbei werden die Seiten der Leiterstruktur umschlossen und gleichzeitig die Stufe mit dem Gussmaterial gefüllt. Auf diese Weise ist eine sichere Befestigung der Leiterstruktur an dem Träger gewährleistet. Eine Störung des Sensorsignals durch die Befestigung ist ausgeschlossen.The The object is solved by the features of claim 1. Because the conductor structure has at least one stage, she can go through with the manufacture of the carrier Be attached by injection molding. Here are the pages the ladder structure and at the same time the level with the Casting material filled. This way is a safe Secured attachment of the conductor structure to the carrier. A disturbance of the sensor signal by the attachment is locked out.

Die Unteransprüche betreffen die vorteilhafte Ausgestaltung der Erfindung.The Subclaims relate to the advantageous embodiment the invention.

Die Anzahl der über die Außenkontur verteilten Stufen stimmt mit der Anzahl von Flügeln der Leiterstruktur überein, wobei die Stufen in ihrer Breite begrenzt sind. Dies gewährleistet eine gleichmäßige Befestigung und daher eine hohe Stabilität.The Number of steps distributed over the outer contour is consistent with the number of vanes of the ladder structure the steps are limited in their width. This ensures a uniform attachment and therefore a high Stability.

Ein gerundeter Querschnitt der Stufe verhindert die Bildung von Lufteinschlüsssen und somit von Schwachstellen der Befestigung.One Rounded cross section of the step prevents the formation of Lufteinschlüsssen and thus of weak points of attachment.

Anhand der beigefügten schematischen Zeichnungen wird die Erfindung nachfolgend näher erläutert. Dabei zeigt:Based The accompanying schematic drawings illustrate the invention explained in more detail below. Showing:

1 eine perspektivische Ansicht eines induktiven Winkelsensors, 1 a perspective view of an inductive angle sensor,

2 einen Rotor als Detail (perspektivisch) und 2 a rotor as a detail (in perspective) and

3 eine Leiterstruktur als Detail (perspektivisch). 3 a ladder structure as a detail (in perspective).

Wie aus der 1 ersichtlich umfasst ein induktiver Winkelsensor eine Leiterplatte 1, auf der ein Erregerelement, eine Vielzahl von Empfangsspulen und eine elektronische Steuer- und Auswerteeinrichtung 4 angeordnet sind. Die Komponenten auf der Leiter platte 1 sind entsprechend den Erfordernissen elektrisch verbunden. Weiterhin ist der Leiterplatte 1 in vorbestimmtem Abstand und parallel zu dem Erregerelement ein Rotor 3 zugeordnet. Das Erregerelement und die Empfangsspulen werden insgesamt auch als Stator 2 bezeichnet.Like from the 1 As can be seen, an inductive angle sensor comprises a printed circuit board 1 on which an excitation element, a plurality of receiving coils and an electronic control and evaluation device 4 are arranged. The components on the circuit board 1 are electrically connected according to the requirements. Furthermore, the circuit board 1 at a predetermined distance and parallel to the excitation element, a rotor 3 assigned. The exciter element and the receiver coils are also altogether as a stator 2 designated.

Wie aus den 2 ersichtlich umfasst der Rotor 3 einen Träger 5 aus elektrisch nicht leitendem Material, auf dessen Stirnseite eine Leiterstruktur 6 in Form eines endlosen Bandes angeordnet ist. Der Träger 5 ist z. B. als Stempel mit kreisförmigem Querschnitt oder als Kreisscheibe ausgebildet.Like from the 2 obviously, the rotor comprises 3 a carrier 5 made of electrically non-conductive material, on its front side a conductor structure 6 is arranged in the form of an endless belt. The carrier 5 is z. B. formed as a stamp with a circular cross-section or as a circular disk.

Die Leiterstruktur 6, die in der 3 ohne Träger dargestellt ist, ist an sich bekannt und weist in der Draufsicht die Kontur eines Propellers mit hier drei Flügeln 7 auf. Die Leiterstruktur 6 ist z. B. aus einer runden Blechscheibe aus Metall gestanzt, indem innen ein zentrischer kreisförmiger Teil und drei daran anschließende, gleichmäßig beabstandete Kreisringsegmente sowie außen zwischen zwei benachbarten dieser Kreisringsegmente sich nach außen weitende Aussparungen ausgenommen sind. Auf diese Weise liegt die Leiterstruktur 6 in unterschiedlicher Breite vor.The ladder structure 6 in the 3 is shown without support, is known per se and has in plan view the contour of a propeller with three wings here 7 on. The ladder structure 6 is z. B. punched from a round metal sheet metal by inside a centric circular part and three adjoining, evenly spaced circular ring segments and outside between two adjacent of these circular ring segments are recessed outwardly flared recesses. In this way lies the ladder structure 6 in different widths.

Im Bereich der Außenkontur der Leiterstruktur 6 sind in eine, gemäß der 3 obere, Hauptfläche Stufen 8 so eingelassen, dass sie zu der Außenkontur hin offen sind. Die Stufen 8 haben in der Draufsicht einen halbreisförmigen Querschnitt, der sich leicht vom Grund zu der Hauptfläche hin erweitert. Hierdurch sind die Stufen 8 in ihrer Breite begrenzt. Die Stufen 8 sind mittig zwischen zwei benachbarten Flügeln 7 angeordnet, so dass im dargestellten Beispiel drei Stufen 8 vorhanden sind.In the area of the outer contour of the ladder structure 6 are in one, according to the 3 upper, main surface steps 8th so embedded that they are open to the outer contour. The steps 8th have in plan view a semi-circular cross section, which is slightly extended from the bottom to the main surface. This is the stages 8th limited in width. The steps 8th are centered between two adjacent wings 7 arranged so that in the example shown three stages 8th available.

Die Leiterplatte 1 und der Rotor 3 sind so zueinander angeordnet, dass sich der Rotor 2 und die Leiterstruktur 6 des Rotors 3 gegenüber liegen.The circuit board 1 and the rotor 3 are arranged to each other so that the rotor 2 and the ladder structure 6 of the rotor 3 lie opposite.

Zur Herstellung des Rotors 3 wird die Leiterstruktur 6 in eine entsprechende Spritzform so eingelegt, dass die Stufen 8 nach außen zu der Stirnseite des Rotors 3 weisen. Das Material des Trägers 5 wird in die Spritzform gefüllt und die Leiterstruktur 6 mit Ausnahme der der Stirnseite zugeordneten Oberfläche von dem Material um schlossen. Hierbei gelangt das Material auch in die Stufen 8, so dass bei dem fertigen Rotor 3 ein sicherer Halt zwischen dem Träger 3 und der Leiterstruktur 6 entsteht.For the production of the rotor 3 becomes the ladder structure 6 placed in an appropriate mold so that the steps 8th outwards to the front of the rotor 3 point. The material of the carrier 5 is filled into the mold and the conductor structure 6 with the exception of the front side associated surface of the material to closed. In this case, the material also reaches the steps 8th so that in the finished rotor 3 a secure hold between the wearer 3 and the ladder structure 6 arises.

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 102004027954 A1 [0003] DE 102004027954 A1 [0003]
  • - DE 10156238 A1 [0004] - DE 10156238 A1 [0004]

Claims (3)

Induktiver Winkelsensor mit einem Stator (2) in planer Anordnung, der mindestens ein Erregerelement und mindestens ein Empfangselement umfasst, mit einem Rotor (3), bei dem eine Leiterstruktur (6) auf einem Träger (5) angeordnet ist, und mit einer Steuer- und Auswerteeinheit (4), dadurch gekennzeichnet, dass die Leiterstruktur (6) im Bereich ihrer Außenkontur mindestens eine Stufe (8) aufweist.Inductive angle sensor with a stator ( 2 ) in a planar arrangement, which comprises at least one excitation element and at least one receiving element, with a rotor ( 3 ), in which a ladder structure ( 6 ) on a support ( 5 ) is arranged, and with a control and evaluation unit ( 4 ), characterized in that the conductor structure ( 6 ) in the region of its outer contour at least one step ( 8th ) having. Induktiver Winkelsensor nach Anspruch 1, dadurch gekennzeichnet, dass die Anzahl der über die Außenkontur verteilten Stufen (8) der Anzahl von Flügeln (7) der Leiterstruktur (6) entspricht, wobei die Stufen (8) in ihrer Breite begrenzt sind.Inductive angle sensor according to claim 1, characterized in that the number of distributed over the outer contour stages ( 8th ) the number of wings ( 7 ) of the ladder structure ( 6 ), the stages ( 8th ) are limited in their width. Induktiver Winkelsensor nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Stufe (8) einen gerundeten Querschnitt aufweist.Inductive angle sensor according to claim 1 or 2, characterized in that the stage ( 8th ) has a rounded cross-section.
DE102008012923A 2008-03-06 2008-03-06 Inductive angle sensor for use in motor vehicle for determining position of actuators, has control- and evaluation unit, and conductor structure exhibiting layer within outer contour area and filled with casting material Pending DE102008012923A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102008012923A DE102008012923A1 (en) 2008-03-06 2008-03-06 Inductive angle sensor for use in motor vehicle for determining position of actuators, has control- and evaluation unit, and conductor structure exhibiting layer within outer contour area and filled with casting material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008012923A DE102008012923A1 (en) 2008-03-06 2008-03-06 Inductive angle sensor for use in motor vehicle for determining position of actuators, has control- and evaluation unit, and conductor structure exhibiting layer within outer contour area and filled with casting material

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DE102008012923A1 true DE102008012923A1 (en) 2009-09-10

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DE102008012923A Pending DE102008012923A1 (en) 2008-03-06 2008-03-06 Inductive angle sensor for use in motor vehicle for determining position of actuators, has control- and evaluation unit, and conductor structure exhibiting layer within outer contour area and filled with casting material

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018102094A1 (en) * 2018-01-31 2019-08-01 Thyssenkrupp Ag Inductive angle sensor for a motor vehicle steering
DE102022103734A1 (en) 2022-02-17 2023-08-17 HELLA GmbH & Co. KGaA Conductor track structure, rotor, rotation angle sensor unit and method for producing a rotor for a rotation angle sensor unit
DE102022214231A1 (en) 2022-12-21 2024-06-27 Swoboda Schorndorf KG Sensor wheel for an inductive angle sensor, inductive angle sensor with such a sensor wheel and system with an inductive angle sensor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738836A1 (en) * 1997-09-05 1999-03-11 Hella Kg Hueck & Co Inductive angle sensor
DE10156238A1 (en) 2001-11-15 2003-06-05 Hella Kg Hueck & Co Patente Ma Inductive angle sensor, especially for a motor vehicle
US20050247140A1 (en) * 2002-09-17 2005-11-10 Fumihiko Abe Rotation sensor
DE102004027954A1 (en) 2004-06-08 2005-12-29 Hella Kgaa Hueck & Co. Inductive angle measurement sensor, e.g. for measuring the torsion angle of a steering column, has inductively coupled rotors mounted at a distance from each other on a torsion bar

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738836A1 (en) * 1997-09-05 1999-03-11 Hella Kg Hueck & Co Inductive angle sensor
DE10156238A1 (en) 2001-11-15 2003-06-05 Hella Kg Hueck & Co Patente Ma Inductive angle sensor, especially for a motor vehicle
US20050247140A1 (en) * 2002-09-17 2005-11-10 Fumihiko Abe Rotation sensor
DE102004027954A1 (en) 2004-06-08 2005-12-29 Hella Kgaa Hueck & Co. Inductive angle measurement sensor, e.g. for measuring the torsion angle of a steering column, has inductively coupled rotors mounted at a distance from each other on a torsion bar

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018102094A1 (en) * 2018-01-31 2019-08-01 Thyssenkrupp Ag Inductive angle sensor for a motor vehicle steering
DE102022103734A1 (en) 2022-02-17 2023-08-17 HELLA GmbH & Co. KGaA Conductor track structure, rotor, rotation angle sensor unit and method for producing a rotor for a rotation angle sensor unit
DE102022214231A1 (en) 2022-12-21 2024-06-27 Swoboda Schorndorf KG Sensor wheel for an inductive angle sensor, inductive angle sensor with such a sensor wheel and system with an inductive angle sensor
DE102022214231B4 (en) 2022-12-21 2024-11-14 Swoboda Schorndorf KG Sensor wheel for an inductive angle sensor, inductive angle sensor with such a sensor wheel and system with an inductive angle sensor

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