WO2020216389A1 - Measuring system - Google Patents

Measuring system Download PDF

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Publication number
WO2020216389A1
WO2020216389A1 PCT/DE2020/100146 DE2020100146W WO2020216389A1 WO 2020216389 A1 WO2020216389 A1 WO 2020216389A1 DE 2020100146 W DE2020100146 W DE 2020100146W WO 2020216389 A1 WO2020216389 A1 WO 2020216389A1
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WO
WIPO (PCT)
Prior art keywords
measuring system
permeability
component
movement
stainless steel
Prior art date
Application number
PCT/DE2020/100146
Other languages
German (de)
French (fr)
Inventor
Florian ZELLER
Original Assignee
Schaeffler Technologies AG & Co. KG
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.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Priority to KR1020217028805A priority Critical patent/KR20220005433A/en
Priority to CN202080017550.8A priority patent/CN113508278A/en
Publication of WO2020216389A1 publication Critical patent/WO2020216389A1/en

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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
    • G01D5/142—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
    • G01D5/147—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 movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
    • F16D2025/081—Hydraulic devices that initiate movement of pistons in slave cylinders for actuating clutches, i.e. master cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/18—Sensors; Details or arrangements thereof
    • 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
    • G01D2205/20—Detecting rotary movement
    • G01D2205/28—The target being driven in rotation by additional gears

Definitions

  • the invention relates to a measuring system, comprising a magnetic field-dependent sensor, which is arranged opposite this to detect a state or a movement of a movably mounted component, the movably mounted component carrying a permeability and a device for determining a position of an actuator in a hydrostatic Actuator system according to the preamble of claim 9.
  • a sensor system and a piston-cylinder arrangement are known from DE 10 2012 219 173 A1.
  • the sensor system comprises a switching point sensor which is mounted opposite a magnet, the magnet passing through the switching point sensor being mechanically attached to a linearly movable element. Since magnetic materials are very expensive, they add to the cost of the sensor system.
  • the invention is based on the object of specifying a measuring system that is robust and yet can be manufactured inexpensively.
  • the object is achieved in that the movably mounted component consists at least partially of stainless steel, with at least one area with a predetermined permeability being integrated in the stainless steel in the direction of movement of the component.
  • permeability should be understood to mean the permeability to magnetic fields.
  • a plurality of areas arranged at a distance from one another and having the same permeability extend in the stainless steel.
  • a plurality of regions with different permeability which are arranged at a distance from one another, extend in the stainless steel in the direction of movement of the component. Areas with different permeability increase the accuracy of the position detection of the component.
  • the areas with permeability have different sizes and / or shapes. This refines the position or state detection.
  • the permeability is designed as a structure in the area.
  • the magnetic field-dependent sensor lies directly opposite the movably mounted component and carries a back bias magnet on a side facing away from the component. This back-bias magnet sets a preload on the sensor, which increases the sensor signal, which makes it easier to evaluate.
  • the permeability of the areas is realized by a ferromagnetic material.
  • Ferromagnetism is the most common type of magnetism, so such materials are inexpensive to use.
  • the component is mounted so that it can move linearly or in a rotational manner, the sensor detecting a linear change in position or a change in angle.
  • This measuring system can therefore be used in a variety of ways.
  • a further development of the invention relates to a device for determining a position of an actuator in a hydrostatic actuator system, preferably a clutch actuation system in a vehicle, in which an electric motor for conveying a hydraulic fluid in a piston unit of the actuator system is used to determine a rotor shaft for cooperation with a measuring system having an angular position of the rotor shaft.
  • the measurement system is designed according to at least one of the features described in this application for property rights.
  • the rotor shaft is advantageously designed as a can which has a plurality of areas with the same and / or different permeability in the direction of movement. Such a robust and inexpensive motor shaft can be easily manufactured in series production and requires less installation space, so that the device comprising the motor shaft can be reduced in size.
  • FIG. 3 exemplary embodiments of a movably mounted component according to FIG. 1.
  • FIG. 1 an embodiment of a device according to the invention is shown in the form of a hydraulic actuator 1 for performing the method according to the invention.
  • the hydraulic clutch actuator 1 includes a control unit 2 which controls an electric motor for actuating the clutch actuator 1.
  • the control device 2 is designed as a module which is connected to a hydraulic module 3.
  • a spindle 4 can be moved on both sides along an axial actuator path.
  • the spindle 4 is driven by the electric motor, which has a stator 5.
  • a rotor shaft 6 is mounted radially inside the stator 5 and is in engagement with the spindle 4 via a planetary roller gear (not shown).
  • the rotor shaft is made of stainless steel and has several magnetic areas 10 in the direction of rotation.
  • the planetary roller gear is encased in a sleeve 7.
  • a pressure piece 8 is attached, which acts on an element of a hydraulic path, not shown, such as a master cylinder. Between the pressure piece 8 and the hydraulic module 3 he stretches a bellows 11, which protects the actuator 1 from contamination.
  • the electric motor is activated commutated.
  • the rotational movement of the rotor shaft 6 must be recorded. This is done by a measuring system 12, as shown in FIG. 2.
  • the rotor shaft 6 is made of stainless steel with a predetermined permeability m1.
  • the areas 10 are provided with a ferromagnetic material at equal intervals rial integrated.
  • a Hall sensor 13 is arranged opposite these areas 10 and has a back-bias magnet 14 on its side facing away from the rotor shaft 6. By means of this back-bias magnet 14, the signal from the Hall sensor 13 is magnetically tensioned so that local differences in the magnetism can be reliably detected when the rotor shaft 6 moves past the Hall sensor 13.
  • FIG. 3 different configurations of the ferromagnetic areas 10 are shown, which can be integrated in the rotor shaft 6 made of stainless steel.
  • 3a shows a top view of the rotor shaft 6, which has regions 10 which are evenly spaced from one another and have the same permeability m2, which differs from the permeability m1 of the stainless steel.
  • Fig. 3b rectangular areas 10, 15, 16 are shown which have different Permeabilitä th.
  • the area 15 has the permeability m3
  • the area 16 has a permeability m4.
  • the areas 10, 15, 16 can also have different widths.
  • the ferromagnetic areas can have structures with different ferromagnetic properties. These ferromagnetic properties can be realized by the structure of a square 17 or a circle 18 or a triangle 19 or a semicircle 20 or the like (Fig. 3c).
  • the solution described is not limited to an angle detection with a rotor position sensor, but can also be used for linear motion detection.

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

Abstract

The invention relates to a measuring system comprising a magnetic field-dependent sensor arranged opposite a movably mounted component (6) for detecting a state or a movement of same, wherein the movably mounted component (6) has a permeability. In a measuring system which is of simple and robust design, the movably mounted component (6) consists at least partially of stainless steel, wherein at least one region (10, 15, 16) of a defined permeability is integrated in the stainless steel in the direction of movement of the component (6).

Description

Messsystem Measuring system
Die Erfindung betrifft ein Messystem, umfassend einen magnetfeldabhängigen Sensor, der zur Erfassung eines Zustandes oder einer Bewegung eines beweglich gelagerten Bauelemen tes diesem gegenüberliegend angeordnet ist, wobei das beweglich gelagerte Bauelement ei ne Permeabilität trägt sowie eine Vorrichtung zur Bestimmung einer Position eines Aktors in einem hydrostatischen Aktorsystem gemäß dem Oberbegriff von Anspruch 9. The invention relates to a measuring system, comprising a magnetic field-dependent sensor, which is arranged opposite this to detect a state or a movement of a movably mounted component, the movably mounted component carrying a permeability and a device for determining a position of an actuator in a hydrostatic Actuator system according to the preamble of claim 9.
Aus der DE 10 2012 219 173 A1 sind ein Sensorsystem und eine Kolben-Zylinder-Anordnung bekannt. Das Sensorsystem umfasst einen Schaltpunktsensor, welcher einem Magneten ge genüberliegend gelagert ist, wobei der den Schaltpunktsensor passierende Magnet an einem linear beweglichen Element mechanisch befestigt ist. Da Magnetmaterialien sehr teuer sind, erhöhen diese die Kosten für das Sensorsystem. A sensor system and a piston-cylinder arrangement are known from DE 10 2012 219 173 A1. The sensor system comprises a switching point sensor which is mounted opposite a magnet, the magnet passing through the switching point sensor being mechanically attached to a linearly movable element. Since magnetic materials are very expensive, they add to the cost of the sensor system.
Die DE 10 2012 218 605 DE offenbart einen induktiven Schaltpunktsensor für eine Kupp- lungs-Zylinder-Anordnung, der eine mit einer Stromquelle verbundene primäre Spule und mindestens eine sekundäre Spule aufweist, die von einem beweglich gelagerten elektrisch leitfähigen T arget zur Erkennung eines Schaltpunktes überstrichen wird. Mit Hilfe dieser An ordnung kann zwar auf den Einsatz eines Magneten verzichtet werden, allerdings ist diese Anordnung in ihrer Herstellung sehr aufwendig. DE 10 2012 218 605 DE discloses an inductive switching point sensor for a clutch-cylinder arrangement, which has a primary coil connected to a power source and at least one secondary coil which is swept over by a movably mounted electrically conductive target to detect a switching point becomes. With the help of this arrangement on the use of a magnet can be dispensed with, but this arrangement is very expensive to produce.
Der Erfindung liegt die Aufgabe zugrunde, ein Messystem anzugeben, welches robust ausge bildet ist und trotzdem kostengünstig herstellbar ist. The invention is based on the object of specifying a measuring system that is robust and yet can be manufactured inexpensively.
Erfindungsgemäß ist die Aufgabe dadurch gelöst, dass das beweglich gelagerte Bauelement zumindest teilweise aus Edelstahl besteht, wobei in dem Edelstahl in Bewegungsrichtung des Bauelementes mindestens ein Bereich mit einer vorgegebenen Permeabilität integriert ist.According to the invention, the object is achieved in that the movably mounted component consists at least partially of stainless steel, with at least one area with a predetermined permeability being integrated in the stainless steel in the direction of movement of the component.
Dies hat den Vorteil, dass die magnetischen Bereiche innerhalb des Edelstahls erkannt wer den, da der Edelstahl lokal unterschiedliche magnetische Eigenschaften aufweist. Dadurch wird die Bewegung des Bauteiles detektiert. Auf die Verwendung von teurem Magnetmaterial kann somit verzichtet werden Ein solches Messystem ist einfach in der Herstellung und trotz dem robust und zuverlässig in der Anwendung. Im Weiteren soll unter Permeabilität die Durchlässigkeit für magnetische Felder verstanden werden. Vorteilhafterweise erstrecken sich in Bewegungsrichtung des Bauelements mehrere beab- standet zueinander angeordnete Bereiche mit gleicher Permeabilität in dem Edelstahl. This has the advantage that the magnetic areas within the stainless steel are recognized because the stainless steel has locally different magnetic properties. This detects the movement of the component. The use of expensive magnetic material can thus be dispensed with. Such a measuring system is simple to manufacture and, despite this, is robust and reliable in use. In the following, permeability should be understood to mean the permeability to magnetic fields. Advantageously, in the direction of movement of the component, a plurality of areas arranged at a distance from one another and having the same permeability extend in the stainless steel.
Dadurch lassen sich einzelne Positionen des sich bewegenden Bauteils einfach durch den Sensor detektieren. This means that individual positions of the moving component can be easily detected by the sensor.
In einer Ausgestaltung erstrecken sich in Bewegungsrichtung des Bauelements mehrere be- abstandet zueinander angeordnete Bereiche mit unterschiedlicher Permeabilität in dem Edel stahl. Bereiche mit unterschiedlicher Permeabilität erhöhen die Genauigkeit der Positionser kennung des Bauteils. In one embodiment, a plurality of regions with different permeability, which are arranged at a distance from one another, extend in the stainless steel in the direction of movement of the component. Areas with different permeability increase the accuracy of the position detection of the component.
In einer Variante weisen die Bereiche mit Permeabilität unterschiedliche Größen und/oder Formen auf. Dadurch wird die Positions- oder Zustandserkennung verfeinert. In a variant, the areas with permeability have different sizes and / or shapes. This refines the position or state detection.
In einer Ausführungsform ist die Permeabilität in dem Bereich als Struktur ausgebildet. In one embodiment, the permeability is designed as a structure in the area.
Dadurch lässt sich eine hohe Genauigkeit bei der Messung der Bewegung des Bauteiles rea lisieren. This makes it possible to achieve a high level of accuracy when measuring the movement of the component.
In einer weiteren Ausgestaltung liegt der magnetfeldabhängige Sensor dem beweglich gela gerten Bauteil direkt gegenüberliegt und trägt auf einer dem Bauteil abgewandten Seite einen Back-Bias-Magneten. Durch diesen Back-Bias-Magneten wird eine Vorspannung am Sensor eingestellt, wodurch das Sensorsignal vergrößert wird, was dessen Auswertung erleichtert. In a further embodiment, the magnetic field-dependent sensor lies directly opposite the movably mounted component and carries a back bias magnet on a side facing away from the component. This back-bias magnet sets a preload on the sensor, which increases the sensor signal, which makes it easier to evaluate.
In einer weiteren Variante ist die Permeabilität der Bereiche durch ein ferromagnetisches Ma terial realisiert. Bei dem Ferromagnetismus handelt es sich um den am häufigsten auftreten den Magnetismus, so dass solche Materialien kostengünstig in der Verwendung sind. In a further variant, the permeability of the areas is realized by a ferromagnetic material. Ferromagnetism is the most common type of magnetism, so such materials are inexpensive to use.
Bei dem beschriebenen Messsystem ist das Bauelement linear oder rotatorisch beweglich ge lagert, wobei der Sensor eine lineare Positionsänderung oder eine Winkeländerung detektiert, Somit ist dieses Messsystem vielfältig einsetzbar. In the measuring system described, the component is mounted so that it can move linearly or in a rotational manner, the sensor detecting a linear change in position or a change in angle. This measuring system can therefore be used in a variety of ways.
Eine Weiterbildung der Erfindung betrifft eine Vorrichtung zur Bestimmung einer Position ei nes Aktors in einem hydrostatischen Aktorsystem, vorzugsweise eines Kupplungsbetäti gungssystems in einem Fahrzeug, bei welchem ein Elektromotor zur Förderung einer Hydrau likflüssigkeit in einer Kolbeneinheit des Aktorsystems eine Rotorwelle zum Zusammenwirken mit einem Messsystem zur Bestimmung einer Winkellage der Rotorwelle aufweist. Das Mes- system ist dabei nach mindestens einem der in dieser Schutzrechtsanmeldung beschriebenen Merkmale ausgebildet. Vorteilhafterweise ist die Rotorwelle als Spaltrohr ausgebildet, welches in Bewegungsrichtung mehrere Bereiche mit gleicher und/ der unterschiedlicher Permeabilität aufweist. Eine solche robuste und kostengünstige Motorwelle lässt sich einfach in einer Serienproduktion hersteilen und benötigt weniger Bauraum, so dass die die Motorwelle umfassende Vorrichtung in ihren Ausmaßen reduziert werden kann. A further development of the invention relates to a device for determining a position of an actuator in a hydrostatic actuator system, preferably a clutch actuation system in a vehicle, in which an electric motor for conveying a hydraulic fluid in a piston unit of the actuator system is used to determine a rotor shaft for cooperation with a measuring system having an angular position of the rotor shaft. The measurement system is designed according to at least one of the features described in this application for property rights. The rotor shaft is advantageously designed as a can which has a plurality of areas with the same and / or different permeability in the direction of movement. Such a robust and inexpensive motor shaft can be easily manufactured in series production and requires less installation space, so that the device comprising the motor shaft can be reduced in size.
Die Erfindung lässt zahlreiche Ausführungsformen zu. Mehrere davon sollen anhand der in der Zeichnung dargestellten Figuren näher erläutert werden. The invention allows numerous embodiments. Several of these will be explained in more detail with reference to the figures shown in the drawing.
Es zeigen: Show it:
Fig. 1 ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung, 1 shows an embodiment of the device according to the invention,
Fig. 2 ein Ausführungsbeispiel des erfindungsgemäßen Messsystems, 2 shows an exemplary embodiment of the measuring system according to the invention,
Fig. 3 Ausführungsbeispiele eines beweglich gelagerten Bauteils gemäß Fig. 1. FIG. 3 exemplary embodiments of a movably mounted component according to FIG. 1.
In Fig. 1 ist ein Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung in Form eines hyd raulischen Aktors 1 zur Durchführung des erfindungsgemäßen Verfahrens dargestellt. Der hydraulische Kupplungsaktor 1 umfasst ein Steuergerät 2, das einen Elektromotor zur Betäti gung des Kupplungsaktors 1 ansteuert. Das Steuergerät 2 ist als Modul ausgebildet, welches mit einem Hydraulikmodul 3 verbunden ist. Bei einer Lageveränderung des Kupplungsaktors 1 ist eine Spindel 4 entlang eines axialen Aktorweges beidseitig bewegbar. Die Spindel 4 wird von dem Elektromotor angetrieben, der einen Stator 5 aufweist. Radial innerhalb des Stators 5 ist eine Rotorwelle 6 gelagert, die über ein nicht weiter gezeigtes Planetenwälzgetriebe mit der Spindel 4 im Eingriff steht. Die Rotorwelle besteht aus Edelstahl und weist in Rotationsrich tung mehrere magnetische Bereiche 10 auf. Das Planetenwälzgetriebe ist von einer Hülse 7 ummantelt. An der dem Steuergerät 2 abgewandten Ende 4.1 der Spindel 4 ist ein Druckstück 8 befestigt, welches auf ein nicht weiter dargestelltes Element einer hydraulischen Strecke, wie einen Geberzylinder, wirkt. Zwischen dem Druckstück 8 und dem Hydraulikmodul 3 er streckt sich ein Faltenbalg 11 , der den Aktor 1 vor Verschmutzung schützt. In Fig. 1, an embodiment of a device according to the invention is shown in the form of a hydraulic actuator 1 for performing the method according to the invention. The hydraulic clutch actuator 1 includes a control unit 2 which controls an electric motor for actuating the clutch actuator 1. The control device 2 is designed as a module which is connected to a hydraulic module 3. When the position of the clutch actuator 1 changes, a spindle 4 can be moved on both sides along an axial actuator path. The spindle 4 is driven by the electric motor, which has a stator 5. A rotor shaft 6 is mounted radially inside the stator 5 and is in engagement with the spindle 4 via a planetary roller gear (not shown). The rotor shaft is made of stainless steel and has several magnetic areas 10 in the direction of rotation. The planetary roller gear is encased in a sleeve 7. At the end 4.1 of the spindle 4 facing away from the control unit 2, a pressure piece 8 is attached, which acts on an element of a hydraulic path, not shown, such as a master cylinder. Between the pressure piece 8 and the hydraulic module 3 he stretches a bellows 11, which protects the actuator 1 from contamination.
Um die Spindel 4 auf eine gewünschte Position verfahren zu können, wird der Elektromotor kommutiert angesteuert. Dazu muss die Rotationsbewegung der Rotorwelle 6 erfasst werden. Dies erfolgt durch ein Messsystem 12, wie es in Fig. 2 dargestellt ist. Die Rotorwelle 6 besteht aus Edelstahl mit einer vorgegebenen Permeabilität m1. Entlang der Bewegungsrichtung der Rotorwelle 6 sind in gleichen Abständen die Bereiche 10 mit einem ferromagnetischen Mate- rial integriert. Diesen Bereichen 10 gegenüberliegend ist ein Hallsensor 13 angeordnet, wel cher einen Back-Bias-Magneten 14 auf seiner der Rotorwelle 6 abgewandten Seite aufweist. Mittels diesem Back-Bias-Magneten 14, wird das Signal des Hallsensors 13 magnetisch vor gespannt, so dass lokale Unterschiede des Magnetismus zuverlässig erkannt werden können, wenn sich die Rotorwelle 6 an dem Hallsensor 13 vorbei bewegt. In order to be able to move the spindle 4 to a desired position, the electric motor is activated commutated. For this purpose, the rotational movement of the rotor shaft 6 must be recorded. This is done by a measuring system 12, as shown in FIG. 2. The rotor shaft 6 is made of stainless steel with a predetermined permeability m1. Along the direction of movement of the rotor shaft 6, the areas 10 are provided with a ferromagnetic material at equal intervals rial integrated. A Hall sensor 13 is arranged opposite these areas 10 and has a back-bias magnet 14 on its side facing away from the rotor shaft 6. By means of this back-bias magnet 14, the signal from the Hall sensor 13 is magnetically tensioned so that local differences in the magnetism can be reliably detected when the rotor shaft 6 moves past the Hall sensor 13.
In Fig. 3 sind verschiedene Ausgestaltungen der ferromagnetischen Bereiche 10 gezeigt, die in der Rotorwelle 6 aus Edelstahl integriert werden können. Fig. 3a zeigt eine Draufsicht auf die Rotorwelle 6, welche zueinander gleichmäßig beabstandete Bereiche 10 mit der gleichen Permeabilität m2 aufweist, welche sich von der Permeabilität m1 des Edelstahls unterscheidet. In Fig. 3 different configurations of the ferromagnetic areas 10 are shown, which can be integrated in the rotor shaft 6 made of stainless steel. 3a shows a top view of the rotor shaft 6, which has regions 10 which are evenly spaced from one another and have the same permeability m2, which differs from the permeability m1 of the stainless steel.
In Fig. 3b sind rechteckige Bereiche 10, 15, 16 gezeigt, welche unterschiedliche Permeabilitä ten aufweisen. Neben der Permeabilität m2 des Bereiches 10, weist der Bereich 15 die Per meabilität m3 auf, während der Bereich 16 eine Permeabilität m4 besitzt. Darüber hinaus kön nen die Bereiche 10, 15, 16 auch unterschiedlich breit ausgebildet sein. In Fig. 3b rectangular areas 10, 15, 16 are shown which have different Permeabilitä th. In addition to the permeability m2 of the area 10, the area 15 has the permeability m3, while the area 16 has a permeability m4. In addition, the areas 10, 15, 16 can also have different widths.
Um eine Zustandserfassung eines Bauteiles zu vereinfachen, können die ferromagnetischen Bereiche Strukturen mit verschiedenen ferromagnetischen Eigenschaften aufweisen. Diese ferromagnetischen Eigenschaften können durch die Struktur eines Quadrates 17 oder eines Kreises 18 oder eines Dreiecks 19 oder eines Halbkreises 20 oder ähnlichem realisiert wer den (Fig. 3c). In order to simplify the detection of the condition of a component, the ferromagnetic areas can have structures with different ferromagnetic properties. These ferromagnetic properties can be realized by the structure of a square 17 or a circle 18 or a triangle 19 or a semicircle 20 or the like (Fig. 3c).
Die beschriebene Lösung ist nicht auf eine Winkelerkennung mit einem Rotorlagesensor be schränkt, sondern kann auch bei linearen Bewegungserkennungen eingesetzt werden. The solution described is not limited to an angle detection with a rotor position sensor, but can also be used for linear motion detection.
Bezugszeichenliste hydrostatischer Kupplungsaktor List of reference symbols for hydrostatic clutch actuator
Steuergerät Control unit
Hydraulikmodul Hydraulic module
Spindel spindle
Stator stator
Rotor rotor
Hülse Sleeve
Druckstück Pressure piece
Bereich mit ferromagnetischen Material Area with ferromagnetic material
Faltenbalg Bellows
Messsystem Measuring system
Hallsensor Hall sensor
Back-Bias-Magnet Back bias magnet
Bereich mit ferromagnetischem Material Area with ferromagnetic material
Bereich mit ferromagnetischen Material Area with ferromagnetic material
Quadrat square
Kreis circle
Dreieck triangle
Halbkreis Semicircle

Claims

Patentansprüche Claims
1. Messystem, umfassend einen magnetfeldabhängigen Sensor, der zur Erfassung eines Zustandes oder einer Bewegung eines beweglich gelagerten Bauelementes (6) die sem gegenüberliegend angeordnet ist, wobei das beweglich gelagerte Bauelement (6) eine Permeabilität trägt, dadurch gekennzeichnet, dass das beweglich gelagerte Bau element (6) zumindest teilweise aus Edelstahl besteht, wobei in dem Edelstahl in Be wegungsrichtung des Bauelementes (6) mindestens ein Bereich (10, 15, 16) mit einer vorgegebenen Permeabilität integriert ist. 1. Measuring system comprising a magnetic field-dependent sensor which is arranged opposite the sem to detect a state or a movement of a movably mounted component (6), wherein the movably mounted component (6) carries a permeability, characterized in that the movably mounted construction element (6) consists at least partially of stainless steel, with at least one area (10, 15, 16) having a predetermined permeability being integrated into the stainless steel in the direction of movement of the component (6).
2. Messsystem nach Anspruch 1 , dadurch gekennzeichnet, dass sich in Bewegungsrich tung des Bauelements (6) mehrere beabstandet zueinander angeordnete Bereiche (10) mit gleicher Permeabilität in dem Edelstahl erstrecken. 2. Measuring system according to claim 1, characterized in that in the direction of movement of the component (6) a plurality of spaced apart areas (10) with the same permeability extend in the stainless steel.
3. Messsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass sich in Bewe gungsrichtung des Bauelements (6) mehrere beabstandet zueinander angeordnete Bereiche (10, 15, 16) mit unterschiedlicher Permeabilität in dem Edelstahl erstrecken. 3. Measuring system according to claim 1 or 2, characterized in that in the direction of movement of the component (6) a plurality of spaced apart areas (10, 15, 16) with different permeability extend in the stainless steel.
4. Messsystem nach Anspruch 1 , 2 oder 3, dadurch gekennzeichnet, dass die Bereiche (10, 15, 16) Permeabilitäten unterschiedlicher Größen und/oder Formen aufweisen. 4. Measuring system according to claim 1, 2 or 3, characterized in that the areas (10, 15, 16) have permeabilities of different sizes and / or shapes.
5. Messsystem nach mindestens einem der vorhergehenden Ansprüche, dadurch ge kennzeichnet, dass die Permeabilität in dem Bereich (10, 15, 16) als Struktur (17, 18, 19, 20) ausgebildet ist. 5. Measuring system according to at least one of the preceding claims, characterized in that the permeability in the area (10, 15, 16) is designed as a structure (17, 18, 19, 20).
6. Messystem nach mindestens einem der vorhergehenden Ansprüche, dadurch gekenn zeichnet, dass der magnetfeldabhängige Sensor (13) dem beweglich gelagerten Bau teil (6) direkt gegenüberliegt und auf einer dem Bauteil (6) abgewandten Seite einen Back-Bias-Magneten (14) trägt. 6. Measuring system according to at least one of the preceding claims, characterized in that the magnetic field-dependent sensor (13) is directly opposite the movably mounted construction part (6) and on a side facing away from the component (6) has a back bias magnet (14) wearing.
7. Messsystem nach mindestens einem der vorhergehenden Ansprüche, dadurch ge kennzeichnet, dass die Permeabilität der Bereiche (10, 15, 16) durch ein ferromagneti sches Material realisiert ist. 7. Measuring system according to at least one of the preceding claims, characterized in that the permeability of the areas (10, 15, 16) is realized by a ferromagnetic material.
8. Messsystem nach mindestens einem der vorhergehenden Ansprüche, dadurch ge kennzeichnet, dass das Bauelement (6) linear oder rotatorisch beweglich gelagert ist, wobei der Sensor (13) eine Positionsänderung oder eine Winkeländerung detektiert 8. Measuring system according to at least one of the preceding claims, characterized in that the component (6) is mounted so as to be linearly or rotationally movable, the sensor (13) detecting a change in position or a change in angle
9. Vorrichtung zur Bestimmung einer Position eines Aktors in einem hydrostatischen Ak torsystem, vorzugsweise in einem Fahrzeug, bei welchem ein Elektromotor (5, 6) zur Förderung einer Hydraulikflüssigkeit in einer Kolbeneinheit des Aktorsystems (1) eine Rotorwelle (6) zum Zusammenwirken mit einem Messsystem (12) zur Bestimmung ei ner Winkellage der Rotorwelle (6) aufweist, dadurch gekennzeichnet, dass das Mess system (12) nach mindestens einem der vorhergehenden Ansprüche ausgebildet ist. 9. Device for determining a position of an actuator in a hydrostatic Ak sector system, preferably in a vehicle, in which an electric motor (5, 6) for Conveying a hydraulic fluid in a piston unit of the actuator system (1) has a rotor shaft (6) for interaction with a measuring system (12) for determining an angular position of the rotor shaft (6), characterized in that the measuring system (12) according to at least one of preceding claims is formed.
10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass die Rotorwelle (6) als Spaltrohr ausgebildet ist, welches in Bewegungsrichtung mehrere Bereiche (10, 15, 16) mit gleicher und/ oder unterschiedlicher Permeabilität aufweist. 10. The device according to claim 9, characterized in that the rotor shaft (6) is designed as a can which has several areas (10, 15, 16) with the same and / or different permeability in the direction of movement.
PCT/DE2020/100146 2019-04-26 2020-03-04 Measuring system WO2020216389A1 (en)

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