EP1269120A1 - Dispositif de mesure pour la determination sans contact d'un angle de rotation - Google Patents

Dispositif de mesure pour la determination sans contact d'un angle de rotation

Info

Publication number
EP1269120A1
EP1269120A1 EP01911423A EP01911423A EP1269120A1 EP 1269120 A1 EP1269120 A1 EP 1269120A1 EP 01911423 A EP01911423 A EP 01911423A EP 01911423 A EP01911423 A EP 01911423A EP 1269120 A1 EP1269120 A1 EP 1269120A1
Authority
EP
European Patent Office
Prior art keywords
measuring device
magnet
magnetic field
angle
sensitive element
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.)
Withdrawn
Application number
EP01911423A
Other languages
German (de)
English (en)
Inventor
Erwin Krimmer
Asta Reichl
Thomas Klotzbuecher
Bernhard Bauer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1269120A1 publication Critical patent/EP1269120A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/30—Controlling members actuated by foot
    • G05G1/38—Controlling members actuated by foot comprising means to continuously detect pedal position
    • 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
    • G01D11/245—Housings for sensors
    • 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

Definitions

  • the present invention relates to a measuring device for contactless detection of an angle of rotation, in particular for detection of an angle of rotation of a pedal arrangement.
  • Anti-lock braking systems, anti-skid control or electronic braking systems application It is necessary to detect the position of a brake pedal and / or an accelerator pedal as precisely as possible in order to be able to send corresponding signals to the control device of the electronic system. It has been proposed to mount measuring devices on the foot pedal mechanism of the pedal, but this can lead to unfavorable installation geometries in the pedal area.
  • a measuring device for contactless detection of an angle of rotation in which a carrier plate made of magnetically non-conductive material serves as a rotor.
  • a permanent magnet is arranged on the carrier plate, which is planar and its
  • a Hall element is arranged asymmetrically, so that an elliptical rotary movement of the Hall element takes place relative to the permanent magnet. This results in a steeply falling and a flat area in the curve of the output signal.
  • a device according to the invention for contactless detection of an angle of rotation with the features of main claim 1 has the advantage that no wear can occur on the measuring device, since there are no moving parts on the measuring device. This is made possible by the fact that a magnetic field-sensitive element is arranged on a fixed shaft. A magnet is attached to a rotatable element whose angle of rotation is to be detected and rotates together with the rotatable element around the magnetic field-sensitive element. This rotary movement of the magnet changes the magnetic flux in the magnetic field-sensitive element and a corresponding signal can be sent to a control device.
  • the measuring device according to the invention has no moving parts, since the magnet is rotated together with the rotatable element and is therefore also rotatably supported via the bearing of the rotatable element.
  • the magnet it is also possible for the magnet to be arranged on the fixed shaft and for the magnetic field-sensitive element to be attached to the rotatable element and to rotate around the magnet together with the rotatable element.
  • the shaft is preferably also provided as an axis of rotation for the rotatable element. This results in a small size of the measuring device according to the invention and the number of parts can be kept small.
  • a recess is provided in the shaft.
  • the magnetic field-sensitive element or the magnet is then arranged in this recess.
  • a spring element is provided which is supported against a wall of the recess in the shaft.
  • An adjusting element is preferably provided in order to adjust the position of the element or the magnet which is arranged in the recess or the magnet relative to the magnet or element which is correspondingly arranged on the rotatable element.
  • a screw, a bolt, a pin or a notch pin is advantageously used as the one-piece element.
  • a screw enables a very fine adjustability of the magnetic flux in the starting position of the measuring device.
  • the magnetic field-sensitive element is preferably arranged on a circuit board.
  • this can be arranged in a housing or a plastic encapsulation can be packaged.
  • the circuit board is preferably connected to the housing via Spring contacts are provided so that there is no rigid connection between the circuit board and the housing.
  • This makes it possible to implement a bending edge in the measuring device according to the invention. This bending edge in particular facilitates the setting of the position of the magnetic field-sensitive element or of the magnet by means of the adjusting element.
  • contacting via spring contacts has the advantage that the assembly of the sensor is considerably simplified.
  • the magnet or the element sensitive to the magnetic field can be fixedly mounted on the rotatable element separately from the actual measuring device. There are no further
  • Flow guide pieces are present in the measuring device according to the invention and there is a simple and inexpensive assembly, since all the individual parts can be put together from one side.
  • a simple, small magnet can be used as a magnet for the measuring device according to the invention
  • Standard magnet can be used. Due to the design and the principle of operation of the measuring device according to the invention, large geometric tolerances for magnets are still permissible. This can reduce the cost of the magnet in particular.
  • the measuring device according to the invention can in particular on the foot pedal mechanism
  • Pedal assembly can be attached.
  • a return spring for the measuring device can also be omitted, since the magnet or the magnetic field-sensitive element is firmly connected to the pedal. As a result, the magnet or the magnetic field-sensitive element is attached to the Pedal arrangement existing spring element reset together with the pedal arrangement again.
  • Figure 1 shows an exploded view of a
  • Figure 2 shows a perspective, partially sectioned view of the measuring device according to the embodiment
  • FIG. 3 shows an exploded view of the measuring device according to the exemplary embodiment when used on a pedal arrangement.
  • FIGS. 1 to 3 An exemplary embodiment of a measuring device according to the invention is shown in FIGS. 1 to 3. This
  • Measuring device is used in particular in a pedal arrangement of a vehicle.
  • the measuring device comprises a housing 3 with spring contacts 4, which are connected to a control device, not shown.
  • the measuring device further comprises a magnetic field-sensitive element 6, which is arranged on a T-shaped circuit board 5.
  • a field plate, magnetic transistors, magnetoresistive elements, a coil or a Hall element can be used as the magnetic field sensitive element 6 be used. It is important that the magnetic field sensitive element has a linear dependence of its output signal on the magnetic induction
  • the circuit board 5 is arranged on a mounting plate 2, which together with the circuit board 5 m, the housing 3 is glued, clipped or welded.
  • the circuit board 5 is arranged in the housing 3 such that the landing points 16 provided on the circuit board 5 can be contacted with the spring tongues 4 of the housing 3. This results in a non-rigid, i.e. a flexible connection between the connector tongues 4 and the circuit board 5
  • a shaft 11 is further provided which has a continuous recess 14. But it can also be a blind hole. Further from the outside of the shaft is e.g. a threaded bore 15 is formed to the recess 14.
  • the measuring device is now arranged in the recess 14 of the shaft 11 in such a way that a spring element 9 provided on the housing 3 is braced against an upper wall of the recess 14 and is arranged above the element 6 sensitive to the magnetic field. As a result, the magnetic field sensitive element 6 is down, i.e. Direction of bore 15, biased.
  • the spring element 9 is made of spring steel and has a clamp shape with a base body and two lateral arms protruding from the base body. However, it is also possible as a spring element e.g. to provide a rubber block.
  • the arrangement of the measuring device of the recess 14 of the shaft 11 places the measuring device firmly regardless of housing tolerances and by means of the
  • a flexible bending edge 7 is provided on the housing 3.
  • the housing 3 As a result, no damage to the housing 3 occurs during the positioning of the magnetic field-sensitive element 6 via the screw 8, but a slight deformation of the housing 3, the mounting plate 2 and the circuit board 5 occurs in the region of the bending edge 7.
  • the bending edge 7 is formed at the transition of the T-shaped housing 3 or the mounting plate 2 or the board 5 between the longitudinal and the crossbar of the T-shape.
  • a magnet 10 is fixedly attached to the pedal lever mechanism 12 of a pedal arrangement for a vehicle.
  • the magnet 10 can for example be glued, clipped or injected.
  • the shaft 11 also serves as an axis of rotation for the pedal lever mechanism 12.
  • two bearing bushes 13 are arranged on the outer sides of the shaft 11 (cf. FIG. 1).
  • two friction shells 17, a foot pedal 18 and base housing 19 are provided on the pedal lever mechanism 12.
  • the magnetic field-sensitive element 6 is fixed in place on the bearing block (base housing) of the pedal lever mechanism 12. The functioning of the measuring device according to the invention is described below. If a driver now changes the position of the pedal lever mechanism 12 by stepping on the foot pedal 18, the pedal lever mechanism 12 rotates around the as
  • Shaft 11 serving as the axis of rotation.
  • the shaft 11 remains stationary.
  • the rotation of the pedal lever mechanism 12 also simultaneously rotates the magnet 10 fixedly attached to it.
  • the magnet 10 rotates about the magnetic field-sensitive element 6, which is arranged in the cutout 14 in the stationary shaft 11.
  • the magnetic induction in the magnetic field-sensitive element 6 thus changes as a function of the magnetic position and a linear output signal is generated which is forwarded to a control unit (not shown). If the magnetic field-sensitive element 6 has been adjusted by means of the screw 8 in such a way that the magnetic induction in the magnetic field-sensitive element 6 is zero in the starting position of the pedal lever mechanism, it is also possible to maintain a low tolerance over the temperature.
  • a measuring device can be provided which can be used with little installation effort and a compact design, in particular with a pedal arrangement for angles up to 35 °.
  • a measuring device for contactless detection of an angle of rotation which comprises a magnet 10 and a magnetic field sensitive
  • Element 6 includes.
  • the magnetic field-sensitive element 6 is arranged in a stationary manner on a fixed shaft 11.
  • the magnet 10 is attached to a rotatable element 12, the angle of rotation of which is to be recorded.
  • the magnet 10 rotates together with the rotatable element 12 about the magnetic field sensitive Element 6. This produces a linear output signal depending on the position of the magnet relative to the element 6 sensitive to the magnetic field.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

L'invention concerne un dispositif de mesure servant à la détermination sans contact d'un angle de rotation, qui comprend un aimant (10) et un élément (6) sensible à un champ magnétique. Cet élément (6) est monté à demeure sur un arbre (11) fixe. L'aimant (10) est monté sur un élément (12) pouvant tourner, dont l'angle de rotation doit être déterminé. Lors de l'actionnement de l'élément (12) pouvant tourner, l'aimant (10) tourne avec cet élément (12) autour de l'élément (6) sensible à un champ magnétique. Ainsi, un signal de sortie linéaire est généré au niveau de l'élément (6) sensible à un champ magnétique, en fonction de la position de l'aimant.
EP01911423A 2000-02-24 2001-02-06 Dispositif de mesure pour la determination sans contact d'un angle de rotation Withdrawn EP1269120A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2000108540 DE10008540A1 (de) 2000-02-24 2000-02-24 Messvorrichtung zur berührungslosen Erfassung eines Drehwinkels
DE10008540 2000-02-24
PCT/DE2001/000450 WO2001063211A1 (fr) 2000-02-24 2001-02-06 Dispositif de mesure pour la determination sans contact d"un angle de rotation

Publications (1)

Publication Number Publication Date
EP1269120A1 true EP1269120A1 (fr) 2003-01-02

Family

ID=7632168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01911423A Withdrawn EP1269120A1 (fr) 2000-02-24 2001-02-06 Dispositif de mesure pour la determination sans contact d'un angle de rotation

Country Status (3)

Country Link
EP (1) EP1269120A1 (fr)
DE (1) DE10008540A1 (fr)
WO (1) WO2001063211A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10104872A1 (de) * 2001-02-03 2002-08-29 Bosch Gmbh Robert Messvorrichtung zur berührungslosen Erfassung eines Drehwinkels
DE10129222B4 (de) 2001-06-19 2005-10-27 Siemens Ag Magnetfeldsensor und Verfahren zur Herstellung eines solchen
DE10142649A1 (de) * 2001-08-31 2003-04-24 Schott Glas Verfahren zur Herstellung bruchfester Calciumfluorid-Einkristalle sowie deren Verwendung
DE102005013442A1 (de) * 2005-03-23 2006-09-28 Robert Bosch Gmbh Fahrpedalmodul mit magnetischem Sensor
DE102005055732A1 (de) * 2005-11-23 2007-05-31 Volkswagen Ag Pedalhebelwerk mit einem berührungslosen Stellungssensor
DE102008003296B4 (de) * 2008-01-05 2016-04-28 Hella Kgaa Hueck & Co. Fahrpedal
DE102009027864A1 (de) * 2009-07-21 2011-02-03 Robert Bosch Gmbh Pedaleinheit, berührungsfreie Sensorik zur Erfassung einer Bewegung eines Pedals,Gebereinrichtung, Sensorelement und Verfahren zur Herstellung einer Pedaleinheit.
DE102012208589A1 (de) * 2012-05-23 2013-11-28 Zf Friedrichshafen Ag Magnet-Trägergehäuse-Baugruppe

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19634281A1 (de) * 1996-08-24 1998-02-26 Bosch Gmbh Robert Meßvorrichtung zur berührungslosen Erfassung eines Drehwinkels bzw. einer linearen Bewegung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19701637A1 (de) * 1997-01-20 1998-07-23 Mannesmann Vdo Ag Pedaleinrichtung
IT1293463B1 (it) * 1997-07-18 1999-03-01 Trw Sipea Spa Gruppo sensore di sterzata.
DE19817356A1 (de) * 1998-04-18 1999-10-21 Bosch Gmbh Robert Winkelgeber und Verfahren zur Winkelbestimmung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19634281A1 (de) * 1996-08-24 1998-02-26 Bosch Gmbh Robert Meßvorrichtung zur berührungslosen Erfassung eines Drehwinkels bzw. einer linearen Bewegung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO0163211A1 *

Also Published As

Publication number Publication date
DE10008540A1 (de) 2001-09-06
WO2001063211A1 (fr) 2001-08-30

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Inventor name: KLOTZBUECHER, THOMAS

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