EP1259780A1 - 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
EP1259780A1
EP1259780A1 EP01911424A EP01911424A EP1259780A1 EP 1259780 A1 EP1259780 A1 EP 1259780A1 EP 01911424 A EP01911424 A EP 01911424A EP 01911424 A EP01911424 A EP 01911424A EP 1259780 A1 EP1259780 A1 EP 1259780A1
Authority
EP
European Patent Office
Prior art keywords
magnet
measuring device
sensitive
hall
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Withdrawn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
EP01911424A
Other languages
German (de)
English (en)
Inventor
Asta Reichl
Thomas Klotzbuecher
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 EP1259780A1 publication Critical patent/EP1259780A1/fr
Withdrawn legal-status Critical Current

Links

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
    • G01D5/145—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 invention is based on a measuring device for contactless detection of an angle of rotation according to the preamble of claim 1. So far, as described, for example, in DE 197 53 775.8 AI, flux guiding parts made of magnetically conductive material have been used in these measuring devices to guide the magnetic lines. This
  • measuring devices are therefore relatively large and can only be installed to a limited extent in measuring systems. Furthermore, the slope of the linear region of the measurement curve cannot be influenced sufficiently enough in this configuration.
  • a new measuring device for contactless detection of an angle of rotation has a rotor on which a magnet is arranged and a magnet-sensitive element for generating a measuring signal.
  • the rotor consists of magnetically non-conductive material and the magnet is planar and arranged parallel to a plane passing through the axis of the rotor.
  • the polarization of the magnet is diametrical to the axis. No flow parts are used with this measuring device. Further the assembly effort of this measuring device is greatly reduced. On the other hand, the linear range of the measurement curve cannot exceed 180 ° in this measuring device
  • the device according to the invention for the contactless detection of an angle of rotation with the combinations of features of claim 1 has the advantage that the two linear regions of the measurement curves of the two sensitive surfaces can be combined to form a continuously linear region up to an angle of 360 °. Despite this large angular range, the measuring device according to the invention is very small and inexpensive due to its simple construction.
  • the two sensitive Hall surfaces are preferably energized in opposite directions to one another, so that the precise rotational position of the object can be determined at any point in time or every angle of rotation of the object to be measured. This is possible simply by comparing the two output signals of the two sensitive Hall areas.
  • the two sensitive Hall surfaces are arranged on one plane.
  • the measurement signals of the two sensitive surfaces are carried separately.
  • the positioning of the two sensitive Hall surfaces is made easier, since the two surfaces must deliver the same results without matching with the same current and the same magnetic field. This applies above all to the positions shown in FIGS. 3 and 4. To that extent a complex comparison with a calibration curve, as in the known measuring devices, is not necessary.
  • the magnetically sensitive element and the magnet are preferably arranged with respect to one another in such a way that they describe a circular movement with respect to the distance x / 2 between the sensitive surfaces. This ensures simple calibration since the distance between the magnet and the magnet-sensitive element remains the same regardless of the relative angular position.
  • the magnet is preferably planar and arranged parallel to a plane passing through the axis of the rotor. On the one hand, this enables a homogeneous magnetic field in relation to the magnet-sensitive element and, on the other hand, it is insensitive to axial misalignment and its tolerance fluctuations
  • the polarization of the magnet is diametrical to the axis of the rotor.
  • a rectangular shape of the magnet with rounded corners, but also an oval or round shape of the magnet have proven to be preferred
  • the output signals of the two sensitive areas are evaluated by means of a comparison algorithm by means of which the position of the object to be measured can be determined in a simple form at any time drawing
  • FIG. 1 shows a schematic side sectional view of the measuring device according to the invention for contactless detection of an angle of rotation
  • FIG. 2 shows an enlarged illustration of the magnetically sensitive element from FIG. 1,
  • FIG. 3 is a schematic plan view of the inventive device of Figure 1, the
  • Polarization of the magnet is parallel to the orientation of the magnet-sensitive element
  • Figure 4 is a schematic plan view of the inventive device of Figure 1, the
  • Polarization of the magnet is perpendicular to the magnetically sensitive element.
  • FIG. 5 the characteristic curve of the sensitive surface 2
  • FIG. 6 the characteristic curve of the sensitive surface
  • FIG. 7 shows the superimposition of the two characteristic curves of the sensitive areas 2 and 3,
  • FIG. 8 shows an interconnected characteristic curve which results from a comparison algorithm applied to the two characteristic curves of the two sensitive areas. Description of the embodiments
  • 20 denotes a sensor, which is connected by means of a shaft 10 to a component, not shown, whose rotational movement is to be determined.
  • At least the carrier plate 9 and in particular also the shaft 10 consist of magnetically non-conductive material.
  • the carrier plate 9 is designed as a circular disc.
  • a permanent magnet 6 is fastened to the edge of the carrier plate 9, as shown in FIGS. 1, 3 and 4.
  • the permanent magnet 6 is planar, that is, it has no curve shape that would adapt to the circular shape of the carrier plate 9.
  • the permanent magnet 6 is arranged parallel to the axis 4 of the shaft 10.
  • the polarization of the permanent magnet 6 is directed diametrically to the axis 4. In other words, this means that the polarization is perpendicular to axis 4.
  • the permanent magnet 6 could also be fastened on an arm resting on the axis 4 or in a pot, which in turn could thus perform a circular movement.
  • the magnetically sensitive element 1 is connected to a printed circuit board 8 via pins 5.
  • the magnetically sensitive element is a Hall element 1, which together with an associated circuit on the Printed circuit board 8 is arranged.
  • Two sensitive Hall surfaces 2, 3 are integrated in the Hall element 1 and are shifted to the left and right by the distance x / 2 from the center line 4.
  • the sensitive areas 2 and 3 are energized in opposite directions to one another and thereby result in the characteristic curves shown in FIGS. 5 to 7, that is to say the characteristic curves of the two sensitive areas 2, 3 are phase-shifted from one another by 180 °.
  • the two sensitive areas 2, 3 lie on one level, as can be seen from FIG. 2, which enables simple positioning of the two Hall areas 2, 3
  • FIGS. 3 and 4 show two different rotational positions of the rotor 11 m with respect to the Hall element 1 with the Hall surfaces 2, 3 in a schematic plan view.
  • the magnet 6 moves with polarization represented by arrows along the circular path around the Hall element 1.
  • the polarization is parallel to the alignment of the two sensitive Hall surfaces 2, 3 and m
  • FIG. 4 is perpendicular to the alignment of the two sensitive ones Hall surfaces 2, 3.
  • Reference numeral 12 denotes the line of symmetry of the Hall element 1 in the two figures.
  • the magnet 6 is positioned parallel to the sensitive areas 2, 3 of the Hall element 1, the two sensitive areas 2, 3 must indicate the same voltage. This would correspond to the representation in FIG. 4.
  • the assignment shown in FIG. 3 must now be approached.
  • the magnet 6 is arranged at right angles to the sensitive surfaces 2, 3 of the Hall element 1, i.e. rotated by 90 ° compared to the representation m of Figure 4. In this position ( Figure 3), no magnetic flux is detected by the sensitive areas 2, 3, i.e. both sensitive areas indicate the neutral voltage.
  • FIG. 8 shows the output characteristic curve C after a comparison algorithm when the magnet 6 rotates once around the Hall element 1 by 360 °.
  • This output characteristic curve C is linear over the entire 360 ° range, whereby a very precise measurement of the respective rotational position of an object to be measured is possible.
  • the magnet 6 can be a simple, small, standard flat magnet.
  • the magnet 6 can be clipped onto the carrier plate 9, glued on, or injected into a plastic.
  • the design of the sensor 20 allows large geometric tolerances for magnets 6. If the magnet 6 has a homogeneous field in the Hall region, the sensor 20 is insensitive to axial offsets.
  • the positioning of the Hall element 1 together with the printed circuit board 8 to the magnet 6 can be carried out without great effort by comparing and evaluating the Synchronization can happen because the output signals of the sensitive surfaces 2 and 3 are led to the outside via the connection pins 5. It should also be pointed out that by integrating the two sensitive areas 2, 3, for example on a leed frame (not shown) and in a housing, the distance x / 2 can be set very precisely.
  • the two surfaces can of course be inclined towards one another, so that regardless of the position of the Hall element 1 relative to the magnet 6, a current is always induced on one of the two sensitive surfaces 2, 3 , In other words, regardless of the positioning of the Hall element 1 relative to the magnet 6, the two sensitive surfaces 2, 3 are never parallel in their alignment parallel to the polarization of the magnet 6.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (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 (10) pour la détermination sans contact d'un angle de rotation. Ce dispositif est constitué d'un rotor (11) non magnétiquement conducteur, sur lequel est placé un aimant (6), et d'un élément (1) fixe, sensible à un champ magnétique, servant à produire un signal de mesure. Cet élément (1) sensible à un champ magnétique présente deux faces (2, 3) sensibles se trouvant à une distance (x) l'une de l'autre.
EP01911424A 2000-02-24 2001-02-06 Dispositif de mesure pour la determination sans contact d'un angle de rotation Withdrawn EP1259780A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10008537 2000-02-24
DE10008537A DE10008537A1 (de) 2000-02-24 2000-02-24 Messvorrichtung zur berührungslosen Erfassung eines Drehwinkels
PCT/DE2001/000451 WO2001063212A1 (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
EP1259780A1 true EP1259780A1 (fr) 2002-11-27

Family

ID=7632165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01911424A Withdrawn EP1259780A1 (fr) 2000-02-24 2001-02-06 Dispositif de mesure pour la determination sans contact d'un angle de rotation

Country Status (5)

Country Link
US (1) US7042209B2 (fr)
EP (1) EP1259780A1 (fr)
JP (1) JP2003524171A (fr)
DE (1) DE10008537A1 (fr)
WO (1) WO2001063212A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002213206A (ja) * 2001-01-12 2002-07-31 Mitsubishi Heavy Ind Ltd ガスタービンにおける翼構造
US7023202B2 (en) * 2003-08-01 2006-04-04 Japan Servo Co., Ltd. Magnetic rotary position sensor
JP5479695B2 (ja) * 2008-08-06 2014-04-23 株式会社東海理化電機製作所 回転検出装置
CN101737383B (zh) * 2008-11-17 2014-02-26 海德堡印刷机械股份公司 用于在轴上夹紧或松脱驱动轮的装置
JP6049570B2 (ja) * 2013-08-27 2016-12-21 アルプス電気株式会社 回転検出装置

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 (15)

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Publication number Priority date Publication date Assignee Title
GB2071333B (en) * 1980-02-22 1984-02-01 Sony Corp Magnetic sensor device
CA1232957A (fr) * 1984-09-28 1988-02-16 Allan J. Hewett Capteur de mouvement rotatoire
US4908527A (en) * 1988-09-08 1990-03-13 Xolox Corporation Hall-type transducing device
DE4014885C2 (de) * 1989-05-13 1995-07-13 Aisan Ind Drehwinkelaufnehmer
JPH04248403A (ja) * 1991-02-01 1992-09-03 Asahi Chem Ind Co Ltd ホール素子を用いた角度検出装置
JP3206204B2 (ja) * 1992-05-22 2001-09-10 株式会社デンソー スロットルポジションセンサ
US5394029A (en) * 1993-02-17 1995-02-28 Gay; John C. Geomagnetic orientation sensor, means, and system
DE59510243D1 (de) * 1994-11-22 2002-07-18 Bosch Gmbh Robert Anordnung zur berührungslosen drehwinkelerfassung eines drehbaren elements
JP3833779B2 (ja) * 1997-05-16 2006-10-18 株式会社奥村組 免震装置
DE19722016A1 (de) * 1997-05-27 1998-12-03 Bosch Gmbh Robert Anordnung zur berührungslosen Drehwinkelerfassung
DE19737999B4 (de) * 1997-08-30 2009-09-10 Robert Bosch Gmbh Einrichtung zur Winkelerfassung und Winkelzuordnung
DE19741579A1 (de) * 1997-09-20 1999-03-25 Bosch Gmbh Robert Meßanordnung zum Erfassen der Lage eines Dauermagneten
US6137288A (en) * 1998-05-08 2000-10-24 Luetzow; Robert Herman Magnetic rotational position sensor
ATE298882T1 (de) * 1999-04-21 2005-07-15 Bosch Gmbh Robert Messvorrichtung zur berührungslosen erfassung eines drehwinkels
US6489761B1 (en) * 1999-09-09 2002-12-03 Delphi Technologies, Inc. Magnetic arrangement for an analog angle encoder

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 WO0163212A1 *

Also Published As

Publication number Publication date
DE10008537A1 (de) 2001-09-06
WO2001063212A1 (fr) 2001-08-30
US7042209B2 (en) 2006-05-09
US20030141863A1 (en) 2003-07-31
JP2003524171A (ja) 2003-08-12

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