WO2016005549A1 - Codeur magnétique à la périphérie d'arbre - Google Patents

Codeur magnétique à la périphérie d'arbre Download PDF

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Publication number
WO2016005549A1
WO2016005549A1 PCT/EP2015/065799 EP2015065799W WO2016005549A1 WO 2016005549 A1 WO2016005549 A1 WO 2016005549A1 EP 2015065799 W EP2015065799 W EP 2015065799W WO 2016005549 A1 WO2016005549 A1 WO 2016005549A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
signal element
carrier body
signal
peripheral surface
Prior art date
Application number
PCT/EP2015/065799
Other languages
German (de)
English (en)
Inventor
Jens Habig
Martin Haverkamp
S. Orcun Yapici
Original Assignee
Continental Teves Ag & Co. Ohg
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 Continental Teves Ag & Co. Ohg filed Critical Continental Teves Ag & Co. Ohg
Publication of WO2016005549A1 publication Critical patent/WO2016005549A1/fr

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
    • 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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets

Definitions

  • the invention relates to a position sensor element for a sensor for detecting a rotation according to the preamble of claim 1 and a sensor with a position sensor element.
  • Position transmitter elements with a magnetic encoder are known from the prior art.
  • the magnet encoder is incorporated on an end face of a shaft element and serves as a position sensor for a sensor.
  • the arrangement of the magnet ⁇ coders on the end face has the advantage that the diameter of the Magnetcoders can be variably adjusted in the range of the diameter of the end face of the shaft member.
  • the arrangement of the magnetic encoder on the end face has the disadvantage that when changing the external temperature, the expansion of the waves ⁇ elements is not equal to the extension of the magnetic encoder, resulting in additional mechanical stresses. In practice, therefore, often an elastic intermediate layer between the shaft member and the magnetic encoder is installed, which should compensate for the mechanical stresses or strains.
  • the object of the invention is therefore to show a sensor or a position sensor element that overcomes these disadvantages.
  • the invention makes use of the knowledge that the typical mechanical loads occurring during use are substantially more evenly distributed by rotation of the carrier body in the region of the circumferential surface than in the area of the end face.
  • the peripheral surface comprises the region of the carrier body which is arranged between the two end faces of the carrier body. It is immaterial whether the peripheral surface is formed flat or contoured.
  • the term peripheral surface encompasses the entire surface which connects the two end faces.
  • the arrangement of the signal element on the peripheral surface has the advantage that the mechanical stresses due to expansion of the carrier body at each point of the peripheral surface occur substantially uniformly and the signal element is easier to adjust it. The centrifugal forces act substantially evenly on the contact surface or contact surface of the signal element to the carrier body.
  • the contact surface of the signal ⁇ elements on the support body by the size of the peripheral surface without major problems can be increased so that pressure peaks can be avoided more easily than if one would arrange the signal element on the end face of the support body.
  • the stresses caused by thermal expansion are distributed evenly over the contact surface of the signal element on the carrier body, so that the signal element is easily interpretable to the respective loads.
  • the disadvantage of possibly increased expense in the production of the position sensor element can be circumvented by suitable manufacturing processes, as described below.
  • the carrier body is usually out ⁇ forms as a shaft member which is fixed to a rotating shaft itself.
  • the carrier body is disc-shaped.
  • the carrier body is designed as a metal body.
  • Trä ⁇ gerraj thus not about a shaft itself, but one on a shaft or the like. attachable body.
  • the thickness of the carrier body is designed so that the signal element covers the peripheral surface almost completely.
  • the shaft itself is the support body for the Sig ⁇ nalelement. The signal element would then be arranged on the lateral surface of the shaft.
  • the positional element according to the invention is further formed in front part ⁇ manner that the signal element has a base body and bound therein magnetic particles.
  • a signal element constructed in this way can be arranged particularly simply on the carrier body.
  • the positional element according to the invention is further developed in some exemplary prior ⁇ a manner that the material of the Ba sis stressess includes an elastomer, and the magnetic particles are magnetic particles connectable with the elastomer. Elastomers are particularly well suited because of their ease of molding and elasticity as a base body for the signal element.
  • the positional element according to the invention is further formed in front part ⁇ manner that the magnetic particles are sintered particles in the base body. In this way, a high resistance of the signal element can be achieved.
  • the positional element according to the invention is further formed in front part ⁇ manner that the support body of the base body of the signalment is or forms the latter. Instead of a separate base body for the magnetic particles, the magnetic particles are directly on the support body in the area of Applied circumferential surface.
  • the signal element is fastened particularly durable on the carrier body.
  • the position element according to the invention is further developed in an advantageous manner in that the signal element is designed as a magnetizable track, which is applied on the peripheral surface of the carrier body.
  • the position element according to the invention is further developed in an advantageous manner such that the carrier body has a depression or a groove on the peripheral surface into which the signal element can be inserted.
  • This shape of the peripheral surface is particularly well suited for receiving the signal element with a base body.
  • the position element according to the invention is thereby further developed in an advantageous manner that the trough has a U-shape.
  • the positional element according to the invention is further developed in some exemplary prior ⁇ a manner that the signal element is designed as a magnetic element, which he attests ⁇ a magnetic field whose magnetic effect propagates substantially in the axial direction of the carrier Köpers.
  • the positional element according to the invention is further developed in some exemplary prior ⁇ a manner that the signal element has a substantially U-shaped cross section, said Sig ⁇ nalelement is aligned in the groove in such a way that the opening of the U shape is directed radially outward.
  • the magnetic effect can be made particularly strong by the shaping in the region between the flanks of the signal element, so that in this way the signal quality can be improved.
  • the positional element according to the invention is further developed in some exemplary prior ⁇ a manner that the signal element and whose side walls are formed substantially flush locking with the peripheral surface of the carrier body.
  • the object is further achieved according to a second aspect of the invention by means of a sensor according to the second independent claim.
  • the sensor according to the invention is further developed in an advantageous manner that the sensor element has a printed circuit board, which is formed circular segment, wherein the radius is selected such that an edge region of the printed circuit board with a uniform distance to the signal element can be positioned.
  • the sensor element can ⁇ particularly advantageously between the flanks of the Sig ⁇ nalelements and as close as possible to the signal element positio ⁇ kidney in order to achieve a higher signal quality. Furthermore, this arrangement is particularly space-saving.
  • the sensor according to the invention is further developed in an advantageous manner in that the sensor element is arranged between the end faces of the carrier body adjacent to the signal element.
  • the sensor according to the invention is further developed in an advantageous manner in that the sensor has a plurality of sensor elements.
  • FIG. 1 shows a perspective partial view of a first exemplary embodiment of the sensor according to the invention
  • FIG. 2 shows a sectional view onto a partial cross section of the position-indicating element according to the first embodiment
  • Figure 3 is a sectional view on a partial cross section of the position sensor element according to a second
  • FIG. 4 shows a sectional view onto a partial cross section of the position-indicating element according to a third exemplary embodiment
  • Figure 1 shows the essential parts of the sensor of the invention, namely, a position sensor element 10 of the invention and two disposed on a printed circuit board 50 Sen ⁇ sorieri 51, 52.
  • the sensor elements 51, 52 are as like ⁇ -magnetic sensor elements are formed, the ⁇ donor element specified by the position signals to capture.
  • the position sensor element 10 is equipped with a signal element 11 which has alternating magnetic poles in a ring formation.
  • the invention is not limited to this form of the signal element.
  • Other parts of the sensor, such as a housing, connectors, etc. have been hidden from the figures for better representation of the aforementioned elements.
  • the position sensor element 10 has a carrier body 11 with two axial end faces 12, 13, wherein the second end face 13 of the carrier body 11 is concealed in FIG.
  • the end faces 12 and 13 are connected by means of a circumferential surface 14, which is here largely covered by the signal element 20.
  • a better view of the peripheral surface is shown in Figures 2 to 4.
  • the carrier body 10 is made of a metallic material and is annular. In this way, the carrier body on a shaft or the like. be attached.
  • the inner peripheral surface 15 and the end faces 12, 13 can be provided with an arbitrary contour as required and have no significant influence on the execution of the invention.
  • the signal element 20 is arranged on the outer peripheral surface or peripheral surface 14 of the carrier body 10. As can be seen in FIGS.
  • the circumferential surface is contoured due to the depression 16 between the end surfaces.
  • the signal element 20 is disposed or incorporated within the trough 16.
  • the depth of the trough is designed so that it can receive the signal element 20 We ⁇ sentlichen complete and the upper or radially outer edges of the signal element is substantially flush with the radially outer edges of the peripheral surface 14 ends.
  • a contact surface which covers substantially the entire peripheral surface 14. Radially outward forces are distributed evenly over the contact surface.
  • the signal element 20 has a base body 21, in which magnetic particles are incorporated. These can be incorporated into the base body 21 in different ways.
  • the embodiment shown in Figure 1 shows a base body 21 made of an elastomer.
  • the base body 21 of the signal element 20 has a substantially U-shaped cross-section, wherein the opening of the U-shape in the radial direction facing outwards.
  • the side walls or flanks of the base body 21 extend in the radial direction and partially surround a small area into which the sensor elements 51, 52 can be arranged.
  • the two flanks of the sensor element 20 make it possible to build up a magnetic field which extends in regions in the axial direction, which is for detecting the rotation of the Carrier body is particularly advantageous.
  • the sensor elements are constructed and posi ⁇ tioniert so that they are disposed within the space enclosed by the signal element 20 range.
  • the printed circuit board is a circular segment 50 is formed from ⁇ and the radius of the printed circuit board corresponds approximately to the outer radius of the base body 21 so that an edge portion of the printed circuit board is positioned at a uniform distance from the signal element 21st
  • FIGS 3 and 4 show two alternative embodiments.
  • the reference numerals of identical elements have been retained for the second and third embodiments.
  • the carrier body 11 has a circumferential surface 14b, which merges into an open end surface 12b.
  • the end face 12b opposite this end face 12b has a larger outer radius than the end face 12b, so that the support body 11 has a semi-open U-profile in the area of the circumferential face 14b and the signal element 20b can be supported thereon.
  • the signal element 20b is further formed substantially with a U-shaped cross section, wherein the side facing the open end face 12b of the base body 21b signal ⁇ elements 20b flush with the open end face 12b and closes also engages around a rounding 17, which is arranged in the transition from the peripheral surface 14b to the open end face 12b.
  • the open end face 12b is widened in this way by the base body 21b, so that the flanks of the base body 21b further enclose a region 16 in which the sensor elements 51, 52 can be arranged.
  • FIG. 4 shows a third exemplary embodiment that is similar to the second exemplary embodiment.
  • the signal element 20 is now provided with a base body 21c, which is also open to the open end face 12b.
  • the cross section of the base body therefore resembles an L-shape.
  • the sensor elements 51, 52 are disposed adjacent to the radially extending edge of the Ba ⁇ sis stressess 21c.
  • the semi-open profile of the carrier body 11 allows a simpler attachment of the signal element 20b, 20c to the carrier body.
  • the third embodiment also has the advantage that the positioning of the sensor elements 51, 52 adjacent to the signal element 20c is easier, even under tight space conditions.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

L'invention concerne un élément de détection de position (10) destiné à un capteur (1) pour détecter une rotation, comprenant - un corps de support (11) pourvue de deux faces frontales axiales (12, 12b, 12c, 13) et d'une face circonférentielle (14, 14b) reliant les deux faces frontales (12, 12b, 12c, 13), - au moins un élément de signal (20, 20b, 20c) qui peut être codé en une pluralité de parties magnétiquement différentes les unes des autres, les parties pouvant être détectées par un élément de capteur (51, 52) pour mesurer un mouvement de rotation, et l'élément de signal (20, 20b, 20c) étant monté sur le corps de support (11). L'invention est caractérisée en ce que l'élément de signal (20, 20b, 20c) est disposé sur la surface circonférentielle (14, 14b) du corps de support (11).
PCT/EP2015/065799 2014-07-10 2015-07-10 Codeur magnétique à la périphérie d'arbre WO2016005549A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014213483.8A DE102014213483A1 (de) 2014-07-10 2014-07-10 Magnetischer Encoder am Wellenumfang
DE102014213483.8 2014-07-10

Publications (1)

Publication Number Publication Date
WO2016005549A1 true WO2016005549A1 (fr) 2016-01-14

Family

ID=53724321

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/065799 WO2016005549A1 (fr) 2014-07-10 2015-07-10 Codeur magnétique à la périphérie d'arbre

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DE (1) DE102014213483A1 (fr)
WO (1) WO2016005549A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017103920A1 (de) 2017-02-24 2018-08-30 Petz Industries Gmbh & Co. Kg Stellantrieb

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908599A1 (de) * 1978-03-06 1979-09-20 Nippon Electric Co Magnetischer umlaufkodierer
DE2907797A1 (de) * 1978-02-28 1980-01-10 Nippon Electric Co Magnetischer umlaufkodierer
US20070139042A1 (en) * 2005-12-20 2007-06-21 Electricfil Automotive Magnetic position sensor with optimized detection
US20080074104A1 (en) * 2006-09-22 2008-03-27 Dichtungstechnik G. Bruss Gmbh & Co. Kg Displaceable component including a position-defining element made of a magnetized elastomer
EP2336729A1 (fr) * 2008-09-11 2011-06-22 NTN Corporation Dispositif de détection de rotation et roulement avec dispositif de détection de rotation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6225267A (ja) * 1985-07-26 1987-02-03 Honda Motor Co Ltd 磁気信号発生リング
JP2004257817A (ja) * 2003-02-25 2004-09-16 Ntn Corp 磁気エンコーダおよびそれを備えた車輪用軸受
DE102004004024A1 (de) * 2004-01-20 2004-11-18 Valeo Schalter Und Sensoren Gmbh Lenkwinkelsensor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2907797A1 (de) * 1978-02-28 1980-01-10 Nippon Electric Co Magnetischer umlaufkodierer
DE2908599A1 (de) * 1978-03-06 1979-09-20 Nippon Electric Co Magnetischer umlaufkodierer
US20070139042A1 (en) * 2005-12-20 2007-06-21 Electricfil Automotive Magnetic position sensor with optimized detection
US20080074104A1 (en) * 2006-09-22 2008-03-27 Dichtungstechnik G. Bruss Gmbh & Co. Kg Displaceable component including a position-defining element made of a magnetized elastomer
EP2336729A1 (fr) * 2008-09-11 2011-06-22 NTN Corporation Dispositif de détection de rotation et roulement avec dispositif de détection de rotation

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