EP0727040A1 - Capteur angulaire a commande manuelle - Google Patents

Capteur angulaire a commande manuelle

Info

Publication number
EP0727040A1
EP0727040A1 EP94912505A EP94912505A EP0727040A1 EP 0727040 A1 EP0727040 A1 EP 0727040A1 EP 94912505 A EP94912505 A EP 94912505A EP 94912505 A EP94912505 A EP 94912505A EP 0727040 A1 EP0727040 A1 EP 0727040A1
Authority
EP
European Patent Office
Prior art keywords
tongues
magnet
angle encoder
encoder according
angle
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Withdrawn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
EP94912505A
Other languages
German (de)
English (en)
Inventor
Walter Link
Siegfried Sticher
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.)
Euchner GmbH and Co KG
Original Assignee
Euchner GmbH and 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 Euchner GmbH and Co KG filed Critical Euchner GmbH and Co KG
Publication of EP0727040A1 publication Critical patent/EP0727040A1/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Withdrawn legal-status Critical Current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
    • G01D5/244—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/50—Driving mechanisms, i.e. for transmitting driving force to the contacts with indexing or locating means, e.g. indexing by ball and spring
    • H01H2003/506—Driving mechanisms, i.e. for transmitting driving force to the contacts with indexing or locating means, e.g. indexing by ball and spring making use of permanent magnets

Definitions

  • the invention relates to a manually operated Winkelg ⁇ ber with a rotatably mounted and manually movable encoder element, a sensor scanning this and a magnetically and contactless locking mechanism for the encoder element, which has a magnetic flux guide with a concentric to the axis of rotation of the encoder element in a row following tongues.
  • the encoder element is a disk, the outer edge zone of which is formed by the radially extending tongues.
  • This outer edge zone engages both between the transmitter and receiver of a light barrier as well as between two pole shoes, which abut the north pole or south pole of a permanent magnet and conduct its magnetic flux perpendicularly through the edge zone of the disk made of ferromagnetic material.
  • the two pole shoes are provided with radial teeth and tooth gaps between them, which are aligned with one another and have the same pitch as the tongues of the disk and the slots lying between them.
  • the air gap between the edge zone of the disk and the two pole pieces is small, a high cogging torque can be achieved even with very narrow teeth and tongues. The effort for the locking mechanism is relatively high.
  • the invention is therefore based on the object of providing a hand-operated angle sensor which is more economical can be set without having to do without a high cogging torque and small rotation angle between the successive cogging positions. This object is achieved by an angle encoder with the features of claim 1.
  • the magnet is arranged within the cylindrical surface defined by the tongues, because then the poles of the magnet can be provided in its outer surface, which, with the same number of poles, leads to a smaller magnet than an arrangement of the poles in an inner surface.
  • a reflection light barrier is used as the sensor, it can be directed against the tongues or tongue sections running perpendicular to the disk carrying it. If the tongues also have a section which extends radially outward with respect to the center of the disk, a reflection light barrier can also be directed against these sections. In both cases, it is necessary that the disk with the tongues provided on it form the rotatably mounted transmitter element and that the magnet and the sensor are arranged in a stationary manner.
  • a Hall generator can also be used as a sensor, for example.
  • the permanent magnet which is designed as a ring or disk, firmly on the manually rotatable shaft and to omit some tongues of the disk, which are to be arranged in a fixed manner next to one another, so that there is a gap for the magnetic field to reach the Hall generator.
  • Fig. 2 is a perspective view of the
  • Fig. 4 is a perspective view of the
  • Magnetic flux guide body of the second exemplary embodiment with an associated sensor.
  • a shaft 2 is rotatably mounted centrally in a circular disk-shaped front plate 1, which consists of a material that is neither agnetisable nor magnetically conductive.
  • a handwheel not shown, is fixedly arranged on its section projecting over one end face of the front plate 1.
  • the section of the shaft 2 projecting beyond the other end side carries a transmitter element, designated 3 as a whole, in a rotationally fixed and axially immovable manner.
  • This sensor element consists of a ferromagnetic sheet. It forms a circular disc 4, which is provided with a hole 4 1 in its center.
  • the disk 4 is fixed on the shaft 2 by means of a flange bushing 5. However, it can also be fastened in a different way and in particular also directly on the shaft 2, for example by riveting.
  • the disk 4 carries tongues 7 formed integrally with it, all of which have the same width and length and also the same shape and each have a gap 8 are separated from each other, which are also all the same size.
  • the tongues 7 have a first section which extends radially outwards and a second section which is at right angles to this first section. These second sections of the tongues 7 therefore define a cylindrical surface which is concentric with the center.
  • the disc 4 is arranged on the shaft 2 so that the second portion of the tongues 7 faces the front plate 1 and ends at a short distance from it.
  • An annular permanent magnet 9 is fixed concentrically to the shaft 2 on the end face of the front plate 1 facing the disk 4.
  • the dimensions of the permanent magnet 9, the disk 4 and the tongues 7 are, as shown in FIG. 1, so coordinated with one another that both between the disk 4 and the end face of the permanent magnet 9 facing it and between its outer jacket surface and the tongues 7 there is a small air gap.
  • the permanent magnet 9 is magnetized in such a way that in its outer surface, from which the second section of the tongues 7 is separated only by the small air gap, the north and south poles alternate in the circumferential direction, the angle between two immediately adjacent ones Poland is equal to the angle between two immediately adjacent tongues 7.
  • the former angle could also be larger or smaller than the latter angle. However, it is then necessary that one angle is always an integral multiple of the other angle.
  • the locking mechanism consisting of the permanent magnet 9 and the disk 4 with their tongues 7 as a magnetic flux guide body seeks to hold the disk 4 in one of those angular positions in which the tongues 7 are aligned with one of the poles.
  • the magnetic flux then passes through the air gap between the pole and the second section of the part of the tongue 7 which is oriented toward it, divides in it and closes via the two adjacent tongues, their air gap to the poles to which they are directed and these poles themselves to the pole between them. Since each of the magnetic circuits has its lowest magnetic resistance in this angular position, the locking mechanism generates a counter torque when the disk 4 rotates out of this angular position. Because of the large number of magnetic circuits, this is relatively high, even if the cogging torque of the individual magnetic circuits is low.
  • a reflection light barrier 10 is provided as a sensor, which generates a pulse-like signal with each rotation of the shaft 2 into the next latching position, which is why the angle transmitter can also be used as an incremental position transmitter, which is arranged on the inner wall of a pot-shaped housing 11 , which is closed by the front panel 1.
  • the reflection light barrier 10 can be arranged in such a way that it emits a radially inward light beam which, depending on the angular position of the pane 4, on the outside of the axially extending second section of one of the tongues 7 or the gap between two of these sections falls. This. The light beam is only sufficiently reflected when it falls on the tongue 7.
  • the light beam of the reflection light barrier can also be directed against this first section of the tongues 7.
  • a reflection light barrier 12 which of course could also be provided in addition to the reflection light barrier 10 if, for example, detection is required for a forward / backward rotation of the disk 4. In this case, however, all light barriers can also be directed against the first or against the second section of the tongues 7.
  • the exemplary embodiment shown in FIGS. 3 and 4 has, like the first exemplary embodiment, a circular disk-shaped front plate 101 made of magnetically non-conductive material, in which the shaft 102 is rotatably mounted. Serves as an encoder element in this embodiment, however, the annular permanent magnet 109, which is why it is arranged concentrically to the shaft 102 on the latter. Since in the exemplary embodiment the inner diameter of the permanent magnet 109 is larger than the outer diameter of the shaft 102, a hub body 113 is provided which carries the permanent magnet 109 and is fixedly connected to the shaft 102.
  • the disk 104 which is designed like the disk 4, is fixed on the inside of the front plate 101.
  • the tongues 107 formed integrally with it also have the same shape and size as the tongues 7.
  • the radially extending second section of the tongues 107 points away from the front plate 101 and ends flush in the exemplary embodiment with the end face of the permanent magnet 109 facing away from the front plate 101. Both There is a small air gap between the axially extending, second section of the tongues 107 and the cylindrical outer surface of the permanent magnet 109 and also between the disk 104 and the end face of the permanent magnet 109 facing it.
  • the latching mechanism formed from the permanent magnet 109 and the disk 104 with their tongues 107 tries to hold the shaft 102 in one of those angular positions in which the circumferential direction lies in the outer surface of the permanent magnet 109 tion alternately successive poles are each aligned with one of the axial sections of the tongues 107.
  • the operation of the locking mechanism is therefore the same as in the first embodiment.
  • a Hall generator 110 is provided as the sensor, which detects the magnetic field of the poles located in the outer lateral surface of the permanent magnet 109. It is therefore necessary for some of the tongues 107 lying next to one another to lack their axially extending second section to form a gap 114 through which the magnetic field can reach through the Hall generator 110.
  • the Hall generator 110 like the reflection light barrier 10, is fixed on the inner surface of the pot-shaped housing 111, which is closed by the front plate 101. Of course, it would also be possible to fix the Hall generator 110 to the front plate 101, which also applies to the reflection light barrier 10.

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 capteur angulaire à commande manuelle, qui comprend un élément transmetteur (3) à commande manuelle, montérotatif, un détecteur (10) qui balaie l'élément transmetteur et un mécanisme à crans pour l'élément transmetteur (3), qui agit de manière magnétique et sans contact et qui comporte un élément conducteur de flux magnétique présentant une ligne concentrique située à distance de languettes (7) successives. Les languettes (7) reposent au moins sur une partie de leur longueur dans une surface cylindrique concentrique à l'axe de rotation de l'élément transmetteur (3). Les pôles nord et les pôles sud successifs d'un aimant (9) placés en alternance dans le sens circonférentiel sont situés concentriquement à cette surface cylindrique et à une faible distance radiale de ladite surface. La subdivision angulaire des languettes (7) est identique à celle définie par l'angle existant entre deux pôles adjacents ou à un multiple entier de cette subdivision angulaire.
EP94912505A 1993-04-07 1994-03-23 Capteur angulaire a commande manuelle Withdrawn EP0727040A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4311496 1993-04-07
DE19934311496 DE4311496C2 (de) 1993-04-07 1993-04-07 Handbetätigter Winkelgeber
PCT/EP1994/000905 WO1994023273A1 (fr) 1993-04-07 1994-03-23 Capteur angulaire a commande manuelle

Publications (1)

Publication Number Publication Date
EP0727040A1 true EP0727040A1 (fr) 1996-08-21

Family

ID=6485000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94912505A Withdrawn EP0727040A1 (fr) 1993-04-07 1994-03-23 Capteur angulaire a commande manuelle

Country Status (4)

Country Link
EP (1) EP0727040A1 (fr)
JP (1) JPH08508819A (fr)
DE (1) DE4311496C2 (fr)
WO (1) WO1994023273A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19627089C1 (de) * 1996-07-05 1997-08-28 Euchner & Co Handbetätigter Winkelgeber
WO1998001723A1 (fr) * 1996-07-05 1998-01-15 Euchner Gmbh & Co. Capteur angulaire actionne manuellement
DE10010700C1 (de) * 2000-03-04 2001-09-13 Hopt & Schuler Ddm Drehgeber mit Rastverhalten
JP3968020B2 (ja) 2001-02-24 2007-08-29 マルクアルト ゲーエムベーハー 回転角調整装置
DE10130101B4 (de) * 2001-06-21 2007-10-18 Euchner Gmbh + Co. Kg Vorrichtung zum Erhöhen der Betätigungskraft eines Winkelgebers sowie Winkelgeber mit einer solchen Vorrichtung
DE102006020887A1 (de) * 2006-05-05 2007-11-08 Preisser Messtechnik Gmbh Handgeführtes Winkel- oder Gradmessgerät
FR2908903B1 (fr) * 2006-11-20 2010-09-10 Valeo Systemes Thermiques Dispositif d'indexation pour tableau de commande d'un systeme de ventilation,chauffage et/ou climatisation.
DE102009053676B3 (de) * 2009-11-19 2011-02-03 Windhorst Beteiligungsgesellschaft Mbh Einstellvorrichtung mit Raster
DE102012217347A1 (de) 2012-09-26 2014-03-27 BSH Bosch und Siemens Hausgeräte GmbH Eingabevorrichtung für Elektrogerät
DE202017100249U1 (de) 2017-01-18 2018-04-25 Ma Lighting Technology Gmbh Lichtstellpult mit Doppelwellenencoder

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1281549B (de) * 1962-11-15 1968-10-31 Siemens Ag Elektronischer Impulsgeber fuer einen Laeufer aufweisende Elektrizitaetszaehler, der eine dem Laeuferdrehwinkel entsprechende Impulszahl abgibt
US3742243A (en) * 1971-09-27 1973-06-26 Veeder Industries Inc Pulse generator
DE2649321C2 (de) * 1976-10-29 1985-08-14 Robert Bosch Gmbh, 7000 Stuttgart Kontaktloser Impulsgeber mit feldabhängigem Bauelement
DE2707082C3 (de) * 1977-02-18 1980-08-28 Ackeret Design & Engineering, Maur (Schweiz) Digitale optische Anzeigeeinrichtung
JPS5953503B2 (ja) * 1978-07-25 1984-12-25 三菱電機株式会社 回転検出装置
US4387299A (en) * 1979-06-25 1983-06-07 Yazaki Sogyo Kabushiki Kaisha Travel-distance signal generator for vehicles
DE3224386A1 (de) * 1982-06-30 1984-01-05 Starkstrom-Apparatebau GmbH, 7022 Leinfelden Handbetaetigter geber
US4779454A (en) * 1987-11-12 1988-10-25 Brunswick Corp. Crankshaft angle sensing system
US4893935A (en) * 1988-08-19 1990-01-16 Mandel William R Apparatus and method for optical density measurements of biomass processes
JPH0745014Y2 (ja) * 1989-10-23 1995-10-11 エヌティエヌ株式会社 パルスリング

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9423273A1 *

Also Published As

Publication number Publication date
JPH08508819A (ja) 1996-09-17
WO1994023273A1 (fr) 1994-10-13
DE4311496C2 (de) 1995-05-24
DE4311496A1 (de) 1994-10-13

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