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WO2003008911A1 - Systeme de mesure pour determiner sans contact l'angle de rotation et la position axiale d'un objet de mesure - Google Patents

Systeme de mesure pour determiner sans contact l'angle de rotation et la position axiale d'un objet de mesure Download PDF

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Publication number
WO2003008911A1
WO2003008911A1 PCT/AT2002/000204 AT0200204W WO03008911A1 WO 2003008911 A1 WO2003008911 A1 WO 2003008911A1 AT 0200204 W AT0200204 W AT 0200204W WO 03008911 A1 WO03008911 A1 WO 03008911A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotation
measurement object
sensor
measuring arrangement
chip
Prior art date
Application number
PCT/AT2002/000204
Other languages
German (de)
English (en)
Inventor
Siegfried Rossmann
Colin Steele
Original Assignee
Austriamicrosystems Ag
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 Austriamicrosystems Ag filed Critical Austriamicrosystems Ag
Publication of WO2003008911A1 publication Critical patent/WO2003008911A1/fr

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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

Definitions

  • the invention relates to a measurement arrangement for contactless detection of the angle of rotation and the axial position of a measurement object, in which magnetic, optical or magneto-optical structures are arranged on the measurement object and at least one sensor is provided for detecting these structures.
  • the known designs include, for example, counting disks whose rotation corresponds to the change in the angle of rotation to be measured. Recesses or teeth are arranged on the circumference of such counting disks, which can be detected by optical sensors or by capacitive or inductive proximity switches.
  • the triggered counting pulses can subsequently be processed electronically, in addition to the possibility of detecting and storing incremental angle changes in such a way.
  • the direction of rotation must also be recorded in such measuring devices, wherein the absolute angle of rotation can also be calculated by summing the incremental angle changes.
  • the invention now aims to provide a measuring arrangement of the type mentioned at the beginning, in which not only the angle of rotation, with little circuitry outlay and without additional mechanical elements, such as, for example, reduction gears or separate markings for detecting the axial displacement of a measurement object, but also the axial position of a measurement object can be reliably detected, such a measurement should give exact values even if the power supply is interrupted in the meantime.
  • the measurement arrangement according to the invention essentially consists in that the structures on the end face of the measurement object are arranged transversely to or outside the axis of rotation of the measurement object and that they are at a distance from the end face in a plane penetrated by the axis of rotation at least one chip is arranged with at least one sensor for detecting the rotational position and the axial distance.
  • sensors are housed in a common chip and the arrangement is such that the chip is arranged at a distance from the end face in a plane through which the axis of rotation of the measurement object passes, sensors can be accommodated in a chip with which on the On the basis of different evaluation algorithms, a statement about the axial distance as well as a statement about the rotational position of the measurement object is made possible.
  • the measurement object thus only requires magnetic, optical or magneto-optical structures on its end face in a manner known per se, which in the simplest case can be formed by a magnet extending transversely to the axis of rotation, with the sensors of the chip both the axial position and the rotational position can be recorded.
  • the design is such that the chip contains an integrated circuit for evaluating at least one sensor signal, so that the circuit complexity for subsequent evaluations is significantly reduced and the respective operating states and, if appropriate, malfunctions can be detected reliably due to incorrect orientation. which significantly improves operational safety.
  • a self-test function of the sensors can also be connected by means of such an integrated circuit in the chip, so that functional diagnosis is also possible at any time.
  • the structures arranged on the end face of the measurement object decode the rotational position in this way, and depending on the choice of the corresponding sensors by means of the same sensor element, a distance measurement is also made possible, for example by evaluating the amplitudes of the signals obtained.
  • the design is such that the integrated circuit has a phase decoder for determining the phase position of a cyclic signal of at least one sensor and a circuit for determining the amplitude of the cyclic signal, wherein advantageously the cyclic signal comprises a sine and a cosine signal and the integrated circuit contains a computing circuit, in particular a quotient.
  • Hall sensors can be used, which can be arranged in the chip in a circle around the axis of rotation, the separate evaluation of the amplitude directly providing information about the axial position of the measurement object.
  • the design according to the invention is advantageously made such that the chip contains at least one Hall probe and the measurement object has at least one magnet which is arranged diametrically transverse to the axis of rotation on the end face, the chip advantageously having a plurality of over one of the axes of rotation of the Measuring object penetrated envelope circle distributed sensors.
  • the design can also be made in a particularly simple manner such that at least one sensor as an optical sensor and at least one further sensor is designed as an inductive or capacitive proximity sensor in the same chip.
  • the additional sensor designed as an inductive or capacitive proximity sensor on the chip for detecting the axial position of the measurement object can be evaluated in a conventional manner and also with the circuit integrated in the chip.
  • the measurement object itself can be formed on a steering column, a spindle or a pressure and rotary switch, it being possible for a plurality of axial displacement positions of the pressure switch to be evaluated separately, for example if they are designed as pressure and rotary switches. In this way, it is possible to detect rotational angle adjustments of such a pressure and rotary switch in different planes and to significantly reduce the mechanical complexity of a switch for a plurality of different switching positions.
  • FIG. 1 shows the measuring arrangement according to the invention for detecting the angle of rotation of a steering column of a motor vehicle
  • FIG. 2 shows the measuring arrangement for detecting the switching state of a rotary and pressure switch
  • FIG. 3 shows the signal curve of a sensor used.
  • Fig. 1 represents a steering column or a part connected to a steering column with an axis of rotation 2.
  • the steering column 1 is provided with an external thread 3, which is guided in a fixed internal thread 4, so that there is an axial displacement according to arrow 6 during a rotation according to arrow 5.
  • 7 designates the measurement object, the end face 8 of which carries magnetic, optical or magneto-optical structures which can be detected by the chip 9.
  • 7 denotes a first position of the measurement object and 7 ′ denotes a second position.
  • the chip 9 has, for example, a plurality of sensors distributed over a circle traversed by the axis of rotation 2 of the measurement object 7, Hall sensors being able to be used as sensors, for example, so that the signal curve of the sensor arrangement shown in FIG.
  • the signal 10 is sinusoidal, with the rotation of the measurement object 7 in the direction of arrow 5 resulting in a shift of the sinusoidal signal 10 corresponding to arrow 11, so that each angle of rotation of the measurement object within one Range of 0 to 360 ° can be uniquely assigned a phase position of the signal 10.
  • signal 10 results at a rotation angle of 0 ° and signal 10 'at a rotation position of 60 °.
  • the amplitude of the signal 10 is additionally evaluated. Basically, depending on the axial distance of the measurement object 7 from the sensor arrangement, this results in a sinusoidal signal with different amplitudes, as shown on the basis of curves 10 and 12.
  • FIG. Fig. 2a shows schematically a rotary
  • Push button 13 which can be rotated relative to the fixed chip 14 independently of one another according to arrow 15 and pressed or pulled according to arrow 16.
  • 2b shows the rotary and push button in a side view and the displacement positions 13, 13 'and 13' 'are shown.
  • the signals shown in FIG. 2c result, the switch position 13 being the signal
  • Switch position 13 '' corresponds to signal 17 ''.
  • the phase position of the signal is also evaluated in order to determine the respective rotational position of the

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  • 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 système de mesure pour déterminer sans contact l'angle de rotation et la position axiale d'un objet de mesure. Des structures magnétiques, optiques ou magnétooptiques sont disposées sur l'objet de mesure et au moins un capteur est utilisé pour détecter ces structures. Ce système se caractérise en ce que lesdites structures sont disposées sur la face frontale (8) de l'objet de mesure (7) perpendiculairement à ou à l'extérieur de l'axe de rotation (2) dudit objet de mesure (7), au moins une puce (9) comprenant au moins un capteur étant disposée à une certaine distance de la face frontale (8) dans un plan traversé par l'axe de rotation (2) pour déterminer la position de rotation et la distance axiale.
PCT/AT2002/000204 2001-07-13 2002-07-12 Systeme de mesure pour determiner sans contact l'angle de rotation et la position axiale d'un objet de mesure WO2003008911A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0056201U AT6056U1 (de) 2001-07-13 2001-07-13 Messanordnung zum berührungslosen erfassen des drehwinkels und der axialen lage eines messobjektes
ATGM562/01 2001-07-13

Publications (1)

Publication Number Publication Date
WO2003008911A1 true WO2003008911A1 (fr) 2003-01-30

Family

ID=3493877

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2002/000204 WO2003008911A1 (fr) 2001-07-13 2002-07-12 Systeme de mesure pour determiner sans contact l'angle de rotation et la position axiale d'un objet de mesure

Country Status (2)

Country Link
AT (1) AT6056U1 (fr)
WO (1) WO2003008911A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1818652A1 (fr) * 2006-02-14 2007-08-15 Teleflex Automotive France SA Detection en continu de la position d'un element mobile dans un systeme de changement de rapport de transmission
DE102006020887A1 (de) * 2006-05-05 2007-11-08 Preisser Messtechnik Gmbh Handgeführtes Winkel- oder Gradmessgerät
EP2163854A1 (fr) * 2008-09-12 2010-03-17 Austriamicrosystems AG Agencement de capteurs et procédé de mesure
US8552675B2 (en) 2008-10-03 2013-10-08 Nidec Corporation Motor
WO2023203171A1 (fr) * 2022-04-21 2023-10-26 Igus Gmbh Codeur rotatif

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143328A (en) * 1983-06-24 1985-02-06 Penny & Giles Potentionmeters Rotary direction transmitters using three Hall effect devices
EP0566923A1 (fr) * 1992-04-24 1993-10-27 WILO GmbH Dispositif pour mesurer sans contact la position axiale d'un objet tournant
DE19520299A1 (de) * 1995-06-02 1996-12-05 Bosch Gmbh Robert Einrichtung zur Lageerkennung
EP0800055A1 (fr) * 1996-04-03 1997-10-08 Sagem Sa Capteur de positions linéaire et angulaire
EP1202025A2 (fr) * 2000-10-23 2002-05-02 Austriamicrosystems AG Dispositif de mesure d'angles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2143328A (en) * 1983-06-24 1985-02-06 Penny & Giles Potentionmeters Rotary direction transmitters using three Hall effect devices
EP0566923A1 (fr) * 1992-04-24 1993-10-27 WILO GmbH Dispositif pour mesurer sans contact la position axiale d'un objet tournant
DE19520299A1 (de) * 1995-06-02 1996-12-05 Bosch Gmbh Robert Einrichtung zur Lageerkennung
EP0800055A1 (fr) * 1996-04-03 1997-10-08 Sagem Sa Capteur de positions linéaire et angulaire
EP1202025A2 (fr) * 2000-10-23 2002-05-02 Austriamicrosystems AG Dispositif de mesure d'angles

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1818652A1 (fr) * 2006-02-14 2007-08-15 Teleflex Automotive France SA Detection en continu de la position d'un element mobile dans un systeme de changement de rapport de transmission
FR2897425A1 (fr) * 2006-02-14 2007-08-17 Teleflex Automotive France Sa Detection en continu de la position d'un element mobile dans un systeme de changement de rapport de transmission
US7400138B2 (en) 2006-02-14 2008-07-15 Teleflex Automotive France Sa Continuously detecting the position of a moving element in a transmission ratio changer system
DE102006020887A1 (de) * 2006-05-05 2007-11-08 Preisser Messtechnik Gmbh Handgeführtes Winkel- oder Gradmessgerät
EP2163854A1 (fr) * 2008-09-12 2010-03-17 Austriamicrosystems AG Agencement de capteurs et procédé de mesure
US8552675B2 (en) 2008-10-03 2013-10-08 Nidec Corporation Motor
WO2023203171A1 (fr) * 2022-04-21 2023-10-26 Igus Gmbh Codeur rotatif

Also Published As

Publication number Publication date
AT6056U1 (de) 2003-03-25

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