WO2002042713A3 - Angle measurement by magnetic transducer - Google Patents

Angle measurement by magnetic transducer Download PDF

Info

Publication number
WO2002042713A3
WO2002042713A3 PCT/EP2001/013698 EP0113698W WO0242713A3 WO 2002042713 A3 WO2002042713 A3 WO 2002042713A3 EP 0113698 W EP0113698 W EP 0113698W WO 0242713 A3 WO0242713 A3 WO 0242713A3
Authority
WO
WIPO (PCT)
Prior art keywords
angle
transducer
function
zone
axis
Prior art date
Application number
PCT/EP2001/013698
Other languages
French (fr)
Other versions
WO2002042713A2 (en
Inventor
Lutz Axel May
Original Assignee
Fast Technology Ag
Lutz Axel May
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 Fast Technology Ag, Lutz Axel May filed Critical Fast Technology Ag
Priority to AU2002235739A priority Critical patent/AU2002235739A1/en
Priority to EP01985823A priority patent/EP1409962A2/en
Publication of WO2002042713A2 publication Critical patent/WO2002042713A2/en
Publication of WO2002042713A3 publication Critical patent/WO2002042713A3/en

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
    • G01D5/20—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 by varying inductance, e.g. by a movable armature
    • G01D5/2006—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 by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G01D5/2033—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 by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils controlling the saturation of a magnetic circuit by means of a movable element, e.g. a magnet
    • 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
    • G01D5/14—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
    • G01D5/20—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 by varying inductance, e.g. by a movable armature
    • G01D5/2006—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 by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • 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
    • G01D5/2452—Incremental encoders incorporating two or more tracks having an (n, n+1, ...) relationship
    • 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
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/70—Position sensors comprising a moving target with particular shapes, e.g. of soft magnetic targets
    • G01D2205/73—Targets mounted eccentrically with respect to the axis of rotation
    • 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
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/70—Position sensors comprising a moving target with particular shapes, e.g. of soft magnetic targets
    • G01D2205/77—Specific profiles
    • G01D2205/777—Whorl-shaped profiles

Landscapes

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

Abstract

A magnetic transducer for measuring the angle about an axis (A-A) of a part such as a shaft (10) is constructed to emanate a magnetic field which is detectable by a fixed sensor (30) to produce a signal which is dependent on the angle. The construction may include a transducer element (20) mounted eccentrically with respect to the axis or a magnetically-conductive element having a surface whose radius is a function of angle. Alternatively a part of circular cross-section is given a radial depth of permanent magnetisation which is a function of angle or is provided with a magnetised zone of different magnetic property to the remainder and having a radial depth which is a function of angle. Such a zone may be a case-hardened zone of a steel part. Transducer regions arranged at 90° can be used in resolving ambiguities in the measurement. The transducer region or a magnetically conductive part thereof may provide a cyclic variation of the emanated magnetic field within one revolution of 360°.
PCT/EP2001/013698 2000-11-21 2001-11-21 Angle measurement by magnetic transducer WO2002042713A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002235739A AU2002235739A1 (en) 2000-11-21 2001-11-21 Angle measurement by magnetic transducer
EP01985823A EP1409962A2 (en) 2000-11-21 2001-11-21 Angle measurement by magnetic transducer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0028343.2A GB0028343D0 (en) 2000-11-21 2000-11-21 Angle measurement by magnetic transducer
GB0028343.2 2000-11-21

Publications (2)

Publication Number Publication Date
WO2002042713A2 WO2002042713A2 (en) 2002-05-30
WO2002042713A3 true WO2002042713A3 (en) 2002-08-22

Family

ID=9903564

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/013698 WO2002042713A2 (en) 2000-11-21 2001-11-21 Angle measurement by magnetic transducer

Country Status (4)

Country Link
EP (1) EP1409962A2 (en)
AU (1) AU2002235739A1 (en)
GB (1) GB0028343D0 (en)
WO (1) WO2002042713A2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7685891B2 (en) 2003-12-30 2010-03-30 Nct Engineering Gmbh Magnetic principle based torque sensor
US7019517B2 (en) 2004-07-20 2006-03-28 Honeywell International Inc. Offset magnet rotary position sensor
US8380397B2 (en) 2009-06-19 2013-02-19 Cnh America Llc Off-road vehicle with redundant non-contact multi-revolution angle sensor
DE102010040139A1 (en) * 2010-09-02 2012-03-08 Robert Bosch Gmbh Determining a torque acting on a steering shaft
GB2506698A (en) * 2012-10-02 2014-04-09 Mark Anthony Howard Detector to measure the relative position of bodies
DE102013207621B4 (en) * 2013-04-26 2015-04-09 Schaeffler Technologies AG & Co. KG Angle measurement, in particular contactless, with individual sensors
US10030963B2 (en) 2015-10-01 2018-07-24 Raytheon Company Multidimensional angle determination using fine position sensors
US9869566B2 (en) * 2016-02-12 2018-01-16 Allegro Microsystems, Llc Angle sensing using differential magnetic measurement and a back bias magnet
US11473935B1 (en) 2021-04-16 2022-10-18 Allegro Microsystems, Llc System and related techniques that provide an angle sensor for sensing an angle of rotation of a ferromagnetic screw

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4719419A (en) * 1985-07-15 1988-01-12 Harris Graphics Corporation Apparatus for detecting a rotary position of a shaft
US4746859A (en) * 1986-12-22 1988-05-24 Sundstrand Corporation Power and temperature independent magnetic position sensor for a rotor
US5523679A (en) * 1992-10-01 1996-06-04 Brose Fahrzeugteile Gmbh & Co. Kg Apparatus for detecting speed and direction of rotation with a single magnetic sensor
DE19715991A1 (en) * 1996-08-01 1998-02-05 Kostal Leopold Gmbh & Co Kg Adjustment detector with magnetic sensor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19629611A1 (en) * 1996-07-23 1998-01-29 Grutzeck Christel Plate cam device for controlling magnetic flux sensitive semiconductor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4719419A (en) * 1985-07-15 1988-01-12 Harris Graphics Corporation Apparatus for detecting a rotary position of a shaft
US4746859A (en) * 1986-12-22 1988-05-24 Sundstrand Corporation Power and temperature independent magnetic position sensor for a rotor
US5523679A (en) * 1992-10-01 1996-06-04 Brose Fahrzeugteile Gmbh & Co. Kg Apparatus for detecting speed and direction of rotation with a single magnetic sensor
DE19715991A1 (en) * 1996-08-01 1998-02-05 Kostal Leopold Gmbh & Co Kg Adjustment detector with magnetic sensor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1409962A2 *

Also Published As

Publication number Publication date
GB0028343D0 (en) 2001-01-03
WO2002042713A2 (en) 2002-05-30
AU2002235739A1 (en) 2002-06-03
EP1409962A2 (en) 2004-04-21

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