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WO2008043421A3 - Magnet-based rotary transducer - Google Patents

Magnet-based rotary transducer Download PDF

Info

Publication number
WO2008043421A3
WO2008043421A3 PCT/EP2007/008046 EP2007008046W WO2008043421A3 WO 2008043421 A3 WO2008043421 A3 WO 2008043421A3 EP 2007008046 W EP2007008046 W EP 2007008046W WO 2008043421 A3 WO2008043421 A3 WO 2008043421A3
Authority
WO
WIPO (PCT)
Prior art keywords
axis
magnetic field
type
magnet
disk
Prior art date
Application number
PCT/EP2007/008046
Other languages
German (de)
French (fr)
Other versions
WO2008043421A2 (en
Inventor
Frank Wolff
Jochen Schmitt
Franz Jost
Original Assignee
Sensitec Gmbh
Levitec Gmbh
Frank Wolff
Jochen Schmitt
Franz Jost
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 Sensitec Gmbh, Levitec Gmbh, Frank Wolff, Jochen Schmitt, Franz Jost filed Critical Sensitec Gmbh
Publication of WO2008043421A2 publication Critical patent/WO2008043421A2/en
Publication of WO2008043421A3 publication Critical patent/WO2008043421A3/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
    • G01D5/142—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
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
    • G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
    • G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
    • G01L3/104—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving permanent magnets
    • 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
    • G01D2205/40—Position sensors comprising arrangements for concentrating or redirecting magnetic flux

Landscapes

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

Abstract

The invention relates to a magnet-based rotary transducer comprising a first disk-type or ring-type structure and a second disk-type or ring-type structure which are oriented along an axis, extend along or parallel to a common plane, in a radial direction relative to said axis, are disposed at a distance from one another, and can be rotated relative to each other. The first structure encompasses at least two magnet poles that are used for generating a magnetic field and run perpendicular to the axis. The second structure is composed of at least two segments which are placed on a common plane, perpendicular to the axis, are made of a ferromagnetic material, and are used for conducting and concentrating a magnetic field generated by the first structure. Said segments define at least two material gaps in such a way that the local magnetic fields extending there are out of phase with each other. One respective magnetic field-sensitive sensor is positioned inside or near at least one of said two material gaps in order to measure the local magnetic field.
PCT/EP2007/008046 2006-10-12 2007-09-15 Magnet-based rotary transducer WO2008043421A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006048771A DE102006048771A1 (en) 2006-10-12 2006-10-12 Encoders on a magnetic basis
DE102006048771.0 2006-10-12

Publications (2)

Publication Number Publication Date
WO2008043421A2 WO2008043421A2 (en) 2008-04-17
WO2008043421A3 true WO2008043421A3 (en) 2008-10-02

Family

ID=38904808

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/008046 WO2008043421A2 (en) 2006-10-12 2007-09-15 Magnet-based rotary transducer

Country Status (2)

Country Link
DE (1) DE102006048771A1 (en)
WO (1) WO2008043421A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010082086A1 (en) * 2009-01-13 2010-07-22 Aktiebolaget Skf Absolute rotation angle sensing device, electric power assisted steering system comprising such a rotation angle sensing device and method for sensing an absolute angle
CN101877526B (en) * 2009-04-30 2012-10-31 浙江中科德润科技有限公司 Electric motor
CN101877525B (en) * 2009-04-30 2013-01-30 浙江中科德润科技有限公司 Electric motor
US9841296B2 (en) 2010-05-05 2017-12-12 Continental Automotive Systems, Inc. Rotary arc position sensor with linear output
DE102010020599A1 (en) 2010-05-14 2011-11-17 Trw Automotive Gmbh Sensor assembly for motor vehicle steering systems
DE102019109970A1 (en) 2019-04-16 2020-10-22 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Sensor device for a vehicle, method for producing a sensor device for a vehicle, method for operating a sensor device for a vehicle and sensor system for a vehicle
MX2022015568A (en) * 2020-06-24 2023-04-03 Motus Labs Llc Magnetic field detection apparatus, system, and method.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1154238A2 (en) * 2000-05-13 2001-11-14 AB Elektronik GmbH Angular position sensor
FR2809808A1 (en) * 2000-06-06 2001-12-07 Moving Magnet Tech Position sensor for e.g. brake pedal, has moving permanent magnet in air gap between two ferromagnetic assemblies, each assembly being split into two with magneto-sensitive elements located in the secondary air gaps
EP1223409A2 (en) * 2001-01-10 2002-07-17 Hitachi, Ltd. Non-contact position sensor
DE102004001837A1 (en) * 2003-01-14 2004-07-22 Denso Corp., Kariya Angular position sensor that works to measure a highly linear magnetic flux density
US20060208726A1 (en) * 2005-03-21 2006-09-21 Hr Textron, Inc. Position sensing for moveable mechanical systems and associated methods and apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1154238A2 (en) * 2000-05-13 2001-11-14 AB Elektronik GmbH Angular position sensor
FR2809808A1 (en) * 2000-06-06 2001-12-07 Moving Magnet Tech Position sensor for e.g. brake pedal, has moving permanent magnet in air gap between two ferromagnetic assemblies, each assembly being split into two with magneto-sensitive elements located in the secondary air gaps
EP1223409A2 (en) * 2001-01-10 2002-07-17 Hitachi, Ltd. Non-contact position sensor
DE102004001837A1 (en) * 2003-01-14 2004-07-22 Denso Corp., Kariya Angular position sensor that works to measure a highly linear magnetic flux density
US20060208726A1 (en) * 2005-03-21 2006-09-21 Hr Textron, Inc. Position sensing for moveable mechanical systems and associated methods and apparatus

Also Published As

Publication number Publication date
DE102006048771A1 (en) 2008-04-17
WO2008043421A2 (en) 2008-04-17

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