SE9503690L - Method and apparatus for determining the angular velocity of a rotating cylindrical axis of electrically conductive meter - Google Patents

Method and apparatus for determining the angular velocity of a rotating cylindrical axis of electrically conductive meter

Info

Publication number
SE9503690L
SE9503690L SE9503690A SE9503690A SE9503690L SE 9503690 L SE9503690 L SE 9503690L SE 9503690 A SE9503690 A SE 9503690A SE 9503690 A SE9503690 A SE 9503690A SE 9503690 L SE9503690 L SE 9503690L
Authority
SE
Sweden
Prior art keywords
shaft
angular velocity
magnetic field
determining
electrically conductive
Prior art date
Application number
SE9503690A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9503690D0 (en
Inventor
Johan Hamberg
Original Assignee
Asea Brown Boveri
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 Asea Brown Boveri filed Critical Asea Brown Boveri
Priority to SE9503690A priority Critical patent/SE9503690L/en
Publication of SE9503690D0 publication Critical patent/SE9503690D0/en
Priority to JP9515732A priority patent/JPH11513800A/en
Priority to PCT/SE1996/001167 priority patent/WO1997014968A1/en
Priority to EP96935652A priority patent/EP0888555A1/en
Publication of SE9503690L publication Critical patent/SE9503690L/en

Links

Classifications

    • 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
    • G01P3/49—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents
    • G01P3/495—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents where the indicating means responds to forces produced by the eddy currents and the generating magnetic field
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/003—Kinematic accelerometers, i.e. measuring acceleration in relation to an external reference frame, e.g. Ferratis accelerometers

Abstract

A method and a device for determining the angular velocity of a rotating, electrically conductive cylindrical shaft (1). A homogeneous magnetic field (3) is directed perpendicularly to the shaft in such a way that the magnetic field lines extend in the cross section plane of the shaft, perpendicular to the symmetry line (8) of the shaft. When the shaft is rotating, axial eddy currents are induced in the shaft which outside the shaft also generate a magnetic field of dipole type with a component (6) in the cross section plane of the shaft and perpendicular to the originally applied magnetic field. The magnitude of this component is determined by the angular velocity of the rotating shaft, and a measure of the angular velocity of the shaft is obtained by detecting this component with the aid of a measuring winding (7) in a plane parallel to the homogeneous magnetic field and which passes through the symmetry line of the shaft.
SE9503690A 1995-10-20 1995-10-20 Method and apparatus for determining the angular velocity of a rotating cylindrical axis of electrically conductive meter SE9503690L (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE9503690A SE9503690L (en) 1995-10-20 1995-10-20 Method and apparatus for determining the angular velocity of a rotating cylindrical axis of electrically conductive meter
JP9515732A JPH11513800A (en) 1995-10-20 1996-09-20 Method and apparatus for measuring the angular velocity of a rotating cylindrical shaft made of a conductive material
PCT/SE1996/001167 WO1997014968A1 (en) 1995-10-20 1996-09-20 A method and a device for determining the angular velocity of a rotating cylindrical shaft of electrically conductive material
EP96935652A EP0888555A1 (en) 1995-10-20 1996-09-20 A method and a device for determining the angular velocity of a rotating cylindrical shaft of electrically conductive material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9503690A SE9503690L (en) 1995-10-20 1995-10-20 Method and apparatus for determining the angular velocity of a rotating cylindrical axis of electrically conductive meter

Publications (2)

Publication Number Publication Date
SE9503690D0 SE9503690D0 (en) 1995-10-20
SE9503690L true SE9503690L (en) 1997-04-21

Family

ID=20399900

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9503690A SE9503690L (en) 1995-10-20 1995-10-20 Method and apparatus for determining the angular velocity of a rotating cylindrical axis of electrically conductive meter

Country Status (4)

Country Link
EP (1) EP0888555A1 (en)
JP (1) JPH11513800A (en)
SE (1) SE9503690L (en)
WO (1) WO1997014968A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6992476B2 (en) 2001-05-11 2006-01-31 Siemens Aktiengesellschaft Transmitter system for a ferraris motion transmitter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1673439A1 (en) * 1967-06-19 1971-04-29 Trenkler Gerhard Dipl Ing Eddy current speedometer with constant field excitation
US3932813A (en) * 1972-04-20 1976-01-13 Simmonds Precision Products, Inc. Eddy current sensor
US4441077A (en) * 1981-11-23 1984-04-03 International Business Machines Real time eddy current responsive Hall effect device tachometer
US4406168A (en) * 1982-03-30 1983-09-27 Borg-Warner Corporation System for measuring torque and/or speed of rotating shaft
US4479390A (en) * 1983-01-28 1984-10-30 Borg-Warner Corporation Transducer for measuring torque and/or speed of rotating shaft
DE3314567C1 (en) * 1983-04-22 1984-05-03 Jiri Dipl.-Ing. 5100 Aachen Sobota Sensor for measuring angular acceleration on rapidly rotating shafts
US4751459A (en) * 1986-09-18 1988-06-14 Synektron Corporation Magnetic tachometer or accelerometer having highly permeable eddy current flux circuit

Also Published As

Publication number Publication date
EP0888555A1 (en) 1999-01-07
SE9503690D0 (en) 1995-10-20
WO1997014968A1 (en) 1997-04-24
JPH11513800A (en) 1999-11-24

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