MY128316A - Eddy current measuring device - Google Patents

Eddy current measuring device

Info

Publication number
MY128316A
MY128316A MYPI9705980A MY128316A MY 128316 A MY128316 A MY 128316A MY PI9705980 A MYPI9705980 A MY PI9705980A MY 128316 A MY128316 A MY 128316A
Authority
MY
Malaysia
Prior art keywords
permanent magnet
eddy current
magnetized
measuring device
indicator
Prior art date
Application number
Inventor
Klaus-Jurgen Neidhardt
Original Assignee
Mannesmann Vdo 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 Mannesmann Vdo Ag filed Critical Mannesmann Vdo Ag
Publication of MY128316A publication Critical patent/MY128316A/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
    • 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
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets

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)
  • Measuring Magnetic Variables (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Abstract

AN EDDY CURRENT MEASURING DEVICE FOR A SPEED INDICATOR HAS A RADIALLY MAGNETIZED PERMANENT MAGNET (4) AND A SECOND AXIALLY MAGNETIZED PERMANENT MAGNET (8). THE RADIALLY MAGNETIZED PERMANENT MAGNET (4) SERVES TO GENERATE EDDY CURRENTS IN AN EDDY CURRENT BODY (2), WHICH CONTROLS THE EXCURSION OF AN INDICATOR (7) ATTACHED TO AN INDICATOR SHAFT (1). THE SECOND, AXIALLY MAGNETIZED, PERMANENT MAGNET (8) IS POSITIONED VIS-A-VIS A FIXED HALL ELEMENT (10) AT A MINIMUM DISTANCE FROM IT. TO GENERATE A PARTICULARLY STRONG MAGNETIC FIELD, THE PERMANENT MAGNET (4) OF THE EDDY CURRENT (2) IS DIAMETRICALLY MAGNETIZED. THE SECOND PERMANENT MAGNET (8) HAS SEVERAL MAGNETIC POLE PAIRS AND FACILITATES A HIGH RESOLUTION OF THE ANGLE OF ROTATION OF A DRIVE SHAFT (3).(FIGURE 1)
MYPI9705980 1996-12-14 1997-12-11 Eddy current measuring device MY128316A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996152082 DE19652082A1 (en) 1996-12-14 1996-12-14 Eddy current measuring device

Publications (1)

Publication Number Publication Date
MY128316A true MY128316A (en) 2007-01-31

Family

ID=7814726

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI9705980 MY128316A (en) 1996-12-14 1997-12-11 Eddy current measuring device

Country Status (7)

Country Link
JP (1) JP2001506755A (en)
KR (1) KR100733162B1 (en)
CN (1) CN1120374C (en)
BR (1) BR9714011A (en)
DE (1) DE19652082A1 (en)
MY (1) MY128316A (en)
WO (1) WO1998027436A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050035251A (en) * 2002-08-01 2005-04-15 젠트론 아크티엔게젤샤프트 Magnetic field sensor and method for operating said magnetic field sensor
JP2004219383A (en) * 2003-01-17 2004-08-05 Central Japan Railway Co Wheel speed detection system
DE102006047896A1 (en) * 2006-10-10 2008-04-17 Volkswagen Ag Displaying device for instrument cluster of motor vehicle, has magnetofluid arranged between indicator device and stationary part of displaying device, where magnetic field holds magnetofluid that dampens oscillations of displaying device
US20150035517A1 (en) * 2013-07-30 2015-02-05 Delphi Technologies, Inc. Vehicle instrument panel with magnet equipped pointer
US10459115B2 (en) * 2015-03-25 2019-10-29 Daniel Rudolph Krugel Method and device for detecting a material
KR20230053391A (en) 2021-10-14 2023-04-21 현대자동차주식회사 Appatus and method for measuring eddy current loss of magnet

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT8053356V0 (en) * 1980-07-03 1980-07-03 Borletti Spa IMPROVEMENT OF A SPEEDOMETER DEVICE DRIVEN BY AN ELECTRIC MOTOR
KR0108468Y1 (en) * 1993-07-26 1995-02-18 Jung Young Choon Brushless dc motor
DE4339599A1 (en) 1993-11-20 1995-06-01 Vdo Schindling Eddy current operated measuring mechanism for vehicle tachometer
DE4440214C2 (en) * 1994-11-10 1997-08-14 Itt Ind Gmbh Deutsche Encoder with Hall sensors

Also Published As

Publication number Publication date
KR20000057320A (en) 2000-09-15
DE19652082A1 (en) 1998-06-18
WO1998027436A1 (en) 1998-06-25
CN1240513A (en) 2000-01-05
CN1120374C (en) 2003-09-03
KR100733162B1 (en) 2007-06-27
BR9714011A (en) 2000-05-09
JP2001506755A (en) 2001-05-22

Similar Documents

Publication Publication Date Title
TW271467B (en)
EP1467184A3 (en) Angular position detector
JPS60261350A (en) Angular position detector of rotary electronic machine rotorby electronic switching
TW260750B (en)
CA2337920A1 (en) Accurate rotor position sensor, method using magnet ring and linear output hall effect sensors
JPH11514747A (en) Measuring device for detecting rotation angle without contact
AU5796998A (en) Permanent magnet generator for providing alternating current which has a selected frequency
JPH08136558A (en) Rotational speed detector
EP0909962B1 (en) Pulse signal generation method and apparatus
US6598490B2 (en) Apparatus for contact-less measuring the value of a difference angle between two parts rotating about a common axis
KR830008176A (en) DC generator-type non-contact speed detection device
CA2048750A1 (en) Shaft position sensor employing a wiegand-effect device
MY128316A (en) Eddy current measuring device
KR910001782B1 (en) Arrangement and circuit for the electrical commutation of field windings
US4493643A (en) Dental handpiece having non-contact rotational speed detection device
EP0191223A2 (en) Magnetically-coupled transducer means
JPH05244754A (en) Magnetizing method for motor with rotation detecting device
GB1416925A (en) Magnetic-field-sensing apparatus
GB1433561A (en) Electromagnetic rotational positioning device
USH939H (en) Commutator pulse tachometer
GB1103644A (en) Improvements in and relating to velocity measuring apparatus
JPS6453114A (en) Multiple rotation detecting device
JPS54121914A (en) Dc brushless motor
SU715946A1 (en) Magnetic modulation transducer for investigating anysotropy
SU847452A1 (en) Thyratron electric motor