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BR9714011A - Eddy current measurement mechanism - Google Patents

Eddy current measurement mechanism

Info

Publication number
BR9714011A
BR9714011A BR9714011-2A BR9714011A BR9714011A BR 9714011 A BR9714011 A BR 9714011A BR 9714011 A BR9714011 A BR 9714011A BR 9714011 A BR9714011 A BR 9714011A
Authority
BR
Brazil
Prior art keywords
permanent magnet
eddy current
magnetized
generate
current measurement
Prior art date
Application number
BR9714011-2A
Other languages
Portuguese (pt)
Inventor
Klaus Juergen 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 BR9714011A publication Critical patent/BR9714011A/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
    • G01P3/46—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring amplitude of generated current or voltage
    • G01P3/465—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring amplitude of generated current or voltage by using dynamo-electro tachometers or electric generator
    • 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)
  • Investigating Or Analysing Biological Materials (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

Patente de Invenção: <B>"MECANISMO DE MEDIçãO DE CORRENTES PARASITAS"<D>. Um mecanismo de medição de correntes parasitas para um tacómetro tem um imã permanente (4) magnetizado radialmente e um segundo imã permanente (8) magnetizado axialmente. O imã permanente (4) magnetizado radialmente serve para gerar correntes parasitas num elemento de correntes parasitas (2), o qual movimenta um indicador (7) disposto num eixo indicador (1). O segundo imã permanente (8) magnetizado axialmente fica num espaço reduzido em frente de um elemento Hall (10) fixo. Para se gerar um campo magnético especialmente forte, o imã permanente (4) do elemento de correntes parasitas (2) é magnetizado diametralmente. O segundo imã permanente (8) apresenta vários pares de pólos magnéticos e possibilita uma elevada resolução do ângulo de rotação de um eixo motor (3).Invention Patent: <B> "MECHANISM FOR MEASURING PARASITE CURRENTS" <D>. An eddy current measuring mechanism for a tachometer has a radially magnetized permanent magnet (4) and an axially magnetized second permanent magnet (8). The radially magnetized permanent magnet (4) serves to generate eddy currents in an eddy current element (2), which moves an indicator (7) arranged on an indicator axis (1). The second axially magnetized permanent magnet (8) is located in a reduced space in front of a fixed Hall element (10). To generate an especially strong magnetic field, the permanent magnet (4) of the eddy current element (2) is magnetized diametrically. The second permanent magnet (8) has several pairs of magnetic poles and allows a high resolution of the rotation angle of a driving shaft (3).

BR9714011-2A 1996-12-14 1997-12-04 Eddy current measurement mechanism BR9714011A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1996152082 DE19652082A1 (en) 1996-12-14 1996-12-14 Eddy current measuring device
PCT/EP1997/006772 WO1998027436A1 (en) 1996-12-14 1997-12-04 Instrument for measuring eddy currents

Publications (1)

Publication Number Publication Date
BR9714011A true BR9714011A (en) 2000-05-09

Family

ID=7814726

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9714011-2A BR9714011A (en) 1996-12-14 1997-12-04 Eddy current measurement mechanism

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
WO2004013645A1 (en) * 2002-08-01 2004-02-12 Sentron Ag 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
CA2980257C (en) * 2015-03-25 2023-01-24 Daniel Rudolph KRUGEL A 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
MY128316A (en) 2007-01-31
KR20000057320A (en) 2000-09-15
JP2001506755A (en) 2001-05-22
WO1998027436A1 (en) 1998-06-25
CN1120374C (en) 2003-09-03
DE19652082A1 (en) 1998-06-18
CN1240513A (en) 2000-01-05
KR100733162B1 (en) 2007-06-27

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Legal Events

Date Code Title Description
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: INDEFERIDO COM BASE NO ARTIGO 8O COMBINADO COM O ARTIGO 13 DA LPI

B09T Decision of refusal: decision cancelled [chapter 9.2.1 patent gazette]

Free format text: REFERENTE A RPI 1901 DE 12/06/2007 CODIGO DE DESPACHO: 9.2

B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 22/04/2008, OBSERVADAS AS CONDICOES LEGAIS.

B24C Patent annual fee: request for for restoration

Free format text: REFERENTE A 13A, 14A E 15A ANUIDADE(S), CONFORME ART. 87 DA LPI 9.279.

B21F Lapse acc. art. 78, item iv - on non-payment of the annual fees in time

Free format text: REFERENTE AS 14A, 15A, 16A, 17A E 18A ANUIDADES. PAGAR RESTAURACAO.

B24J Lapse because of non-payment of annual fees (definitively: art 78 iv lpi, resolution 113/2013 art. 12)

Free format text: EM VIRTUDE DA EXTINCAO PUBLICADA NA RPI 2343 DE 01-12-2015 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDA A EXTINCAO DA PATENTE E SEUS CERTIFICADOS, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013.