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WO1999008263A1 - Appareil et procede de traitement de flux magnetique - Google Patents

Appareil et procede de traitement de flux magnetique Download PDF

Info

Publication number
WO1999008263A1
WO1999008263A1 PCT/US1998/016639 US9816639W WO9908263A1 WO 1999008263 A1 WO1999008263 A1 WO 1999008263A1 US 9816639 W US9816639 W US 9816639W WO 9908263 A1 WO9908263 A1 WO 9908263A1
Authority
WO
WIPO (PCT)
Prior art keywords
gmr
circuit
bridge
magnetic field
electronic circuit
Prior art date
Application number
PCT/US1998/016639
Other languages
English (en)
Inventor
Jerry J. Conley
Gary B. Mortensen
Original Assignee
Itron, Inc.
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 Itron, Inc. filed Critical Itron, Inc.
Priority to AU89025/98A priority Critical patent/AU8902598A/en
Publication of WO1999008263A1 publication Critical patent/WO1999008263A1/fr

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
    • G01R33/09—Magnetoresistive devices
    • G01R33/093—Magnetoresistive devices using multilayer structures, e.g. giant magnetoresistance sensors

Definitions

  • This ratio can be as high as 10% for trilayer systems and more than 20% for multilayer systems. This is in comparison to magnetoresistive ratios of 2-4% thus indicating the improved sensitivity of GMR materials.
  • GMR amplifier 30 can be combined with magnetic coupler 20. Note, that while the above embodiment utilizes a permanent magnet as field generating means 312 numerous other field generating means may be used without departing from the spirit or scope of the invention.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Nanotechnology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

La présente invention concerne des procédés et des appareils associés à l'utilisation de matériaux 'GMR' ou 'Giant Magneto Resistive materials' = 'matériaux à magnétorésistance géante' (206) et à la polarisation du matériau GMR (206) dans la zone de l'effet Barkhausen. En particulier, la présente invention utilise un pont GMR (204) pour détecter et surveiller le flux magnétique (214) changeant, de manière que la détection et le traitement de signaux puissent se faire en fonction des changements de densité de flux magnétique (214). Lorsque les matériaux GMR (206) dans le pont GMR (204) sont dirigés par un générateur (210) de champ électrique pour qu'elles entrent dans la zone de l'effet Barkhausen, le matériau GMR (206) devient particulièrement sensible aux changements de flux (214), de sorte qu'un petit changement de flux (214) peut entraîner un grand changement à la sortie du pont GMR (204). Parmi les divers dispositifs de l'invention qui profitent des avantages des matériaux GMR (206) et de l'effet Barkhausen, on trouve notamment un coupleur magnétique (20), un amplificateur, un multiplicateur de fréquence, un indicateur vitesse/position et un oscillateur réglable.
PCT/US1998/016639 1997-08-12 1998-08-11 Appareil et procede de traitement de flux magnetique WO1999008263A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU89025/98A AU8902598A (en) 1997-08-12 1998-08-11 Method and apparatus for use of magnetic flux in electronic and signal processi ng systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5568697P 1997-08-12 1997-08-12
US60/055,686 1997-08-12

Publications (1)

Publication Number Publication Date
WO1999008263A1 true WO1999008263A1 (fr) 1999-02-18

Family

ID=21999521

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/016639 WO1999008263A1 (fr) 1997-08-12 1998-08-11 Appareil et procede de traitement de flux magnetique

Country Status (2)

Country Link
AU (1) AU8902598A (fr)
WO (1) WO1999008263A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2382876A (en) * 2001-12-10 2003-06-11 Innovision Res & Tech Plc Detectable component and corresponding detection apparatus
EP1052773A3 (fr) * 1999-05-12 2004-06-30 Siemens Aktiengesellschaft Circuit de commutation intégré servant à la génération d'un signal de commande pour un transistor bipolaire à grille isolée (IGBT)
EP1370884A4 (fr) * 2001-03-23 2004-08-25 Integrated Magnetoelectronics Circuit echantillonneur-bloqueur transpinoriel et applications associees
WO2006092240A1 (fr) * 2005-02-28 2006-09-08 Giesecke & Devrient Gmbh Procede et dispositif pour mesurer des proprietes magnetiques d'un document
GB2446450A (en) * 2007-02-07 2008-08-13 John Davidson Hunter Balanced line signal linear amplitude modulator using a magnetic resistance bridge sensor
US7469838B2 (en) 2001-12-10 2008-12-30 Brewster Kaleidoscope Llc Detectable components and detection apparatus for detecting such components

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280158A (en) * 1978-06-19 1981-07-21 U.S. Philips Corporation Magnetoresistive reading head
US5545885A (en) * 1992-06-01 1996-08-13 Eastman Kodak Company Method and apparatus for detecting and identifying coded magnetic patterns on genuine articles such as bank notes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280158A (en) * 1978-06-19 1981-07-21 U.S. Philips Corporation Magnetoresistive reading head
US5545885A (en) * 1992-06-01 1996-08-13 Eastman Kodak Company Method and apparatus for detecting and identifying coded magnetic patterns on genuine articles such as bank notes

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1052773A3 (fr) * 1999-05-12 2004-06-30 Siemens Aktiengesellschaft Circuit de commutation intégré servant à la génération d'un signal de commande pour un transistor bipolaire à grille isolée (IGBT)
EP1370884A4 (fr) * 2001-03-23 2004-08-25 Integrated Magnetoelectronics Circuit echantillonneur-bloqueur transpinoriel et applications associees
EP1371100A4 (fr) * 2001-03-23 2004-09-01 Integrated Magnetoelectronics Commutateur a dispositif a semi-conducteur entierement metallique et applications de ce dernier
GB2382876A (en) * 2001-12-10 2003-06-11 Innovision Res & Tech Plc Detectable component and corresponding detection apparatus
GB2420861A (en) * 2001-12-10 2006-06-07 Innovision Res & Tech Plc Frequency doubler for a detectable component
GB2382876B (en) * 2001-12-10 2006-06-07 Innovision Res & Tech Plc Detectable components and detection apparatus for detecting such components
GB2420861B (en) * 2001-12-10 2006-07-19 Innovision Res & Tech Plc A frequency doubling device
US7469838B2 (en) 2001-12-10 2008-12-30 Brewster Kaleidoscope Llc Detectable components and detection apparatus for detecting such components
WO2006092240A1 (fr) * 2005-02-28 2006-09-08 Giesecke & Devrient Gmbh Procede et dispositif pour mesurer des proprietes magnetiques d'un document
GB2446450A (en) * 2007-02-07 2008-08-13 John Davidson Hunter Balanced line signal linear amplitude modulator using a magnetic resistance bridge sensor

Also Published As

Publication number Publication date
AU8902598A (en) 1999-03-01

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