FI896339A0 - Frekvensdifferentierande digitalkompass och magnetometer. - Google Patents

Frekvensdifferentierande digitalkompass och magnetometer.

Info

Publication number
FI896339A0
FI896339A0 FI896339A FI896339A FI896339A0 FI 896339 A0 FI896339 A0 FI 896339A0 FI 896339 A FI896339 A FI 896339A FI 896339 A FI896339 A FI 896339A FI 896339 A0 FI896339 A0 FI 896339A0
Authority
FI
Finland
Prior art keywords
sensing coil
digital compass
magnetometer
sensing
earth
Prior art date
Application number
FI896339A
Other languages
English (en)
Finnish (fi)
Inventor
Nam Hoon Kim
Timothy Hawks
Original Assignee
Precision Navigation 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 Precision Navigation Inc filed Critical Precision Navigation Inc
Publication of FI896339A0 publication Critical patent/FI896339A0/fi

Links

Classifications

    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
    • G01C17/02—Magnetic compasses
    • G01C17/28—Electromagnetic compasses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • Measuring Magnetic Variables (AREA)
  • Networks Using Active Elements (AREA)
  • Hall/Mr Elements (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Geophysics And Detection Of Objects (AREA)
FI896339A 1987-07-02 1989-12-29 Frekvensdifferentierande digitalkompass och magnetometer. FI896339A0 (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/069,495 US4851775A (en) 1987-07-02 1987-07-02 Digital compass and magnetometer having a sensor coil wound on a high permeability isotropic core
PCT/US1988/002191 WO1989000297A1 (fr) 1987-07-02 1988-06-30 Boussole numerique et magnetometre a difference de frequence

Publications (1)

Publication Number Publication Date
FI896339A0 true FI896339A0 (fi) 1989-12-29

Family

ID=22089373

Family Applications (1)

Application Number Title Priority Date Filing Date
FI896339A FI896339A0 (fi) 1987-07-02 1989-12-29 Frekvensdifferentierande digitalkompass och magnetometer.

Country Status (9)

Country Link
US (1) US4851775A (fr)
EP (1) EP0376977B1 (fr)
JP (1) JP2934446B2 (fr)
AT (1) ATE134773T1 (fr)
AU (1) AU603529B2 (fr)
CA (1) CA1289621C (fr)
DE (1) DE3855048T2 (fr)
FI (1) FI896339A0 (fr)
WO (1) WO1989000297A1 (fr)

Families Citing this family (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5270648A (en) * 1990-08-10 1993-12-14 Watson Industries, Inc. Single core triaxial flux-gate magnetometer
US5329269A (en) * 1990-08-10 1994-07-12 Watson William S Single core triaxial flux-gate magnetometer
US5245496A (en) * 1991-08-16 1993-09-14 Kim Nam H Self-programming non-invasive motor overload prevention system
DE4136451A1 (de) * 1991-11-06 1993-05-13 Mannesmann Kienzle Gmbh Richtungsaenderungssensor fuer kraftfahrzeuge
US5239264A (en) * 1991-11-14 1993-08-24 Precision Navigation, Inc. Zero-offset magnetometer having coil and core sensor controlling period of an oscillator circuit
JPH05288818A (ja) * 1992-04-06 1993-11-05 Seiko Instr Inc 三次元積分磁束計
US5526022A (en) 1993-01-06 1996-06-11 Virtual I/O, Inc. Sourceless orientation sensor
US5642046A (en) * 1994-06-08 1997-06-24 Magknowledge Inc. Low power magnetometer circuits requiring a single switching cycle
US5991085A (en) 1995-04-21 1999-11-23 I-O Display Systems Llc Head-mounted personal visual display apparatus with image generator and holder
JPH09152473A (ja) * 1995-09-29 1997-06-10 Sony Corp 磁気探知装置
US5878370A (en) * 1995-12-01 1999-03-02 Prince Corporation Vehicle compass system with variable resolution
US5924212A (en) * 1996-10-09 1999-07-20 Donnelly Corporation Electronic compass
US5748108A (en) * 1997-01-10 1998-05-05 Nu-Metrics, Inc. Method and apparatus for analyzing traffic and a sensor therefor
US6130505A (en) * 1997-01-16 2000-10-10 Display Laboratories, Inc. Automatic alignment of cathode ray tube video displays in local magnetic fields
US6084406A (en) * 1997-04-01 2000-07-04 Precision Navigation, Inc. Half-cycle saturable-core magnetometer circuit
US6587573B1 (en) 2000-03-20 2003-07-01 Gentex Corporation System for controlling exterior vehicle lights
US6239596B1 (en) 1997-06-09 2001-05-29 Joseph J. Stupak, Jr. Total magnetic flux measuring device
US6056554A (en) * 1998-09-09 2000-05-02 Samole; Sidney Apparatus and method for finding and identifying nighttime sky objects
KR100296301B1 (ko) * 1998-11-19 2001-08-07 구자홍 모니터의지자계자동보정장치
JP3559459B2 (ja) * 1998-12-14 2004-09-02 株式会社東芝 磁界センサ
US6512370B1 (en) 1999-02-12 2003-01-28 Elf Engineering, Ltd. Low power, frequency-mode magnetometer
US6301794B1 (en) * 1999-05-27 2001-10-16 Johnson Controls, Inc. Vehicle compass system with continuous automatic calibration
GB9928682D0 (en) * 1999-12-06 2000-02-02 Electrotextiles Comp Ltd Input apparatus and a method of generating control signals
US6353798B1 (en) * 2000-04-10 2002-03-05 Trimble Navigation Limited Integrated position and direction system with three-sensor digital compass
US6349263B1 (en) * 2000-04-10 2002-02-19 Trimble Navigation Limited Integrated position and direction system
US6760678B1 (en) 2000-04-11 2004-07-06 Electronics Tomorrow Limited Electronic compass
US6529828B1 (en) * 2000-07-12 2003-03-04 Trimble Navigation Limited Integrated position and direction system with map display oriented according to heading or direction
US6430505B1 (en) * 2000-07-12 2002-08-06 Trimble Navigation Limited Automatic charting of obstructions for mission planning
JP4800557B2 (ja) * 2000-08-12 2011-10-26 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 方形波パルスを形成するための回路装置
US6516527B1 (en) 2000-11-03 2003-02-11 Hiro Moriyasu Inclinometer
US6653831B2 (en) 2001-11-20 2003-11-25 Gentex Corporation Magnetometer having a dynamically adjustable bias setting and electronic vehicle compass incorporating the same
US7149627B2 (en) * 2002-03-01 2006-12-12 Gentex Corporation Electronic compass system
US6968273B2 (en) 2002-03-01 2005-11-22 Gentex Corporation Electronic compass system
US7239944B2 (en) * 2002-03-28 2007-07-03 Dean Jason A Programmable lawn mower
US8983776B2 (en) * 2002-03-28 2015-03-17 Jason A. Dean Programmable robotic apparatus
WO2003083594A1 (fr) * 2002-03-28 2003-10-09 Jason Dean Tondeuse a gazon programmable
US7103457B2 (en) * 2002-03-28 2006-09-05 Dean Technologies, Inc. Programmable lawn mower
US6813582B2 (en) * 2002-07-31 2004-11-02 Point Research Corporation Navigation device for personnel on foot
US6842991B2 (en) * 2002-07-31 2005-01-18 Robert W. Levi Gyro aided magnetic compass
US7103471B2 (en) 2002-09-20 2006-09-05 Honeywell International Inc. Multi-mode navigation device and method
JP4709744B2 (ja) * 2003-02-24 2011-06-22 ジェンテックス コーポレイション 電子コンパスシステム
US20050116801A1 (en) * 2003-03-07 2005-06-02 Proehl Gregory L. Sensor coil and method of manufacturing same
EP1678464A2 (fr) * 2003-10-07 2006-07-12 Quantum Applied Science and Research, Inc. Systeme de capteurs pour mesurer une ou plusieurs composantes de vecteur d'un champ electrique
US6971181B2 (en) * 2004-02-09 2005-12-06 Bell Automotive Products, Inc. Digital display compass for mounting on vehicle rear view mirror
US7300367B1 (en) 2005-01-20 2007-11-27 General Welding And Fabricating, Inc. System for tracking wild game
US7145321B2 (en) 2005-02-25 2006-12-05 Sandquist David A Current sensor with magnetic toroid
US7451549B1 (en) 2006-08-09 2008-11-18 Pni Corporation Automatic calibration of a three-axis magnetic compass
US7826999B1 (en) 2007-08-20 2010-11-02 Pni Corporation Magnetic tilt compensated heading compass with adaptive zoffset
US7755349B2 (en) * 2008-03-03 2010-07-13 Memsic, Inc. Correcting offset in magneto-resistive devices
US7581326B1 (en) 2008-12-31 2009-09-01 Lockheed Martin Corporation Optical solid-state heading sensor
WO2011159388A1 (fr) 2010-04-01 2011-12-22 Johnson Controls Technology Company Magnétomètre
JP5625525B2 (ja) * 2010-06-18 2014-11-19 富士電機株式会社 電流検知装置
JP5702592B2 (ja) * 2010-12-14 2015-04-15 富士電機株式会社 電流検知装置
JP2012233718A (ja) * 2011-04-28 2012-11-29 Fuji Electric Fa Components & Systems Co Ltd 電流検出装置
US9035648B2 (en) 2011-07-05 2015-05-19 PNI Sensor Corporation Magnetic sensor characterization
US9459276B2 (en) 2012-01-06 2016-10-04 Sensor Platforms, Inc. System and method for device self-calibration
WO2013104006A2 (fr) 2012-01-08 2013-07-11 Sensor Platforms, Inc. Système et procédé pour étalonner des capteurs pour différents environnements de fonctionnement
US10036784B2 (en) 2014-11-17 2018-07-31 The United States Of America As Represented By The Administrator Of Nasa Variable permeability magnetometer systems and methods for aerospace applications
CN106324365A (zh) * 2016-09-21 2017-01-11 广东骏丰频谱股份有限公司 舒曼波接收装置
CN110749847B (zh) * 2019-10-14 2021-11-12 清华大学 基于直流偏置磁场的最优直流偏置磁场值的确定方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416072A (en) * 1965-04-19 1968-12-10 Burroughs Corp Thin film magnetometer employing phase shift discrimination
FR2212536B1 (fr) * 1973-01-02 1976-04-09 Crouzet Sa
US4182987A (en) * 1977-09-21 1980-01-08 Eastman Kodak Company Magnetometer employing hard axis thin film inductor
DE2810347C2 (de) * 1978-03-10 1986-04-30 Robert Bosch Gmbh, 7000 Stuttgart Frequenzgenerator
US4305034A (en) * 1979-04-09 1981-12-08 Hughes Aircraft Company Magnetic field intensity measuring device with frequency change indication
DE3029532C2 (de) * 1980-08-04 1982-11-25 Siemens AG, 1000 Berlin und 8000 München Anordnung zur Bestimmung der Feldstärke eines Magnetfeldes

Also Published As

Publication number Publication date
JP2934446B2 (ja) 1999-08-16
ATE134773T1 (de) 1996-03-15
EP0376977B1 (fr) 1996-02-28
CA1289621C (fr) 1991-09-24
WO1989000297A1 (fr) 1989-01-12
DE3855048D1 (de) 1996-04-04
JPH02504072A (ja) 1990-11-22
EP0376977A1 (fr) 1990-07-11
AU603529B2 (en) 1990-11-15
EP0376977A4 (en) 1991-07-17
US4851775A (en) 1989-07-25
AU2319088A (en) 1989-01-30
DE3855048T2 (de) 1996-10-24

Similar Documents

Publication Publication Date Title
FI896339A0 (fi) Frekvensdifferentierande digitalkompass och magnetometer.
DE3683215D1 (de) Messvorrichtung mit einem squid-magnetometer.
ATE92620T1 (de) Schnittstellenschaltung fuer einen linearen veraenderlichen differentialtransformator.
ES8407577A1 (es) Un circuito de control para uso con un detector de campo magnetico accionado electricamente.
DE3785949D1 (de) Apparat und technik zur messung der magnetischen kernresonanz.
DE59108417D1 (de) Vorrichtung zur Prüfung von mit magnetischen Eigenschaften ausgestatteten Messobjekten
DE3864064D1 (de) Induktiver naeherungsschalter.
DE3690329D2 (en) Magnetic field-dependent, inductive proximity switch
ATE63172T1 (de) Sonde fuer ein metallsuchgeraet.
FR2350657A1 (fr) Circuit d'amplification et de polarisation de transducteur electromagnetique
ES8707610A1 (es) Disposicion de sensor
EP0304272A3 (fr) Détecteur de proximité à induction
JPS60135753A (ja) 非接触水分検知装置
FR2352307A1 (fr) Dispositif pour la mesure d'un champ magnetique au moyen d'un magnetometre du type a barreau
JPS57156517A (en) Magnetic scale with graduation
DE59811684D1 (de) Magnetisches Identifizierungselement
SU930184A1 (ru) Устройство дл определени магнитной восприимчивости
ATE154861T1 (de) Annäherungsschalter
JPS5517482A (en) Pedometer
JPS646767A (en) Current detector
FR2425647A1 (fr) Dispositif pour la conversion de l'intensite d'un champ magnetique ou electromagnetique en un signal electrique
SU1038847A1 (ru) Зонд магнитометра
RU2097699C1 (ru) Электронный компас
GB1388875A (en) Magnetic field sensing apparatus
SU848981A1 (ru) Датчик

Legal Events

Date Code Title Description
FD Application lapsed
MM Patent lapsed

Owner name: PRECISION NAVIGATION, INCORPORATED