GB1285832A - Digital compass - Google Patents

Digital compass

Info

Publication number
GB1285832A
GB1285832A GB3475/70A GB347570A GB1285832A GB 1285832 A GB1285832 A GB 1285832A GB 3475/70 A GB3475/70 A GB 3475/70A GB 347570 A GB347570 A GB 347570A GB 1285832 A GB1285832 A GB 1285832A
Authority
GB
United Kingdom
Prior art keywords
pulse
revolution
sensor
field
memory
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB3475/70A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lundy Electronics and Systems Inc
Original Assignee
Lundy Electronics and Systems 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 Lundy Electronics and Systems Inc filed Critical Lundy Electronics and Systems Inc
Publication of GB1285832A publication Critical patent/GB1285832A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
    • G01C17/20—Observing the compass card or needle
    • G01C17/26—Observing the compass card or needle using electric pick-offs for transmission to final indicator, e.g. photocell
    • 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
    • G01C17/30—Earth-inductor compasses

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Electromagnetism (AREA)
  • Measuring Magnetic Variables (AREA)
  • Navigation (AREA)
GB3475/70A 1969-02-10 1970-01-23 Digital compass Expired GB1285832A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79784369A 1969-02-10 1969-02-10

Publications (1)

Publication Number Publication Date
GB1285832A true GB1285832A (en) 1972-08-16

Family

ID=25171940

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3475/70A Expired GB1285832A (en) 1969-02-10 1970-01-23 Digital compass

Country Status (4)

Country Link
US (1) US3634946A (https=)
DE (1) DE2005818A1 (https=)
FR (1) FR2035234A5 (https=)
GB (1) GB1285832A (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2209835A (en) * 1987-09-15 1989-05-24 Rory Paul Wilson A miniaturized dead reckoning automatic position sensor and recorder for attachment to animals

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1321212A (en) * 1971-04-28 1973-06-27 Laitram Corp Magnetic compass
US3835375A (en) * 1972-01-21 1974-09-10 L Rovner Apparatus for determining the direction of a magnetic field relative to a reference direction by synchronously scanning the field and a memory
US3903610A (en) * 1972-08-18 1975-09-09 North Atlantic Industries Apparatus for measuring magnetic field direction
US3902252A (en) * 1974-01-02 1975-09-02 Safe Flight Instrument Magnetic field directional sensor
US3952420A (en) * 1974-08-05 1976-04-27 E-Systems, Inc. Digital solid state compass
FR2287681A1 (fr) * 1974-10-11 1976-05-07 France Etat Compas magnetique numerique
US3959889A (en) * 1974-11-29 1976-06-01 Thomas Samuel M Method and apparatus for determining a measured direction relative to an external magnetic direction
US3975621A (en) * 1975-02-24 1976-08-17 The Laitram Corporation Digital compass averaging circuit
US4091543A (en) * 1976-06-17 1978-05-30 The Laitram Corporation Automatic magnetic compass correction
DE2727132A1 (de) * 1976-06-17 1978-01-05 Laitram Corp Verfahren und einrichtung zur deviationskorrektur der anzeigesignale digitaler magnetkompasse
US4031630A (en) * 1976-06-17 1977-06-28 The Laitram Corporation Calibration apparatus for automatic magnetic compass correction
US4095348A (en) * 1976-11-10 1978-06-20 The Brunton Company Digital compass
US4633419A (en) * 1983-03-07 1986-12-30 Asahi Kogaku Kogyo K.K. Angle measuring device
WO1988007655A1 (en) * 1987-04-01 1988-10-06 Gustav Rennerfelt Multiturn absolute encoder
US5134394A (en) * 1990-04-12 1992-07-28 Beadle Leigh P Light aircraft navigation apparatus
US5924212A (en) * 1996-10-09 1999-07-20 Donnelly Corporation Electronic compass
US6301794B1 (en) * 1999-05-27 2001-10-16 Johnson Controls, Inc. Vehicle compass system with continuous automatic calibration
USD427531S (en) * 1999-08-12 2000-07-04 Cobbs Manufacturing Company Compass
JP4002174B2 (ja) * 2002-12-19 2007-10-31 矢崎総業株式会社 磁気式舵角検出装置
TW200505208A (en) * 2003-07-24 2005-02-01 Liteon It Corp Mobile communication device
CN100498855C (zh) * 2005-09-21 2009-06-10 上海海事大学 船用全回转车钟
US20110163917A1 (en) * 2010-01-05 2011-07-07 David Lundgren Method and system for antenna orientation compensation for power ranging
KR20120117121A (ko) * 2011-04-14 2012-10-24 주식회사 오토스윙 다기능을 갖는 디지털 눈부심 방지 장치
US12104903B2 (en) * 2021-03-08 2024-10-01 Jefferson Science Associates, Llc Spinning hall probe compass

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA685506A (en) * 1964-04-28 A. Macdonald Angus Servo compass
US2176197A (en) * 1937-05-18 1939-10-17 Sperry Gyroscope Co Inc Earth inductor compass
US2464057A (en) * 1944-11-23 1949-03-08 Fairchild Camera Instr Co Earth inductor compass
US2680241A (en) * 1949-06-02 1954-06-01 Darrin H Gridley Position indication device
US3099090A (en) * 1959-06-19 1963-07-30 Continental Elektro Ind Ag Method and apparatus for digital indication of shaft position
US3197880A (en) * 1961-06-15 1965-08-03 Motorola Inc Solid state compass
US3129402A (en) * 1962-10-30 1964-04-14 Alfred M Henne Digital bearing readout for sector scan sonar
US3298027A (en) * 1964-09-08 1967-01-10 Collins Radio Co Digital automatic direction finding system
US3365799A (en) * 1965-01-13 1968-01-30 Honeywell Inc Angular position measuring device
US3445761A (en) * 1965-09-22 1969-05-20 Us Army Magnetic field intensity meter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2209835A (en) * 1987-09-15 1989-05-24 Rory Paul Wilson A miniaturized dead reckoning automatic position sensor and recorder for attachment to animals

Also Published As

Publication number Publication date
FR2035234A5 (https=) 1970-12-18
DE2005818A1 (de) 1970-11-26
US3634946A (en) 1972-01-18

Similar Documents

Publication Publication Date Title
GB1285832A (en) Digital compass
GB1090047A (en) Improvements in or relating to integrating analog-to-digital converter
GB1389365A (en) Magnetic compass having remote digital readout
GB1409640A (en) Course difference logic
GB1314354A (en) Borehole orientation tool
GB1425033A (en) Data signal recogniion apparatus
GB1091541A (en) Driver training apparatus
CA949926A (en) Tamper proof closure
GB1416941A (en) Electronic reference isochronous period generator and applications
GB1103110A (en) Electrical apparatus
GB1224992A (en) Gyroscopic north seeking device
GB1198587A (en) Number and Symbol Display System.
JPS5446024A (en) Tape counter device of magnetic recorder-reproducer
GB1347657A (en) Magnetic compasses and similar arrangements
GB1352497A (en) Vehicle testing apparatus and safety devices therefor
SU647643A1 (ru) Измеритель интервалов времени
CA788580A (en) Magnetic field polarity sensing galvanomagnetic resistance device
AU432885B2 (en) Detecting change and motion
GB1197085A (en) Shaft Angle Encoding
ANTONIAK et al. Distribution-free detection in radar with multiple resolution elements(Distribution-free signal detection by multiple- resolution-element pulse radar, based on ranks of returns and having invariant false alarm rates)
AU431232B2 (en) Pulse-height analysis in scintillation counting
GB1253600A (en) Control means for an electromagnetic indicator device
CA822396A (en) Sensitive torque meter
CA803165A (en) Sensitive torque meter
SE302420B (https=)

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees