JPS5776410A - Azimuth detector - Google Patents

Azimuth detector

Info

Publication number
JPS5776410A
JPS5776410A JP15265480A JP15265480A JPS5776410A JP S5776410 A JPS5776410 A JP S5776410A JP 15265480 A JP15265480 A JP 15265480A JP 15265480 A JP15265480 A JP 15265480A JP S5776410 A JPS5776410 A JP S5776410A
Authority
JP
Japan
Prior art keywords
flux gate
ebx
eby
electric power
power sources
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.)
Granted
Application number
JP15265480A
Other languages
Japanese (ja)
Other versions
JPS6239882B2 (en
Inventor
Hiroshi Ando
Hiroshi Higashida
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.)
Kikusui Electronics Corp
Original Assignee
Kikusui Electronics Corp
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 Kikusui Electronics Corp filed Critical Kikusui Electronics Corp
Priority to JP15265480A priority Critical patent/JPS5776410A/en
Publication of JPS5776410A publication Critical patent/JPS5776410A/en
Publication of JPS6239882B2 publication Critical patent/JPS6239882B2/ja
Granted 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
    • G01C17/28—Electromagnetic compasses
    • G01C17/30—Earth-inductor compasses

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

PURPOSE:To simplify an azimuth detector by finding the zero-crossing point of the 2nd higher harmonic obtained by adding the outputs generated when flux gate sensors arranged orthogonally are respectively driven by flux gate driving electric power sources shifted by 45 deg. to each other. CONSTITUTION:The output of a clock generator 11 is counted up by a counter 12 and, flux gate driving electric power sources ebx 64 , eby having 45 deg. phase shift to each other are outputted from power amplifiers 18, 19 through a T type flip-flop (FF) 14, a D type FF, and inverters 16, 17. Flux gate sensors 20, 21 are arranged orthogonally to each other detect (x) and (y) components of the magnetic field ex, ey and driven by the flux gate driving electric power sources ebx, eby. The output of sensors 20, 21 are proportional to the (x) and (y) components of the magnetic field and are generated as signals which have the frequency equal to twice the driving frequency and have 90 deg. phase shift to each other. These ouputs are added by an adder 22 and a signal exy is obtained through a band pass amplifier 23. By latching the count value from the leading edge of ebx to the zero-crossing point of eby, the detected azimuth is dis played digitally.
JP15265480A 1980-10-30 1980-10-30 Azimuth detector Granted JPS5776410A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15265480A JPS5776410A (en) 1980-10-30 1980-10-30 Azimuth detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15265480A JPS5776410A (en) 1980-10-30 1980-10-30 Azimuth detector

Publications (2)

Publication Number Publication Date
JPS5776410A true JPS5776410A (en) 1982-05-13
JPS6239882B2 JPS6239882B2 (en) 1987-08-25

Family

ID=15545148

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15265480A Granted JPS5776410A (en) 1980-10-30 1980-10-30 Azimuth detector

Country Status (1)

Country Link
JP (1) JPS5776410A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49101067A (en) * 1972-08-18 1974-09-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49101067A (en) * 1972-08-18 1974-09-25

Also Published As

Publication number Publication date
JPS6239882B2 (en) 1987-08-25

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