JPS57175208A - Azimuth detecting device - Google Patents

Azimuth detecting device

Info

Publication number
JPS57175208A
JPS57175208A JP6182681A JP6182681A JPS57175208A JP S57175208 A JPS57175208 A JP S57175208A JP 6182681 A JP6182681 A JP 6182681A JP 6182681 A JP6182681 A JP 6182681A JP S57175208 A JPS57175208 A JP S57175208A
Authority
JP
Japan
Prior art keywords
magnetic
permeable material
magnetism
travelling
sensor
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.)
Pending
Application number
JP6182681A
Other languages
Japanese (ja)
Inventor
Muneaki Matsumoto
Akira Kuno
Akishi Numata
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.)
Soken Inc
Original Assignee
Nippon Soken 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 Nippon Soken Inc filed Critical Nippon Soken Inc
Priority to JP6182681A priority Critical patent/JPS57175208A/en
Priority to DE19813150872 priority patent/DE3150872A1/en
Priority to US06/334,378 priority patent/US4523386A/en
Publication of JPS57175208A publication Critical patent/JPS57175208A/en
Pending 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
    • G01C17/38—Testing, calibrating, or compensating of compasses

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Navigation (AREA)

Abstract

PURPOSE:To detect the travelling direction of a travelling object with higher accuracy without giving any compensation to the magnetic field with use of a compensating magnet, by magnetically shielding the residual magnetism of a magnetic substance and at the same time using a magnetic permeable material that has no magnetic saturation with the earth magnetism. CONSTITUTION:A magnetic permeable material like a silicon steel, etc. 3 that has higher permeability than a roof steel plate 4 of a car 2 functioning as the first magnetic material and has no magnetic saturation with the earth magnetism is covered at the inner side of the plate 4. an azimuth detecting sensor 1 is attached to the inside of the permeable material with a distance L secured between them. The signals detected by the sensor 1 are sent to a signal processing circuit 5 set at the inside of the car to detect the azimuth. In such way, the effect of the residual magnetism of the magnetic material is greatly reduced to the magnetism detection of the sensor 1. Furthermore the hysteresis can be reduced in the rotating direction compared with a magnetic permeable material having high permeability and the magnetic saturation. Thus the travelling direction can be detected accurately for a travelling object without giving any compensation to the magnetic field.
JP6182681A 1980-12-26 1981-04-22 Azimuth detecting device Pending JPS57175208A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP6182681A JPS57175208A (en) 1981-04-22 1981-04-22 Azimuth detecting device
DE19813150872 DE3150872A1 (en) 1980-12-26 1981-12-22 "COURSE DETERMINATION DEVICE"
US06/334,378 US4523386A (en) 1980-12-26 1981-12-24 Heading detecting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6182681A JPS57175208A (en) 1981-04-22 1981-04-22 Azimuth detecting device

Publications (1)

Publication Number Publication Date
JPS57175208A true JPS57175208A (en) 1982-10-28

Family

ID=13182277

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6182681A Pending JPS57175208A (en) 1980-12-26 1981-04-22 Azimuth detecting device

Country Status (1)

Country Link
JP (1) JPS57175208A (en)

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