DEVELOPMENT OF ELECTRONIC COMPASS FOR AUTOMOBILE, USING MAGNETORESISTIVE ELEMENTS

These days, a variety of navigation systems have been developed to provide the driver with necessary information such as vehicle location, direction and destination. An electronic compass is being widely used as a component for such navigation systems. Compared with a conventional magnetic compass, an electronic compass has the following advantages: (1) high vibration durability and quick response; (2) easy to calibrate and reliable; and (3) sensor and display units can be separated. The electronic compass, however, is accompanied by two serious subjects: the development of a sensitive geomagnetic sensor, and calibration of direction error due to an unexpectedly magnetized vehicle body. First, a new geomagnetic sensor utilizing magnetoresistive elements (MRE) and magnetic lenses was developed. Next, the magnetic disturbances were clarified and the mechanism of vehicle magnetization defined, thereby establishing a simple calibration technique for such magnetization. As a result, the newly developed electronic compass has been in mass-production since May 1991.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/1560913495
• Supplemental Notes:
  • This paper appears in SAE SP-964, "Automotive Display Systems and IVHS".
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Ota, K
  • HASHIMOTO, T
• Publication Date: 1993-3

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 81-89
• Serial:
  • SAE Special Publications
  • Publisher: Society of Automotive Engineers (SAE)

Subject/Index Terms

• TRT Terms: Automobiles; Calibration; Chemical elements; Compasses; Electromagnetism; Navigation systems; Resistance (Electricity)
• Uncontrolled Terms: Magnetoresistance
• Old TRIS Terms: Geomagnetic sensors
• Subject Areas: Highways; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00634515
• Record Type: Publication
• ISBN: 1560913495
• Report/Paper Numbers: SAE/SP-93/964, Paper 930455, Paper 930456
• Files: TRIS
• Created Date: Aug 23 1993 12:00AM