This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of Electronic Compass for Automobile, Using Magnetoresistive Elements
Annotation ability available
Sector:
Language:
English
Abstract
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 (1), (2) and (3). 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.
- 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, we developed a new geomagnetic sensor utilizing magnetoresistive elements (MRE) and magnetic lenses. Next, we clarified the magnetic disturbances and defined the mechanism of vehicle magnetization, 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.
Recommended Content
Topic
Citation
Ota, K. and Hashimoto, T., "Development of Electronic Compass for Automobile, Using Magnetoresistive Elements," SAE Technical Paper 930551, 1993, https://doi.org/10.4271/930551.Also In
References
- Itoh H. Magnetic Field Sensor and its Application to Automobiles Society of Automobtive Engineers, Transactions No. 800123 1980
- Peters T.J. Automobile Navigation Using a Magnetic Flux-gate Compass IEEE Transaction on Vehicular Technology VT-35 2 May 1986 41 47
- Umeda Y. et al Development of the New Toyota Electro-Multivision Society of Automotive Engineers, Transactions No. 920601 1992
- Ripka P. Improved Flux-gate for Compasses and Position Sensors Journal of Magnetism and Magnetic Materials 83 1990 543 544
- Petersen A. The Magnetoresistive sensor Electronic Components and Applications 8 4 222 239