Development of Electronic Compass for Automobile, Using Magnetoresistive Elements 930551
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.
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. Download Citation
Author(s):
Kazuhide Ota, Toshio Hashimoto
Affiliated:
Toyota Motor Corp.
Pages: 11
Event:
International Congress & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Automotive Display Systems and Ivhs-SP-0964, Navigation and Intelligent Transportation Systems-PT-72
Related Topics:
Magnetic materials
Calibration
Sensors and actuators
Vehicle drivers
Durability
Reliability
Vibration
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