| 摘要 |
A 3-D dual gyro-sensor for a car navigation is provided to prevent a distance error of a car between a practical moving distance and a moving distance displayed on a map and to thereby prevent an error of map matching. A 3-D dual gyro-sensor for a car navigation includes a magnetic force part(10), a GMA(Giant Magnetostrictive Alloy,20), and a GMR(Giant Magnetostrictive Resistor,30). The magnetic force part consists of a magnet(11) and a coil(12) and receives a pulse signal having a frequency of a predetermined level during traveling. The GMA changes magnetic field in accordance with the frequency. The GMR changes a voltage for calculating a gyro-angle of rotation of the vehicle in accordance with the change of the magnetic field in the GMA.
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