| 摘要 |
An azimuth detecting device is disclosed for mounting in a mobile object. The device comprises a geomagnetic sensor, a GPS signal receiving means, a means for measuring a position of the mobile object via the GPS signal, and a controller. When a level of the GPS signal received is lower than a predetermined level, the controller calculates a gain correction value based on a method of least squares via an output value of the geomagnetic sensor. When a level of the GPS signal received is equal to or greater than the predetermined level, the controller calculates a declination correction value and/or an inclination correction value based on information obtained from the GPS signal, and corrects the output value of the geomagnetic sensor accordingly. The controller may also compare the reliability of position information and speed information of the mobile object, both being obtained via the GPS signal. |
