A portable device has an input unit inputted with a direction searching command for searching a direction to the specific location and with a current city information setup by a user, a geomagnetic sensor for detecting a geographical direction, a storage u...

A device for automatically detecting a calibration termination of a geomagnetic sensor includes a detection unit for detecting signals X and Y outputted from X-axis and Y-axis coils of the geomagnetic sensor, respectively, a calculation unit for calculatin...

An apparatus and method of compensating for the change of an earth magnetic sensor output according to an attitude (roll and pitch) using an inclinometer in the case of calculating azimuth information using a two-axis earth magnetic sensor is disclosed. Th...

To provide an adjusting method of an electronic azimuth meter capable of properly adjusting the electronic azimuth meter and an apparatus used for the method. According to an adjusting method of an electronic azimuth meter having a magnetic detector, magne...

To reduce a dispersion in a sensitivity of a magnetism detecting circuit driving, by current, a magnetism sensor comprising magnetism resistance elements in a bridge constitution to a dispersion in a sensitivity of a magnetism sensor. An electronic azimuth...

A correcting mechanism of an electronic azimuth meter includes a storing unit for storing maximum values and minimum values with regard to magnetic field detecting values by X- and Y-direction magnetic sensors, an updating unit for updating the magnetic fi...