PND REPOSITIONING DETECTOR FOR BETTER NAVIGATION ACCURACY IN A CAR

摘要

An apparatus and method for a personal navigation device including a personal navigation device (PND) for providing navigation guidance information is provided. The PND may comprise a one-dimensional magnetic detector for sensing the magnetic flux amplitudes of the magnetic field produced by the magnet. Alternatively, the PND may include a three-dimensional magnetic detector and a self-calibrating module for determining a peripheral magnetic field calibration value appearing just in the vicinity of the PND.