NAVIGATION PROCESS FOR VEHICLES EQUIPPED WITH AN ELECTRONIC COMPASS

摘要

A process for determining the orientation of the Earth's magnetic field, the north or the direction of travel of a vehicle by means of a magnetometer fixed inside the vehicle, dynamically compensates or traces changes die to interference fields. For that purpose, a resulting vector (vK) representing the interference field change is obtained according to the equation vK = vM - vB - HH from the magnetic field vector (vM) at the magnetometer, the previous hard magnetic interference field vector (HH) and the reference vector (VP) deduced from the locus curve (O) of the magnetic field. The vector (vK) thus obtained is then weighted with a factor (k < 1), and the thus weighted vector (k xvK) is added to the previous interference field vector (HH). The orientation of the Earth's magnetic field is then calculated in a known manner with the new hard magnetic interference field vector (HH') thus obtained and evaluated for navigation purposes.