| 摘要 |
<p>A vehicle guidance system (12) for guiding a vehicle (10) along a magnetic marker (20) including a first magnetic sensor (28) having a sensing axis (32) for measuring a first magnetic field. A second magnetic sensor (30) has a sensing axis (36), measuring a second magnetic field. The second axis crosses the first axis at a vehicle guide point (38). A processor (16) configured to receive data representative of the magnetic field and calculates a lateral offset between the guide point and magnetic marker based upon the measured magnetic fields. A method for guiding a vehicle includes measuring magnetic field strength proximate the marker, measuring ambient magnetic field strength remote from the marker, nulling the ambient magnetic field by removing the remote magnetic field strength from the proximate magnetic field strength, calculating a lateral displacement between the vehicle responsive to the lateral displacement between the vehicle and the marker.</p> |
