Vehicle lane departure system based on magnetic field flux detection

摘要

Described herein is a system and method that recognizes vehicle lane departure in road conditions affected by environmental conditions. The system uses magnetic field flux detection to determine if a vehicle is departing from a projected vehicle trajectory or a determined vehicle position between lanes. A magnetic material is applied to the stripes painted on road surfaces or on other applicable lane boundary indicators. The system uses magnetic field flux sensors or Hall Effect sensors mounted in the vehicle to recognize changes in magnetic field flux from the magnetized road stripe. These changes in magnetic field flux are interpreted by the system to determine whether alarms should be initiated for vehicle lane departure.

主权项

1. A vehicle lane departure system, comprising:
a plurality of magnetic field detectors positioned on a vehicle to detect magnetic fields from magnetic road markers on a road; an electronic control unit (ECU) connected to the plurality of magnetic field detectors, wherein the ECU initiates an event when at least certain magnetic field detectors of the plurality of magnetic field detectors detect a magnetic field with respect to a magnetic road marker; a front magnetic field detector of the magnetic field to start a warning time window; a rear magnetic field detector to start an alarm time window when the rear magnetic field detector detects another magnetic field in the warning time window; and a second front magnetic field detector sends an alarm when the second front magnetic field detector detects the magnetic field in the alarm time window, wherein the front magnetic field detector, the rear magnetic field detector and the second front magnetic field detector are the at least the certain magnetic field detectors of the plurality of magnetic field detectors and the event is an alarm.