State Machine for Detecting Vehicles by Magnetometer Sensors

This letter presents a vehicle detection state machine for magnetometer sensors. The state machine designed by Chinrungrueng and Kaewkamnerd for a single lane is extended to n motorway lanes with multiple lane changes. The proposed method has good performance in terms of the detection rate and the false detections, which are mainly due to the interference from a vehicle in an adjacent lane and lane changing. The state machine is evaluated on a real motorway and compared with industrial sensors.