Magnetic positioning method of traffic vehicle based on displacement cyclic unique code

The invention discloses a magnetic positioning method of a traffic vehicle based on a displacement cyclic unique code, and the method comprises the following steps: 1. magnetic spikes are laid on a road at an equal interval according to rules of the displacement cyclic unique code; 2. the vehicle is provided with a vehicle-borne magnetic sensor and a sensor acquisition card; 3. the data acquired by the sensor acquisition card is detected by a vehicle control unit in real time; 4. whether the vehicle is in a magnetic spike positioning region or not is judged; 5. whether the quantity of the magnetic spikes sensed by the vehicle-borne magnetic sensor is four or five is judged; 6. code values of four magnetic spikes are determined; 7. code values of five magnetic spikes are determined; and 8. the position of the vehicle is determined. The method can realize local positioning of the vehicle at a landmark point, is stable and reliable, does not need power supply and maintenance, is not easy to be fouled or covered,