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, has long service life and is beyond the control of satellite signals of other countries.