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

Abstract

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.

Description

technical field [0001] The invention relates to a vehicle positioning method, in particular to a vehicle magnetic positioning method. Background technique [0002] At present, there are many vehicle positioning methods, mainly including GPS global positioning, laser measurement positioning, optical positioning, inertial navigation positioning, machine vision positioning and ultrasonic positioning. [0003] The GPS global positioning system is controlled by a foreign country; [0004] The guidance and positioning accuracy of the laser measurement and positioning technology is high, but the installation process of the sensor and the launch device is complicated, and the position calculation is also complicated, and the precise position of the sensor system can be given in real time only if there is a cooperative target; [0005] Optical measurement and positioning When there are interfering light sources outside, it is easy to produce wrong positioning results, and it cannot ...

AI Technical Summary

Problems solved by technology

[0007] Machine vision positioning has the problems of poor real-time performance and severe weather conditions in practical applications;

[0008] The defect of the ultrasonic positioning system is that when there are more than two positioning objects in the positioning space, the base station needs to distinguish the signals emitted by each positioning object. When the number of positioning objects increases, the difficulty of distinguishing the positioning objects and the complexity of the entire system will become Exponential increase

In the actual landmark position, there are often multiple targets, so it is not applicable

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