A system and method for autonomous car following based on two-dimensional code

Abstract

The invention provides an autonomous vehicle-following system and method based on a two-dimensional code. The autonomous vehicle-following system comprises a data collecting unit and a data analyzingunit. The data collecting unit collects a visual image and the ultrasonic distance measuring number in real time and transmits collected data to the data analyzing unit in real time. A data processingmodule receives the data of the data collecting unit, if a target vehicle is in front, the relative position and angle between vehicles are estimated according to the visual image and the actual dimension of a two-dimensional code logo arranged on the vehicle, whether collision-avoidance warning is conducted or not is judged by combining ultrasonic data, and the result is transmitted to a multi-vehicle cooperative positioning calculating module; and the multi-vehicle cooperative positioning calculating module integrates position information of all the vehicles in the system to calculate to improve the self-positioning precision and predict position information of the target vehicle, and the speed and directional rotating angle, needing to be adjusted, of the vehicle are analyzed and obtained. Safety of motorcade traveling is improved, the vehicle-following precision and reliability are ensured, and the cost price is low.

Description

technical field [0001] The present invention relates to the technical field of autonomous car following for automatic driving, in particular to a two-dimensional code-based autonomous car following system and method. Background technique [0002] Accurate vehicle position information and relative position information between vehicles are the basis of many vehicle application systems. With the help of global satellite navigation system (GNSS) and positioning enhancement technology, the vehicle positioning accuracy of about 10m can be obtained, but GNSS is a single-node positioning technology, which obviously cannot meet the high positioning accuracy requirements of some applications such as vehicle safety in the vehicle self-organizing network Moreover, when the GNSS signal is blocked, it is even more difficult to obtain accurate position information between vehicles and vehicles. The relative positional relationship between vehicles is an important issue in the research of ...

AI Technical Summary

Problems solved by technology

In this patent, the leading vehicle is driven manually, and the other vehicles are following vehicles. Each vehicle is equipped with a positioning unit, a communication unit, a detection unit, and an automatic driving control unit. The detection unit is used to measure the position information between vehicles. The communication part is connected with the positioning part, and is responsible for exchanging position information with adjacent vehicles. Although this solution can realize autonomous vehicle following in coordination among vehicles, it is difficult to achieve low-cost and high-precision autonomous tracking for applications such as batch transfer of fleets. Following the car, and the manual interaction link is weak, there are only location distinctions between different vehicles, and it is inconvenient to carry out vehicle numbering, so it is difficult for the leading vehicle to obtain vehicle ranking and real-time monitoring of the number and status of vehicles in the convoy, driving reliability needs to be improved

Images