Automobile lane changing early-warning method and lane changing early-warning system

Abstract

The invention relates to an automobile lane changing early-warning method and a lane changing early-warning system. The method comprises the steps of (1) arranging the lane changing early-warning system which comprises an information collecting unit, a system control unit and an early-warning execution unit, wherein a critical safety distance computing module and an early-warning decision module are arranged in the system control unit, and a computing formula for critical safety distance which is right suitable for lane changing and an early-warning decision condition are contained; (2) collecting information of distance between the closest target automobiles in a primary lane where a user automobile is located and a lane-changing target lane in a given front-back range and the user automobile and relative speed information and speed information of the user automobile; (3) computing the critical safety distance suitable for lane changing and comparing actual distance and computed critical safety distance and generating an early-warning control instruction; and (4) sending corresponding alarming information according to the early-warning control instruction. By means of the automobile lane changing early-warning method and the lane changing early-warning system, surrounding driving environment of the user automobile can be detected comprehensively, lane-changing safety under different working conditions can be judged, and collision accidents in the lane changing process can be effectively prevented.

Description

technical field [0001] The invention relates to an active early warning technology for vehicle driving, in particular to a vehicle lane change early warning method and a lane change early warning system that can be detected based on the surrounding driving environment. Background technique [0002] Among various driving behaviors, lane-changing driving has a high risk factor because it involves changing lanes, and it also has a greater impact on traffic flow because it involves the coordinated movement of the own vehicle and surrounding vehicles. safety, but also to ensure smooth flow of traffic. If the driver’s estimation of the distance from the vehicle to the vehicle in the target lane or the relative position and relative motion state of the vehicles in front and behind the original lane is inaccurate, it is very likely to make a wrong judgment on the feasibility of safe lane changing, which will easily lead to corresponding traffic accidents. . [0003] At present, re...

AI Technical Summary

Problems solved by technology

Most of the lane-changing warning systems used for safe driving assistance use this simple lane-changing movement as the basis for the analysis of safety issues. The analysis process does not consider the vehicle in front of the original lane and the rear vehicle in the original lane. and the relative motion relationship between the vehicle in front of the target lane and the potential risk of collision, so the analysis factors are not comprehensive enough to provide early warning for all possible collision forms during the lane change process; in addition, a small part of the lane change warning system In the design, the safety analysis of the lane change process can be carried out according to the relative motion relationship between the original lane and the target lane of the four vehicles at the front and rear. In the process of judging the feasibility of the lane change, the extreme collision avoidance or the The same safety distance standard is used for vehicles in different orientations. These lane change feasibility analysis methods do not meet the driver's general lane change habits and the driver's demand for the lane change assistance system.

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