CN-117416347-B - System and method for controlling speed limit and safe distance of automobile

CN117416347BCN 117416347 BCN117416347 BCN 117416347BCN-117416347-B

Abstract

The invention provides an automobile speed limiting and safe vehicle distance control system and method, and relates to the technical field of automobile control. Comprises a controller for judging whether the distance between the vehicle and the front vehicle is too close, if yes, a speed reducing instruction is sent to a vehicle speed control device; judging whether the distance between the vehicle and the rear vehicle is too close in the speed reduction process or whether the distance between the vehicle and the front vehicle is still too close in the process of reducing the vehicle speed to a set value, and sending a reminding signal to remind a driver to stop the speed reduction and perform lane change processing when at least one of the distances is met; and the vehicle speed control device is used for receiving the speed reducing instruction and performing speed reducing operation. The invention comprehensively considers the safety distance between the self vehicle and the front vehicle, the road environment and the safety distance between the self vehicle and the rear vehicle, firstly carries out deceleration processing when the distance between the self vehicle and the front vehicle is detected to be too close, and reminds a driver to stop deceleration and carry out lane changing processing when the distance between the self vehicle and the front vehicle is still too close after the speed is reduced to a set value or the distance between the self vehicle and the rear vehicle is detected to be too close in the deceleration process.

Inventors

CUI XIAOYU
CHEN JUAN
ZHOU NIQING
JIANG HAO
WANG CHAOFAN
LIU CHANG
ZHOU HONGJUAN

Assignees

奇瑞汽车股份有限公司

Dates

Publication Date: 20260505
Application Date: 20231116

Claims (8)

1. Speed limit and safe vehicle distance control system of car, characterized by, include: The controller is used for acquiring the speed of the self vehicle, the distance between the self vehicle and the front vehicle and the distance between the self vehicle and the rear vehicle, judging whether the distance between the self vehicle and the front vehicle is too close, if so, sending a speed reducing instruction to the vehicle speed control device, and meanwhile judging whether the distance between the self vehicle and the rear vehicle is too close in the speed reducing process or whether the distance between the self vehicle and the front vehicle is still too close in the process of reducing the speed to a set value, and sending a reminding signal to remind a driver to stop reducing and carrying out lane changing processing when at least one of the two conditions is met; A vehicle speed control device for receiving a deceleration instruction and performing a deceleration operation; After the speed of the self vehicle is reduced to a proper set value, the distance between the self vehicle and the front vehicle is still relatively short, at the moment, even if the distance between the rear vehicle and the self vehicle is relatively long, the rear-end collision risk is increased if the speed reduction treatment is continuously carried out, at the moment, lane change reminding is needed for a driver, and the driver can carry out corresponding lane change operation; The information acquisition system is used for acquiring road speed limit sign information, the distance between a front vehicle and a rear vehicle and vehicle speed information and sending the information to the controller; The positioning system is used for acquiring vehicle information and speed limit information of the current road and sending the vehicle information and the speed limit information to the controller; The controller is also used for determining the actual speed limit value of the current road based on the received road speed limit sign information and the received speed limit information, and acquiring the actual distance between the vehicle and the front vehicle and the actual distance between the vehicle and the rear vehicle based on the vehicle distance and the vehicle speed information between the front vehicle and the rear vehicle and the vehicle information of the current road; The instrument display system is used for receiving the real-time speed of the self-vehicle, the actual speed limit value of the current road, the actual distance between the self-vehicle and the front vehicle and the distance between the self-vehicle and the rear vehicle, which are sent by the controller, and displaying the received information; The overspeed control of the vehicle speed is embedded into the control logic of the safe vehicle distance, and when the overspeed and the too close vehicle distance occur simultaneously, the overspeed control is preferentially performed, and the overspeed control logic is executed.
2. The vehicle speed limit and safety distance control system of claim 1, wherein the controller is further configured to: And when the distance between the vehicle and the rear vehicle is always in the safe distance in the deceleration process, performing deceleration processing according to the current lane until the vehicle speed is reduced to the set value.
3. The vehicle speed limit and safe distance control system according to claim 2, wherein the controller is further configured to, when the speed reduction process is performed in accordance with the current lane: and stopping sending the speed reducing instruction to the vehicle speed control device after judging that the vehicle speed reaches the set value and the distance between the vehicle speed and the front vehicle meets the safety distance.
4. The vehicle speed limit and safety distance control system of claim 1, wherein the controller is further configured to: And judging whether the vehicle performs lane change operation, if so, stopping sending a deceleration instruction to the vehicle speed control device.
5. The vehicle speed limit and safety distance control system according to claim 1, wherein the controller is configured to use a smaller value of road speed limit sign information and speed limit information as an actual speed limit value of a current road, and use a smaller value of vehicle distance information of a preceding vehicle and a following vehicle and vehicle information of the current road as an actual distance between the vehicle and the preceding vehicle and a distance between the vehicle and the following vehicle.
6. The vehicle speed limit and safety distance control system according to claim 1, wherein the controller is further configured to obtain a real-time speed of the own vehicle, determine whether the real-time speed of the own vehicle exceeds an actual speed limit value of the current road, and if so, send a speed reduction command to the vehicle speed control device.
7. The vehicle speed limit and safety distance control system of claim 6, wherein: The controller is also used for firstly sending reminding information to the alarm device after judging that the real-time speed of the self vehicle exceeds the actual speed limit value of the current road or the self vehicle is too close to the front vehicle, and sending a speed reducing instruction to the vehicle speed control device after judging that the driver does not take the speed reducing action in the set time; and the alarm device is used for receiving the reminding signal and sending out voice reminding.
8. The automobile speed limiting and safe distance control method is characterized by comprising the following steps of: The controller acquires the speed of the self vehicle, the distance between the self vehicle and the front vehicle and the distance between the self vehicle and the rear vehicle, judges whether the distance between the self vehicle and the front vehicle is too close, if so, sends a speed reducing instruction to the vehicle speed control device, and simultaneously judges whether the distance between the self vehicle and the rear vehicle is too close in the speed reducing process or whether the distance between the self vehicle and the front vehicle is still too close in the process of reducing the speed to a set value, and sends a reminding signal to the warning device to remind a driver to stop reducing and carrying out lane changing processing when at least one of the two conditions is met; The vehicle speed control device receives a speed reducing instruction and performs speed reducing operation; After the speed of the self vehicle is reduced to a proper set value, the distance between the self vehicle and the front vehicle is still relatively short, at the moment, even if the distance between the rear vehicle and the self vehicle is relatively long, the rear-end collision risk is increased if the speed reduction treatment is continuously carried out, at the moment, lane change reminding is needed for a driver, and the driver can carry out corresponding lane change operation; The information acquisition system is used for acquiring road speed limit sign information, the distance between a front vehicle and a rear vehicle and vehicle speed information and sending the information to the controller; The positioning system is used for acquiring vehicle information and speed limit information of the current road and sending the vehicle information and the speed limit information to the controller; The controller is also used for determining the actual speed limit value of the current road based on the received road speed limit sign information and the received speed limit information, and acquiring the actual distance between the vehicle and the front vehicle and the actual distance between the vehicle and the rear vehicle based on the vehicle distance and the vehicle speed information between the front vehicle and the rear vehicle and the vehicle information of the current road; The instrument display system is used for receiving the real-time speed of the self-vehicle, the actual speed limit value of the current road, the actual distance between the self-vehicle and the front vehicle and the distance between the self-vehicle and the rear vehicle, which are sent by the controller, and displaying the received information; The overspeed control of the vehicle speed is embedded into the control logic of the safe vehicle distance, and when overspeed and too close vehicle distance occur simultaneously, the overspeed control is preferentially carried out, and the overspeed control logic is executed.

Description

System and method for controlling speed limit and safe distance of automobile Technical Field The invention belongs to the technical field of automobile control, and particularly relates to an automobile speed limiting and safe vehicle distance control system and method. Background The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. With the continuous development of social economy, the living standard of people is gradually improved, and automobiles become a main transportation means for daily life. Safety in driving automobiles is also attracting more and more attention. When driving an automobile, particularly when driving on a highway, the automobile is required to drive according to the requirement of speed limit of the road, and a certain safety distance is kept between the automobile and the front automobile, when the front automobile suddenly decelerates and the automobile is close to the front automobile, the processing principle of 'letting speed not give way' is held, and the conventional processing of the driver is to firstly decelerate the automobile. If the speed is not reduced in time, the automobile collides with the front automobile and is in rear-end collision, and the personal safety of a driver is threatened. Along with the breakthrough of the artificial intelligence field, the automatic driving technology and functions of the vehicle are developed in a diversified manner, the existing automobile mostly adopts a scheme for realizing the intelligent driving function by utilizing the cooperation of a plurality of high-precision sensors, and based on the high-precision sensors, a plurality of functions can be realized by assisting an executing mechanism, a high-precision map and GPS positioning to liberate both hands and feet of a driver. The inventor finds that the prior art has a technical scheme for monitoring the distance between the vehicle and the front vehicle and controlling the speed reduction of the vehicle. For example, a system and a method for preventing traffic accidents of vehicles are disclosed in chinese patent application CN 108973854A, wherein after a safe distance between vehicles is calculated by combining kinetic energy of vehicles and preset braking parameters, it is determined whether the distance between vehicles is smaller than the safe distance, and if it is determined that the distance between vehicles is smaller than the safe distance, the driver is prompted to reduce the speed, and if it is determined that the speed of vehicles is not reduced, the speed of vehicles is forcibly reduced until the distance between vehicles is greater than the safe distance. However, a vehicle traveling at a high speed suddenly decelerates until the distance from the front vehicle is greater than the safe distance, and during such rapid deceleration, there is a risk of a series of rear collisions of the rear vehicle due to the deceleration. Therefore, the safety distance between the vehicle and the front vehicle is kept only by the technical means of speed reduction, and there is still room for improvement in the safety of automobile driving. Disclosure of Invention In order to overcome the defects of the prior art, the invention provides an automobile speed limiting and safety distance control system and method, which comprehensively consider the safety distance between an own automobile and a front automobile, the road environment and the safety distance between the own automobile and a rear automobile, when the distance between the own automobile and the front automobile is detected to be too close, firstly, the speed reducing treatment is carried out, when the speed is reduced to a set value and still is too close to the front automobile, or when the distance between the own automobile and the rear automobile is detected to be too close to the speed reducing treatment in the speed reducing process, the driver is reminded to stop the speed reducing treatment and the lane changing treatment. To achieve the above object, one or more embodiments of the present invention provide the following technical solutions: the first aspect of the invention provides an automobile speed limiting and safety distance control system. An automotive speed limit and safety distance control system comprising: The controller is used for acquiring the speed of the self vehicle, the distance between the self vehicle and the front vehicle and the distance between the self vehicle and the rear vehicle, judging whether the distance between the self vehicle and the front vehicle is too close, if so, sending a speed reducing instruction to the vehicle speed control device, and meanwhile judging whether the distance between the self vehicle and the rear vehicle is too close in the speed reducing process or whether the distance between the self vehicle and the front vehicle is still too close in the process of reduc