Early-warning device and method preventing chain rear-end collisions of vehicles

Abstract

The invention relates to the field of motor vehicle driving safety and discloses an early-warning device and method preventing chain rear-end collisions of vehicles. The device comprises a microprocessor, a vehicle-mounted CAN bus, a vehicle speed sensor of the vehicle, a millimeter-wave radar, a CAN bus converter and a signal lamp. The vehicle speed sensor of the vehicle is connected with the vehicle-mounted CAN bus. The millimeter-wave radar is used for detecting relative speeds, relative angles and relative distances, relative to the vehicle, of the multiple vehicles in front of the vehicle and transmitting motion state data to the vehicle-mounted CAN bus. The CAN bus converter is used for extracting motion state data, relative to the vehicle, of the vehicles in front of the vehicle on the vehicle-mounted CAN bus and the speed of the vehicle. The signal lamp is used for reminding people of braking occurrence of the nearest vehicle and the nearer vehicle. The device can detect the motion states of the nearest vehicle and the nearer vehicle in front of the vehicle in advance and remind a driver about safety, so that the driver operates the vehicle in advance, and then the rear-end collision accident is avoided.

Description

technical field [0001] The invention relates to the field of driving safety of motor vehicles, in particular to an early warning device and an early warning method for preventing serial rear-end collisions of vehicles. Background technique [0002] Rear-end collision is a common serious traffic accident. It is closely related to whether the driver can obtain the motion status of other vehicles in front of the vehicle in time. Statistics show that rear-end collision has caused a large number of traffic accidents and brought huge losses to people's lives and properties. . During the normal driving process, the driver operates the vehicle according to the change of the motion state of the vehicle in front or the motion state of other traffic participants in front of the vehicle, so as to ensure the safety of driving. [0003] A typical rear-end collision situation is that the front and rear vehicles do not maintain a safe distance during driving. After the front vehicle brakes...

AI Technical Summary

Problems solved by technology

[0004] At present, the preventive devices for rear-end collision accidents are basically based on detecting the distance between the vehicle directly in front of the vehicle and the vehicle, and generally use the distance required for emergency braking of the vehicle as the threshold, which makes the control of the device have certain limitations. and the potential serious traffic accidents of serial rear-end collisions cannot be effectively prevented. It is difficult to obtain the position and motion state of the surrounding vehicles relative to the vehicle by using the Internet of Vehicles technology, and it is difficult to achieve at present, and the cost high

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