Pre-alarm method for preventing rear-end collision by following car

Abstract

The invention relates to an early warning method for preventing rear-end collision with a rearward vehicle and an early warning system thereof, wherein the method comprises the following steps: 1) arranging an early warning system for preventing rear-end collision with the rearward vehicle, which comprises an information acquisition unit, a system control unit comprising a singlechip as well as an early warning execution unit; wherein, an early warning module for preventing rear-end collision with the rearward vehicle is prearranged inside the singlechip, a collision warning range and a formula calculating the collision time of the vehicles are prearranged inside the early warning module for preventing rear-end collision with the rearward vehicle; 2) acquiring the distance between the rearward vehicle and own vehicle and relative speed information and acquiring own speed information; 3) calculating time of collision TTC and a warning time threshold of collision TTC_W of the rearward vehicle and own vehicle; 4) generating a control instruction in accordance with the difference value between the calculated time threshold of collision TTC and the warning time threshold of collision TTC_W of the rearward vehicle and own vehicle as well as the prearranged collision warning range; 5) sending corresponding warning information according to the control instruction. The invention can real-timely and accurately monitor the relative motion state between own vehicle and the rear vehicle that travels in the same traffic lane, thus effectually preventing the rear-end collision of the vehicles that traveling at high speed.

Description

technical field [0001] The invention relates to the field of traffic safety, in particular to an early warning method for preventing rear-end collisions and an early warning system thereof. Background technique [0002] Rear-end collisions are the most common form of road traffic accidents. According to the statistics of China's traffic management department, rear-end collisions account for about 30% of the total number of road traffic accidents. The main reasons for rear-end collision accidents are: high vehicle speed, low driver awareness or fatigue driving, etc. Therefore, the development of an early warning system that can monitor the driving environment in real time and issue early warning information to the driver in real time and accurately is of great help to improving vehicle driving. It is of great significance to reduce the occurrence of rear-end collision accidents. [0003] At present, domestic and foreign rear-end collision prevention technologies mainly inclu...

AI Technical Summary

Problems solved by technology

[0004] However, the above three early warning technologies have their own problems: most of the information sensing devices in the first early warning technology can only detect the road conditions in front of the vehicle, and the danger warning information is only provided to the driver of the vehicle, and this type of The early warning technology can only prevent the vehicle from rear-end collision with the vehicle in front, but cannot prevent the vehicle from being rear-end collided by other vehicles, so this technology is not suitable for vehicles transporting flammable, explosive and other dangerous goods

The second early warning technology is to provide warning information to the driver of the following vehicle according to the movement state of the own vehicle, but not to provide warning information to the driver of the own vehicle according to the relative movement state of the two vehicles, especially the movement state of the rear vehicle.

The third is to install a device at the rear of the vehicle to detect obstacles at the rear of the vehicle, but the main purpose of this type of technology is to provide safety assistance to the driver of the vehicle when reversing, and most of these detection devices use ultrasonic radars, cameras, etc. Cannot prevent the occurrence of high-speed vehicle rear-end collision accidents

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