Vehicle anti-collision method

Abstract

The invention discloses a vehicle anti-collision method. The vehicle anti-collision method comprises the following steps that S1, distance measuring is conducted on a front vehicle through an ultrasonic distance measuring method; S2, the distance between two vehicles is divided into the reminding distance, the alarming distance and the forced braking distance, and an anti-collision mathematical model is established; and S3, speed information of the vehicles is obtained and substituted into the established anti-collision model, and St, Sw and Sd are calculated; (1) if the distance between the vehicle and the front vehicle is within the reminding distance St, a reminding signal is sent to tell a driver that at this time the two vehicles are too close, and after hearing the reminding, the driver is ready to slow down; (2), when the distance between the vehicle and the front vehicle is within the alarming distance Sw, an alarming signal is sent, and after hearing alarming, the driver is on the alert and pays attention to the driving condition of the front vehicle at any time, so that driving is guaranteed; and (3) when the distance between the vehicle and the front vehicle is within the forced braking distance Sd, a deceleration signal is forced to send to the vehicle to enable the vehicle to reduce the speed to increase the distance between the two vehicles, and the driving risk factor is reduced.

Description

technical field [0001] The invention relates to the technical field of automobile anti-collision, in particular to an automobile anti-collision method. Background technique [0002] With the continuous and rapid development of China's economy and society, and the acceleration of urbanization reform, the masses have a strong demand for car purchases, and the resulting road traffic accidents have also increased significantly. On urban roads and expressways, vehicle rear-end collisions are the main cause of accidents. In order to alleviate the contradiction between limited road resources and per capita car ownership, and reduce personal safety and property losses, research on automatic collision avoidance technology for automobiles It is of practical significance and economic value to detect vehicles, pedestrians or other obstacles that may collide with them and issue an alarm or take measures such as braking or evasion at the same time to avoid collisions. [0003] The car co...

AI Technical Summary

Problems solved by technology

However, ordinary ultrasonic sensors can only be used in parking or reversing anti-collision alarm systems because of their short measurement distances (1-15m). Therefore, research and development of cost-effective ultrasonic ranging sensors are used in automotive active collision avoidance systems. It is of great practical significance to promote the all-round detection of automobiles and the development and wide application of automobile active collision avoidance systems.

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