Early warning and protection system for rear-end collision in expressway and control method

Abstract

The invention discloses an early warning and protection system for rear-end collision in an expressway and a control method. The early warning and protection system comprises a driver road condition selection module, an environmental monitoring module, a master control module and an execution module. Driver road condition selections comprise a dry road surface, a wet road surface and an ice and snow road surface. A driver selects corresponding switch positions according to the practical road surface situations, a laser range finder measures the distance between a vehicle of the driver and a rear vehicle in real time; a real-time critical safety following distance obtained according to the distance information, speed information of the vehicle, and the road surface selection switch position information is compared with the measured practical following distance; and a high brake lamp and an active safety headrest trigger unit are turned on according to the danger level. The early warning and protection system reduces the probability of rear-end accidents in the expressway to the greatest extent, and minimizes injuries of drivers and passengers when the rear-end accidents happen.

Description

technical field [0001] The invention belongs to the field of automobile safety, and in particular relates to a system for preventing rear-end collisions of own vehicles on expressways and a system for taking active self-protection measures for impending collisions. Background technique [0002] In recent years, with the continuous growth of car ownership, car road traffic accidents are on the rise year by year. In various traffic accidents, rear-end collisions account for a high proportion. According to the survey, the number of rear-end collisions on expressways in China accounts for about 33.6% of the total number of accidents, and the economic losses caused by them account for about 40% of the total. On the one hand, the complex and changeable driving conditions on the expressway make it very unlikely that the rear-end vehicle will take active collision avoidance measures when a rear-end collision occurs. Therefore, the early warning of rear-end collision prevention on t...

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Problems solved by technology

[0003] The present invention aims at the above-mentioned single rear-end collision warning, one-sided highway driving safety distance setting method and active safety headrest start-up lag that have a significant impact on rear-end collision prevention, and provides a highway rear-end collision early warning and protection Effectively combined system and control method, the system can use the driving environment monitoring module to monitor vehicle conditions and road condition information in real time, and accurately judge the degree of danger of the vehicle behind in real time according to the preset control algorithm, and then warn the vehicle behind before a rear-end collision occurs And carry out active protection for the driver and occupants of the judged inevitable rear-end collision

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