Forward collision avoidance pre-warning algorithm taking feature of driver response differences into consideration

Abstract

The invention relates to a forward collision avoidance pre-warning algorithm taking the feature of driver response differences into consideration. The algorithm is applied to the field of active safety of vehicles, and achieves the forward collision avoidance pre-warning function by predicting the response deceleration of drivers, working out the safety distance value by which the drivers can avoid a collision according to the kinematics theories on the basis of a hypothetical pre-warning response time value, and giving a pre-warning message to the driver of a back car when the actual distance between a front car and the back car is shorter than the safety distance. The algorithm works out the brake distance needed for avoiding a collision based on the actual vehicle motion state and has higher accuracy and reliability compared with a danger sensing algorithm. Besides, the algorithm allows the driver response time, the brake deceleration and other parameters to be adjusted in order to take the feature of the driver response differences into consideration.

Description

technical field [0001] The invention relates to the field of vehicle active safety, in particular to a forward collision avoidance early warning algorithm considering the difference characteristics of different drivers' responses. Background technique [0002] Rear-end collisions account for about 40% of road traffic accidents, and account for nearly 50% of fatalities. It is the most frequent and the most costly of all types of traffic accidents. Forward collision avoidance warning system can effectively reduce rear-end collision accidents. The forward collision avoidance warning system uses sensors to detect the road and movement conditions in front of the vehicle, and when there is a potential collision risk ahead, it will give the driver early warning information at an appropriate time, thereby assisting the driver to avoid accidents more effectively. [0003] The forward collision avoidance warning algorithm is the core element of the forward collision avoidance warning...

AI Technical Summary

Problems solved by technology

[0004] The existing forward collision avoidance warning algorithm mostly assumes that the driver adopts a fixed deceleration to brake in the near-collision condition, and fails to take into account the difference in response between different drivers and the same driver in different emergency conditions. In addition, the existing forward collision avoidance warning algorithm is mostly developed based on the braking behavior data of foreign drivers. Due to the differences in driving behavior and traffic environment of domestic and foreign drivers, it is suitable for foreign forward collision avoidance Early warning algorithm may not be applicable to Chinese drivers

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