A vehicle forced deceleration system and control method based on minimum safety distance

Abstract

The invention discloses a vehicle forced deceleration system based on the minimum safety distance, which includes a vehicle distance monitoring unit, a vehicle speed monitoring unit, a data processing unit and a control execution unit; the vehicle distance monitoring unit includes a front range finder and a rear range finder; The monitoring unit includes a vehicle speed sensor, a front speedometer and a rear speedometer; the data processing unit includes a minimum safety distance calculation module, a first judgment module, a second judgment module and a braking deceleration calculation module; the control execution unit includes a prompting device, The main control module, the engine power control module and the braking module; the present invention also relates to a control method for forced deceleration of the vehicle based on the minimum safety distance, and accurately calculates the minimum safety distance between the vehicle and the front and rear vehicles through the minimum safety distance between the vehicle and the front and rear vehicles. The optimal braking deceleration of the distance, when controlling the following distance and vehicle speed, improves driving safety and reduces the risk of traffic accidents caused by vehicles following vehicles in expressway maintenance work areas.

Description

technical field [0001] The invention relates to a vehicle forced deceleration system and a control method, in particular to a minimum safety distance-based vehicle forced deceleration system and a control method, belonging to the fields of traffic safety and dynamic traffic control. Background technique [0002] With the rapid development of my country's economy, the number of vehicles keeps increasing, resulting in a rapid increase in expressway traffic volume, aggravating the aging of expressways and reducing their service life. In order to ensure an efficient, fast and safe driving environment on the expressway, it is necessary to carry out maintenance and repair operations on the expressway regularly. However, some lanes need to be closed during expressway maintenance work, and vehicles need to follow vehicles through the expressway maintenance work area. However, due to the complexity of the traffic environment and the driver's inaccurate judgment on the safety distanc...

AI Technical Summary

Problems solved by technology

However, due to the complexity of the traffic environment and the driver's inaccurate judgment on the safety distance, the following distance is too small, which leads to serious traffic accidents

[0003] Chinese patent (CN 106114422) discloses a control method for an autonomous car-following system and its minimum safe inter-vehicle distance. The system is provided with a front collision avoidance millimeter-wave radar installed in front of the vehicle, which outputs signals to the main control unit via the CAN bus, and then The main control unit outputs signals to the alarm reminder unit and the brake-by-wire unit. This invention is limited to use on urban roads, and does not take into account whether the vehicle collides with the rear vehicle when braking, and does not consider whether the lane-changing distance is too short and the The system itself has certain limitations due to the collision of the rear vehicle, and it cannot be applied to the situation where there are many vehicles in the maintenance work area of ​​the expressway and it is impossible to change lanes

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