Collision prediction method based on vehicle distance probability distribution for internet of vehicles

Abstract

The invention discloses a vehicle collision prediction method based on vehicle distance probability distribution under a highway model. The method includes the steps of a vehicle periodically (under 10Hz) broadcasts current motion statuses Beacons (speed, acceleration and GPS); the density of vehicles in the surrounding environment is dynamically calculated to build a vehicle distance distribution probability model; a minimum safety distance required to avoid collision when two adjacent vehicles emergently brake is dynamically calculated according the motion status of one vehicle and the motion status of the adjacent vehicle ahead; the collision probability (the probability for the vehicle distance being smaller than the minimum safety distance) of the two adjacent vehicles is calculated according to vehicle distance probability distribution; a multi-vehicle collision Markov chain and a state transition matrix are established, and expectation for the number of vehicle collisions on the whole section at certain time is estimated. The method is high in innovation level and extensibility; the defects of poor GPS data precision and instability in the current vehicle-location-based collision prediction algorithm are well made up; the method plays an excellent role especially in GPS satellite signal blind areas and has promising application prospect.

Description

technical field [0001] The invention belongs to the technical field of the Internet of Vehicles of an intelligent transportation system, and in particular relates to a multi-vehicle collision prediction method based on the probability distribution of inter-vehicle distances in emergency situations. The vehicle collision prediction method can be used to calculate the safety factor of individual vehicles in real time, and can also be used to evaluate the risk of secondary collisions caused by sudden accidents on the entire road section. Background technique [0002] In recent years, as an emerging technology in the field of intelligent transportation, Vehicle Networking (Vehicle Ad-hoc Network, VANET) has attracted the attention of many automobile manufacturers and scholars. 75MHz communication frequency band. In VANET, each mobile vehicle has the ability of wireless communication. Under normal circumstances, it periodically broadcasts Beacons messages containing its own moti...

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Problems solved by technology

[0004] Although the literature [C.Garcia-Costa, etc, "A stochastic model for chain collisions of vehicles equipped with vehicular communications", IEEE Transactions on Intelligent Transportation Systems, vol.13, no.2, Jun.2012] gives a A stochastic model for predicting multiple vehicle collisions, but since various input variables in the model are assumed to be random variables, it cannot be effectively applied to real-time prediction of multi-vehicle collisions in the actual Internet of Vehicles

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