Research And Implementation Of Vehicle Collision Avoidance Warning System Based On V2X Communication

With the increasing number of vehicles and the rapid development of road traffic,the problem of road safety is becoming more and more serious.Current detection methods include ultrasonic,electromagnetic wave,radar,machine vision and so on.But these sensors have some problems,such as single detection direction,blind detection area,unable to achieve long-distance transmission and their respective limitations,which have been unable to meet the current needs.With the advent of V2 X communication,collision prevention and warning system based on vehicle communication has attracted the attention of many scholars and research institutions.Every vehicle with workshop communication function is a mobile sensor.It can detect the information of self-driving and surrounding traffic state in real time and accurately,and send the information of self-driving motion to surrounding vehicles through DSRC wireless communication module.The combination of V2 X technology and vehicle collision warning is of great significance to improve driving safety.This paper design a vehicle anti-collision early warning system based on V2 X communication.This system can realize wireless communication in workshop,collect information of vehicle motion state,and make early warning decision after vehicle information processing,so as to remind drivers of potential safety hazards,so as to avoid collision.The main work of this paper are summarized as follows::1)Research and design the overall scheme of V2 X communication anti-collision early warning system.According to the application background and actual demand,DSRC communication is selected as the communication protocol of wireless communication module,IEEE 1609.3 and SAE J2735 protocols in WAVE protocol stack are emphatically studied.The hardware and software design scheme of the system is proposed to complete the collection,interaction,processing and early warning functions of vehicle information.2)Analyzed the shortcomings of the traditional TTC early warning algorithm,improved the anti-collision warning algorithm,considered the influence of speed,acceleration and other characterization parameters,decomposed the state characterization parameters to analyze the horizontal and vertical vehicle motion,and established a Kalman filter collision based on the improved CA model.Predictive model;for the limitations of fixed thresholds,an adaptive early warning time threshold model is established.The effectiveness of the model is verified by the combination of Prescan and matlab/simulink,and compared with similar algorithms.The results show that the improved algorithm has higher warning accuracy and lower false alarm rate and missed alarm rate.3)The hardware platform of V2 X system is built,including main control module,DSRC wireless communication module,GPS module,CAN bus module,interface module and power module.On the basis of in-depth analysis of IEEE1609.3 protocol,which is the core of V2 X communication,and SAE J2735 protocol in application layer,the CAN data acquisition module,GPS positioning module,BSM message sending and receiving module and encoding and decoding module in software architecture are designed and implemented.The interactive vehicle information is pre-processed and input into the anti-collision early warning algorithm to display the early warning information in the terminal interface.4)The whole function test of the system.It mainly tests the receiving function of GPS positioning data acquisition module,communication function of CAN bus module,data receiving and receiving function of DSRC wireless communication module and anti-collision warning function are tested.The results show that the designed system can meet the requirements.