Research On Highway Driver’s Anti-collision Decision-making System Based On Wireless Network Technology

With the rapid development of highway, traffic accidents on the highway arehappening in an increasing frequency. The typical accident is the rear-ends collisionaccidents，and The study found that, the development of automotive pileup warningsystem could prevent a majority of rear-ends collision accidents effectively. Priorresearches on vehicle collision avoidance system are mostly aimed to one vehicle. Inview of this, this paper made a study about highway driver decision-making forcollision avoidance system based on the inter-vehicle communication technology.As a new technology in wireless data transmission network, ZigBee is able tosatisfy the communication between vehicles very well. so ZigBee technology usedin vehicle communication, is able to transmit the information, such as the real-timevehicle speed, acceleration and other information easily, which can make to thecollision warning system so that it can get the information of current running state ofvehicle timely and accurately. this paper, on the one hand, summed the running statesin rear-end collisions between two vehicles up into three kinds of running state invehicle collisions with the human, vehicle, road and other factors integrated, andconstruct three anti-collision safe distance models based on the inter-vehiclecommunication, then made simulation analysis of the velocity, acceleration, the roadadhesion coefficient and other affecting factors with the models. On the other hand,have established the passing safety distance model based on the analysis of dynamicpassing process of two cars in the same direction and the same lane around.The system of vehicle-board ZigBee master node part, mainly composed of acollection node and gathering node. In this system, transmit information of themeasured speed and acceleration of the vehicle to the gathering node through theZigBee. the main control chip of vehicle-board ZigBee calculates the theoreticalsafety distance and passing distance according to the anti-collision safety distancemodel and passing distance model established. At the same time the real distancebetween two cars, measured by the vehicle-board millimeter wave radar, is alsotransmitted to the vehicle nodes. then, the master control chip of node in caranalysises and judges the running state of the car, Thus provides decision-makingtimely and effectively for drivers in emergency situations.In order to realize the function, this paper designed hardware and software ofthe collection node, gathering node, speed collection node, acceleration collectionnode and radar-measured range unit. Finally, this paper also introduced simulationprogram design of the anti-rear, passing and passing judgment decision scheme, and designed a driver assistance decision system scheme and gave simulation interfaceprocedures and steps. System interface simulation results showed that the systemcould provide decision-making information for drivers during driving process andhave an certain positive significance in preventing traffic accidents one the highway.