Adverse Weather Monitoring And Traffic Control System Based On WSN

Adverse weather is one of the main factors that caused freeway accident.It contributed a quarter amoun to the total.To avoid or reduce the amount of accidents, freeway environment monitor systerm must to be set up to gather the information along the high and to make the traffic control plan based on the informatiom.As one of the most important of 21th, WSN has distinct odds in highway inclement weather monitoring.The author introduced the WSN to the management of freeway,use the WSN to monitor the adverse weather condition of road,and desgined a Adverse Weather Monitor and Traffic Cotrol System Based on WSN, studied on its key technologies.As the results,the author designed a mutti SINK nods WSN,break through the limit of traditional WSN's single SINK nod,to match the needs of superhighway adverse weather monitor.Proposed the concept of mutti-direction data trasffer of WSN,and carried out the Mutti-Derected Difussion(MDD) routing protocol to satifi the Mutt SINK nods WSN's data trasffer.Also studied on power management,time sync,and netword security,proposed solution draft all of them,extend the using time of system,insured security of system data trasffer.The paper also analysed the adverse weather influence on freeway traffic causionly,achievied that the influence of inclement weather on super highway focused on two aspects: safe sight distance and adhesion coefficient.After gathering and studing on other scholar'reseaches,proposed a adverse weather freeway safty model based on stopping sight distance, finaly,caculated a adverse weather freeway traffic control model based on membership function of vague mathematics.The simulation proved that:using WSN to monitor freeway weather conditation if feasible;mutti SINK nods WSN can satisfy the needs of freeway adverse weather monitoring system better than single SINK nod WSN;MDD is a stable and reliable protocol which can meet the needs of mutti direction data transfer of freeway adverse weather monitoring system;the results of adverse weather freeway safty model based on stopping sight distance and adverse weather freeway traffic control model based on membership function of vague mathematics tally closely with the regulations of the Ministry of Public Security and The Ministry of Transport.