一种利用无线地磁节点的智能停车诱导系统

Parking Guidance and Information System Based on Wireless Magnetic Node

针对大城市日益严重的停车难问题,本文设计并实现了一种基于无线传感器网络的智能停车诱导系统,以帮助用户快速找到合适的停车位.本系统采用无线地磁节点监测停车位状态,并通过无线传感器网络与有线局域网相结合的方式进行数据传输.为了满足停车场应用场景的低功耗要求,提出一种基于汇聚树协议(Collection Tree Protocol)的路由协议P-CTP,用以最小化无线传感器网络数据传输的能量消耗,提高系统的生存周期,并保证无线数据传输的可靠性.本文描述了系统的整体架构,并对监测模块的软硬件实现及P-CTP协议的原理与实现进行了详细介绍与分析,通过原型系统实验,评估了系统的能量消耗、丢包率和网络延时等.实验结果表明,系统性能能够满足停车场应用的需求.

To cope w ith theever grow ing parking problem ofmetropolises,this paper designs and realizes a parking guidance and information system based on w ireless sensor netw ork（ WSN） for helping users quickly find a suitable parking space. In this system,w ireless magneticnodesare used to monitorstates of parking spaces and the monitored datais transmitted by an integration of WSN and w ired local area netw ork. To meet the low pow er requirement in parking scenarios,an improved Collection Tree Protocol（ CTP）,named P-CTP,is proposed. P-CTP is able to minimize energy consumption of w ireless communication in WSN,prolong the lifetime of the system,andensure the reliability of w ireless data transmission. The paper describes the overall system framew ork and gives a detailed introduction and analysis aboutthe implementation of hardw are and softw are in monitoring module as w ell as the principle and realization of P-CTP. Through the prototype experiments,w e evaluate performance of the system including energy consumption,packet loss rate and netw ork delay,etc. The results show that performance ofthe system can satisfy requirements of parking application w ell.