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Documents 基于无线网络的电子不停车计费技术的研究
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  • Author Author: sophie0love
  • Date Created: 21 Nov 2010 2:37 AM Date Created
  • Last Updated Last Updated: 9 Nov 2021 4:50 PM
  • Views 383 views
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基于无线网络的电子不停车计费技术的研究

电子不停车计费系统已成为智能交通运输系统的一个重要组成部分,各国都把不停车计费系统作为智能交通运输领域最先投入应用的系统来开发。国内近年来也十分关注电子不停车计费系统的开发,急需开发一种适应国内交通收费管理方式的不停车计费技术。本论文在对国内外相关技术的深入研究后,结合新兴的ZigBee短距离低速无线个域网络技术,提出了基于无线网络的电子不停车计费技术的研究。 本文首先从电子不停车计费系统的实现方式入手,设计了系统的总体方案和运行流程。再根据系统方案的功能要求开发了基于ETC无线模块和射频IC读卡器组成的车载设备(OBU),以及具有GPRS功能模块的路侧设备(RSU)的硬件系统。为提高无线通信的稳定性,深入的研究了ZigBee无线网络的路由技术,提出将ZigBee路由算法应用到ETC系统无线网络中,实现了网络覆盖面的扩展和网络通信的可靠性。针对车辆距离测量问题,设计了基于RSSI的距离推算方法,并对测量结果进行数学模型的校正,试验数据证明了该方法的可行性。然后根据各设备节点在无线网络中承担的任务,设计开发了基于ZigBee2006协议栈(Z-STACK-CC2430)的软件系统,实现了短距离无线组网、无线数据收发、射频IC卡读写等功能。 最后,对所设计的各部分功能模块进行试验与测试,测试结果检验了系统设计的可行性。

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