基于TCN的列车智能显示单元设计与实现

发布时间：2018-01-15 07:15

本文关键词：基于TCN的列车智能显示单元设计与实现　出处：《华东交通大学》2012年硕士论文　论文类型：学位论文

【摘要】：列车智能显示单元（IDU）是列车监控系统的重要组成部分，为列车提供一个实时的人机信息交互界面，主要负责监测列车运行当中的设备状态信息及故障信息，由工作人员据此作出相关的控制操作。它的可靠性和稳定性直接影响着整个监控系统是否能够正常运行。 IEC61375是专门针对列车通信网络（TCN）中通信设备进行数据通信而制定的一项标准。从总线拓扑结构上来看，列车通信网络包括上下两层：下层是用于连接同一车辆内不同设备的多功能车辆总线（MVB），上层是用于连接不同车辆各个节点的绞线式列车总线（WTB）。而列车智能显示单元（IDU）实际上是挂接在MVB上的第三类设备。因此，IDU必须要能够支持MVB接口。本系统研究的列车智能显示单元实际上是在MVB网卡的基础上进行的再开发。硬件部分，列车智能显示单元在采用S3C2440的基础上，结合系统设计需求，扩展了核心电路和部分关键的外围接口电路，主要涉及到电源模块、存储器模块、液晶屏模块、键盘模块。之后，对已经测试成功的MVB网卡进行了功能及设计框图的简要说明。软件部分，列车智能显示单元采用Linux作为系统开发平台，选用Qt/Embedded，完成了系统监控界面的设计。本文完成了部分接口模块的驱动程序，并详细分析了MVB网卡的软件实现方案。重点研究了TCN通信协议在Linux环境下的实现，根据IEC61375标准，，借助Linux系统的相关机制，完成了通信部分的软件设计。
[Abstract]:Train Intelligent display Unit (IDU) is an important part of the train monitoring system, which provides a real-time human-computer information interface for the train. It is mainly responsible for monitoring equipment status information and fault information during train operation. The reliability and stability of the control system directly affect the normal operation of the whole monitoring system. IEC61375 is a standard for data communication of communication equipment in train communication network. From the point of view of bus topology. The train communication network consists of two layers: the lower layer is a multifunctional vehicle bus (MVB) for connecting different devices in the same vehicle. The upper layer is a stranded train bus used to connect various nodes of different vehicles. The train intelligent display unit (IDU) is in fact the third type of equipment connected to the MVB. IDU must be able to support the MVB interface. In fact, the train intelligent display unit studied in this system is redeveloped on the basis of MVB network card. In the hardware part, on the basis of adopting S3C2440, the core circuit and some key peripheral interface circuits are extended, mainly involving the power supply module. Memory module, LCD screen module, keyboard module. After that, the function and design block diagram of the MVB network card which has been successfully tested are briefly described. In the software part, the train intelligent display unit adopts Linux as the development platform and Qt/Embedded as the system development platform. Completed the design of the system monitoring interface. This paper completed part of the interface module driver. The software implementation scheme of MVB network card is analyzed in detail, and the implementation of TCN communication protocol in Linux environment is emphatically studied, according to IEC61375 standard. With the help of the related mechanism of Linux system, the software design of communication part is completed.
【学位授予单位】：华东交通大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.1;TP311.52

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