零延时RS485模块在列车车载防火检测系统中的应用研究

Application Research of Zero-latency RS485 Module During Train On-Board Fire Detection System

摘要:

随着高速列车技术的飞跃发展,车载设备之间的通讯信息、列车的故障检测和诊断信息、车内视频监控信息等信息数据的剧增,对信息承载媒介和通讯接口设备在可靠性和实时性方面提出了更高的要求；通过对RS485模块的研究设计了一种零延时RS485模块,应用于以太网主从式结构的列车车载防火检测系统中,达到实时、高效、安全可靠的设计目的；使用Multisim软件对零延时电路进行仿真验证,结果表明该设计的零延时RS485模块具有可靠的实时性。

Abstract:

With the fast development of High-Speed Train technology as well as the dramatic increasing of the communications between the On-board equipments、the train fault detection and diagnosis information and the video monitoring information which posed a higher requirement to the real-time and reliability of the message baring medium and communication interface. In this thesis , In order to achieve the target of high efficiency、security and reliability , a Zero-latency RS485 module was designed and applied in a master-slave network—The Train On-Board Fire Detection System. The Zero-latency module was modeled with Multisim software. The simulation of Zero-latency module was conducted and the results show that the Zero-latency of The RS485 module were reliable. 