低地板有轨电车乘客信息系统设计与开发

Design and development of passenger information system for low-floor tram

低地板有轨电车为低运量轨道交通车辆,具有公交运输与轨道交通双重属性。随着列车运营对信息服务可靠性、可用性、安全性需求的不断增加,以及嵌入式网络技术的不断发展,对乘客信息系统的设计也在迭代优化。乘客信息系统主要功能为音视频传输,基于嵌入式与多媒体技术为乘客提供信息服务。主要从系统方案、网络拓扑、组播通信以及网络音频广播技术等方面对低地板有轨电车乘客信息系统进行优化设计,实现乘客信息系统的稳定性、延迟率、清晰度的目标。

Low-floor tram is a low-volume rail transit vehicle with dual attributes of bus and rail transit.This paper describes the network design of the passenger information system in detail.The main function of the passenger information system is audio and video transmission,which provides information services for passengers based on embedded and multimedia technology.With the increasing demand for reliability,availability and security of information services in train operation and the continuous development of embedded network technology,the design of the passenger information system is also being optimized.This paper mainly designs the system scheme,network topology,multicast communication,and network audio broadcasting technology in detail to achieve stability,delay rate,and clarity requirements.