自动检票系统设计及其实现

概述国内外自动检票系统的发展现状,提出按地区中心计算机系统—车站计算机系统—自动检票机三层体系结构构建中国铁路的自动检票系统,论述各子系统的功能划分和软件模块的构成与设计。提出:采用纸质磁卡票作为单程票,非接触IC卡票作为储值票;采用对称和非对称加密方法实现设备间的身份认证和通信数据的加密,以保证自动检票机与车站服务器之间通信的安全;采用嵌入式实时操作系统来保证自动检票机的实时性和可靠性;采用基于优先级的抢占式任务调度方式处理自动检票机软件各任务间的关系,检票交易数据的处理时机与数据量因子和时间间隔因子相关。

Design and Realization of Automatic Ticket Checking System

The actuality of the automatic ticket checking system is introduced in this paper. A system with 3-level structure (regional center computer system, station computer system and automatic ticket checking system) for national railway is put forward. The function division and software modules of its subsystem are described. As conclusion, this paper proposes that paper magcard be used as single trip ticket, contact-less smart card be used as save-money card. Symmetrical encryption and dissymmetrical encryption are adopted to realize identity confirmation and communication data security. Embedded real-time operation system is used to ensure its reliability and real time quality.The relationships of processes is arranged based on PRI dispatching. The time for dealing with business data is relative with the quantity of data and time interval.