【摘要】 针对传统油罐车运油的"黑盒子"管理模式分析,提出了一个基于分布式三层架构与智能IC卡电子封签结合的全过程综合管理信息系统设计方案,其系统建模采用了统一建模语言UML对系统进行结构和功能模块设计,编程实现了批量油罐车运油过程的统一集中管理,经济有效地解决了油罐车运油的监管问题.针对IC卡读卡器与PC机通信中存在的问题,利用RS-232串行接口,设计了上下位机的通信协议,同时在Delphi7.0开发环境下采用动态连接库(DLL)实现上下位机的通信.系统还可实现客户端因服务器故障可自动切换服务器的功能.更多还原

【Abstract】 The authors analyzed the "black box" management mode of traditional tank truck,and proposed a scheme of integrated management information system based on the combination of distributed three-tier structure and smart IC card electronic seals.The system modeling uses UML to design system structure and function module.The programming realises the unified management of the batch tank truck in the distrubution process.It is a cost-effective solution to the problem of tank truck supervision and management.With regard to the problem of communication between IC card reader and PC,the authors use RS-232 serial interface to design the upper and lower computer communication protocol,and to achieve the upper and lower computer communication with a dynamic link library(DLL) in the DELPHI 7.0 development environment.Also,the systems achieve the function of automatical switch while there are failure causes to the client server.更多还原