【作者】 夏婷；

【导师】 闵华松；

【作者基本信息】 武汉科技大学 ， 计算机应用技术， 2008， 硕士

【摘要】 随着嵌入式技术和网络技术的不断发展,将嵌入式监测设备接入Internet网络进行远程监测正逐步取代传统的监测方案。本文设计了嵌入式远程状态监测系统的总体结构,完成了其核心装置——嵌入式一体化远程监测装置的开发。在硬件设计上,装置采用ARM9微处理器AT91RM9200来构建嵌入式监测中心服务器,扩展以DM9161为核心的网络接口电路来实现系统的Internet网络接入。在软件设计上,采用嵌入式实时操作系统Linux对系统进行有效的任务调度和管理;移植了EtherNet/IP协议,构建起嵌入式CAN-以太网网关,实现了现场总线和工业以太网之间的无缝链接;移植了嵌入式Web服务器BOA建立了网络服务器;采用嵌入式数据库SQLite对大量实时数据进行存储和管理,有效地对数据进行存取、查询等共享操作。在此基础上,采用CGI程序设计技术进行多线程编程,设计并实现了B/S模式的嵌入式Web监测软件,实现了全系统Web化管理。另外,采用Flash技术和UDP套接字通讯技术开发了C/S模式下的Flash监测程序,利用C/S模式良好的交互性和传输速度快的特点,弥补了B/S模式的不足之处。本文的主要特点有:实现了集网关、Web服务器、数据库于一体的便携式嵌入式远程监测装置,可以独立提供远程监测服务,体积小、成本低、使用简便;采用工业以太网技术代替传统的现场总线技术,形成先进、开放的网络体系结构,有利于系统向下兼容成熟的现场总线技术,向上无缝接入办公以太网络;将Flash技术应用到嵌入式监测系统中,解决了监测画面闪烁问题。更多还原

【Abstract】 With the constant development of embedded technology and network technology, the monitoring method by connecting embedded monitoring device to the Internet gradually takes the place of the traditional method. The paper designs the overall structure of the embedded remote monitoring system, and develops its key instrument that is the integrated embedded remote monitoring instrument.In the hardware design, the instrument applies micro-processor chip AT91RM9200 with ARM9 core as the processor of the embedded monitoring server. In order to realize the Internet connecting,the instrument also extends the network interface circuit based on the EtherNet control chip DM9161. In the software design, the instrument adopts the embedded real-time operation system Linux to carry out effective task-schedule and task-management. The embedded CAN-EtherNet gateway is built, which can realize a seamless link between the field-bus and Industrial Ethernet by porting the EtherNet/IP protocol. BOA is ported to set up a web server. Applying the embedded database SQLite, the instrument can manage the mass of data effectively. Based on the software foundation, by applying CGI (Common Gateway Interface) and adopting the multithread, the instrument realizes the embedded web monitoring software in B/S mode. In addition, applying the Flash technology and UDP Socket transmission, the instrument develops the Flash monitoring application in C/S mode due to the fact that the C/S mode has the advantage of good interaction and high translation speed, which can make up the shortage of the B/S mode.This paper has following features: The remote monitoring instrument, which can support remote monitoring service independently, integrates the gateway,web server and database, and it has the advantage of small size, low cost and convenience. It uses advanced industrial Ethernet topology, downward compatibility with fieldbus technology, can be accessed seamless upward to office Ethernet. It applies the Flash technology to solve the problem of webpage flickering on the screen.更多还原