【作者】 刘涛；

【导师】 王孝良；

【作者基本信息】 大连理工大学 ， 检测技术与自动化装置， 2007， 硕士

【摘要】 计算机和网络技术和发展，引发了控制领域深刻的技术变革，控制系统结构向网络化、开放性方向发展将是控制系统技术发展的潮流。工业以太网作为一种新兴、统一、快速发展的标准，已经在工业企业综合自动化系统中的资源管理层和执行制造层广泛应用，同时呈现出向下延伸直接应用于工业控制现场的趋势。目前现场总线多标准并存的现状导致的标准不统一和设备的兼容性问题，是现场总线亟待解决的问题之一。将工业以太网应用于现场级控制成为近年来工控领域的研究热点。工业以太网标准的建立刚刚开始，获得普遍承认的国际性工业以太网的标准还没有制订出来。已有的现场总线标准仍将在较长的时间内主导市场。嵌入式网关是实现以太网与现有总线系统集成的关键环节。本文探讨了一个基于Linux的工业协议转换网关的设计与实现。在嵌入式系统的基础上完成Modbus现场总线协议、CAN总线协议与Modbus╱TCP工业以太网协议的转换的功能。首先，论文介绍了现场总线的现状和以太网的发展现状；对国内外工业以太网标准的制订情况做了概述。其次，论文介绍了协议转换网关模型及系统的整体设计架构。接下来三章我们详细说明了本嵌入式工业网关的硬件设计与软件设计的实现过程，给出了部分电路原理和硬件驱动的详细实现说明，并有选择的介绍了课题中应用到的相关协议，对各协议模块的实现过程进行了详细说明，最后介绍了嵌入式WEB服务器的实现过程以及如何通过WEB服务器进行系统配置，进行程序在线升级。第七章本文对双机冗余容错技术应用于协议转换网关进行了探讨。最后，论文对本课题进行了总结讨论，指出了后续工作中应努力提高和改善的地方。更多还原

【Abstract】 The development of computer and network technology brings the profound technique evolution in the field of control. Networking and opening will become the main trend of construction of control system. Ethernet for industry as a new, uniform and fast developing standard, has been used widely in resource manage layer, executing layer and manufacture layer of industry corporation integrative automatization. And it also trends to extend to the area of industry fieldwork control. The field-bus’ actuality of multi-standard coexisting causes problems of the compatibility of product devices. It is also one of the problems that people must deal with immediately. So, Ethernet for industry fieldwork control will become a hotspot of the industry control.The standard of Ethernet for industry has not been established .The existing fieldbus standards will still lead the market. Embedded gateway is the key point in the integration of fieldbus and Ethernet.This paper discusses designing and realization of an embedded industry protocol convert gateway based on Linux. It can carry out the conversion among Modbus/TCP protocol, Modbus protocol and CAN protocol.Firstly, the paper introduces actuality of field-bus’s and Ethernet’s. It also tells something about founding criterion of Ethernet for industry in the world.Secondly, the paper introduces a protocol conversion gateway model and the overall design of system architecture. In the next three chapters, the hardware and software implementation of the gateway is introduced, including some circuit design, detail hardware drivers design, related protocol used in the paper, protocol models design, embedded WEB server design , system configuration and process upgrades online. In chapter seven, dual fault-tolerance technology is discussed, for the reliability.In the end, the paper summarizes the subject, pointing out that the follow-up work need to be enhanced and improved.更多还原