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Documents 基于工业以太网的数控机床DNC通信系统研究与开发
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  • Author Author: sophie0love
  • Date Created: 28 Nov 2010 3:25 AM Date Created
  • Last Updated Last Updated: 9 Nov 2021 4:53 PM
  • Views 457 views
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基于工业以太网的数控机床DNC通信系统研究与开发

DNC(Direct Numerical Control或Distributed Numerical Control)是一种车间级数控机床组网与通信的技术,它具有投资小、见效快等优点。尤其FMS(Flexible Manufacturing Systems)被实践证明具有物流投资大、建设周期长等弊端后,DNC更是得到了快速地发展,它是一种适合我国制造企业实际情况的车间自动化技术方案。 DNC通信系统是DNC其它功能实现的基础。本论文首先研究了传统的DNC通信系统常使用的通信技术,如串行通信技术和现场总线技术,并分析了它们实现DNC通信的优势和不足;然后介绍了一种当前发展较新的DNC通信系统方案——采用局域网技术实现DNC通信。针对串行通信技术和现场总线技术实现DNC通信系统的不足,论文提出采用工业以太网技术实现DNC通信。论文从工业以太网的确定性、实时性和安全性等方面,论述了工业以太网技术应用到DNC通信系统中的可行性,设计了基于工业以太网技术的DNC通信系统的硬件实施方案,包括网络拓扑、硬件构成和各组成部分的作用。 在上述工作的基础上,重点研究了采用套接字技术实现网络通信的方法,给出了实现一个套接字对象在多个对话框中共用的解决办法,并在网络的应用层设计了本DNC通信系统的通信协议;为了使DNC服务器能够同时响应多个客户的请求,着重研究了基于多线程技术的套接字编程技术,并采用线程同步控制技术实现了线程间的同步。使用MFC(Microsoft Foundation Class)开发了一个DNC通信系统,此DNC通信系统包括服务器端和客户端应用程序,实现的主要功能有:数控加工代码的下载和上传、在线加工、工艺文件的下载和上传、用户管理、权限管理和日志管理等。 最后,为开发的应用程序设计了测试方案,在单用户和多用户两种状态下,验证了开发的DNC通信系统能够满足设计要求,系统运行稳定。

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