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《微型机与应用》2019,(7):6-13
工业是一个国家的根本的经济命脉,工业控制系统(Industrial Control Systems,ICS)是工业自动化体系结构的重要组成部分。随着工业4. 0时代的到来,工业网络的安全性日益重要。工业以太网EtherNet/IP协议使用原有的基于标准的以太网技术,已经被大量使用在工业网络控制系统中,其安全性一直备受关注,国内对工业网络协议安全性的研究很少。使用形式化分析工具Scyther在Delov-Yao模型和强安全模型下对EtherNet/IP协议核心成员通用工业协议(Control and Information Protocol,CIP)所采用的加密认证TLS协议进行形式化分析。对下一代CIP协议嵌入TLS1. 3具有实践价值,该方法对其他工业网络协议进行有效的安全分析有理论指导意义。 相似文献
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工业以太网已经成为控制系统网络发展的主要方向.文中所介绍的EtherNet/IP协议是一种优良的工业以太网方案.由于它采用了CIP协议及新的生产者/消费者的通信模式,使得控制网络设备能够更有效地传输数据,更容易与Internet/Intranet集成.同时,它是一种面向对象和开放性的控制网络方案,采用这种方案的控制网络具有较好的一致性,能够解决控制网络中互操作的难题. 相似文献
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本文提出基于EtherNet/IP协议的交互式机器人控制系统,该控制系统可广泛应用在自动化控制、工业生产自动化设备等领域,例如码垛、焊接、装配、切割等自动化设备。该控制系统包括以太网模块、控制柜控制模块、机器人运动模块、EtherNet/IP协议模块、地址功能映射模块、功能调用模块、机器人控制模块,通过EtherNet/IP协议与可编程逻辑控制器(PLC)通讯,以控制机器人或获取机器人相关参数数据。该控制系统利用以太网硬件使用广泛、PLC生产领域使用普遍等优点,可减少机器人硬件成本和培训成本,提高控制灵活性和通讯灵活性,广泛应用于工业自动化领域。 相似文献
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基于ZigBee的无线传感网络网关的设计 总被引:1,自引:0,他引:1
文章介绍了一种基于ZigBee协议的无线传感器网络的网关设计整体方案.以Intel PXA270为核心处理器,处理器通过以太网接入芯片、GPRS模块、符合IEEE802.15.4协议的CC2430射频芯片,分别接入以太网、GPRS网络和无线传感器网络.移植精简的嵌入式TCP/IP协议,分析Z-Stack协议栈,实现两种... 相似文献
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普永金 《国内外机电一体化技术》2009,(8):25-27
随着企业信息化、网络化的需求发展,许多生产企业需要从工厂信息层到工厂现场网络信息的无缝集成。EtherNet/IP的工业以太网技术系统网络结构,基于工业以太网的组件化设备控制制丝线控制系统,易于集成扩展、维护方便,其应用表明,EtherNet/IP工业以太网可以满足制丝线现场设备控制的实时性和可靠性。 相似文献
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为实现设备间数据的以太网传输,对TCP/IP协议进行深入了研究,设计了基于FPGA和PHY物理层芯片88E1111的千兆以太网数据传输系统.系统采用硬件描述语言实现以太网传输协议,并利用Xilinx提供的M AC以太网控制器IP核完成帧校验和封装,物理层实现采用88E1111芯片.结合系统设计需求对TCP/IP以太网数据协议进行裁剪,仅保留UDP协议、IP协议和ARP地址解析协议.经测试,千兆以太网能够稳定、高效地实现数据传输. 相似文献
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基于VPN和EIP的远程监控系统设计与实现 总被引:1,自引:0,他引:1
随着远程监控技术在生产生活中得到越来越多的应用,对远程监控系统展开研究是很有意义的事情。该文提出了一种远程监控系统,基于VPN技术实现跨越因特网与远程现场的数据连接,基于EtherNet/IP工业以太网协议实现远程客户端数据接口,最终实现远程监控。该系统利用OpenVPN协议建立数据通道,在OpenVPN服务器端通过RADIUS进行远程认证和用户管理;远程客户端通过OpenVPN客户端实现远程登录,利用EtherNet/IP协议实现与远程控制器的数据通信,在开发的监控界面下对远程设备进行监控。经过测试系统可以很好地实现远程监控,是一种可行的远程监控实现方案。 相似文献
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S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained. 相似文献
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European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven. 相似文献
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融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。 相似文献
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张涛 《计算机测量与控制》2015,23(1):86-89
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值. 相似文献
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Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them. 相似文献
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This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives. 相似文献
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潘丽 《自动化与仪器仪表》2014,(7):80-82
自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。 相似文献
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Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what
is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic
sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and
its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of
an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify
robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can
or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest.
This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January
31–February 2, 2008 相似文献
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Jacob Palme 《Software》1979,9(9):741-747
The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users. 相似文献