基于PLC和WinCC的玻璃镀膜控制系统优化设计

针对玻璃镀膜生产线工艺特点,根据国内某玻璃镀膜生产线的生产需求,对原有自动控制系统进行了改进和优化设计。基于工艺配气、磁控溅射、真空抽气、阴极电源和伺服传动等各子系统的控制难点及实现过程,优化设计了以西门子S7-400 PLC为核心和WinCC 7.0为上位监控软件的玻璃镀膜控制系统。在WinCC组态软件平台上,搭建了玻璃镀膜控制系统的监控界面,通过上位机处理大量生产过程数据和归档重要参数,实现生产工艺流程各个环节的实时监控、设备工作运行状态的参数显示和系统的故障报警等功能。     

基于S7-400PLC的镀膜玻璃生产线控制系统

针对镀膜工程玻璃生产线工艺复杂,结构庞大,控制参数众多,镀膜过程控制要求响应快、精度高的特点,设计了以西门子S7-400PLC为核心的生产过程控制系统,结合系统结构与硬件配置方案;详细阐述了真空泵、磁控溅射靶阴极电源和玻璃传送伺服电机等子系统的控制策略和特点.给出玻璃长度计算方法和公式,以及位置控制程序流程框图,该系统采用2块独立工作的CPU模块,细化控制任务,提高了编程的灵活性和系统的可靠性.在WinCC组态软件平台上,设计了系统监控软件,上位机处理大量生产过程数据,归档重要参数,实现镀膜玻璃生产过程实时监控.控制系统在现场的成功应用表明,该系统结构合理,功能完善,控制效果好,满足了工程玻璃真空镀膜生产过程自动化的各项要求.     

应用于磁控溅射镀膜生产线的计算机监控系统的设计

介绍了一种成功应用的磁控溅射镀膜生产线计算机监控系统的设计，重点讨论了计算机监控系统的硬件配置、软件设计、通信协议、控制过程实现以及软件编程的控制算法。     

基于PEM的反应磁控溅射镀膜机参数监控系统

实时在线监测磁控溅射反应气体的参数可有效保证镀膜质量;针对反应磁控溅射离子镀膜机反应气体的功能需求,分析了反应气体的控制原理,基于PEM方法提出了控制器方案和反应气体的参数监控方案,分析了监控系统的功能需求,自定义了串口通信协议,基于LabVIEW和串口设计了反应气体的参数监控系统系统,并与设计的控制器用于镀膜工艺试验;试验结果表明,基于PEM方法设计的反应气体参数监控系统功能正确,可为控制器和镀膜机提供参数调控依据,为提高硬质镀膜质量提供了一套有效的监控方法。     

基于组态王的自动生产线监控系统设计与开发

为改善自动生产线工作效率低、质量无法保障的现状，在分析了生产线加工特点后，设计开发了适用于提升自动生产线相应功能的监控系统。采用北京亚控公司的组态王软件，实现模块化功能划分，可以满足生产线数据交换、故障报警及系统报警、历史数据记录及查询、各类报表的生成和打印输出等功能。经验证，该监控系统可以提高自动生产线的便捷性、安全性与可靠性，并且能够保障自动生产线长期有效的运行。     

应用于磁控溅射镀膜生产线的计算机监控系统的设计

肇庆市大力真空设备有限公司生产的DJW（L）系列卧式（立式）磁控溅射镀膜生产线采用DC电源或中频电源控制平面靶、圆柱旋转靶或中频孪生靶在工件上溅射成膜．广泛应用于各种建筑玻璃、ITO透明导电玻璃、家电玻璃、高反射后视镜及亚克力镀膜等行业。该系列生产线在吸收欧洲同类生产线的先进技术和镀膜工艺的同时，融合了独特的操作人性化、使用简便化设计理念，在用户群体中得到了充分的肯定。     

无线镀膜玻璃色差数据实时监测系统的设计

针对玻璃生产线布线困难、电磁干扰强、数据处理效率低的状况,设计了无线镀膜玻璃色差数据实时监测系统;介绍了无线射频收发芯片nRF2401AG的原理及特点,采用了无线通信技术和数据库技术,阐述了将Visual C++6.0作为开发平台,镀膜玻璃色差数据无线收发、实时监测、实时存储、动态显示等实现过程;经实际验证:该系统无线通信稳定可靠、数据处理效率高;满足了工程实际应用需求,具有很好的实用性和推广价值。     

番茄酱生产线罐装工艺远程监控系统设计

论述了Wonderware公司的工业控制组态软件InTouch和实时数据库lnSQL的特点,并以该系统为例介绍了In-Touch和InSQL在番茄酱生产线罐装工艺远程监控系统的应用.其中还涉及MSSQL的应用.该系统可以提高工厂的实时监控能力以及实时数据采集能力,使得工厂效率大大提高.     

WINCC与TI505在水泥工业自动化中的应用

介绍了水泥行业自动化发展的历程,并对水泥回转窑生产线的工艺特点、技术要求进行了分析,给出了组网方案和自动化设计思路。详细介绍了西门子自动化监控软件WINCC,SIMATIC TI505系列可编程控制器在该生产线的应用。实际效果表明,该控制系统表现出高度的可靠性和稳定性,极大地改善了整个系统的操作和控制,满足了生产工艺的要求。     

PLC在电机定子浸漆控制系统中的应用

针对电机定子浸漆生产线的现状,开发了基于三菱PLC的电机定子浸漆监控系统,该系统解决了目前压铸机生产线生产定子过程中出现的信息孤岛问题。本文详细介绍了该控制系统的控制方案,给出了上位机和PLC的具体设计原则。该系统投运之后,达到了规定的设计性能,满足了工艺要求,而且运行稳定。     

Only connect: teaching, technology and telesis

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.     

European Community policy and the market

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.     

一种自适应子融合集成多分类器方法

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。     

Avoiding semantic and temporal gaps in developing software intensive systems

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.     

Designing economic np control charts: A programmed simulation approach

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.     

The development of robot art

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     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.