基于FX2N的Z3050摇臂钻床电气控制线路技改升级

<正>本文将详细介绍利用PLC来对Z3050型摇臂钻床电气控制线路进行技术改造,以提升机械生产设备的可靠性与技术含量。一、Z3050摇臂钻床电路系统简析1.Z3050摇臂钻床的主要结构Z3050摇臂钻床的实物照片如图1所示。它主要由底座、内立柱、外立柱、摇臂、主轴箱、工作台等部分组成。内立柱     

Z3040摇臂钻床的技术改造研究

故障几率与操作便利是衡量生产机械的重要指标,针对目前Z3040摇臂钻床的控制方法在生产过程中存在的故障几率高、诊断不方便且定位操作诸多不便利的问题深入分析,提出了一种基于PLC与增加固定与定位装置的方案;一方面,将西门子S7-200系列PLC用于Z3040摇臂钻床接触器控制系统技术转换,用软件编程的方法来代替部分继电器—接触器控制电路;一方面,在摇臂钻床的工作台上增加固定与定位装置,用于精准定位和方便操作。经模拟系统运行发现在生产中产生的故障几率有明显下降,也因此而提高了生产效率,降低了因故障而产生的废品数量,从而降低了生产成本,提高了生产利润。     

Z3040钻床控制电路PLC控制方法的研究

阐述了采用可编程控制器(PLC)进行Z3040钻床控制电路教学设备技术改造的方法,简要说明了S7-200系列在本系统中的应用以及PLC控制过程的工作原理,其中包括I/O口的分配、确定I/O点数、设计PLC系统控制程序等几个环节的处理方法。     

关于机械设备PLC技术的分析与设计——以Z3050型摇臂钻床为例

工业用可编程控制器PLC是一种以微处理器为核心的新型工业控制装置,具有功能强大、可靠性高等优点,环境适应能力和抗干扰能力比较强,接线简单,编程灵活方便,因此被广泛应用于工业控制领域。本文以Z3050型摇臂钻床为例,设计分析PLC电路控制技术,仅供参考。     

关于机械设备PLC技术的分析与设计--以Z3050型摇臂钻床为例

工业用可编程控制器PLC是一种以微处理器为核心的新型工业控制装置，具有功能强大、可靠性高等优点，环境适应能力和抗干扰能力比较强，接线简单，编程灵活方便，因此被广泛应用于工业控制领域。本文以Z3050型摇臂钻床为例，设计分析PLC电路控制技术，仅供参考。     

直饮水电气控制系统的PLC改造

对原直饮水系统的电气控制采用三菱PLC进行改造,大大提高了系统的工作效率,增强了系统的可靠性、稳定性和安全性.     

基于PLC的轻轨精整控制系统

介绍了一个基于 PLC 的轻轨精整控制系统.该系统由两个现场操作站、两个PLC控制站和一个监控操作站组成.采用梯形图编制了系统控制软件,程序能够对系统故障情况进行自动判断与处理.通过采用PLC技术对轻轨精整钻床和铣床的电气控制系统技术改造,提高了产品质量,减轻了操作人员的劳动强度.实际应用表明,该系统具有工作可靠、功能完善、易于维护,以及操作灵活方便等特点.     

高速压片机电气控制系统设计

对高速压片机的电气控制系统进行设计改造,采用PLC、变频器和触摸屏通信控制,使高速压片机生产过程具有自动化程度高、操作简单、生产效率高等特点。     

应用PLC改造KD-80罐式蒸布机的控制设计

本文分析了KD-80罐式蒸布机的工作过程和特点,选用了廉价可靠的PLC进行电气控制改造,并注重OMRON-PLC应用程序结构的优化,使改造后的罐式蒸布机运行正常。     

应用PLC改造KD-80罐式蒸布机的控制设计

本文分析了KD-80罐式蒸布机的工作过程和特点,选用了廉价可靠的PLC进行电气控制改造,并注重OMRONPLC应用程序结构的优化,使改造后的罐式蒸布机运行正常.     

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.