烧结主抽风机自动控制系统的设计与应用

介绍了安钢烧结机主抽风机同步电动机自动控制系统的设计和应用情况。根据各项技术参数表明所采用的液阻起动方式、KGLF-2C型励磁装置和采用PLC自动控制系统性能稳定,运行可靠,具有广泛的应用前景和推广价值。     

基于IFIX和施耐德PLC的燃煤锅炉控制系统

为了提高工业燃煤锅炉控制的自动化水平和安全生产,运用先进的自动化技术、计算机技术和网络通讯技术对工业锅炉进行监控和管理具有重要意义。本文采用QUANTUMPLC,IFIX4．0组态软件和工业以太网通讯技术相结合,研发了工业燃煤锅炉控制系统,利用Concept2．6编程软件设计锅炉控制的梯形图,实现了水位三冲量、燃烧过程和蒸汽压力自动控制等功能。工业以太网通讯连接实时性能较好,数据传输率很高。采用IFIX4．0组态软件编写的监控程序具有功能完善、操作简便、可视性好、人机对话功能强等优点。     

QUANTUM PLC双机热备技术在首钢迁钢公司7000风机自控系统中的应用

鼓风机担负着为高炉提供动力能源的重要任务,因此.要求鼓风机控制系统要具有非常高的稳定性和安全性,特别是选择技术成熟,稳定性好的控制系统尤为重要。本文一方面详细介绍了QUANTUM PLC双机热备技术在首钢迁钢公司7000风机自动控制系统中的应用,包括主要设备的选型,软硬件的组态,重要参数的设定等,另一方面还结合7000风机的应用实例,剖析了双机热备系统在使用中常见的问题和处理方法。     

Quantum mechanochemistry understanding of tribochemical reactions

Abstract

The conceptual framework of quantum mechanochemistry for tribochemical and mechanochemical systems has been developed that is constructed from density functional theory, Lewis acid-base theory (particularly Lewis acid-base reaction chemistry theory), minimisation of energy gaps of solids (metals and non-metals) and frontier molecular orbitals of chemical systems (atoms, radicals, ions, molecules and macromolecular assemblies) under shearing stress, and exoelectron emission in sliding contacts. Quantum mechanochemistry is oriented to understand fundamental issues in tribochemistry and lubrication chemistry, and to formulate tribochemical design principles for lubrication excellence of tribochemical systems. Quantum mechanochemistry concepts and principles are also expected to shed light on the interaction chemistry of additive components and packages in lubricants for tribometric addition and synergism.     

ATV58变频器在烧结配料MB+网中的控制

介绍了ATV58在烧结配料MB 网中的硬件构成、组态,软件控制及自动控制的方法.     

New research trends on high-precision time transfer technology

High-precision time transfer plays an important role in the areas of fundamental research and applications. Accompanying w ith the remarkable improvements in the ability of generating and measuring high-accuracy time-frequency signal,seeking for new time-transfer techniques betw een distant clocks w ith much further improved accuracy attracts attentions w orld-w idely. The time-transfer technique based on optical pulses has the highest precision presently,and the further improvement in the accuracy is heavily dependent on the time-domain properties of the pulse as w ell as the sensitivity of the applied measurement on the exchanged pulse. The application of optical frequency comb in time transfer for a precision up to femtosecond level are currently the focus of much interest,and has recently achieved many breakthroughs. Further investigations show that,utilizing quantum techniques,i.e. quantum measurement technique and quantum optical pulse source,can lead to a new limit on the measured timing information. Furthermore,it can be immune from atmospheric parameters,such as pressure,temperature,humidity and so on.Such quantum improvements on time-transfer have a bright prospect in the future applications requiring extremely high-accuracy timing and ranging. The potential achievements w ill form a technical basis for the future realization of sub-femtosecond time transfer system.     

基于PLC和IFIX的燃煤启动锅炉控制系统

为了提高工业燃煤锅炉控制的自动化水平和安全生产,运用先进的自动化技术、计算机技术和网络通讯技术对工业锅炉进行监控和管理具有重要意义。本文采用QUANTUM PLC,IFIX4．0组态软件和工业以太网通讯技术相结合,研发了工业燃煤锅炉控制系统,利用Concept2．6编程软件设计锅炉控制的梯形图,实现了水位三冲量、燃烧过程和蒸汽压力自动控制等功能。工业以太网通讯连接实时性能较好,数据传输率很高。采用IFIX4．0组态软件编写的监控程序具有功能完善、操作简便、可视性好、人机对话功能强等优点。     

安钢500m2烧结机主抽风机故障快速诊断

主要介绍了500m2烧结机系统主抽风机仪表故障快速诊断和假故障防范的办法。     

QUANTUMPLC在邯钢2000m^3高炉过程自动化系统中的应用

本文首先概述了高炉的工艺过程，然后介绍了其过程控制系统的功能需求和各主要控制环节。作者详细描述了采用施耐德QUANTUM系列PLC的高炉过程自动化系统的软、硬件配置及网络拓扑架构、控制系统解决方案及调试应用体会。     

采用QUANTUM系列PLC完成转炉上料系统自动控制

本文简介了转炉上料系统自动化控制的要求和特点，从系统设计和硬件配置上针对QUANTUM系列PLC和Monitor Pro上位监控系统在上料系统上的应用进行了介绍，对程序设计的要求和难点进行了分析，并给出了一个典型工作方式下的程序设计框图。