PLC和InTouch在净水处理监控系统中的应用研究

针对净水处理厂控制设备多、控制系统复杂、自动化程度要求高等因素,设计了基于PLC和InTouch净水处理过程综合自动化监控系统。主要介绍了通信软件设计、InTouch组态软件与SQL数据库的连接及报表软件设计。该系统实现了净水处理厂水处理过程综合实时自动化监控,取得了良好的监控效果。     

基于OPC的InTouch与S7-300的通信

文章以InTouch组态软件和西门子S7-300系列PLC组成的硫化氢监控系统为工程背景,基于组态软件与PLC两者数据之间的传递以及访问关系,介绍了其通过OPC技术实现组态软件和下位机通信的原理及过程。     

基于InTouch的炼钢厂空压站监控系统设计

针对某炼钢厂空压站设计一套监控系统,该系统由上位监控站、西门子S7-400 PLC及其通信网络构成,使用Wonderware公司的InTouch 10.0软件组态监控画面,实现对空压机机组及其附属冷却系统的实时监控。现场运行结果表明,该系统运行稳定,取得了良好的监控效果。     

OPC技术及组态软件在远程监控和维护中的应用

介绍了一种基于OPC和组态软件技术相结合的远程监控系统，设计了一种符合OPC标准的低成本远程组态监控方法。系统通过OPC技术和网络技术的融合实现了符合标准OPC接口的远程转移工具，同时通过组态软件实现远程组态监控和维护，从而为远程监控开辟了一个新的途径。     

岳城煤矿井下皮带机远程集中控制系统的技术研究

针对岳城煤矿为了实现皮带机的实时监测与自动化集中控制而设计的一套皮带机远程集中控制系统,分析其网络传输、语音扩播系统、视频监控系统、地面监控组态软件的技术。     

InTouch组态软件在伊敏某电厂除灰渣工程中的应用

针对伊敏某电厂除灰渣工程,采用人机界面组态软件InTouch9.0进行监控系统设计。介绍了上位机控制系统的硬件配置,采用面向对象思想开发了完整的工程监控画面,实现了除灰渣工程的实时监控和生产运行情况的实时动态显示,自动报警和在流程图画面上实施对现场设备的控制操作。使用的结果表明,该系统操作简便、可靠,提高了电厂除灰渣的控制效率。     

基于WebAccess的润滑站控制系统通信的研究

通过建立现场设备与工控机组态软件Web Access的通信,实现了对润滑站控制系统加注油品监测、运行控制和数据处理。本文采用VB建立通讯连接程序作为数据交换程序,结合组态软件Web Access建立润滑站自动加注油品的监控与管理系统,有效地解决了组态软件缺乏驱动和监控系统数据传递不及时、数据记录不准确等问题。实验结果表明:该系统易于操作,数据传输准确,运行稳定和便于维护,是润滑站今后发展的趋势。     

120万方／日天然气处理装置的DCS＆ESD系统的设计实现

介绍了APACS集散控制系统（DCS）和QUADLOG紧急停车系统（ESD）以及InTouch监控组态软件的特点和天然气处理工艺流程。设计出符合现场要求的120万方／19天然气处理装置DCS＆ESD系统。论述了该系统的硬件配置和上．下位机的软件组态情况。结果表明，该系统在现场应用中情况良好。     

基于GPRS技术远程水文自动监测终端设计

为了改善现有的水文观测站和水文信息采集点水位监测系统的现状,采用GPRS技术构建水文数据采集系统,不仅能很好地满足水文信息采集的需求,还能实现目前城市重点道路的隧道和涵洞防涝监测功能。该终端利用核心控制器以及GPS、GPRS、LED和LCD显示等技术,实现实时水位显示监控和远程定位及控制功能,达到方便水利部门实时监控水位,远程定位和维护目的。     

基于VPN技术的风电场远程监控系统

介绍一种基于VPN技术的风电场远程监控系统,给出了该监控系统的基本架构和组成部分,展示了基于组态软件开发的Web页面监控软件。该远程监控系统对实现风电场现代化管理具有重要的实际意义。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

Limits of topographic measurement by the scanning tunnelling and atomic force microscopes

Parameters describing the topographic character of a surface (height, surface wavelength, slope and curvature) can be derived from equivalent sinusoidal profiles. The response of a surface-measuring instrument may be modelled in terms of instrument parameters such as stylus radius, and scanning range and resolution. The performance of the instrument may then be mapped as a zone in amplitude-wavelength (AW) space to show the sinusoidal profiles it is capable of measuring. In a first-order analysis the STM and AFM are considered as equivalent to contact-stylus instruments with a notional stylus radius equal to the tip radius plus the gap. Comparisons between different instruments and types of instrument are readily made by mapping in AW space. The error arising from convolution of the sinusoidal profile with that of the finite tip may be quantified and plotted as contours in AW space.