彩砖砌块自动成型机的控制系统设计

砌块成型机是近年来发展较快的建材设备,无论是在取材还是控制系统上都比旧式设备有了明显的提高.本文针对一种彩砖砌块自动成型设备,对其控制系统进行了研究与设计,并通过LG MASTER-K系列PLC实现了该设备的控制要求.     

混凝土生产线计算机监控系统内部通讯的实现

本文系统地介绍了对加气混凝土砌块生产线进行计算机监控的系统组成和结构,着重描述了系统的上位监控部分和自动配料仪表之间的通讯和参数传递的实现,对上位机与自动配料控制器的通讯作了详尽的说明。本文除了对以上部分的详细研究之外,也涉及到了下位PLC的相关内容和电气部分的设计。本文介绍的系统的各项功能做到了砌块的安全生产和生产线的实时监控,基本实现了砌块生产线的生产自动化和工厂的管理控制集中化。     

分层布料式全自动砌块生产线成套设备

该设备是在引进消化吸收意大利砌块生产设备制造技术的基础上,结合我国国情创新研制的。生产线由22台单机组成,主要包括电气控制柜及料仓、称量装置、搅拌机、砌块成形机、升降板机、窑车、码垛机、托板输送机和液压站等设备,可自动完成从原料的投配、混凝土的搅拌、砌块的成形、砌块在养护过程中进出窑     

分层布料式全自动砌块生产线成套设备

该设备是在引进消化吸收意大利砌块生产设备制造技术的基础上,结合我国国情创新研制的。生产线由22台单机组成,主要包括电气控制柜及料仓、称量装置、搅拌机、砌块成形机、升降板机、窑车、码垛机、托板输送机和液压站等设备,可自动完成从原料的投配、混凝土的搅拌、砌块的成形、砌块在养护过程中进出窑的     

建筑砌块成型机

建筑砌块成型机江苏海门机床厂最近试制成一种专以工业垃圾为主要原料，可生产出１５０多样建筑标准砌块的新型自动砌块成型机。经国家建设部、建材局专家鉴定，具有世界同类产品先进技术水平。现已批量生产并投入市场，用它进行生产不损农田、不用窑、不烧燃料，既可以为...     

砌块生产线自动控制系统的开发

针对运用于砌块生产线的传统继电器式控制系统的缺点，介绍一种由微机与PLC组成的自动控制系统，及该控制系统的开发过程。     

基于SolidWorks的石膏空心砌块成型机的三维设计

石膏空心砌块成型机是一种生产石膏空心砌块的专用机械设备.为了提高石膏空心砌块成型机的设计效率,缩短产品的设计开发周期,满足中小投资者和产品更新换代的需要,使企业能够快速响应市场需求.根据石膏砌块成型机的结构特点及工作原理,以SolidWorks三维设计软件为平台,利用参数化设计方法和运动仿真功能建立了石膏砌块成型机的三...     

砌块成型机振动模态与谐响应分析及设计改进

对某砌块成型机进行了有限元建模,介绍了建模方法,通过砌块成型机的模态试验结果,对其进行了修正.分析了各阶模态振型.修正结果表明,砌块成型机模型能够反映其真实的动态特性,同时对振动台进行了谐响应分析,得出了砌块成型机振动台的理论振幅值,并对砌块质量进行了评价.最后根据现场测试对砌块成型机进行了结构改进.     

振动测试方法及测试系统的研究

在建立检测砌块成型机振动动力学模型和运动方程的基础上,提出了砌块成型机振动的检测方法。采用虚拟仪器技术开发了砌块成型机振动测试系统。该测试系统采用PO-DAQ方案,在振动台上安置传感器,配以PC机平台和虚拟仪器软件,构建了可以测得振动加速度、振动位移、上模压力及相应的振动波形的性能测试系统,为砌块成型机的综合评价及故障诊断提供了依据。通过振动实测,证明测试系统准确、可靠。     

ZB-4混凝土草芯砌块成型机的设计与开发

混凝土草芯砌块是符合新形势要求的、实用环保节能型墙体材料。ZB-4混凝土草芯砌块成型机采用液压驱动,砌块通过模压成型,免烧制,生产效率高。     

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.     

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....     

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。     

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.     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.