基于PLC的智能投币机辨伪系统设计（英文）

针对近些年来公交车投币箱出现大量假币、残币等不良现象,且智能投币机的自动化程度需进一步提高,本文综合应用多种传感器对投入的硬币和纸币信号进行采集,首次采用PLC来作为整个系统辨伪的核心,设计出了能同时辨伪1元硬币和纸币的PLC硬件系统和软件流程。通过多组实验对系统进行了测试,结果验证了此系统辨伪程度高,运行稳定,灵活性好,准确率达到了97%,可以应用到无人售票公交车上。     

基于单片机的公交车智能投币监测系统的研制

针对当前公交车投币系统存在的问题,设计了基于STC89C52RC单片机的投币自动监测系统.系统应用了G-13硬币接收器,设计了假币的检测及报警功能,完成了投入硬币的自动累计了及长期累积、存储功能,并对纸币的投入装置进行了设计.系统的软件设计采用巧妙的防干扰措施.经试用,该系统应用效果理想.     

多功能公交车投币箱的设计

通过对现有公交车投币箱的研究,采用新型机械结构设计了一种通用公交车投币箱系统,在入口处能够实现纸币和硬币的分离,同时可以实现假币的识别、各种面值的硬币之间的分离,并采用红外对管计数电路实现硬币的自动计数。     

公交车钱币清分研究与应用

随着绿色出行的理念深入人心,公共汽车已成为人们日常出行的首选交通工具。本文考虑实际情况,设计了一种应用于公交车上的新型钱币清分机,可实现快捷高效的投放纸币、硬币。利用硬币自身重力及直径大小不同将纸币、硬币进行分类,利用槽轮机构进行找零。     

基于PLC的硬币包卷机控制系统设计

硬币包卷机是集硬币检伪、计数和包卷功能为一体的光机电一体化设备。设备的执行机构比较多,各机构的动作响应快,定位精度高,且具有很高的柔性,因此对控制系统的要求比较高。PLC作为一种集成度高、功能性强的工业自动化控制器,已经在包装机械领域得到广泛地应用,能够满足全自动硬币包卷机的动作和功能要求。将西门子S7-300PLC应用于硬币包卷机控制系统的设计,论述了硬币包卷机的工作原理,再分别从系统软硬件两部分出发,应用编程软件STEP7和仿真软件S7-PLCSIM进行了控制系统的硬件组态和程序的仿真调试。应用PLC实现硬币包卷机控制系统的开发,开发周期短、可靠性高,能够满足硬币包卷机机构和功能的要求,具有较好的推广价值。     

城市轨道交通自动售检票系统物联网技术应用研究

随着技术的不断发展和运营需求的增加,城市轨道交通实现物联网已不是远景而是现实。现以实践经历为范例,根据工作经验和心得体会,介绍自动售检票系统终端设备中储票箱、废票箱、储钞箱、硬币补充箱、硬币找零箱、纸币补充箱和纸币找零箱等物联网技术应用情况,对后续新线路的建设和研究具有重要的指导意义和参考价值。     

多功能钱币分类整理装置研究与开发

在研究目前国内市场需求及硬币分类装置优缺点的基础上,针对现有钱币整理装置功能单一,分类效率低、分类质量差的问题进行深入研究,文中提出纸币硬币分离方法和硬币分类方法,基于这两种方法设计多功能钱币分类整理装置.文中设计风力分离机构和筛式分离机构相结合,实现纸币与硬币高效分离;设计基于硬币厚度的离心式单个硬币分离机构,实现混合硬币堆中单个硬币的高速分离;设计基于硬币形状及直径综合参数的分类机构,实现高速准确的硬币分类;设计双筒硬币暂存切换机构,实现分类后的硬币在单筒内收集、整理、定量暂存及传递的功能;设计硬币包装机构,利用成品装币桶进行硬币收集,利用压盖机构实现硬币包装.对文中设计的多功能钱币分类整理装置进行试验样机的制作并进行测试,经试验测试得出,文中提出的多功能硬币分类整理装置解决了目前硬币整理装置功能单一,分类效率低、分类质量差的问题,为提高钱币整理装置工作效率和精准度提供了一种有效的解决方案.     

机械化自动纸币整理系统的研制

为了解决当下小额纸币整理的需求,在研究机械结构传动原理的基础上,提出了机械化自动纸币整理系统。通过设计纸币间歇递送装置、纸币角度摆正装置、纸币展开装置和纸币展开保持收纳装置,从而实现将纸币从折叠状态展开成平整状态这一过程。基于慧鱼模型,搭建机械化自动纸币整理系统。该系统结构稳固,可靠性高,模块化设计,能实现折叠纸币的展开、平整和整理工作,还可以实现与其它纸币识别和硬币分类识别装置对接。     

基于慧鱼模型的智能公交投币机设计

基于慧鱼模型设计了一款适合公交的智能投币机,解决了现有公交投币机不能对纸币进行展开、整理以及对钱币不能进行鉴定真伪的问题,具有纸币展开自动化、硬币分类高效化、鉴别真伪智能化、投币应急一体化等优势,具有广阔的应用前景。     

基于PLC控制的全自动硬币包装线系统设计与实现

可编程控制器PLC是大规模工业自控化的产物,在工业化生产中已成功的应用了30多年.市场上各品牌的硬币清分机、包装机、塑封机很多.但把这些机器设备集成到一起,设计出一条"集中管理、分散控制"的全自动硬币包装流水线,服务于我国现代化的银行系统还是一个市场空白,市场前景非常广阔.     

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.