基于PLC控制的自动晾衣架设计

针对现代生活中实际晾晒时会遇见的日晒雨淋,以光照、湿度、温度为判别依据设计了一种全自动晾衣架。详细阐述了基于Pro/E仿真和有限元分析的自动晾衣架的结构设计,重点介绍了基于PLC技术的自动晾衣架的控制系统设计,分析了雨滴传感器,光敏传感器、温度传感器的应用原理。晾衣架的设计实现了装置的自动化与智能化,实用性强,适合未来智能家居的时代发展需求,具有一定的应用前景和参考价值。     

自动升降旋转式智能衣架设计

针对目前大多数居民由于居住空间不足和工作忙碌等方面的原因，无法花费太多时间和精力来解决晾晒与收衣服的问题，设计了一种可根据外界气候条件自动收晾衣服的智能晾衣架。该晾衣架总体结构共有3个自由度，可以分别实现衣架的回转、升降及伸缩运动，搭配使用STM32单片机来采集光照、雨滴和风速等外部天气变化信号，实现晾衣架的自动化控制——当天晴时，将衣架转出，晾晒衣物；当下雨或者没有阳光时，转回室内，防止衣物被雨打湿。同时，该晾衣架机构紧凑,操作方便——按键电路还可以手动或语音控制衣架的升降以便晾晒衣物。     

自动伸缩式防雨晾衣架的研究

针对现有市场上晾衣架缺少自动防雨装置的不足，提出一种自动伸缩式防雨晾衣架：介绍该晾衣架的结构特点和工作原理，运用ANSYS软件对晾衣架主要构件进行强度分析，对晾衣架整体进行抗风能力分析，样机试验结果表明该晾衣架方案是可行的。     

基于单片机和传感器的智能晾衣架系统设计

追求方便、快捷的生活方式已成为现代人的目标,设计一种基于单片机、传感器和电动机的智能晾衣架,实现对晾晒衣物的智能控制,将进一步方便人们的生活.该设计就是在原有晾衣架的基础上添加机电控制系统,通过传感器的检测和单片机的综合处理来实现对晾衣架的智能控制.     

一种智能晾晒避雨装置

该装置可以根据户外实时温度、湿度以及光照强度调节电机的转动方向,从而实现在户内或户外晒衣服时的自动控制功能。当用户打开晾衣架电源时,晾衣架会自动识别该环境是否符合把衣服伸出阳台晾晒。当天气晴朗、湿度适宜且无雨水时,晾衣架会自动伸出阳台;当天气条件改变时(缺少上述条件之一),晾衣架会自动缩回阳台,避免衣物受到损坏。该装置解决了用户不便收取衣物时衣服被雨水、露水等打湿的问题。     

智能晾衣架创新设计与控制系统研究

分析了传统的晾衣架在使用中存在的诸多问题,提出了采用STC12C5A60S2单片机做控制器,直流电机驱动螺杆工作的智能晾衣架的机构设计和控制方法。DHT11和光敏电阻传感器模块感知温湿度和光照值,通过红外遥控可以切换智能晾衣架工作在手动和自动两种工作模式,同时能够设定比较值。该智能晾衣架在实验室使用过程中效果良好,这将给人们的日常生活带来了极大方便,满足了人们的对晾衣架智能化的特殊需求。     

飞机结构件自动化装夹系统研究

飞机结构件作为典型飞机产品的代表,实现飞机结构件生产的智能化对我国航空工业的发展具有重大战略意义。而自动化装夹技术是智能化生产的基础,是实现飞机结构件智能化生产的必由之路。本文系统地归纳了飞机结构件的分类和装夹方式,详细地说明了一种自动化装夹系统的建立方法,并提出自动化装夹技术的发展建议。     

多品种柔性智能化重载EMS生产线系统设计及应用

根据新能源中高端商务车车型品种过多、整车质量过重、承载结构复杂、底部构件繁多等特性,文中设计一种多品种柔性智能化重载EMS生产线系统,设计中主要研究解决高端商务客车多品种、大吨位重载车型生产的连续性、柔性、智能化混线批量生产,结合前悬、后桥、电池包等零部件进行差异性分析及系统化设计,研发出重载型多品车身吊具、重载双胞胎式接车机构、吊具定位支撑调节锁紧装置、接车机构专用抱胎夹持器等配套关键设备,实现生产线智能化进行自动化输送、装配和高精度产品自动转接。在设计研发过程中,采用了3D动漫仿真分析各分线装配与主线装配配合的工艺节拍和装配瓶颈性问题,实现生产节拍一直协调,采用SolidWorks受力计算分析软件进行设备结构支撑受力分析和使用寿命分析从而解决设备结构支撑强度问题和处理材料应力的方法,保证使用寿命及应用安全。采用PLC连锁控制编程软件组成智能化控制系统实现设备自身动作和连线装配自动化控制。该设计已被实施使用,使用效果良好,在同类产品中具有独到创新性。更好地实现了具备柔性、智能的车辆底部（底装线）工艺装配技术。     

模块化辊道贮存系统设计与实现

针对大质量细长产品的长期贮存问题,设计了一套模块化辊道贮存系统,该系统由产品贮存辊道底座组件、动力移载辊道、传动系统、限位机构及自动移载动力对接机构等组成。提高了细长产品的贮存密度,且能实现产品的自动水平移载,提高了移载效率和安全性。该方式产品贮存过程中无需起重机进行吊转操作,压缩了人工操作空间,产品贮存间距由原来米级缩至厘米级,产品贮存数量提升2倍以上。该方式采用自动化设备,提高了贮存的自动化和智能化程度。     

基于STC89C52单片机智能防雨伸缩晾衣架设计

设计了基于STC89C52单片机的智能晾衣架系统,实现无人在家也能根据大气环境自动晾衣功能。通过定时芯片DS1302设定定时区间来识别昼夜,不受其他光源的影响。结合DHT11湿度传感器及LCD1602进行湿度的检测及数值的显示,通过单片机综合处理这些信息控制步进电机的正反转,达到智能晾衣的效果。该系统设定2种工作方式,定时区间和预设湿度值均可调,并且采用太阳能电池板供电,是一个具有灵活性、通用性、稳定性的节能型智能晾衣架,具有一定的推广价值。     

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...     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

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.     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

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....     

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.