温室信息传输技术研究

选用GPRS无线传输技术,针对温室相关信息,通过基于51单片机的无线传输系统的优化设计和测试,建立了温室信息无线传输的软、硬件平台,形成了利用单片机控制GPRS模块进行温室信息无线远程传输的设计依据和方法,为后续研究和技术普及奠定了基础.     

移动护理床机器人无线控制系统的设计

以一种移动护理床机器人作为控制平台,利用无线收发一体数字传输模块nRF905芯片,通过移动护理床机器人身上单片机对机器人各个关节驱动电机的控制,实现了移动护理床机器人与PC 之间数据的无线传输;利用COMS无线摄像机完成对图像的实时观察.实现护理床机器人的无线控制,以及对护理床机器人的实时监控.     

利用姿态传感器多点位控制机器人交互方法

由于已有机器人交互方法的人体姿态识别结果不准确，导致操作完成时间和误差上升。为了降低识别误差、缩短操作完成时间，研究了利用姿态传感器进行多点位控制机器人交互方法。为了准确识别人体部件，利用构建的检测器选取身体躯干候选点。同时兼顾人体部件的位置和方向，获取最优区域，完成人体姿态识别。在上述基础上，设计了机器人交互多点位操作系统，实现了通过姿态及语音远程控制机器人的目的。采用姿态传感器及时反馈机械臂的工作状态和周边的虚拟现实环境，最终实现机器人交互多点位操作控制。实验结果表明，所设计系统能够准确识别人体姿态信息，实现了降低操作完成时间和误差的目的。     

基于Android的一种无线控制方法

提出一种基于Android平台的无线控制方式。该系统采用带WiFi接收模块的单片机作为总的控制网关,手机控制终端以Android系统为应用程序的开发,通过Android手机与控制网关之间的数据命令传输,实现了手机远程控制处于网关内的各类设备。该系统不仅为现有智能控制领域提供了新的控制方法,也为人机信息交互的便携性提供了方法。     

基于MSP430的微型足球机器人无线通信子系统的设计

无线通信子系统是微型足球机器人比赛系统中的至关重要部分,它起到桥梁的作用。论文采用MSP430F149单片机作为无线发送和接收控制芯片,首先上位机将控制命令通过计算机串口传输到单片机中,然后单片机控制无线发射装置将指令以广播的方式发送给装有无线接收芯片的足球机器人,最后机器人上的控制芯片按照接收到的指令决定足球机器人左右轮的转速,从而实现对足球机器人的控制。     

移动机器人遥操作中的力反馈控制

通过力反馈的实现提高对机器人的遥操作可靠性。控制端与机器人之间通过AdHoc架构的PeertoPeer无线网络实现从机器人到主控端的视频传输、传感器信息传输以及主控端到从机器人的控制信息的传输。详述了利用便宜的力反馈手柄控制机器人的力反馈控制策略     

基于无线局域网的机器人控制系统

设计并实现了基于ARM9硬件平台和WINCE5．0操作系统的机器人无线局域网远程控制系统,该系统支持控制命令远程无线传输、现场图像采集、图像实时传输等功能。文中详细介绍了系统的体系结构及工作原理,并给出了各功能的具体实现方法。     

仿蝌蚪与螺旋的泳动机器人系统的设计

提出一种无损伤驱动的仿蝌蚪泳动与螺旋的微型机器人。该机器人巧妙地利用血液作介质,在机器人前进和后退过程中分别采用波状泳动和螺旋式泳动方式动作。在整个运行过程中微型机器人与血管壁之间不发生直接接触,因而对血管壁无损伤。同时,针对内窥镜机器人在封闭管道中工作的特点,提出该机器人系统的无线控制与信息采集、传输子系统的设计方案。整个无线机器人系统设计方案已经被试验证明是可行和有效的。     

煤矿井下巡检机器人自主控制系统的研究

针对煤矿巡检机器人采用有线控制的方式导致其线缆经常被井下设备缠绕的情况,提出了一种新的煤矿井下巡检机器人自主控制系统,利用无线传输方案替代了有线控制。实际应用表明,该无线控制系统提升了巡检机器人的智能化程度,能自动对井下障碍物进行规避,极大提升了井下巡查效率。     

基于ARM的煤矿机器人井下防护探测系统研究

本文利用ZlgBee无线传感器进行煤矿井下瓦斯浓度和温度检测,并组成无线传感网络.进行数据的采集和传输.利用机器人技术完成数据的回收,利用机器人配置的CCD系统观察井下作业情况,并可在事故现场(人不能及的地方)进行矿险评估作业.     

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.     

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.