微量药品单元动态称重系统的设计与实现

提出了一种微量药品单元动态称重系统的设计方法,可依次完成药品单元的传送和分拨,并统计药品单元的质量情况.建立了药品单元动态称重的动力学模型,模型以能量守恒原理为基础,考虑了滑槽截面参数、传感器参数等因素,对不同质量药品单元的运动过程进行了分析,并利用MATLAB对分析结果进行了仿真.系统对药品单元的传送、分拨控制过程是利用称重传感器对药品单元进行测量,通过与传感器相连的模数转换器连接ARM处理器并发送药品单元质量数据,再由ARM处理器以串口通信的方式将数据发送到控制电机旋转的单片机处理器.同时,ARM处理器基于miniGUI的人机交互界面可以实时显示药品单元质量情况.仿真数据和实验结果表明:当传感器产生信号的阈值0.195 V和称重频率为1.46 s时,药品单元的动态称重过程可以成功实现.微量药品单元称重系统设计方法有效地完成了药品单元称重过程,提高了药品单元动态称重的可靠性、有效性.     

基于ARM的车载称重系统

介绍了基于ARM内核的INTEL PXA255处理器及Window CE系统的车载称重系统设计,该方案克服了传统称重系统中称重设备和车辆分离的缺点,并利用GPS系统对车辆实时监控,从而实现了交通管理部门对车辆超载的网络化智能化管理.着重介绍了该系统的软件和硬件设计方案,对数据采集处理模块设计、汽车电子控制系统的通信模块、文件传输模块进行了实例分析,并详细阐述了设计和开发的具体方法和过程.     

基于ARM9&Linux的AD转换的实现

AD转换是信号处理过程中模拟量和数字量转化的重要渠道,是信号处理过程中必不可少的一个环节.设计主要在基于工业级ARM9263处理器和嵌入式Linux操作系统的基础上,分别介绍了分辨率为12位的串行AD转换器TLC2543的主要特点和工作原理,设计了TLC2543转换器与9263处理器的接口电路,基于接口电路原理图编写了AD转换的驱动程序和相应的测试程序,借助Linux系统下的交叉编译工具分别编译驱动程序和测试程序,生成可在PC机下的超级终端运行的可执行文件,最终实现AD转换.     

基于ARM-Linux的LCD显示模块设计

介绍了基于ARM9(S3C2410)处理器的嵌入式系统中显示模块设计,根据系统结构,给出了framebuffer驱动程序设计,并且分析了驱动程序主要完成的工作和重要数据结构.然后讲述了字符显示原理,并详细介绍了基于Linux的应用软件设计,成功实现了任意字符、汉字在LCD(SHARP LQ035Q7DB02)上的显示.     

集成化便携式车辆行驶称重系统的设计

设计了基于应变式集成化称重传感器的车辆行驶称重系统,其中包括集成化称重板的结构设计、利用有限元分析软件称重仪贴片位置设计、进行集成化称重系统的动态特性分析、以及进行信号采集放大与模数转换的硬件设备等介绍,同时也介绍了测试软件.该称重系统在公路车辆限速行驶状态下,能测出行驶车辆的静态质量、行驶速度以及轴距等车辆静态参数.最终经试验验证得到了本行驶称重系统可用于交通数据采集和辅助实施超载检查.     

基于VxWorks的旋转机械状态监测系统

旋转机械状态监测对实时性和可靠性具有较高的要求,因此基于VxWorks嵌入式实时操作系统以ARM9处理器为核心设计了一种水轮机的状态监测系统.文章介绍了系统的主体硬件结构和软件设计,并对在VxWorks操作系统下基于ARM9处理器的应用程序开发如系统任务划分、网络通信程序设计等进行了重点描述.该系统目前已通过调试仿真,并具有在其他旋转机械中推广应用的潜力.     

一种基于PVDF的车辆动态称重系统设计

针对高速公路车辆超载问题,设计了一种基于PVDF的车辆动态称重系统。首先介绍了动态称重系统的硬件系统,然后比较了三类压电传感器优缺点,简述了PVDF传感器的安装,给出了电荷放大器以及信号采集器等硬件的选择,并对软件系统的设计流程进行了分析。最后设计了动态称重系统试验,对系统进行了验证。     

基于ARM和CC-Link的恒压供水加压站设计

文中提出了一种基于ARM和CC-Link的恒压供水加压站设计方法,进行了硬件的设计、驱动程序以及应用程序的开发.使用ARM9微处理器和CC-Link远程设备站芯片MFP3作为系统的硬件平台,Linux作为操作系统,应用程序使用Qt/Embedded编写.通过实际运行表明,系统远行稳定,可以灵活地组建不同需求的恒压供水系统,存储和显示远程设备站工作运行情况,实现了系统设计的功能要求.     

车辆动态称重技术

随着公路运输业和商业贸易的发展，车辆动态称重技术已成为车辆载荷测量的关键技术和发展方向。文中对车辆动态称重系统的结构和弯板、压电传感器、单传感器及光纤传感器4种常用的动态称重传感器进行了介绍，并对系统产生的轴重信号进行了分析，重点讨论和研究了算术平均、神经网络、系统辨识等运用到车辆动态称重系统中的算法，并且阐述了今后的发展趋势。     

基于ARM的车辆动态信息管理系统的设计

基于嵌入式技术、无线网络通信技术和GPS定位等技术,该文设计了一套以ARM Cortex-A9(Exyons4412)为核心控制器的车辆信息动态管理系统,实现了在特定区域内车辆的定位、信息采集,以及实时、快速地查询多个运动车辆的信息特征等动态功能。系统软硬件的综合调试结果显示,该系统能有效地提高车辆的动态信息管理能力。     

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.