某型导弹单元测试模拟训练系统设计

为了给某型导弹单元测试设备配套的模拟训练设备,采用硬件结合软件的方法实现模拟训练系统的设计。硬件结合软件的方法是由单片机检测外部开关、按钮等元件状态,再由软件来判断结果,在数码管和指示灯上进行显示。详细介绍波段开关读取、语音控制等关键的硬件技术、软件流程、流程数据分离技术和菜单技术等关键的软件技术在系统中的应用。     

一种DeviceNet从站软件一致性测试方法与实现

DeviceNet现场总线以其独有的优势在自动化领域得到了广泛应用,随着设备厂商对DeviceNet设备的开发日益增多,DeviceNet设备的一致性测试愈发受到重视.根据DeviceNet协议与相关规范,分析了DeviceNet从站设备的软件一致性测试项目,设计了测试系统的硬件与软件结构,构建了测试系统的时间模型,并...     

几种诊断测试系统的简单方法

测试系统的状态是否正常关系到测试器件的准确性和测试精度。有经验的硬件工程师和软件工程师经常会发现有时测试系统虽然自诊断通过，但测试器件时却参数测试不准确、功能测试失效等。这往往叫人无从下手。本文介绍几种通过软件编程、利用简单仪表来有效的诊断测试系统的方法。     

OLED光电性能综合测试系统的设计

针对目前有机发光二极管(OLED)器件光电性能测量普遍采用分立设备手动测量的现状,提出了一种以微控制器为核心的OLED光电性能综合测试系统方案,介绍了系统各部分的软硬件设计方法。系统可以在一个平台上同时对发光器件的各种光电特性进行测量,实现了光电特性实验的计算机化,具有综合性强、测量方便、精确度高等特点。     

基于虚拟仪器的程控信号源远程控制

为了实现对GPIB程控信号源远程控制的目的,组建一个虚拟测试系统。该测试系统,采用虚拟仪器技术,以LabWindows/CVI作为软件开发平台,以GPIB标准总线仪器与计算机作为硬件平台,使用装有GPIB接口卡计算机,将计算机与程控信号源通过总线连接起来,组成程控信号源为主的虚拟仪器模块,仪器模块的硬件功能通过软件开发实现;采用VISA方式编程,直接用VISA语句编写程控仪器指令,脱离仪器驱动程序,对GPIB总线设备可以相互兼容使用。该测试系统实现了对程控信号源的数据远程收发和功能设置。     

Power metering using wireless sensory network

This paper presents the design and implementation of a hardware platform for wireless sensory network applications. This hardware platform is designed to address the constraints of size, cost and energy consumption imposed on wireless sensor network nodes. It also presents the development of a power metering application based on the manufactured hardware devices. The application will measure and log the power consumption of different household or office appliances and transmit gathered information wirelessly to a base station. Moreover, the application has also been used for testing and exploring various capabilities and functionalities of the hardware platform.     

基于SoPC和NIOSⅡ的SD卡文件系统的设计

传统嵌入式设备对SD卡的读取一般基于硬件层面,这么做省资源但是换来的是时序麻烦,移植困难,读取文件不灵活。针对资源较为丰富的嵌入式方案,利用SoPC技术和灵活的NIOSⅡ软核,提出了一种在SD卡上建立了FAT32文件系统的方法,实现了对文件的基本操作如新建、读取、删除等,并在SD卡根目录里放置测试文档。对NIOSⅡ的代码实现进行测试,结果表明NIOSⅡ顺利地读出了文档里的内容,以及根目录其他文件夹。测试实验在Terasic的DE2系列开发板上通过验证。该方案方便了开发者对不同嵌入式设备进行移植,使其更加专注于顶层操作。     

超声探伤系统硬件报警技术研究

闸门报警技术是实现自动化探伤系统的一项关键技术。在分析传统探伤设备闸门报警技术优缺点的基础上,提出了一种基于FPGA实现的硬件报警技术,并重点介绍了硬件报警技术的工作原理及实现流程。系统测试表明,闸门形状设置灵活多样化,很好地匹配波形衰减情况,而且满足了在高重复频率下系统实时性报警要求。     

微机接口芯片地址编码设计的系统化方法

本文给出了微机存储器扩展和I／O接口装置中关于也址编码的一种系统化设计方法。该方法的核心是建立一个各I／O器件和存储器件的地址表，并根据地址空间的分配来设定与每一个器件相关的每一根地址线的逻辑电平。地址表使硬件设计人员清楚明了各硬件的地址安排，给硬件系统的设计带来很大方便。本文还给出了数据线、控制信号线以及地址编码的设计规则，文中所述方法对于分析已设计好的系统也是适用的。     

基于PCI的多通道ARINC429总线接口卡设计

航空总线通讯设备的检测是航空电子系统测试和维护的重要组成部分.现有的ARINC429总线通讯设备通道数较少,无法满足现实使用中多设备多通道同时检测的需求.为有效解决这一问题,通过对ARINCA29数据总线及相关型号芯片进行充分分析.提出了一种基于自主设计的多通道总线协议IP核的多通道ARINC429总线接口卡的硬件组成原理及实现方法.接口卡采用PLX公司的专用接口控制芯片PCI9054实现PCI接口,使用双端口RAM解决多通道同时工作时数据读写的实时性、可靠性问题.系统仿真分析和实装试验的结果表明,该总线接口卡能够很好地满足快速数据处理和稳定高效的数据传输的要求.在实际使用中.实现了16收16发的功能,具有很高的实际应用价值.     

A Scan-Testable 6000 Gate Array

In this paper hardware and software aspects of the AGA6000 are described. The AGA6000 is the first member of a new family of Philips gate arrays. It is a high-speed double-layer metal gate array in which special flip-flop rows are implemented. These flip-flop rows automatically insert a scan path in a gate array design. A scan-path test vector generation program guarantees a complete hardware testing of the devices with a 100-percent fault coverage for single stuck-at-one/stuck-at-zero faults. This gate array family was announced in [1].     

微波着陆系统视频信号研究与工程实现

本文对微波着陆系统(MLS)视频信号的特征进行了分析,结合工程应用实际,运用新技术新器件,采用软硬件相结合的方法对视频信号的产生进行了设计实现。经测试,视频信号的各项指标均满足国际通用标准要求。     

Analog-to-digital converters and their applications in radioreceivers

Rapid advances in hardware development of analog-to-digital converters (ADCs) have paved the way for development of radio receivers using digitization at the IF, and in some cases, at the RF. The constraints placed on these receivers due to hardware limitations of these devices are discussed and some examples of high-speed, state-of-the-art ADCs are given     

LIS: Localization based on an intelligent distributed fuzzy system applied to a WSN

The localization of the sensor nodes is a fundamental problem in wireless sensor networks. There are a lot of different kinds of solutions in the literature. Some of them use external devices like GPS, while others use special hardware or implicit parameters in wireless communications.In applications like wildlife localization in a natural environment, where the power available and the weight are big restrictions, the use of hungry energy devices like GPS or hardware that add extra weight like mobile directional antenna is not a good solution.Due to these reasons it would be better to use the localization’s implicit characteristics in communications, such as connectivity, number of hops or RSSI. The measurement related to these parameters are currently integrated in most radio devices. These measurement techniques are based on the beacons’ transmissions between the devices.In the current study, a novel tracking distributed method, called LIS, for localization of the sensor nodes using moving devices in a network of static nodes, which have no additional hardware requirements is proposed.The position is obtained with the combination of two algorithms; one based on a local node using a fuzzy system to obtain a partial solution and the other based on a centralized method which merges all the partial solutions. The centralized algorithm is based on the calculation of the centroid of the partial solutions.Advantages of using fuzzy system versus the classical Centroid Localization (CL) algorithm without fuzzy preprocessing are compared with an ad hoc simulator made for testing localization algorithms.With this simulator, it is demonstrated that the proposed method obtains less localization errors and better accuracy than the centroid algorithm.     

DS80C411网络微控制器的应用

提出了一种基于DS80C411的串口至以太网接口转换的设计方案,介绍了多个串口设备的入网应用。给出了系统硬件结构,描述了串口与以太网协议的相互转换设计方法,分析了软件设计。该设计可以将RS232/422/485通讯接口的设备和以太网服务器进行数据流传输,通过以太网服务器实现了对串口设备远程管理,实现了串口设备之间的网络互联。     

数字电视无线规划/覆盖测试系统

通过对现有研究结果的考察,提出了一种设计数字电视无线规划/覆盖测试系统的软硬件方案,并给出了其在实际测试中的结果.     

基于CS6220的VoIP终端的研究

以往的IP电话设备主要采用H．323协议实现，但是H．323协议实现过程的复杂，给实际使用造成很多的问题。提出一种基于CS6220的VoIP终端的实现方法，VoIP协议采用实现简单的SIP协议，同时也能够确保电话业务的服务质量，电话业务接口的技术性能指标满足相关规范要求；重点阐述了基于CS6220的VoIP终端的软硬件设计方法；电话接口的性能测试结果表明，所提出的方案在因特网运行良好。     

基于PLC的电路板尺寸检测机控制系统设计

本文首先介绍了电路板尺寸检测机的组成部分,在此基础上设计了检测机的控制系统,包括硬件和软件设计。对控制系统的硬件进行了选型,设计了电气原理图;分析了检测机的动作流程,给出了程序流程图。通过实验室模拟调试和现场调试,达到了预期的检测要求。     

GPIB接口板AX5488在Labview中的应用

介绍了GPIB接口板AX5488在Labview编程环境中，调用其动态连接库实现对带有GPIB接口的智能仪器进行程序控制的方法。该方法在研制的R-T曲线虚拟仪器测试系统得到了很好的应用。使用该方法还可以使类似的硬件设备在Labview中都得到应用。     

Digitization and display for interactive image analysis

In the automatic inspection of components, picture processing (interactive image analysis) is presenting itself as a worthy contender. To investigate applications a prototyping system has been developed at the University of Southampton. The most useful input devices are a television camera and a videotape recorder. The acquisition of video for processing requires specialized hardware. The development of such hardware, its flexibility and its possible uses are discussed. The prototyping system is discussed and some examples of its use are given.