基于ARM9处理器的车载信息系统的设计

提出了基于ARM9处理器S3C2401X01和Linux操作系统的车载信息系统的设计方案,介绍了车载信息系统的硬件设计结构和软件设计方法,给出了行车记录信号和车载系统行车记录采集系统的模块结构图。     

电梯故障记录仪系统设计

为了保证电梯安全运行,同时减少事故的发生,本文设计一种基于ARM的电梯故障实时记录仪系统。整个系统以ARM微控制器为核心,以无线为信号传输介质,进行电梯信号的采集、传输、判断和存储,将相邻信号进行对比,把故障信号显示在LCD显示屏上,同时存储于FLASH中。系统主要由无线收发模块、门系统信号采集模块、屏控制系统信号采集模块、井道设备系统信号采集模块等构成。初步实验表明,这些模块在ARM芯片的控制下,基本实现对电梯运行状态、故障及事故前各种数据的采集和记录,具有及时显示危险信号,提示电梯故障等功能,能有效保障电梯安全运行。     

电力系统故障实时记录系统通信设计

根据国内电力行业的实际情况及当前电能质量监测仪器中的问题,设计以 DSP 和 ARM 为主要结构的电力系统故障实时记录系统,并制定实时录波通信系统的设计方案,综合采用 RS-232、以太网、GPRS 等传输方式,对通信模块电路进行了详细分析和接口设计.系统通过上位机的丰富功能和多样的传输方式为电力系统电能质量的远程监测和故障数据的实时传输提供了方便,同时能够提高组网的自由度并降低组网成本.     

基于电力监控红外热成像仪软件设计与实现

针对电力故障检测问题,提出了一种基于FPGA＋ARM的嵌入式Wince电力监控红外热成像系统设计方案,详细阐述了基于WindowsCE系统下的红外图像的设置操作、分析、显示的软件系统设计,并给出了相应的程序,最后进行了系统测试,并分析了测试结果,为电力监控故障检测分析提供准确、有效、便捷的红外测试手段。     

基于二维码的会议签到系统设计

针对会议签到快速化、节约化要求,提出了一种基于二维码的签到系统,介绍了系统整体结构以及软硬件设计方案。系统终端由ARM11硬件平台和嵌入式Linux系统构成,使用USB摄像头完成二维码扫描,经由以太网上传至服务器,最后在java平台实现二维图像解码并记录。经过测试表明,系统运行正常,能够顺利完成签到功能。     

基于DSP和ARM双CPU结构的异步电动机故障检测装置

为满足电机故障检测的需要,结合DSP精度高、数字信号处理能力强和ARM资源丰富、性能价格比高等特点,开发了一款基于TMS320F2812和S3C44B0X的双CPU结构的异步电动机故障检测装置.介绍了系统的主要功能并重点分析了系统采用的MCSA(Motor Current Signature Analysis)技术、测量算法、快速傅里叶变换FFT和局部频谱的连续细化分析方法,给出了系统的硬件结构、软件框图和设计方案以及转子断条故障检测的实验结果.     

基于ARM处理器S3C2410的视频播放器的实现

基于ARM体系的RISC设计思想,给出了基于ARM处理器的H．264视频播放器的设计方案,该设计方案的硬件平台采用DMC-S3C2410-P型开发板,软件平台的核心则是嵌入式Linux操作系统。系统的测试结果表明,利用文中方法设计的视频播放器可以对H．264视频文件进行顺利播放。     

基于ARM的CAN总线电缆沟道监测系统的设计

提出了一种基于ARM的CAN总线电力电缆沟道监测系统,给出系统整体结构,详细介绍了系统硬件设计方案,提出了一种基于高性能处理器ARM的CAN节点设计方法.最后详细介绍了基于μC/OS-Ⅱ的CAN通信的软件实现过程.     

基于ARM的CAN总线电缆沟道监测系统的设计

提出了一种基于ARM的CAN总线电力电缆沟道监测系统,给出系统整体结构,详细介绍了系统硬件设计方案,提出了一种基于高性能处理器ARM的CAN节点设计方法。最后详细介绍了基于μC／OS—II的CAN通信的软件实现过程。     

基于ZigBee和ARM的嵌入式智能楼宇无线火警系统设计

zigbee是一种低功耗,低速率的无线网络技术,而ARM处理器则具有功能强大、功耗低、成本低等特点,非常适合构建嵌入式系统。文章介绍了Zigbee技术和ARM嵌入式系统在智能楼宇火灾预警系统的应用方法,结合具体案例提出了一套可行的软硬件设计方案。     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Nanoimprint Lithography -A Next Generation High Volume Lithography Technique

IntroductionNanoimprint Lithography is a well-acknowl-edged low cost, high resolution, large area pattern-ing process. It includes the most promising methods,high-pressure hot embossing lithography (HEL) [2],UV-cured imprinting (UV-NIL) [3] and micro contactprinting (m-CP, MCP) [4]. Curing of the imprintedstructures is either done by subsequent UV-lightexposure in the case of UV-NIL or by cooling downbelow the glass transition temperature of the ther-moplastic material in case of HEL…     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.