实时硬件系统中控制方法的研究

由于实时硬件系统的规模和复杂度不断增大，系统结构的模块化设计已成为硬件系统开发的发展趋势。研究了硬件系统中模块控制的方法和特点。结合MPEG2电视编码器中各功能模块的特点，提出了适合该硬件系统的模块控制方案，说明了控制模块的硬件设计思想和软件实现。实践证明，该方案满足系统实时性和可靠性的设计要求。     

SPI通信在交流伺服中的应用

针对采用人机界面控制交流伺服系统的应用开发实例,设计以MSP430F149为控制核心的人机界面.介绍SPI通信的工作原理及其优点,着重阐述MSP430和DSP之间SPI通信的硬件连接和软件实现方案.该设计方法不仅简化了系统结构,而且分散了DSP的工作任务,增强了系统的可靠性.     

基于S3C2410的传感器网络数据采集系统

针对工业控制中数据采集的需求,设计开发了基于S3C2410的传感器网络数据采集系统,给出了系统的整体设计方案、结构框图。整个系统硬件体积小、运行稳定、维护和升级方便。实现了数据采集、传输、处理、显示及控制功能。     

基于CPLD的可重构技术在嵌入式检测设备中的应用

针对目前国内二次电池检测设备的落后现状,提出了一种基于ARM9嵌入式微处理器和复杂可编程逻辑器件（CPLD）可重构技术的嵌入式智能检测控制系统的硬件设计方法,利用CPLD的内部可编程的特性,解决了嵌入式系统因为控制逻辑变化而在硬件电路上必须作相应变化的问题。实验结果表明,该方法一方面可以提升硬件电路系统的通用性和柔性,另一方面可以提高开发效率、缩短产品开发周期。     

基于硬件抽象层的Bootloader研究与实现

在嵌入式开发中,由于Bootloader和硬件紧密相关,造成了移植Bootloader到一个新的硬件平台要修改大量的代码。针对这个问题,在Bootloader中引入硬件抽象层。硬件抽象层为各种硬件抽象出一个公共接口;Bootloader的硬件抽象层屏蔽了具体的底层硬件,增加了系统的可移植性,减少了移植的工作量。最后针对硬件抽象层实现方法上的不足,给出可行的解决办法。     

单片机系统加密方法的探讨

针对单片机开发的智能仪器和控制领域的高新技术产品的技术保密问题 ,根据多年的开发应用经验 ,提出了采用软、硬件技术进行加密的一系列方法 ,采用软、硬件结合方式实现软件加密有一定的实用推广价值     

基于S3C2440的WinCE Bootloader的分析与设计

针对BootLoader严格依赖于具体的嵌入式硬件系统,并且从头开发一套适合特定硬件系统的BootLoader又相当复杂这一问题,分析设计了基于S3C2440的WinCE操作系统的引导程序的实现方法。结合飞凌公司的嵌入式产品TE2440的硬件特性,对BootLoader启动的两个阶段和配置文件进行了详细的分析和设计,最终实现了系统引导加载程序的构建,为项目后续的开发奠定了良好的基础。     

无人机测试数据采集系统设计

针对无人机的旋转运动和短距离移动等环节的测试,给出一种数据采集系统硬件平台的设计方案,设计了以STM32F103VE,C8051F340为控制核心的主控制器模块、信号采集模块等硬件系统。在此基础上,进一步完成了硬件设备的程序设计,数据采集系统通信协议设计以及LabVIEW测试软件的开发。最后,对数据采集系统进行调试试验,最终验证和实现了系统的数据采集,无线数据传输,上位机数据显示存储等功能。     

基于MACSⅡ的集散控制实验教学系统的开发

介绍了基于MACSⅡ系统并结合过程控制实验装置来开发集散控制实验教学系统的设计方法,阐述了系统的硬件设计和软件组态设计开发思想。该系统既能满足实验教学需要,同时也可为科研工作提供便利。     

基于Matlab和TCP/IP的测试系统开发及应用

对MATLAB中仪器控制工具箱的使用方法和仪器控制的实现方案进行探讨,针对现有基于TCP/IP接口的测试系统软件开发的特点,以一典型实例,提出基于MATLAB平台和TCP/IP接口的测试系统的设计方法和实现技术,叙述了该系统的硬件结构和软件设计以及该系统的功能特点.实例表明,使用仪器控制工具箱,在MATLAB环境下进行TCP/IP测试系统的开发不仅方便可行,而且编程简单,功能强大,开发周期短.     

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.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first     

JOURNAL OF ELECTRONICS(CHINA)

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NEXT GENERATION WIRELESS NETWORKS–ESPECIALLY THE USE OF MILLI-MICROWAVE BANDS

The global bandwidth shortage of wireless communications has motivated the exploration of the naillimeter wave （ram-wave） frequency spectrum for the next generation wireless communications. Recent advances in RF CMOS technology and high speed baseband signal processing technologies have enabled tile extensive research and development of turn-wave wireless communications. The multi gigabit per second data rate of ram-wave system will lead to applications in many important scenarios, such as WPAN, WLAN,back-haul for cellular system. And the frequency bands include 28 GHz, 38 GHz, 45GHz, 60GHz, E-BAND and even beyond 100 GHz. The propagation and the imitation of the RF circuits design in these frequency bands make the directional antennas be inevitable for mm-wave communications.