多功能电力仪表计量芯片

介绍了SA9904B,ATT7026A及CS5463等三相高精度电能计量芯片的原理,比较了芯片的性能指标.SA9904B提供有功、无功电能,但不提供视在功率和相角等参数:ATYT026A提供各分相、合相参数,但不具有中断功能;CS5463不但提供各种计量参数,且具有中断,更有低于12 mW的超低功耗.     

多功能电力仪表计量芯片

介绍了SA9904B,ATr7026A及CS5463等三相高精度电能计量芯片的原理,比较了芯片的性能指标。SA9904B提供有功、无功电能．但不提供视在功率和相角等参数;ATr7026A提供各分相、合相参数,但不具有中断功能;CS5463不但提供各种计量参数．且具有中断．更有低于12mW的超低功耗。     

基于dsPIC与ADE7758的多功能电能测量仪设计

随着电力市场化供应的深入,对电能计量的要求也越来越高,应用电能计量专用芯片ADE7758设计电能测量表,采集数据准确,控制功能灵活、性价比高、可靠性好。本文进行了基于ADE7758及单片机dsPIC的多功能电能测量仪的总体设计,着重设计了ADE7758的接口单元的硬件设计及与dsPIC的通信设计。     

基于ADE7758的风力机电网测量系统设计与校准

本文介绍了ADE7758电能计量芯片在风机电网测量系统中的应用,着重阐述了三相电网测量系统的电路设计、ADE7758系统校准流程,以及ADE7758的三相电压、三相电流、有功功率、无功功率、视在功率和相位等的校准算法。     

ADE7758及其在三相数字电能表中的应用

介绍了一种三相高精度多功能电能计量芯片ADE7758,对其引脚配置和功能做了详细的描述。给出了ADE7758＋MC68HC908LJ12的三相数字电能表电路的总体设计,着重介绍了ADE7758的模拟输入电路和ADE7758与MCU之间接口电路的设计。应用ADE7758构建的数字电能表具有结构简单、精度高、抄表和通信方式多样化等特点。     

斯特林太阳能发电机控制系统电能测量模块设计

介绍了一种基于ADE7758和MCU的电能测量模块设计,主要用于碟式斯特林太阳能发电机控制系统。该设计以ADE7758为计量芯片,以Freescale系列单片机MC9S12XS128MAL为微控制处理器,单片机通过SPI总线接口实现与ADE7758的通讯,并通过CAN总线将数据传送给上位机。该设计符合斯特林太阳能发电机电能参数测量的要求,具有运行稳定可靠、精度高、实时性好和性价比高的特点。     

基于嵌入式电网智能监控器

本文在介绍ADE7758多功能电能计量芯片特性的基础上,提出一个电网监测系统设计方案。该方案以计量芯片ADE7758进行电量传感信号处理及传输,以ARM9处理器S3C2440作为系统硬件平台,设计了电量检测系统软件。对ADE7758的校准进行了研究,并用三相精密测试电源对系统的测量精度进行了实验论证。实验结果表明:该仪表具有较高的测量精度,维护简便、通信实时、可靠性高等优点。可以满足电能测量的精度要求以及电力设备实时监控方面的要求。     

基于ADE7758的配电监控仪

本文以AT89C52作为控制芯片,采用了新型电能计量芯片ADE7758,并且利用一片电能芯片对24户的电能信息进行集中计量与管理。该课题的研究为电能计量和系统管理提供了一种新的技术手段,可以以其较高的性价比进行推广使用。     

用ADE7758设计多功能电能测量表

ADE7758是美国ADI公司开发的一种体积小、动态范围可达到1000∶1的新型电能测量集成电路,它具有数字积分、数字滤波和众多实用电能监测、计量等功能。可做到全电子化,有利于提高性能,降低成本;还可以利用现有的电话线、专线、高频无线电调制解调器、光缆、低压配电线载波等技术手段完成自动抄读表、分时电价、实时电价、多功能计量、预付费等扩充应用功能。使电能计量具有高精度、高可靠性、免维护和双向通信功能,ADE7758正成为新一代高性能全数字电能表的理想芯片。     

基于无线公网通讯的三相电能表设计

本文论述了一款基于GPRS/CDMA无线公网通讯的电能表的设计方案,着重介绍了无线通讯模块的功能及电路、专用电能计量芯片ADE7758的特性及应用电路、NUC120RE3AN微控制器的功能及接口、软件架构。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

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.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

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