漏电限流保护安全插座

本文是笔者根据多年的从业需要,设计一款安全插座,通过实时调节插座的用电量,实现插座的短路、过载和漏电等用电安全保护。     

基于电气安全技术的电气工程智能监控系统设计研究

随着科学技术的不断进步与发展,对以电气安全技术为基础的电气工程智能监控系统设计也提出了更多的要求。尤其针对近年来电气安全事故的频频发生,社会经济与人民生命财产安全受到很大威胁,这就要求在电气智能监控系统设计方面不断完善。文章主要对电气安全的基本概述、安全事故分析以及电气工程智能监控系统设计进行探析。     

基于物联网的医疗设备电气安全监控系统分析

要想提高医疗设备电气安全管理的智能化水平,就必须重视合理利用物联网,构建一套新的监控系统.医疗设备电气安全监控系统的构建,需以各项参数的综合分析为基础,其中,要将接地电阻作为重要考虑对象,以无线网以及监控软件为切入点,合理设计电阻监测系统.本文对基于物联网的医疗设备电气安全监控系统进行了简要分析.     

施耐德电气浪涌保护插座带来安全便捷新体验

近日，全球领先的关键电源与制冷服务商施耐德电气旗下的APC首次推出带有可插拔USB充电模块的两款创新型浪涌保护插座P6U-CN和P10U-CN，为家用和商用环境的电气电子设备创造安全洁净的电源环境。     

基于ZigBee的校园安全监控系统设计＊

本文设计了一种基于ZigBee技术的校园监控系统,将ZigBee监控网络提供的目标位置信息与监控摄像机群结合,实时监控校园的安全。监控系统利用ZigBee节点进行定位与信息通信,当图像识别超出安全阈值,全部可拍摄范围内的节点摄像头自动对锁定目标跟踪监控,同时,系统自动发送报警电话及邮件至学校保卫处和范围内的人群,邮件内容含有危险人群及物品的位置信息和现场监控的实时画面。仿真实验表明,监控目标跟踪定位误差在3m之内时,跟踪目标可出现在摄像机监控显示内,且清晰可识别。     

一种基于单片机系统控制的多功能插座

本文介绍了多功能智能插座用途,重点阐述了基于单片机系统控制的硬件、软件设计,多功能插座采用温度监控、反接保护提高了插座的安全性能,具有广阔的市场前景.     

电厂电气监控系统探讨

随着计算机技术和网络技术的不断进步,对电气自动化水平要求越来越高。电气监控系统具有操作方便、可控度高、检修方便等特点,可以实现用电优化、故障迅速切换和恢复、减少值班人员的工作量、提高工作效率的作用,为电厂的安全稳定工作提供了保障,因此,电厂电力监控系统的应用具有重要意义。本文介绍了电厂电气监控系统的工作原理,并分析了电气监控系统在发展中存在的问题以及系统的调试情况。     

具有过载保护的交流固态继电器设计

针对现有的交流固态继电器对过载有较大的敏感性,必须用快速熔断器或RC阻尼电路对其进行过载保护的缺点,提出一种新型交流固态继电器的设计方法。在原有固态继电器电路中嵌入电流监控电路监控电流输出,可设定过载保护电流,在达到预设的电流值时自动关闭输出,并锁定。试验表明,该设计能在过载时有效保护固态继电器,减少元器件的损害,增加了系统的可靠性和可维护性。     

试析嵌入式电气安全智能监控系统的设计

文章基于嵌入式技术对电气安全智能监控系统进行了设计,其中包含了双单片机监控器与集中数据监控器,以现场监控器为基础,集中数据控制器为核心,远程控制软件为扩展,实现了对配电回路及火灾隐患的实时、有效监控,同时还能够实现远程控制。文章对嵌入式电气安全智能监控系统的总体架构与硬件设计、软件设计进行了分析。     

大型火力发电厂电气自动化监控系统设计

为大型火力发电厂配备电气自动化监控系统,可以使管理人员能够实时监测电力系统的运行状态,包括各种设备的电气参数、负荷情况、机组的运行状态等,确保电力系统稳定可靠运行。文章针对站控层、通信层进行功能设计,实现电气自动化监控系统与大型火力发电厂日常运行的深度融合,为保障火电厂运行安全提供技术支持。     

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.     

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.     

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 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.     

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.