电梯用交流调压调速器的硬件设计

介绍一种电梯用数字式全闭环调压调速器的硬件设计思想及实现。该速器对电梯运行的全过程采用闭环控制，对实际速度与理想速度的差值实时进行ＰＩＤ运算并转化为移相触发脉冲分别触发电机动和制动晶闸管，实现交流调压和能耗制动，是电梯运行跟踪给定的理想曲线。     

基于孤立森林算法的电梯运行异常状态在线检测

为了提高电梯运行稳定性监控能力，设计了一种基于孤立森林模型的电梯运行异常状态在线检测方法。该方法可实时检测电梯加速度参数，振动状态主要依据基线判断，映射关系建立于电梯振动位置和能量间，电梯相关质量参数异常数据测试采用孤立森林算法实现。研究结果表明，振动能量主要集中于低频段，未观察到故障变化特征，也未检测出高频冲击信号，与人工测试获取的信息特点相符。在线测试正常值占比均高于99.6%，判断电梯正常状态及实际运行状态间差异时，主要应用了孤立森林模型。该研究有助于排除电梯运行故障，保障生命安全。     

基于ZigBee及GPRS通信技术的电梯远程监控系统设计

为了有效监控电梯运行情况,提高电梯运行状态监测准确性,设计了基于ZigBee及GPRS通信技术的电梯远程监控系统.运用ZigBee协调器,采集电梯运行状态信息数据,利用微处理器芯片,分析与处理所采集数据,通过GPRS远程监控模型,输送与监控信息数据,完成系统硬件设计.对ZigBee的传感器网络进行数据通信节点的布置,通过设计网络接口模块、网络模块、传输模块以及应用模块,构建GPRS电梯远程监控模型,完成系统软件设计,实现电梯远程监控.经过应用效果分析可知,所提系统的监控功能诊断故障与实际情况一致,能够有效监控电梯运行情况,提高电梯运行状态监测准确性.     

浅谈高层住院楼电梯交通配置的性能指标

随着中国社会经济的发展和广大群众对医疗需求的不断提高,医院的建设进入快速发展阶段。随之,高层住院楼的不断涌现,使得电梯成为必要的交通系统。良好的电梯交通配置是医院垂直交通系统高效运行的重要保障。本文通过指标分析法,以日照市人民医院住院楼为例,通过对电梯交通配置性能指标的研究,提高电梯的运行效率。     

一种节能高效的电梯仿真系统的设计与实现

针对电梯逻辑开发存在现场调试难度大、电梯知识培训成本高等问题,提出一种基于电梯控制板的节能高效的电梯仿真方法。分析了电梯系统的功能和运行规律,设计了监控软件和硬件,建立了电梯仿真实验平台。监控软件模拟电梯操控面板和服务器,可监控电梯状态,硬件根据实际电梯控制板运行条件设计。实验证明,该仿真系统可监控电梯状态,实现电梯操控、电梯故障仿真,仿真真实性较传统仿真平台有明显提高,提高电梯逻辑开发效率,降低培训成本。     

基于LabVIEW的双梯控制仿真系统

研究电梯的并联控制系统,具有重要的现实意义。因此,设计了基于LabVIEW的双梯控制仿真系统,该系统既可以实现双梯独立运行控制也可以实现双梯并联运行控制。通过该仿真系统,测试了全集选电梯的性能。同时,通过对比测试实验,验证了双梯并联调度控制系统相比于双梯独立运行控制系统,在电梯能耗及运行效率上的优越性。     

基于PLC与GPRS的电梯远程监测系统

为了实时监测电梯的运行状态,设计了一套电梯远程监测系统。该系统以西门子PLC为主控模块,经过GPRS模块实时把故障信息传送到One NET物联网平台当中,在实现电梯基本功能的基础上,完成远程数据传输的功能,解决了电梯运行状态无法实时监控的问题。经实际运行测试,该系统具有操作简单、稳定灵活的特点,可以很好地实现远程监测功能。     

基于PLC控制技术的电梯控制系统的设计与实现

为了实现电梯的自动控制,使其运行灵活方便．稳定可靠、抗干扰能力强。本文基于PLC控制技术,介绍了PLC技术控制下的电梯系统组成和工作过程,并阐述了PLC技术控制下电梯系统实现的功能、设计思路、实现的语言和算法。     

电梯安全监控系统的设计

针对目前电梯故障多发问题,采用STM32单片机和LabVIEW软件,构建了电梯安全监控系统,保障电梯安全运行。系统采用STM32单片机作为控制单元,LabVIEW设计的监控平台作为主监控单元。采用TCP/IP协议以及Modbus串口协议实现设备间的数据通信,控制层中的控制器将设备层中的各类传感器采集到的电梯运行时产生的参数进行上传、分析并存储。系统经测试,结果显示：上位机的监控平台能够与STM32单片机能进行数据交换,同时也能够实现对电梯运行状态的监控。     

电梯轿厢意外移动保护装置的技术要求与研究现状分析

电梯轿厢意外移动保护装置是保障电梯安全正常运行的基础,该装置不仅能够实现数据的分析与处理,也能实现电梯运行的风险分析与管控,为电梯故障的处理提供了数据支持。此外,通过应用设备检测装置能够实现电梯的实时监控,进而保障电梯的正常运行,降低故障发生率。本文结合电梯轿厢运行的实际特点与意外移动保护装置运行的技术安全要求,对该装置的技术安全要求以及发展现状进行研究分析,希望能为电梯的安全运行提供合理的建议。     

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.     

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.     

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.     

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.     

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.     

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.