基于Ethernet网关的光纤网络监控系统的设计及应用

本文主要介绍了基于Ethernet网关的光纤网络监控系统的设计及应用。系统硬件结构中包括电子皮带秤仪表、Ethernet通讯网关和上位机PC,其通过Modbus、光纤总线和以太网之间互联交换信息。在软件方面,基于Modbus协议对上位组态软件Ifix5.1和Ethernet通信网关的进行配置和设计,实现了现场仪表信息采集的网络化及其安全监控。     

基于ARM的嵌入式以太网终端设计与实现

文章介绍了基于ARM(Advanced RISC Machine)的智能化仪表的以太网接入方案的设计与实现,对方案的软硬件进行了详细阐述,介绍了智能化仪表通过以太网的远程数据传输和远程监控.在该项目中,嵌入式系统以应用为中心、以计算机技术为基础和软硬件可裁剪的特点得到了充分体现.以太网在工业控制领域中的应用也展示了它的优越性能.嵌入式因特网终端将两者很好地结合在了一起.     

基于PLC的箱式变电站监控系统设计

本文基于可编程控制器(PLC)和以太网实现了箱式变电站的监控系统.监控系统用PLC作为下位机的执行中心,用CP243-1作为以太网通信的核心元件,用组态王建立了上位机监控子系统,实现了对箱式变电站的智能监控,保证了供电系统的正常运行.     

基于霍尼韦尔PLC和力控组态软件的高速公路隧道监控系统设计与实现

为了提高高速公路隧道监控系统的技术水平和管理水平,确保隧道交通的安全、畅通及设备的正常运转,根据高速公路隧道本身的复杂地形特点,按照隧道监控系统的需求分析和控制任务,制定了基于霍尼韦尔PLC和力控组态软件的隧道监控系统软硬件设计方案。本系统采用霍尼韦尔PLC作为下位机,力控组态软件和PC作为上位机,采用工业以太网进行通信,对隧道内的交通状况实时监控,并根据实际情况作出相应的机电设备控制。本系统已在国家高速公路十堰至天水段白河监控中心成功运行。     

变电站远程自动监控系统应用研究

针对传统网络通信技术无法实现稳定、快速且兼容各通信协议构成统一监控体系的现状,文中利用工业以太网技术对变电站远程自动监控系统进行了设计研究,在简单对比分析了当前主要现场通信技术的基础上,概括了工业以太网的技术优势,并给出了完整的基于工业以太网实现的变电站远程自动监控系统构建方案。针对网络组建方案及其相关技术进行了具体分析设计和应用研究,对于进一步提高变电站远程自动化控制水平和工业以太网的远程监控应用水平均具有一定借鉴意义。     

基于光纤网络的皮带秤联网系统的设计与实现

为了加强对煤矿各输送皮带产量的实时控制,实现远程观测与统计,设计了采用以太网光纤收发器为主要数据传输媒介的多台智能型皮带秤称重仪表的联网远程监控系统.采用光纤进行数据的远距离传输,利用PC工控机和可视化编程软件VB的网络内核与智能型称重仪表进行数据的实时传输及处理,同时还设计了界面友好的上位机控制软件.用户现场使用的情况表明,该系统运行稳定,具有一定的实用价值.     

发射机嵌入式远程监控系统的以太网接口设计

针对传统的广播发射机远程监控系统常需用PC机联入Internet而形成接入成本高、体积大等诸多弊端,介绍了一种低成本、小体积的广播发射机嵌入式远程监控系统。详细阐述了由ARM处理器S3C2410A作为主控芯片,RTL8019AS作为以太网接口芯片等实现以太网接口的硬件电路设计。软件设计中,在介绍Linux微内核的定制与裁剪的基础上,给出了Linux下RTL8019AS驱动程序实现的具体步骤,最终实现了嵌入式以太网的数据传输。该设计已经成功应用在广播发射机远程监控系统中,系统性能稳定可靠。     

基于串口服务器的胶囊硫化机的监控系统

针对轮胎胶囊硫化各车间所用PLC生产厂家不同、通信协议具有排他性等问题,本设计采用先进的标准工业以太网对控制系统实现组网。本文主要介绍胶囊硫化机监控系统的硬件组成、上位机监控设计和基于串口服务器的组网方式。运行结果证明,该系统稳定性、可靠性高,易于操作,大大提高了轮胎胶囊硫化效率。     

基于ARM的智能三相电力监控仪表设计

介绍了一种电力监控系统智能三相电力监控仪表的设计方案,叙述了监控仪表的总体结构,给出了信号调理电路、开关量输入/输出电路和通信接口电路的设计方案,并说明了监控仪表的硬件配置图、监控界面和典型的应用电路。监控仪表以32位ARM处理器MB9BF218为控制核心,以ATT7022D为测量元件,实现了对电压、电流、频率、功率因数、有功功率、无功功率等三相电力参数的测量,具有RS485和以太网RJ45两种通信接口,可以方便地与其它设备一起构成电力监控系统。该监控仪表置具有功能完善、高性价比、高可靠性的特点,具有一定的应用价值。     

一种新的汽轮机保护系统监控仪

介绍了基于高性能DSP芯片TMS320F2812的汽轮机保护系统监控仪的实现。传感器检测的汽轮机信号送至DSP芯片进行高效的数字处理及逻辑判决,并将处理结果送到PC机、执行机构或其他仪表,实现对汽轮机的监控。由该仪器组建的保护系统,具有数据处理速度快、精密度高、体积小等优点;特别地,当采集点或控制点过多以致一片DSP任务繁忙时,可通过增强型控制局域网（eCAN）总线对多个仪器组网,进行任务的分担,以实现分布式实时监控。     

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.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

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.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

Critical Stage Rule-Based Real Time Dispatch（RTD）System in Highly-Mixed-Products （HMP） FAB

An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.