鞍广GSUF-5-Ⅱ型电视发射机风机控制电路的改进

有许多电视发射机末级功放采用电子管结构，而电子管工作时温度很高，必须要有冷却系统（一般有风冷和水冷两种方式），冷却系统工作正常与否直接影响着电子管的工作状态，并对电子管的使用寿命起着相当关键的作用。要想让发射机正常运行，就必须保证其冷却系统正常运行。对于风冷式冷却系统，风机是最关键的设备，其中控制电路和监测手段尤为重要。在多年使用鞍广GSUF-5-Ⅱ型发射机的实践中发现，其风机控制电路（见产品原图）还有许多地方有待于改进和完善。1）风机供电应单独引入本来电路设计是由发射机内部提供风机供电，这样控制电路…     

全固态中波PDM发射机状态监测电路的故障处理

全固态中波PDM发射机以其性价比高、运行维护成本低以及运行稳定等特点成为广播电视台重点选用的发射载体.尽管目前对于全固态中波PDM发射机运行状态的监测与保护措施相对已经比较完善,但对于一些因外部环境引起的故障问题仍然难以完全防范和处置.因此,以PDM发射机的重要监测控制部分——控制器的控制电路状态及监测为研究内容,分析监测电路可能出现的故障类型,并提出相应的故障处理措施,为发射机运行状态的监测控制提供相应的技术参考.     

游梁式抽油机生产故障自动监测系统设计

为了实时准确监测游梁式抽油机的生产运行状态,及时对停井及停电等故障进行排查和处理,研发了一套适用于油田生产现场的油井生产故障自动监测系统。系统采用接近开关检测曲柄销的运动状态,采用ACDC模块检测抽油机的供电状态,应用GSM网络将报警信息远传至上位机系统,通过页面开发和网络发布,实现了油井生产运行状态的在线实时监测。现场应用表面,系统停电报警响应时间小于20 s,停井报警响应时间小于60 s,且无误报漏报情况发生,满足现场实时性与准确性要求。     

基于BLE-LoRa的布撒式自组网火灾报警系统的设计思考

针对不便建立有线网络和使用移动无线网络进行数据通信的场景，介绍了一种基于BLE-LoRa的火灾报警系统设计思路，即通过将多种传感器分散布设于目标场景，再以两种无线电技术接力的方式将目标场景物理量参数传送至控制终端，用于状态监测和报警，并在火灾发生时多个控制终端联动响应，共享报警信息。     

基于B/S数控机床远程监测系统设计及实现

为了提高数控机床的智能化水平,实时、快速、及时地检测机床运行状态下可能发生的故障,保证机床的正常运转,提出了基于B/S模式的数控机床远程监测系统的设计方案,系统利用多传感器、嵌入式ARM微处理器组成的数据采集模块对机床运行状态下主要部件的信号进行采集、处理、传输,存储到PC机上的数据库中,并通过Web服务器读取,将信号以实时数据及图形曲线的形式显示在浏览器上,同时通过预设报警阈值,来对异常数据进行报警,为数控机床的智能化、实时监测运行状态下可能发生的故障提供了可靠的解决方案。     

基于FactoryTalk View Studio堆垛机在线报警监测系统的设计

本文主要介绍以罗克韦尔1756系列PLC控制堆垛机运行为基础,采用基于FactoryTalk View Studio工控软件而设计的在线报警监测系统,对堆垛机运行进行实时监控,包括对光电开关,接近开关,位置开关,极限开关,编码器、变频器等检测元件实时数据读取,对设备报警状态的监测,研究堆垛机运行情况。该监控程序既可以应用在触摸屏,也可以用在PC机上,通过实时数据传输监测,方便对设备故障及时处理,提高设备运行效率,同样也验证监测系统的有效性。     

电机驱动、监控报警控制电路的研制

本文详细地说明了电机驱动、监控报警控制电路的设计及研制过程，并对研制过程中所遇剑的技术难点和关键技术进行了重点阐述。产品的性能指标与国外同类型控制电路相当，具有很大的实用性与通用性。     

老人跌倒监测定位装置的研究

当老人发生跌倒或者遭遇其他意外危险时,如果未在第一时间得到救治,很可能会导致老人瘫痪或生命安全,针对这一情况,提出了采用三轴加速度计等对老人状态进行监测和报警的装置。老人跌倒监测定位装置实时对老人姿态变化进行监测,当老人发生跌倒或者遭遇其他意外危险时,监测装置报警并通过内置的GSM/3G通信模块和全球定位模块(GPS),将所在的位置信息以短信形式,发送给预设的家人或社区服务站手机终端,还可通过移动通信的语音通信功能,进行状态确认和语音救助指导。对坐、站、步行等状态下及俯卧、左右侧卧等姿态下的数据进行了采集处理,结果表明装置能正确监控并报警,同时可将定位信息发送到预设的手机上。     

omRon C40H可编程序在全固态调频发射机中的运用

我台原用的是TF3TA型10kW调制式电子管调频发射机，此发射机的逻辑控制部分基本是由晶体管和集成电路组成，由于晶体管的热稳定性差，逻辑控制电路小盒容易出故障，导致发射机的故障率增加，而且机器设备必须采用人工开关机，这样有时还会造成误开机。为了避免上述情况的发生，我们设计了新的控制电路，将原有的晶体管逻辑控制电路拆出，改为PC机控制电路。PC机控制电路采用omRonC40H可编程序控制器，用它来控制发射机的正常运行，改进后的发射机能自动开关机、自动过荷报警、自动倒机，降低了发射机的故障率。     

阀门内漏实时在线管理系统

对影响火电机组热力系统安全性和经济性的主要阀门泄漏状态在线分析,实时监测汽水系统主要阀门泄漏状态,当阀门泄漏时系统自动报警,在实时报警查询页面显示全厂所有泄漏阀门信息,并按泄漏严重程度、出现时间早晚及泄漏历时排序,为点检员制定合理的维修计划提供依据。     

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.     

Nanoimprint Lithography -A Next Generation High Volume Lithography Technique

IntroductionNanoimprint Lithography is a well-acknowl-edged low cost, high resolution, large area pattern-ing process. It includes the most promising methods,high-pressure hot embossing lithography (HEL) [2],UV-cured imprinting (UV-NIL) [3] and micro contactprinting (m-CP, MCP) [4]. Curing of the imprintedstructures is either done by subsequent UV-lightexposure in the case of UV-NIL or by cooling downbelow the glass transition temperature of the ther-moplastic material in case of HEL…     

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.     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

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.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

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.     

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.