基于嵌入式技术的车位错时管理系统

针对停车场车位利用率低下、车位管理及车位分配不灵活等问题,提出了一种基于嵌入式技术的停车场车位管理系统的实现方案。该方案基于嵌入式平台并结合GPRS短信收发及Zig Bee的无线物联网等技术实现了停车场车位信息采集、传输、调度及管理自动化功能。实验表明,设计系统可实现车辆出入车库不停车识别、车位停车信息全自动实时采集、错时调配闲置车位等功能,满足车位管理智能化的需求。     

大型停车场车位引导及寻车系统的研究

将ZigBee技术、红外监测车位技术、信息显示技术及微控制技术与停车场管理系统配合使用,实现对车位的实时监测及车位状态信息的显示。能够方便、迅速地引导停车和反向寻车,将防盗、消防、报警相结合,实现对车辆来源复杂的停车场高效管理。     

基于单片机的立体式停车场管理系统

立体式停车位管理系统首先实现对车的进出检测,对车位数进行实时监控,根据车辆进出数对剩下车位进行显示,同时检测到有车进入时,通过驱动电机开门放车进入,进入一段时间车停好后,电机对车位进行升降控制,同时出车门时可以通过按键实现对车位和车库门的控制;根据模块的特性立体式停车位管理系统的硬件电路和软件算法设计,最后对立体式停车位管理系统的仿真测试,实现对车辆进出的检测、车位数统计以及车门和车位管理等功能。     

基于5G移动智能泊车提示系统研究

我国汽车在近年来产量飞速增长,导致城市停车场泊车系统出现各种各样的问题,例如,因为停车场车辆过多而找不到停车位、泊车时忘记车辆位置等。为了解决这些问题,我们提出了使用STC51单片机技术、物联网无线传感器技术,结合Wifi模块、蓝牙模块、超声波传感器、红外避障传感器、显示屏、蜂鸣器、LED灯等,构造出一套智能泊车提示系统。用户可以通过手机APP连接蓝牙系统,利用蓝牙系统控制停车位信息,通过Wifi模块将车位信息显示在液晶屏上传给车辆,并且在显示器中实时显示计费系统。     

基于RFID的车辆自动化智能管理系统研究

基于解决当前小区停车难问题的目的,采用ETC电子不停车收费相关技术,设计了小区车辆自动化管理系统;通过对实际需求的分析,所设计的系统主要包括3个部分:车辆出入管理、定位管理以及停车管理。其中,车辆出入管理系统对进入的车辆进行身份的自动识别和确认;车辆定位管理系统负责对在小区中行驶的车辆进行追踪定位;车辆停车管理系统则为进入的车辆自动分配车位和开启车位锁。经过实践的证明,本系统性能良好,具有较好的实用价值。     

基于智能红外遥感的车库车辆自动识别引导管理系统

设计一种基于智能红外遥感的车库车辆自动识别引导管理系统。该系统中的智能红外遥感控制器与车辆超高检测器、车辆自动识别引导器直接相连,是系统的控制核心,对于不符合入库要求的车辆,其将传递车辆信息给管理人员。车辆进入车库前,车辆超高检测器将进行车辆高度检测,禁止超高车辆入内。车辆自动识别引导器根据临时用户、长期用户和无效用户的车辆识别和引导流程图,对进入到车库的车辆进行识别,给出路线引导方案。路线引导方案将通过智能红外遥感控制器传输到用户车辆中实现智能引导。实验结果表明,该设计系统的能耗少、引导效率高、有效性强。     

基于超声波和环形线圈的车位信息检测

车位检测是停车场监管系统的重要内容,针对大型地下车库的多通道结构和环境特征,提出了以通道为单元的车位检测方案。该方案以单片机AT89S52为核心,基于超声波探头和环形线圈传感器,通过对车辆行驶方向(进入或离开通道)的判断实现对地下车库车位检测。研究内容主要包括环形线圈电路设计、超声波收发电路设计以及基于单片机的车位检测软件设计。实验表明:系统能有效检测车位信息。     

基于LoRa的智慧停车管理系统设计

针对停车场车位信息流通不顺畅,停车位供不应求的问题,以MSP430微控制器为核心,设计了基于LoRa的智慧停车管理系统。系统由采集节点、网关、云服务器和客户端组成。地磁传感器检测停车位的状态,并利用RFID射频识别技术识别车辆信息,并通过LoRa实时将车位状态及车辆信息发送给网关,同时网关GPRS模块将数据上传到云端并进行分析处理,网页端实现停车信息的动态管理。测试结果表明,设计的系统降低了停车场空置率,可以实现线下停车场资源共享。     

基于PLC的立体车库设计与实现

随着城市汽车数量的不断增加，停车难问题己经成为城市的一个普遍现象。本文提出了一种立体车库的设计方法。该车库通过可编程控制器（PLC）控制车位的移动，从而实现车位从平面到空间的转化。升降横移式立体车库利用托盘来移动车辆，通过多层车位的升降来存取车辆。本文介绍了立体车库的结构及功能，分析了立体车库控制系统的总体结构，并重点阐述了控制系统的硬件配置、软件设计，该立体车库实现了存取车的自动化，并利用昆仑通态组态软件完成了车库运行的监控。     

小区出入一体化智能管理系统研究与设计

本管理系统适用于所有小区,在管理小区大门的主机上安装上门禁系统,业主拥有一张蓝牙卡,业主进入小区时,通过蓝牙技术感应,便能自动开门。同时,在车库道闸的主机处安装射频读卡器,在本小区私家车上安装电子标签,利用RFID技术实现业主不停车出入小区车库。当本小区业主和车辆进出小区时道闸自动放行,非本小区人员及车辆进出小区时道闸自动上锁,并发出警报提醒门卫及时处理。智能管理系统对提升小区形象、方便业主出入、减少门卫配置降低物管成本、防盗等具有重大意义。充分发挥了小区智能化管理,使小区业主和车辆出入管理的更加高效。     

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.