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1.
本文介绍了物联网系统体系架构和RFID技术工作原理,分析了物联网结构特点,在RFID信息采集技术的基础上,给出了一个基于RFID的物联网系统架构,为物联网应用提供了一种综合、可靠的解决方案。  相似文献   

2.
基于RFID的物联网技术日趋成熟,应用领域和范围也逐步扩展。本文将RFID技术与节目磁带管理相结合,分析了基于RFID物联网的磁带管理需求、流程、网络架构和编码标准,提出了一种模式,使得节目磁带成为物联网中的"物",能遵循物联网中的协议实现信息交换,达到磁带识别和管理的目的。  相似文献   

3.
为了提高蔬菜质量溯源系统信息的实时性、准确性和可靠性,本文介绍了无线射频识别技术( RFID),提出了基于RFID的蔬菜质量溯源系统架构,详细分析了蔬菜销售过程的信息流程,设计了基于RFID的蔬菜质量溯源系统。与基于条形码的系统相比,采用基于RFID的蔬菜质量追溯系统,具有数据采集过程更智能、速度更快、识别率更高的优点。  相似文献   

4.
物联网的应用实例与效益   总被引:5,自引:0,他引:5  
十年前,麻省理工学院在同EAN.UCC组织(全球统一标识系统)共同进行一个研究项目时,创造了“物联网”一词。该项目和全球产品电子代码管理中心的成立促生了以RFID为基础的解决方案,使供应链发生了革命性的变化。据预测,到2005年,RFID标识的物体和物联网将会无处不在。物联网的开发是围绕P,,FID的应用进行的,然而依托的技术不仅仅是RFID。物联网的合理结构是金字塔型的,是根据需要,合理性,局限性和商业应用案例和效益在身份标识,数据存储和能力上结构分层的,其合理性取决于经济效益,其特点和行为设计的合理性也取决于实际效益。  相似文献   

5.
本文就当今公共交通系统智能化方向发展的需求提出了一种基于RFID的智能公共交通物联网系统的总体方案,重点介绍了该系统管控终端的软硬件实现方法。系统的管控终端采用低成本,低功耗的设计,能够通过RFID标签有效地采集系统中的公共交通工具信息以及用户卡信息。管控终端向用户(乘客)提供了便捷的非接触式读卡器和友好的人机交互界面,用户可以通过智能公交卡方便地乘车或是租借公共自行车。借助该系统,运营者可以建立基于销售终端安全模块(PSAM)的智能卡预付费消费系统,同时可以对公共交通资源进行有效地管理与控制。  相似文献   

6.
物联网中RFID智能门禁系统研究   总被引:1,自引:0,他引:1  
陆璐 《信息技术》2013,(7):87-90
针对传统的门禁系统结构和功能相对单一,处理效率较低,信息存储容量较小,难以满足物联网中安全技术防范领域对主动性、实时性及灵活性等需求的问题,文中基于物联网RFID技术,研究了RFID智能门禁系统,提出了RFID智能门禁系统架构,研究了智能门禁控制器和门禁管理系统等核心内容。物联网中RFID智能门禁系统不仅可用于重要进出口的安全管理,还有助于有序化管理。  相似文献   

7.
伴随着物联网技术的兴起,射频识别(RFID)技术受到更为广泛的关注,其安全特性与面临的隐私问题制约了其应用。针对这些问题,学者提出诸多安全协议以应对,然而现有协议大都将RFID读写器作为传递数据的工具,而没有充分开发读写器在协议中的运算作用。本文设计了一个读写器参与识别计算的协议,标签和后端数据库存储不同的秘密,并通过读写器建立联系,这样不仅可以抵抗常见的攻击,而且可以抵抗因后端数据库所存储的识别表意外失窃所带来的对整个系统的危险。  相似文献   

8.
本文从研究背景入手,介绍ZigBee网络技术协议和RFID技术相关概念,分析了物联网系统中将二者结合起来的作用和意义,并且提出了ZigBee和RFID两种技术在接口端结合的方案。  相似文献   

9.
目前,物联网(Internet of Things,IOT)已经成为一个热门话题引起了人们的关注。物联网是用一定的通信技术(如RFID、GPS)按约定的协议将物品与互联网连接,进行信息交换,以实现监控管理、智能化识别、定位和跟踪的一种网络。本文提出了物联网监控终端硬件设计,整个系统是以广州友善之臂公司(GuangZhou Friendly ARM)生产的TINY210核心板为主控制器,结合各功能模块,综合运用嵌入式系统、通信系统等提出一套低成本功能强的应用系统的设计。  相似文献   

10.
基于射频识别技术(Radio frequency identification technology,RFID)和近距离无线组网通讯技术(ZigBee:紫蜂)这两大物联网关键技术,设计以ZigBee协议作为传输协议的物联网主从节点以及RFID读写模块,得到了物联网实验系统的总体方案,并实现了一套完整的物联网实验系统硬件平台.测试结果验证了该实验系统完全满足设计要求,可以应用于教学实验,也可作为其他物联网应用系统的开发.  相似文献   

11.
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.  相似文献   

12.
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.  相似文献   

13.
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.  相似文献   

14.
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.  相似文献   

15.
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.  相似文献   

16.
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.  相似文献   

17.
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.  相似文献   

18.
It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output(MIMO) communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.  相似文献   

19.
The effect of laser microbeam trapping the bioparticles has been appfied widely in the biology .However the micromechanism of the acting that realizes the laser-microbeam trapping bioparticles is still lacking. In this paper ,the act microchenism of the gradiant force of laser microbeam for the bioparticles is analysed by means of quantum theory ,The result accords with our experiment.  相似文献   

20.
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.  相似文献   

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