非标准视频图像信号的实时采集与稳定显示

设计了基于PCI总线的非标准视频图像信号的实时采集处理系统.首先由主机对非标准视频图像信号进行频谱分析提取出同步信号的参数,及时传递给DSP,然后通过行频调整、自动锁相等环节对同步信号的参数进行调整,由DSP产生高精度的同步信号,经倍频锁相后得到图像采集所需的采样脉冲.系统与主机之间采用PCI总线接口芯片PCI9054以DMA方式进行通讯,利用PCI总线的高速传输的特性完成图像的实时采集与显示.实验结果表明,系统采集传输速度达到25 MB/s,能够快速实现非标准视频图像信号的实时采集与稳定显示.     

基于PCI总线的非标准视频图像的实时采集与显示

为了实现非标准视频图像信号的实时采集与显示,设计了以DSP和CPLD为核心的基于PCI总线的图像采集系统.首先利用DSP进行频谱分析从非标准视频图像信号中提取出同步信号的参数,并产生高精度的同步信号,同步信号经过倍频锁相后产生图像采集的采样脉冲,CPLD内部编程对采集逻辑进行控制.系统与主机之间采用PCI总线接口芯片PCI9054进行通信,以DMA的方式将采集的数据传送给主机.实验结果表明,系统能够快速实现非标准视频图像信号的实时采集与显示.     

基于PCI总线的实时红外图像采集处理系统

简单介绍了PCI总线的特点,数据传输协议以及作为专用PCI总线协议控制芯片的美国AMCC公司生产的S5933的功能结构,并介绍了一种采用PCI总线作为数据传输接口的高速实时红外图像采集处理系统,该系统采用DirectDraw技术实时显示红外图像,减少了系统的响应时间,更好地满足图像实时显示的要求。     

基于USB2．0和线阵CCD的高速数据采集系统设计

为了解决电荷耦合器件(CCD)图像数据高速采集和实时传输处理问题,设计了一种基于USB2.0的高速CCD数据采集系统.系统采用可编程逻辑(CPLD)实现时序控制和逻辑控制,专用视频信号处理芯片XRD4460实现高速A/D转换;为了保证CCD图像数据高速传输,采用先进先出(FIFO)作为CCD数据流与8051单片机之间的缓存区进行数据缓存,采用CY7C68013接口芯片的GPI接口模式完成控制信号的发送以及实现采集系统与计算机之间的数据高速传输.     

基于PCI-Express的高速数据交换设计及应用

提出了利用PCIE总线技术实现数据高速传输的方案,结合共享内存、DMA等技术设计了基于PCI—Express总线的高速数据传输卡．实现了将采集的数据实时传送到PC的共享内存缓冲区,数据传输采用DMA方式。采用接口器件PEX8111实现PCI—Express总线到PCI总线的桥接。使用FPGA编写PCI总线的接口逻辑,最后进行测试。     

基于PCIe总线的航空视频采集记录系统的设计

PCIe总线不仪硬件接口简单,软件和PCI总线完全兼容,而且传输速度数十倍于PCI总线.针对载机任务系统实时视频采集记录的需求,设计了一种基于PCIe总线的航空视频采集记录系统,利用现场可编程逻辑器件(FPGA)实现了视频数据流的编解码和PCIe桥接口的设计,简化了硬件接口设计,提高了系统的工作效率.系统在某型数字化对...     

S400β模式1394B总线接口单元设计与实现

新一代航空电子系统大量采用分布式智能终端,大容量、高速、实时图像数据成为其显著特征。IEEE 1349B是广泛应用的高速串行总线,具有传输速率高、可靠性好、扩展性强的优点,是目前实现数字图像及视频传输的首选方案之一。文章基于PCI架构设计出S400β模式的1349B总线接口单元。基于Vxworks操作系统开发出了该接口单元的驱动和主机PCI接口驱动开发。通过1394B总线标准测试设备的验证,该接口单元可以实现400Mb/s的高速数据实时传输,证明了该接口单元的可行性和可靠性,对嵌入式高速IO设计具有参考价值。     

基于嵌入式硬件平台的划片机视觉系统设计

结合划片机视觉的工艺要求,设计了基于外部设备互连PCI总线嵌入式视觉系统,选用S3C2510+ARMLINUX嵌入式软硬件架构,通过S3C2510内置PCI控制器控制PCI总线接口与图像采集模块连接,获取实时图像。介绍了系统的硬件构成、Boot Loader的移植、PCI设备驱动程序的编写方法,以及获取视频数据的上层软件构成。     

基于PCI的高分辨率医用X光视频图像采集及处理系统

采用影像增强器 CCD采集方式实现了高分辨率X光医学视频图像采集与处理系统，系统包括三大模块：视频图像采集部分、图像数据传输部分和图像后处理部分，硬件电路采集的数字图像通过高速PCI总线与PC机进行视频图像数据传输，再由图像处理软件对图像作后续处理；软件包括PCI设备驱动程序以及图像后处理软件平台，采用Microson的Visual C 6．0语言编写。本文详细描述了X射线医学视频图像采集与处理系统工作原理和工作过程，重点阐述在基于Windows平台的PCI设备驱动程序编制过程中碰到的关键问题，在医学图像数字化采集及传输方面作了有效的探索并取得了一定的成果，具有普遍的应用意义。     

基于PCI-Express的高速数据交换设计及应用

提出了利用PCIE总线技术实现教据高速传输的方案,结合共享内存、DMA等技术设计了基于PCI-Express总线的高速数据传输卡,实现了将采集的数据实时传送到PC的共享内存缓冲区,数据传输采用DMA方式.采用接口器件PEX8111实现PCI-Express总线到PCI总线的桥接.使用FPGA编写PCI总线的接口逻辑,最后进行测试.     

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.