测试与测量

万兆以太网线外串扰测试套件,具有MSO混合测试功能的虚拟示波器,PXI Express定时与同步控制器,具备集成化GPS收发器的PXI同步模块,覆盖波长超过2μm的光谱分析仪，台式数字万用表……     

基于CAN总线的发动机ECU检测系统研发

基于Freescale MC9S12XEP100的汽车发动机ECU检测系统是通过CAN总线进行上中下三级系统的数据传输。它可以实现对通用性发动机ECU的硬件和功能的可靠性进行检测,主要测试内容包括开关量、模拟量、频率量和负载驱动等模块测试。试验证明本系统具有效率高,准确度高,成本较低等优点。     

测试与测量

用于维护测试的手持式数字万用表;提供高通道数信号的系统开关;完善PCI Express 2．0测试解决方案的串行分析仪;能够以600MB/s速率持续致据流盘的PXI设备;高效的汽车传感器测试系统     

微型脉冲供电式光电倒置开关的检测系统

针对放入式电子测压器在测试火炮膛压时,内部的微型脉冲供电式光电倒置开关无法正常上电的问题,设计了倒置开关的检测系统,验证了倒置开关的可靠性。该检测系统由CPLD控制A/D转换器的数据采集和外部闪存的存储,将采集的数据传输到计算机中进行分析处理。试验证明,该检测系统在高温、常温和低温任意一个需要测试的环境满足信号的采样频率,并根据信号参数验证倒置开关的可靠性。该检测系统精确度高,成功证明了倒置开关的微功耗和高可靠性,对放入式电子测压器的正常工作具有重要的意义。     

基于PXI的光电瞄准设备自动检测系统

光电瞄准自动检测系统是在PXI测试总线技术的基础上,有机地结合计算机技术和虚拟仪器测量技术,研制开发出的新一代检测系统。检测系统采用了PXI总线技术和规范的系统结构框架,通过选取NI公司的PXI-1010混合机箱、PXI-8187主控制器、SCXI-1130矩阵开关、SCXI-1167继电器驱动模块、PXI-6509数字I／O、PXI-6229数据采集、PXI-4070数字万用表、PXI-5122数字化仪功能模块以及EXC公司的DAS-429cPCI／Mx、Condor公司基于cPCI的MIL-STD-1553和DDC公司的SB．36200IX模块,并利用LabVIEW开发工具开发出检测系统,而且还解决了PXI模块硬件及驱动程序与被测产品匹配问题,实现了基于PXI虚拟仪器的软面板技术。该检测系统是根椐标准的数据采集——信号分析与处理——输出及显示的结构模型而建立的,实现了光电瞄准系统数据的实时采集、处理和显示。光电瞄准自动检测系统样机实现了产品的自动化检测,具有一定的技术先进性。     

汽车超载监控系统信号传输模块的设计

当前的汽车超载监测系统无法处理汽车行驶状态的随机性问题,使得系统中的信号传输模块存在信号传输稳定性差和准确率低的弊端。因此,塑造汽车超载监控系统信号传输模块,模块中供电电路、信号传输芯片、定位天线、传输天线和信号传输接口电路共同协作。供电电路为模块提供其正常工作电量。信号传输芯片进行汽车超载监控信号的收发和整流工作,经其整流后的监控信号将传输到定位天线、传输天线和信号传输接口电路。模块通过定位天线和传输天线获取汽车超载监控信号的位置,并将监控信号通过无线网络传输到使用者的特定设备中。使用者利用信号传输接口电路修改错误监控信号,完成对汽车超载情况的有效管理。软件给出监控信号传输流程图和模块的初始化语言。实验结果表明所设计的模块拥有较高的传输稳定性和传输准确率。     

NI为汽车电子测试提供解决方案

随着汽车电子的迅速普及,半导体技术将为汽车提供越来越多的功能。电子化、智能化、信息化、集成模块化,将是汽车电子未来发展的方向。伴随这一趋势,车身各电子器件、电路的独立测试以及综合测试变得越来越重要。NI通过将计算机的测量设备(如PXI)与虚拟仪器相结合,为汽车领域提供了一个统一的测试平台,该平台基于NI的LabVIEW和PXI,并包含来自NI的数据采集、信号调理、运动和视觉、CAN,以及DIAdem分析和报告生成软件等标准技术。可开发车载通信系统、同步CAN和数据采集测量、发动机扭矩控制、测试数据管理、ECU、ABS,和测试报告…     

行业视点

正新品推荐泛华恒兴推出eCAR汽车电控单元通用测试平台北京泛华恒兴科技有限公司(简称:泛华恒兴)近日正式推出了eCAR汽车电控单元通用测试平台。该平台可用于BCM/DCM/TCU/ECM等不同种类电控单元的功能测试、耐久测试和HIL测试。eCAR汽车电控单元通用测试平台适用于汽车上各类ECU的性能与耐久测试,不仅可完成对ECU模拟过压、欠压和正常电压供电,ECU外部传感器信号仿真测试,采集ECU输出的信号并可手动监测任意通道的信号,进行模拟负载或真实负载测试,并提供灵活的负载控制模块,可对ECU进行     

汽车电喷发动机故障检修的程序和方法

电子控制燃油喷射(EFI)发动机简称为电喷发动机。电喷发动机与化油器式发动机不同的部分有燃油供给系统、空气供给系统、电子控制器(ECU)系统,附图是桑塔纳2000型轿车电喷发动机电子控制器(ECU)的控制电路。故障检修程序 1.电喷发动机出现故障后,首先打开点火开关,查看仪表盘上     

高速数据传输系统的设计与实现

随着高分辨率遥感器和空间飞行器数据量和传输带宽的不断增大,高速数据传输系统的设计与实现有着越来越重要的意义。文章设计实现了基于FPGA的高速数据传输系统,该系统主要包括光纤通信模块与PCIe通信模块。采用光纤收发器与FPGA内部的GTX相连的方式完成光纤通信,对接收进来的数据处理后通过PCIe总线传输给本地计算机,从而完成整个系统的高速数据传输。最后对系统进行了测试验证,测试结果表明该系统具有高速、可靠、稳定的特点,具有很好的实用价值。     

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.     

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.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first