基于FPGA 的 ARINC429 总结接收发送系统的设计

根据ARINC429总线数据输入标准的要求,提出了一种基于FPGA的透明数据传输系统方案。该方案实现四路ARINC429信号接收,两路ARINC429信号发送的功能。重点研究接收发送系统的硬件电路设计和使用VHDL语言的软件开发,并给出部分VHDL语言描述。经验证,该方案能较好地满足ARINC429通信系统的要求。     

基于FPGA的多路ARINC429总线设计

提出了一种基于FPGA的多路ARINC429总线接口设计方法,该方法利用模块FPGA资源实现ARINC429数据的收发,解决了专用芯片价格昂贵格式固定的缺点。实验证明,该方法能够灵活实现多路ARINC429总线数据的接口功能,简化硬件电路设计。     

基于PC104的429通信总线的设计与实现

文章介绍了一种基于PC104的嵌入式硬件系统平台的ARINC429总线接口模块的设计方法, 可用于采用ARINC429总线的电子设备的数据传榆,并说明了PC104模块和429总线通信的硬件连接 和软件设计。     

基于FPGA的ARINC429通讯系统的设计与实现

ARINC429通讯总线在现代飞行器中得到广泛应用,需要研制与ARINC429通讯相应的测试系统。为了实现飞行器多路ARINC429总线与测试系统外围部件互连（PCI）总线之间的数据通讯,在分析ARINC429通讯协议的基础上,利用现场可编程门阵列（FPGA）芯片实现了独立的四路接收两路发送的ARINC429数据通讯以及系统与上位机的PCI通讯。该系统收发数据灵活、可靠,与传统的DSP加PLX9054加FPGA方案相比,电路简单,板卡体积小,功耗低,解决了飞行器多路ARINC429与测试系统的双向通讯。     

用FPGA实现ARINC429接口和总线数据接收

针对目前ARINC429航空总线的应用研究现状,分析常用ARINC429协议芯片的特点,根据ARINC429总线的电气特性,采用光电藕合器HCPL－0631实现ARINC429接口和电平转换,并通过FPGA完成ARINC429总线数据的接收。重点介绍接口电路设计和FPGA中的软件开发,与传统的ARINC429总线数据接收系统相比,具有接口电路简单、具备一定的抗干扰能力、不受协议芯片速率限制等优点,此方法已成功应用于产品中,并对其他串行总线数据接收具有借鉴意义。     

TMS320F2812与ARINC429数据总线之间的通信设计

ARINC429总线是一种应用广泛的航空数据总线,主要用于航空电子设备和系统之间的通信。在描述AR-INC429总线和HS-3282的基础上,提出了TMS320F2812 DSP与ARINC429数据总线通信的设计方法。该系统主要由429数据收发模块和CPLD逻辑控制模块组成。429数据收发模块采用429专用协议收发芯片HS-3282完成429总线数据的格式转换和协议处理,CPLD逻辑控制模块使用CPLD地址译码产生HS-3282所需要的初始化、接收使能、发送使能信号,TMS320F2812通过CPLD逻辑控制对HS-3282进行时序控制来完成TMS320F2812与429总线的通信。结果表明,该系统能实现TMS320F2812与ARINC429数据的100 kb速率的通信,并完成总线数据格式转换。     

基于ARINC 429总线的机载计算机通信模块设计

ARINC 429是目前最常用的航空数据总线,ARINC 429通信模块是航空电子机载计算机系统中重要的组成模块。为了构建机载数据传输稳定的通信系统,文章设计了基于ARINC 429总线的通信模块。采用DSP、LBE总线接口逻辑和双口内存的模块设计结构,以DSP为数据收发控制核心,总线接口提供通信模块与其他模块之间的数据传输和驱动控制,通过双口内存实现429通信接口模块与主机的连接,所有通信接口模块的操作、接收发送方式的切换以及波特率的选择都可以通过软件配置来完成。实践表明,该模块能够实现ARINC 429总线系统的相关功能,实时可靠灵活地收发数据,解决了多路ARINC 429数据总线之间的双向通信问题。     

基于PCI总线的ARINC429通讯模块研制

ARINC429是目前最常用的航空数据总线,ARINC429通信模块是航空电子系统中重要的组成模块。为了构建航空电子测试系统,设计了基于PCI总线的ARINC429通讯模块。采用DSP+FPGA的硬件结构,利用DSP实现了通讯模块的PCI接口,并利用FPGA实现了ARINC429通信协议的编解码逻辑。测试表明,该通讯模块能实时可靠灵活地收发数据,解决了飞行器多路ARINC429数据总线之间的双向通信问题。     

ARINC429总线信号数据的解析探析

通过本课题的研究和通用ARINC429总线数据解析的研究,实现了对多种外场可更换单元的ARINC429总线接口测试以及相应的ARINC429通讯板卡数据的解析解决方案的实验。     

一种ARINC429总线通信软件通用实现

阐述ARINC429总线的特点，ARINC429总线软件实现过程中的问题，机载嵌入式平台下ARINC429从驱动软件和上层通信协议的一种通用实现方法。     

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.     

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.     

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