基于蓝牙通用模块的多路传感器数据传输系统设计

为解决在某些恶劣环境下工业现场设备布线难的问题,本设计提出一种以MSP430F149为控制芯片和通用蓝牙芯片GC-02为传输介质的多路传感器数据传输系统。本设计由基于蓝牙模块的数据传输设备和蓝牙接入设备搭建了一套用于工业控制领域的多路传感器蓝牙数据传输系统。本设计给出了该蓝牙数据传输系统具体的硬件和软件设计,并分析验证了实验结果。     

一种实用的蓝牙数控系统实时数据传输技术

蓝牙是一种短距离无线通信技术,用于代替数字设备和计算机外设间的电缆连接以及实现数字设备间的无线网络,在通信、网络、芯片、软件等,甚至消费类电器和汽车制造等方面得到了广泛的应用。但是在工业控制领域的应用还非常有限。详细阐述了蓝牙无线技术在实时数据传输系统中的应用,对蓝牙的特点及关键技术进行了理论研究,并最终实现了与控制系统间的无线实时数据传输。实验结果表明蓝牙无线传输系统能够正确、稳定地实现与数控机床的无线数据传输,而不会对机床运行产生任何干扰。     

蓝牙技术在数控系统实时数据传输中的应用研究

蓝牙是一种短距离无线通信技术，用于代替数字设备和计算机外设间的电统连接以及实现数字设备间的无线网络。在通信、网络、芯片、软件等，甚至消费类电器和汽车制造等方面得到了广泛的应用。但是在工业控制领域的应用还非常有限。研究如何将蓝牙技术应用于数控系统是非常有实用价值的，为实现控制方式的多样性提供了一种新的思路。本文详细阐速了蓝牙无线技术在实时数据传输系统中的应用，对蓝牙的特点及关键技术进行了理论的研究。并且最终实现了与控制系统间的无线实时数据传输。实验结果表明蓝牙无线传输系统能够正确、稳定地实现与数控机床的无线数据传输，而不会对机床运行产生任何干扰。     

多路近距离无线数传系统设计与实现

提出了一种用于近距离数据传输的多路无线通信系统的设计方案。采用基于nRF2401芯片的数传模块,设计具有多路收发功能的无线系统,可以用于智能家居系统之间的数据传输、控制,相比传统的无线数据传输系统具有成本低、传输速度快、稳定性高的优点。     

基于蓝牙4.0的低功耗无线传感器网络节点设计

针对国内外一些可穿戴式智能设备的无线传感节点的设计方案,有一些是基于集成了无线传输协议的控制器,他们有数字处理能力有限,硬件系统固定,缺乏单元灵活性,特别不利于多路参数并行处理的问题,设计了一种基于蓝牙4.0的低功耗无线传感器网络节点。使用了基于蓝牙4.0技术的CC2540芯片和Xilinx公司的低功耗FPGA芯片,并结合手机应用程序完成了系统设计。并且在硬件设计和软件设计上注意降低整个系统的功耗。测试结果表明,系统在低功耗设计的基础上,可以准确的将数据通过蓝牙发送出去。该系统具有低功耗、低成本、开发难度小等特点,可适用于可穿戴式智能设备等领域。     

蓝牙4.0无线传感网数据采集及以太网传输设计

介绍了蓝牙4.0无线传感器网络及以太网传输技术,以基于蓝牙低功耗技术的CC2540射频单片机为核心,控制多种传感器来进行数据的采集,搭建星形拓扑的蓝牙无线传感器网络,并通过以太网接口将采集到的数据传输给远程的TCP服务器。实验结果表明,本系统具有体积小、功耗低、远距离传输等优点。     

基于蓝牙技术的粉尘检测器的设计

文中以新华龙公司的C8051F020为主控芯片和第一代蓝牙模块芯片BCM-05为通信模块,设计一个蓝牙空气粉尘检测器,使之与蓝牙接入设备搭建一套用于工业控制领域的的空气粉尘检测系统。文章给出了该蓝牙粉尘检测器的硬件设计和该系统的软件框架。硬件设计主要包括各部分电路介绍,软件框架将给出粉尘监测器与蓝牙接入设备的通信流程及相关程序。     

基于Si4432的无线射频遥控系统设计

射频技术在工业现场数据传输中的应用可降低传输成本、提高传输效率。但工业现场对数据传输的安全性和可靠性要求很高,如何保证射频数据传输的安全和稳定,是射频技术应用于工业现场数据传输的关键。利用Si4432射频芯片和单片机开发了一种新的无线射频遥控系统。系统通过终端节点发送控制命令,由主节点实现射频网络的组网和网络管理,由路由节点实现数据的接收和转发。系统采用载波侦听多路访问/冲突避免（CSMA/CA）协议,避免了因通信冲突引起的信道阻塞和数据丢失;利用调频管理机制,对射频网络频段进行管理。系统实现了组网和网络维护功能,保证数据的正确传输,提高了系统的可维护性。该系统可广泛用于冶金、水泥等需对设备进行远距离控制的行业。     

一种无线传感器网络数据采集系统的设计与实现

提出了一种无线传感器网络数据采集系统的设计方法,并以温度数据采集为例,介绍了该系统的软硬件实现方法.系统使用短距无线传输与远距离以太网传输将多个传感器数据传输到后台监测中心,并在后台监测程序开发中使用监视与控制通用系统(MCGS)组态软件实现数据的可视化.本系统通用性强,只要更换传感器就可实现对任意传感器数据的采集,可满足各种使用需要.     

基于Android系统的蓝牙便携式血脂仪的设计

蓝牙以其很强的灵活性、操作方便、成本低等优点,在很多领域得到应用.本文介绍了一种采用蓝牙技术的便携式嵌入式血脂仪,该仪器具有蓝牙无线通信功能.数据采集模块使用MSP430作为主控制芯片,增加了蓝牙传输模块,将采集到的数据发送至终端.终端接收模块使用ARM 11为内核的S3C6410芯片,建立了基于Android智能系统的数据接收和分析终端.智能终端利用Android蓝牙的API开发类,对终端蓝牙实现打开蓝牙、搜索附近蓝牙设备等基本操作,再利用Socket连接,实现数据传输.最后利用Eclipse开发工具,完成Android系统的上层应用的开发.     

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.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

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.     

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