基于单片机的室内无线精确定位小车的设计与制作

文章介绍了一种基于超声波测距技术的室内无线精确定位智能小车控制系统的设计。该系统以msp430f149单片机为主控芯片,利用步进电机带动超声波传感器组进行定位数据采集,通过电子指南针的角度检测控制小车进行方向定位。利用n RF905无线模块实现了双机无线通信及数据交换,将采集数据绘制成坐标点显示在控制端触摸屏上,实现触摸屏上小车位置的显示,并通过点击触摸屏实现控制小车找相应位置的功能。     

一种改进的汽车安全距离计算仿真系统

针对红外测距与超声测距在汽车安全距离计算方面存在精度低的问题,设计了一种基于PC机、单片机AT89S52、无线摄像头、无线通信模块STR-30的单目视觉测距仿真系统。该系统首先通过单片机控制模型小车运动,然后由后方小车上的无线摄像头实时采集前方小车的车牌图像并传入上位机,根据图像特征分析算法结合针孔成像与坐标几何变换原理,计算得到两车之间的距离并在上位机上实时显示,最后由STR-30模块将车距信息传输至后方小车运动控制单元,通过该控制单元进行小车驾驶状态的实时调整,从而实现小车制动系统的智能调控。在Lab VIEW环境下,仿真并验证了系统具有较高的可行性和鲁棒性。     

基于RF的多点温度采集系统的设计与应用

为了研究太阳光照射条件下汽车内各个部位及车内空气温度的变化规律,设计了无线多点温度采集系统。该方案以STC89C52单片机为核心,采用DS18B20集成温度传感器测量车内各部位的温度,通过nRF905射频无线收发模块进行无线数据传输,使用VB语言编写上位机监控程序,将测量数据发送到上位机监控软件进行显示和数据保存。该温度采集系统实现了汽车室内外温度数据的多点测量、无线传输、数据显示与数据自动保存,为研究车内温度变化规律提供了实际的数据。     

基于WIFI技术的搜救小车的设计

为了在灾难现场等复杂环境下进行生命迹象、视频图像数据、环境参数等现场环境的实时监测,文章设计一种基于WIFI技术的搜救小车。Windows监控端通过RT5350路由器与STC12C5A60S2单片机通信,发出控制信号给直流马达控制器,实现小车行动控制。热释电模块、摄像头模块、温度传感器模块、烟雾传感器模块进行生命迹象、视频图像数据、温度数据、有害气体数据等现场环境信息的采集,并实时回传给Windows监控端并显示。     

基于C8051单片机的无线心电监护系统设计

介绍一款低功耗无线心电监护系统,它由数据采集盒和PC监护终端两部分构成。数据采集盒在C8051F320单片机控制下实时采集心电数据．通过NRF24L01无线模块发送给PC监护终端。终端中的C8051F320通过NRF24L01模块接收心电数据．并由自带的USB接口将数据传送给PC机进行心电波形的显示和分析处理。该系统可实现多个病人心电信号的采集、存储和分析等功能,小巧便携、方便实用。     

基于C8051单片机的无线心电监护系统设计

介绍一款低功耗无线心电监护系统,它由数据采集盒和PC监护终端两部分构成.数据采集盒在C805117320单片机控制下实时采集心电数据,通过NRF24L01无线模块发送给PC监护终端.终端中的C8051F320通过NRF24L01模块接收心电数据.并由自带的USB接口将数据传送给PC机进行心电波形的显示和分析处理.该系统可实现多个病人心电信号的采集、存储和分析等功能,小巧便携、方便实用.     

基于温湿度检测的无线遥控智能小车的设计

基于STC89C51单片机设计了一种具有温湿度测量的无线智能遥控小车。小车具有遥控启动、停止功能、避障功能、测量和显示温湿度值及行驶距离值、并把这些数据通过无线发送接收方式传给手持设备显示和存储。     

多通道温度数据采集系统设计

针对恶劣环境的工业现场以及高科技大范围的农业现场,布线困难,浪费资源,占用空间,可操作性差等问题提出一种基于无线通信的温度采集系统解决方案。多通道温度采集系统分为温度数据采集部分和温度数据处理显示部分。温度数据采集部分由单片机、温度传感器和无线数据发射模块构成。温度数据处理显示部分由单片机、无线数据接收模块和显示模块构成。系统能够实现温度数据采集,利用无线收发芯片进行数据传送和液晶显示。本系统数据处理功能强大,数据直观显示,界面友好,性价比高,广泛应用于诸多工业领域。     

一种基于蓝牙的无线传感网测控小车设计

针对无线传感测控数据与移动互联网相结合的需求,设计并实现了一种基于蓝牙和Android智能终端的无线传感网测控小车。利用由CC2530组成的无线传感网进行节点数据的采集和通信,IAP15F2K61S2单片机控制的测控小车进行数据的汇聚和转发,在Android终端上实现数据的存储和显示。实验结果表明,该方案能够对传感数据、物联网和移动互联网进行有效融合。     

磁场分布测量系统的设计

介绍了磁场分布测量系统的硬件结构和软件设计方案.该系统将单片机为核心的小系统,结合霍尔传感器作为前端的数据采集系统,将采集到的数据利用串口传送到PC主系统.在LabVIEW环境下对数据进行分析、处理、显示并保存.经测试,系统能方便灵活地测量磁场,3个方向的测量范围均可达到-900～+900 Gauss,测量精度达1%,并且磁场的测量结果能通过三维图形显示.     

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