基于红外反射式光电传感器的智能循迹小车

介绍了一种智能寻迹小车的设计与实现。基于红外反射式光电传感器的寻迹原理,采用AT89C52单片机为核心控制器件,通过红外传感器检测路面信息,单片机获取路面信息后,进行分析、处理,最后控制步进电机调节转向和转速。实验表明：该系统抗干扰能力强、电路结构简单,能够准确实现小车沿给定的黑线快速、平稳行驶。     

基于红外光电传感器的智能车自动寻迹系统设计

介绍了一种自动寻迹智能车的设计,研究了采用红外反射式光电传感器作为路径采集模块实现自动寻迹的软硬件设计方法.系统采用Freescale 16位单片机MC9S12DG128为核心控制器,利用11个红外光电传感器构成的光电传感器阵列采集路面信息,单片机获得传感器采集的路面信息和车速信息,经过分析后控制智能车的舵机转向,同时对直流电机进行调速,从而实现智能车沿给定的黑线快速平稳地行驶.介绍了光电传感器的寻迹原理,讨论了光电传感器排列方法、布局、间隔等对寻迹结果的影响.     

基于LDC1000电感传感器单片机循迹小车

本设计是基于LDC1000电感传感器单片机控制的简易自动寻迹小车系统,旨在设计出一款可以按照预设的轨迹行走.控制系统以STC12C5A60S2、MSP430F5529为控制核心,用单片机产生PWM波,控制小车速度.利用LDC1000对路面铁丝轨迹进行检测,并确定小车当前的位置状态,单片机对采集到的信号予以分析判断,及时控制驱动电机以调整小车转向,从而使小车能够沿着铁丝轨迹自动行驶,实现小车自动寻迹的目的.     

基于光电传感器的智能车自动寻迹系统设计

介绍了一种自主寻迹智能车的设计,研究了采用红外反射式光电传感器作为路径采集模块实现自动寻迹的软硬件设计方法.系统采用Freescale16位单片机MC9S12DG128为核心控制器,利用11个红外光电传感器构成的光电传感器阵列采集路面信息,单片机获得传感器采集的路面信息和车速信息,经过分析后控制智能车的舵机转向,同时对直流电机进行调速,从而实现智能车沿给定的黑线快速平稳的行驶.该文介绍了光电传感器的寻迹原理,讨论了光电传感器排列方法、布局、间隔等对寻迹结果的影响.     

自动寻迹小车的传感器模块设计

介绍利用反射式红外光电传感器实现小车自动寻迹导航的设计与实现以及小车的一种寻迹算法。自动寻迹是智能小车(Smart Car)机器人系统的重要组成部分,其用实现小车自动识别路径。在实验中采用与白色地面色相差很大的黑色线条引导小车按照既定路线前进,系统控制核心采用飞思卡尔的MC9S12DG128B单片机,系统驱动采用控制方式为PWM的直流电机。实验证明此方案可行并且可靠。该技术可以应用于无人驾驶机动车、无人生产线、仓库、服务机器人等领域。     

基于STC89C52单片机的智能小车的设计

主要介绍了一种具有红外遥控、智能寻迹、自动避障等功能的智能小车的设计。本小车采用STC89C52单片机为系统控制核心,单向PWM的直流电机为系统驱动,辅助红外反射式传感器和红外接收器,实现了小车智能寻迹、自动避障和遥控导航,并通过1602液晶显示屏显示信息。     

基于单片机控制的简易自动寻迹小车设计

本文介绍了一种基于单片机控制的简易自动寻迹小车设计,包括小车系统构成软硬件设计方法。该小车以AT89C51为控制核心,利用红外光电传感器对前方障碍物信息及路面信息进行采集,并将障碍物检测信号和路面检测信号反馈给单片机。单片机对采集到的信号予以分析判断,及时控制驱动电机以调整小车转向,从而使小车能够沿着黑色导引带自动行驶,实现小车自动寻迹的目的。该技术可以应用于无人驾驶机动车,无人工厂、仓库、服务机器人等领域。     

基于STC12C5A60S2智能小车控制系统设计

本设计的智能电动小车,由主控模块,超声波传感嚣模块,光电寻迹传感器模块,舵机驱动模块等组成,以STC12C5A60S2单片机为核心,完成路面信息检测、寻迹避障、可程拉行驶速度、准确定位停车等功能这种方案能实现对电动车的运动状态进行实时控制,控制灵活、可靠,精度高。     

基于MSP430智能小车的设计

介绍一种基于MSP430F2274单片机为核心的智能小车。小车采用超声波测距技术实现自动避障,同时通过语音模块来播报出小车与障碍物的距离。为了使测距不受温度影响,用温度传感器实时检测小车周围环境的温度并修正距离计算公式的参数,采用光电编码器来检测小车的速度,运用PID控制算法和PWM来控制小车的精确稳定的运行,从而达到预期的设计目标。     

基于MSP430自动往返小车的设计

设计了一个自动往返和智能控制的小车。采用MSP430F149为核心芯片,选用双全桥驱动芯片作为小车电机驱动,利用PWM技术动态控制电动机的转速,红外线光电传感器检测标识线,U型红外光电传感器测量路程。 MCU判断和处理各种传感器传回的信息,向电机驱动器发出指令,控制小车在往返过程中实现自动加速、限速、减速、刹车、倒车和在液晶显示器上显示行驶时间,行驶路程等相关数据。     

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