基于TMS320LF2407A的教育机器人硬件系统设计

本论文的主要目的就是设计一种基于DSP的模块化教育机器人硬件系统。该教育机器人是以智能小车为载体基于TMS320LF2407A微控制器的嵌入式控制平台及编程环境的一款开放式的机器人控制系统,以各传感器模块设计应用为核心,采用模块化设计思想进行设计,包括系统总体框架的设计、无线通信模块和系统电源、电机驱动硬件电路模块的设计。     

一种基于DSP的移动机器人运动控制器设计

分析了运动控制器对机器人的重要性;提出了一种高性能的基于DSP芯片的运动控制器的整体设计方案,该控制器集控制电路、数据采集模块和驱动电路于一体,能够很好的完成机器人运动轨迹和位置的控制。设计了控制器的硬件电路,重点介绍了驱动电路和电源电路的设计过程。最后,为了实现控制要求,对软件进行了相应的设计。     

基于实时系统的CAN节点系统设计

针对CAN总线通讯技术的特点,本文设计了一种满足高可靠性要求的CAN网络节点系统。该CAN节点基于FPGA平台,由带CAN总线控制器的微处理器、CAN总线驱动电路、扩展接口电路组成,主控单元电路全部集成在单芯片中;本文不仅完成硬件电路设计,还引入了实时多任务操作系统μC/OS-Ⅱ平台,并基于该系统开发CAN节点功能应用。整个完整电路以及软件代码都在FPGA平台上完成了系统仿真以及功能验证,并最终通过节点功能验证板完成CAN节点实际系统测试。实际运行结果证明该节点系统硬件功能正常,软件系统有效可靠。     

基于MSP430F2234微型机器人无线控制系统

介绍一种基于MSP430F2234单片机的微型机器人无线控制系统.控制系统主要由PC机工作站、MSP430F2234单片机、nRF24L01无线收发电路和微型步进电机驱动电路组成.设计完成微型机器人无线控制系统硬件电路以及各个部分的软件.实验表明,微型机器人无线控制系统具有很好的稳定性、快速性和准确性.     

基于ATmega128和FPGA的六自由度机器人的直流伺服控制器设计

具体介绍了基于ATmega128单片机控制系统硬件,设计了基于ATmega128和FPGA硬件体系结构的多直流电机的伺服控制硬件系统,包括6路PWM驱动电路和基于FPGA的6路正交编码器接口及大量I/O接口电路,并通过数据地址总线进行数据交换.设计了基于uC/OSII实时操作系统的控制软件,实现了对六自由度机器人各个关节的速度和位置的双闭环数字PID控制,并在实验中取得了较好的控制效果,关节定位精度达到0.01o,采样周期可以达到5ms,可以满足20Hz响应带宽的控制要求.     

基于CMOS图像传感器的高速小型化成像系统设计

基于LUPA1300-2型CMOS图像传感器设计了一套高速、高分辨率、小型化,低功耗的成像系统。以FPGA作为系统的时序控制程序开发平台,采用Verilog硬件描述语言设计了传感器驱动、数据处理、通信和数据传输等模块程序,并对各模块的功能与结构进行了分析和说明。基于本文提出的成像系统框架开发了硬件电路,然后对整个系统进行了成像实验。结果表明,该成像系统驱动时序合理,与计算机通信正常,数据传输准确,图像质量高,系统运行稳定。     

轮式机器人控制系统设计

设计了一套基于直流电机的轮式机器人大功率驱动控制系统。本系统采用双H桥结构驱动两个电机,并以AVR单片机Atmega168为处理器实现电机控制。通过单片机定时器的快速PWM(脉宽调制)模式输出不同占空比的PWM信号,送给H桥,从而控制电机的转速。本系统以DXP2004为平台设计了电路原理图和大功率PCB(印刷电路板),并使用AVR Studio和WinAVR工具配合开发单片机程序,电路实测达到10 A以上驱动电流。     

基于DDS技术的动态偏振控制器驱动电路研究

偏振控制器广泛应用于光纤通信和传感领域,研制具有高性价比的偏振控制器配套驱动电路是必要的.运用邦加球图示法,分析光纤挤压型动态偏振控制器(DPC)的工作原理.以某种偏振度(DOP)测试系统的硬件为实验平台,介绍基于直接数字频率合成(DDS)技术和FPGA的动态偏振控制器驱动电路的工作原理、系统结构及软、硬件设计.实验测试结果表明,该设计实现了驱动电路的预期目标,产生了4路具有频率可调,相位噪声低等优点的正弦驱动信号.该驱动电路与传统实现方式相比,具有输出信号稳定,控制灵活,实用性和性价比高等优点.     

码垛机器人腰关节电机驱动系统设计研究

本文以DSP技术为依托,利用电动机、减速器等硬件,设计出了驱动板与控制板电路,开发了系统的控制程序,以此得到一款全新的码垛机器人腰关节电机驱动系统,最后,通过仿真模拟分析的方式,对该驱动系统的实际应用效果进行了验证。通过验证可以发现,该驱动系统性能良好,可将其应用到实际当中。     

实验室清洁机器人控制系统设计

提出了一种基于单片机系统的实验室清洁机器人控制系统的设计,并设计出一个以AT89C52单片机最小系统为控制核心,加以直流电机、各类传感器、各硬件电路构成,工作模块主要分驱动模块、避障模块、通讯模块、清洁模块、工作机构升降装置和供水系统等。该控制系统的工作功能完备,工作性能良好。     

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.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

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.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.