基于GSM的通信智能窗设计

系统以STC89C52单片机为控制核心,GSM模块TC35为通信核心部件,加以温湿度传感器DHT11、步进电机、显示屏12864、RS232转TTL电路、步进电机电机驱动电路、LED灯等辅助电路构成。智能窗系统可完成根据温度、湿度自动开关窗并发送短信通知手机当前状态和手机回复短信手动控制开关窗功能。由单片机的串口控制GSM模块收发短信,由单片机的IO口控制步进电机及显示模块。     

基于单片机的智能窗帘的设计

该多功能智能窗帘既具有根据环境光强强度自动对窗帘进行收缩控制,也具有按键对窗帘的收缩进行手动控制功能、定时控制功能以及无线控制功能;多功能智能窗帘控制系统的主控制器是STC89C52单片机,光敏电阻检测环境光强,显示环境光强的模块采用LCD1602,采用步进电机实现窗帘的收缩功能,采用GSM无线模块实现无线控制功能。以实现的功能为基础,结合选择模块对硬件电路和多功能智能窗帘软件进行设计,最后对多功能窗帘进行仿真验证,实现智能窗帘的手动控制,自动控制以及定时控制功能和无线控制功能。     

基于激光二极管的智能循迹小车的硬件设计

介绍了一种基于红外激光二极管的智能循迹模型车硬件系统的设计方法。该系统以MC9S12XS128为控制核心,采用红外激光二极管及红外接收传感器采集路径信息,同时应用内部集成H桥电路的MC33886芯片进行电机驱动,并运用LM331芯片来设计测速电路。此系统可对采集到的路径信息及反馈的车速数据进行分析和处理,能及时控制舵机转向和调整电机转速,从而实现小车的自动循迹功能。     

基于STC12C5A60S2单片机无线蓝牙智能追踪小车

无线蓝牙智能追踪小车是在控制系统的作用下,手机APP软件作为客户端,手机蓝牙作为指令发送方,蓝牙模块作为接收方,然后接收方通过串口仿真协议与控制系统进行通信,从而完成指令的无线传输控制小车前后左右运动。智能追踪是通过红外光电传感器采集信号,反馈给控制系统从而控制电机转动速度实现智能追踪。本设计中,采用STC12C5A60S2单片机作为主控芯片,五对红外光电传感器构成追踪检测电路,蓝牙模块采用HC-06,电机驱动电路及其他外围电路。设计实现了手机无线遥控小车以及沿黑色轨迹行走的智能追踪小车。     

基于89C52单片机的遥控电动小车控制系统设计

遥控电动小车系统以89C52单片机为核心控制器,包含了主控制器模块、电机驱动模块、液晶显示模块、键盘模块、测距模块、蓝牙通信模块、电源模块等。进而设计制作出一台具有自动运行的智能小车控制系统。本系统以两个步进电机作为驱动,通过各类传感器件来采集各类信息,通过2．4GHz蓝牙通信模块实现小车在手持无线遥控器的控制下前进、转向、倒退、小车精确转弯、自动定位等功能。智能小车系统具有很高的灵敏度和精确度,操控简单、便捷。     

基于FPGA的智能小车设计

文中介绍了一种基于FPGA的智能小车设计方案,系统采用FPGA产生的PWM波调控小车速度,红外线传感器TCRT5000检测路面上的黑色轨迹,并将检测到的信号反馈给控制芯片FPGA,FPGA由采集到的信号发出指令,控制小车电机驱动电路以调整行驶方向,从而使小车能够沿着黑色轨迹自动行驶,同时利用了超声波模块实时的检测前边的障碍物,实现了小车的避障循迹功能.     

基于AVR的底片自动定位系统的设计

为了实现底片张数定位以及自动统计、自动片尾检测、底片张数存储的功能,设计了一种基于AVR单片机控制的底片自动定位系统的方案与软硬件实现,分析了该系统的硬件组成和软件程序流程,由键盘／显示模块、光电传感器、电机驱动和电源供电模块组成。测试结果表明,该系统具有结构简单、操作简便、性价比高、体积小、自动化程度高等特点。     

智能公交车报站模拟系统的设计

本文采用步进电机和语音芯片,设计了一款基于51单片机的智能公交报站系统。本系统通过红外光电传感器ST188检测路面黑线和站点,再经由STC12C5A单片机控制智能车左右电机驱动,进而实现小车行止控制;小车停止后,采用语音合成技术(TTS)的语音电路完成自动播报站点信息的功能;系统运行过程中,控制电路将站点信息实时显示在液晶12864上。硬件部分主要包含循迹检测电路,电机驱动电路,语音播报电路,液晶显示电路等,软件部分主要包括小车运行状态判断,电机驱动控制,语音播报程序,以及液晶显示控制。     

基于单片机的煤矿井下水位测控系统

本文设计了一种基于单片机的煤矿井下水位控制系统,其功能是实现水位的实时监测,并将检测到的水位数据快速反馈至用户。系统采用51单片机作为主控器,通过NRF24L01无线通信模块的数据传输方式,结合LCD1602液晶显示器、KS103超声波传感器以及自动进出水模块等一系列元件的组合,完成对水位监测和调控的目的。单片机将检测到的水位信息经过编辑处理后,通过水泵电机驱动电路来控制水位,使其达到正常水平。     

基于单片机的智能控温风扇系统设计

随着单片机技术在风扇系统中的融入,智能风扇逐渐进入人们的日常生活。文章设计实现了一个基于51单片机的多功能智能控温风扇系统。该系统采用DS18B20温度传感器检测环境温度,主要模块包括主控模块、电源电路、MCU控制模块、温度采集模块、无线遥控模块、电机模块和数码管显示模块。经过测试,该系统能检测电风扇周围环境温度并且根据用户设定的调温模式自动进入识别模式。若是自动调温模式,系统则会控制电风扇转速并根据温度的变化做出相应的调整。     

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.     

Nanoimprint Lithography -A Next Generation High Volume Lithography Technique

IntroductionNanoimprint Lithography is a well-acknowl-edged low cost, high resolution, large area pattern-ing process. It includes the most promising methods,high-pressure hot embossing lithography (HEL) [2],UV-cured imprinting (UV-NIL) [3] and micro contactprinting (m-CP, MCP) [4]. Curing of the imprintedstructures is either done by subsequent UV-lightexposure in the case of UV-NIL or by cooling downbelow the glass transition temperature of the ther-moplastic material in case of HEL…     

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.     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

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.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

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.