基于单片机的太阳能人数统计系统设计

设计了一款基于AT89S52单片机的人数统计系统,介绍了该系统的工作原理和设计方法。该系统以太阳能作为供电能源,以对射式红外组成系统检测电路,单片机对进出人数做统计,结果通过数码管显示。实验测试证明,设计的样机系统实现了人数的实时监测和显示功能,可靠性高且达到了良好的效果,可广泛用于各大高校教室、实验室管理系统以及银行、售票厅等公共场所。     

基于红外光通信电路的设计与制作

本文使用集成运放TDA2822M、红外对管作为收发器件,设计并制作出了红外载波发射电路和接收电路,实现了有限距离的红外光通信。该装置能够实现在3.0m距离范围内,接收端可接收不失真的音频信号,同时,通过监测电路可实时监测到发射端和接收端的信号情况,便于将电路调整到最佳运行状态。     

一种简易红外通信装置的设计与实现

设计了一种简易数字控制红外通信装置,系统硬件部分由红外发射电路、红外接收电路和中转电路三部分组成。系统以STM32F051C4为控制核心,以红外线为载体,采用PWM调制技术、曼彻斯特编码方式,实现了语音和温度信号的实时传输。在保证系统稳定性的同时,通过采用低功耗器件、有效控制发射脉冲占空比等措施,提高中转节点的效率。系统完成硬件电路和软件程序后,经过实验测试,在输入800Hz的正弦信号,接收装置的输出电压有效值不低于0.4V时,红外光发射电路与红外光接收电路之间的传输距离最大为4m;在减小发射端输入信号的幅度至0V时,接收装置输出的噪声电压小于40mV;电路最大供电电流不超过20mA。     

红外图像增强在CPLD中的实时实现技术

CPLD（复杂可编程逻辑器件）可用来实时并行处理海量图像数据。本文以具有代表性的图像帧积分、直方图拉伸、模板滤波等算法为例,在介绍算法原理的基础上,叙述了红外图像增强算法在复杂可编程逻辑器件CPLD中的实时实现技术。     

基于FPGA的红外遥控彩灯控制器的设计

设计一种基于现场可编程逻辑器件FPGA的红外遥控彩灯多模式显示控制系统。具有成本低、性能可靠、扩展性好等优点。详细介绍了系统的电路结构,提出一种由SC9148B红外发射芯片及外围电路作为发送器,HS0038B红外一体化芯片作为接收器,FPGA作为核心控制器的红外遥控系统的构建方法。该系统通过时序仿真与FPGA逻辑验证,结果表明,该设计能很好地实现彩灯红外遥控信号的解码控制、键值信号存储及译码、彩灯多模式显示等功能。     

基于光电检测的红外光信号接收电路设计

由于红外器件的广泛应用,红外光信号的检测受到许多学者的关注。为解决红外光信号容易受到太阳光干扰的问题,在光电检测原理的基础上,根据红外光信号和噪声的特点,设计了红外光信号检测的前置调理电路。将微弱的光信号通过光敏三极管转换成电信号,并通过放大、滤波等处理,滤除了部分高频和低频噪声,使转换后的电信号放大到适合后续电路处理的幅度范围内。试验结果表明,该检测电路可以满足一般场合的红外光信号的检测,输出电压的幅度可以由毫伏级放大到几伏,能够滤除太阳光中高频和低频分量。     

基于红外检测的产品自动分装系统设计

设计了基于红外检测的产品自动分装系统。采用红外传感器与基于NE567的单音解码电路组成红外检测电路以提高系统检测灵敏度,增强检测系统的抗干扰能力。利用NE567中CCO的输出信号控制红外发射电路的发射频率,实现了红外收发频率的自动同步跟踪,同时简化了红外检测电路,使电路更易调试。通过编程实现二进制与BCD码之间的码制转换,利用可编程软元件完成产品分装计数功能,同时为显示电路提供时钟脉冲,使系统显示电路大大简化。该系统灵敏度高,抗干扰能力强,能精确完成产品分装,能显示瓶装片数(0～999),及实时显示工作进程(0～9 999)。     

基于单片机原理的实验室智能控制系统研究

为了方便教师实时了解实验室（教室）人数,采用STC89C52单片机设计了实验室智能控制系统。该系统智能地控制实验室中各种电源的使用情况,可实现以下功能：通过中断方式使用红外光电开关实时采集实验室人数并根据人数控制实验室中灯和实验桌的电源,通过电脑控制实验室电源的使用情况;并采用2次定时刷新闹钟定时的方式和时钟芯片与单片机内部定时器混合控制方式,使得到达放学时间自动播放音乐,延时关闭电源,同时能显示实验室温度,可通过电脑查询实验室人数等。该系统现已完成,实验表明达到了预期效果。     

JB5型红外光刻机

<正>概述 红外光刻机是一种特殊用途的光刻机,其特点是通过红外显微镜来观察样片反面图形,从而可以样片反面与掩膜套刻,即实现背面光刻工艺。利用这种工艺可提高器件的性能,如FET器件的源区面接地工艺,减少了器件的源区电感值,使器件增益提高,红外光刻机广泛用于砷化镓、锢砷磷,硅等材料光刻,是生产微波FET器件,光电器件和其它器件的重要工艺设备。JB5型红外光刻机的电控系统包括红外显微镜高压聚焦电路、红外光源电路、主控回路、高精度数显计时器及曝光光源的恒光强控制电路等。 红外显微镜成象原理及其高压聚焦与光源电路     

红外焦平面阵列实时成像软件设计

红外焦平面阵列是将探测到的热辐射信号转换为电信号,最终形成热像的一种红外传感器件,它是红外凝视成像的核心器件。本文通过LabVIEW软件编程实现对256×256 InSb红外焦平面阵列信号的实时成像显示,并对其红外图像特性进行简要分析。结果显示该系统能准确的采集红外图像信号,并可以进行实时成像处理。     

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.