基于STC单片机的温度调控系统设计

主要是对以STC单片机为主控制单元和以温度测量单元构成的单总线数字温度传感器DS18B20进行研究。该系统可以设定温度上、下限,并显示检测温度,监测实时数据。如果温度超过设定的上限或下限温度,报警系统将依照事先设置的参数来实现自动控制,达到一定范围内温度的监测与控制。     

基于SPI接口的温度测量系统

设计了基于SPI接口的温度测量系统,采用ATmega16单片机控制,TC72温度传感器采集温度,以及1602液晶屏进行数据显示。系统主要由温度传感器电路、LCD液晶显示模块电路、矩阵式键盘电路、报警电路和ATmega16单片机控制电路5个模块组成。ATmega16单片机根据TC72温度传感器检测到的温度,经一定的控制算法给出控制信号,通过LCD显示出检测温度的大小;矩阵键盘可以设定上限和下限温度,当实时温度超出设定范围时,报警电路会发出警报,达到温度测量和控制的目的。     

基于单片机的智能浇花系统设计

本系统采用主控芯片STC89C51,配合灵敏度极高的湿度传感器DHT11、温度传感器DS18B20、光照强度传感器BH1750FVI组成系统的最重要部分.12864液晶显示模块可以显示当前实时的湿度、温度、光照强度,让用户很好的掌握各种植物的生长数据.执行机构是由继电器和水泵组成,还有比较严谨的三色指示灯和蜂鸣器报警模块.在软件设置湿度上限和下限,当湿度传感器检测当前实时湿度达到下限时,便会告知CPU将控制信号给到执行机构,继电器闭合水泵电机工作,开始进行浇水,反之,当达到上限时继电器会断电水泵停止浇水工作.这样的一个智能浇花系统可以帮助用户简便、轻松的照顾好自己的盆栽,让植物很好的生长,对现实生活具有实用意义.     

基于LabVIEW的单通道温度监测系统设计

为实现温度的适时监测和超限报警,文中利用LabVIEW图像化软件对单通道温度监测系统进行了设计开发。通过软件设计和硬件实验,该系统具有温度数据实时显示及自动存储、超限报警等功能。实验结果表明,所设计的温度监测系统具有采集时间短、温度阈值设置灵活等特点,可广泛应用于不同领域。     

基于LabVIEW的温度采集报警系统

温度作为一种物理参量,是工业生产中最普遍最重要的参数之一.为了能灵活地对温度进行测量,同时可以方便地改变控制范围的参数、增加可调节性,提出了本设计.本设计以LabVIEW软件为工具,在分析系统功能需求的基础上,介绍了包括前面板、流程图以及图标/连结器在内的虚拟温度采集报警系统的设计,同时介绍了数据采集的理论及虚拟仪器(VI)设计的相关技术,并给出了本系统的仿真结果.经仿真,本温度采集报警系统能很好地实现温度数据的采集,显示以及上下限的报警,并可以灵活地在0℃至100℃之间设定上下限报警温度,达到了设计的目的.     

基于单片机与PC机的温度监测系统设计

设计了基于单片机和PC机的温度监测系统,温度传感器采用DS18B20。下位机采用AT89S52单片机,可以显示温度和超限报警。PC机作为上位机设定上下限报警温度,接收单片机的温度数据,处理后实时显示温度和绘制温度曲线,还实现了超限报警和保存数据功能。上位机利用Matlab强大的数值计算、图形显示和串口操作功能,具有友好人机交互界面,实现了温度动态监测。     

基于Zigbee技术的温度监测报警系统设计

基于嵌入式WinCE6．0操作系统和Zigbee模块设计了无线温度监测报警系统。该系统利用温度传感器采集温度数据并通过无线网络协调器与嵌入式实验箱进行实时通信,最终显示实时温度并在超过设定温度值时给予短信报警。该系统通过改变不同的传感器可以用于各行各业,应用范围板广。     

基于Zigbee技术的温度监测报警系统设计

基于嵌入式WinCE6.0操作系统和Zigbee模块设计了无线温度监测报警系统。该系统利用温度传感器采集温度数据并通过无线网络协调器与嵌入式实验箱进行实时通信,最终显示实时温度并在超过设定温度值时给予短信报警。该系统通过改变不同的传感器可以用于各行各业,应用范围极广。     

基于单片机的超声波汽车报警系统的设计

介绍了一种基于单片机与超声波结合的倒车报警系统的设计过程,本系统采用NE555和CX20106A构建超声波发射与接收电路,通过单片机与数码管实现测距计算与实时显示,同时用户还可以通过按键设置倒车报警距离,当达到设定的报警距离时系统将进行语音报警。另外系统设置了分段指示灯(倒车安全、注意倒车、倒车危险),提高了倒车安全系数。经测试,该系统在10～250 cm范围内能实现准确测距,且通过数码管实时显示倒车距离,并进行声光报警。本系统弥补了中、低端汽车报警系统不能实现准确测距和实时显示倒车距离的问题,具有集成度高、测量范围广、成本低等特点,能满足驾驶员在实际倒车中的需求,具有一定的理论和实用价值。     

热镀锌工艺中助镀剂温度监控系统设计

为了实现热镀锌工艺中,对助镀剂温度的实时监测和控制,设计了一种基于单片机的温度监控系统。系统以AT89S52单片机为控制核心,利用新型一线制温度传感器DS18820测量温度值,用液晶显示器LCD1602显示并实现助镀剂温度的监控和报警处理。根据工程需要设定测温范围为60-70℃,测量精度为0．5℃。用户可以自定义报警上、下限,一旦温度超过极限值,单片机便启动蜂鸣器报警及继电器执行电路。实践证明该系统精度高、报警及时、工作稳定、成本低,有较好的实用价值。     

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.