GSM汽车防盗报警系统

介绍了如何以AT89C52单片机作为控制核心控制GSM模块,实现发送短信、拨打报警电话的汽车防盗报警系统.该系统使用人体红外传感器探测报警信号,当红外传感器接收到报警信号时,单片机通过向GSM模块发送AT指令控制GSM模块发送报警短信或拨打报警电话.本汽车防盗系统利用GSM手机网络对汽车进行24小时无距离全方位监控,当汽车出现警情时,立即发送报警短信并拔打电话报告车主.GSM技术打破了传统汽车防盗系统的范围瓶颈,实践证明该系统稳定可靠.     

基于热释电红外传感器防盗系统的设计

利用热释电红外传感器的红外辐射与红外探测的原理,设计了一种基于红外传感器无线遥控家庭防盗系统,该系统包括无线语音发射和接收模块、信号采集与信号处理模块、信号输出和报警模块组成,当非法人员进入后,红外传感器接收红外辐射能转换成为电信号,经经放大滤波、A/D转换输入单片机,经单片机加工处理,驱动报警装置并利用无线发射语音电路向用户发射报警信号从而达到防盗的目的,基于热释电红外传感器的家庭防盗报警系统,抗干扰能力强、灵敏度比较高、使用方便、实用性强,具有较好的应用价值.     

基于单片机和GSM模块的红外探测远程报警系统

GSM网络作为无线智能监控系统的信息传输平台是一种很有效的方法,本文介绍了一个基于单片机、GSM网络收发技术和热释电红外传感器的红外报警器,这个对人们的住宅安全防护智能化的发展,满足人们对居住安全的强烈要求方面有一定的实际意义。本设计利用STC89C52单片机为控制器,SIM300作为无线通信模块,红外传感器作为监控单元,单片机和SIM300通过串口进行通讯。如果监控单元探测到有人闯入,作为信号产生的红外探测器发出一个信号,初始的热释电红外传感器信号经过滤波技术消除噪声从而平滑和变为一个方波信号,通过这个方波信号的作用,STC89C52能够控制SIM300模块发送短消息给用户报警。     

基于单片机汽车防盗报警系统设计与实现

介绍了一种新型的汽车防盗报警系统,以单片机为主控制模块,采用防震传感器以采集外部震动信号,利用声光报警模块发出声光报警,采用移动电话GSM拨打车主电话或给车主发短信,使用无线遥控模块可实现远程遥控开启与关闭系统。试验表明该系统可以实现在0~70 m开阔空地的远程准确的开启与关闭报警功能。     

基于单片机和GSM的火灾报警器设计

系统主要由单片机为核心的控制模块、温度和烟雾检测模块、A/D转换模块、声光报警和GSM远程报警模块等部分组成。系统利用AD509温度传感器和TGS202烟雾传感器对周围环境进行监测,通过声光报警和GSM远程报警系统实现火灾的定点和远程报警。系统可用在仓库、车站、家庭等场所,用于火灾的防治和报警。     

一种基于SIM800C通信模块的远程防盗报警器设计

传统的防盗门、防盗网存在诸多缺陷,为了降低财产失窃的风险,加强对单位和家庭财产的保护,设计了一种能够进行远程防盗的报警器,系统以STM32F103C8T6单片机为主控核心,通过热释电红外传感器进行信号采集,SIM800C作为GSM通信模块,蜂鸣器作为报警模块。热释电红外传感器如果检测到有人靠近,则发出信号并传送到单片机进行处理,蜂鸣报警器接收到单片机处理的信号后及时启动。当盗窃发生时,用户手机可以接收到SIM800C模块远程的警报信息,提示用户设备可能失窃。测试表明,该远程防盗报警器灵敏度高、成本低,有较高的性价比,可有效降低用户财产失窃风险。     

智能家用燃气泄漏监测报警系统设计

本系统设计以STM32单片机为控制核心,通过Wi Fi模块将采集到的传感器数据上传到上位机,通过GSM模块进行远程报警。上位机使用Lab VIEW进行设计,能实时监测显示相关传感器检测数据。通过按键控制电路或Lab VIEW界面可以设置燃气浓度、管道压力的阈值。气体传感器实时检测空气中的燃气浓度,压力传感器实时监测管道的燃气压力,当实际检测到的燃气浓度大于燃气浓度安全阈值时,或者管道压力值出现异常时,驱动风扇模块进行通风处理,降低燃气浓度值,紧急切断燃气电磁阀,现场声光报警,同时通过GSM模块进行远程报警提醒。经调试和测试,最终实现了系统的功能。     

基于物联网的家居燃气报警系统开发

在燃气带来生活便利的同时,也给我们的家居生活带来了不少的安全隐患。针对此种安全隐患设计了一种基于物联网的家居燃气报警系统。该系统采用STM32F103为主控制器,利用气体传感器采集室内CH4、CO2等气体的浓度值,经ADC转换模块转换为数字信号送入STM32F103,经过STM32F103进行处理后,在LCD上显示气体浓度,如果被监测的有害气体浓度超过安全值,则启动排气扇,进行声光报警,系统可将报警信息通过GSM网络发送给家庭成员。经测试,该系统能有效地进行家居燃气的检测和报警。     

基于STM32单片机的机房环境检测报警系统的设计与实现

广播电视行业设备机房里的设备种类、数目繁多,为了保证设备的正常运行,提出一种基于STM32单片机的机房环境检测报警系统设计方法。系统可检测的项目包括不间断电源(Uninterrupted Power Supply,UPS)故障、精密空调漏水以及环境温度等。当UPS出现故障,会输出一个GPI信号,STM32单片机检测这些GPI信号来控制语音模块进行语音报警。系统利用浸水传感器来检测空调是否漏水,通过温度传感器来检测机房环境温度。STM32单片机处理采集到的信号,如果信号有异常就触发语音和声光报警。该系统能够有效减少机房安全事故的发生,具有重要的应用和推广价值。     

基于物联网的智能家居系统设计

随着智能家居系统的普及,人们对智能家居的接受程度越来越高。文章结合物联网和单片机技术,设计了一款基于STM32的智能家居系统。该智能家居系统由单片机模块、温湿度检测模块、烟雾检测模块、按键模块、无线模块、显示模块和报警模块构成。其中,温湿度检测模块采用DHT11温湿度传感器,负责对家庭内部的温湿度指标进行监控,烟雾检测模块采用MQ-2对烟雾浓度进行检测,并将检测到的所有数据上传给STM32单片机。单片机模块接收到传感器采集的温湿度和烟雾数据后,通过显示模块将采集到的数据实时展示给用户,并采用Zig Bee无线通信技术把数据上报给上位机,上位机根据数据阈值实现报警功能。最后经过实验,文章设计的智能家居控制装置可以准确实现各项环境数据指标的检测与无线传输的功能。     

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.