基于GSM的无线智能家电控制系统设计

该设计主要采用单片机系统模块和GSM手机模块来实现,GSM手机模块发送和接收用户手机的短消息,实现对家用电器电源的通断控制以及电器工作状态的查询与监测。     

基于虚拟串口的GPS／GSM远程定位技术

为了以较少的资源解决远程目标定位数据传输的空闻局限性,提出一种基于虚拟串口的GPS/GSM远程定位技术,并将其实现.该技术将GPS技术与GSM短消息业务相结合,以AT89S52单片机为核心构成控制单元.利用虚拟串口实现单片机与GSM模块通讯,巧妙地克服了AT89S52单片机只有一个串口的问题.利用GSM短消息作为定位数据的传输手段,在监控中心的PC机上编写监控软件就可以得到远程目标的定位信息,并可以结合电子地图直观地显示出远程目标的位置.经过长期测试,该技术稳定可靠、定位精度较高,可用于多种远程定位监控系统中.     

水质监测中基于GSM短消息的应用

针对水质在线监测系统的预警系统的设计,提出了基于GSM短消息的解决方法,即GSM无线LED显示控制卡.系统是由单片机作为中控制器,对GSM短消息进行接收控制,通过远端LED进行显示.在系统的硬件设计中,给出了各个功能模块包括:系统供电电源、时钟电路、无线数据收发模块、数据存储器的扩展、LED显示及扫描驱动模块等具体设计...     

利用TC35i和PC机实现短消息的收发

介绍了西门子的GSM无线通信模块TC35i,并提出了由TC35i模块通过搭建外围电路构成一个GSM Modem,PC机通过串口数据线向其发送AT指令,从而实现短消息的发送和接收。详细介绍了TC35i的外围电路设计,给出了实际的电路连接图,并介绍了通过PC机给TC35i写AT指令从而实现收发短消息的过程。     

基于GSM短消息模式的生理参数远程传输

随着移动通讯技术的发展,GSM短消息技术已运用在许多监控系统中.本文基于西门子公司的TC35i模块,采用GSM短消息的方式,对测量到的人体生理参数进行远程的传输.根据TC35i模块的工作方式,设计出接口电路,利用串口对GSM模块进行控制,利用AT指令完成对GSM模块的软件编程,实现短消息无线传输的功能.     

一种无线数据采集及远程监测系统的设计

介绍一种以C8051F020单片机为微控制器的环境参数采集及远程监测系统.包括其硬件结构及软件流程的设计.系统通过微控制器控制无线模块PTR8000实现数据的无线收发,从而完成数据的采集、存储;并可以通过由TC35i构成的GSM MODEM实现GSM短消息的报警和远程监测.系统结构简单,成本低,功耗低,适用于对野外或其他不便于铺设线缆的地区进行数据采集及远程监测.     

基于单片机和GPRS的配电变压器远程监测系统设计

介绍了一种基于C8051F020单片机和MC52i无线通信模块构建的密电变压器远程监测系统,采用单片机实现多通道数据采集,完成帧结构定制,并通过串口实现GPRS模块的控制和信息收发。     

基于单片机的GSM短信收发模块设计

本设计研究如何通过单片机的控制,实现GSM模块接收和发送简单数字、字母的短信。随着科技的发展,GPS和GSM的联合定位装置将给人们带来更大地方便,如何控制GSM模块将接收到的定位数据发送和回收,对后续的数据处理有至关重要的作用。本文使用MSP430单片机通过RS232串口与GsM模块通信,使用标准的AT命令来控制GsM模块实现各种无线通信功能。实验结果表明：该模块能够稳定的将定位数据以短信的方式进行传输。     

水产养殖物联网监控系统的设计

针对蓝色经济区水产养殖粗放式管理现状,设计了新型水产养殖物联网监控系统。该系统的传感器节点负责水质数据采集功能,并通过Zigbee无线传感器网络将数据发送给汇聚节点,汇聚节点通过GPRS模块接入Internet网络,将数据传送至远程监控中心。同时监控中心设置的各项参数通过Internet和汇聚节点传到采用PIC单片机的控制节点,实现水质的自动控制。监测中心软件采用C＋＋ Builder开发,为用户提供形象直观的实时数据监测平台。经过在日照市某水产养殖基地的试用,系统性能满足水产养殖水质监控的应用要求。     

GSM短消息在雨量RTU系统中的实现

要想实现雨量RTU系统的通信功能,首先要实现系统通信模块的通信功能,因此系统中通信模块的设计和功能实现是系统的关键部分。针对这一要求,围绕SIM900A芯片和有效SIM电话卡完成系统通信模块的硬件设计,软件方面使用AT指令集以GSM和GPRS通信方式通过串口调试工具实现系统的通信功能,本文主要介绍GSM短消息方式实现系统的通信功能。通过实验证明,虽然GSM短消息具有短消息长度受限和存在延时的缺陷,但是本文设计的雨量RTU系统通信的成功率和实时性可以达到实际应用的需要,符合设计的要求。     

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.     

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.     

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.     

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.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first     

JOURNAL OF ELECTRONICS(CHINA)

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NEXT GENERATION WIRELESS NETWORKS–ESPECIALLY THE USE OF MILLI-MICROWAVE BANDS

The global bandwidth shortage of wireless communications has motivated the exploration of the naillimeter wave （ram-wave） frequency spectrum for the next generation wireless communications. Recent advances in RF CMOS technology and high speed baseband signal processing technologies have enabled tile extensive research and development of turn-wave wireless communications. The multi gigabit per second data rate of ram-wave system will lead to applications in many important scenarios, such as WPAN, WLAN,back-haul for cellular system. And the frequency bands include 28 GHz, 38 GHz, 45GHz, 60GHz, E-BAND and even beyond 100 GHz. The propagation and the imitation of the RF circuits design in these frequency bands make the directional antennas be inevitable for mm-wave communications.