基于GSM的分布式监测系统设计

基于GSM的分布式监测系统,就是各个监测节点的单片机控制GSM模块将数据采集模块采集到的数据以短消息的方式发送到监测中心。将短消息业务和数据传输结合起来,实现了监测节点的数据采集和通讯功能,实现了监测中心通过串口接收并解析来自GSM模块的短消息的功能。其中,单片机通过串口实现对GSM模块的控制,GSM模块通过AT命令收发短信。计算机通过串口和GSM模块连接组成了监测中心,监测中心接收来自监测节点的短消息,实现监测目的。     

火电厂大型旋转机械振动监测系统中PROFIBUS从站设计

针对现有火电厂大型旋转机械振动检测系统的缺点和未来发展趋势,使用通信模块集成芯片SPC3,利用PROFIBUS协议实现了旋转机械振动监测系统中的网络模块,设计了Profibus-DP从站,使系统中众多监测模块组成网络,实现整个监测系统的网络化与数字化。     

基于GPRS的小型机电设备无线监测模块设计

为实现小型机电设备的无线监测需求,提出了一种基于GPRS传输协议的小型机电设备无线监测模块设计方案,并完成其软硬件设计。该模块硬件部分采用stm32单片机、SIM900模块实现,软件部分采用MDK进行编程,能够实现对采用S7-200 PLC作为主控器的小型机电装备的状态参数进行监测。该监测模块具有成本低、稳定性好、应用广泛的特点。     

基于FPGA的宽频谱信号监测系统设计

以软件无线电数字中频接收理论为依据,利用FPGA实现了宽频域无线信号监测的系统设计。本课题主要完成数字中频接收,并将处理后的频谱、信号及监测信息上传至DSP进行解调,利用Simulink实现系统建模仿真;利用Verilog HDL实现各个数据通路模块,包括NCO模块、FIR滤波器模块和FFT模块等;搭建硬件平台,通过FPGA进行系统设计实现。整个系统监测频率范围从500 kHz⁶ GHz,输出信号的信噪比达到50 dB以上,实现了对无线宽频谱信号的监测,达到了设计要求。     

基于TCP／IP的光功率监测模块的设计与实现

介绍了光功率监测模块的原理,阐述了TCP／IP技术在光功率监测模块（OPM）中的作用以及采用此类技术对监测模块的意义,并给出在实际研发过程中用Socket实现TCP／IP通信的一个例子。     

基于SIM300的煤矿监测监控系统

提出了以SIM300 GSM通信模块结合CAN总线技术实现煤矿无线监测监控系统的技术方案,阐述了系统的实现方法、硬件结构、各模块及软件运行方式.该系统利用CAN总线网络采集各节点传感器测量信息,并通过GSM无线通信模块实现煤矿远程监测监控运行情况.     

网络监测系统中SIP监测模块的研究与实现

为了对实现对NGN网络的建设和优化,需要一种对网络中传输的信令消息进行分析的监测系统。本文以方案思想—设计实现—结果分析为线索,首先对监测系统设计思想进行研究,然后对信令测试仪中SIP监测模块进行了详细分析。在分析SIP协议消息结构的基础上,提出了SIP协议监测的方案,并给出了SIP类的定义体和SIP协议消息解码模块流程图。在SIP解码的基础上对监测模块中最重要的CDR合成模块进行了讨论,通过实际工程测试给出合成CDR结果,从而验证了监测系统方案的可行性与可靠性。     

基于传感视觉智能化的工业污水监测系统设计

工业污水的现场监测环境复杂,常规方法不能对污水情况进行及时、自主监测,因此构建了基于传感视觉智能化的工业污水监测系统,对提高污水处理质量具有重要作用。该系统包括现场智能化视觉监控模块、管理服务器以及数据库服务器。智能化视觉监控模块通过图像采集模块、目标检测模块、视频录像模块和污水跟踪模块对工业污水进行实时监测。结合视觉污水泄漏点检测算法,控制智能视觉监控模块,实现对工业污水泄露情况的监测。实验结果表明,采用所设计的系统监测工业污水,能够清晰地反应污水泄漏图像,提高污水监测精度,具有较好的实用性。     

基于GPRS技术的城市灯光智能监测终端

基于GPRS的城市灯光智能监测终端,采用ARM7微处理器及GPRS模块实现监测终端与GPRS网络之间的通信。监测终端将采集模块采集的电力参数、开关量和报警信息通过GPRS模块传输给监控中心,实现实时监控。远程监测终端通过GPRS网络和Internet连接,建立通信信道,进行数据传输。     

石油管道监测系统的研究与设计

结合石油管道在实际应用中存在的问题,通过分析常用的石油管道监测技术,研究和设计了一种石油管道监测系统.论述了石油管道监测系统的3种功能,即管道泄漏监测功能、管道变形监测功能、管道视频监测功能.设计了硬件系统总体结构,包括服务器(主控系统)、客户终端、通信网络、传感器,以及软件系统总体结构,包括数据采集模块、数据库服务器模块、监测与定位模块、通信接口模块、人机界面模块和客户端模块.通过建立石油管道监测系统,能够实现全自动的监测报警与定位,保证了石油管道的正常运行.     

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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NOTICE OF CHANGING JOURNAL OF ELECTRONICS （CHINA） TO MICROSYSTEMS ＆ NANOENGINEERING

正Journal of Electronics(China)(JE)was founded in 1984,sponsored by the Institute of Electronics,Chinese Academy of Sciences.JE is one of the first English academic journals in China in the field of Electronics and Information technology.The journal was published quarterly since it was launched in 1984 to 2003,then it is published bimonthly till now.During