基于单片机的LED路灯模拟控制系统的设计与实现

为了能对LED路灯系统进行节能、智能控制方面的研究,设计和实现了以AT89S52单片机为控制核心的LED路灯模拟控制系统。系统以单片机为控制核心,对由两个1WLED路灯构成的模拟路灯装置实现多种路灯系统模式的控制。系统由液晶显示屏LCM1602显示控制操作界面,能自动实现故障检测与报警,通过按键进行路灯系统模式选择、功率输出调节等智能操作,实现了对模拟LED路灯的智能检测和控制。     

基于无线模块NRF905的节能路灯控制系统设计

对基于无线模块NRF905的节能路灯控制系统的硬件电路与软件设计进行了详细论述。本系统设计能够根据环境的明暗变化、物体的动态移动来实现对LED节能路灯的定时开、关及故障报警等自动控制。其控制过程:总控制器和支路电路单片机之间通过NRF905(无线收发器)进行指令的接收与发送,总控电路实现对系统开关的定时,也可对单元电路进行单独定时,还可以根据光敏电阻对白天黑夜光线的感应来控制系统的开关,实现自动开、关灯。在支路电路中,用LM358集成运放来构成恒流源控制LED灯光的变化。通过光敏电阻对LED灯亮灭的感应检测,当支路电路发生故障灯灭时,发送相应的指令到主控制器来进行故障报警。当深夜人少时,利用红外传感器光电开关来判断行驶物体的范围来实现对LED开关状态的控制,以达到节能的目的。     

无线智能控制LED路灯系统的设计

随着社会生活和工业生产对环境保护、节约能源等的需求越来越多,LED路灯得到了越来越广泛的应用。本系统以MSP430F5438A单片机为调节核心,以LY-BL001无线蓝牙传输模块作为通信核心,由Buck变换器及其驱动电路、电压电流检测和报警等模块组成,建立了无线智能控制LED路灯系统。系统实现了光强检测、报警、过欠压闭锁等功能;无线智能控制LED路灯系统能够与Android手机进行信息交互,实现远程无线操作。     

基于单片机控制的太阳能LED智能路灯照明系统

系统本着充分利用太阳能供电,并且实现路灯照明系统的智能化为目的,以AT89S51单片机为控制核心,自行设计了一套太阳能LED路灯智能照明系统。在该系统中以单片机与模数转换器构成数据采样模块,实现蓄电池的过充与过放保护电路;数码管显示电路显示蓄电池的电压和当前时间;通过光敏电阻感知外界环境亮度,实现LED路灯的开启与关闭;无线模块实现对LED路灯人为的控制。实验结果表明该系统性能稳定、实时性高、节能、智能,具有良好的应用前景。     

基于无线链式网设计的路灯控制系统

该路灯控制系统采用无线单片机CC1110为控制核心,采用无线链式网对分散路灯进行网络控制.系统功能包括功率控制、温度检测、故障报警、工作时间统计等.     

一种应用LoRa通信的LED路灯智能控制系统设计

本文设计一种基于LoRa通信的LED路灯智能控制系统,该系统由LED路灯、集中控制器(LoRa网关)、LoRa单灯控制器、环境采集单元、故障报警、终端监控平台组成的智能照明系统,实现路灯网络开关、智能调光、故障报警、数据监测分析等功能,提高城市路灯远程监控、智能管理水平。     

模拟路灯控制系统的设计与实现

为解决城市路灯照明系统存在的灯光控制方法和管理手段落后,所用灯具科技含量低等问题,设计了一个模拟路灯控制系统.采用高效节能LED路灯作为光源,采用AT89S52单片机作为控制中心,利用传感器模块、光控路灯模块、恒流源模块来实现,根据环境、交通等因素,单片机采集光敏电阻或光电开关的信号控制路灯的亮灭,具有自动检测故障报警等功能;采用切换多种模式方式设定并实现PWM调光功能,按规定时间开关灯功能.测试结果表明,路灯驱动电源输出功率能在规定时间按设定要求自动减小,该功率能在20%～100%范围内设定并调节,调节误差小于2%,实现了路灯的智能化控制,节省了电力能源和人力资源.     

基于AVR单片机的LED显示屏的灰度设计与实现

设计了一种基于AVR单片机的LED灰度显示屏系统,该系统采用PC机—主控单元—显示子模块3级模式,其中PC机用于更新信息数据,显示子模块用于灰度显示控制,主控单元是PC机与显示子模块的桥梁。利用AVR单片机自身的内部数据存储能力,结合其软件扫描控制能力及高速运算能力,通过调节驱动LED的脉冲电流的占空比的方式解决了LED显示屏的灰度显示控制。给出了系统的软、硬件实现方案。     

基于STC90C52RC单片机的尿不湿手机报警装置

该文提出了一种基于STC90C52RC单片机的尿不湿手机报警装置。该装置主要由单片机、电源模块、湿度传感器检测模块、LED灯光报警模块、控制模块、GSM模块、键盘模块、LCD显示模块、机械开关等组成,借助成熟的GSM移动网络,不仅能精确检测到被护理人的排便,而且可以通过手机进行报警,真正实现了远距离、高效率报警。     

基于直流电压变换技术的模拟路灯控制系统设计与实现

为解决城市道路路灯系统的智能控制、故障自动识别及LED恒流驱动等关键技术问题,设计基于直流电压变换技术,以单片机为控制核心的模拟路灯控制系统。系统通过环境光线检测、定时控制、光电传感器、脉冲宽度调制等技术手段,实现路灯智能控制、故障自动识别、LED恒流驱动、功率调节等功能。测试结果表明,路灯控制系统具有可靠性高、成本低廉、节能环保、操作便捷等优势,满足现代城市道路路灯控制系统的实际需求。     

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.