为了有效地提升铅酸蓄电池的使用寿命,同时实现对充电过程的监控,设计出一种用单片机控制的36 V铅酸蓄电池充电电源。本电路采用反激式拓扑,连续电流工作模式,电源管理IC设计在电源的副边,由ELAN公司的EM78P258N单片机模拟,是用可编程器件模拟电源管理IC,实现智能电源低成本化的一次成功尝试,通过对单片机的软件设计实现了充电电源的状态显示、充电时间控制、报警、过温保护、过压保护、过流保护等功能。本充电器真正的实现了铅酸蓄电池的三段式充电过程,其最高输出功率可达90 W,效率约85%,成本不到20元,具有很高的市场竞争力。 Abstract: In order to extend the life of lead-acid battery efficiently and supervise the charging process meanwhile, a 36V lead-acid battery charge powe supply controlled by microcontroller is designed. The charger is flyback switching power supply and works in CCM mode. A EM78P258N microcontroller made by ELAN microelectronics corporation is used as power management IC which is designed at the secondary circuit. The project is a successful attempt to low-cost intelligent power used microcontroller simulating power management IC. The charger also has the functions of the status reveal, charge time control, alarming, thermal protect, current limit and overvoltage protect by the software design. The circuit actually implements the three-step charge process, whose power is up to 90W and whose efficiency can get 85%. The net cost of this charger is less than 20 RMB, so that the charger is of powerful market competitiveness.
上传时间: 2013-11-16
上传用户:cepsypeng
MSP430 系列单片机是一种超低耗性能的单片机品种。本文介绍了一种基于MSP430F149 的GSM 电子门匙的设计, 并且通过调试, 给出此方案的可行性结论。 关键词: MSP430F149 单片机 超低耗 GSM 电子门匙 可行性 本文设计了一种基于MSP430F149 单片机的GSM 电子门匙, 实现开、关门的全自动, 是传统机械锁的突破和创新, 该GSM 电子门匙的主要功能有: 1) 手机短信遥控门开、关功能, 免除没带钥匙的尴尬。 2) Flash 数据存储功能, 可以存储60kB 字节数据, 系统掉电数据不丢失。 3) 非正常开门短信报警功能。 4) 开关门密码, 识别手机号码用户自行设定。
上传时间: 2013-11-14
上传用户:whymatalab
介绍一种以Atmel公司的Attiny13为处理器的投影仪防盗器设计方案。该防盗器具有功耗低,功能完整,防盗效果良好等特点,除具有报警功能外,防盗器还具有以无线方式向主机发送报警信号的功能。采用315MHz发射模块实现无线信号发送。该投影仪防盗器可适应众多厂家生产的防盗器主机。 Abstract: This paper introduces the design scheme of overhead projector's anti-theft device which users ATMEL company’s Attiny13as processor.This anti-theft device features low powerloss,functional integrity,good effect of anti-theft.In addition to its own with alarm functions,the anti-theft device also has alarm function which can send alarm signal to the host through wireless way.It sends wireless signal using315MHz transmitting module,so this overhead projector’s anti-theft device is adapted to anti-theft device host produced by many manufacturers.
上传时间: 2013-11-02
上传用户:ysystc699
摘要 本单片机系统设计的目的是应用单片机控制技术,以8051单片机为核心控制庆丰热电公司的800立方米的水箱的水位,并实现了报警和手动、自动切换功能。该系统操作方便、性能良好,比较符合电厂生产用水系统控制的需要。本文还详细的给出了相关的硬件框图和软件流程图,并编制了该汇编语言程序。
上传时间: 2013-11-15
上传用户:ywcftc277
摘要:随着住宅小区规模的不断扩大,小区的防火报警功能显得越来越重要。就此研制了基于MSC1211单片机的防火报警网络系统。该系统在各个火警布控点设置了独立的监控设备,并通过INTERNET网交换信息。详细介绍了系统硬件结构和软件设计,同时给出了电路原理图和程序流程图。实际运行证明:系统可靠性高、反应灵敏、工作速度快,具有很好的实用价值。 关键词:传感器 防火报警 监控节点 控制中心节点
标签: SINGLE-CHIP MICROPROCE 1211 MSC
上传时间: 2013-10-11
上传用户:xaijhqx
采用单片机AT89C2051实现温度测量与控制,键盘和显示电路实现温度的设定、修改、清零以及当前温度值的显示,并对温度超过上下限进行报警。阐述了该系统设计的硬件和软件设计。 Abstract: The system of temperature measuring and controling is realized based on AT89C2051.The keyboard and display circuit is designed,which can be used for setting and modifying temperature value,resetting and displaying the present temperature value.At the same time the warning circuit is also designed in the system,which can deal with the alarm when temperature exceeds the upper limit and the lower limit.The hardware and software design of the system are explained.
上传时间: 2013-11-18
上传用户:leehom61
设计并制作了基于AT89S52 的高精度家用空调温度控制系统。系统硬件主要由电源电路、温度采集电路(DS18B20)、按键、显示电路、控制电路及其他辅助电路等部分组成,软件采用8051C语言编程。该系统可以完成温度显示、温度设定、空调控制及限温报警等多项功能,在现代生产生活中具有极高的应用价值。
上传时间: 2013-11-04
上传用户:lijianyu172
为解决输油管道温度压力参数实时监测的问题,设计了以C8051F930单片机作为控制核心的超低功耗输油管道温度压力远程监测系统。现场仪表使用高精度电桥采集数据,通过433 MHz短距离无线通信网络与远程终端RTU进行通信,RTU通过GPRS网络与PC上位机进行远程数据传输,在上位机中实现数据存储和图形化界面显示,从而实现输油管道温度压力参数的实时监测和异常报警。经实验证明,该系统的12位数据采集精度满足设计要求,漏码率小于1%,正常工作时间超过5个月,能实时有效地监测输油管道的温度压力参数,节省大量人工成本,有效预防管道参数异常造成的经济损失和环境污染。 Abstract: In order to solve the problems on real-time monitoring of pipeline temperature and pressure parameters, the ultra-low power remote pipeline temperature and pressure monitoring system was designed by using the single chip processor C8051F930 as the control core. The high-precision electric bridge was used in field instruments for data collection, the 433MHz short-range wireless communication network was used to make communication between field instrument and RTU, the GPRS was used by the RTU to transmit data to the PC host computer, and the data was stored and displayed in the PC host computer, so the real-time monitoring and exception alerts of pipeline temperature and pressure parameters were achieved. The experiment proves that the system of which error rate is less than 1% over five months working with the 12-bit data acquisition accuracy can effectively monitor the pipeline temperature and pressure parameters in real time, it saves a lot of labor costs and effectively prevents environmental pollution and economic losses caused by abnormal channel parameters.
上传时间: 2013-11-07
上传用户:cuibaigao
本文介绍了基于AT89C52 单片机的自动水温控制系统的设计及实现过程。该系统具有实时显示、温度测量、温度设定并能根据设定值对环境温度进行调节实现控温的目的以及达到上下限温度报警功能,控制算法是基于数字PID 算法。关键词 :PID AT89C52 脉宽调制 实时 Abstract : This article describes AT89C52 single-chip microcomputer-basedautomatic water temperature control system design and implementation process. Thesystem has real-time display, temperature measurement, temperature settings and theenvironment in accordance with the temperature settings adjusted to achieve thepurpose of temperature control and reach the upper and lower limits of temperaturealarm function, the control algorithm is based on the digital PID algorithm.Keyword: PID AT89C52 PWM real time
上传时间: 2013-10-10
上传用户:归海惜雪
随着科学技术的快速发展,超声波将在科学技术中的应用越来越广。本文对超声波传感器测距的可能性进行了理论分析,利用模拟电子、数字电子、微机接口、超声波换能器、以及超声波在介质的传播特性等知识,采用以STC89C52 单片机为核心的低成本、高精度、微型化数字显示超声波测距的硬件电路和软件设计方法在此基础上设计了系统的总体方案,最后通过硬件和软件实现了各个功能模块。为了保证超声波测距传感器的可靠性和稳定性,采取了相应的抗干扰措施。就超声波的传播特性,超声波换能器的工作特性、超声波发射、接收、超声微弱信号放大、波形整形、速度变换、语音提示电路及系统功能软件等做了详细说明.实现障碍物的距离测试、显示和报警,超声波测距范围30CM-300CM,精度在十厘米左右。这套系统软硬件设计合理、抗干扰能力强、实时性良好,经过系统扩展和升级,可以用于倒车雷达、建筑施工工地以及一些工业现场,例如:测量液位、井深、管道长度等场合。可以广泛应用于工业生产、医学检查、日常生活、无人驾驶汽车、自动作业现场的自动引导小车、机器人、液位计等。
上传时间: 2013-11-05
上传用户:lixinxiang