基于单片机的太阳能手机充电器设计毕业论文.doc

基于单片机的太阳能手机充电器设计毕业论文.doc专升本学生毕业设计(论文)
题目:基于单片机的太阳能手机充电器
学号: 261080141
学院: 工程技术学院
专业: 电子信息
年级: 2010级
指导教师: (签名)
2012年05月20日
基于单片机的太阳能手机充电器
中文摘要
能源的日益枯竭、人们对环境保护问题的重视程度也在不断提高,寻找洁净的替代能源问题变得越来越迫切。太阳能作为一种可再生能源它具有取之不尽、用之不竭和清洁安全等特点,因此有着广阔的应用前景,光伏发电技术也越来越受到人们的关注,随着光伏组件价格的不断降低和光伏技术的发展,太阳能光伏发电系统将逐渐由现在的补充能源向替代能源过渡。
目前对太阳能的利用主要体现在两个方面:光热转换与光电转换,本文利用太阳能光电转换的特性,设计了一种在没有电源的情况下也能随时随地给各种移动设备充电的便携式智能型太阳能充电器。
本文设计是以Atmel公司的AT89S51单片机作为控制核心,由按键指示电路、数码管显示电路、BUCK斩波电路和A/D采集电路等组成的,实现将太阳能转化为电能,然后由LM7805提供稳定电流,经过DC/DC变换电路处理后,由充电电路为负载供电。系统还加入了单片机控制按键,以便自由选择充电模式和充电时间,具有根据返回手机电流情况,来控制降低电流的输入和停止充电功能,以免过分充电会损坏电池,反馈输出电流的情况,达到充电智能化的效果。
关键词:太阳能,电池,单片机,智能
Multi-purpose solar mobile charger
Abstract
Increasing depletion of energy, it's emphasis on environmental protection are also rising, look for clean alternative energy issues e more urgent. Solar energy as a renewable energy it has an inexhaustible and clean and safe and so on, so have a broad application prospects, photovoltaic power generation technology is more and more attention, with the PV module continue to lower prices and photovoltaic technology, solar PV systems will gradually supplement the energy from the current transition to alternative energy.
At present the use of solar energy is mainly embodied in two aspects: the sunlight transformation and photoelectric, this paper, by using solar photoelectric characteristics, design a way that there is no power it can also charger for various mobile anywhere at any time.
This design is the pany AT89S51 as control core, buttons, and digital circuit by instructions pipe display circuit, BUCK the chopper circuit and A/D acquisition circuit position, to realize the solar energy into electrical energy, and then by LM7805 to provide A stable current, after DC/DC transform circuit after treatment, by charging circuit as the load power supply. The system also joined the single-chip puter control key, so that the freedom to choose charging mode and charging time, according to the current situation is to retu