ADE7755全电子式单相电能表..doc

基于ADE7755的二时段单相数字电能表设计 摘 要 Abstract 目录 绪论········································· 课题研究背景及意义···························· 课题研究背景···························· 课题研究意义···························· 数字电能表的发展和现状························ 电能表发展历程·························· 数字电能表未来发展趋势·················· 本文主要研究内容····························· 电能计量原理及多功能电能表通信规约的介绍····· 数字电能表的电能计量原理和方法············ 多功能电能表通信规约的介绍················ 本章小结································ 基于ADE7755的计量模块硬件设计············· 电能计量芯片ADE7755的简介············· 功能简介及功能框图················· 外部引脚及其功能说明················ 电能计量过程介绍························ ADE7755工作原理··················· 电能计量电路设计···················· 单相数字电能表的系统硬件设计·············· 系统的总体设计···························· 系统总体设计思路······················· 电能计量电路的基本组成················· 电源模块设计······························ 控制模块设计······························· 单片机8051简介························ 控制电路设计························ LCD显示模块设计··························· LCD显示器工作原理简介·············· 芯片1602简介························ 显示电路设计························· 通信接口模块设计···························· 51单片机的串行通信基础········· RS232串行口标准简介·············· MAX232简介························ 通信接口电路设计···················· 数据存储模块设计·························· 芯片24C02简介····················· 存储模块电路设计··················· 时钟芯片································ DS1302简介 时钟电路设计 单相数字电能表的系统软件设计············· 软件集成开发环境简介········· Keil C51μVision3介绍 编程语言选择 数字电能表系统软件的总体设计············ 系统软件主程序设计······················ 电能计量模块···························· LCD显示模块······························ 数据存储模块······························ 时钟芯片································ 课题结论与展望··························· 参考文献········································ 绪论 课题研究背景及意义 课题研究背景 传统的感应式机械电能表从1890年发明以来已经有一百多年历史,虽然经过多方面改进,但仍然存在个突出问题:①工作不稳定,精度低,内部的转动元件难免产生机械磨损,使电能表测量误差越来越大;②体积庞大,价格昂贵;③由于构造原理的问题,很容易窃电。于是新型的数字式电能表应用而生。数字式电能表可视性强,大致可分为以下两类。第一类是在原来机械式电能表的基础上,仅在表盘上打一个很小的光电检测孔,表盘每转一