摘要:随着中国经济的发展,电力资源正逐渐成为人民生产、生活不可缺少的一部分.而传 统的电量计量工具有的功能单一,有的安全性、可靠性差,精度有限等,已经不符合现代电 量科学管理的要求.本文设计的数字式多功能复费率电度表,主要用于家庭或工厂的电能 消耗测量.它不仅能进行电能计量、还具有费率管理、通讯等功能,同时具有计量精度高、 电磁兼容性能好、过载能力强,功耗低等特点。该电能表以单片机为主控芯片,以 ADE7758 为计量核心,是纯电子的电量测量仪器,可靠性高。在单片机的核心控制下,实现了电子式 电能表电能分时段计量、数据通信等功能。65410
毕业论文关键词:数字式电能表,电能计量,ADE7758
Abstract:With the development of Chinese economy, power resources is becoming an indispensable part of people's life and production.Single functions, traditional power measuring tools, some security, poor reliability,limited accuracy etc, has not accord with the requirement of modern scientific management power.Design of digital multifunctional compound rate meter, mainly used for household or plant power consumption measurement.It can not only for electric energy metering, also has the rate management, communications, and other functions, and has a high measuring accuracy and good electromagnetic compatibility, strong overload capacity, low power consumption characteristics.The watt-hour meter with the single chip processor as the master control chip, ADE7758, for measuring core, is pure electronic power measuring instrument, high reliability .Under the core control of single chip microcomputer, the electronic energy meter can be pided into time measurement, data communication and so on.
Key words: Digital power meter, energy metering, ADE7758
目 录
1 引言 4
1.1 课题研究背景 4
1.2 课题的理论意义 4
1.3 课题研究的主要内容 4
2 电能表工作原理 5
2.1 功率计算模型 5
2.2 电能计算模型 5
2.3 复费率概念和功能 6
3 硬件设计 7
3.1 硬件总体设计 7
3.2 电能计量 8
3.2 ADE7758 的工作原理与内部框图 8
3.2.2 ADE7758 外围电路设计 10
3.3 MCU 控制部分 10
3.4 电源模块设计 12
3.5 LCD 显示电路设计 12
3.6 MAX232 简介 13
3.7 DS1302 时钟电路 14
3.8 EPROM 数据存储 20
4 软件设计 16
4.1 系统软件总体设计 16
4.2 ADE7758 电能计量部分软件设计 17
4.3 LCD 显示原理 17
4.4 DS1302 时钟软件显示 18
5 总结 20
参考文献 21
致谢 22
附录 23