摘  要现代社会的发展和电能息息相关，但是现代社会的飞速发展，使电能供需之间有了很大的矛盾。计量电能时采用分时计费可以在一定程度上缓解这一供需矛盾。但旧式的电能表不具有分时计量功能，所以以研发单片机技术为基础的新型多功能电能表成为热门。

本次设计采用MSP430F149单片机为主控芯片，其具有复费率、RS-485通讯和红外通讯方式抄表等功能。实现自动远程抄表是当前用电管理的迫切需要，本设计中系统同时实现了两种抄表方案，一种是使用抄表微机通过红外通讯的方式实现本地的抄表方式，保证通信线路无法正常使用时仍可以在现场扫描数据，另一种是通过RS-485接口有线通讯方式实现远程自动抄表方式。为了以后功能扩展的需要，本系统预留了无线通讯方式接口。随着电能表的普及，电能表的保护工作更加重要。因本设计中加入有线通信，容易因雷击等原因引入过电压。所以，为了防止雷电波从电缆入侵，系统额外添加了相应保护。为应对高科技窃电，本设计讨论几种防窃电手段，以防止国家重要电力资源被窃取。69578

该设计有图23幅，表1个，参考文献27篇。

毕业论文关键词:单片机  MSP430F149  多功能电表  RS-485  电表保护

Design Of Single-Phase Multi-Function Electrical Meter Based On MSP430 Single-Chip Microcomputer

Abstract

Modern social development and energy are closely related, but the rapid development of modern society cause of greatly contradiction between power supply and demand. To a certain extent the time-sharing of billing can ease the contradiction between supply and demand when measuring electric energy. The old style electric energy meter does not have the function of time sharing, so it is popular to make multi-function watt-hour meter based on Single-Chip Microcomputer.

In this design the main control chip is MSP430F149. There are many functions in chip such as multiple rates, RS-485 communication and infrared communication mode meter reading. Automatic remote meter reading is the urgent need for managing electrical energy now. In this design, the system supports two kinds of meter reading methods. One is using infrared meter reading machine to achieve the local of meter reading in case communication lines can not be used normally. The other one is to realize remote automatic meter reading through RS-485 interface. The system set aside a wireless communication interface in order to expand the needs on the future. With the popularization of electric energy meter it is more important to do a good job of protecting watt-hour meter. It is easy to mix the overvoltage for lightning, because wired communication is added in this design. In order to prevent thunder electric wave invasion from the cable, system must add the appropriate protection. To Prevent the national important power resources were stolen, design discuss several methods of preventing electricity-stolen.

There are twenty three pictures, one chart and twenty seven references in the design.

Key Words: Single-Chip Microcomputer  MSP430F149  multi-function watt-hour meter  RS-485  Watt-hour meter protection

目  录

摘  要 I

Abstract II

目  录 IV

图清单 VI

表清单 VI

变量注释表 VII

1 绪论 1

1.1 课题研究的背景和意义 1

1.2 国内外研究现状