本科毕业论使用文__基于单片机的电子式电能表设计与研究初版.doc

基于单片机的电子式电能表设计与研究 摘要 随着经济的迅速发展，用电量日益增加，为电网的稳定运行带来了诸多不良因素。国家采取多费率用电政策，以消峰填谷，平衡用电。复费率电能表己经大规模取代了单一费率电能表。随着单片机技术的日益发展，以单片机为主控芯片的电子式电能表的生产已成规模。但是价格低廉、运行稳定、可靠性高、抗干扰能力强的电子式电能表还有待开发。 论文在对电能计量和数字信号处理理论研究的基础上，以美国ADI公司生产的ADE7755为电能计量芯片，以89C52为主要控制芯片，利用单片机技术，设计开发了一款单相复费率智能电子式电能表。硬件外围电路采用模块化设计。其中电压电流采样模块实现了将电网中的不可直接测量的大电压大电流转变成为可以用来处理测量的小电压小电流。电源模块为整个智能电表提供了稳定的电源。数据存储模块，红外通信模块和RS485通信模块的设计完成了电能信息的及时存储和交换。显示控制模块为用户提供了清晰，实时的电量信息。软件分为启动前的动态自检程序，计量电量的电能脉冲采集程序，数据信息处理和交换的数据存储程序，通讯中断子程序。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。 关键词 电子式电能表；ADE7755；电能计量；信号处理 The design and research of electronic watt-hour meter based on single chip Abstract With the development of economy and the increase of the electrical quantity, the running of the electric fence is threatened heavily. The government of china has adopted the policy of different prices of the electrical power, in order to keep balance of the electrical quantity consumption. Multi-rate watt-hour meter has taken the position of the single-rate watt-hour meter widely. With the development of single-chip technology, the research of electronic watt-hour meter is produced in a huge range. But, the low-price watt-hour meter which runs stably and has strong ability to resist interference still need to be designed. The paper is based on the research of electric energy measurement theory and digital signal processing theory, mainly utilizes chip ADE7755 produced by ADI company to measure power, single chip 89C52 to control the whole system. The paper finished the design of the single-phase intelligent Multi-rate watt-hour meter. The peripheral hardware adopted module design. Voltage and electricity module converts the high voltage and electricity to low ones that can be measured. The source module provides the whole system stable power. Data storage module, infrared communication module and RS485 module can storage and exchange the power information. LCD module provides users with clear and real-time energy information.