【作者】 宁靖；

【导师】 朱志杰；

【作者基本信息】 湖南大学 ， 仪器科学与技术， 2011， 硕士

【摘要】 从最初的感应式电表到现在大规模使用的电子式电能表,电能表的使用已经有了一百多年的历史。现代高端的电子式电能表在准确度、功能多样性、可靠性等方面有了很大提高。智能电网的发展对测量表计提出了新的要求,包括信息采集数字化、通信平台标准化、软硬件设计模块化、功能智能化以及完善的通信安全体系。本文采用MCU+专用测量芯片ATT7022B设计了一种基于多种通讯模式的三相电子式电能表,外部通讯有电力线载波、GPRS、RS485三种模式,系统准确度和可靠性高,功能丰富且成本较低。全文共分为5个部分:第1章为绪论部分,主要介绍电能表发展现状及趋势,指出了课题的研究背景及意义,阐述了本文的主要研究内容。第2章是对基于多种通讯模式的三相电能表的相关原理的阐述,主要包括电能表测量原理分析,SPI和I2C总线通信原理以及电能表与上位机的通讯模式研究。第3章是硬件设计部分。在第二章基本原理分析的基础上,根据电能表的功能要求进行了相关电路的设计,主要包括信息采集和电能测量模块,数据存储模块,外部通讯模块,电源模块和MCU外围电路设计。第4章是软件设计部分。软件设计是在层次化基础上,对每个层次进行模块化设计,主要包括系统初始化模块,时钟模块,掉电处理模块,电能测量模块,外部通讯模块,SPI总线模块,以及I2C总线的软件实现。结论部分总结本文的主要工作,提出系统的创新点和不足,指出了今后的研究方向。更多还原

【Abstract】 From the initial inductive meters to the popular used electronic meter, electronic power meter has a history of more than 100 years. Modern high-end electric meter had greatly inproved in accuracy, reliability, and function diversity,etc. The development of intelligent grid put forward new requirements to measuring meter, including digital information collection, standardized communication platform, modular software and hardware design, intelligent function and perfect communication security system.Paper designed a three-phase electronic meter based on multi-communication mode, using MCU and special measuring chip ATT7022B. There are three external communication modes, them are power line carrier-current, GPRS, and RS485. The meter has high accuracy and reliability, rich function, and low price. Full text is divided into five parts.Chapter 1 is the introduction part, which introduced the development statusnd tendency of energy meters, pointed out the background adn significance of the research, and expounded the main research contents of this paper.Chapter 2 expouned the relevant principle of three-phase energy meter, including the principle of energy metering and communication using SPI and I2C bus, and the research of lower level channel and uplink channel of communication.Chapter 3 is the hardware design part. Based on the basic principle analysis in chapter 2, and according to the function requirements of energy meter,designed the related circuit. Including the information collecting and electricity measuring module, data storage module, external communication module, power supply module and the disigning of MCU peripthe circuit.Chapter 4 is the software design part. Software design is based on the hierarchical, modular designed each level, including system initialization, the clock module, drop electric processing modules, electricity measurement modules, external communication module, SPI bus module, and the I2C bus software realization.The conclusion of this paper summarized the main work, innovative point system is presented and the shortage, points out the future research direction.更多还原