山东科技大学学士学位论文I三相智能电表设计学士学位论文摘要随着整个社会用电量的剧增，传统电表已经难以完成复杂的电量测量管理任务。本次设计的智能电表以美国炬力公司生产的高性能电量芯片ATT7030A 为测量芯片，该芯片是一款高精度的三相电能计量芯片，可以完成三相电能参数的精确测量，且具有三相三线和三相四线转换功能。本设计能够较为容易的转化为工业、民用计量产品，满足计量测试需要。本设计的主要工作包括硬件设计和软件设计两个方面。硬件设计选用AT89S52 单片机作为系统处理核心，提高三相智能电度表的多功能化程度；选用 X5045 作为看门狗电路，完成对 CPU 运行状态、电源电压等监控；X5045 内部具有 512 字节的 FLASH 存储器，存储相关参数，做到掉电数据不丢失；通过 75LBC184 完成 485 通信功能，传输距离可达到 1200 米；配置了 38KHz 的红外发送 /接收电路，完成红外抄表功能，传输距离大于4 米。软件设计部分主要包括主程序、电量采集子程序、键盘显示子程序、网络通信子程序、红外通信子程序等五部分。本设计经过实验测试，实现了对电能的精确测量、数据存储、数据显示、485 通信、红外通信等功能，达到了设计要求，表明本设计方案是正确的。关键字：三相智能电度表；ATT7030A；单片机；红外通信；485 通信山东科技大学学士学位论文IIABSTRACTWith the increasing of social power consumption, traditional ammeter has been difficult to perform complex power measurement management. The design of smart ammeter is based on high-performance power chip ATT7030A, which is produced by American Hitrendtech company. This chip is a high-precision three-phase electricity measurement chip, which can complete three-phase power parameter measurements precisely. Besides, it has a three-phase three-wire and three-phase four-wire conversion function. This design work can easily into industrial and civil measurement products to satisfy the measurement need. The main work of the design includes hardware design and software design. The hardware design chooses AT89S52 single-chip-computer as system processing core, improving the multifunction degree of the three phase smart ammeter. The ammeter chooses X5045 as watch-dog circuit to achieve monitoring CPU running condition and power supply voltage. There are 256 bytes of FLASH memory in X5045, which can storage related parameters and the data will not lose when power down .System competes RS-485 communication function by 75LBC184 and its transmission distance beyond 1200 meters. The design configurations 38 KHz infrared Transmit/receive circuit, to complete infrared reading function with transmission of 4 meters. The 山东科技大学学士学位论文IIIsoftware design mainly includes main procedure, power acquisition procedure, keyboard and display procedure, network communication procedure, infrared communication procedure, ECT. By the experiment test, the design achieve the precise measurement of the electrical energy, data storage, data display, 485 communication, infrared communication and other functions, satisfying the design requirements, shows that this design program is correct.Keywords: The three-phase smart ammeter；ATT7030A；single-chip-computer；Infrared communication； RS-485 communication山东科技大学学士学位论文IV目录摘要 .1ABSTRACT.21 绪论 .51.1 课题选择背景及目的 .51.2 国内外研究状况 .51.3 课题设计研究方法 .62 系统整体方案设计 .72.1 系统设计思路 .72.2 方案论证 .72.2.1 三相电参数的测试与计量方案论证与比较 .72.2.2 多功能化模块的方案论证与比较 .82.2.3 电压、电流采样方案论证与比较 .92.3 本设计的主要工作 .103 系统硬件设计 .113.1 硬件整体系统设计 .113.2 电源电路设计 .123.2.1 工作原理 .133.2.2 变压模块 .143.2.3 整流模块 .143.2.4 滤波模块 .143.2.5 稳压模块 .153.3 电压电流采样处理单元 .173.3.1 A