多功能电气参数测试仪摘要：本三相多功能电表采用凌阳 SPCE061A 板控制器，以高精度的三相电能专用测量芯片 ATT7022A 为核心测量芯片，实现对三相工频交流电三相电压、三相电流、三相有功功率、三相无功功率、总有功功率、总无功功率、功率因数、电网频率、有功电能和无功电能的测量与显示，测量精度高，且具有电压和电流相序检测、掉电存储、密码保护等功能。本设计还通过 RS-485 通讯实现远程测量、红外通信实现向掌上 PDA 手抄表的信息传送，并通过按键菜单和 LCD显示提供人机交互界面。关键字：ATT7022A、SPCE061A、标准 RS-485 通讯、红外数据通信、LCD 显示模块Abstract: The three-phase multi-function meter with Sunplus SPCE061A board controller, dedicated to high-precision measurement of three-phase electrical energy measurement chip ATT7022A core chip to realize the measurement and display of the paraments concerning three-phase AC frequency, including three-phase current, three-phase active power, three-phase reactive power, total active power, total reactive power, power factor, power frequency, active energy and reactive energy ,with high accuracy.Besides,it has phase sequence voltage and current detection, power-down storage, password protection and more features. As well,its design of communication through RS-485 remote measurements and IrCOMM Ir Communications makes the information of Palm PDA hand meter reading conveniently, and through the button menu and LCD ,the three-phase multi-function meter aslo provides man-machine interface. Keywords: ATT7022A, SPCE061A, Standard RS 485 communication, infrared data communication,LCD display module.一 、系统方案设计与比较在采样系统中，通常的做法是将采集到的数据读取到 MCU 中，由 MCU 对大量的采样数据进行处理，得到电压、电流、相位、功率因数等参数。由于大量的采样和数据运算给 MCU 带来很大的负担，大大影响 MCU 处理其他问题的速度。ATT7022 是一款国产的电能计量专用芯片，比进口电路价格低廉。除了 A／D 转换部分，在芯片...
