研华4711a数据采集卡输出和输入界面，能够采集电压电流信号，能够输出电压和可调的频率的脉冲信号-Advantech Data Acquisition Card 4711a output and input interface, to collect voltage and current signals to the output voltage and adjustable frequency pulse signal

ADE7753 单相电能检测，实现对电压、电流、功率及用电量等计算。-ADE7753 single-phase energy detection, to achieve the voltage, current, power and consumption of electricity and other computing.

ADE7758实现对三相电能的检测，包括电压、电流、功率及电量等检测-ADE7758 achieve the three-phase power testing, including voltage, current, power and electricity, such as testing

用FPGA产生锁相环控制，随时跟踪输出电压，电流的幅值和频率，采样到实时信息-FPGA PLL