基于FPGA的高精度相位测量仪的设计

Design on Measuring Phase High Accuracy Instrument Based on FPGA

采用Altera CycloneⅡ系列FPGA器件EP2C5,设计了高精度相位测量仪.测量相位差所需的信号源在FPGA内部运用DDS原理生成,然后通过高速时钟脉冲计算2路正弦波过零点之间的距离,最后通过一定的运算电路得到最终相位值,测相精度为0.01°.

This paper adopts Altera Cyclone Ⅱ series FPGA component EP2C5 to design a high-accuracy instrument to measure. Measuring a phase dispatching the required signal source coming into being DDS principle inside of FPGA, the distance have been calculated by high speed clock pulses when two sine waves pass the zero, finally by the certain arithmetic circuit, we can get ultimate phase value,measuring accuracy is 0.01°.