一种基于A／D采样的低频信号测量方法：介绍了数据采样的方法．相应的硬件电路的设计．软件算法。并给出测量结果分析和减小误差补偿的方法-Based on A/D sampling of the low-frequency signal measurement method: The method of data sampling. Corresponding hardware circuit design. Software algorithms. And gives the results of