本文介绍一种转速与相位差快速测量接口,它能在计算机起动命令后的一个信号周期内获得高精度的测量结果。文中对接口的工作原理、测量误差和电路的可靠性进行了较详尽的讨论,最后还给出了一个实用的Basic测量程序。 This article describes a fast speed and phase difference measurement interface, which can obtain high-precision measurement results in a signal cycle after the computer starts the command. In this paper, the working principle of the interface, the measurement error and the circuit reliability are discussed in detail, and finally a practical Basic measurement program is given.