First the input signal processed by the high-speed optocoupler and the sample circuit,then 89C55WD using two 32-bit timers surveyed time interval of the seriate pulse in inte.

• 首先,将输入的信号经过高速光耦合器和采样电路处理;然后,89C55WD在中断方式下利用两个32位计时器交替对连续脉冲信号的间隔时间进行测量。