读取旋转体转速信号，计算转速值，并且设置报警值，同时输出对应电压值。-Read rotating body rotation speed signal, calculating the speed value, and set the alarm value, while the corresponding output voltage.

分别读取两个信号，比较两个信号的时间周期，得出这两个信号的角度差。得出发动机的提前角。-Separately read two signals, comparing two signal cycles, two signals arrive at such a bad angle. Derived engine advance angle.

Top Ten Things Every DBA Should Know About SQL Server Brian D. Egler, Global Knowledge Course Director, MCITP, MCT 2010