As long as the shaft per revolution, resulting in one or multiple fixedpulse, and pulse into the microcontroller to count, you can get speed information.
只要转轴每旋转一周，产生一个或固定的多个脉冲，并将脉冲送入单片机中进行计数，即可获得转速的信息。
2
Fixed photoelectric detectors on the two reflectors, they produce a pulse signal as reference signal every round.
在两个反射镜上安装光电探测器，使之转一周产生一个脉冲信号作为基准信号。
3
It also includes, Hall element inputs, a sequencer for commutation control, fixed off time pulse width modulation (PWM) current control and locked rotor protection.