As long as the shaft per revolution, resulting in one or multiple fixed pulse, 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。

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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。

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It also includes, Hall element inputs, a sequencer for commutation control, fixed off time pulse width modulation (PWM) current control and locked rotor protection.

它还包括霍尔元件输入、整流控制定序器、固定停机时间脉冲宽度调制(PWM)电流控制以及锁定转子保护。

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He was not breathing, there was no pulse, the pupils of his eyes were fixed and dilated.

BBC: Keanu Williams's mother and partner 'beat him to death'