The first sensor monitors the camshaft position delivering one pulse per revolution which corresponds to the top-dead-centre (TDC) position of one of the pistons.
第一个传感器用来监视每次旋转时释放一次脉冲的机轴位置，该位置相当于某一活塞上止点的位置。
Depending on the requirements of the control system, the number of teeth on the cog wheel is defined to allow a resolution of approximately one pulse per degree of crankshaft revolution.
鉴于控制系统的要求，齿轮齿数的确定应与机轴旋转一度产生大约一脉冲的分辨率来确定。
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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