通过点火脉冲测量汽油机转速的方法

A method to measure the gasoline engine's speed by igniting impulse

介绍了一种通过点火脉冲和硬件测量汽油机转速的实现方法 .该硬件电路采用锁相环技术来实现倍频 ,且全部采用CMOS低功耗器件 ,它的电源直接来自汽油机的点火脉冲 ,无需外接电源及内部电源 ,通过样机实验表明 ,该测速电路功耗极低 ,测量误差在± 1r/min以内 ,足以满足实际的需要 ,且安装方便、简单实用 。

This paper introduces a method to measure the speed gasoline engine by igniting impulse and hardware.The hardware circuit adopts the technology of phase locked loop to realize multi frequency and CMOS components of low dissipation.The power source of the hardware circuit is directly from the igniting impulse, it doesn′t need external power and internal power. The experiments show that its powor dissipation is very low and its measuring error is within ±1 r/min. Accordingly,it meets actual meed sufficiently.In addition,its convenient installation,simplicity and reality facilitate wide using.