一种快速精确测频方法及应用

针对实际应用中在较短时间内对传感器检测到的单频信号进行快速精确频率测量的要求,介绍了一种改进的多周期频率测量方法,该方法利用被测信号来触发开启同步门,使测量误差与被测信号频率无关,提高了测量准确性。分析了测量中的误差,并给出了该方法在实际设计中的应用,测试结果表明这种方法具有较高的实时性和准确性。

Introduction and Application of a Fast and Exact Frequency Measuring Method

According to the requirement that the frequency of the signal from sensor should be measured quickly and precisely,an improved multi-period frequency measuring method is proposed.The synchronism gate is turned on by the measured signal in this method,which makes the measuring error independent of signal frequency,and the veracity is also improved.The measuring error is analyzed,and an application of the method is also provided.The test result shows that the method has high performance of real-time and verac...