可避免电压过零点影响的新型频率测量方法

New method avoiding voltage cross-zero point for measuring the frequency

提出了一种将三点式曲线拟合与多点绝对值和补偿相结合的新型频率测量方法。该方法不受电压过零点的影响 ,在任何采样点都具有稳定和可靠的计算精度 ,且对谐波有一定的抑制能力。

This paper described a new method for measuring frequency.This method is based on the curve fitting technique with only three points and uses multi point frequency compensating technique to avoid voltage cross zero point errors.It provides a fast,simple and reliable frequency measurement with accuracy.And harmonic terms are reduced effectively in the method without filter.