摘要
正弦频率是基本的正弦参数之一,高准确度的低频正弦频率测量技术有广泛的应用.但在低频正弦频率测量方面,目前的频率测量技术在谐波噪声干扰环境下,普遍存在准确度不高的问题.文章提出了一种主要由序列和反褶序列精密初相位计算方法等构成的新型正弦频率测量方法,分析了序列精密初相位计算和将正交混频用于序列相位计算的原理,指出了混频干扰是造成正弦相位计算和正弦频率测量误差的主要内在原因.通过对混频干扰频率的深度抑制,再通过计算序列和反褶序列精密初相位得到的序列全相位差,提高了谐波噪声干扰环境下的正弦相位计算和正弦频率测量的准确度.数学计算、仿真试验和物理实验结果也验证了该方法的正确性和可靠性.
Sinusoidal frequency is one of the basic parameters. The high-accuracy sinusoidal frequency measurement technology has wide applications. But in the aspect of low-frequency sinusoidal frequency measurement,the current sinusoidal frequency measurement technology usually has the defects of lowaccuracy under the environment of harmonic noise interference. This paper proposes a novel sinusoidal frequency measurement method based on precise calculation of initial phase by means of sequence and deconvolution sequence. The measurement principles of precise initial phase sequence calculation and orthogonal mixing calculation for sequence phase measurement are analyzed. It is pointed out that the mixed-frequency interference is the main cause of the measurement error. By severely inhibiting the interference of mixed-frequency,and by calculating the full phase difference of sequence and deconvolution sequence,accuracy of sinusoidal frequency measurement is improved under the environment of harmonic noise interference. Mathematical calculation,simulation test and the physical experiment results also verify the correctness and reliability of the proposed method.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2016年第10期2370-2376,共7页
Acta Electronica Sinica
关键词
反褶序列
精密初相位
序列全相位差
正交混频器
混频干扰频率
数字滤波
deconvolution sequence
precise initial phase calculation
full phase difference of sequence
quadrature mixer
mixing interference frequency
digital filter
