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一种利用固定相移测量同频正弦信号相位差的方法
Authors
鲁华祥
龚国良
Publication date
1 January 2010
Publisher
Abstract
传统的相位差测量方法将信号整形成方波,异或后将方波脉冲的宽度转换为相位差.然而,信号在过零点处的"振铃效应",以及传统方法中引入迟滞比较器去噪带入的延时误差严重影响了测量的准确度.介绍了了几种测量相位差的方法,分析了各自的不足,最后提出了一种新型的利用固定相移测量同频正弦信号相位差的方法.此方法避免了"振铃现象"的影响,避免了引入迟滞比较器去噪带入的延时误差,同时又保留了迟滞比较器去噪的优点,不受信号幅度的影响,不受幅度递减的奇次谐波的影响,对两个同频正弦信号的相位差实现精确测量
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Last time updated on 10/07/2018