论文部分内容阅读
本文通过对检测信号干扰的分析,得出以1/8工频周期的速度采样,并实行八次采样值平均加权滤波,结合采样器的前置滤波,可以获得对工频及其谐波分量干扰的高精度滤波。本方法的特点是利用工频同步八倍频电路,使采样速度自动跟踪工频的变化,对于工业过程信号的测量具有广泛的适用能力。文中详细介绍作者所设计的工频同步八倍频电路,并且探讨工频抗干扰滤波器在微型机上的具体实现过程。
In this paper, through the analysis of the interference of the detection signal, it is concluded that the sampling rate is 1/8 of the power frequency period, and the weighted average of eight samples is used. Combined with the pre-filter of the sampler, the power frequency and its harmonic components High-precision interference filtering. The method is characterized by the use of frequency-frequency synchronous octave circuit, so that the sampling rate automatically track changes in power frequency for industrial process signal measurement has a wide range of capabilities. This paper describes in detail the author designed the frequency-frequency synchronous octave circuit, and discusses the frequency anti-interference filter in the micro-specific implementation process.