涡街流量计信号估计的自适应陷波方法

An Adaptive Notch Filtering Method of Signal Estimation for Vortex Flowmeters

本文提出采用自适应陷波方法计算涡街流量计输出信号的频率 ,并给出实验结果。流量计信号为一窄带信号 ,自适应陷波抑制一个特定的频率 ,即涡街频率 ,并且几乎不受位于带宽以外频率的影响。此自适应陷波器只需估计一个参数 ,频率计算非常简单。与以前的频率估计方法相比 ,它有许多优点 。

An adaptive notch filtering method is proposed for computing the output signal frequency of vortex flowmeters,and the experimental results are given in this paper.The flowmeter signal is modelled as a narrow band process.The adaptive notch filter suppresses a particular frequency,i.e.vortex frequency,and has almost no influence on frequencies which lie outside the bandwidth.The adaptive notch filter has only one parameter to be estimated,the interesting frequency value can be computed very simply.It has advantages over previous frequency estimating methods,and is a new kind of efficient method.