【摘要】 根据涡街信号的特点及其对信号处理方法的要求 ,借鉴最大似然谱估计方法的研究成果 ,在周期图法的基础上提出了更适用于涡街频率估计的松弛陷波周期图法 ,该方法兼有高频率分辨率和高计算效率的特点 ,而且有很强的抗复杂噪声干扰的能力。同时进行了仿真和实验 ,证明该方法是一种有效的涡街信号处理方法 ,能够在一定程度上提高流量计精度 ,扩大量程比 ,增强抗干扰能力更多还原

【Abstract】 It describes the relaxing notch periodogram (RNP) method which is applied to vortex flowmeter signal processing,based on the characters of vortex signal and the research findings of maximum likelihood (ML)estimate.This method possesses high frequency resolution,computational efficiency and noise immunity.Moreover,the results of simulation and experiment prove that RNP method is effective on improving flowmeter accuracy,extending measuring range and strengthening anti-interference.更多还原