计算机工程与应用2013，Vol.49Issue(5)：236-240,5.DOI:10.3778/j.issn.1002-8331.1207-0236
插值FFT和滑动DTFT的科氏流量计信号处理方法
Signal processing method of Coriolis mass flowmeter based on interpolation FFT and sliding DTFT
摘要
Abstract
Coriolis flowmeter measures mass flow by computing the time difference of two sinusoidal signals outputted with the same frequency by its primary instrument. It is crucial to estimate the frequency and phase difference of the two signals accurately and real-time in the digital signal processing of Coriolis flowmeter. Using the actual Coriolis flowmeter signals collected, it presents a method to calculate time difference which based on interpolation FFT for frequency estimation and through improved sliding DTFT considering negative frequency for phase difference estimation. This method balances high precision with computational efficiency. Contrast experiment verifies the availability and advantage of this method.关键词
科氏流量计/数字信号处理/插值快速傅里叶变换(FFT)/滑动离散时间傅里叶变换(DTFT)/相位差Key words
Coriolis mass flowmeter/digital signal processing/interpolation Fast Fourier Transform (FFT)/sliding Discrete Time Fourier Transform (DTFT)/phase difference分类
机械制造引用本文复制引用
易鹏,涂亚庆,杨辉跃..插值FFT和滑动DTFT的科氏流量计信号处理方法[J].计算机工程与应用,2013,49(5):236-240,5.基金项目
国家自然科学基金(No.60871098,No.61271449) （No.60871098,No.61271449）
重庆市自然科学基金(No.CSTC2011BA2015). （No.CSTC2011BA2015）
