Signal processing precision of Coriolis mass flowmeters affects the measurement accuracy directly. To improve the measurement accuracy of Coriolis mass flowmeters, a phase and frequency matching-based signal processing method for Coriolis mass flowmeters is proposed. Estimated phase difference is obtained by means of frequency estimation, 90° phase shift, generating reference signals and cross-correlation. Simulated results demonstrate that the proposed method has better phase difference estimation and anti-interference performance than the Hilbert transform method, cross-correlation method, data extension-based correlation method, and quadrature delay estimator. Measurement results of Coriolis mass flowmeters verify the effectiveness and superiority of the proposed method in practice.
If the inline PDF is not rendering correctly, you can download the PDF file here.
 Hou Q. Xu K. Fang M. Liu C. Xiong W. (2013). Development of Coriolis mass flowmeter with digital drive and signal processing technology. ISA Transactions 52 (5) 692-700.
 Svete A. Kutin J. Bobovnik G. Bajsić I. (2015). Theoretical and experimental investigations of flow pulsation effects in Coriolis mass flowmeters. Journal of Sound and Vibration 352 30-45.
 Shanmugavalli M. Umapathy M. Uma G. (2010). Smart Coriolis mass flowmeter. Measurement 43 (4) 549-555.
 Romano P. (1990). Coriolis mass flow rate meter having a substantially increased noise immunity. US Patent 4934196.
 Assous S. Linnett L. (2012). High resolution time delay estimation using sliding discrete Fourier transform. Digital Signal Processing 22 (5) 820-827.
 Shaswary E. Tavakkoli J. Xu Y. (2015). A new algorithm for time-delay estimation in ultrasonic echo signals. IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control 62 (1) 236-241.
 Ren H. Yin W. Hu F. (2010). Contrast and analysis of three measuring methods for phase difference based on labview. Science Technology and Engineering 10 (1) 263-268.
 Li J. Zhao P. Hou W. Zheng B. Zheng H. (2009).
Research on error of phase difference algorithm based on correlation theory. Journal of North University of China 30 (6) 616-619.
 Shen T. Tu Y. Li M. Zhang H. (2014). Research and validation on improved correlation method for phase difference measurement based on data extension. Chinese Journal of Scientific Instrument 35 (6) 1331-1337.
 Yang H. Tu Y. Zhang H. Yi P. (2012). Phase difference measuring method based on SVD and Hilbert transform for Coriolis mass flowmeter. Chinese Journal of Scientific Instrument 33 (9) 2101-2107.
 Liu W. Zhao L. Wang K. Feng Z. Long Q. (2013). Signal processing for Coriolis mass flowmeter based on Hilbert transform. Acta Metrologica Sinica 34 (5) 446-451.
 Tu Y. Yang H. Zhang H. Liu X. (2014). CMF signal processing method based on feedback corrected ANF and Hilbert transformation. Measurement Science Review 14 (1) 41-47.
 Vučijak N.M. Saranovac L.V. (2010). A simple algorithm for the estimation of phase difference between two sinusoidal voltages. IEEE Transactions on Instrumentation and Measurement 59 (12) 3152-3158.
 Maskell D.L. Woods G.S. (2005). Adaptive subsample delay estimation using a modified quadrature phase detector. IEEE Transactions on Circuits and Systems II: Express Briefs 52 (10) 669-674.
 So H.C. (2005). A comparative study of two discretetime phase delay estimators. IEEE Transactions on Instrumentation and Measurement 54 (6) 2501-2504.