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《Chinese Journal of Sensors and Actuators》 2006-06
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DFT in the Research of Phase Difference Measurement in Coriolis Mass Flow Meter

YANG Jun*,GUAN Ke,LIANG Jia(School of Information Technology,Chang'an University,Xi'an 710064,China)  
A new algorithm based on DFT is proposed for Coriolis Mass Flow meter(CMF)phase measurment.Primarily,this paper analyzed a diversification caused by nonsynchronism sampling in theory and introduced a technique by means of phase change to modify the calculating sampling point.This method applied for adjusting the sampling point to approach a synchronism and get a precise result of phase calculation.After the simulation,we can conclude that it is a feasible method to track the frequency and eliminates error caused by frequency change,and improves tracking precision.
【CateGory Index】: TH814
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