The Modeling of Electromagnetic Flow Meter's Original Signals

Given a model about the signal between electromagnetic flowmeters' poles,which contains useful signal and several disturb signals,two of the main disturb signals are mainly talked about,which is differential interference and in-phase interference.The voltage between the electrodes multiplies with excitation voltage and the signal UO is gotten.There are two parts consist of UO: DC signal and AC signals.This DC signal is useful signal,which is linear relationship with pipe flow velocity signal,so it is the signal that we want.Through this way the interferent signals are separated from original signals,and practical circuit proves that this method is effective.