A Verification of Model of Differential Interference Change Based on Actual Electrode Measurement Environment

Abstract

Differential interference will inevitably engender when the electromagnetic flowmeter (EMF) is used to measure liquid flow, values of which are affected by external factors. In order to test how differential interference changes under different external factors, a novel model based on the actual electrode measurement environment is proposed. First, according to the electrode measurement environment, the affect of external factors on the changes of differential interference are analyzed, where the external factors include excitation coil equivalent inductance, electrode lead-out position deviation, liquid conductivity and excitation voltage. Then, a verification model is presented to address the lack of verification of factors related to differential interference changes in the traditional model and theory, and provides an approach to fully obtain its changes. By comparing the differential interference values with the verification model and differential interference values of the actual measurement, the effectiveness of the proposed model in testing the differential interference is demonstrated.