Differential Interference Compensation System of Electromagnetic Flowmeter Based on Quadratic Difference

The traditional capacitive electromagnetic flow transmitter has the problems of serious differential interference and low signal-to-noise ratio, which seriously affect the measurement accuracy of the system. Aiming at this problem, a differential signal differential cancellation scheme for electromagnetic flow signal acquisition is proposed. The basic circuit structure and interference cancellation algorithm of differential interference differential cancellation system are introduced, and the system error performance is analyzed The experiment shows that the system can effectively improve the anti-interference performance and measurement accuracy of electromagnetic flowmeter.