Signal Processing Method of Harmonic Analysis Slurry Electromagnetic Flowmeter Based on Walsh Transform

Aiming at the problems that the traditional electromagnetic flowmeter mostly adopts the low-frequency rectangular wave excitation method to measure the slurry flow and the measurement is unstable, a signal processing method-Walsh transform suitable for this excitation method is proposed. This paper verifies the feasibility and practical effect of the signal processing method based on Walsh transform through experiments. Experiments show that under the premise of ensuring the same low frequency excitation, the Walsh harmonic analysis method can overcome the slurry noise to a certain extent. It provides a new idea and theoretical basis for the harmonic analysis method of slurry type electromagnetic flowmeter.