Study on the Static and Dynamic Characteristics of Vortex Electric Field in Electromagnetic Flowmeter and its Role in Attenuating Slurry Noise

Electromagnetic flowmeter (EMF) as one of the most suitable for measuring slurry fluid flowmeter, how to reduce the slurry noise in slurry measurement has become an important research hotspot. EMF in the process of magnetic field switching will generate vortex electric field, vortex electric field can effectively overcome the slurry noise. In this paper, the vortex electric field in EMF is studied in depth, first of all, the mechanism of vortex electric field attenuating slurry noise is studied, and the effect of vortex electric field on charged ions in EMF pipeline is analyzed; the vortex electric field generated under different excitation current size and different slope of excitation current change, i.e., the static and dynamic characteristics of vortex electric field is analyzed; the software and hardware system of vortex electric field static and dynamic characteristics experiment is designed, and the experiments to investigate the ability of vortex electric field static dynamic characteristics to attenuate slurry noise were conducted. The experimental results show that the real influence on the strength of the vortex electric field is the slope of the change of the excitation current, and the larger the slope of the excitation current change, the stronger the ability to attenuate the slurry noise, and the vortex electric field produced by different excitation current size has basically the same ability to attenuate the slurry noise.