Electromagnetic flowmeter calibration method and device

An electromagnetic flowmeter calibration device, comprising:

• a measured flow rate acquisition module, configured to measure, in a case that a fluid flows through a through-flow pipeline of an electromagnetic flowmeter, a flow rate of the fluid flowing through the through-flow pipeline using the electromagnetic flowmeter to obtain a measured flow rate;
• a microelement induced voltage acquisition module, configured to measure induced voltages of various section microelements in a section microelement matrix of a cross section of the through-flow pipeline using an electrode array arranged around the cross section of the through-flow pipeline to obtain a plurality of microelement induced voltages, the section microelement matrix of the cross section of the through-flow pipeline comprising a plurality of section microelements obtained by dividing the cross section of the through-flow pipeline;
• a flow pattern recognition module, configured to perform feature extraction on the plurality of microelement induced voltages to obtain an input feature of a fluid flow pattern recognition model, and recognize a flow pattern of the fluid using the fluid flow pattern recognition model according to the input feature;
• and
• a calibration module, configured to calculate a flow rate of the fluid flowing through the through-flow pipeline according to the flow pattern of the fluid to obtain a standard flow rate, and calibrate a meter coefficient of the electromagnetic flowmeter according to the standard flow rate and the measured flow rate.