METHOD FOR DETERMINING THE VOLUME FLOW RATE OR MASS FLOW RATE OF A MEDIUM

摘要

The invention relates to a method for determining the volume flow rate or mass flow rate of a medium (3) in a pipe (3) or a test tube having a radius (r) via a harmonic excitation process. According to said method, ultrasonic test signals are transmitted and/or received along several defined sound paths (m). Different successive flow profiles (v(r)) of a measured medium (2) are embodied in the pipe (3) or test tube during a calibration phase, a defined volume flow rate or a defined mass flow rate is determined for each flow profile (v(r)), each flow profile (v(r)) embodied in the pipe (3) or test tube is described by a characteristic parameter set (^a