Determining a liquid flow fraction in a gas flow material by computing a frequency response to a phase shift of a sensor signal

摘要

Disclosed is meter electronics (20) for determining a liquid flow fraction in a gas flow material flowing through a flow meter (5) having one or more oscillating flow tubes. The electronics include an interface and a processing system. The interface is for receiving first and second sensor signals that represent the oscillating motion of the flow tubes at different points. The processing system receives the signals, generates a 90 degree phase shift from the first signal, computes a frequency response using the phase shift and the first signal, determines a flow stream density of the material, and determines the fraction from the flow stream density.