Meter Electronics And Methods For Rapidly Determining A Mass Fraction Of A Multi-Phase Fluid From A Coriolis Flow Meter Signal

A method for determining a mass fraction of flow components in a flow material flowing through a flow meter, the method comprising:

• receiving a frequency response of the flow material;
• breaking out the frequency response into at least a gas frequency component and a fluid frequency component;
• determining an overall density from the frequency response;
• determining a gas density from the gas frequency component;
• determining the void fraction of gas from the frequency response and one or more of the gas frequency component and the fluid frequency component;
• and
• determining the mass fraction from the void fraction of gas multiplied by a ratio of the gas density divided by the overall density.

A method for determining a mass fraction of flow components in a flow material flowing through a flow meter, the method comprising:

• receiving a frequency response of the flow material;
• processing the frequency response with a notch filter that substantially rejects one of a gas frequency component and a fluid frequency component;
• determining an overall density from the frequency response;
• determining a gas density from the gas frequency component;
• determining the void fraction of gas from the frequency response and one or more of the gas frequency component and the fluid frequency component;
• and
• determining the mass fraction from the void fraction of gas multiplied by a ratio of the gas density divided by the overall density.

A method for determining a mass fraction of flow components in a flow material flowing through a flow meter, the method comprising:

• receiving a frequency response of the flow material;
• filtering the frequency response with a first filter that substantially rejects the gas frequency component and substantially passes the fluid frequency component, wherein the first filter outputs the fluid frequency component;
• filtering the frequency response with a second filter that substantially rejects the fluid frequency component and substantially passes the gas frequency component, wherein the second filter outputs the gas frequency component;
• determining an overall density from the frequency response;
• determining a gas density from the gas frequency component;
• determining the void fraction of gas from the frequency response and one or more of the gas frequency component and the fluid frequency component;
• and
• determining the mass fraction from the void fraction of gas multiplied by a ratio of the gas density divided by the overall density.