Viscosity-corrected flowmeter
First Claim
1. A digital flowmeter comprising:
- a vibratable conduit with a mixture of a liquid and a gas flowing therethrough;
a driver connected to the conduit and operable to impart motion to the conduit;
a sensor connected to the conduit and operable to sense the motion of the conduit; and
a digital transmitter connected to the conduit and comprising, a void fraction determination system configured to determine a gas void fraction of the mixture;
a viscosity determination system configured to determine a viscosity of the liquid in the mixture; and
a flow parameter correction system operable to determine a flow parameter associated with the flowing mixture, based on the gas void fraction and the viscosity.
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Accused Products
Abstract
A digital flowmeter can include a vibratable conduit with a mixture of a liquid and a gas flowing therethrough. A driver can be connected to the conduit and can be operable to impart motion to the conduit where a sensor can also be connected and can be operable to sense the motion of the conduit. A digital transmitter can also be connected to the conduit and can include a void fraction determination system configured to determine a gas void fraction of the mixture, a viscosity determination system configured to determine a viscosity of the liquid in the mixture, and a flow parameter correction system operable to determine a flow parameter associated with the flowing mixture, based on the gas void fraction and the viscosity.
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Citations
33 Claims
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1. A digital flowmeter comprising:
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a vibratable conduit with a mixture of a liquid and a gas flowing therethrough;
a driver connected to the conduit and operable to impart motion to the conduit;
a sensor connected to the conduit and operable to sense the motion of the conduit; and
a digital transmitter connected to the conduit and comprising, a void fraction determination system configured to determine a gas void fraction of the mixture;
a viscosity determination system configured to determine a viscosity of the liquid in the mixture; and
a flow parameter correction system operable to determine a flow parameter associated with the flowing mixture, based on the gas void fraction and the viscosity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A digital transmitter comprising:
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a transceiver configured to send signals to, and receive signals from, sensors monitoring a vibrating flowtube and a liquid-gas mixture flowing therein;
an apparent flow parameter determination system to generate apparent flow parameter values of the mixture from the signals; and
a flow parameter correction system operable to correct the apparent flow parameter values, based on a viscosity of the liquid within the liquid-gas mixture. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A method comprising:
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determining an apparent flow parameter of a gas-liquid mixture flowing through a vibrating flowtube;
determining a viscosity of the liquid;
determining a viscosity correction factor;
determining an error in the apparent flow parameter, based upon the viscosity correction factor; and
correcting the error in the apparent flow parameter. - View Dependent Claims (29, 30, 31, 32, 33)
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Specification