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.
4 Assignments
0 Petitions
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
40 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, wherein the apparent flow parameter values reflect an apparent density or an apparent mass flow rate of the mixture; 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, 39, 40)
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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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34. A digital transmitter comprising:
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at least one processing device, the processing device configured to perform the following operations; determine an apparent flow parameter of a gas-liquid mixture flowing through a vibrating flowtube; determine a viscosity of the liquid; determine a viscosity correction factor; determine an error in the apparent flow parameter, based upon the viscosity correction factor; and correct the error in the apparent flow parameter. - View Dependent Claims (35, 36, 37, 38)
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Specification