Correcting for two-phase flow in a digital flowmeter
First Claim
1. A flowmeter controller comprising one or more processing devices configured to:
- receive sensor signals from a sensor that is connected to a vibratable flowtube for detecting motion of the vibratable flowtube as fluid flows through the flowtube;
determine an apparent flow condition of a two-phase fluid mixture flowing through the conduit using characteristics of the sensor signal;
determine an actual flow condition of the two-phase mass flow based on said apparent flow condition and an application of an error correction factor to the apparent flow condition;
determine drive signal characteristics for a drive signal to be applied to a driver connected to the vibratable flowtube for driving movement of the flowtube; and
output the drive signal.
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Accused Products
Abstract
A flowmeter is disclosed. The flowmeter includes a vibratable conduit, and a driver connected to the conduit that is operable to impart motion to the conduit. A sensor is connected to the conduit and is operable to sense the motion of the conduit and generate a sensor signal. A controller is connected to receive the sensor signal. The controller is operable to detect a single-phase flow condition and process the sensor signal using a first process during the single-phase flow condition to generate a validated mass-flow measurement. The controller is also operable to detect a two-phase flow condition and process the sensor signal using a second process during the two-phase flow condition to generate the validated mass-flow measurement.
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Citations
14 Claims
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1. A flowmeter controller comprising one or more processing devices configured to:
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receive sensor signals from a sensor that is connected to a vibratable flowtube for detecting motion of the vibratable flowtube as fluid flows through the flowtube; determine an apparent flow condition of a two-phase fluid mixture flowing through the conduit using characteristics of the sensor signal; determine an actual flow condition of the two-phase mass flow based on said apparent flow condition and an application of an error correction factor to the apparent flow condition; determine drive signal characteristics for a drive signal to be applied to a driver connected to the vibratable flowtube for driving movement of the flowtube; and output the drive signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification