Correcting for two-phase flow in a digital flowmeter
First Claim
1. A system comprising:
- a vibratable conduit;
a driver connected to the conduit and configured to impart motion to the conduit;
a sensor connected to the conduit and configured to sense the motion of the conduit and generate a sensor signal; and
a controller connected to receive the sensor signal, the controller being configured to;
generate a raw mass-flow measurement from the sensor signal;
generate an observed density measurement from the sensor signal;
detect a single-phase flow condition and process the raw mass-flow measurement using a first process during the single-phase flow condition to generate a first mass-flow measurement; and
detect a two-phase flow condition and using a second process during the two-phase flow condition to generate a second mass-flow measurement, wherein the second process includes (i) generating an error correction factor based, at least in part, on the raw mass-flow measurement and the observed density measurement and (ii) correcting the raw mass-flow measurement using the error correction factor.
2 Assignments
0 Petitions
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.
109 Citations
21 Claims
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1. A system comprising:
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a vibratable conduit; a driver connected to the conduit and configured to impart motion to the conduit; a sensor connected to the conduit and configured to sense the motion of the conduit and generate a sensor signal; and a controller connected to receive the sensor signal, the controller being configured to; generate a raw mass-flow measurement from the sensor signal; generate an observed density measurement from the sensor signal; detect a single-phase flow condition and process the raw mass-flow measurement using a first process during the single-phase flow condition to generate a first mass-flow measurement; and detect a two-phase flow condition and using a second process during the two-phase flow condition to generate a second mass-flow measurement, wherein the second process includes (i) generating an error correction factor based, at least in part, on the raw mass-flow measurement and the observed density measurement and (ii) correcting the raw mass-flow measurement using the error correction factor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A flowmeter transmitter comprising:
one or more processing devices configured to; impart motion to a vibratable conduit using a driver connected to the conduit; receive a sensor signal from a sensor connected to the conduit and configured to sense the motion of the conduit and generate the sensor signal; generate a raw mass-flow measurement from the sensor signal; generate an observed density measurement from the sensor signal; detect a single-phase flow condition and process the raw mass-flow measurement using a first process during the single-phase flow condition to generate a first mass-flow measurement; and detect a two-phase flow condition and using a second process during the two-phase flow condition to generate a second mass-flow measurement, wherein the second process includes (i) generating an error correction factor based, at least in part, on the raw mass-flow measurement and the observed density measurement and (ii) correcting the raw mass-flow measurement using the error correction factor. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method comprising:
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imparting motion to a vibratable conduit using a driver connected to the conduit; receiving a sensor signal from a sensor connected to the conduit and configured to sense the motion of the conduit and generate the sensor signal; generating a raw mass-flow measurement from the sensor signal; generating an observed density measurement from the sensor signal; detecting a single-phase flow condition and process the raw mass-flow measurement using a first process during the single-phase flow condition to generate a first mass-flow measurement; and detecting a two-phase flow condition and using a second process during the two-phase flow condition to generate a second mass-flow measurement, wherein the second process includes (i) generating an error correction factor based, at least in part, on the raw mass-flow measurement and the observed density measurement and (ii) correcting the raw mass-flow measurement using the error correction factor. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification