Apparatus and method for augmenting a coriolis meter
First Claim
1. A correction system for correcting a coriolis output signal of a coriolis meter, the correction system comprising:
- a flow measuring device measuring the speed of sound propagating through a fluid passing through the coriolis meter, the measuring device providing a correction signal in response to the measured speed of sound; and
a processing unit providing a corrected coriolis output signal responsive to the coriolis output signal and the correction signal, and a compositional signal that is indicative of a parameter for one phase of a multiphase fluid, which compositional signal is a function of the corrected coriolis output signal.
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Abstract
A correction system provides at least one of a compensated mass flow rate measurement and a compensated density measurement of a coriolis meter. The correction system includes a gas volume fraction (GVF) meter, which may include an array of strained-based or pressure sensors, to measure the speed of sound propagating through the fluid passing through the coriolis meter to calculate at least the GVF of the fluid and/or the reduced natural frequency. The calculated gas volume fraction and/or reduced frequency is provided to a processing unit for determining an improved mass flow rate and/or density for the coriolis meter. The improved density is determined using analytically derived or empirically derived density calibration models (or formulas derived therefore), which is a function of the measured natural frequency and at least one of the determined GVF, reduced frequency and speed of sound, or any combination thereof.
105 Citations
17 Claims
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1. A correction system for correcting a coriolis output signal of a coriolis meter, the correction system comprising:
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a flow measuring device measuring the speed of sound propagating through a fluid passing through the coriolis meter, the measuring device providing a correction signal in response to the measured speed of sound; and a processing unit providing a corrected coriolis output signal responsive to the coriolis output signal and the correction signal, and a compositional signal that is indicative of a parameter for one phase of a multiphase fluid, which compositional signal is a function of the corrected coriolis output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for correcting a coriolis output signal of a coriolis meter, the method comprising:
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measuring the speed of sound propagating through a fluid passing through the coriolis meter; providing a correction signal in response to the measured speed of sound; determining a corrected coriolis output signal in response to the coriolis output signal and the correction signal; and determining a compositional signal from the corrected coriolis output signal, which compositional signal is indicative of a parameter for one phase of a multiphase fluid. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification