Apparatus and method for compensating a coriolis meter
First Claim
1. An apparatus for measuring density of an aerated fluid flowing in a pipe;
- the system comprising;
a meter having at least one vibratable tube wherein the fluid flows therethrough, the meter providing a natural frequency signal indicative of a natural frequency of the at least one vibratable tube;
a device having at least one sensor disposed at the pipe or the at least one tube to measure the speed of sound propagating through the fluid, the device providing an SOS signal indicative of the speed of sound propagating through the fluid; and
a processing unit to determine a density signal indicative of the density of the non-gaseous portion of the aerated fluid in response to the natural frequency signal and the SOS signal.
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Accused Products
Abstract
A flow measuring system is provided that provides at least one of a compensated mass flow rate measurement and a compensated density measurement. The flow measuring system includes a gas volume fraction meter in combination with a coriolis meter. The GVF meter measures acoustic pressures propagating through the fluids to measure the speed of sound αmix propagating through the fluid to calculate at least gas volume fraction of the fluid and/or the reduced natural frequency. For determining an improved density for the coriolis meter, the calculated gas volume fraction and/or reduced frequency is provided to a processing unit. 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. The gas volume fraction (GVF) meter may include a sensing device having a plurality of strain-based or pressure sensors spaced axially along the pipe for measuring the acoustic pressures propagating through the flow.
173 Citations
64 Claims
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1. An apparatus for measuring density of an aerated fluid flowing in a pipe;
- the system comprising;
a meter having at least one vibratable tube wherein the fluid flows therethrough, the meter providing a natural frequency signal indicative of a natural frequency of the at least one vibratable tube; a device having at least one sensor disposed at the pipe or the at least one tube to measure the speed of sound propagating through the fluid, the device providing an SOS signal indicative of the speed of sound propagating through the fluid; and a processing unit to determine a density signal indicative of the density of the non-gaseous portion of the aerated fluid in response to the natural frequency signal and the SOS signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- the system comprising;
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17. A method of measuring density of an airated fluid flowing in a pipe;
- the method comprising;
providing a natural frequency signal indicative of a natural frequency of at least one vibratable tube; providing an SOS signal indicative of the speed of sound propagating through the fluid; and determining a density signal indicative of the density of the non-gaseous portion of the aerated fluid in response to the natural frequency signal and the SOS signal. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 51, 52, 53, 54, 55, 56, 57, 62, 63)
- the method comprising;
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34. An apparatus for measuring mass flow rate of a fluid flowing in a pipe;
- the system comprising;
a meter having at least two vibratable tubes wherein the fluid flows therethrough, the meter providing a phase signal indicative of a phase difference between the at least two vibratable tubes; a device having at least one sensor disposed at the pipe or the at least one tube to measure the speed of sound propagating through the fluid, the device providing at least one of an SOS signal indicative of the speed of sound propagating through the fluid; and a processing unit to determine a mass flow rate signal indicative of the mass flow rate of a non-gaseous portion of the fluid in response to the phase signal and the SOS signal.
- the system comprising;
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49. A method of measuring mass flow rate of an aerated fluid flowing in a pipe;
- the method comprising;
providing a phase signal indicative of the phase difference between at least two vibratable tubes; providing an SOS signal indicative of the speed of sound propagating through the fluid; and determining a mass flow rate signal indicative of the mass flow rate of the non-gaseous portion of the aerated fluid in response to the phase signal and the SOS signal. - View Dependent Claims (58, 59, 60, 61, 64)
- the method comprising;
Specification