Wet gas measurement
First Claim
Patent Images
1. A flowmeter comprising:
- a vibratable flowtube for containing a multi-phase fluid;
a driver connected to the flowtube and configured to impart motion to the flowtube such that the flowtube vibrates;
a sensor connected to the flowtube and configured to sense the motion of the flowtube and generate a sensor signal indicative of said motion; and
a controller to receive the sensor signal and configured to;
determine an estimated frequency of the sensor signal;
compare the estimated frequency with an expected frequency range;
eliminate a zero offset from the sensor signal when the determined frequency is within the expected frequency range;
determine an amplitude of the sensor signal;
determine a phase of the sensor signal; and
output a drive signal to the driver, the drive signal being determined by the controller using the amplitude and the phase of the sensor signal.
2 Assignments
0 Petitions
Accused Products
Abstract
A multi-phase process fluid is passed through a vibratable flowtube. Motion is induced in the vibratable flowtube. A first apparent property of the multi-phase process fluid based on the motion of the vibratable flowtube is determined, and an apparent intermediate value associated with the multi-phase process fluid based on the first apparent property is determined. A corrected intermediate value is determined based on a mapping between the intermediate value and the corrected intermediate value. A phase-specific property of a phase of the multi-phase process fluid is determined based on the corrected intermediate value.
92 Citations
20 Claims
-
1. A flowmeter comprising:
-
a vibratable flowtube for containing a multi-phase fluid; a driver connected to the flowtube and configured to impart motion to the flowtube such that the flowtube vibrates; a sensor connected to the flowtube and configured to sense the motion of the flowtube and generate a sensor signal indicative of said motion; and a controller to receive the sensor signal and configured to; determine an estimated frequency of the sensor signal; compare the estimated frequency with an expected frequency range; eliminate a zero offset from the sensor signal when the determined frequency is within the expected frequency range; determine an amplitude of the sensor signal; determine a phase of the sensor signal; and output a drive signal to the driver, the drive signal being determined by the controller using the amplitude and the phase of the sensor signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A flowmeter transmitter for use in a flowmeter having a vibratable flowtube containing a multi-phase fluid, a driver connected to the flowtube and configured to impart motion to the flowtube such that the flowtube vibrates, and a sensor connected to the flowtube and configured to sense the motion of the flowtube and generate a sensor signal indicative of said motion, the transmitter comprising a controller configured to:
-
receive the sensor signal; determine an estimated frequency of the sensor signal; compare the estimated frequency with an expected frequency range; eliminate a zero offset from the sensor signal when the determined frequency is within the expected frequency range; determine an amplitude of the sensor signal; determine a phase of the sensor signal; and output a drive signal for the driver, the drive signal being determined by the controller using the amplitude and the phase of the sensor signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification