Digital flowmeter
DC CAFCFirst Claim
1. A controller for a flowmeter comprising:
- an input module operable to receive a sensor signal from a sensor connected to a vibratable flowtube, the sensor signal related to a fluid flow through the flowtube;
a signal processing system operable to receive the sensor signal, determine sensor signal characteristics, and output drive signal characteristics for a drive signal applied to the flowtube;
an output module operable to output the drive signal to the flowtube;
a control system operable to modify the drive signal and thereby maintain oscillation of the flowtube during a transition of the flowtube from a substantially empty state to a substantially full state; and
wherein the control system is further operable to modify the drive signal and thereby maintain oscillation of the flowtube while separate batches of the fluid flow are processed through the flowtube, wherein the flowtube is substantially empty in between the separate batches.
3 Assignments
Litigations
1 Petition
Accused Products
Abstract
A controller for a flowmeter includes an input module operable to receive a sensor signal from a sensor connected to a vibratable flowtube. The sensor signal is related to a fluid flow through the flowtube. The controller also includes a signal processing system operable to receive the sensor signal, determine sensor signal characteristics, and output drive signal characteristics for a drive signal applied to the flowtube. An output module is operable to output the drive signal to the flowtube and a control system is operable to modify the drive signal and thereby maintain oscillation of the flowtube during a transition of the flowtube from a substantially empty state to a substantially full state.
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Citations
9 Claims
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1. A controller for a flowmeter comprising:
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an input module operable to receive a sensor signal from a sensor connected to a vibratable flowtube, the sensor signal related to a fluid flow through the flowtube; a signal processing system operable to receive the sensor signal, determine sensor signal characteristics, and output drive signal characteristics for a drive signal applied to the flowtube; an output module operable to output the drive signal to the flowtube; a control system operable to modify the drive signal and thereby maintain oscillation of the flowtube during a transition of the flowtube from a substantially empty state to a substantially full state; and wherein the control system is further operable to modify the drive signal and thereby maintain oscillation of the flowtube while separate batches of the fluid flow are processed through the flowtube, wherein the flowtube is substantially empty in between the separate batches. - View Dependent Claims (2, 3, 4)
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5. A method for operating a flowmeter comprising:
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maintaining oscillation of a flowtube associated with the flowmeter during a substantially empty state of the flowtube; maintaining oscillation of the flowtube during an onset of fluid flow through the flowtube; determining, based on sensor signals from a sensor connected to the flowtube, a property of the fluid flow; and maintaining oscillation of the flowtube while separate batches of the fluid flow are processed through the flowtube, wherein the flowtube is substantially empty in between the separate batches. - View Dependent Claims (6, 7)
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8. A Coriolis effect flowmeter comprising:
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a vibratable flowtube; at least one sensor coupled to the vibratable flowtube; an input module operable to receive a sensor signal from the sensor, the sensor signal related to a fluid flow through the flowtube; a signal processing system operable to receive the sensor signal, determine sensor signal characteristics, and output drive signal characteristics for a drive signal applied to the flowtube; an output module operable to output the drive signal to the flowtube; a control system operable to modify the drive signal and thereby maintain oscillation of the flowtube during a transition from a first state in which the flowtube is substantially empty of liquid to a second state in which the flowtube is substantially full of liquid; and wherein the control system is further operable to modify the drive signal and thereby maintain oscillation of the flowtube while separate batches of the fluid flow are processed through the flowtube, wherein the flowtube is substantially empty in between the separate batches. - View Dependent Claims (9)
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Specification