Drive techniques for a digital flowmeter

Manus Henry; Mayela E.  Zamora

Drive techniques for a digital flowmeter

Manus Henry (Inventor)
, Mayela E. Zamora (Inventor)

University of Oxford

Research output: Patent

Abstract

An optimal mode of operation for the digital flowmeter is selected, depending on a current environment of the flowmeter. For example, during a startup operation of the flowmeter, the mode of operation might include a random sequence mode, in which filtered, random frequencies are applied as a drive signal to a flowtube associated with the digital flowmeter. Once the flowtube reaches a resonant mode of vibration, the digital flowmeter may transition to a positive feedback mode, in which a sensor signal representing a motion of the flowtube is fed back to the flowtube as a drive signal, as part of a feedback loop. Once an oscillation of the flowtube is achieved and analyzed, a digital synthesis mode of operation may be implemented, in which the analyzed sensor signals are used to synthesize the drive signal. In either the positive feedback mode or the digital synthesis mode, the digital flowmeter may revert to a previous mode to regain stable and desired oscillation of the flowtube, such as might be required during a recovery operation associated with a disturbance to an operation of the digital flowmeter.

Original language	English
Patent number	GB2412437B
IPC	G01F 1/00,G01F 1/84,G01F 25/00
Priority date	29/03/02
Filing date	31/03/03
Publication status	Published - 31 May 2006
Externally published	Yes

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Drive techniques for a digital flowmeter
Henry, M. (Inventor) & Zamora, M. E. (Inventor), 21 Apr 2015, IPC No. G01F 1/84, Patent No. US9014997B2, 22 May 2013, Priority date 27 Nov 1996, Priority No. US6655497P
Research output: Patent

Open Access
Drive techniques for a digital flowmeter
Henry, M. (Inventor) & Zamora, M. E. (Inventor), 18 Jun 2013, IPC No. G01F 1/00, G06F 19/00, G01F 1/12, Patent No. US8467986B2, 6 Aug 2010, Priority date 8 Jul 1998, Priority No. US11173998A
Research output: Patent

Open Access
Drive Techniques For A Digital Flowmeter
Henry, M. (Inventor) & Zamora, M. E. (Inventor), 19 Dec 2013, IPC No. G01F 1/84 , Patent No. US2013333484A1, 22 May 2013, Priority date 26 Nov 1997, Priority No. US6655497P
Research output: Patent

Open Access

Cite this

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title = "Drive techniques for a digital flowmeter",

abstract = "An optimal mode of operation for the digital flowmeter is selected, depending on a current environment of the flowmeter. For example, during a startup operation of the flowmeter, the mode of operation might include a random sequence mode, in which filtered, random frequencies are applied as a drive signal to a flowtube associated with the digital flowmeter. Once the flowtube reaches a resonant mode of vibration, the digital flowmeter may transition to a positive feedback mode, in which a sensor signal representing a motion of the flowtube is fed back to the flowtube as a drive signal, as part of a feedback loop. Once an oscillation of the flowtube is achieved and analyzed, a digital synthesis mode of operation may be implemented, in which the analyzed sensor signals are used to synthesize the drive signal. In either the positive feedback mode or the digital synthesis mode, the digital flowmeter may revert to a previous mode to regain stable and desired oscillation of the flowtube, such as might be required during a recovery operation associated with a disturbance to an operation of the digital flowmeter.",

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AB - An optimal mode of operation for the digital flowmeter is selected, depending on a current environment of the flowmeter. For example, during a startup operation of the flowmeter, the mode of operation might include a random sequence mode, in which filtered, random frequencies are applied as a drive signal to a flowtube associated with the digital flowmeter. Once the flowtube reaches a resonant mode of vibration, the digital flowmeter may transition to a positive feedback mode, in which a sensor signal representing a motion of the flowtube is fed back to the flowtube as a drive signal, as part of a feedback loop. Once an oscillation of the flowtube is achieved and analyzed, a digital synthesis mode of operation may be implemented, in which the analyzed sensor signals are used to synthesize the drive signal. In either the positive feedback mode or the digital synthesis mode, the digital flowmeter may revert to a previous mode to regain stable and desired oscillation of the flowtube, such as might be required during a recovery operation associated with a disturbance to an operation of the digital flowmeter.

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Drive techniques for a digital flowmeter

Abstract

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