Drive Techniques For A Digital Flowmeter

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

Research output: Patent


Drive techniques for a digital flowmeter are described. The drive techniques account for delays caused during digital signal processing of sensor signals that correspond to a motion of a flowtube, as well as drive signals that impart motion to the flowtube. Such delays may be caused by a variety of factors, including delays associated with analog/digital conversion of the signals and/or filtering of the signals. The techniques include open-loop techniques and closed-loop techniques, which can be used separately or together during the start-up and operation of the digital flowmeter. Startup and operational techniques for a digital flowmeter also are described. The startup and operational techniques select an optimal mode of operation for the digital flowmeter, depending on a current environment of the flowmeter, where the mode of operation might be chosen from, for example, a random sequence mode, a positive feedback mode, or a digital synthesis mode. 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 languageEnglish
Patent numberWO03106931
IPCG01F 25/ 00 A I
Priority date28/03/03
Filing date31/03/03
Publication statusPublished - 24 Dec 2003
Externally publishedYes


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  • Drive Techniques For A Digital Flowmeter

    Henry, M. & Zamora, M. E., 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

  • Drive techniques for a digital flowmeter

    Henry, M. & Mayela, E. Z., 17 Jan 2007, IPC No. G01F 1/84, Patent No. GB2428090B, 31 Mar 2003, Priority date 29 Mar 2002, Priority No. US36815302P

    Research output: Patent

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