Drive techniques for a digital flowmeter

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

Research output: Patent

Abstract

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 numberGB2402486
IPCG01F 25/ 00 A I
Priority date31/03/03
Filing date31/03/03
Publication statusPublished - 8 Dec 2004
Externally publishedYes

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  • Cite this

    Henry, M., & Zamora, M. E. (2004). IPC No. G01F 25/ 00 A I. Drive techniques for a digital flowmeter. (Patent No. GB2402486).