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Correcting for two-phase flow in a digital flowmeter

  • US 20040206189A1
  • Filed: 04/26/2004
  • Published: 10/21/2004
  • Est. Priority Date: 03/23/2000
  • Status: Active Grant
First Claim
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1. A flowmeter controller comprising:

  • an input module operable to receive sensor signals from a sensor connected to a vibratable flowtube, the sensor signals related to a mass flow through the flowtube, wherein the mass flow includes a first material having a first phase and a second material having a second phase;

    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, the drive signal characteristics including a drive gain necessary to maintain oscillation of the flowtube during the mass flow;

    a measurement system operable to determine an actual flow condition of the mass flow, based on an apparent flow condition derived from the sensor signal characteristics; and

    an output module operable to output the drive signal.

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