×

Correction of coriolis flowmeter measurements due to multiphase flows

  • US RE40,095 E1
  • Filed: 05/06/2003
  • Issued: 02/26/2008
  • Est. Priority Date: 09/30/1998
  • Status: Expired due to Term
First Claim
Patent Images

1. A Coriolis flowmeter which measures densities of materials including combinations of gas and liquids, gas and solids, or solids and liquids, said flowmeter comprising:

  • at least one flowtube;

    a driver that vibrates said at least one flowtube at a fundamental frequency based on a drive signal, said fundamental frequency corresponding to a density of material flowing through said at least one flowtube;

    pickoffs affixed to said at least one flowtube that generate pickoff signals responsive to said material flowing through said at least one flowtube; and

    meter electronics configured to;

    determine said density of said material flowing through said at least one flowtube based on at least one of said pickoff signals, monitor a drive gain in said at least one flow tube for a change in value to determine if said material flowing through said at least one flowtube comprises a multiphase flow, and if said material flowing through said at least one flowtube comprises a multiphase flow, then determine said density of said material flowing through said at least one flowtube based on a stored density value.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×