Detecting an inaccurate flow rate measurement by a vibratory meter
AssigneeMicro Motion, Inc.
InventorsPatrick John Zimmer, Craig Andrew Riggins
Life of this patent
Estimating the term…
Abstract
A method of detecting an inaccurate flow rate measurement by a vibratory meter is provided. The method includes flowing fluid through the vibratory meter and measuring a flow rate and a density of the fluid with the vibratory meter, and calculating a density change rate of the fluid. The method also includes determining if the measured flow rate is inaccurate based on a comparison between the measured density and a density reference, and a comparison between the density change rate and a density change rate reference.
Claims20
A method of detecting an inaccurate flow rate measurement by a vibratory meter, the method comprising:
- flowing fluid through the vibratory meter and measuring a flow rate and a density of the fluid with the vibratory meter;
- calculating a density change rate of the fluid;
- and
- determining that the measured flow rate is inaccurate based on:
- a comparison between the measured density and a density reference;
- and
- a comparison between the density change rate and a density change rate reference.
An apparatus for detecting an inaccurate flow rate measurement by a vibratory meter (5), the apparatus comprising:
- a meter assembly (10) configured to receive at least one signal representing at least one measurement of a vibratory response;
- a meter electronics (20) communicatively coupled to the meter assembly (10), the meter electronics (20) configured to determine a measured flow rate and a measured density from the at least one signal representing at least one measurement of a vibratory response;
- and
- a processing system (910) of the meter electronics (20), the processing system (910) being configured to:
- calculate a density change rate of the fluid;
- and
- determine if the measured flow rate is inaccurate based on:
- a comparison between the measured density and a density reference;
- and
- a comparison between the density change rate and a density change rate reference.
Dependencies are inferred from the claim text.