The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 12, 2021
Filed:
Jul. 27, 2015
Micro Motion, Inc., Boulder, CO (US);
Matthew Joseph Rensing, Cincinnati, OH (US);
Micro Motion, Inc., Boulder, CO (US);
Abstract
A method is provided comprising the steps of exciting a vibration mode of a flow tube ('), wherein first and second drivers (L,R) are amplitude modulated out of phase from each other, and wherein a drive command provided to the first and second drivers (L,R) comprises a sum of N+1 independent signals. The first and second drivers (L,R) are excited with a plurality of off-resonance frequencies and the effective phase between a modal response and the drivers (L,R) at each of the off-resonance frequencies is inferred. A left eigenvector phase estimate is generated for each of the off-resonance frequencies. A phase of a left eigenvector at a resonant drive frequency is estimated based on off-resonance frequency phase estimates. The method also comprises measuring the phase between a first pickoff (L) and a second pickoff (R) and determining a phase of a right eigenvector for the flow tube (′).