Patent ID: 7065455

Claim:
A flowmeter comprising: a vibratable flowtube; a driver connected to the flowtube and operable to impart motion to the flowtube; a first sensor connected to a first portion of the flowtube and operable to sense a frequency of the motion of the flowtube and generate a first sensor signal; a second sensor connected to a second portion of the flowtube and operable to sense the frequency of the motion of the flowtube and generate a second sensor signal; and a controller operable to adjust the frequency sensed by the sensors based on a phase difference between the first sensor signal and the second sensor signal, to thereby obtain a corrected frequency; wherein the controller is operable to determine a relationship between the frequency and the phase difference, based on a plurality of frequency measurements and corresponding phase difference measurements, the relationship being determined using at least one of a linear regression and/or a quadratic fit based on the frequency measurements and phase difference measurements.