Patent ID: 8260562

Claim:
A method for generating a drive signal for a vibratory flowmeter ( 5 ), the method comprising: receiving a sensor signal ( 210 ) from the vibratory flowmeter ( 5 ); phase-shifting the sensor signal ( 210 ) substantially 90 degrees to create a phase-shifted sensor signal; determining a sensor signal amplitude ( 214 ) from the sensor signal ( 210 ) and the phase-shifted sensor signal; linearly correlating a frequency response of the sensor signal ( 210 ) to a frequency/phase relationship in order to produce a phase shift value (θ); combining the phase shift value (θ) with the sensor signal ( 210 ) and the phase-shifted sensor signal in order to generate a drive signal phase ( 213 ); and generating a drive signal including a drive signal amplitude ( 215 ) and the drive signal phase ( 213 ), wherein the drive signal phase ( 213 ) is substantially identical to a sensor signal phase ( 212 ).