| 摘要 |
A meter electronics ( 20 ) for generating a drive signal for a vibratory flowmeter ( 5 ) is provided according to an embodiment of the invention. The meter electronics includes an interface ( 201 ) and a processing system ( 203 ). The processing system is configured to receive the sensor signal ( 201 ) through the interface, phase-shift the sensor signal ( 210 ) substantially 90 degrees to create a phase-shifted sensor signal, determine a phase shift value from a frequency response of the vibratory flowmeter, and combine the phase shift value with the sensor signal ( 201 ) and the phase-shifted sensor signal in order to generate a drive signal phase ( 213 ). The processing system is further configured to determine a sensor signal amplitude ( 214 ) from the sensor signal ( 210 ) and the phase-shifted sensor signal, and generate a drive signal amplitude ( 215 ) based on the sensor signal amplitude ( 214 ), wherein the drive signal phase ( 213 ) is substantially identical to a sensor signal phase ( 212 ).
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