Endress + Hauser Flowtec Ag

Paul Logue

Jerry E Stevens

A Coriolis flowmeter having an improved measurement accuracy, especially in measurement applications, where conventional Coriolis flowmeter may have a reduced accuracy due to erroneous flow spiking or outputs during no-flow situations is described, comprising: a measurement tube (), a driver () for imparting a force proportional to an applied excitation signal to the measurement tube () for setting the measurement tube () into an oscillatory motion, motion sensors () for measuring the motion of the measurement tube (), an excitation signal generator, for generating the excitation signal to be supplied to the driver () based on the measurement signals derived by the motion sensors (), means () for monitoring the excitation signal or a damping-coefficient of a damping of the measurement tube () and for determining whether an amplitude (A) of the excitation signal or the damping coefficient exceeds an application-specific range, and means for determining a corrected flow (F) of a fluid through the measurement tube (), wherein the corrected flow (F) is determined based on measurement signals derived by the motion sensors (), when the excitation signal or the damping coefficient has an amplitude, that lies within the application-specific range and wherein the corrected flow (F) is set to an application-specific flow, when the excitation signal or the damping coefficient has an amplitude, that exceeds the application-specific range.

Coriolis flowmeter

A Coriolis flowmeter having an improved measurement accuracy, especially in measurement applications, where conventional Coriolis flowmeters may have a reduced accuracy due to erroneous flow spiking or outputs during no-flow situations is described, comprising: a measurement tube, a driver for imparting a force proportional to an applied excitation signal to the measurement tube for setting the measurement tube into an oscillatory motion, motion sensors for measuring the motion of the measurement tube, an excitation signal generator, for generating the excitation signal to be supplied to the driver based on the measurement signals derived by the motion sensors, means for monitoring the excitation signal or a damping-coefficient of a damping of the measurement tube and for determining whether an amplitude (A) of the excitation signal or the damping coefficient exceeds an application-specific range, and means for determining a corrected flow (F) of a fluid through the measurement tube, wherein the corrected flow (F) is determined based on measurement signals derived by the motion sensors, when the excitation signal or the damping coefficient has an amplitude, that lies within the application-specific range and wherein the corrected flow (F) is set to an application-specific flow, when the excitation signal or the damping coefficient has an amplitude, that exceeds the application-specific range.

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Indianapolis, IN, United States of America

Paul Logue