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AssigneeABB Patent GmbH
InventorsFrank Kassubek, Lothar Deppe, Jörg Gebhardt, René Friedrichs, Steffen Keller
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A method for compensation for influences, which interfere with the measurement accuracy, in measurement devices of the vibration type, comprising a measurement tube through which a fluid medium can flow and which is caused to oscillate mechanically, acting as an oscillation body, by an excitation unit, whose oscillation behavior, which changes as a function of the flowrate and/or the viscosity and/or the density of the fluid medium, is detected by at least one oscillation sensor in order to determine the flowrate, wherein the material strain in the measurement tube is detected by means of at least one sensor, from which an indicator value for the influence causing the material strain is calculated in order to correct the measurement signal, by signal processing, from the indicator value obtained in this way.
A method for correcting a measurement signal by compensating for influences, which interfere with accuracy of the measurement signal, in measurement devices of the vibration type, comprising a measurement tube through which a fluid medium can flow and which is caused to oscillate mechanically, acting as an oscillation body, by an excitation unit, whose oscillation behavior, which changes as a function of flowrate, viscosity or density of the fluid medium, is detected by at least one oscillation sensor in order to determine the flowrate, the viscosity or the density of the fluid medium, wherein an indicator value for an influence causing a material strain in the measurement tube is calculated from the material strain in circumferential direction of the measurement tube by means of at least one sensor, in order to correct the measurement signal, using signal processing, from the indicator value by compensating for inaccuracy of the measurement signal caused by the influence.
A measurement device of the vibration type, having at least one measurement tube, through which a fluid medium can flow and which can be caused to oscillate mechanically by means of an excitation unit, as an oscillation body, whose oscillation behavior, which changes as a function of flowrate, viscosity or density of the fluid medium, can be detected by at least one sensor in order to determine the flowrate, the viscosity, or the density of the fluid medium, and having a device for compensation for influences which interfere with the measurement accuracy, wherein at least one evaluation unit is provided in order to calculate an indicator value for an influence causing a material strain in the measurement tube and to correct measurement signal by compensating for inaccuracy of the measurement signal caused by the influence, using signal processing, from the indicator value, and at least one sensor is provided in order to detect the material strain in the measurement tube.
A device for compensation for influences which interfere with the measurement accuracy of measurement devices of the vibration type, which have at least one measurement tube, through which a fluid medium can flow and which can be caused to oscillate mechanically by means of an excitation unit, as an oscillation body, whose oscillation behavior, which changes as a function of flowrate, viscosity, or density of the fluid medium, can be detected by at least one sensor in order to determine the flowrate, the viscosity, or the density of the fluid medium, wherein at least one evaluation unit is provided in order to calculate an indicator value for an influence causing the material strain and to correct measurement signal by compensating for inaccuracy of the measurement signal caused by the influence, by signal processing, from the indicator value, and wherein at least one sensor is provided in order to detect the material strain in circumferential direction of the measurement tube.
Dependencies are inferred from the claim text.