METHOD FOR OPERATING A CORIOLIS MEASUREMENT DEVICE

    公开(公告)号:US20240344870A1

    公开(公告)日:2024-10-17

    申请号:US18294811

    申请日:2022-07-22

    IPC分类号: G01F1/84 G01N9/32

    摘要: A method for operating a Coriolis measurement device comprises: recording the measured voltages from the sensors and creating an asymmetric sequence of values using the amplitudes of the measured voltages for the purpose of diagnosing the Coriolis measurement device; checking whether the asymmetric sequence of values satisfies at least one invalidity criterion; and creating a stabilized asymmetric sequence of values on the basis of the asymmetric sequence of values by replacing asymmetric measured values with substitute values. While an invalidity criterion is satisfied a last valid measured value of the asymmetric sequence of values is used as the current value of the stabilized asymmetric sequence of values, or the stabilized asymmetric sequence of values is set to a predetermined value, a first invalidity criterion being based on a scattering parameter of the asymmetric value exceeding a first limit value.

    Method for monitoring a flow of a medium by means of a Coriolis mass flowmeter and a differential pressure measurement device

    公开(公告)号:US12044559B2

    公开(公告)日:2024-07-23

    申请号:US17758082

    申请日:2020-12-01

    IPC分类号: G01F1/34 G01F1/84

    CPC分类号: G01F1/34 G01F1/8477

    摘要: A method for monitoring flow of a medium by means of a pressure difference measuring device and a Coriolis mass flowmeter having two oscillators, which comprise, in each case, a bent measuring tube pair, which are arranged on top of one another and connected for parallel flow between the two pressure measuring points of the pressure difference measuring device, comprising steps as follows: Registering a pressure difference between the first pressure measuring point and the second pressure measuring point; registering a first density measured value based on at least a first oscillation frequency of the first oscillator; registering a second density measured value based on at least a second oscillation frequency of the second oscillator; ascertaining a flow measured value based on the pressure difference, when a difference between the first density measured value and the second density measured value is less than a density difference limit value.

    DENSITY METER HAVING AT LEAST ONE MEASURING TUBE, AND METHOD FOR OPERATING AND METHOD FOR ADJUSTING A DENSITY METER OF THIS TYPE

    公开(公告)号:US20240210295A1

    公开(公告)日:2024-06-27

    申请号:US18555387

    申请日:2021-03-21

    发明人: Hao Zhu Alfred Rieder

    IPC分类号: G01N9/00

    CPC分类号: G01N9/002 G01N2009/006

    摘要: A method for operating a density meter that includes at least one oscillating measuring tube for conducting a medium, an exciter disposed on the measuring tube for exciting oscillation modes of the at least one measuring tube, and a support body, wherein the measuring tube has inlet-side and outlet-side end portions that are connected to the support body, includes: exciting at least three oscillation modes of the measuring tube; determining eigenfrequency measurement values of the at least three oscillation modes; determining a density measurement value of the medium, taking into consideration a gas load that may be present; and determining a characteristic property of the at least one measuring tube on the basis of the eigenfrequencies of the three oscillation modes.

    Measurement pickup for determining the mass flow rate of a liquid

    公开(公告)号:US11788875B2

    公开(公告)日:2023-10-17

    申请号:US16629071

    申请日:2018-06-19

    IPC分类号: G01F1/84

    摘要: Disclosed is a measurement pickup for determining the mass flow rate of a liquid comprising: at least one measurement tube for carrying the liquid having an inlet-side end section and an outlet-side end section; a support body on which the measurement tube is mounted an exciter for exciting vibrations of the measurement tube; at least one vibration sensor for detecting vibrations of the measurement tube; an operating and evaluation circuit for driving the exciter, for receiving the signals of the vibration sensor, and for ascertaining a measured value representing the mass flow rate. The operating and evaluation circuit comprises an adaptive low-pass filter for filtering the sequence of measured values representing the mass flow rate, wherein the low-pass filter has at least one filter parameter dependent on at least one adaptive controlled variable that, for its part, is dependent on the gas content of the test medium.

    METHOD FOR MONITORING A CORIOLIS MASS FLOW METER

    公开(公告)号:US20230184573A1

    公开(公告)日:2023-06-15

    申请号:US17996800

    申请日:2021-03-23

    发明人: Alfred Rieder Hao Zhu

    IPC分类号: G01F1/84

    CPC分类号: G01F1/8436

    摘要: The present disclosure relates to a method used to monitor a Coriolis mass flow meter, which has an oscillator with at least one measurement tube, the method including: exciting the oscillator so as to cause flexural vibrations of a first antisymmetric vibration mode by an excitation signal at a resonance frequency of the first antisymmetric vibration mode; sensing a vibration amplitude of the first antisymmetric vibration mode at the resonance frequency of the first antisymmetric vibration mode; sensing a time constant of the decaying free vibrations of the first antisymmetric vibration mode; and determining a modal elastic property of the oscillator with respect to the first antisymmetric vibration mode on the basis of the vibration amplitude of the first antisymmetric vibration mode, the excitation signal, and the time constant.

    Flow measuring system having transducer temperatures that deviate from measuring point temperatures

    公开(公告)号:US11573111B2

    公开(公告)日:2023-02-07

    申请号:US16315834

    申请日:2017-06-26

    IPC分类号: G01F1/84 G01F1/86 G01N11/16

    摘要: The measuring system includes a transducer apparatus with two tubes. Each tube is adapted to be flowed through by a fluid from an inlet end toward an outlet end and to be caused to vibrate. An electromechanical exciter mechanism excites and maintains mechanical oscillations of each of the tubes, and a sensor arrangement registers mechanical oscillations of at least one of the tubes. The transducer apparatus includes two temperature sensors each being mechanically and thermally conductively coupled with a wall of the tube, wherein each of the temperature sensors registers a measuring point temperature, and converts such into a temperature measurement signal temperature. A measuring and operating electronics (ME) generates a transducer temperature measured value representing a transducer apparatus temperature so that a magnitude of the transducer temperature measured value is greater than a magnitude of the measuring point temperature and less than a magnitude of the measuring point temperature.

    METHOD FOR MONITORING A FLOW OF A MEDIUM BY MEANS OF A CORIOLIS MASS FLOWMETER AND A DIFFERENTIAL PRESSURE MEASUREMENT DEVICE

    公开(公告)号:US20230032534A1

    公开(公告)日:2023-02-02

    申请号:US17758082

    申请日:2020-12-01

    IPC分类号: G01F1/34 G01F1/84

    摘要: A method for monitoring flow of a medium by means of a pressure difference measuring device and a Coriolis mass flowmeter having two oscillators, which comprise, in each case, a bent measuring tube pair, which are arranged on top of one another and connected for parallel flow between the two pressure measuring points of the pressure difference measuring device, comprising steps as follows: Registering a pressure difference between the first pressure measuring point and the second pressure measuring point; registering a first density measured value based on at least a first oscillation frequency of the first oscillator; registering a second density measured value based on at least a second oscillation frequency of the second oscillator; ascertaining a flow measured value based on the pressure difference, when a difference between the first density measured value and the second density measured value is less than a density difference limit value.

    VIBRATION-TYPE MEASURING TRANSDUCER AND VIBRONIC MEASURING SYSTEM FORMED THEREWITH

    公开(公告)号:US20220236160A1

    公开(公告)日:2022-07-28

    申请号:US17612540

    申请日:2020-04-15

    IPC分类号: G01N9/00 G01F1/84

    摘要: A measuring transducer includes a tube assembly including two pair of structurally identical tubes, each connected at their respective ends to each of two flow dividers, thereby forming four parallel flow paths, and each including alternating, adjoining straight and arcuate segments, wherein each of the first and third arcuate segments has a segment length corresponding to an extended length of a virtual center line of the segment, an arc radius corresponding to a radius of the virtual center line and a center point angle corresponding to a ratio between the segment length and the arc radius, such that each of the first arcuate segments are identical in both shape and size, and such that each of the third arcuate segments are identical in both shape and size, wherein the measuring transducer further includes an exciter assembly and a sensor assembly, each connected to the tube assembly.