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公开(公告)号:US20240344870A1
公开(公告)日:2024-10-17
申请号:US18294811
申请日:2022-07-22
发明人: Johan Pohl , Rémy Scherrer , Hao Zhu
CPC分类号: G01F1/8436 , G01F1/8422 , G01F1/8427 , G01F1/8459 , 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.
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公开(公告)号:US12061105B2
公开(公告)日:2024-08-13
申请号:US17757219
申请日:2020-11-20
发明人: Hao Zhu
CPC分类号: G01F1/8436 , G01F1/50 , G01N9/32 , G01N11/08
摘要: The present disclosure relates to a method for operating a flow measuring point for media having at least one liquid phase, the flow measuring point including: a Coriolis measuring device for measuring the mass flow rate and the density of a medium flowing through a pipeline; and a pressure-difference measuring apparatus for sensing the pressure difference between a flow region arranged upstream of the Coriolis measuring device and a flow region arranged downstream of the Coriolis measuring device, wherein a flow measurement based on measured values of the pressure difference is corrected by means of measured values acquired using the Coriolis measuring device.
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公开(公告)号:US12044559B2
公开(公告)日:2024-07-23
申请号:US17758082
申请日:2020-12-01
发明人: Hao Zhu , Josef Hubensteiner
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.
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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.
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公开(公告)号:US11788875B2
公开(公告)日:2023-10-17
申请号:US16629071
申请日:2018-06-19
发明人: Hao Zhu , Rémy Scherrer
IPC分类号: G01F1/84
CPC分类号: G01F1/8477 , G01F1/8422 , G01F1/8427 , G01F1/8436
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.
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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.
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7.
公开(公告)号:US11573111B2
公开(公告)日:2023-02-07
申请号:US16315834
申请日:2017-06-26
发明人: Alfred Rieder , Gerhard Eckert , Ennio Bitto , Hao Zhu
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.
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公开(公告)号:US20230032534A1
公开(公告)日:2023-02-02
申请号:US17758082
申请日:2020-12-01
发明人: Hao Zhu , Josef Hubensteiner
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.
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公开(公告)号:US20220334038A1
公开(公告)日:2022-10-20
申请号:US17616973
申请日:2020-05-04
发明人: Hao Zhu , Michael Wiesmann
摘要: A measuring device for determining the density, the mass flow and/or the viscosity of a gas-charged liquid includes an oscillator, having a media-conducting measuring tube and two vibrational modes having media-density-dependent natural frequencies; an exciter for exciting the two vibrational modes; a vibrational sensor for detecting vibrations of the oscillator; and an operating and evaluating circuit to apply an excitation signal to the exciter, detect signals of the vibration sensor, determine current values of the natural frequencies of the two vibrational modes of the oscillator and fluctuations of the natural frequencies. The operating and evaluating circuit is designed to determine a first media state value, wherein the operating and evaluating circuit is furthermore designed to determine a second media state value which represents a gas charge of the medium.
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公开(公告)号:US20220236160A1
公开(公告)日:2022-07-28
申请号:US17612540
申请日:2020-04-15
发明人: Hao Zhu , Gerhard Eckert , Ennio Bitto , Alfred Rieder , Marc Werner
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.
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