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公开(公告)号：US12007268B2
公开(公告)日：2024-06-11
申请号：US17298050
申请日：2019-10-31
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Wolfgang Drahm
Abstract: A method for determining a flowed amount of a medium includes using a first flow measuring transducer according to a first measuring principle and a second flow measuring transducer according to a second measuring principle. The measured values of the first transducer are more reliable in first states of the medium than measured values of the second transducer, and the second measured values are more reliable in second states than the first measured values. A contribution to the flowed amount is ascertained based on the more reliable measured values. The contribution to the flowed amount based on the second measured values is ascertained via a transfer function. An updated version of the transfer function is ascertained when the first measured values are more reliable, and the flowed amount earlier ascertained based on the second measured values is corrected as a function of the updated transfer function.
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62.发明公开公开(公告)号：US20240003798A1
公开(公告)日：2024-01-04
申请号：US18255265
申请日：2021-11-26
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Gerhard Eckert
CPC classification number: G01N9/32 , G01F1/8477 , G01F1/8422
Abstract: A density measurement reading of a medium is determined using a Coriolis mass flow transmitter with two oscillators with pairs of measuring tubes arranged one above the other in parallel flow and leading into collectors. The mounting of the transmitter in the pipeline causes mechanical voltages that influence the oscillators via the collectors. The method includes excitation of a vibration mode of the oscillators and a determination of the natural frequency of the excited vibration modes. The method also includes a determination of a preliminary density measurement reading based on the natural frequencies and a deviation between the preliminary density measurement readings. A corrected density measurement reading is determined using a model, which determines and corrects the influence of mechanical voltages on the density measurement based on the deviation.
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公开(公告)号：US11846533B2
公开(公告)日：2023-12-19
申请号：US17288965
申请日：2019-09-18
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu
CPC classification number: G01F1/8477 , G01F1/8422 , G01F1/8427 , G01F1/8431 , G01F1/8436 , G01K13/00
Abstract: A method for correcting a measured value of a measured variable with reference to a medium flowing through at least two measuring tubes, wherein each measuring tube is excited by an oscillation exciter to execute oscillations, and wherein the oscillations of each measuring tube are registered by oscillation sensors, wherein an electronic circuit monitors at least two of the following measured variables or, in each case, a measured variable derived therefrom: phase difference between measurement signals, resonant frequency, ratio of an oscillation exciter electrical current amplitude to a measuring tube oscillation amplitude, the method including: determining a plausibility; and, wherein upon failing a plausibility requirement of at least one of the measured variables, determining measured values of the measured variables of at least one, first/second measuring tube as a function of corresponding measured values of the measured variables of at least one, second/first measurement tube.
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公开(公告)号：US20230028225A1
公开(公告)日：2023-01-26
申请号：US17757554
申请日：2020-12-01
Applicant: Endress+Hauser Flowtec AG
Inventor： Stephan Schäfer , Hao Zhu
Abstract: The present disclosure relates to a method for measuring the flow of a liquid medium having variable gas content, on the basis of a differential pressure measurement by means of a differential pressure-generating primary element, through which the medium flows, which method comprises: ascertaining a differential pressure measurement value between two measuring points of the differential pressure-generating primary element; ascertaining a flow regime; ascertaining a flow rate measurement value as a function of the differential pressure measurement value and the flow regime, wherein the flow rate measurement value is ascertained by ascertaining a provisional flow rate measurement value on the basis of the differential pressure measurement value under the assumption of a first flow regime, which provisional flow rate measurement value is corrected if a second flow regime different from the first flow regime is detected.
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65.发明申请公开(公告)号：US20220333971A1
公开(公告)日：2022-10-20
申请号：US17754074
申请日：2020-08-20
Applicant: Endress+Hauser Flowtec AG
Inventor： Alfred Rieder , Hao Zhu , Wolfgang Drahm , Andreas Güttler
Abstract: An arrangement includes a pipeline and a Coriolis volumetric flow meter for measuring a mass flow rate of a medium flowing through the pipeline. A first pressure sensor is attached at an inlet-side of the pipeline and a second pressure sensor is attached at an outlet-side of the pipeline, or wherein a differential pressure sensor is configured to detect a difference between an inlet-side and an outlet-side. The pressure sensors and/or the differential pressure sensor are configured to measure a media pressure and to determine, for each differential pressure, a volumetric flow velocity of the medium through the pipeline. A first monitoring sensor is attached at an inlet-side portion of the pipeline and a second monitoring sensor is attached at an outlet-side portion of the pipeline, wherein the monitoring sensors are configured to monitor a measurement variable different from the media pressure to identify a static media state.
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Patent Agency Ranking
公开(公告)号：US20210164821A1
公开(公告)日：2021-06-03
申请号：US16770394
申请日：2018-11-13
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Bernd Josef Schäfer
IPC: G01F1/84
Abstract: Disclosed is a method for determining the viscosity of a medium using a Coriolis mass flow meter, comprising: exciting bending vibrations in the measuring tube in a symmetrical bending vibration use mode using an exciter arranged symmetrically in relation to a longitudinal direction of the measuring tube; detecting sensor signals of a central vibration sensor also arranged symmetrically in relation to a longitudinal direction of the measuring tube; detecting sensor signals of a vibration sensor on the inlet side and of a vibration sensor on the outlet side; determining a phase relation or time delay between the sensor signals of the central vibration sensor and a symmetrical function of the sensor signals on the inlet-side and outlet-side vibration sensors. Determining the viscosity of the medium as a function of said phase relation or time delay.
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公开(公告)号：US10712189B2
公开(公告)日：2020-07-14
申请号：US16312137
申请日：2017-05-18
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Alfred Rieder
Abstract: A method serves for operating a measuring transducer of vibration-type having at least two oscillators, each of which is formed by a pair of measuring tubes, wherein the pairs of measuring tubes are arranged for parallel flow, wherein the two oscillators have mutually independent oscillator oscillations with mutually differing eigenfrequencies for corresponding oscillation modes. The method includes steps of determining a first value of a primary measurement variable, or of a variable derived therefrom, using the first oscillator, determining a second value of the primary measurement variable, or of a variable derived therefrom, using the second oscillator, checking an actual ratio between the first value and the second value by comparison with an expected ratio between the first value and the second value, and outputting a signal when the actual ratio does not correspond to the expected ratio.
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公开(公告)号：US20190383658A1
公开(公告)日：2019-12-19
申请号：US16471648
申请日：2017-11-22
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Alfred Rieder , Ennio Bitto , Gerhard Eckert
Abstract: The present disclosure relates to a vibration-type sensor for measuring the density and/or the mass flow rate of a medium, having at least one first oscillator, the sensor including: a curved first measuring tube; a curved second measuring tube; at least one first elastic vibration coupler that couples the first measuring tube and the second measuring tube to each; and at least one exciter for exciting oscillator vibrations in a bending vibration mode. The oscillator has a first oscillator resonant frequency for when the measuring tubes vibrate approximately in phase in the bending vibration mode and a greater second oscillator resonant frequency for when the measuring tubes vibrate approximately in counterphase in the bending vibration mode. The first and second measuring tubes have resonant frequencies differing from their arithmetic mean by no more than 8%, no more than 4%, no more than 2% or no more than 1%.
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公开(公告)号：US10371553B2
公开(公告)日：2019-08-06
申请号：US15125315
申请日：2015-02-23
Applicant: Endress + Hauser Flowtec AG
Inventor： Alfred Rieder , Hao Zhu , Ennio Bitto , Gerhard Eckert , Josef Hubensteiner , Michael Wiesmann , Yaoing Lin
Abstract: transducer apparatus comprises a transducer housing, a tube, a temperature sensor as well as a temperature sensor. The tube is arranged within a cavity of the transducer housing, in such a manner that an intermediate space is formed between a wall of the transducer housing facing the cavity inner surface and an outer surface of a wall of the tube facing the cavity. Furthermore, the tube is adapted to guide a fluid in its lumen, in such a manner that an inner surface of the wall of the tube facing the lumen is contacted by fluid guided in the lumen. Each of the temperature sensors is formed by means of a temperature detector arranged within the intermediate space as well as by means of a coupling body coupling the respective temperature detector thermally conductively with the wall of the tube and is additionally adapted to register a particular measurement location temperature, and to transduce such into a corresponding temperature measurement signal, namely an electrical measurement signal representing the particular measurement location temperature.
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公开(公告)号：US20180231411A1
公开(公告)日：2018-08-16
申请号：US15749888
申请日：2016-07-26
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Alfred Rieder , Gerhard Eckert
Abstract: The invention relates to a method for ascertaining a physical parameter of a gas using a measuring transducer having a measuring tube for conveying the gas, wherein the measuring tube is excitable to execute bending oscillations of different modes and eigenfrequencies, the method includes: ascertaining the eigenfrequency of the f1-mode and f3-mode; ascertaining preliminary density values for the gas based on the eigenfrequencies of the f1-mode and f3-mode; ascertaining a value for the velocity of sound of the gas, and/or, dependent on the velocity of sound and the eigenfrequency of a mode, at least one correcting term and/or density error for the preliminary density value; and/or a correcting term for a preliminary mass flow value for determining a corrected mass flow measured value based on the first preliminary density value, the second preliminary density value, the eigenfrequencies of the f1-mode and f3-mode.
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