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公开(公告)号：US12287349B2
公开(公告)日：2025-04-29
申请号：US16956573
申请日：2018-11-15
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Alfred Rieder , Ennio Bitto , Gerhard Eckert
Abstract: A measuring transducer includes a tube arrangement having a bent tube, an equally embodied tube, a bent tube and a tube embodied equally to the tube, and two flow dividers each having four flow openings. The measuring transducer includes an exciter for exciting and maintaining mechanical oscillations of the tube arrangement and a sensor for registering mechanical oscillations of the tube arrangement and for producing oscillation measuring signals. Each tube is connected to each flow divider to form four parallel flow paths, having a straight segment connected with the flow divider, an arc shaped segment following such straight segment, a straight segment following such arc shaped segment, an arc shaped segment following such straight segment, a straight segment following such arc shaped segment, an arc shaped segment following such straight segment, and a straight segment following such arc shaped segment and is connected with the flow divider.
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公开(公告)号：US12228441B2
公开(公告)日：2025-02-18
申请号：US17996800
申请日：2021-03-23
Applicant: Endress+Hauser Flowtec AG
Inventor： Alfred Rieder , Hao Zhu
IPC: G01F1/84
Abstract: 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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43.发明申请公开(公告)号：US20240418897A1
公开(公告)日：2024-12-19
申请号：US18705731
申请日：2022-09-22
Applicant: Endress+Hauser Flowtec AG
Inventor： Mohammad Sadegh Ebrahimi , Dietmar Frühauf , Volker Frey , Raphael Kuhnen , Wolfgang Drahm , Stefan Pflüger , Anne Habermehl , Hao Zhu
Abstract: The present disclosure relates to a system for identifying the presence of a foreign body in a flowable medium in a pipeline. The system comprises a pipeline having a line inlet section and a choke section and also comprises a first transmitting/receiving unit for the line inlet section and a second transmitting/receiving unit for the line outlet section and a superordinate unit, which system is designed to ascertain the presence of a foreign body in the medium on the basis of at least one comparison between the mean permittivity (epsilon_m,3) in the choke section and the mean permittivity (epsilon_m,1) in the line inlet section.
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公开(公告)号：US20240344869A1
公开(公告)日：2024-10-17
申请号：US18290957
申请日：2022-07-04
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Johan Pohl , Alfred Rieder
IPC: G01F1/84
CPC classification number: G01F1/8431 , G01F1/8422 , G01F1/8427 , G01F1/8477
Abstract: A method for operating a Coriolis mass flowmeter having at least one vibratable measuring tube for conducting a medium includes exciting a first symmetrical bending vibration mode of the at least one measuring tube, and exciting a second symmetrical bending vibration mode of the at least one measuring tube. A first mass flow rate measurement value is determined on the basis of a first Coriolis deformation of the at least one measuring tube and a first stored mode-specific zero point error value. A second mass flow rate measurement value is determined on the basis of a second Coriolis deformation of the at least one measuring tube and a second stored mode-specific zero point error value. A zero point deviation value of the mass flow rate measurement is determined as a function of a deviation between the first mass flow rate measurement value and the second mass flow rate measurement value.
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公开(公告)号：US20240027249A1
公开(公告)日：2024-01-25
申请号：US18245427
申请日：2021-06-18
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Claude Hollinger
IPC: G01F1/84
CPC classification number: G01F1/8422 , G01F1/8436 , G01F1/8472
Abstract: A sensor includes an oscillator having a measuring tube for a medium, an exciter array having two exciter assemblies, an inlet-side and an outlet-side sensor array, and a measuring and operating circuit for driving the exciter array and detecting the sensor arrays. A first of the exciter assemblies is secured to a measuring tube, and the measuring tube is intended to be excited to vibrate in relation to a second of the exciter assemblies. A center of gravity of the first exciter assembly lies in a measuring tube transverse plane in relation to which the measuring tube runs mirror-symmetrically. The exciter array comprises an electrodynamic exciter and a compensating mass, where the electrodynamic exciter is designed to exert an exciter force, which acts between the first and the second exciter assembly, on the measuring tube. The effective center of the exciter force is located outside the measuring tube transverse plane.
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Patent Agency Ranking
公开(公告)号：US20230384135A1
公开(公告)日：2023-11-30
申请号：US18250118
申请日：2021-09-23
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Ennio Bitto , Gerhard Eckert
IPC: G01F1/84
CPC classification number: G01F1/8413 , G01F1/8477
Abstract: A Coriolis measuring transducer comprises a pair of measuring tubes; an exciter; at least two sensors; and two manifolds. Each measuring tube has a first outer measuring tube bend and a second outer measuring tube bend. Each measuring tube pair has a first group of at least two fixing elements and a second group of at least two fixing elements. The fixing elements have, along the measuring tube centerline, a first separation from outer ends of the measuring tube bends of at most 0.7 bend length. The outer measuring tube bends have, in each case, at least one stiffening element, wherein the stiffening elements are arranged between the groups of fixing elements, wherein the stiffening elements have, in each case, a second separation from an inner end of their measuring tube bend of at least 0.2 bend length.
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公开(公告)号：US11579060B2
公开(公告)日：2023-02-14
申请号：US16956940
申请日：2018-12-10
Applicant: Endress+Hauser Flowtec AG
Inventor： Stefan Pflüger , Wolfgang Drahm , Hao Zhu
Abstract: Disclosed is a method for determining of fat content of milk having variable solids fractions and flowing with variable gas content in a pipeline. The method includes ascertaining a velocity of sound and an average density value for the milk based on eigenfrequencies of at least two bending oscillation wanted modes of measuring tubes of a densimeter arranged in the pipeline. The method further includes ascertaining a static pressure in the pipeline; a gas volume fraction based on the velocity of sound; the average density; the pressure; a density of the milk without gas content based on the average density and the gas volume fraction; and a permittivity of the milk based on a propagation velocity and/or an absorption of microwaves in the milk. The fat fraction is calculated based on the density of the milk without gas content and on the effective permittivity.
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公开(公告)号：US20230022150A1
公开(公告)日：2023-01-26
申请号：US17757219
申请日：2020-11-20
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu
Abstract: 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. 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：US11353510B1
公开(公告)日：2022-06-07
申请号：US17134806
申请日：2020-12-28
Applicant: Endress+Hauser Flowtec AG
Inventor： Jerry E. Stevens , Hao Zhu , Marcel Braun
IPC: G01R31/28 , G01R31/319
Abstract: A method for testing a device under test, the device under test being a measuring instrument to measure a physical parameter of a fluid, includes: performing a plurality of valid test runs, wherein a valid test run includes: exposing the device under test and a reference measuring instrument to the fluid under a set of influences, the set of influences being defined by influence parameters; monitoring the influence parameters; obtaining a reference value for the physical parameter from the reference measuring instrument; and obtaining a test value for the physical parameter from the device under test, wherein a test run is invalidated if influence parameters do not meet specified test requirements for the influence parameters; and then evaluating a plurality of test values originating from the plurality of valid test runs with respect to at least one of accuracy, repeatability and reproducibility.
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公开(公告)号：US20220082423A1
公开(公告)日：2022-03-17
申请号：US17416834
申请日：2019-11-21
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Wolfgang Drahm , Alfred Rieder
Abstract: A method for ascertaining a physical parameter of a liquid, which has a gas charge using a measuring transducer having a measuring tube for conveying the medium. The measuring tube executes oscillations in bending oscillation mode. The method includes: exciting the measuring tube with an eigenfrequency of a bending oscillation mode—or f1-mode, ascertaining a suppressed excitation frequency, at which the oscillation amplitude of the measuring tube is minimum; identifying the frequency as the resonant frequency of the gas-charged liquid; ascertaining a density correction term as a function of the resonant frequency for correcting a preliminary density measured value and/or mass flow correction term as a function of the resonant frequency for correcting a preliminary mass flow rate measured value, and/or ascertaining the velocity of sound in the gas-charged liquid in the measuring tube as a function of the resonant frequency.
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