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公开(公告)号：US12098939B2
公开(公告)日：2024-09-24
申请号：US17757370
申请日：2020-11-20
发明人： Ennio Bitto , Hao Zhu , Martin Josef Anklin , Wolfgang Drahm
IPC分类号： G01F1/84
CPC分类号： G01F1/8413 , G01F1/8477
摘要： A measuring tube arrangement of a measuring device for detecting a mass flow rate of a flowable medium includes: two measuring tubes for conducting the medium, wherein the measuring tubes each have an inlet and an outlet, wherein the measuring tubes are bent at least once between the inlet and outlet; a coupler arrangement for mechanically coupling the two measuring tubes, wherein the coupler arrangement has at least two coupler elements, wherein one coupler element is arranged at the inlet, and one coupler element is arranged at the outlet; two magnet arrangements, each having at least two magnets, arranged on the measuring tubes, wherein precisely one magnet arrangement is arranged on one measuring tube; and a connecting body configured to mechanically detachably connect the measuring tube arrangement to a carrier unit, wherein the connecting body is connected to the inlet and to the outlet of the respective measuring tubes.
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公开(公告)号：US12055423B2
公开(公告)日：2024-08-06
申请号：US17416834
申请日：2019-11-21
发明人： Hao Zhu , Wolfgang Drahm , Alfred Rieder
摘要： 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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公开(公告)号：US11550342B2
公开(公告)日：2023-01-10
申请号：US16331250
申请日：2017-08-23
发明人： Guido Horoba , Helmut Zeislmeier , Wolfgang Drahm , Rainer Höcker
摘要： A gas separator for separating a multiphase medium containing a gas and a liquid includes a tubular basic unit having a longitudinal axis, an intake for a gaseous medium, a liquid outlet and a gas outlet. The tubular basic unit has an intake region and a discharge region. The gas separator includes, between the intake region and the discharge region, a weir having a guiding surface, over which the medium can flow to form a shallow water region. The gas contained in the medium can escape from the medium in the shallow water region and be led away from the gas separator through the gas outlet. The disclosure is also directed to an apparatus for registering flow of at least one component of a multiphase medium.
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公开(公告)号：US20210396565A1
公开(公告)日：2021-12-23
申请号：US17357215
申请日：2021-06-24
发明人： Wolfgang Drahm , Hao Zhu , Alfred Rieder , Michael Wiesmann , Patrick Oudoire
摘要： A measuring system comprises: a measuring transducer; transmitter electronics; at least one measuring tube; and at least one oscillation exciter. The transmitter electronics delivers a driver signal for the at least one oscillation exciter, and for feeding electrical, excitation power into the at least one oscillation exciter. The driver signal, has a sinusoidal signal component which corresponds to an instantaneous eigenfrequency, and in which the at least one measuring tube can execute, or executes, eigenoscillations about a resting position. The eigenoscillations have an oscillation node and in the region of the wanted, oscillatory length exactly one oscillatory antinode. The driver signal has, a sinusoidal signal component with a signal frequency, which deviates from each instantaneous eigenfrequency of each natural mode of oscillation of the at least one measuring tube, in each case, by more than 1 Hz and/or by more than 1% of said eigenfrequency.
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公开(公告)号：US20180045545A1
公开(公告)日：2018-02-15
申请号：US15556058
申请日：2016-02-15
发明人： Nikolai Fink , Frank Schmalzried , Wolfgang Drahm
IPC分类号： G01F1/58
摘要： A magneto-inductive flow measuring device for measuring the flow of a flowable medium is described. The flow measuring device includes a measuring tube, a pair of coils, which are arranged opposite one another on the measuring tube and which are designed to produce an alternating magnetic field, which can be turned on and off, and which extends essentially transversely to the longitudinal axis of the measuring tube, as well as a pair of permanent magnets, which are arranged opposite one another on the measuring tube and which are designed to produce a permanent magnetic field, which extends essentially transversely to the longitudinal axis of the measuring tube. Moreover, the flow measuring device includes one or more pairs of measuring electrodes arranged opposite one another on the measuring tube, of which one pair of measuring electrodes is designed, in the case of turned off alternating magnetic field, to tap a measurement voltage induced by the permanent magnetic field, and an evaluation unit, which is designed, in the case of turned off alternating magnetic field, to monitor the measurement voltage induced by the permanent magnetic field, at least in the case of a predefined change of the measurement voltage, to turn on the alternating magnetic field and, by means of the alternating magnetic field, to determine a measured value for the flow.
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公开(公告)号：US20240077433A1
公开(公告)日：2024-03-07
申请号：US18257696
申请日：2021-11-26
发明人： Anne Habermehl , Stefan Pflüger , Wolfgang Drahm
IPC分类号： G01N22/00
摘要： A method for determining a deposit property of a variable deposit on an end face of a first microwave antenna of an assembly for determining a property of a multiphase medium that is to be conveyed, wherein the first microwave antenna is arranged in a first receptacle of the measuring pipe in a medium-contacting manner, wherein the method comprises emitting an excitation signal by means of the first microwave antenna, wherein the excitation signal comprises a sequence of high-frequency signals; receiving a reflected excitation signal by means of the first microwave antenna; determining a first test quantity on the basis of the reflected excitation signal; and determining on the basis of the first test quantity the deposit property of the variable deposit, in particular a variable dependent on a deposit thickness of the variable deposit.
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公开(公告)号：US20230213367A1
公开(公告)日：2023-07-06
申请号：US17757469
申请日：2020-12-01
发明人： Frank Schmalzried , Heinz Rufer , Wolfgang Drahm , Thomas Küng
摘要： A method for operating a magnetically-inductive flowmeter, wherein the magnetically-inductive flowmeter includes: a measuring tube for guiding a flowable medium; at least two measuring electrodes for detecting a flow velocity-dependent measuring voltage induced in the medium; and a magnetic field-generating device for generating a magnetic field passing through the measuring tube, wherein the magnetic field-generating device includes a coil system with at least one coil, includes determining a deviation σ of a reactance of the coil system or of a variable dependent upon the reactance of the coil system from a desired value. A magnetically inductive flowmeter is also disclosed.
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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
发明人： Stefan Pflüger , Wolfgang Drahm , Hao Zhu
摘要： 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：US20220082423A1
公开(公告)日：2022-03-17
申请号：US17416834
申请日：2019-11-21
发明人： Hao Zhu , Wolfgang Drahm , Alfred Rieder
摘要： 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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公开(公告)号：US20210003491A1
公开(公告)日：2021-01-07
申请号：US16956940
申请日：2018-12-10
发明人： Stefan Pflüger , Wolfgang Drahm , Hao Zhu
摘要： Method for continuous determining of fat content of milk having variable solids fractions and flowing with variable gas content in a pipeline, comprising: ascertaining a value for velocity of sound and an average density value for milk flowing in the pipeline based on eigenfrequencies of at least two bending oscillation wanted modes of measuring tubes of a densimeter arranged in the pipeline; ascertaining a value for static pressure in the pipeline by means of a pressure sensor connected to the pipeline; ascertaining a value for gas volume fraction based on the value for the velocity of sound, the value for the average density and the value for the pressure; ascertaining a value of density of milk flowing in the pipeline without gas content based on the value for the average density and based on the value for the gas volume fraction; ascertaining a value for permittivity of milk flowing in the pipeline based on at least one measuring of propagation velocity and/or absorption of microwaves in the milk by means of a microwave sensor arranged in the pipeline; and calculating fat fraction based on the value of the density of the milk flowing in the pipeline without gas content and the value for the effective permittivity.
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