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公开(公告)号：US12298160B2
公开(公告)日：2025-05-13
申请号：US17757469
申请日：2020-12-01
Applicant: Endress+Hauser Flowtec AG
Inventor： Frank Schmalzried , Heinz Rufer , Wolfgang Drahm , Thomas Küng
Abstract: 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：US12266841B2
公开(公告)日：2025-04-01
申请号：US18258288
申请日：2021-11-26
Applicant: Endress+Hauser Flowtec AG
Inventor： Stefan Pflüger , Thilo Ihringer
Abstract: An antenna for high-frequency based measuring devices for determining a dielectric value of media is based on a high-frequency waveguide. The high-frequency signal is coupled in or out via a coaxial conductor that runs orthogonally through the axis of the high-frequency waveguide for this purpose. The conductor termination for the coaxial conductor extends extensively beyond the high-frequency waveguide in such a way that the coaxial conductor forms a defined capacitance in this region. In this way, the coaxial conductor is optimally matched to the high-frequency waveguide without having to integrate additional electrical components for this purpose.
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3.发明申请公开(公告)号：US20250102334A1
公开(公告)日：2025-03-27
申请号：US18689740
申请日：2022-08-10
Applicant: Endress+Hauser Flowtec AG
Inventor： Christof Huber , Raphael Kuhnen , Anne Habermehl , Wolfgang Drahm
IPC: G01F1/58
Abstract: A device for determining a flow-rate-dependent variable of a flowable and conductive medium in a guide body for guiding the medium includes a magnetic-field-generating device for generating a first magnetic field that separates mobile charge carriers in the medium and a magnetic-field-sensitive measuring arrangement for determining a second magnetic field that is generated by the mobile charge carriers. The magnetic-field-sensitive measuring arrangement includes a first magnetic-field-sensitive measuring device having a magnetic-field-sensitive and optically excitable material, an optical excitation unit for the optical excitation of the first magnetic-field-sensitive measuring device, and an optical detection unit for detecting a measurement signal that correlates with a change and/or a strength of the second magnetic field. An evaluation circuit is configured to determine the flow-rate-dependent variable, measurement signals of at least two different magnetic field states influencing the determination of the flow-rate-dependent variable.
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公开(公告)号：US20250093189A1
公开(公告)日：2025-03-20
申请号：US18920287
申请日：2024-10-18
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Alfred Rieder , Yaoying Lin , Robert Lalla , Reinhard Huber
Abstract: A measuring device for determining density, mass flow rate and/or viscosity of a flowable medium includes: an oscillator including at least one oscillatable measuring tube for conveying the medium, and having at least one oscillatory mode, whose eigenfrequency depends on density of the medium; an exciter for exciting the oscillatory mode; at least one oscillation sensor for registering oscillations of the oscillator; and an operating-evaluating circuit, which is adapted to supply the exciter with an excitation signal, to register signals of the oscillation sensor, based on the signals of the oscillation sensor to ascertain current values of the eigenfrequency of the oscillator as well as variations of the eigenfrequency, and to determine a value characterizing density variations of the medium, wherein the value depends on a function, which is proportional to the variation of the eigenfrequency and has an eigenfrequency dependent normalization.
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公开(公告)号：US20250067586A1
公开(公告)日：2025-02-27
申请号：US18720940
申请日：2022-12-02
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Alfred Rieder , Wolfgang Drahm , Yaoying Lin
Abstract: The method determines a characteristic passage time of a component of a flowing medium in a vibrating measuring tube of a Coriolis mass flow meter. The flow meter has the measuring tube, an exciter for exciting a bending vibration mode of the measuring tube, and a vibration sensor for sensing the measuring tube vibrations. The component is present inhomogenously in the medium and has a component density which deviates from an average density of the medium. The method includes feeding an excitation signal to the exciter with a natural frequency a bending vibration mode, ascertaining at least one first time profile of a signal amplitude of the first vibration sensor at a natural frequency of an anti-symmetrical bending vibration mode, and ascertaining the characteristic passage time on the basis of the first time profile of the signal amplitude at the natural frequency of the anti-symmetrical bending vibration mode.
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Patent Agency Ranking
公开(公告)号：US20250035526A1
公开(公告)日：2025-01-30
申请号：US18716654
申请日：2022-11-21
Applicant: Endress+Hauser Flowtec AG
Inventor： Andreas Güttler , Helmut Zeislmeier , Ralf Schweigler
IPC: G01N9/00
Abstract: The invention relates to a device for determining a property of a liquid component of a gas-loaded medium comprising a pipeline for conducting the medium with a first section, wherein the first section has an inclination of less than 20° and a second section in the form of a riser, wherein the second section forms an angle of at least 45° with respect to a horizontal, characterized in that a closed end is arranged in an extension of the first section. A connection of the second section to the first section defines a beginning of the closed end, and at least one measuring device for measuring the property of the liquid component is arranged in an end region of the closed end.
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公开(公告)号：US20250035472A1
公开(公告)日：2025-01-30
申请号：US18715566
申请日：2022-11-28
Applicant: Endress+Hauser Flowtec AG
Inventor： Florent Tschambser , Tulio Paiva Galvao , Werner Wohlgemuth , Pierre-Jean Ober
Abstract: A method for operating a magnetic-inductive flowmeter includes: applying a first voltage signal to a device for generating a magnetic field, the first voltage signal being divided into time intervals, each having a first time sub-interval, in which a first voltage is applied to the device, wherein the first voltage is controlled such that a deviation of the coil current from a predetermined coil current target value during a measurement interval is minimized, wherein the coil current target value is constant for the entire first voltage signal; and applying a second voltage signal to the device, the second voltage signal being divided into time intervals, each having a second time sub-interval, in which a second voltage is applied to the device, wherein the second voltage is controlled such that a deviation of a control function from a control target value is minimized.
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公开(公告)号：US20250027798A1
公开(公告)日：2025-01-23
申请号：US18715496
申请日：2022-11-22
Applicant: Endress+Hauser Flowtec AG
Inventor： Florent Tschambser , Tulio Paiva Galvao , Simon Triebenbacher , Daniel Kuttler
Abstract: A magnetic-inductive flow meter for determining a flow velocity-dependent measurement variable of a flowable medium includes: a device for generating a magnetic field and a device for tapping a measurement voltage induced in the flowable medium; an operating circuit configured such that, by an electrical operating signal having a variable coil voltage and a variable coil current, electrical power is feed into the magnetic field device, wherein the operating signal has a temporally variable coil voltage curve, which is divided into time intervals, each having a first time subinterval in which a first coil voltage is applied to the magnetic field device; a control circuit configured to control at least the first coil voltage such that a deviation of a control function from a predefined control target value is minimal; and a diagnostic circuit for monitoring at least one diagnostic value.
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公开(公告)号：US20250012693A1
公开(公告)日：2025-01-09
申请号：US18579435
申请日：2022-07-04
Applicant: Endress+Hauser Flowtec AG
Inventor： Benjamin Schwenter , Marc Werner , Markus Schütz
IPC: G01N9/32
Abstract: A connection unit for at least one vibration-tube module of a modular measuring device for determining the density of a measurement medium includes: a measurement-medium inlet, which extends along a first axis; a measurement-medium outlet, which extends along a second axis; at least a first vibration-tube inlet, which is fluidically connected to the measurement-medium inlet; and at least a first vibration-tube outlet, which is fluidically connected to the measurement-medium outlet, wherein the measurement-medium inlet and the measurement-medium outlet are opposite each other such that they are separated with respect to a first plane and are mechanically connected to each other by at least one support unit, and wherein the first axis and the second axis each form an angle of greater than 45° to the first plane.
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公开(公告)号：US20240426770A1
公开(公告)日：2024-12-26
申请号：US18698446
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
IPC: G01N22/00
Abstract: A method for distinguishing between the presence of a foreign body and a gas bubble in a flowable medium in a pipeline or a container includes evaluating received microwave signals, wherein mechanical vibrations are introduced into the medium by means of which a gas bubble present in the medium is set into vibration. A gas bubble is detected only in the event that when mechanical vibrations are introduced and the received microwave signals or the value derived therefrom is/are modulated; otherwise, a foreign body is detected. Also disclosed is a system which is suitable for carrying out the method according to the present disclosure.
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