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公开(公告)号：US20190154485A1
公开(公告)日：2019-05-23
申请号：US16311953
申请日：2017-05-18
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Alfred Rieder
CPC classification number: G01F1/8436 , G01F1/74 , G01F1/8477 , G01F15/02 , G01F25/0007 , G01N9/002 , G01N11/16 , G01N2009/004
Abstract: A method for determining density and/or mass flow of a compressible medium with a measuring transducer of vibration-type having at least two oscillators, each including 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 the values of the eigenfrequencies of at least two different oscillator oscillations, determining at least two preliminary density measured values based on the values of the eigenfrequencies, and determining a correction term for one of the preliminary density measured values and/or for a preliminary measured value of flow based on the preliminary density measured values and the values of the eigenfrequencies.
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公开(公告)号：US10234338B2
公开(公告)日：2019-03-19
申请号：US15125252
申请日：2015-02-23
Applicant: Endress + Hauser Flowtec AG
Inventor： Alfred Rieder , Hao Zhu , Michael Wiesmann
Abstract: A transducer apparatus comprises a transducer housing, a tube 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. 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. The temperature sensor is formed by means of two temperature detectors arranged within the intermediate space as well as by means of a coupling body coupling the temperature detector thermally conductively with the wall of the tube as well as by means of a coupling body coupling the temperature detector thermally conductively with the temperature detector and is additionally adapted to register a particular measurement location temperature, namely a temperature at a first, respectively second, temperature measurement location formed by means of the respective temperature detector, 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：US20240385021A1
公开(公告)日：2024-11-21
申请号：US18690048
申请日：2022-08-12
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu
Abstract: A vibronic sensing element comprises an oscillator with a measuring tube for guiding a medium; an electrodynamic exciter arrangement; sensor arrangements for detecting the bending vibrations of the measuring tube; and a measuring and operating circuit. The exciter arrangement includes a first and a second electrodynamic exciter and a first compensation mass body. The first exciter is configured to exert a force on the measuring tube, and the second electrodynamic exciter is configured to exert a second force on the measuring tube. The measuring and operating circuit is configured to apply a first exciter signal with the eigenfrequency of a symmetric vibration mode only to the first exciter and apply a second exciter signal with the eigenfrequency of an antisymmetric vibration mode only to the second exciter.
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公开(公告)号：US20240344868A1
公开(公告)日：2024-10-17
申请号：US18701083
申请日：2022-09-22
Applicant: Endress+Hauser Flowtec AG
Inventor： Ennio Bitto , Hao Zhu , Dirk Butzbach
IPC: G01F1/84
CPC classification number: G01F1/8418 , G01F1/8477
Abstract: A Coriolis mass flow meter includes: a measuring tube for guiding a medium; a support body connected to the measuring tube on the inlet side and on the outlet side; an exciter for exciting bending vibrations of the measuring tube; at least two vibration sensors for detecting vibrations of the measuring tube; and a reinforcing body fastened to a lateral surface of the measuring tube and surrounds the measuring tube, the reinforcing body including, at least in sections, a helical course with a plurality of windings, a distance between two adjacent windings of the reinforcing body being not less than twice, for example, not less than four times or not less than eight times, a material thickness of the reinforcing body in the region of the windings.
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公开(公告)号：US12104939B2
公开(公告)日：2024-10-01
申请号：US17621306
申请日：2020-05-26
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Alfred Rieder , Martin Josef Anklin , Reinhard Huber , Yaoying Lin
CPC classification number: G01F1/8427 , G01N9/002 , G01N2009/006
Abstract: A method for the measurement of a physical parameter of a liquid by means of a sensor having at least one measuring tube for conducting the liquid, wherein the measuring tube can be excited to vibrate in at least one flexural vibration mode, comprises: determining at least one current value of a vibration parameter of the flexural vibration mode; determining a measurement value of the physical parameter according to the current value of the vibration parameter, wherein the measurement value is compensated in respect of the resonator effect according to a current value for the natural frequency of the flexural vibration mode and according to the sound velocity of the liquid conducted in the measuring tube, wherein the value for the sound velocity is provided independently of the vibrations of the measuring tube.
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Patent Agency Ranking
公开(公告)号：US20240318998A1
公开(公告)日：2024-09-26
申请号：US18575383
申请日：2022-06-28
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Gerhard Eckert
CPC classification number: G01F25/10 , G01F1/8422 , G01F1/8477
Abstract: A method for operating a Coriolis measurement device is provided. The Coriolis measurement device comprises at least one measuring tube for conducting a medium, at least one exciter for exciting measuring tube oscillations, at least one first sensor and at least one second sensor for detecting measuring tube oscillations, an electronic measuring/operating circuit for operating the exciter and for detecting and evaluating measuring signals of the sensors. The method comprises the following steps: checking, in a first method step, whether one of the following variables of the medium: flow velocity or mass flow, exceeds a first threshold value and/or whether a variation of a measuring signal from an average value exceeds a second threshold value, and in a second method step, if the first threshold value and/or the second threshold value is exceeded, increasing an oscillation amplitude of the measuring tube oscillations by a factor E by boosting exciter performance.
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公开(公告)号：US20240210227A1
公开(公告)日：2024-06-27
申请号：US17906831
申请日：2021-03-08
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu
IPC: G01F1/84
CPC classification number: G01F1/8436 , G01F1/8422 , G01F1/8427
Abstract: The present disclosure relates to method for operating a Coriolis measuring device, comprising the following method steps: determining an attenuation of the measuring tube vibrations in the region of the first vibration sensor and in the region of the second vibration sensor, measuring a first measurement variable by means of the measurement signals from the first vibration sensor and from the third vibration sensor, measuring a second mass flow rate by means of the measurement signals from the second vibration sensor and from the third vibration sensor, determining an influence of the attenuation on the first measurement variable and on the second measurement variable, forming differences between measured values of the first measurement variable and measured values of the second measurement variable, and comparing the differences with the determined attenuation of the measuring tube vibrations.
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公开(公告)号：US20240142286A1
公开(公告)日：2024-05-02
申请号：US18547798
申请日：2022-01-27
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu
CPC classification number: G01F15/185 , G01F1/58 , G01F1/662 , G01F1/8418
Abstract: A measuring device includes a measuring transducer, which includes a protection housing, two connection connectors, and a fluid line, which extends from a first end to a second end, wherein the first and second ends of the fluid line are each connected to one of the connection connectors, respectively, and wherein at least one of the connection connectors includes a metal compensator in a region located between a first connector end and a second connector end, which second end forms an end of the protection housing adjacent the first and/or second end of the fluid line.
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公开(公告)号：US20240044686A1
公开(公告)日：2024-02-08
申请号：US18258921
申请日：2021-11-26
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Ennio Bitto
IPC: G01F1/84
CPC classification number: G01F1/8436 , G01F1/8422
Abstract: A method for determining variables influencing a total zero point error of a Coriolis mass flow meter comprises: exciting a vibration of a bending vibration mode; measuring a first total zero point error T at a flow of zero; ascertaining a first damping value D of the vibration of the bending vibration mode; measuring an exciter-independent zero point error I during a decaying vibration of the bending vibration mode at a flow of zero; ascertaining a first exciter-dependent contribution E to the first total zero point error T based on the first total zero point error T and based on the exciter-independent zero point error I; and ascertaining a sensitivity factor S for the bending vibration mode based on the first exciter-dependent contribution E to the total zero point error T and based on the first damping value D.
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公开(公告)号：US20230168115A1
公开(公告)日：2023-06-01
申请号：US17995176
申请日：2021-03-08
Applicant: Endress+Hauser Flowtec AG
Inventor： Johan Pohl , Hao Zhu
CPC classification number: G01F1/8436 , G01F1/8427 , G01F1/8422 , G01F25/10 , G01F15/022 , G01F1/8477 , G01F15/06
Abstract: A method for operating a Coriolis measurement device comprises the following steps: recording the measured voltages of sensors for sensing measuring tube vibrations and creating an asymmetric sequence of values by way of the amplitudes of the measured voltages for the purpose of diagnosing the Coriolis measurement device, recording at least one stabilization variable and creating a stabilized asymmetric sequence of values based on the stabilization variable, wherein the stabilization variable is one of the following variables or a first or further temporal derivative thereof: a resonant frequency of the measuring tube containing medium or a variable derived therefrom, time or phase difference between measurement signals from the first sensor and the second sensor or a variable derived therefrom, temperature of the measuring tube wall, temperature difference between two measurement points of the measuring tube wall.
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