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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：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：US11073499B2
公开(公告)日：2021-07-27
申请号：US16302769
申请日：2017-04-17
Applicant: Endress+Hauser Flowtec AG
Inventor： Alfred Rieder , Gerhard Eckert , Ennio Bitto , Hao Zhu
Abstract: A measuring transducer includes a support body, a curved oscillatable measuring tube, an electrodynamic exciter, at least one sensor for registering oscillations of the measuring tube, and an operating circuit. The measuring tube has first and second bending oscillation modes, which are mirror symmetric to a measuring tube transverse plane and have first and second media density dependent eigenfrequencies f1, f3 with f3>f1. The measuring tube has a peak secant with an oscillation node in the second mirror symmetric bending oscillation mode. The operating circuit is adapted to drive the exciter conductor loop with a signal exciting the second mirror symmetric bending oscillation mode. The exciter conductor loop has an ohmic resistance RΩ and a mode dependent mutual induction reactance Rg3 which depends on the position of the exciter. The exciter is so positioned that a dimensionless power factor pc 3 = 4 · R Ω · R g 3 ( R Ω + R g 3 ) 2 has a value of not less than 0.2.
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公开(公告)号：US10724883B2
公开(公告)日：2020-07-28
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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5.发明授权公开(公告)号：US11573111B2
公开(公告)日：2023-02-07
申请号：US16315834
申请日：2017-06-26
Applicant: Endress + Hauser Flowtec AG
Inventor： Alfred Rieder , Gerhard Eckert , Ennio Bitto , Hao Zhu
Abstract: The measuring system includes a transducer apparatus with two tubes. Each tube is adapted to be flowed through by a fluid from an inlet end toward an outlet end and to be caused to vibrate. An electromechanical exciter mechanism excites and maintains mechanical oscillations of each of the tubes, and a sensor arrangement registers mechanical oscillations of at least one of the tubes. The transducer apparatus includes two temperature sensors each being mechanically and thermally conductively coupled with a wall of the tube, wherein each of the temperature sensors registers a measuring point temperature, and converts such into a temperature measurement signal temperature. A measuring and operating electronics (ME) generates a transducer temperature measured value representing a transducer apparatus temperature so that a magnitude of the transducer temperature measured value is greater than a magnitude of the measuring point temperature and less than a magnitude of the measuring point temperature.
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Patent Agency Ranking
公开(公告)号：US20220236160A1
公开(公告)日：2022-07-28
申请号：US17612540
申请日：2020-04-15
Applicant: Endress+Hauser Flowtec AG
Inventor： Hao Zhu , Gerhard Eckert , Ennio Bitto , Alfred Rieder , Marc Werner
Abstract: A measuring transducer includes a tube assembly including two pair of structurally identical tubes, each connected at their respective ends to each of two flow dividers, thereby forming four parallel flow paths, and each including alternating, adjoining straight and arcuate segments, wherein each of the first and third arcuate segments has a segment length corresponding to an extended length of a virtual center line of the segment, an arc radius corresponding to a radius of the virtual center line and a center point angle corresponding to a ratio between the segment length and the arc radius, such that each of the first arcuate segments are identical in both shape and size, and such that each of the third arcuate segments are identical in both shape and size, wherein the measuring transducer further includes an exciter assembly and a sensor assembly, each connected to the tube assembly.
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公开(公告)号：US10942058B2
公开(公告)日：2021-03-09
申请号：US16315826
申请日：2017-06-26
Applicant: Endress + Hauser Flowtec AG
Inventor： Alfred Rieder , Gerhard Eckert , Ennio Bitto , Hao Zhu
Abstract: The measuring system comprises a transducer apparatus with two tubes, each having a lumen surrounded by a wall. A fluid flows through each tube, while the tube is vibrated. An electromechanical-exciter mechanism maintains mechanical oscillations of each of the tubes, and a sensor arrangement registers mechanical oscillations of at least one of the tubes. The transducer apparatus includes two temperature sensors, each being mechanically and thermally conductively coupled with a wall of a respective one of the tubes and adapted to register a measuring point temperature and to convert such into a temperature measurement signal. A measuring- and operating electronics is adapted, with application of the temperature measurement signals, to generate a transducer temperature measured value, which represents a transducer apparatus temperature, which deviates both from each of the measuring point temperatures, such that a magnitude of the transducer temperature measured value is between the measuring point temperatures.
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公开(公告)号：US10768034B2
公开(公告)日：2020-09-08
申请号：US16471656
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 measurement sensor of the vibrational type for measuring the density and/or the mass flow of a medium, including: two oscillators; an exciter for stimulating oscillator vibrations; and two vibration sensors, wherein the first oscillator includes first and second measuring tubes and a first resilient vibration coupler for coupling the measuring tubes, wherein the second oscillator includes third and fourth measuring tubes and a second resilient vibration coupler for coupling the third and fourth measuring tubes, wherein perpendicularly to a measuring tube transverse plane a measurement sensor longitudinal plane extends between the third and the fourth measuring tube, wherein the first and third measuring tube relative to a measurement sensor longitudinal plane are in mirror symmetry relative to one another, and wherein the second and fourth measuring tube relative to the measurement sensor longitudinal plane are in mirror symmetry relative to one another.
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公开(公告)号：US10466151B2
公开(公告)日：2019-11-05
申请号：US15540046
申请日：2015-11-18
Applicant: Endress + Hauser Flowtec AG
Inventor： Gerhard Eckert , Alfred Rieder , Hao Zhu
Abstract: A method is provided for measuring density of a fluid by means of at least one at least sectionally curved measuring tube. The measuring tube is adapted to be flowed through by the fluid and concurrently to be caused to vibrate over a wanted oscillatory length, namely a tube length measured from a first tube end to a second tube end, a length which is greater than a minimum separation of the second tube end from the first tube end. According to the invention, among other things, also a tilt measured value representing an inclination of the at least one measuring tube in the static resting position relative to a local acceleration of gravity is ascertained, in such a manner that such represents an angle of intersection between a direction vector of an imaginary first reference axis (y-axis) and a direction vector of an imaginary second reference axis (g-axis). The first reference axis is so selected that it is perpendicular to an imaginary third reference axis (z-axis) imaginarily connecting the first tube end and the second tube end and points in the direction of a peak of the at least one measuring tube farthest from the third reference axis in the static resting position, while the second reference axis is so selected that it extends through a shared intersection of the first and third reference axes and points in the vertical direction, namely in the direction of the local acceleration of gravity. The tilt measured value is used together with a parameter measured value representing an oscillation frequency of the at least one measuring tube for ascertaining at least one density measured value representing the density of the fluid.
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公开(公告)号：US20190162702A1
公开(公告)日：2019-05-30
申请号：US16302769
申请日：2017-04-27
Applicant: Endress+Hauser Flowtec AG
Inventor： Alfred Rieder , Gerhard Eckert , Ennio Bitto , Hao Zhu
Abstract: A measuring transducer includes a support body, a curved oscillatable measuring tube, an electrodynamic exciter, at least one sensor for registering oscillations of the measuring tube, and an operating circuit. The measuring tube has first and second bending oscillation modes, which are mirror symmetric to a measuring tube transverse plane and have first and second media density dependent eigenfrequencies f1, f3 with f3>f1. The measuring tube has a peak secant with an oscillation node in the second mirror symmetric bending oscillation mode. The operating circuit is adapted to drive the exciter conductor loop with a signal exciting the second mirror symmetric bending oscillation mode. The exciter conductor loop has an ohmic resistance RΩ and a mode dependent mutual induction reactance Rg3 which depends on the position of the exciter. The exciter is so positioned that a dimensionless power factor pc 3 = 4 · R Ω · R g 3 ( R Ω + R g 3 ) 2 has a value of not less than 0.2.
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