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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
发明人： Alfred Rieder , Hao Zhu , Michael Wiesmann
摘要： 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：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：US20240011882A1
公开(公告)日：2024-01-11
申请号：US18254469
申请日：2021-10-28
发明人： Alfred Rieder
CPC分类号： G01N11/16 , G01N9/32 , G01F15/024 , G01F1/8436 , G01F1/8422 , G01F1/8431 , G01N2009/006
摘要： A method for determining a viscosity measurement value of a medium conducted within an oscillatory measuring tube includes exciting at least one oscillation mode of the measuring tube; determining a natural frequency of the oscillation mode; determining the density of the medium; determining the damping of the oscillation mode; and determining the viscosity measurement value depending on the density, the natural frequency, and the damping of the oscillation mode, wherein the viscosity measurement value is determined, depending on a specification of the type of medium, with a model corresponding to the specification.
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64.发明公开公开(公告)号：US20230349771A1
公开(公告)日：2023-11-02
申请号：US18006437
申请日：2021-06-21
发明人： Mattia Alioli , Vivek Kumar , Alfred Rieder , Gerhard Eckert
CPC分类号： G01K1/143 , G01F1/8427 , G01K13/02 , G01F1/34
摘要： A method includes: determining a wall temperature of a wall enclosing a lumen of a flow line; determining a density, a viscosity, a thermal conductivity, a thermal capacity, and a pressure differential of a medium to be measured flowing in the line; determining a characteristic number value for the medium, which characterizes a heating of the medium flowing in the line as a result of dissipation and is a function of an Eckert number, a Prandtl number, and a pressure loss coefficient of the line as well as line-specific first, second and third exponents; and determining a temperature of the medium using the characteristic number value and the wall temperature. A measuring system for the method includes: a temperature sensor thermally coupled to a lateral surface of the wall and configured to generate a temperature measurement signal; and an operating electronic system electrically connected to the temperature sensor.
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公开(公告)号：US20230341247A1
公开(公告)日：2023-10-26
申请号：US18002244
申请日：2021-06-15
发明人： Michael Kirst , Alfred Rieder
CPC分类号： G01F1/8431 , G01F1/8436 , G01F25/10
摘要： The measuring system comprises a vibration-type transducer (10) and measuring system electronics (20) electrically coupled to the transducer (10) for controlling the transducer and for evaluating vibration measurement signals (s1, s2) provided by the transducer. The exciter assembly comprises a vibration exciter (31) which is designed to convert electrical power with an electrical current that changes over time into mechanical power, in such a way that, at a drive point, formed by the vibration exciter on the tube that is mechanically connected to the vibration exciter, a drive force that changes over time acts on the tube, wherein the vibration exciter (31) is positioned and designed such that a drive offset (ΔE), namely a smallest distance between a drive cross-sectional area of the tube surrounded by a notional circumferential line of the tube intersecting the drive point and a predefined reference cross-sectional area of the tube, is no more than 3° mm and/or less than 0.5% of the tube length, and wherein a vibration node of vibration movements formed between two vibration antinodes of said vibration movements of the at least one tube in a vibration mode of a second or higher order (deviating from a vibration mode of a first order) lies within the reference cross-sectional area. The measuring system electronics (20) is designed to feed electrical power into the vibration exciter (31) by means of an electrical drive signal (e1), having an electrical current that changes over time, in such a way that the tube performs forced mechanical vibrations with one or more vibration frequencies specified by the drive signal (e1), wherein the measuring system electronics both provides the drive signal (e1) with sinusoidal (useful) current components (eN1, eN2) having an (alternating current) frequency (feN1) or an (alternating current) frequency (feN2), in such a way that the (alternating current) frequency (feN1) deviates from a resonant frequency (f2n+1) of a vibration mode of an odd-numbered order naturally intrinsic to the tube and the (alternating current) frequency (feN2) deviates from a resonant frequency (f2n+2) of a vibration mode of an even-numbered order naturally intrinsic to the tube by less than 1% and/or by less than 1 Hz, and also determines measurement values for at least one flow parameter of a measuring material guided in the transducer based on corresponding useful signal components (s1N1; s2N1; s1 N2; s2N2) of at least one of the vibration measurement signals (s1, s2).
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公开(公告)号：US20220364895A1
公开(公告)日：2022-11-17
申请号：US17621306
申请日：2020-05-26
发明人： Hao Zhu , Alfred Rieder , Martin Josef Anklin , Reinhard Huber , Yaoying Lin
摘要： 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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公开(公告)号：US20220307886A1
公开(公告)日：2022-09-29
申请号：US17639020
申请日：2020-08-03
发明人： Alfred Rieder , Vivek Kumar , Mattia Alioli
摘要： A method for determining a viscosity of a medium based on damping of an oscillation mode of a measurement tube comprises exciting oscillations of an oscillation mode; detecting a sequence of provisional damping measurement values for the measurement tube oscillation mode; and calculating target measurement values. The influence of the cross-sensitivity of the damping for the flow rate of the medium is corrected by determining rectified damping measurement values that correspond to damping when the medium is at rest and determining viscosity on the basis of the rectified damping measurement values, or correcting the influence of the cross-sensitivity of the damping for the flow rate of the medium by determining provisional intermediate values of a damping-dependent variable, determining rectified intermediate values that correspond to the intermediate values when the medium is at rest, and determining the target measurement values on the basis of the rectified intermediate values.
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公开(公告)号：US20220291032A1
公开(公告)日：2022-09-15
申请号：US17607962
申请日：2020-03-31
发明人： Hao Zhu , Alfred Rieder , Yaoying Lin
摘要： The disclosure relates to a measuring device for characterizing a non-homogeneous, flowable medium, and for determining the density, the mass flow rate and/or the viscosity of the medium measuring tube for guiding the medium natural frequency of which depends on the density of the medium. An exciter for exciting the mode of oscillation and an operation and evaluation circuit designed to apply an excitation signal to the exciter, to capture signals from the oscillation sensor, to determine current values of the natural frequency of the oscillator and fluctuations of the natural frequency on the basis of the signals from the oscillation sensor.
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公开(公告)号：US20220065676A1
公开(公告)日：2022-03-03
申请号：US17414378
申请日：2019-12-17
发明人： Alfred Rieder , Vivek Kumar , Josef Hubensteiner , Mattia Alioli
摘要： A vibronic measurement sensor includes two measuring tubes for conveying the medium and two temperature sensors, each arranged on a surface portion of the measuring tubes, respectively, wherein: centroids of the two surface portions relative to an intersection line between a longitudinal plane of symmetry and the transverse plane of symmetry of the sensor are rotationally symmetrical to one another; the first centroid lies in a first section plane running perpendicular to a measuring tube center line of the first measuring tube, wherein an intersection point of the measuring tube center line with the first intersection plane is defined; and the first centroid is arranged relative to the intersection point of the measuring tube center line such that a measurement accuracy of the sensor is largely independent of the installation position, even when inhomogeneous temperature distributions are formed over measuring tube cross-sections at low Reynolds numbers.
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公开(公告)号：US20220065674A1
公开(公告)日：2022-03-03
申请号：US17416038
申请日：2019-11-11
IPC分类号： G01F1/84
摘要： A Coriolis mass flow meter comprises a vibration element, an exciter assembly, a sensor assembly, and an electronic transformer circuit electrically coupled to the exciter assembly and the sensor assembly. The vibration element is contacted by the flowing fluid. The exciter assembly is designed to convert electric power into mechanical power to produce mechanical vibrations of the vibration element. The transformer circuit generates an electric driver signal and feeds electric power to the exciter assembly. The vibration element mechanically vibrates with a vibration frequency specified by the electric driver signal. The sensor assembly has two electrodynamic vibration sensors designed to convert vibrational movements of the vibration element at a first or at a second measurement point into electric vibration measurement signals having an AC voltage component with a frequency and with an amplitude based on the frequency and on a magnetic flux flowing through the respective vibration sensor.
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