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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 6535. Отображено 100.
02-11-2020 дата публикации

Вибрационный измерительный преобразователь

Номер: RU0000200609U1
Автор: Алексей Анатольевич Воронцов
Принадлежит: Алексей Анатольевич Воронцов

Полезная модель относится к приборостроению в области измерения плотности и массового расхода жидкостей вибрационным способом в условиях работы с вязкими и абразивными жидкостями, находящимися под высоким давлением, например для использования с цементными и буровыми растворами. Устройство состоит из двух измерительных трубок, расположенных параллельно друг другу, скрепленных между собой узловыми элементами и соединенными с конечными элементами, контроллера, драйвера и одного или двух сенсоров, защитного кожуха. При этом в одном конечном элементе установлен датчик давления с нормализованным выходным сигналом и открытой измерительной мембраной, непосредственно контактирующей с рабочей средой. Технический результат заключается в повышение точности измерений. 2 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 200 609 U1 (51) МПК G01F 1/84 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК G01F 1/84 (2020.08) (21)(22) Заявка: 2020125335, 22.07.2020 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Воронцов Алексей Анатольевич (RU) Дата регистрации: 02.11.2020 Приоритет(ы): (22) Дата подачи заявки: 22.07.2020 (45) Опубликовано: 02.11.2020 Бюл. № 31 2 0 0 6 0 9 R U (54) ВИБРАЦИОННЫЙ ИЗМЕРИТЕЛЬНЫЙ ПРЕОБРАЗОВАТЕЛЬ (57) Реферат: Полезная модель относится к и соединенными с конечными элементами, приборостроению в области измерения плотности контроллера, драйвера и одного или двух и массового расхода жидкостей вибрационным сенсоров, защитного кожуха. При этом в одном способом в условиях работы с вязкими и конечном элементе установлен датчик давления абразивными жидкостями, находящимися под с нормализованным выходным сигналом и высоким давлением, например для использования открытой измерительной мембраной, с цементными и буровыми растворами. непосредственно контактирующей с рабочей Устройство состоит из двух измерительных средой. Технический результат заключается в трубок, расположенных параллельно ...

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Номер записи: 1
26-01-2012 дата публикации

Applications for real-time mass ratio, mass flow and particle size measurement of particle laden flows

Номер: US20120017699A1
Автор: Alex Van Der Spek, Daniel L. Gysling, Douglas H. Loose
Принадлежит: Cidra Corporated Services LLC

Techniques are provided for monitoring particle laden flows in a pipe, that include receiving signalling containing information about a parameter related to a particle laden flow in a pipe, the parameter including either (a) a sound level propagating through the particle laden flow in the pipe, or (b) a static pressure due to an acceleration of the particle laden flow in the pipe; and determining a measurement of a particle size and either a mass flow rate, or a particle-to-air mass ratio, or both the mass flow rate and the particle-to-air mass ratio, associated with the particle laden flow, based at least partly on a change in the parameter.

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Номер записи: 2
23-02-2012 дата публикации

Multiphase flow meter for subsea applications using hydrate inhibitor measurement

Номер: US20120046870A1
Автор: Babajide Adejuyigbe, John Lievois, VIJAY Ramakrishnan
Принадлежит: Individual

Methods and apparatus for determining phase fractions (relative concentrations) within a multiphase fluid mixture, in the presence of an injected hydrate inhibitor. Combining this phase fraction information with a hydrate inhibitor injection rate (HIIR) enables resolving oil and water flow rates for the phase fractions. The liquid flow rates and a total combined flow rate of the fluid mixture—determined based on a differential pressure of the fluid mixture through a given area—enable resolving a gas flow rate.

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Номер записи: 3
15-03-2012 дата публикации

Method for detecting plugging in a coriolis flow measuring device

Номер: US20120060626A1
Автор: Alfred Rieder, Hao Zhu, Wolfgang Drahm
Принадлежит: Endress and Hauser Flowtec AG

A method for detecting complete or partial plugging of a measuring tube of a Coriolis flow measuring device, which is insertable into a pipeline, and which has a measuring transducer of the vibration type having at least two measuring tubes connected for parallel flow. The method includes, in such case, the steps of measuring a subset flow occurring in a subset of the measuring tubes, and comparing a subset flow value obtained from this measurement with a reference value to be expected for this subset. The reference value is, in such case, determined from a total mass flow determined in the context of a Coriolis mass flow measuring. Additionally, the method includes the step of detecting plugging of at least one measuring tube of the measuring transducer, if the subset flow value deviates from the reference value by more than a limit value.

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Номер записи: 4
05-04-2012 дата публикации

Coriolis mass flowmeter

Номер: US20120079891A1
Автор: Tao Wang, Yousif Hussain
Принадлежит: KROHNE AG

A Coriolis mass flowmeter having at least four measuring tubes running parallel, the measuring tubes being joined in pairs into a oscillation unit by being inserted in openings in a holding device ( 1 ) and wherein at least part of either a sensor or actuator device is attached to the holding device ( 1 ). A Coriolis mass flowmeter that has an increased measuring accuracy is implemented in that the measuring tube central axes ( 3 ) of a measuring tube pair span a common plane (E), that the holding device ( 1 ) has at least two attachment extensions ( 4 ), that the attachment extensions ( 4 ) extend across the common plane (E) and that the holding devices ( 1 ) with the attachment extensions ( 4 ) are mirror symmetric relative to the common plane (E) in respect to their projection viewed in the direction of the measuring tube central axes ( 3 ).

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Номер записи: 5
26-07-2012 дата публикации

Mass Flow Meter

Номер: US20120186361A1
Автор: Felix Ernst Schmid
Принадлежит: MEGGITT SA

A mass flow meter comprising a housing including a fluid inlet and a fluid outlet. The housing defines a chamber and a rotatable member is arranged in the chamber so as to be rotatable about an axis. A momentum device is also arranged in the chamber and connected to the rotatable member via a biasing element so as to be rotatable about the axis and rotatable relative to the rotatable member. A fluid path in fluid communication with the fluid inlet and the fluid outlet is provided. The fluid path passes through both the rotatable member and the momentum device. The fluid path enters the momentum device at a radial distance r 1 from the axis and exits the momentum device at a different radial distance r 2 from the axis. A torque provider may be coupled to the rotatable member via a shaft or gear member.

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Номер записи: 6
23-08-2012 дата публикации

Pump Tester

Номер: US20120215466A1
Автор: Karl A. Ruiter, Mirik Hovsepian
Принадлежит: Pronk Technologies Inc

Methods of and devices for testing medical pumps via tracking induced single or multiple bubble trajectories within a fluid flow conduit ( 60 ) and methods of synchronized ( 600 ) corrections ( 604 ) of flow data estimates.

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Номер записи: 7
13-09-2012 дата публикации

Vibratory flowmeter friction compensation

Номер: US20120232811A1
Автор: Anthony William Pankratz, Joel Weinstein
Принадлежит: Micro Motion Inc

The invention relates to meter electronics (20) for vibratory flowmeter friction compensation is provided. The meter electronics (20) includes an interface (201) configured to communicate with a flowmeter assembly (10) of a vibratory flowmeter (5) and receive a vibrational response and a processing system (203) coupled to the interface (201) and configured to measure a mass flow rate of a fluid using the vibrational response. The processing system (203) is configured to determine a fluid velocity (V) using the mass flow rate, a fluid density (ρ), and a cross-sectional flow area (A), determine a friction factor (f) using the fluid velocity (V) and a pressure drop (ΔP), and determine a compensation factor using the friction factor (f). The invention also relates to a vibratory flowmeter compensation method.

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Номер записи: 8
11-10-2012 дата публикации

Method for Trimming a Tube

Номер: US20120255370A1
Автор: Alfred Rieder, Michael Wiesmann, Wolfgang Drahm
Принадлежит: Endress and Hauser Flowtec AG

A method for trimming a tube with at least one stiffening element placed on its tube wall to a target bending stiffness, wherein the tube has first an interim bending stiffness, which is greater than the target bending stiffness. For the purpose of reducing the interim bending stiffness of the tube to the target bending stiffness, it is provided in the method of the invention that volume of the stiffening element is removed, for instance, by means of a laser.

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Номер записи: 9
18-10-2012 дата публикации

Microfluidic device and method of use

Номер: US20120260718A1
Автор: Douglas Ray Sparks, Nader Najafi, Richard Thayre Smith
Принадлежит: Integrated Sensing Systems Inc

A microfluidic device and sensing method that utilize a resonating tube configured to have sufficient sensitivity to be capable of sensing the volume of a gas present as bubbles in a liquid or the flow rate and/or density of a gas or gas mixture flowing through the tube. The tube has a freestanding tube portion supported above a surface of a substrate so as to be capable of vibrating in a plane normal to the surface of the substrate. As a gas-containing fluid flows through an internal passage of the tube, a drive signal vibrates the freestanding tube portion at a resonant frequency thereof. Coriolis-induced deflections of the freestanding tube portion are sensed relative to the substrate to produce an output corresponding to the sensed deflections, and the drive signal and/or the output are assessed to determine the volume, density and/or flow rate of the gas of the gas-containing fluid.

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Номер записи: 10
03-01-2013 дата публикации

Startup and operational techniques for a digital flowmeter

Номер: US20130000418A1
Автор: Manus P. Henry, Mayela E. Zamora
Принадлежит: Invensys Systems Inc

Startup and operational techniques for a digital flowmeter are described. For example, during a startup operation of the flowmeter, the mode of operation might include a random sequence mode, in which filtered, random frequencies are applied as a drive signal to a flowtube associated with the digital flowmeter. Once the flowtube reaches a resonant mode of vibration, the digital flowmeter may transition to a positive feedback mode, in which a sensor signal representing a motion of the flowtube is fed back to the flowtube as a drive signal. In a digital synthesis mode of operation, the analyzed sensor signals are used to synthesize the drive signal. The digital flowmeter may revert to a previous mode to regain stable and desired oscillation of the flowtube, such as might be required during a recovery operation associated with a disturbance to an operation of the digital flowmeter.

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Номер записи: 11
07-03-2013 дата публикации

Method for Operating a Coriolis Mass Flow Rate Meter and Coriolis Mass Flow Rate Meter

Номер: US20130055827A1
Автор: Felix Hammacher, Henning Lenz, Thomas Bierweiler, Wolfgang Ens
Принадлежит: SIEMENS AG

A method for operating a Coriolis mass flow rate meter and a Coriolis mass flow rate meter including an evaluation device, a measuring tube having a medium flowing therethrough and which is excited so as to perform oscillations, and at least two spaced oscillation pickups spaced apart in the longitudinal direction of the measuring tube to each generate an oscillation signal, wherein a first indicator variable based on the damping of the oscillations of the measuring tube is initially used to detect deposits in the measuring tube and if, based on the first indicator variable, increased damping is established, a second indicator variable is used, which is based on the manifestation of harmonics in the frequency spectrum of an oscillation signal such that reliable detection of deposits and therefore an indication of the state of meters and pipelines in a process engineering installation are advantageously possible.

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Номер записи: 12
14-03-2013 дата публикации

System and method for measuring product flow to an agricultural implement

Номер: US20130061789A1
Автор: Jim Henry, Pana Binsirawanich, Scott David Noble
Принадлежит: CNH Canada Ltd

An agricultural implement system is provided including a fluid conduit configured to provide product to a ground engaging tool. The ground engaging tool is configured to deposit the product into soil. The agricultural implement system also includes an air source fluidly coupled to the fluid conduit, and configured to provide an air flow through the fluid conduit in a downstream direction toward the ground engaging tool. The agricultural implement system further includes a product delivery system fluidly coupled to the fluid conduit, and configured to transfer the product into the air flow. In addition, the agricultural implement system includes a product flow measurement system configured to determine a mass flow rate of the product based on a pressure drop between an upstream portion of the fluid conduit and a downstream portion of the fluid conduit, a flow rate of the air flow, and a velocity of the air flow.

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Номер записи: 13
09-05-2013 дата публикации

CORIOLIS MASS FLOW METER AND COMPONENTS THEREOF

Номер: US20130112009A1
Автор: Gabai Ran, Mokady Tal
Принадлежит: PRECIM LTD.

A Coriolis mass flow meter and components thereof. One such component being a conduit having an inlet, an outlet, and a curved shape extending therebetween, and defining therein a flow path lying in an imaginary plane. The inlet and outlet each have an internal cross-sectional area having a first dimension in a direction along the plane and a second dimension in a direction perpendicular thereto. The first and second dimensions are the largest dimensions of each internal cross sectional area in the respective directions. The first dimension having a different magnitude of length than the second dimension. 1. A Coriolis mass flow meter conduit , comprising:an inlet, an outlet, and a curved shape extending therebetween, and defining therein a flow path lying in an imaginary plane;wherein the inlet and outlet each have an internal cross-sectional area having a first dimension in a direction along the plane and a second dimension in a direction substantially perpendicular thereto; the first and second dimensions being the largest dimensions of each internal cross sectional area in the respective directions; the first dimension having a different magnitude of length than the second dimension;wherein the conduit has an inlet end having a diameter D, a maximal width W in a direction substantially perpendicular to the first and second dimensions of the internal cross sectional area of the inlet and outlet, and a maximal height H in a direction substantially parallel with the first dimension of the internal cross sectional area, the conduit fulfilling the conditions H<4D and W<6.25D.2. The Coriolis mass flow meter conduit of claim 1 , wherein the inlet and outlet each have an external cross-sectional area having a first dimension in a direction along the plane and a second dimension in a direction substantially perpendicular thereto; the first and second dimensions being the largest dimensions of each external cross sectional area in the respective directions; the first ...

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Номер записи: 14
09-05-2013 дата публикации

Brace bar with a reduced coupling gap

Номер: US20130112304A1
Автор: Christopher A. Werbach, Gregory Treat Lanham, Richard L. Woolf
Принадлежит: Micro Motion Inc

A brace bar ( 200 ) is provided. The brace bar ( 200 ) includes a brace bar plate ( 206 ). At least one aperture ( 201 ) is formed in the brace bar plate ( 206 ). The brace bar ( 200 ) also includes at least one tab ( 202 ) located proximate the at least one aperture ( 201 ) and extending from the brace bar plate ( 206 ).

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Номер записи: 15
16-05-2013 дата публикации

Multi-measurement vortex flowmeter

Номер: US20130119964A1
Автор: James H. Vignos, Joseph J. Lewicke, Peter E. Allstrom, Warren E. Cook
Принадлежит: Invensys Systems Inc

Two-wire transmitters are described in which the required voltage that a control room must supply to the transmitter is lower at high current than at low current, thus freeing up more voltage for other uses, and in which a constant set of operating voltages may be maintained. A corrected pressure in a vortex flow meter may be determined that reflects the mass flow rate. Thus, the mass flow rate may be determined based on the corrected pressure reading and a measured volumetric flow rate. Density may be determined from pressure and temperature using a table containing error values based on a standard density determination and a relatively simple approximation. During operation of a flow meter, the stored error values may be linearly interpolated and the approximation may be computed to determine the density from the stored error value.

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Номер записи: 16
16-05-2013 дата публикации

Method and apparatus for determining a temperature of a vibrating sensor component of a vibrating meter

Номер: US20130121376A1
Автор: William M Mansfield
Принадлежит: Micro Motion Inc

A method for determining a temperature of a vibrating sensor component ( 204 A, 205 A, 205′A) coupled to a conduit ( 203 A, 203 B) of a vibrating meter ( 200 ) is provided. The method comprises a step of supplying the vibrating sensor component ( 204 A, 205 A, 205 ′A) with a temperature determination signal ( 313 ). The method also comprises a step of measuring a resulting signal ( 314 ). The method further comprises a step of determining a temperature of the sensor component ( 204 A, 205 A, 205 ′A) based on the temperature determination signal ( 313 ) and the resulting signal ( 314 ).

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Номер записи: 17
23-05-2013 дата публикации

METHOD FOR DETERMINING A RESULTING TOTAL MASS FLOW TO AN EXHAUST GAS MASS FLOW SENSOR

Номер: US20130132003A1
Автор: GRIMM KARSTEN, NIGRIN SVEN, Toennesmann Andres
Принадлежит:

A method for determining a resulting total mass flow to an exhaust gas mass flow sensor involves providing an exhaust gas mass flow sensor comprising a first sensor element and a second sensor element. The second sensor element comprises a first temperature sensor and a second temperature sensor arranged in a row in an exhaust flow direction. A specific heat output is determined at the exhaust gas mass flow sensor with the first sensor element and the second sensor element. A value of a summed mass flow is determined from a stored first characteristic map, a specific heat output being a function of the value. A normalized temperature gradient is determined. A back flow portion is determined from a stored second characteristic map, the back flow portion being a function of the specific heat output in dependence on the normalized temperature gradient. The resulting total mass flow is determined. 16-. (canceled)8. The method as recited in claim 7 , wherein claim 7 , for determining the specific heat output at the exhaust gas mass flow sensor claim 7 , the method further comprises:determining a temperature of an exhaust gas with the first sensor element; andheating the second sensor element arranged downstream of the first sensor element to a temperature which is higher than the temperature of the exhaust gas flowing by so that the exhaust gas flowing by the second sensor element causes a heat loss,wherein the specific heat output is defined as a ratio of an output delivered by the second sensor element to a temperature difference between the second sensor element and the first sensor element.9. The method as recited in claim 7 , wherein the temperature value of the second sensor element is determined via an arithmetic average of the measured temperature value(s) of the first temperature sensor and the measured temperature value(s) of the second temperature sensor.10. The method as recited in claim 7 , wherein the second characteristic map is determined by ...

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Номер записи: 18
30-05-2013 дата публикации

MEASURING SYSTEM FOR MEDIA FLOWING IN A PIPELINE

Номер: US20130133436A1
Автор: Anklin-Imhof Martin, BITTO Ennio, HUBER Christof, Kirst Michael, RIEDER Alfred
Принадлежит: Endress + Hauser Flowtec AG

The measuring system comprises: a measuring transducer, for producing oscillatory signals dependent on a viscosity of the flowing medium and/or a Reynolds number of the flowing medium; transmitter electronics for driven the measuring transducer and for evaluating oscillatory signals delivered by the measuring transducer. The measuring transducer includes: an inlet-side flow divider; an outlet-side flow divider; at least two, mutually parallel, straight, measuring tubes, connected to the flow dividers; and an electromechanical exciter mechanism for exciting and maintaining mechanical oscillations of the two measuring tubes. Each of the two measuring tubes opens with an inlet-side measuring tube end into a flow opening and with an outlet-side. The transmitter electronics feeds, by means of an electrical driver signal supplied to the exciter mechanism, electrical excitation power into the exciter mechanism, while the exciter mechanism converts electrical excitation power partially into opposite-equal torsional oscillations of the at least two measuring tubes. 152-. (canceled)53. A method for determining the viscosity of a medium with a Coriolis mass flowmeter having at least two measuring tubes through which a medium can flow and a measuring device having at least two actuator assemblies , the actuator assemblies being arranged on both sides of a measuring tube plane defined by a central axis of the measuring tubes and outside of the measuring tube plane , comprising the steps of:exciting the measuring tubes with the measuring device to an oppositely directed torsional oscillation with the actuator assemblies being alternately actuated in opposing effective directions anddetermining at least the viscosity of the medium by evaluation of measured values obtained from the measuring device, said measured values comprising the amplitude of torsional oscillation reached, wherein the amplitude of torsional oscillation reached is evaluated for determining the viscosity of the ...

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Номер записи: 19
06-06-2013 дата публикации

Coriolis mass flow meter

Номер: US20130139612A1
Автор: Tao Wang, Yousif Hussain
Принадлежит: KROHNE AG

A Coriolis mass flow meter ( 1 ) which has at least two curved measurement tubes ( 2 ), at least one actuator arrangement, at least one sensor arrangement and comprising at least one housing structure ( 5 ), the measurement tubes ( 2 ) being connected at their inlet end portion and an outlet end portion with at least a first oscillation node plate ( 3 ) and a second oscillation node plate ( 4 ). The flow meter achieves increased measurement accuracy and a reduced susceptibility to perturbing oscillations by at least one of the oscillation node plates being connected at the inlet end and the outlet end of the housing structure ( 5 ). A third oscillation node plate ( 6 ) can be additionally arranged on the inlet end portion and the outlet end portion of the tubes, the third oscillation node plate being connected to the housing structure.

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Номер записи: 20
06-06-2013 дата публикации

Thermal stress compensation in a curved tube vibrating flow meter

Номер: US20130139613A1
Автор: Craig Brainerd Van Cleve
Принадлежит: Micro Motion Inc

A curved tube vibrating flow meter ( 5 ) includes a flow tube temperature sensor T T ( 190 ) and a plurality of case temperature sensors T C ( 303 ) affixed to one or more case locations of a case ( 300 ) of the curved tube vibrating flow meter ( 5 ). The plurality of case temperature sensors T C ( 303 ) generate a case temperature signal, wherein a plurality of case temperature sensor resistances at the one or more case locations form a combined case resistance related to thermal importances of the one or more case locations. Meter electronics ( 20 ) receives the flow tube temperature signal, receives the case temperature signal, and compensates the curved tube vibrating flow meter ( 5 ) for thermal stress using the flow tube temperature signal and the case temperature signal.

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Номер записи: 21
13-06-2013 дата публикации

Correcting For Two-Phase Flow In A Digital Flowmeter

Номер: US20130145863A1
Автор: De La Fuente Maria Jesus, Henry Manus P.
Принадлежит: INVENSYS SYSTEMS, INC.

A flowmeter is disclosed. The flowmeter includes a vibratable conduit, and a driver connected to the conduit that is operable to impart motion to the conduit. A sensor is connected to the conduit and is operable to sense the motion of the conduit and generate a sensor signal. A controller is connected to receive the sensor signal. The controller is operable to detect a single-phase flow condition and process the sensor signal using a first process during the single-phase flow condition to generate a validated mass-flow measurement. The controller is also operable to detect a two-phase flow condition and process the sensor signal using a second process during the two-phase flow condition to generate the validated mass-flow measurement. 1a vibratable conduit;a driver connected to the conduit and operable to impart motion to the conduit;a first sensor connected to the conduit and operable to sense the motion of the conduit and generate a first sensor signal representative of said sensed motion, wherein said first sensor signal is a periodic signal having a first amplitude and a first frequency;a second sensor connected to the conduit and operable to sense the motion of the conduit and generate a second sensor signal representative of said sensed motion, wherein said second sensor signal is a periodic signal having a second amplitude and a second frequency; and receive a first sensor signal from the first sensor,', 'receive a second sensor signal from the second sensor;', 'compute a corrected first amplitude as a function of the first amplitude of the received first sensor signal;', 'compute a corrected second amplitude as a function of the second amplitude of the received second sensor signal; and', 'generate a measurement of a property of material flowing through the conduit as a function of the corrected first amplitude and the corrected second amplitude., 'a control and measurement system connected to the driver, the first sensor, and the second sensor, the control ...

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Номер записи: 22
27-06-2013 дата публикации

Method for monitoring oscillation characteristics in a coriolis, flow, measuring device

Номер: US20130160565A1
Автор: Rémy Scherrer
Принадлежит: Endress and Hauser Flowtec AG

A method for monitoring oscillation characteristics in a Coriolis, flow measuring device and to a correspondingly formed, Coriolis, flow measuring device in the case of which an excited oscillatory system is simulated with a digital model, which has at least one fittable parameter. The simulating includes, in such case, excitating the digital model in the same manner as the oscillatory system, calculating a simulation response variable of the simulated oscillations according to the digital model, and, performed over a plurality of signal modulations, iterative conforming of the at least one, fittable parameter in such a manner that the simulation response variable interatively approaches the response variable. Furthermore, it is ascertained whether a corresponding limit value is exceeded by the at least one, interatively ascertained parameter value for the at least one, fittable parameter or by at least one variable derived from the at least one, iteratively ascertained parameter value.

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Номер записи: 23
11-07-2013 дата публикации

METHODS OF MANUFACTURING AND TEMPERATURE CALIBRATING A CORIOLIS MASS FLOW RATE SENSOR

Номер: US20130174670A1
Автор: Knudsen Claus W., Lin Jianren, Young Alan M.
Принадлежит: MALEMA ENGINEERING CORPORATION

A subassembly of a Coriolis flowmeter is fabricated from a single monolithic piece of elastic polymeric material. The subassembly includes two flow-sensitive members and a base integrally connected to the two flow-sensitive members. The two flow-sensitive members include straight sections, and are substantially similar and parallel to each other. Flow passages are drilled along the straight sections of the two flow-sensitive members, and drilled entrances are sealed using the elastic polymeric material. A temperature sensor is fixedly attached to a flow-sensitive member for measuring a temperature of the flow-sensitive member and communicating the temperature to a metering electronics. The metering electronics determines a calibrated flow rate of fluid flowing through the Coriolis flowmeter that accounts for the temperature. 1. A Coriolis flowmeter , comprising:a base comprising openings configured to allow fluid to flow through the Coriolis flowmeter;two flow-sensitive members, each of which comprises one or more straight sections and flow passageways fabricated along centerlines of the straight sections for the fluid to flow through, at least one flow passageway fabricated completely through its corresponding straight section to form an opening, wherein all openings not connecting to the base are sealed, and wherein the two flow-sensitive members are integrally connected to the base, and the two flow-sensitive members and the base are all fabricated from an elastic polymeric material;two motion-responsive sensors each of which is fixedly attached to the two flow-sensitive members and configured to generate signals responsive to relative motions generated by the two flow-sensitive members due to Coriolis force induced by the fluid flowing through the Coriolis flowmeter; andelectronics communicatively connected to the two sensors and configured to receive the signals and generate output information indicative of the flow rate of the fluid that flows through the ...

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Номер записи: 24
08-08-2013 дата публикации

METHOD FOR OPERATING A RESONANCE MEASURING SYSTEM

Номер: US20130199306A1
Автор: Kolahi Kourosh, Storm Ralf
Принадлежит: KROHNE MESSTECHNIK GMBH

A method for operating a Coriolis mass flowmeter in which a simple and reliable detection of a multi-phase flow is implemented by determining at least one first measured value for at least one state variable that is dependent on the amplitude in a multi-phase medium, exciting the measuring tube with the oscillation generator to oscillate at a predetermined oscillation frequency and a first amplitude, and to oscillate with the excitation frequency and a second amplitude, detecting the resulting oscillation of the measuring tube and determining at least a second measured value for the state variable that is dependent on the amplitude in a multi-phase medium from the determined resulting oscillation, and using the deviation of at least one of the first measured value from at least a corresponding second value as an indicator for the presence of a multi-phase flow. 111-. (canceled)12. Method for operating a resonance measuring system having at least one measuring tube with a medium flowing through it , at least one oscillation generator , at least one oscillation sensor , and at least one control and evaluation unit , comprising the steps of:exciting the measuring tube by the oscillation generator to oscillation with a predetermined excitation frequency and a first amplitude,detecting the resulting oscillation of the measuring tube with at least one oscillation sensor,{'sub': 'i', 'using the control and evaluation unit to determine at least one first measured value (x) for at least one state variable (x) that is dependent on the amplitude in a multi-phase medium,'}exciting the measuring tube by the oscillation generator to oscillation with the excitation frequency and a second amplitude which differs from the first amplitude,{'sub': 'j', 'detecting the resulting oscillation of the measuring tube with the second amplitude and using the control and evaluation unit to determine at least a second measured value (x) for the at least one state variable (x) that is dependent ...

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Номер записи: 25
08-08-2013 дата публикации

SYSTEMS AND METHODS FOR DETERMINING A REAL TIME SOLID FLOW RATE IN A SOLID-GAS MIXTURE

Номер: US20130204547A1
Автор: Cai Zili, Chen Yao, Fu Xu, Hu Zhongzhi, Huang Baoming, Zhao Tong
Принадлежит:

A system for determining a real time solid flow rate of a solid-gas mixture is provided. The system includes multiple sensors, a data-fusion unit and an estimating unit. The sensors generate multiple measurement signals for obtaining at least two measured values of the real time solid flow rate. The data-fusion unit receives the measured values and establishes a state-space model based on the measured values. The estimating unit estimates the state-space model to generate an estimated value of the real time solid flow rate. A method for determining a real time solid flow rate of a solid-gas mixture is also presented. 1. A system for determining a real time solid flow rate of a solid-gas mixture , comprising:a plurality of sensors generating a plurality of measurement signals for obtaining at least two measured values of the real time solid flow rate;a data-fusion unit receiving the measured values and establishing a state-space model based on the measured values; andan estimating unit estimating the state-space model to generate an estimated value of the real time solid flow rate.2. The system of claim 1 , further comprising a calculating unit that receives the measurement signals from the sensors to generate at least one of the measured values.3. The system of claim 2 , wherein the sensors comprises a weight sensor which is installed on a sending vessel for storing the solid-gas mixture to measure a mixture weight of the solid-gas mixture; and wherein at least one of measured values is acquired based on the measurement signal generated by the weight sensor.4. The system of claim 3 , wherein the sensors further comprises a temperature sensor and a gauge pressure sensor which are installed on the sending vessel; and wherein the one of measured values is acquired from solid weight loss per time unit which is calculated based on the measurement signals generated by the temperature sensor and a gauge pressure as well as the weight sensor.5. The system of claim 2 , ...

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Номер записи: 26
15-08-2013 дата публикации

Sensor arrangement and method for monitoring an infusion process

Номер: US20130205914A1
Автор: Casper Houmann Jensen
Принадлежит: SIEMENS AG

A sensor arrangement for monitoring an infusion process in a flow channel and a method for monitoring an infusion process in a flow channel are described. The sensor arrangement includes a pressure sensor with a sensor interface and a plug. The plug has an inner cavity with an inlet and an outlet. The inlet of the plug is in flow connection with the flow channel and the outlet of the plug is located at the sensor interface.

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Номер записи: 27
22-08-2013 дата публикации

Digital flowmeter

Номер: US20130213143A1
Автор: David W. Clarke, James H. Vignos, Manus P. Henry
Принадлежит: Invensys Systems Inc

A control and measurement system for a coriolis flowmeter having a flowtube, a driver adapted to vibrate the flowtube, and a pair of sensors adapted to generate signals indicative of movement of the flowtube when it is being vibrated by the driver, wherein the sensors are positioned relative to one another so the signals from the sensors are indicative of a mass flow rate of fluid through the flowtube. A digital drive signal generator is adapted to generate a variable digital drive signal for controlling operation of the driver. The digital drive signal generator can be adapted to cause the driver to resist motion of the flowtube during a first time period and amplify motion of the flowtube during a second time period. The digital drive signal generator can also be adapted to initiate motion of the flowtube by sending one or more square wave signals to the driver.

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Номер записи: 28
22-08-2013 дата публикации

CORIOLIS MASS FLOW METER AND SIGNAL PROCESSING METHOD FOR A CORIOLIS MASS FLOW METER

Номер: US20130218503A1
Автор: DRAUTZ Frank
Принадлежит: ABB TECHNOLOGY AG

Signal processing is disclosed for a Coriolis mass flow meter with one or more measuring tubes and meter electronics, which includes determining relevant modal properties of the flow meter during a measurement process, and adaptively correcting a current measurement result with the relevant modal properties of the flow meter obtained during the measurement process. 1. Signal processing method for a Coriolis mass flow meter with one or more measuring tubes and meter electronics , comprising:determining relevant modal properties of the flow meter during a measurement process; andadaptively correcting a current measurement result of the flow meter with the relevant modal properties of the flow meter obtained during the measurement process.2. Signal processing method according to claim 1 , comprising:determining the relevant modal properties of the flow meter by additionally exciting several different frequencies at least temporarily; andevaluating respective frequency responses.3. Signal processing method according to claim 1 , wherein correcting of the current measurement result comprises:comparing the relevant modal properties of a current state of the flow meter with an initial reference state of the flow meter.4. Signal processing method according to claim 3 , comprising:storing the initial reference state of the flow meter in the meter electronics.5. Signal processing method according to claim 1 , wherein correcting of the current measurement result comprises:comparing the relevant modal properties of a current state of the flow meter with several different reference states of the flow meter.6. Signal processing method according to claim 5 , comprising:storing the several different reference states of the flow meter in the meter electronics.7. Signal processing method according to claim 1 , comprising:detecting secondary measurement quantities using the determined modal properties.8. Signal processing method according to claim 7 , wherein the secondary measurement ...

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Номер записи: 29
29-08-2013 дата публикации

MULTIPLE TEMPERATURE SENSOR SYSTEM

Номер: US20130223480A1
Автор: Hays Paul J, Kravitz Andrew S., McAnally Craig B.
Принадлежит: Micro Motion, Inc.

A multiple temperature sensor system () includes a temperature sensor network () including temperature-sensing resistors Rand R() and frequency-selective filters () coupled to the plurality of temperature-sensing resistors Rand R(). The frequency-selective filters () pass distinct time-varying signals into the temperature sensor network () and pass attenuated distinct time-varying signals out. The system () further includes a temperature measurement N controller () coupled to the temperature sensor network () and configured to inject the distinct time-varying signals into the temperature sensor network (), receive the attenuated distinct time-varying signals in response to the injection, with the attenuated distinct time-varying signals being attenuated by the temperature sensing resistors (), and generate two or more substantially simultaneous temperature values from the attenuated distinct time-varying signals. 1120. A multiple temperature sensor system () , comprising:{'b': '180', 'claim-text': [{'sub': T1', 'T2, 'b': 186', '187, 'a plurality of temperature-sensing resistors Rand R(, ); and'}, {'b': 184', '185', '186', '187', '184', '185', '180', '180, 'sub': T1', 'T2, 'a plurality of frequency-selective filters (, ) coupled to the plurality of temperature-sensing resistors Rand R(, ), with the plurality of frequency-selective filters (, ) passing a plurality of distinct time-varying signals into the temperature sensor network () and passing a plurality of attenuated distinct time-varying signals out of the temperature sensor network (); and'}], 'a temperature sensor network () comprising{'b': 161', '180', '180', '180', '186', '187, 'a temperature measurement controller () coupled to the temperature sensor network () and configured to inject the plurality of distinct time-varying signals into the temperature sensor network (), receive the plurality of attenuated distinct time-varying signals from the temperature sensor network () in response to the injection, ...

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Номер записи: 30
03-10-2013 дата публикации

COMPENSATING FOR FREQUENCY CHANGE IN FLOWMETERS

Номер: US20130255399A1
Автор: Tombs Michael S.
Принадлежит: INVENSYS SYSTEMS, INC.

Motion is induced in a conduit that contains a fluid. The motion is induced such that the conduit oscillates in a first mode of vibration and a second mode of vibration. The first mode of vibration has a corresponding first frequency of vibration and the second mode of vibration has a corresponding second frequency of vibration. At least one of the first frequency of vibration or the second frequency of vibration is determined. A phase difference between the motion of the conduit at a first point of the conduit and the motion of the conduit at a second point of the conduit is determined. A quantity based on the phase difference and the determined frequency is determined. The quantity includes a ratio between the first frequency during a zero-flow condition and the second frequency during the zero-flow condition. A property of the fluid is determined based on the quantity. 14-. (canceled)5. A method comprising:inducing motion in a flowtube containing a fluid such that the flowtube oscillates in a first mode of vibration and a second mode of vibration, the first mode of vibration having a corresponding frequency of vibration and the second mode of vibration having a corresponding frequency of vibration;determining the first frequency of vibration;determining the second frequency of vibration;determining a property of said fluid in the flowtube based on the determined first and second frequencies, wherein determining said property comprises compensating for a mass flow rate-induced variation of at least one of the first frequency and second frequency.6. A method as set forth in wherein the first mode of vibration is a Coriolis mode and the second mode of vibration is a driven mode.7. A method as set forth in wherein the determining comprises compensating for mass flow rate-induced variation in the frequency of the Coriolis mode.8. A method as set forth in wherein the determining comprises compensating for mass flow rate-induced variation in the frequency of the driven ...

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Номер записи: 31
17-10-2013 дата публикации

System for and method of measuring flow of a powder

Номер: US20130275061A1
Автор: Tharwat Fouad-Fahmi
Принадлежит: Anubis Manufacturing Consultants Corp

A conveyor mechanism conveys a powder along a path. A first camera device arranged above the conveyor mechanism detects movement of a recognizable feature on an upper surface of the powder over a period of time. A velocity of the powder can be determined based on the movement of the recognizable feature over the period of time. A device can be used to generate the recognizable feature. A first light-emitting device can illuminate the upper surface to aid detection of the recognizable feature. A second light-emitting device can project a contour line on the upper surface, and a second camera device can be used to detect a position of the contour line. A cross sectional area of the powder can be correlated based on the position of the contour line.

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Номер записи: 32
31-10-2013 дата публикации

CORIOLIS MASS FLOW METER WITH HIGH ZERO STABILITY

Номер: US20130283932A1
Автор: AMANN Matthias, REINSHAUS Peter, RICKEN Martin
Принадлежит:

The invention relates to a Coriolis mass flow meter with improved zero point stability. The Coriolis mass flow meter has a pair of U-shaped measuring tubes. According to one embodiment of the invention, the Coriolis mass flow meter comprises a special housing for vibration compensation or vibration suppression in the region of the process connectors. Additionally or alternatively, a specific mass distribution of the vibration exciter and/or vibration sensor is provided, in order to neutralize unwanted vibrations by actively causing vibration. 2121615. The Coriolis mass flow meter () as defined in claim 1 , wherein said housing () is configured such that a resilient effect or vibration compensation is achievable by an upper plate () of said core region ().311625. The Coriolis mass flow meter () as defined in claim 2 , wherein the thickness of said upper plate () is such that the resonance frequency of said housing () is between 10 Hz and 100 Hz above the highest occurring resonance frequency of the U-shaped measuring tubes ().4125. The Coriolis mass flow meter () as defined in claim 3 , wherein the resonance frequency of the housing () is approximately 50 Hz above the highest occurring resonance frequency of the U-shaped measuring tubes ().61910. The Coriolis mass flow meter () as defined in claim 5 , wherein the different mass distributions are achieved at identical positions of at least one of said vibration exciter () and said vibration sensor () with respect to the respective plane (E claim 5 , E′). Applicant claims priority under 35 U.S.C. §119 of European Application No. 12002936.8 filed on Apr. 26, 2012, the disclosure of which is incorporated by reference.1. Field of the InventionThe invention relates to a Coriolis mass flow meter. More particularly, it relates to a Coriolis mass flow meter comprising a pair of counter-oscillating U-shaped measuring tubes.2. Prior Art, B, A, B, and C show a Coriolis mass flow meter according to the prior art. is a perspective ...

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Номер записи: 33
07-11-2013 дата публикации

Measuring transducer of vibration-type

Номер: US20130291652A1
Автор: BITTO Ennio, Eckert Gerhard, RIEDER Alfred, ZHU Hao
Принадлежит: Endress + Hauser Flowtec AG

A measuring transducer serves for producing vibration signals corresponding to parameters of a flowing medium comprises a measuring transducer housing having housing ends and, extending within the measuring transducer housing between its housing ends, a tube arrangement formed by means of at least two tubes. Of the two tubes, at least one tube serves as a measuring tube conveying flowing medium and the other tube is mechanically connected with the tube by means of a first coupling element to form an inlet-side coupling zone and by means of a second coupling element to form an outlet-side coupling zone. At least the first coupling element has in a region extending between the tubes a slit having at least one closed end. Slit has a maximal slit width and a maximal slit length, which is greater than the maximal slit width. Placed partially within the slit is a connecting element, which contacts a slit edge enclosing said slit. 131-. (canceled)32. A measuring transducer of vibration-type for producing vibration signals as a function of parameters of a flowing medium , especially parameters such as a mass flow rate , a density and/or a viscosity , which measuring transducer , comprising:a measuring transducer housing having a first housing end and a second housing end; anda tube arrangement extending within said measuring transducer housing its first housing end to its second housing end, and formed by means of at least two tubes, especially equally constructed tubes and/or tubes extending parallel to one another,of which at least a first tube, especially a first tube vibrating during operation, is embodied as a measuring tube serving for conveying flowing medium, andof which, especially a second tube vibrating during operation, is connected mechanically with said first tube to form an inlet-side, first coupling zone by means of a first coupling element, especially a plate-shaped, first coupling element, and to form an outlet-side, second coupling zone by means of a ...

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Номер записи: 34
14-11-2013 дата публикации

FLOW MEASUREMENT

Номер: US20130298663A1
Автор: Singfield Christian Robert Maurice
Принадлежит: Mezurx Pty Ltd

A liquid () flows through a wedge meter (). The density of the liquid () is measured with a Coriolis meter (). Density as measured by the Coriolis meter () is used in calculating the volume flow of fluid () through the wedge meter (). 1. A method of measuring the volume flow rate of a liquid , comprising:providing a flow of the liquid;tapping off a portion of the flow of liquid and using a Coriolis meter to measure the density of that portion of the flow of liquid;passing at least part of the flow of liquid through a Venturi meter; andusing the density of the liquid as measured by the Coriolis meter in calculating the volume flow rate of fluid through the Venturi meter.2. A method as claimed in claim 1 , in which the Venturi meter is a wedge meter.3. A method as claimed in claim 1 , in which the flow of liquid is supplied by a centrifugal pump.4. A method as claimed in in which at least part of the liquid flows through a positive displacement pump.6. A method as claimed in claim 5 , further comprising:counting the pump strokes of the positive displacement pump;using the count of pump strokes to calculate the volume flow rate through the positive displacement pump; and the volume flow rate through the positive displacement pump as calculated by counting the pump strokes;', 'with the volume flow rate through the positive displacement pump as calculated by using the volume flow rate through the Coriolis meter and the Venturi meter., 'comparing7. A method as claimed in claim 1 , in which the liquid is a slurry.8. A method as claimed in claim 7 , in which the slurry is a drilling mud.9. An apparatus for measuring the volume flow rate of a flow of liquid claim 7 , comprising:a Coriolis meter which is adapted to measure the density of a portion of the flow of liquid;a Venturi meter which is adapted to measure a pressure differential which is generated by the flow of at least a portion of the liquid through it; and the density measured by the Coriolis meter; and', 'the ...

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Номер записи: 35
21-11-2013 дата публикации

Vibrating flow meter and method for measuring temperature

Номер: US20130305837A1
Автор: Craig Brainerd Van Cleve
Принадлежит: Micro Motion Inc

A vibrating flow meter ( 205 ) is provided. The vibrating flow meter ( 205 ) includes a single curved flow conduit ( 210 ), a conduit temperature sensor T 1 ( 291 ) affixed to the single curved flow conduit ( 210 ), a balance structure ( 208 ) affixed to and opposing the single curved flow conduit ( 210 ), and a balance temperature sensor T 2 ( 292 ) affixed to the balance structure ( 208 ). A conduit temperature sensor resistance of the conduit temperature sensor T 1 ( 291 ) and a balance structure temperature sensor resistance of the balance temperature sensor T 2 (meter2) are selected to form a predetermined resistance ratio.

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Номер записи: 36
28-11-2013 дата публикации

METHOD FOR OPERATING A RESONANCE MEASURING SYSTEM

Номер: US20130317760A1
Автор: Kolahi Kourosh, Poremba Andreas, Storm Ralf
Принадлежит: KROHNE MESSTECHNIK GMBH & CO.

A method for operating a Coriolis mass flow measuring device having at least one measuring pipe through which a medium flows, at least one vibration generator, at least a first vibration sensor, at least a second vibration sensor and at least a control and analyzing unit. The detection of measurement variables or diagnosis parameters is achieved with increased accuracy and security in that the control and analyzing unit calculates, at least indirectly and in a ratiometric manner, at least a derived secondary variable based on a primary measurement, wherein interested primary measurement signals are transmitted alternately to the control and analyzing unit via different measurement channels and wherein, based on the various values obtained from the different measurement channels regarding the primary measurement signals, compensation values of the transmitted primary measurement signals are calculated and used as a basis for the calculation of the derived secondary variable. 113-. (canceled)14. Method for operating a Coriolis mass flow measuring device having at least one measuring tube through which a medium flows , at least one oscillation generator , at least one first oscillation sensor , at least one second oscillation sensor , and at least one control and analysis unit , whereby excitation signals can be transmitted via at least one excitation channel to the oscillation generator of the control and analysis unit , comprising the steps of:transmitting a first primary measuring signal of interest via at least one first measuring channel to the control and analysis unit from the first oscillation sensor,transmitting a second primary measuring signal of interest via at least one second measuring channel to the control and analysis unit from the second oscillation sensor,using the control and analysis unit to ratiometrically calculate at least one derived secondary variable at least indirectly from the primary measuring signals transmitted via the at least one first ...

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Номер записи: 37
05-12-2013 дата публикации

CORIOLIS MASS FLOW METER

Номер: US20130319134A1
Автор: CHATZIKONSTANTINOU Thomas
Принадлежит:

The invention relates to a Coriolis mass flow meter comprising two U-shaped measuring tubes having in each case two outer tube portions and an intermediate central tube portion. It comprises a vibration exciter for the purpose of effecting defined excitation of a movement of the measuring tubes, two vibration sensors for detecting movements of the measuring tubes and also a housing for accommodating at least parts of the measuring tubes. The inlets and outlets are rigidly connected to the housing. A first and a second cross brace, disposed in the region of the tube between its inlets and outlets for the purpose of coupling the two measuring tubes, form the vibration nodes of the measuring tubes. A tube portion of one measuring tube is integrally united with a tube portion of the other measuring tube. Furthermore, the two tube portions are integrally united with parts of the housing or integrally united with of one of the cross braces. 1. A Coriolis mass flow meter , comprising two U-shaped measuring tubes comprising in each case two outer tube portions and an intermediate central tube portion , wherein the measuring tubes are capable of allowing a fluid to flow therethrough , wherein said measuring tubes in each case comprise an inlet and an outlet;a vibration exciter for defined excitation of a movement of said measuring tubes;two vibration sensors for detecting movements of said measuring tubes;a housing for accommodating at least parts of said measuring tubes, wherein more particularly said inlets and said outlets are rigidly connected to said housing;a first and a second cross brace for coupling the two measuring tubes in the region of the tube between said inlets and outlets;wherein a tube portion of said measuring tube is integrally united with a tube portion of the other measuring tube,and that the two tube portions are further integrally united with parts of the housing or are integrally united with one of the cross braces.2. The Coriolis mass flow meter as ...

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Номер записи: 38
19-12-2013 дата публикации

Drive techniques for a digital flowmeter

Номер: US20130333484A1
Автор: Manus P. Henry, Mayela E. Zamora
Принадлежит: Invensys Systems Inc

Drive techniques for a digital flowmeter are described. The drive techniques account for delays caused during digital signal processing of sensor signals that correspond to a motion of a flowtube, as well as drive signals that impart motion to the flowtube. Such delays may be caused by a variety of factors, including delays associated with analog/digital conversion of the signals and/or filtering of the signals. The techniques include open-loop techniques and closed-loop techniques, which can be used separately or together during the start-up and operation of the digital flowmeter.

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Номер записи: 39
19-12-2013 дата публикации

METHOD FOR OPERATING A RESONANCE MEASURING SYSTEM AND A RESONANCE MEASURING SYSTEM IN THIS REGARD

Номер: US20130338943A1
Автор: Kolahi Kourosh, Storm Ralf
Принадлежит: KROHNE MESSTECHNIK GMBH

Methods and systems are provided for operating a resonance measuring system, including a Coriolis mass flow meter. The resonance measuring system includes an electrical actuating apparatus, an electromagnetic drive, and an oscillation element which interacts with a medium. The electrical actuating apparatus provides an electrical excitation signal that excites the electromagnetic drive. The electromagnetic drive excites the oscillation element to oscillation. A mathematical model of the resonance measuring system depicts the oscillation element and the parameters of the mathematical model are being identified excitation of the oscillation element. The identified parameters and quantities are used for operating the resonance measuring system. 1. A method for operating a resonance measuring system comprising an electrical actuating apparatus , an electromagnetic drive as an oscillation generator , an oscillation element which interacts with a medium , the method comprising:{'sub': '2', 'providing an electrical excitation signal ufor exciting the electromagnetic drive;'}exciting by the electromagnetic drive the oscillation element to oscillation in at least one natural form;depicting by a mathematical model of the resonance measuring system the oscillation element;identifying parameters of the mathematical model by excitation of the oscillation element and evaluation of the mathematical model;deriving the identified parameters and/or quantities for operation of the resonance measuring system,depicting, using the mathematical model, the electromagnetic drive and the oscillation element interacting with the medium;measuring a driving terminal current caused by the electrical excitation signal and a driving terminal voltage of the electromagnetic drive caused by the electrical excitation signal; andidentifying parameters of the electromagnetic drive and of the oscillation element by evaluation of the mathematical model based on the detected driving terminal current and ...

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Номер записи: 40
26-12-2013 дата публикации

METHOD OF AND APPARATUS FOR MEASURING THE MASS FLOW RATE OF A GAS

Номер: US20130340859A1
Автор: Downie Neil Alexander
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

There is provided a meter () for measuring the mass flow rate of a gas. The meter comprises a conduit () through which the gas flows in use. The conduit has a flow restriction orifice () through which choked flow occurs in use. The flow restriction orifice divides the conduit into an upstream portion () upstream of said orifice and a downstream portion () downstream of said orifice. The meter further comprises a sensor assembly (), the sensor assembly including a piezoelectric crystal oscillator () in said upstream portion such that said piezoelectric oscillator is in contact with said gas when the meter in use. The sensor assembly is arranged: to drive the piezoelectric crystal oscillator such that the piezoelectric crystal oscillator resonates at a resonant frequency; to measure said resonant frequency of said piezoelectric crystal oscillator; and to determine, from the resonant frequency, the mass flow rate through the orifice. 1. A method of measuring the mass flow rate of a gas through a conduit comprising an orifice through which choked flow is occurring , the orifice dividing the conduit into an upstream portion upstream of said orifice and a downstream portion downstream of said orifice , the upstream portion comprising a piezoelectric crystal oscillator comprising at least two planar tines and in contact with the gas upstream of the orifice , the method comprising:a) driving the piezoelectric crystal oscillator such that the piezoelectric crystal oscillator resonates at a resonant frequency;b) measuring the resonant frequency of the piezoelectric crystal oscillator; andc) determining the mass flow rate of gas through said orifice from the relationship between the measured resonant frequency of the piezoelectric crystal oscillator and the density of gas upstream of the orifice, and from the relationship between the mass flow rate, the density of the gas upstream of the orifice, the cross-sectional area of the orifice and the speed of sound in the gas.2. A ...

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Номер записи: 41
02-01-2014 дата публикации

Messaufnehmer vom Vibrationstyp sowie damit gebildetes Messsystem

Номер: US20140000374A1
Автор: BITTO Ennio, BRAUN Marcel, HUBER Christof, RIEDER Alfred, SCHÜTZE Christian
Принадлежит: Endress + Hauser Flowtec AG

A measuring transducer having exactly four flow openings, and an outlet-side housing end formed by means of an outlet-side flow divider having exactly four flow openings. A tube arrangement has exactly four curved or bent measuring tubes connected to the flow dividers for guiding flowing medium along flow paths connected in parallel. Each of the four measuring tubes opens with an inlet-side measuring tube end into one of the flow openings of the inlet-side flow divider, and with an outlet-side measuring tube end into one of the flow openings of the outlet-side flow divider. A first coupling element for adjusting eigenfrequencies of natural oscillation modes of the tube arrangement. An electro-mechanical exciter mechanism of the measuring transducer serves for producing and/or maintaining mechanical oscillations of the four measuring tubes. The first coupling element of first type includes, furthermore, a deformation body as well as four connecting struts, of which each is connected both with the deformation body as well as also with exactly one of the measuring tubes; conversely, also each of the measuring tubes is connected with exactly one of the four connecting struts. 148-. (canceled)49. A measuring transducer of the vibration type for registering at least one physical , measured variable of a flowable medium conveyed in a pipeline , especially a gas , a liquid , a powder or other flowable material , and/or for producing Coriolis forces serving for registering a mass flow rate of a flowable medium , especially a gas , a liquid , a powder or other flowable material , conveyed in a pipeline , wherein said measuring transducer comprises:a transducer housing, an inlet-side, first housing end of which is formed by means of an inlet-side, first flow divider having exactly four, mutually spaced flow openings, and an outlet-side, second housing end of which is formed by means of an outlet-side, second flow divider having exactly four, mutually spaced flow openings;a ...

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Номер записи: 42
16-01-2014 дата публикации

CORIOLIS FLOW SENSOR

Номер: US20140013860A1
Автор: GEEST Jan Wouter van de, Hagedoorn Wouter, HILDERINK André Johannes Maria, KATERBERG Marcel Ronald, NIEUWENHUIS Christian Johan
Принадлежит: Berkin B.V.

A Coriolis flow sensor including a loop-shaped Coriolis tube mounted in a housing with two ends lying next to one another, the ends being fixed in a fixation element, while the portion of the tube located between the ends lies free from the housing, which flow sensor includes an excitation element for causing the tube to oscillate about an excitation axis as well as a detection element for detecting displacements of portions of the tube during operation. The tube is connected through the fixation element to a balancing member, the assembly of the balancing member and the tube being resiliently arranged with respect to the housing, while the excitation element are arranged to rotate the tube and the balancing member with counter-phase about the excitation axis 1. A Coriolis flow sensor , comprising:a loop shaped Coriolis tube mounted in a housing with two ends lying next to one another, the ends being fixed in a tube fixation means, a portion of the tube located between the ends lying free from the housing;excitation means for causing the tube to oscillate about an excitation axis; anddetection means for detecting displacements of portions of the tube during operation,wherein the tube through the tube fixation means is connected to a balancing member, an assembly of the balancing member and the tube being resiliently arranged with respect to the housing, the excitation means being configured to rotate the tube about the excitation axis in counter-phase with the balancing member.2. The Coriolis flow sensor as claimed in claim 1 , wherein the assembly of the balancing member and the tube is suspended relative to the housing by resilient means such that the assembly can rotate about an axis of rotation that is at least substantially parallel to or coincides with the excitation axis of the tube.3. The Coriolis flow sensor as claimed in claim 1 , wherein the tube ends merge into a feed tube and a discharge tube beyond the tube fixation means claim 1 , the feed tube and ...

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Номер записи: 43
06-02-2014 дата публикации

Wet gas measurement

Номер: US20140039812A1
Автор: Manus P. Henry, Michael S. Tombs
Принадлежит: Invensys Systems Inc

A multi-phase process fluid is passed through a vibratable flowtube. Motion is induced in the vibratable flowtube. A first apparent property of the multi-phase process fluid based on the motion of the vibratable flowtube is determined, and an apparent intermediate value associated with the multi-phase process fluid based on the first apparent property is determined. A corrected intermediate value is determined based on a mapping between the intermediate value and the corrected intermediate value. A phase-specific property of a phase of the multi-phase process fluid is determined based on the corrected intermediate value.

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Номер записи: 44
06-02-2014 дата публикации

CORIOLIS MODE PROCESSING TECHNIQUES

Номер: US20140039813A1
Автор: Henry Manus P.
Принадлежит: INVENSYS SYSTEMS, INC.

Flowmeters are described in which a sensor signal received from a sensor that is attached to vibratable flowtube, so as to determine properties of a fluid within the flowtube, contains a drive signal component and a Coriolis mode component. The flowmeters are operable to determine drive parameters of the drive signal component, as well as Coriolis parameters of the Coriolis mode component. By analyzing the sensor signal based on the drive signal parameters, and not on the Coriolis signal parameters, the flowmeters are able to provide stable and accurate determinations of the properties of the fluid. 1. (canceled)2. A Coriolis flowmeter comprising:a flow tube for containing a fluid flow;a driver configured to induce motion of the flowtube;a pair of sensors positioned to detect motion of the flowtube;a processor configured to receive signals from the sensors and process the signals to measure a flow rate of fluid through the flow tube using a numerical integration of at least one of the sensor signals, the processor being configured to reduce the influence of a contaminant mode on the measured flow rate without filtering said at least one sensor signal before said numerical integration with a filter designed to suppress the contaminant mode.3. A Coriolis flowmeter as set forth in wherein said contaminant mode comprises a Coriolis mode.4. A Coriolis flowmeter as set forth in wherein said numerical integration is a step in a Fourier analysis of the at least one sensor signal.5. A Coriolis flowmeter as set forth in wherein the processor is configured to perform Fourier analysis on both sensor signals without filtering either of the sensor signals with a filter designed to suppress the contaminant mode before performing the Fourier analyses.6. A Coriolis flowmeter as set forth in wherein the processor is configured to estimate a major frequency of vibration of the flowtube using zero crossings of said at least one sensor signal.7. A Coriolis flowmeter as set forth in ...

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Номер записи: 45
06-02-2014 дата публикации

SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT FOR DETECTING A PROCESS DISTURBANCE IN A VIBRATING FLOW DEVICE

Номер: US20140039814A1
Автор: Stack Charles Paul, WEINSTEIN Joel
Принадлежит: MICRO MOTION, INC

The present invention relates to a system, a method, and a computer program product for detecting a process disturbance from entrained gas or particulates within a fluid flowing in a vibrating flow device (). In one embodiment, the system, the method and the computer program may involve a comparison between a measured drive gain and a drive gain threshold value and a comparison between a void fraction and a void fraction threshold value. In another embodiment, the system, the method and the computer program may involve a comparison between a measured drive gain and a drive gain threshold value, a comparison between a void fraction and a void fraction threshold value, and a comparison between a measured mass flow rate and a nominal mass flow rate threshold value. In yet another embodiment, the system, the method and the computer program may involve a comparison between a measured drive gain and a drive gain threshold value and a comparison between a measured pick-off amplitude and a pick-off amplitude threshold value. 17205. A method for detecting a process disturbance by one or more electronics () , generated from entrained gas or particulates within a fluid flowing in a vibrating flow device () , comprising the steps of:measuring a drive gain;measuring the pick-off amplitude; anddetecting the presence of the process disturbance based upon a comparison between the measured drive gain and a drive gain threshold value and a comparison between the measured pick-off amplitude and a pick-off amplitude threshold value.18. The method for detecting a process disturbance according to claim 17 , wherein the comparison between the measured drive gain and the drive gain threshold includes determining whether the measured drive gain is substantially equal to the drive gain threshold value.19. The method for detecting a process disturbance according to claim 17 , wherein the comparison between the measured pick-off amplitude and the pick-off amplitude threshold value includes ...

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Номер записи: 46
13-03-2014 дата публикации

FLOWMETER

Номер: US20140069210A1
Автор: HUSSAIN Yousif, ROLPH Christopher, WANG TAO
Принадлежит: KROHNE AG

A flowmeter has a guide structure that can have medium flowing through it and which preferably operates using the Coriolis principle. To provide a flowmeter that allows a high as possible measuring accuracy with a space requirement that is as small as possible, at least one sensor element is applied on an outer surface of the guide structure for determining and/or monitoring at least one process variable. 1. Flowmeter , comprising:a guide structure through which a medium is flowable, andat least one sensor element for at least one of determining and monitoring at least one process variable applied to an outer surface of the guide structure.2. Flowmeter according to claim 1 , wherein the at least one sensor element is at least partially arranged on a carrier element.3. Flowmeter according to claim 1 , wherein said at least one sensor element comprises at least two sensor elements.4. Flowmeter according to claim 3 , wherein the two sensor elements are electrically connected in series.5. Flowmeter according to claim 3 , wherein at least one of the at least two sensor elements is a strain-measuring element and another of the at least two sensor elements is a temperature-measuring element.6. Flowmeter according to claim 5 , wherein the strain-measuring element and the temperature-measuring element are electrically connected in series.7. Flowmeter according to claim 1 , wherein at least two sensor elements are provided claim 1 , wherein the guide structure has at least two measuring tubes claim 1 , wherein claim 1 , in each case claim 1 , at least one sensor element is arranged on an outer surface of a measuring tube claim 1 , and wherein relative circumferential positions of the sensor elements around the respective measuring tube are different.8. Flowmeter according to claim 7 , wherein the sensor elements are each arranged in a different range of angles in a level perpendicular to a longitudinal axis of the guide structure claim 7 ,9. Flowmeter according to claim 8 , ...

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Номер записи: 47
13-03-2014 дата публикации

Forage Harvester With An Arrangement For Measuring The Harvested Material Throughput

Номер: US20140073379A1
Автор: Stephan Merx, Werner Flohr
Принадлежит: Deere and Co

A forage harvester has an engine which is drivingly connected to a chopper cylinder via first drive belt, and to a first end of a drive shaft of a discharge accelerator. A second end of the drive shaft of the discharge accelerator is drivingly connected to a kernel processor via a second drive belt, is arranged, in the direction of harvested material flow, between the chopper cylinder and the discharge accelerator. The discharge accelerator comprises support disks which extend radially, and paddles. The support disks are attached to a hollow shaft enclosing the drive shaft, and, a sensor is arranged between the drive shaft and the discharge accelerator for the determination of the force transmitted by the drive shaft to the discharge accelerator.

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Номер записи: 48
20-03-2014 дата публикации

METHOD AND APPARATUS FOR DETERMINING AND CONTROLLING A STATIC FLUID PRESSURE THROUGH A VIBRATING METER

Номер: US20140076408A1
Автор: Weinsten Joel, Zimmer Patrick John
Принадлежит: Micro Motion, Inc.

A method for operating a fluid flow system () is provided. The fluid flow system () includes a fluid flowing through a pipeline (), a first pressure sensor () located within the pipeline (), and a vibrating meter (). The vibrating meter () includes a sensor assembly () in fluid communication with the first pressure sensor (). The method includes steps of measuring a pressure of the fluid within the pipeline () using the first pressure sensor () and measuring one or more flow characteristics of the fluid using the vibrating meter (). The method further includes a step of determining a static pressure of the fluid based on the pressure of the fluid within the pipeline () and the one or more flow characteristics. The method further includes a step of determining if the fluid contains at least some gas based on the static pressure of the fluid. 1300. A fluid flow system () , comprising:{'b': '301', 'a pipeline () with a flowing fluid;'}{'b': 303', '301', '301, 'a first pressure sensor () located within the pipeline () and determining a first pressure within the pipeline ();'}{'b': '5', 'claim-text': [{'b': 10', '301', '303, 'a sensor assembly () located within the pipeline () proximate to and in fluid communication with the first pressure sensor (); and'}, {'b': 20', '10', '210, 'a meter electronics () in electrical communication with the sensor assembly () and configured to receive one or more sensor signals () and measure one or more flow characteristics;'}], 'a vibrating meter () including{'b': 310', '303', '20, 'claim-text': [{'b': '303', 'receive the first pressure measurement from the first pressure sensor ();'}, {'b': '20', 'receive the one or more flow characteristics from the meter electronics ();'}, {'b': '301', 'determine a static pressure of the fluid based on the pressure of the fluid within the pipeline () and the one or more flow characteristics; and'}, 'determine if the fluid contains at least some gas based on the static pressure of the fluid., 'a ...

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Номер записи: 49
27-03-2014 дата публикации

CORIOLIS MASS FLOWMETER

Номер: US20140083204A1
Автор: HUSSAIN Yousif, ROLPH Christopher
Принадлежит: KROHNE AG

A Coriolis mass flowmeter () having at least one curved measuring tube (), at least one oscillation generator (), at least one oscillation sensor (), at least one measuring device electronics () and a housing (). To provide the housing () with increased pressure resistance, in particular against external positive pressure, the housing () has a first housing shell and a second housing shell, the first housing shell and the second housing shell completely surrounding the measuring tube () so as to form at least a first pressure-resistant hollow space around the measuring tube (), and the first housing shell and the second housing shell forming a bridge () between the inlet () and the outlet () of the measuring tube (). 1. Coriolis mass flowmeter , comprising:at least one curved measuring tube having an inlet and an outlet,at least one oscillation generator arranged for vibrating said at least one curved measuring tube,at least one oscillation sensor arranged for detecting vibration said of at least one curved measuring tube,at least one measuring device electronics for measuring vibration detected by said at least one oscillation sensor, anda housing enclosing at least said at least one curved measuring tube,wherein the housing comprises a first housing shell and a second housing shell,wherein the first housing shell and the second housing shell completely surround the at least one curved measuring tube in a manner forming at least a first pressure-resistant hollow space around at least the at least one curved measuring tube, andwherein the first housing shell and the second housing shell form a bridge between the inlet and the outlet of the at least one curved measuring tube.2. Coriolis mass flowmeter according to claim 1 , wherein the first housing shell and the second housing shell are joined together at a joining plane claim 1 , and wherein the joining plane runs parallel to a plane formed by a central measuring tube axis.3. Coriolis mass flowmeter according to ...

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Номер записи: 50
03-04-2014 дата публикации

CORRECTING FOR TWO-PHASE FLOW IN A DIGITAL FLOWMETER

Номер: US20140090484A1
Автор: De LaFuente Maria Jesus, Henry Manus P.
Принадлежит: INVENSYS SYSTEMS, INC.

A flowmeter is disclosed. The flowmeter includes a vibratable conduit, and a driver connected to the conduit that is operable to impart motion to the conduit. A sensor is connected to the conduit and is operable to sense the motion of the conduit and generate a sensor signal. A controller is connected to receive the sensor signal. The controller is operable to detect a single-phase flow condition and process the sensor signal using a first process during the single-phase flow condition to generate a validated mass-flow measurement. The controller is also operable to detect a two-phase flow condition and process the sensor signal using a second process during the two-phase flow condition to generate the validated mass-flow measurement. 1. (canceled)2. A flowmeter controller comprising one or more processing devices configured to:receive sensor signals from a sensor that is connected to a vibratable flowtube for detecting motion of the vibratable flowtube as fluid flows through the flowtube;determine an apparent flow condition of a two-phase fluid mixture flowing through the conduit using characteristics of the sensor signal;determine an actual flow condition of the two-phase mass flow based on said apparent flow condition and an application of an error correction factor to the apparent flow condition;determine drive signal characteristics for a drive signal to be applied to a driver connected to the vibratable flowtube for driving movement of the flowtube; andoutput the drive signal.3. The flowmeter controller of wherein the one or more processing devices are further configured to determine the error correction factor based on a pre-measured single-phase mass flow through the flowtube relative to measurement parameters associated with the mass flow through the flowtube as determined from the sensor signal characteristics.4. The flowmeter controller of claim 3 , wherein the measurement parameters include a temperature associated with the mass flow through the flowtube ...

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Номер записи: 51
07-01-2021 дата публикации

MONITORING DEVICE FOR MONITORING CROP YIELD

Номер: US20210000011A1
Автор: Advani Gurmukh H., Anderson Noel W., Cowles Kevin P., Rhodes Michael L.
Принадлежит:

A monitoring device for monitoring crop yield is disclosed. The monitoring device is mounted to a housing of a grain elevator of an agricultural work machine proximate a crop conveyor assembly arranged in the housing and has at least one aperture formed therein. A material engagement member is arranged on the mounting structure and is pivotal with respect to the mounting structure about a pivot point. The material engagement member can comprise first end and a second end opposite of the first end. At least one rotational sensor is arranged in the monitoring device and is configured to detect spatial movement or position of the material engagement member. A processing device is coupled to the at least one rotational sensor and is configured to determine an aggregate crop yield based on the detected rotational magnitude of the displacement of the first end or second end. 1. A monitoring device for monitoring crop yield , the monitoring device comprising:a mounting structure to be mounted to a housing of a grain elevator of an agricultural work machine proximate a crop conveyor assembly arranged in the housing;a material engagement member pivotal with respect to the mounting structure about a pivot point, the material engagement member having a first end and a second end opposite of the first end;an elastic member coupled to the material engagement member, the elastic member to apply a restorative force to the material engagement member when the material engagement member is displaced; anda rotational sensor to output a signal corresponding to a rotational magnitude of displacement of at least one of the first end or the second end relative to the pivot point, the signal for determination of a mass flow rate of an agricultural material, wherein the rotational magnitude of displacement is to be induced by an exertion of a force generated by the agricultural material engaged with a surface of at least of the first end or the second end of the material engagement member.2 ...

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Номер записи: 52
07-01-2016 дата публикации

TURNING VANE

Номер: US20160001239A1
Автор: ALTONJI Robert W., DILLE Joseph C., WANG Guoging
Принадлежит:

The disclosed embodiments include a mass flow controller for controlling a flow of a fluid. In one embodiment, the mass flow controller comprises an inlet for receiving the fluid; a flow path in which the fluid passes through the mass flow controller; a mass flow meter for providing a signal corresponding to mass flow of the fluid through the flow path, the mass flow meter having a bypass through which a majority of fluid flows; a turning vane positioned upstream of the bypass for generating a more uniform fluid flow; an adjustable valve for regulating the flow of the fluid out of an outlet of the mass flow controller; and a controller configured to apply a valve control signal to adjust the adjustable valve to a desired valve position to control the flow of the fluid out of an outlet of the mass flow controller. 1. A mass flow controller for controlling a flow of a fluid , the mass flow controller comprising:an inlet for receiving the fluid;a flow path in which the fluid passes through the mass flow controller;a mass flow sensor for providing a signal corresponding to mass flow of the fluid through the flow path;a bypass coupled to the mass flow sensor through which a majority of fluid flows;a turning vane positioned upstream of the bypass for generating a more uniform fluid flow;an adjustable valve for regulating the flow of the fluid out of an outlet of the mass flow controller; anda controller configured to apply a valve control signal to adjust the adjustable valve to a desired valve position to control the flow of the fluid out of an outlet of the mass flow controller.2. The mass flow controller of claim 1 , wherein the turning vane includes a flow mixer.3. The mass flow controller of claim 2 , wherein the flow mixer abuts an inlet screen of the bypass.4. The mass flow controller of claim 2 , wherein turning vane includes a flat portion abutting the flow mixer.5. The mass flow controller of claim 1 , wherein the turning vane comprises a plurality of vanes.6. ...

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Номер записи: 53
05-01-2017 дата публикации

Measuring Transducer of Vibration-Type

Номер: US20170003156A1
Автор: BRAUN Marcel, Lalla Robert, Matt Christian
Принадлежит:

The measuring transducer comprises four measuring tubes () as well as two oscillation exciters and (). The oscillation exciter () includes a coil () secured to the measuring tube () as well as a permanent magnet () secured to the measuring tube () and movable relative to the coil () and the oscillation exciter () includes a coil () secured to the measuring tube () as well as a permanent magnet () secured to the measuring tube () and movable relative to the coil (). In the case of the measuring transducer of the invention, the coils () are connected electrically in parallel with one another. 1. Measuring transducer , comprising:a first measuring tube;a second measuring tube, especially a second measuring tube arranged extending parallel to the first measuring tube and/or a second measuring tube constructed equally to the first measuring tube;a third measuring tube, especially a third measuring tube constructed equally to the first measuring tube;at least a fourth measuring tube, especially a fourth measuring tube arranged extending parallel to the third measuring tube and/or a fourth measuring tube constructed equally to the third measuring tube;a first oscillation exciter havinga first coil secured to the first measuring tube anda first permanent magnet, especially a cup shaped first permanent magnet, secured to the second measuring tube and movable relative to the first coil; as well asa second oscillation exciter, especially a second oscillation exciter constructed equally to the first oscillation exciter, wherein the second oscillation exciter hasa second coil secured to the third measuring tube, especially a second coil constructed equally to the first coil, anda second permanent magnet secured to the fourth measuring tube and movable relative to the second coil, especially a cup shaped second permanent magnet and/or a second permanent magnet constructed equally to the first permanent magnet;wherein the first coil is connected electrically in parallel with the ...

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Номер записи: 54
05-01-2017 дата публикации

FLOW RATE MEASURING DEVICE

Номер: US20170003691A1
Автор: Takakura Hiroshi
Принадлежит:

To achieve both response speed and accuracy required for a flow rate measuring device without sacrificing the simplicity and inexpensiveness of a PWM type D/A converter, the flow rate measuring device includes an analog conversion part adapted to convert a digital signal indicating a measured flow rate value to an analog signal. In addition, the analog conversion part includes: a PWM signal generating circuit that can output three or more specified voltages is configured to, on the basis of the measured flow rate value indicated by the digital signal, select two adjacent voltages, as well as on the basis of the measured flow rate value indicated by the digital signal, set a duty ratio to generate a PWM signal of which a high level and a low level are the two selected voltages, respectively; and a conversion circuit that smooths the PWM signal to convert to the analog signal. 1. A flow rate measuring device comprising an analog conversion part adapted to convert a digital flow rate signal indicating a measured flow rate value to an analog flow rate signal indicating the measured flow rate value , whereinthe analog conversion part comprises:a PWM signal generating circuit that can output three or more predetermined specified voltage levels, and on a basis of the measured flow rate value indicated by the digital flow rate signal, selects two specified voltage levels from among the specified voltage levels, as well as on the basis of the measured flow rate value indicated by the digital flow rate signal, setting a duty ratio to generate a PWM signal of which a high level and a low level are the two specified voltage levels, respectively; anda conversion circuit that smooths the PWM signal outputted from the PWM signal generating circuit to convert to the analog flow rate signal.2. The flow rate measuring device according to claim 1 , whereinthe PWM signal generating circuit is one that selects two adjacent specified voltage levels.3. The flow rate measuring device ...

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Номер записи: 55
04-01-2018 дата публикации

FLOW DETECTOR AND METHOD FOR MONITORING AN ADHESIVE FLOW

Номер: US20180003534A1
Автор: Pahl Andreas
Принадлежит:

A flow detector for monitoring an adhesive flow in an adhesive applicator includes a sensor device arranged in the adhesive flow. The sensor device is formed as a capacitive sensor. 111-. (canceled)12. A flow detector for monitoring an adhesive flow in an adhesive applicator , comprising a sensor device arranged in the adhesive flow , wherein the sensor device is formed as a capacitive sensor.13. The flow detector of claim 12 , wherein the capacitive sensor has a detector electrode claim 12 , which can be moved at least in certain portions by the adhesive flow to bring about a change in capacitance on account of a change in an average distance between a pair of electrodes of the capacitive sensor.14. The flow detector of claim 13 , wherein the detector electrode forms a rear electrode of the pair of electrodes with respect to a direction of flow of the adhesive flow.15. The flow detector of claim 13 , wherein the detector electrode has a movable tongue that can be made to extend by the adhesive flow claim 13 , the movable tongue extendable out of a main plane of extent of the detector electrode.16. The flow detector of claim 15 , wherein the flow detector has an adhesive outlet claim 15 , which is arranged outside a region in line with a head of the tongue claim 15 , in a region in line with a base of the tongue.17. The flow detector of claim 14 , wherein the detector electrode has a passage for the adhesive flow claim 14 , and wherein the other electrode of the pair of electrodes also includes a passage and/or a dielectric arranged between the pair of electrodes also having a passage.18. The flow detector of claim 15 , characterized in that the flow detector has a test channel claim 15 , which can be closed claim 15 , for a manual deflection of the tongue claim 15 , the test channel extending in through the other electrode of the pair of electrodes that is assigned to the detector electrode.19. The flow detector as claimed in claim 12 , wherein in that the sensor ...

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Номер записи: 56
04-01-2018 дата публикации

FLOWMETER MEASUREMENT CONFIDENCE DETERMINATION DEVICES AND METHODS

Номер: US20180003538A1
Автор: SCHOLLENBERGER Frederick Scott, WEINSTEIN Joel
Принадлежит: Micro Motion, Inc.

A method for operating a vibratory flowmeter () is provided. The method includes placing a process fluid in the vibratory meter () and measuring entrained gas in the process fluid. A measurement confidence level is determined for at least one operating variable. 1. A method for operating a vibratory flowmeter comprising:placing a process fluid in the vibratory meter;measuring entrained gas in the process fluid; anddetermining a measurement confidence level of at least one operating variable.2. The method of claim 1 , wherein measuring entrained gas in the process fluid comprises determining a drive gain threshold.3. The method of claim 2 , wherein determining a drive gain threshold comprises measuring drive gain signal over a predetermined time period.4. The method of claim 1 , wherein measuring entrained gas in the process fluid comprises detecting periods of time comprising minimum entrained gas in the process fluid claim 1 , and wherein the measurement confidence level is lowered if the drive gain threshold during these periods is above a predetermined threshold.5. The method of claim 4 , comprising the step of recording at least one hold value during the periods of time having low to no entrained gas in the process fluid.6. The method of claim 5 , wherein the at least one hold value comprises at least one of a flow rate and a density of the process fluid.7. The method of claim 1 , wherein measuring entrained gas in the process fluid comprises detecting a severity of gas slugs in the process fluid claim 1 , and wherein the measurement confidence level is lowered if the severity of gas slugs is above a predetermined threshold.8. The method of claim 1 , comprising the steps of:measuring a flow rate of the process fluid; andlowering the measurement confidence level if the measured flow rate is below a predetermined threshold.9. The method of claim 1 , comprising the steps of:measuring a time interval between process fluid entrained gas measurements; andlowering the ...

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Номер записи: 57
04-01-2018 дата публикации

DEVICE AND METHOD FOR DETERMINING AT LEAST ONE PARAMETER OF A FLOW OF A FLUID

Номер: US20180003733A1
Автор: Barth Stephan, HÖLLING Michael, PEINKE Joachim, PUCZYLOWSKI Jaroslaw
Принадлежит:

A device () for determining a parameter of a fluid flow includes an elastically deformable boom (), with an inflow area ( ) for fluid and a measurement apparatus () measuring deformation of the boom. A section of the inflow area is aligned askew and/or curved to a main fluid inflow direction (). The boom has an inflow structure () on one free end. The inflow structure has the fluid inflow area. To determine the parameter of the fluid flow at high resolution, in particular a high angle resolution, the boom has a reflection surface () on a side facing away from the inflow structure and the measurement apparatus () has a laser (). A beam axis () of the laser () is directed to the reflection surface () of the boom. 1. A device for determining at least one parameter of a flow of a fluid , the device comprising:an elastically deformable cantilever, which has at least one incoming flow surface for the fluid; anda measuring device for measuring the a deformation of the cantilever, wherein at least one section of the incoming flow surface is aligned obliquely and/or curved to a main incoming flow direction of the fluid, the cantilever has an incoming flow structure at one free end, and the incoming flow structure has the at least one incoming flow surface for the fluid, characterized the cantilever has a reflecting surface on a side facing away from the incoming flow structure, the measuring device has a laser, and a beam axis of the laser is directed at the reflecting surface of the cantilever.2. A device in accordance with claim 1 , wherein a plane and/or a tangent of a curvature of the incoming flow surface is aligned obliquely to the main incoming flow direction of the fluid.3. A device in accordance with claim 1 , wherein a plane and/or a tangent of a curvature of the incoming flow surface comprising a plane of the reflecting surface for the laser claim 1 , is aligned obliquely to the beam axis of the laser claim 1 , the reflecting surface being made of aluminum.4{'b': ...

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Номер записи: 58
02-01-2020 дата публикации

OIL CONTENT SENSOR

Номер: US20200003730A1
Автор: Davis Richard J., Melnik Martin V., WINECKI SLAWOMIR
Принадлежит:

The present disclosure relates to systems and methods for measuring oil/water content in oil-water mixtures, regardless of the salinity of the mixture and regardless of air in the sensor pipe. In some embodiments, the oil content is measured using a dielectric sensor. It is determined whether the oil content is above or below a threshold. If the oil content is above the threshold, the oil content is reported using the measurement from the dielectric sensor. If the oil content is below the threshold, the oil content is reported using the measurement from the eddy current sensor. In some embodiments, which improve performance when there is air in the sensor pipe, two dielectric sensors with different geometries are used instead of the one dielectric sensor. 1. A system for measuring oil content of a fluid , comprising:a pipe having a cavity configured to hold air, oil, and water; a first side electrode on a first side of the pipe; and', 'a second side electrode on a second side of the pipe, wherein the first side of the pipe is opposite the second side of the pipe; and, 'a first dielectric sensor, comprising a top electrode on a top of the pipe; and', 'a bottom electrode on a bottom of the pipe., 'a second dielectric sensor, comprising2. The system of claim 1 , wherein:an inner surface of the top of the pipe is in contact with the air;an inner surface of the bottom of the pipe is in contact with the water;an inner surface of the first side of the pipe is in contact with all of the air, the oil and the water; andan inner surface of the second side of the pipe is in contact with all of the air, the oil and the water.3. The system of claim 1 , further comprising an eddy current sensor claim 1 , comprising:a resonance circuit formed by a capacitor, and an inductor configured to produce a magnetic field within the cavity; anda SWR analyzer configured to measure a height of a peak of a resonance frequency of the resonance circuit.4. The system of claim 3 , further ...

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Номер записи: 59
07-01-2021 дата публикации

METHOD AND DEVICE FOR MEASURING FAT IN MILK

Номер: US20210003491A1
Автор: DRAHM Wolfgang, Pfluger Stefan, ZHU Hao
Принадлежит:

Method for continuous determining of fat content of milk having variable solids fractions 1. 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; andcalculating 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.2. Method as claimed in claim 1 , wherein claim 1 , for the calculating claim 1 , the milk is modeled as a three component system claim 1 , wherein the components comprise fat claim 1 , water and fat-free solids.3. Method as claimed in claim 2 , wherein the solids comprise proteins and carbohydrates claim 2 , especially mainly lactose.4. Method as claimed in one of the preceding claims claim 2 , wherein density of milk flowing in the pipeline without gas content is modeled as a function claim 2 , for example claim 2 , a linear function claim 2 , of concentration of the components contained in the milk with density values of pure components as weighting factors; ...

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Номер записи: 60
03-01-2019 дата публикации

Flow Totalizer

Номер: US20190003864A1
Автор: Hallett Tanner, Kristola Jay L.
Принадлежит: SENTRY EQUIPMENT CORP.

A flow totalizer apparatus for totalizing the volume of fluid flowing through the inventive apparatus. The apparatus includes a cylinder having a first cylinder port at one end and a second cylinder port at an opposite end, a piston slidably mounted within the cylinder, a bistable spring mechanism, a directional control valve and a counter. The bistable spring mechanism has a motion axis with two stable positions therealong and includes a drive pin, a piston slotted bar a spool slotted bar, both slotted bars slidably connected to the drive pin and aligned with the motion axis. The total volume is estimated by cylinder volume times the number of stable-position changes of the bistable spring mechanism. 2. The apparatus of wherein the counter is connected to the spool slotted bar.3. The apparatus of further including an indicator which indicates piston-travel fraction within the cylinder claim 1 , and an estimate of the total volume is equal to cylinder volume times the number of stable-position changes plus cylinder volume times the piston-travel fraction.4. The apparatus of wherein the indicator includes measurement markers on the piston slotted bar which indicate the position of the piston in the cylinder.5. The apparatus of wherein the counter is a mechanical counter.7. Apparatus for measuring the volume of fluid flowing therethrough claim 1 , the apparatus having a motion axis and comprising:a cylinder having a first cylinder port at one end and a second cylinder port at an opposite end;a piston slidably mounted within the cylinder, the motion of the piston being aligned with the motion axis; a drive pin;', 'a piston slotted bar slidably connected to the drive pin and aligned with the motion axis; and', 'a valve slotted bar slidably connected to the drive pin and aligned with the motion axis;, 'a spring mechanism having two stable positions along the motion axis and including an inlet port and an outlet port;', 'a first controlled port in fluid communication with ...

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Номер записи: 61
03-01-2019 дата публикации

METHOD FOR REYNOLDS NUMBER CORRECTION OF A FLOW MEASUREMENT OF A CORIOLIS FLOW MEASURING DEVICE

Номер: US20190003875A1
Автор: Anklin Martin Josef, Ceglia Paul, Leenhoven Ton, Natter Stephan
Принадлежит:

A method for ascertaining a Reynolds number compensated flow velocity and/or a Reynolds number compensated flow (G) by a Coriolis flow measuring device, comprising steps as follows: a. ascertaining at least one meter factor (C) during a calibration time interval in a calibration plant (a) based on measured values (A and B) of the Coriolis flow measuring device and a piston test apparatus of the calibration plant (a) by an evaluation unit of the calibration plant (a); b. transmitting the meter factor (C) from the evaluation unit of the calibration plant (a) to an evaluation unit of the Coriolis-flow measuring device; c. associating a Reynolds number (H) with this meter factor (D) while the Coriolis flow measuring device is connected to the calibration plant (a), and storing at least one data set of at least one number pair (D), in each case, of a Reynolds number and a meter factor, in the Coriolis flow measuring device; d. ascertaining an uncorrected measured value (E) for a flow velocity and/or a flow of a measured medium (M) at a measuring point (b), the density of the measured medium (M) at the measuring point (b) and the viscosity of the measured medium at the measuring point (b); e. ascertaining a Reynolds number based on the measured value (E) of the flow velocity and/or flow, the density and the viscosity of the measured medium (M) determined in step d) and associating a meter factor (C) with this Reynolds number; and f. correcting the uncorrected measured value (E) of flow velocity and/or flow based on the associated meter factor (C) and outputting the Reynolds number-corrected flow velocity and/or the Reynolds number-corrected flow (G), and a Coriolis flow measuring device. 19-. (canceled)10. A method for ascertaining a Reynolds number compensated flow velocity and/or a Reynolds number compensated flow (G) by a Coriolis flow measuring device , comprising the steps as follows:a. ascertaining at least one meter factor (C) during a calibration time interval in ...

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Номер записи: 62
13-01-2022 дата публикации

Airway Detection Using Air Pressure Differential

Номер: US20220011146A1
Автор: Tassitano James F.
Принадлежит:

A medical device position notification system that includes a differential air pressure sensor is provided. The differential air pressure sensor may be attached to a medical device, e.g. a catheter, that is configured to be inserted into a patient's body. The differential air pressure sensor is configured to alert in real time when at least a portion of the medical device is in the patient's trachea or airway versus the esophagus or gastrointestinal tract. A method for medical device position guidance using a medical device position notification system that includes a differential air pressure sensor is also provided. 1. A medical device position notification system comprising:a medical device, wherein at least a portion of the medical device is configured to be inserted into a patient's body; anda differential air pressure sensor, wherein the differential air pressure sensor is configured to provide information relating to the position of the medical device in the patient's body.2. The medical device position notification system of claim 1 , wherein the differential air pressure sensor is configured to measure air pressure within the medical device compared to ambient atmospheric air pressure.3. The medical device position notification system of claim 2 , wherein when the differential air pressure measured over time matches a pattern of inhalation and exhalation claim 2 , the medical device is in the trachea or respiratory tract of the patient's body.4. The medical device position notification system of claim 2 , wherein when the differential air pressure measured over time does not match a pattern of inhalation and exhalation claim 2 , the medical device is in the esophagus or gastrointestinal tract of the patient's body.5. The medical device position notification system of claim 1 , wherein the differential air pressure sensor comprises a first port for receiving air flow from the medical device and a second port for receiving air flow from ambient air.6. The ...

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Номер записи: 63
08-01-2015 дата публикации

SYSTEM AND METHOD FOR PROVIDING A SELF VALIDATING MASS FLOW CONTROLLER AND MASS FLOW METER

Номер: US20150007897A1
Автор: BANARES Berwin, Ellec Chris, Kehoe Anthony, Lull John, Valentine Bill
Принадлежит:

The disclosed embodiments include a method, apparatus, and computer program product for providing a self-validating mass flow controller or mass flow meter without requiring any software modification to a tool/tool controller in which the mass flow controller is being utilized. For example, the disclosed embodiments include a mass flow controller comprising an internal valve configured to receive a first pneumatic line coupled to a tool pilot valve and couple a second pneumatic line from the internal valve to an external isolation valve upstream of the inlet. The mass flow controller also includes at least one processing component configured to execute instructions to perform an in-situ rate of decay measurement after executing instructions to close the external isolation valve by using the internal valve to block airflow being received through the first pneumatic line. 1. An apparatus comprising:an inlet for receiving the fluid from a gas delivery line having an external isolation valve upstream of the inlet;a flow path in which the fluid passes through the apparatus;a mass flow sensor for providing a signal corresponding to mass flow of the fluid through the flow path;a pressure transducer coupled to the flow path configured to measure pressure at a point in the flow path; andan internal valve configured to receive a first pneumatic line coupled to a tool pilot valve and couple a second pneumatic line from the internal valve to an external isolation valve upstream of the inlet.2. The apparatus of claim 1 , further comprising at least one processing component configured to execute instructions to perform an in-situ rate of decay measurement after executing instructions to close the external isolation valve by using the internal valve to block airflow being received through the first pneumatic line.3. The apparatus of claim 2 , wherein the first pneumatic line and the second pneumatic line are routed through an opening on a top surface of the apparatus.4. The ...

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Номер записи: 64
20-01-2022 дата публикации

METHOD FOR MONITORING THE CONDITION OF A MEASUREMENT SENSOR

Номер: US20220018698A1
Автор: Anklin Martin Josef
Принадлежит:

The method of the present disclosure is used to monitor a condition of a measurement sensor comprising an oscillator, which has a measuring tube for conveying the medium, and a condition parameter dependent upon a further physical parameter. The method comprises: determining tuples containing a value of the physical parameter and an associated value of the condition parameter; assigning the tuples to a value range of the physical parameter; and forming a reference value of the condition parameter for this value range of the physical parameter using the value of the condition parameter when no valid reference value of the condition parameter for this value range is present; or comparing the value of the condition parameter of the tuple with the reference value when a reference value of the condition parameter for this value range is present; and generating a finding on the basis of the result of the comparison. 115-. (canceled)16. A method for monitoring a condition of a measurement sensor for detecting the density or mass flow rate of a medium , said measurement sensor being installed at a measuring point and comprising at least one oscillator excited to oscillate , which has at least one measuring tube for conveying the medium , wherein a condition parameter of the condition is dependent upon at least one further physical parameter of the medium conveyed in the measuring tube or of the oscillator; wherein the method comprises:determining tuples which contain a value of the at least one physical parameter and an associated value of the condition parameter;assigning the tuples in each case to a value range of the at least one physical parameter; andforming a reference value of the condition parameter for this value range of the at least one physical parameter using the value of the condition parameter of the tuple when no valid reference value of the condition parameter for this value range is present; orcomparing the value of the condition parameter of the tuple ...

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Номер записи: 65
27-01-2022 дата публикации

CONVERTING A DIRECTLY MEASURED MASS FLOW RATE TO ACCOUNT FOR BUOYANCY

Номер: US20220026254A1
Автор: BUTTLER Marc Allan
Принадлежит: Micro Motion, Inc.

A method of converting a directly measured mass flow rate to account for buoyancy is provided. The method includes directly measuring a mass flow rate of a material, measuring a density of the material, and using the measured density of the material to convert the directly measured mass flow rate into a mass value including a buoyancy of a fluid. 1. A method of converting a directly measured mass flow rate to account for buoyancy , the method comprising:directly measuring a mass flow rate of a material;measuring a density of the material; andusing the measured density of the material to convert the directly measured mass flow rate into a mass value including a buoyancy of a fluid.2. The method of claim 1 , further comprising using a density of the fluid to convert the directly measured mass flow rate into the mass value including the buoyancy of the fluid.3. The method of claim 1 , wherein the mass value including the buoyancy of the fluid comprises an indication by a weigh scale that has been calibrated using a mass standard in the fluid.4. The method of claim 1 , wherein the mass value including the buoyancy of the fluid comprises the mass value being uncorrected for the buoyancy of the fluid in which the mass value is gravimetrically determined.5. The method of claim 1 , wherein using the measured density of the material to convert the directly measured mass flow rate into the mass value including the buoyancy of the fluid comprises one of:totalizing a plurality of the directly measured mass flow rates of the material and using the measured density of the material to convert the totalized directly measured mass flow rates to the mass value including the buoyancy of the fluid; andusing the measured density of the material to convert one or more of the directly measured mass flow rates into one or more mass flow rate values including the buoyancy of the fluid.6. The method of claim 5 , wherein using the measured density of the material to convert the one or more ...

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Номер записи: 66
14-01-2016 дата публикации

Method for measuring the mass flow of a stream of a gaseous medium and fuel supply system for conducting the method

Номер: US20160011030A1
Автор: Hanspeter Zinn, Maria-Belen Gasser-Pagani, Wolfgang Lang
Принадлежит: General Electric Technology GmbH

A method is provided for measuring the mass flow of a stream of a gaseous medium of elevated first temperature flowing through a specific pipe. The method includes providing a reference stream of the gaseous medium with a known mass flow and a second temperature being substantially lower than the first temperature. The method further includes mixing the reference stream with said stream of a gaseous medium of elevated first temperature flowing through said specific pipe. The measure resulting temperature of the mixture of the reference stream and said stream of a gaseous medium of elevated first temperature flowing through the specific pipe is measured. The method further includes determining the unknown mass flow of the stream of a gaseous medium of elevated first temperature flowing through the specific pipe from the known mass flow of the reference stream; the elevated first temperature, the second temperature of the reference stream and the measured resulting temperature according to the formula: Mx = M ref  ( T   1 - T   3   x ) ( T   3   x - T   2 ) , where Mx is the unknown mass flow, M ref is the known mass flow of the reference stream, T 1 is the second temperature, T 2 is the elevated first temperature, and T 3 x is the resulting temperature after mixing.

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Номер записи: 67
11-01-2018 дата публикации

ULTRASONIC METER FOR RECORDING A THROUGH-FLOW RATE OF A FLUID

Номер: US20180010940A1
Автор: Sonnenberg Hans-Michael
Принадлежит:

An ultrasonic meter for recording a through-flow rate of a fluid has a fluid inlet, a fluid outlet, and a flow channel connecting the inlet to the outlet. The flow channel has a measurement region which extends in a straight line in a flow direction. Between the measurement region and the fluid outlet, there is arranged a reflection element which is flowed around by the fluid and by which an ultrasonic signal is reflected into the measurement region. Between the measurement region and the reflection element, there is arranged a changeover region of the flow channel. In the changeover region a spacing between a central straight line of the measurement region and the side wall enlarges. The changeover region has, in the circumferential direction of the flow channel, several circumferential sections in which the enlargement of the spacing between the central straight line and the side wall takes place. 1. An ultrasonic meter for recording a through-flow rate of a fluid , comprising:a fluid inlet;a fluid outlet;a flow channel connecting said fluid inlet to said fluid outlet, said flow channel having a measurement region extending in a straight line in a flow direction, said flow channel having a side wall delimiting a flow cross section of said flow channel;an ultrasonic transducer disposed on said side wall;a reflection element disposed between said measurement region and said fluid outlet, said reflection element being flowed around by the fluid, and by way of said reflection element an ultrasonic signal from said ultrasonic transducer can be reflected into said measurement region; andbetween said measurement region and said reflection element, said flow channel having a changeover region, in said changeover region a spacing between a central straight line, running in the flow direction, of said measurement region and said side wall enlarges in a stepwise or continuous manner, said changeover region having, in a circumferential direction of said flow channel, several ...

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Номер записи: 68
11-01-2018 дата публикации

SENSOR DETECTION OF THE PRESENCE OF AN AIR CORE IN A FLUID CONDUCTOR, AND THE FLOW RATE OF THE FLUID IN THE CONDUCTOR

Номер: US20180010945A1
Автор: CIRULIS Dylan, Maron Robert J., MEDINA Juan F., MERCURI Joseph
Принадлежит:

Apparatus features a signal processor or signal processing module configured to: receive signaling containing information about a central air-core of an overflow pipe of a hydrocyclone where fluid flow is concentrated in an outer annular region of the overflow pipe that is against an inner wall of the overflow pipe during a normal operation of the hydrocyclone; and determine corresponding signaling containing information about a collapse of the central air-core of the overflow pipe of the hydrocyclone during an abnormal operation of the hydrocyclone, based upon the signaling received. The signaling contains information about a fluid flow rate of the fluid flow by detecting a change in the magnitude of a force and/or a moment on the probe. 1. Apparatus comprising: receive signaling containing information about a central air-core of an overflow pipe of a hydrocyclone where fluid flow is concentrated in an outer annular region of the overflow pipe that is against an inner wall of the overflow pipe during a normal operation of the hydrocyclone; and', 'determine corresponding signaling containing information about a collapse of the central air-core of the overflow pipe of the hydrocyclone during an abnormal operation of the hydrocyclone, based upon the signaling received., 'a signal processor or processing module configured to2. Apparatus according to claim 1 , wherein the signal processor or processing module configured to provide the corresponding signaling claim 1 , including where the corresponding signaling contains information about the collapse of the central air-core of the overflow pipe of the hydrocyclone during the abnormal operation of the hydrocyclone.3. Apparatus according to claim 1 , wherein the signaling is received from a probe inserted radially in the overflow pipe of the hydrocyclone so as to contact the fluid flow and central air-core.4. Apparatus according to claim 3 , wherein the signaling contains information about measurements by strain gages ...

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Номер записи: 69
14-01-2021 дата публикации

APPARATUS AND METHOD FOR MEASURING FLUID FLOW PARAMETERS

Номер: US20210010841A1
Автор: Dang Changjiu, Gandarillas Carl J., Gysling Daniel L., Sasso Mark E.
Принадлежит:

An apparatus for measuring a parameter of a fluid flow passing within a pipe is provided. The apparatus includes a sensing device and a processing unit. The sensing device has a sensor array that includes at least one first macro fiber composite (MFC) strain sensor disposed at a first axial position, and at least one second MFC strain sensor disposed at a second axial position. The first axial position and the second axial position are spaced apart from one another. The at least one first MFC strain sensor and the at least one second MFC strain sensor are both configured to produce signals representative of pressure variations of the fluid flow passing within the pipe. The processing unit is configured to receive the signals from the sensor array and measure one or more fluid flow parameters based on the signals. 1. An apparatus for measuring a parameter of a fluid flow passing within a pipe , the pipe having an outer radial surface and a circumference , the apparatus comprising:a sensing device having a sensor array, the sensor array including at least one first macro fiber composite (MFC) strain sensor disposed at a first axial position, and at least one second MFC strain sensor disposed at a second axial position, which said first axial position and said second axial position are spaced apart from one another, and the at least one first MFC strain sensor and at least one second MFC strain sensor are both configured to produce signals representative of pressure variations of the fluid flow passing within the pipe;wherein each first MFC sensor and each second MFC sensor has a first sensitivity along a first axis and a second sensitivity along a second axis, which second axis is orthogonal to the first axis, and the second sensitivity is substantially less than the first sensitivity; andwherein the sensing device is configured for attachment to the pipe outer radial surface so that the at least one first MFC strain sensor and the at least one second MFC strain ...

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Номер записи: 70
14-01-2021 дата публикации

SYSTEMS AND METHODS FOR MULTIPHASE FLOW METERING ACCOUNTING FOR DISSOLVED GAS

Номер: US20210010843A1
Автор: Casimiro Richard P., Henry Manus, Probst Alice Anne, Tombs Michael S.
Принадлежит: Schneider Electric Systems USA, Inc.

A system for metering flow of a fluid has a vibratable flowtube for receiving a multiphase fluid flow. A driver is configured to vibrate the flowtube. A pair of sensors is configured to detect movement of the flowtube at different locations on the flowtube. Pressure and temperature sensors are configured to measure a pressure of the fluid. One or more processors are configured to use a phase difference between the sensor signals to determine a fluid flow rate through the flowtube. The one or more processors are further configured to determine an amount of dissolved gas in the multiphase fluid using the pressure, the temperature, and the relative amounts the multiple liquids in the multiphase fluid. 1. A net oil and gas skid for use characterizing the output from one or more petroleum wells , the net oil and gas skid comprising:a vibratable flowtube for receiving a multiphase fluid from said one or more petroleum wells;a driver configured to vibrate the flowtube;a pair of sensors configured to detect movement of the flowtube at different locations on the flowtube and output sensor signals indicative of the detected movement;a temperature sensor configured to measure a temperature of the multiphase fluid;a pressure sensor configured to measure a pressure of the multiphase fluid;a water cut meter adapted to measure relative amounts of oil and water in the multiphase fluid; andone or more processors configured to receive the sensor signals, determine a phase difference between the sensor signals, and use the determined phase difference to determine a fluid flow rate through the flowtube, wherein said one or more processors are further configured to:receive a signal from the water cut meter indicative of relative amounts of oil and water in the multiphase fluid;determine a density of the multiphase fluid in the flowtube using the sensor signals; anddetermine an amount of dissolved gas in the multiphase fluid using the temperature and pressure of the multiphase fluid.2. A ...

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Номер записи: 71
10-01-2019 дата публикации

METHOD FOR MAXIMIZING FLOWMETER TURNDOWN AND RELATED APPARATUS

Номер: US20190011301A1
Автор: Clinger Asher James
Принадлежит: Micro Motion, Inc.

A flowmeter () having a sensor assembly () connected to meter electronics () is provided. The sensor assembly () comprises at least one driver (), at least one pickoff (), and a conduit array (). The conduit array () comprises a plurality of small conduits () therein that are configured to receive a process fluid, and further configured to selectably adjust the beta ratio of the flowmeter (). 15102010104105. A flowmeter () having a sensor assembly () connected to meter electronics () , wherein the sensor assembly () comprises at least one driver () and at least one pickoff () , comprising:{'b': 300', '302', '5, 'a conduit array () comprising a plurality of small conduits () therein, configured to receive a process fluid therein, and configured to selectably adjust the beta ratio of the flowmeter ().'}25300302. The flowmeter () of claim 1 , wherein the conduit array () comprises between 3 and 30 small conduits ().35300302. The flowmeter () of claim 1 , wherein the conduit array () comprises between 30 and 300 small conduits ().45300302. The flowmeter () of claim 1 , wherein the conduit array () comprises between 30 and 3000 small conduits ().55300302. The flowmeter () of claim 1 , wherein the conduit array () is configured to adjust a total area of the small conduits () available for process fluid flow.65302. The flowmeter () of claim 1 , wherein each one of the plurality of small conduits () is selectable to provide flow therethrough.75302. The flowmeter () of claim 1 , comprising a valve configured to provide fluid communication to a subset of the plurality of small conduits () in order to receive the process fluid therein.8. A method of forming a flowmeter comprising the steps of:providing a sensor assembly comprising conduits and at least one driver and at least one pickoff attached to the conduits, wherein the conduits comprise:a conduit array comprising a plurality of small conduits therein, configured to receive a process fluid therein, and configured to ...

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Номер записи: 72
15-01-2015 дата публикации

Indirect mass flow sensor

Номер: US20150013474A1
Автор: Andrew Timothy Patten, Anna Pishchulina, Ruth Galic-Mackall
Принадлежит: Micro Motion Inc

A mass flow rate sensor system ( 200 ) is provided. The mass flow rate sensor system ( 200 ) includes a density meter ( 202 ) including a sensor assembly ( 204 a ) and a density meter electronics ( 204 b ) configured to generate a density measurement of a process fluid. The mass flow rate sensor system ( 200 ) further includes a volumetric flow meter ( 203 ) including a sensor assembly ( 205 a ) and a volumetric meter electronics ( 205 b ) configured to generate a volumetric flow rate of the process fluid and in electrical communication with the density meter electronics ( 204 b ). A remote processing system ( 207 ) is provided that is in electrical communication with only one of the density meter electronics ( 204 b ) or the volumetric meter electronics ( 205 b ). The remote processing system ( 207 ) is configured to receive a mass flow rate measurement of the process fluid generated by the density meter electronics ( 204 b ) or the volumetric meter electronics ( 205 b ) based on the generated density measurement and the generated volumetric flow rate.

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Номер записи: 73
09-01-2020 дата публикации

DRIVER, SENSOR, AND BRACE BAR FOR A VIBRATORY CONDUIT

Номер: US20200011718A1
Автор: SKINKLE David
Принадлежит: Micro Motion, Inc.

A brace bar (′) configured to be removably attachable to vibratory conduits () of a flowmeter () is provided. The attachment comprises a mechanical attachment, wherein the brace bar (′) is movable about the vibratory conduits (). A component (′) of the flowmeter () sensor assembly () that is removably attachable to vibratory conduits () is also provided. The attachment comprises a mechanical attachment, comprising: a coil portion () and a magnet portion (), wherein the component (′) is movable about the vibratory conduits (). 11401401401401301305140140140140130130aaabaaab. A brace bar ( , ′ , , ′) configured to removably attach to vibratory conduits ( , ) of a flowmeter () , wherein the attachment comprises a mechanical attachment , and wherein the brace bar ( , ′ , , ′) is repositionable about the vibratory conduits ( , ).2140140140140aa. The brace bar ( claim 1 , ′ claim 1 , claim 1 , ′) of claim 1 , comprising:{'b': '141', 'a brace bar body (); and'}{'b': 142', '142', '141, 'at least one end portion (, ′) fastenable to the brace bar body ().'}3140140140140aa. The brace bar ( claim 2 , ′ claim 2 , claim 2 , ′) of claim 2 , comprising:{'b': 146', '146', '141', '142', '142', '146', '146', '130', '130, 'i': a', 'b, 'at least one aperture (, ′) defined by the brace bar body () and the at least one end portion (, ′), wherein the at least one aperture (, ′) is configured to allow a vibratory conduit (, ) to pass therethrough; and'}{'b': 141', '142', '142', '130', '130, 'i': a', 'b, 'wherein the brace bar body () and the at least one end portion (, ′) are configured to clamp to the vibratory conduit (, ).'}4140140140140aa. The brace bar ( claim 2 , ′ claim 2 , claim 2 , ′) of claim 2 , comprising:{'b': 148', '147', '141', '142', '142', '148', '130', '130, 'i': a', 'b, 'at least one raised portion () disposed on an internal surface () of the brace bar body () and at least one end portion (, ′), wherein the at least one raised portion () is configured to contact a ...

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Номер записи: 74
03-02-2022 дата публикации

WET GAS FLOW RATE METERING METHOD BASED ON A CORIOLIS MASS FLOWMETER AND DEVICE THEREOF

Номер: US20220034697A1
Автор: Chen Jige, Xu Bin
Принадлежит: SEA PIONEERS TECHNOLOGIES CO., LTD.

This application discloses a wet gas flow rate metering method and device thereof. The Coriolis mass flowmeter measures a total mass flow rate Q, a mixed density ρ, and a medium temperature T; a combination of sensors measures a differential pressure ΔP between an inlet and an outlet; a flow rate calculation module performs multi-physical field coupling calculation to obtain an average gas density ρ; according to the mixed density ρ, the average gas density ρ, and a liquid density ρ, a mass liquid content nm of a mixed medium is calculated, and the total mass flow rate Qis corrected by the mass liquid content η, the medium temperature T and the average pressure P to obtain a corrected total mass flow rate Q′. According to the total mass flow rate Q′ and the mass liquid content η, a two-phase flow rate is calculated. 2. The wet gas flow rate metering method based on a Coriolis mass flowmeter according to claim 1 , wherein the combination of sensors comprises a pressure sensor and a differential pressure sensor that by measuring the pressure at the inlet of the Coriolis mass flowmeter and measuring the differential pressure ΔP at the inlet and the outlet in combination with the mixed density ρ claim 1 , obtain the average pressure in the measuring pipe of the Coriolis mass flowmeter through a computational fluid dynamics CFD model.3. The wet gas flow rate metering method based on a Coriolis mass flowmeter according to claim 1 , wherein the combination of sensors comprises two pressure sensors that by measuring the pressure at the inlet and the outlet of the Coriolis mass flowmeter to obtain an actual differential pressure ΔP in combination with the mixed density ρ claim 1 , obtain the average pressure in the measuring pipe of the Coriolis mass flowmeter through a computational fluid dynamics CFD model.4. The wet gas flow rate metering method based on a Coriolis mass flowmeter according to claim 1 , wherein the step of calculating claim 1 , by the flow rate calculation ...

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Номер записи: 75
03-02-2022 дата публикации

Void Fraction Calibration Method

Номер: US20220034777A1
Автор: Alan David Parker, Giles Edward
Принадлежит: M Flow Technologies Ltd

A method produces a void fraction (VF) error curve which correlates an apparent VF with the actual VF of a multi-phase flow, the method comprising (a) using a device to measure a property of the multi-phase flow from which an apparent VF may be calculated; (b) calculating the apparent VF using the measured property from the device; (c) determining the actual VF of the multiphase flow using a radiometric densitometer; (d) using the values from steps (b) and (c) to calculate the VF error; (e) repeating steps (b) through (d) for all expected flow conditions to generate a VF error curve.

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Номер записи: 76
19-01-2017 дата публикации

Systems for Calibrating Airflow Rates in Heating, Ventilating, and Air Conditioning (HVAC) Ducts and HVAC Systems Including the Same

Номер: US20170016642A1
Автор: Spalink Jan-Dieter
Принадлежит:

Airflow calibration systems are provided that are configured to be received in a duct of a heating, ventilating and air conditioning (HVAC) system. The air flow calibration systems include a housing including an air flow grid; and at least one pressure sensing cell positioned in the housing, the at least one cell being configured such that air flows through the at least one cell when the airflow calibration system is positioned in the duct of the HVAC system. The airflow calibration system is configured to be temporarily installed in the duct of the HVAC system to calibrate the HVAC system upon completion of the HVAC system or to recalibrate the HVAC system after a period of time. 1. An airflow calibration system configured to be received in a duct of a heating , ventilating and air conditioning (HVAC) system , the air flow calibration system comprising:a housing including an air flow grid; andat least one pressure sensing cell positioned in the housing, the at least one cell being configured such that air flows through the at least one cell when the airflow calibration system is positioned in the duct of the HVAC system,wherein the airflow calibration system is configured to be temporarily installed in the duct of the HVAC system to calibrate the HVAC system upon completion of the HVAC system or to recalibrate the HVAC system after a period of time.2. The system of :wherein the HVAC system includes an air handler, a return manifold and a media cabinet between the air handler and the return manifold;wherein the HVAC system further includes an entry transition manifold between the filter media cabinet and the air handler and an exit transition manifold between the air handler and a supply manifold; andwherein the at least one pressure sensing cell comprises a plurality of pressure sensing cells installed at least in both the entry and exit transition manifolds.3. The system of claim 2 , wherein the air flow grid is positioned in the filter media cabinet.4. The system ...

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Номер записи: 77
19-01-2017 дата публикации

METHOD FOR OPERATING A CORIOLIS MASS FLOWMETER AND RESPECTIVE CORIOLIS MASS FLOWMETER

Номер: US20170016751A1
Автор: ERKELENZ Alexander, STROM Ralf
Принадлежит:

Described and shown is a method for operating a Coriolis mass flowmeter () having at least one measuring tube (), an oscillation exciting device () for exciting the measuring tube () to an oscillation (), at least a first oscillation sensor () and a second oscillation sensor () and at least a first sensor signal path and a second sensor signal path. The object of the invention is to provide a method in which the measuring accuracy is increased compared to the prior art. The object is achieved in that at least one first test signal is generated having at least one first test signal frequency, that the at least first test signal is fed at least into the first sensor signal path and into the second sensor signal path, that the at least first test signal is guided by the first sensor signal path over the first oscillation sensor () and by the second sensor signal path over the second oscillation sensor (), that a test signal propagation time difference of at least the first test signal is determined at least between the first sensor signal path and the second sensor signal path, and that a sensor signal propagation time difference between a first sensor signal and a second sensor signal is compensated with the test signal propagation time difference. Additionally, the invention relates to a corresponding Coriolis mass flowmeter. 11232456. Method for operating a Coriolis mass flowmeter () having at least one measuring tube () , an oscillation exciting device () for exciting the measuring tube () to an oscillation () , at least a first oscillation sensor () and a second oscillation sensor () and at least a first sensor signal path and a second sensor signal path ,characterized inthat at least one first test signal is generated having at least one first test signal frequency,that the at least first test signal is fed at least into the first sensor signal path and into the second sensor signal path,{'b': 5', '6, 'that the at least first test signal is guided by the first ...

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Номер записи: 78
17-01-2019 дата публикации

METHOD AND APPARATUS FOR MODULATING A FLOWPATH

Номер: US20190017854A1
Автор: Brush Nicole M., Clinger Asher James, Ferris Robert, KEENEY-RITCHIE Miles, SCHLOSSER Martin Andrew
Принадлежит: Micro Motion, Inc.

A flowmeter () is provided having a sensor assembly () connected to meter electronics (), wherein the sensor assembly () comprises at least one driver () and at least one pickoff () and a variably modulated conduit () configured to change a flow area () therein. 15102010104105. A flowmeter () having a sensor assembly () connected to meter electronics () , wherein the sensor assembly () comprises at least one driver () and at least one pickoff () , comprising:{'b': 300', '304, 'a variably modulated conduit () configured to change a flow area () therein.'}25304. The flowmeter () of claim 1 , wherein the flow area () is adjustable to maintain a desired fluid velocity of fluid flowing therein.35. The flowmeter () of claim 2 , wherein the fluid velocity is maintained at a rate that maintains a desired delta t.45. The flowmeter () of claim 1 , comprising:{'b': '10', 'a first pressure sensor for measuring a first fluid pressure in the sensor assembly ();'}{'b': '10', 'a second pressure sensor for measuring a second fluid pressure in the sensor assembly (); and'}{'b': '304', 'wherein the flow area () is adjustable to maintain a desired differential pressure between the first and second pressure sensors.'}55300302304302. The flowmeter () of claim 1 , wherein the variably modulated conduit () comprises a fluid-actuated bladder () disposed in the flow area () claim 1 , wherein the fluid-actuated bladder () comprises an adjustable cross-sectional area.65308302103. The flowmeter () of claim 5 , comprising at least one support () configured to suspend the bladder () within the conduit ().75300402304402304. The flowmeter () of claim 1 , wherein the variably modulated conduit () comprises a plurality of fluid-actuated bladders () disposed in the flow area () claim 1 , wherein the plurality of fluid-actuated bladders () are configured to adjust in size to displace fluid flow within the flow area ().85402408103. The flowmeter () of claim 7 , wherein the plurality of fluid-actuated ...

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Номер записи: 79
21-01-2021 дата публикации

METHOD OF COMPENSATING FOR MASS FLOW USING KNOWN DENSITY

Номер: US20210018354A1
Автор: GARNETT Robert Barclay, PATTEN Andrew Timothy
Принадлежит: Micro Motion, Inc.

A method for determining a mass flow measurement is provided. The method comprises calibrating a flowmeter sensor at a first temperature and flowing a fluid having a second temperature through the flowmeter sensor. A density of the fluid is input into meter electronics. A compensated mass flow value of the fluid is determined by meter electronics, wherein the Modulus of Elasticity of the flowmeter sensor is unknown. 1. A method for determining a mass flow measurement , comprising:calibrating a flowmeter sensor at a first temperature;flowing a fluid having a second temperature that is different from the first temperature through the flowmeter sensor;inputting a density of the fluid into a flowmeter electronics;determining a compensated mass flow value of the fluid with the meter electronics, wherein the Modulus of Elasticity of the flowmeter sensor is unknown.2. The method of claim 1 , wherein the density is a known reference value.3. The method of claim 1 , wherein the density is calculated from an equation of state.4. The method of claim 3 , wherein the equation of state comprises a pressure term and a temperature term.6. The method of claim 1 , wherein the accuracy of the compensated mass flow value is ±0.5%.7. The method of claim 1 , wherein the first temperature is a non-cryogenic temperature claim 1 , and the second temperature is a cryogenic temperature.8520201055. A flowmeter () comprising meter electronics () configured to receive a process fluid having a second temperature claim 1 , the meter electronics () configured to communicate with a sensor assembly () of the flowmeter () claim 1 , wherein the flowmeter () comprises:{'b': 103', '103, 'at least one flow conduit (A, B) configured to receive the process fluid;'}{'b': 104', '103', '103, 'at least one driver () configured to vibrate the at least one flow conduit (A, B);'}{'b': 105', '105', '103', '103, 'and at least one pickoff (, ′) for detecting vibrations of the at least one flow conduit (A, B);'} ...

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Номер записи: 80
25-01-2018 дата публикации

Compositions and Methods for Delivery of Carbon Dioxide

Номер: US20180022654A1
Автор: BROWN Joshua Jeremy, FORGERON Dean Paul, MONKMAN George Sean, Sandberg Paul J.
Принадлежит:

Compositions and methods are provided for a system in which liquid carbon dioxide, or a mixture of liquid and gaseous carbon dioxide, is converted to solid carbon dioxide by exiting an orifice at a sufficient pressure drop, e.g., for delivery of carbon dioxide to a concrete mixture in a mixer. 128-. (canceled)29. An apparatus for delivering carbon dioxide to a concrete mixer at a concrete facility_comprising(i) a delivery line through which flows gaseous carbon dioxide, liquid carbon dioxide, or a combination of gaseous and liquid carbon dioxide, wherein the orifice comprises a proximal end and a distal end, and wherein the proximal end of the delivery line is connected to a source of liquid carbon dioxide;{'sub': p', 'o', 'o', 'p, '(ii) an orifice at the distal end of the delivery line, through which the carbon dioxide exits from the delivery line, wherein the diameter of the delivery line as it joins the orifice is Dand the diameter of the orifice is D, and wherein Dis less than D, and wherein the orifice is configured to convert liquid carbon dioxide to a mixture of solid and gaseous carbon dioxide;'}(iii) a conduit leading from the orifice to the concrete mixer, wherein at least a portion of the conduit is flexible, and wherein an opening of the conduit into the concrete mixer is positioned to apply the mixture of solid and gaseous carbon dioxide to a particular location in the mixer.30. The apparatus of wherein the opening of the conduit is at least 5 cm claim 29 , on average claim 29 , from concrete mixing in the mixer.31. The apparatus of further comprising a system to synchronize carbon dioxide delivery to the mixer using signals from a programmable logic computer (PLC) at the concrete facility.32. The apparatus of wherein the signals comprise a signal from a weight sensor for weight of cement used in the mixer.33. The apparatus of wherein the delivery line comprises a valve to adjust flow rate of the carbon dioxide in the delivery line34. The apparatus of ...

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Номер записи: 81
26-01-2017 дата публикации

DUAL E-SHAPED HIGH FREQUENCY EXCITER

Номер: US20170023390A1
Автор: Fan Xianyong, Huang Chuang, Song Guokun
Принадлежит:

An exciter associated with a mass flow primary comprises a rigid plate comprising a base, two outer struts, and an inner strut; at least one electromagnet formed over the inner strut; a protection circuit associated with the electromagnet; and an exciter circuit configured to induce a current in said electromagnet in order to cause vibration of said exciter. 1. An exciter comprising:a rigid plate comprising a base, two outer prongs, and an inner prong;at least one electromagnet formed over said inner prong;a protection circuit associated with said electromagnet wherein said protection circuit further comprises at least three resistors and a Zener diode arranged in parallel; andan exciter circuit configured to induce a current in said electromagnet in order to cause vibration of said exciter.2. The exciter of wherein said rigid plate comprises a silicon steel plate configured to reduce alternating flux claim 1 , reduce resistance claim 1 , and provide operation at high frequency.3. The exciter of wherein said at least one electromagnet comprises at least two wire windings configured to provide high quality magnetic force and strong magnetic field.4. The exciter of further comprising a bone structure configured to engage said electromagnet and said rigid plate.5. The exciter of further comprising a current inlet pin and a current outlet pin.6. (canceled)7. The exciter of further comprising a mass flow meter claim 1 , wherein said at least one exciter is configured to mount on a flow tube associated with said mass flow meter.8. A system for inducing vibration in a mass flow primary comprising: a rigid plate comprising a base, two outer prongs, and an inner prong;', 'at least one electromagnet formed over said inner prong;', 'a power source configured to provide power to said electromagnet; and', 'a protection circuit configured to induce a current in said electromagnet in order to cause vibration of said exciter, wherein said protection circuit further comprises at ...

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Номер записи: 82
26-01-2017 дата публикации

CONTOURED INSERT FOR FLOW VERIFICATION

Номер: US20170023391A1
Автор: Evans, JR. Stanley P., LITORIYA Mrinalini, NAIR Mahesh, ROSCA Florin, STRONGIN Mikhail
Принадлежит:

The present invention provides for a device or feature that incorporates a technique or means for flow measurement in a fluid flow system. By way of example, a contoured insert may be specifically calibrated to the pipe line size to ensure the desired accuracy of the flow measurement, irrespective of pipe length between the device and other fluid system components that would negatively influence other flow rate measurement devices. This in turn reduces the total number of components needed in a system. 1. A flow measurement combination comprising:a contoured insert configured at a location in a flow path of a fluid system, pre-calibrated to develop a flow coefficient that is used for verifying a volumetric flow rate in the flow path of the fluid system, and configured with a contour to create an artificial increase in an upstream pressure measurement resulting in a locally amplified pressure drop reading across the contoured insert that is directly proportional to a dynamic pressure component at the location; andan upstream and downstream pressure tap arrangement configured at the location upstream and downstream from the contoured insert to sense upstream and downstream pressure of the flow path in the fluid stream, and provide upstream and downstream pressure tap signaling containing information about the upstream and downstream pressure sensed for further processing to determine a flow measurement of the flow path in the fluid stream by applying a measured pressure differential between the upstream and downstream pressure tap signaling in relation to the flow coefficient developed by the contoured insert.2. A flow measurement combination according to claim 1 , whereinthe upstream and downstream pressure tap arrangement is configured with an upstream pressure sensor;the contour insert comprises a base portion configured with an upstream pressure tap formed therein; and a flat upwardly-angled surface configured to direct a fluid flow stream towards the upstream ...

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Номер записи: 83
26-01-2017 дата публикации

CORRECTION OF NATURAL GAS FLOW CALCULATIONS FOR THE EFFECTS OF WATER VAPOR

Номер: US20170023393A1
Автор: Davis Dale Scott, Wiklund David Eugene
Принадлежит:

A system for measuring concentration of water vapor in a gas includes a pressure sensor configured to sense a static pressure of the gas and a differential pressure sensor configured to sense a differential pressure. A temperature sensor senses a temperature of the gas. Circuitry estimates determines a concentration of water vapor in the gas based upon the measured pressures and temperature. 1. A system for measuring and correcting flow measurements of a gas containing saturated water vapor , comprising:a pressure sensor configured to sense a pressure of the gas;a differential pressure sensor configured to sense a differential pressure related to flow of the gas;a temperature sensor configured to sense a temperature of the gas; andmeasurement circuitry configured to determine flow of the gas compensated for saturated water vapor in the gas based upon the measured pressure, differential pressure and temperature.2. The system of wherein the pressure sensor claim 1 , differential pressure sensor and temperature sensor and measurement circuitry are implemented in a process variable transmitter.3. The system of wherein the pressure sensor claim 1 , differential pressure sensor and temperature sensor are implemented in a process variable transmitter and the measurement circuitry is implemented at a remote location.4. The system of wherein the measurement circuitry is in communication with the process variable transmitter through a process control loop.5. The system of including a memory which stores curve fitting coefficients and the measurement circuitry retrieves the curve fitting coefficients from the memory to determine the concentration of water vapor in the gas.6. The system of wherein the concentration of water vapor in the gas is determined using direct calculation.7. The system of wherein the pressure sensor claim 1 , temperature and measurement circuitry are implemented in a process variable transmitter claim 1 , the system further including a device for ...

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Номер записи: 84
28-01-2016 дата публикации

Non-invasive method for measurement of physical properties of free flowing materials in vessels

Номер: US20160025687A1
Автор: Alexander M. Raykhman, Eugene Naidis, Francis M. Lubrano, Valeriy Kashin
Принадлежит: Ultimo Measurement LLC

Methods and apparatus for measuring physical properties of material in a vessel are provided. In one example, the method includes capturing a response to a vibration initiated by a source in mechanical communication with the vessel, generating a vibration response spectrum based on the response, and calculating at least one value of at least one physical property of the material based on at least one pre-established relationship between the at least one physical property and one or more characteristics of the vibration response spectrum.

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Номер записи: 85
25-01-2018 дата публикации

COMPUTER-READABLE RECORDING MEDIUM, PARTICLE SIMULATION METHOD, AND INFORMATION PROCESSING APPARATUS

Номер: US20180023988A1
Автор: Ogasawara Keita, SUWA Tamon
Принадлежит: FUJITSU LIMITED

A particle simulation program is disclosed. A computer forms a particle generation surface in a vicinity of an inflow port. The computer forms a particle disappearance surface representing a boundary to eliminate particles depending on the particle generation surface. The computer performs a particle simulation, in which the particles of fluid filled in a vessel are flowed out from the inflow port. The computer periodically generates the particles from the particle generation surface. The computer eliminates a particle crossing out of the particle disappearance surface. 1. A non-transitory computer-readable recording medium storing therein a particle simulation program that causes a computer to execute a process comprising:forming a particle generation surface in a vicinity of an inflow port;forming a particle disappearance surface representing a boundary to eliminate particles depending on the particle generation surface;performing a particle simulation, in which the particles of fluid filled in a vessel are flowed out from the inflow port;periodically generating the particles from the particle generation surface; andeliminating a particle crossing out of the particle disappearance surface.2. The non-transitory computer-readable recording medium as claimed in claim 1 , wherein the particle that is eliminated crossing out of the particle disappearance surface indicates a velocity in a direction counter to an inflow direction.3. The non-transitory computer-readable recording medium as claimed in claim 1 , wherein the process further comprises:setting a margin to extend a size of a cross-section of the formed particle disappearance surface outwards with respect to the inflow port; andarranging the particle disappearance surface, which has the cross-section extending outwards with respect to the inflow port, at the inflow port.4. The non-transitory computer-readable recording medium as claimed in claim 1 , wherein the process further comprises:setting a partial area ...

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Номер записи: 86
23-01-2020 дата публикации

Measurement of Product Pellets Flow Rate

Номер: US20200024085A1
Автор: Hottovy John D., MODY Paresh C.
Принадлежит:

A process is described that includes flowing a carrier fluid through a transfer line, feeding polymer pellets into the transfer line at a feed location, measuring a first pressure value of the carrier fluid at a location in the transfer line upstream of the feed location, measuring a second pressure value of the carrier fluid and polymer pellets at a downstream location in the transfer line which is downstream of the feed location, and determining a mass flow rate of the polymer pellets flowing in the transfer line based on a differential pressure between the first pressure value and the second pressure value. 1. A process comprising:flowing a carrier fluid through a transfer line;feeding polymer pellets into the transfer line at a feed location;measuring a first pressure value of the carrier fluid at a location in the transfer line upstream of the feed location;measuring a second pressure value of the carrier fluid and polymer pellets at a downstream location in the transfer line which is downstream of the feed location;determining a mass flow rate of the polymer pellets flowing in the transfer line based on a differential pressure between the first pressure value and the second pressure value;determining an amount of one or more additives to feed to an extruder based on the mass flow rate of the polymer pellets in the transfer line, wherein the extruder is a source of the polymer pellets fed to the transfer line; andadjusting a flow of the one or more additives to the extruder based on the amount.2. The process of claim 1 , where the one or more additives comprise surface modifiers claim 1 , slip agents claim 1 , antiblocks claim 1 , tackifiers claim 1 , dispersing agents claim 1 , antioxidants claim 1 , nucleating agents claim 1 , pigments claim 1 , dyes and colorants claim 1 , processing aids claim 1 , waxes claim 1 , oils claim 1 , fluoroelastomers claim 1 , antistats claim 1 , scavengers claim 1 , odor enhancers claim 1 , degradation agents claim 1 , ...

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Номер записи: 87
24-01-2019 дата публикации

METER ELECTRONICS FOR TWO OR MORE METER ASSEMBLIES

Номер: US20190025106A1
Автор: Gao Fengchuan, LIU Huan, MAGINNIS Richard L., Shen Kai
Принадлежит: Micro Motion, Inc.

A meter electronics () for two or more meter assemblies (, ). The meter electronics () includes a processor () and one or more signal processors () communicatively coupled to the processor (). The one or more signal processors () are configured to communicatively couple to a first meter assembly () and a second meter assembly (). Accordingly, only one meter electronics can be employed to control the two or more meter assemblies, which may reduce the costs associated with employing two meter electronics. 11001010100ab. A meter electronics () for two or more meter assemblies ( , ) , the meter electronics () comprising:{'b': '110', 'a processor (); and'}{'b': 120', '110', '120', '10', '10, 'i': a', 'b, 'one or more signal processors () communicatively coupled to the processor (), wherein the one or more signal processors () are configured to communicatively couple to a first meter assembly () and a second meter assembly ().'}210012012101210aabb. The meter electronics () of claim 1 , wherein the one or more signal processors () are further configured to receive a first sensor signal () from the first meter assembly () and a second sensor signal () from the second meter assembly ().31001201212ab. The meter electronics () of claim 2 , wherein the one or more signal processors () are further configured to digitize the first sensor signal () and the second sensor signal ().410012014101410aabb. The meter electronics () of claim 1 , wherein the one or more signal processors () are further configured to provide a first drive signal () to a first meter assembly () and a second drive signal () to a second meter assembly ().5100140110140. The meter electronics () of claim 1 , further comprising a communication port () communicatively coupled to the processor () claim 1 , wherein the communication port () is configured to communicatively couple with a host.61001201211212112aabb. The meter electronics () of claim 1 , wherein the one or more signal processors () are configured to ...

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Номер записи: 88
28-01-2021 дата публикации

Adaptive filter bank for modeling a thermal system

Номер: US20210025766A1
Автор: Larry A. Turner
Принадлежит: Schneider Electric USA Inc

Embodiments of the disclosure implement an application of an adaptive filter bank that is used to characterize the heat transfer of a volume in a thermal system, to estimate temperature and power consumption, and to improve performance characteristics in applications including optimal temperature control and diagnostics. In some embodiments, the adaptive filter bank is an iterative solution, comprised of a collection of adaptive filters defined to consume incident signals, produce an aggregate reference signal, estimate an error relative to an observed primary signal, and modify thermal coefficients to converge on a solution. For example, the incident signals are comprised of properties related to active, passive, solar irradiance, and unobserved heat transfer. A reference signal is an estimate of a primary signal, related to the rate of heat transfer or temperature change. Thereupon, the thermal coefficients are modified in an adaptive process to include gradient descent, which minimizes estimation error.

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Номер записи: 89
24-04-2014 дата публикации

Digital flowmeter

Номер: US20140114589A1
Автор: David W. Clarke, James H. Vignos, Manus P. Henry
Принадлежит: Invensys Systems Inc

A control and measurement system for a coriolis flowmeter having a flowtube, a driver adapted to vibrate the flowtube, and a pair of sensors adapted to generate signals indicative of movement of the flowtube when it is being vibrated by the driver, wherein the sensors are positioned relative to one another so the signals from the sensors are indicative of a mass flow rate of fluid through the flowtube. A digital drive signal generator is adapted to generate a variable digital drive signal for controlling operation of the driver. The digital drive signal generator can be adapted to cause the driver to resist motion of the flowtube during a first time period and amplify motion of the flowtube during a second time period. The digital drive signal generator can also be adapted to initiate motion of the flowtube by sending one or more square wave signals to the driver.

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Номер записи: 90
04-02-2016 дата публикации

Messwandler vom Vibrationstyp sowie damit gebildetes Messsystem

Номер: US20160033314A1
Автор: Alfred Rieder, Christian Schutze, Christof Huber, Ennio Bitto, Martin Josef Anklin
Принадлежит: Endress and Hauser Flowtec AG

A measuring transducer comprises a measuring tube having an inlet-side tube end and an outlet-side tube end, a tube wall having a predetermined wall thickness and a lumen surrounded by the tube wall and extending between the first and second tube end, a support element, which with a support end is mechanically connected with the tube end and with a support end is mechanically connected with the tube end, as well as, laterally spaced from the measuring tube, a support element, which with a support end is mechanically coupled with the support end and with a support end is mechanically coupled with the support end. The measuring tube is adapted to guide a flowing medium in its lumen and caused to oscillate about a static resting position for producing Coriolis forces. An oscillation exciter as well as at least one oscillation sensor. The measuring transducer has a wanted mode having a resonant frequency, in which the measuring tube can execute wanted oscillations around its static resting position suitable for producing Coriolis forces and having a wanted frequency corresponding to the resonant frequency of the wanted mode. The oscillation exciter is placed externally on the measuring tube and one exciter component is placed on the support element, is, furthermore, adapted to excite the wanted oscillations of the measuring tube, and the oscillation sensor, of which one sensor component is placed externally on the measuring tube and one sensor component is placed on the support element, is adapted to register movements of the measuring tube relative to the support element and to convert such into an oscillatory signal representing oscillations of the measuring tube.

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Номер записи: 91
01-05-2014 дата публикации

DIGITAL FLOWMETER

Номер: US20140116155A1
Автор: Clarke David W., Henry Manus P., Vignos James H.
Принадлежит: INVENSYS SYSTEMS, INC.

A control and measurement system for a coriolis flowmeter having a flowtube, a driver adapted to vibrate the flowtube, and a pair of sensors adapted to generate signals indicative of movement of the flowtube when it is being vibrated by the driver, wherein the sensors are positioned relative to one another so the signals from the sensors are indicative of a mass flow rate of fluid through the flowtube. A digital drive signal generator is adapted to generate a variable digital drive signal for controlling operation of the driver. The digital drive signal generator can be adapted to cause the driver to resist motion of the flowtube during a first time period and amplify motion of the flowtube during a second time period. The digital drive signal generator can also be adapted to initiate motion of the flowtube by sending one or more square wave signals to the driver. 1. (canceled)2. A control and measurement system for a Coriolis flowmeter of the type comprising a flow tube , a driver configured to oscillate the flow tube , and a pair of sensors configured to generate signals indicative of movement of the flowtube when it is being oscillated by the driver , the sensors being positioned relative to one another so the signals from the sensors are indicative of a mass flow rate of fluid through the flowtube , the control and measurement system comprising:a digital signal processor configured to determine the mass flow rate of the fluid using the sensor signals and output a signal indicative of the determined mass flow rate; anda digital drive signal generator configured to generate a variable drive signal for controlling operation of the driver;wherein the control and measurement system is configured to apply a force to reduce the motion of the flowtube; andwherein the control and measurement system is configured to combine the sensor signals to produce a combined sensor signal and generate a gain signal based on the combined sensor signal.3. A control and measurement ...

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Номер записи: 92
01-05-2014 дата публикации

DIGITAL FLOWMETER

Номер: US20140116156A1
Автор: Clarke David W., Henry Manus P., Vignos James H.
Принадлежит: INVENSYS SYSTEMS, INC.

A control and measurement system for a coriolis flowmeter having a flowtube, a driver adapted to vibrate the flowtube, and a pair of sensors adapted to generate signals indicative of movement of the flowtube when it is being vibrated by the driver, wherein the sensors are positioned relative to one another so the signals from the sensors are indicative of a mass flow rate of fluid through the flowtube. A digital drive signal generator is adapted to generate a variable digital drive signal for controlling operation of the driver. The digital drive signal generator can be adapted to cause the driver to resist motion of the flowtube during a first time period and amplify motion of the flowtube during a second time period. The digital drive signal generator can also be adapted to initiate motion of the flowtube by sending one or more square wave signals to the driver. 1. (canceled)2. A Coriolis flowmeter comprising:a pair of conduits configured to convey a fluid through the flowmeter, each conduit defining a fluid passage having at least one curve;a driver configured to oscillate the conduits in substantially opposite phase to one another;a first sensor configured to generate a first signal indicative of relative movement of the pair of conduits when they are oscillated by the driver, the first sensor being positioned at a first location;a second sensor configured to generate a second signal indicative of relative movement of the pair of conduits when they are oscillated by the driver, the second sensor being positioned at a second location, the first and second sensors being positioned so a phase difference between the first and second signals is related to a mass flow rate of the fluid through the flowmeter;a digital signal processor configured to detect the phase difference and determine the mass flow rate of the fluid using the detected phase difference and output a signal indicative of the determined mass flow rate; and combine the first and second signals to ...

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Номер записи: 93
01-02-2018 дата публикации

TEMPERATURE COMPENSATION OF A SIGNAL IN A VIBRATORY METER

Номер: US20180031404A1
Автор: Li Xin, LIU Huan, MAGINNIS Richard L., Shen Kai, WANG Lingjun
Принадлежит: Micro Motion, Inc.

A method for temperature compensation of a signal in a vibratory meter is provided. The method includes obtaining one or more signals from a meter assembly in the vibratory meter, providing the one or more signals to a meter electronics of the vibratory meter, and compensating the one or more signals with a signal parameter offset, wherein the signal parameter offset is based on a temperature of the meter electronics. 1. A method for temperature compensation of a signal in a vibratory meter , the method comprising:obtaining one or more signals from a meter assembly in the vibratory meter;providing the one or more signals to a meter electronics of the vibratory meter; andcompensating the one or more signals with a signal parameter offset, wherein the signal parameter offset is based on a temperature of the meter electronics.2. The method of claim 1 , wherein the step of obtaining the one or more signals from the meter assembly comprises obtaining one or more signals from at least one sensor attached to a tube in the meter assembly.3. The method of claim 1 , wherein the one or more signals includes a signal that is previously zeroed at a nominal temperature.4. The method of claim 1 , further comprising at least one of:determining a time delay between two of the one or more signals and compensating the time delay with the signal parameter offset;determining a frequency of the one or more signals and compensating the frequency with the signal parameter offset; anddetermining an amplitude of the one or more signals and compensating the amplitude with the signal parameter offset.5. The method of claim 1 , further comprising measuring the temperature of the meter electronics and comparing the measured temperature with a stored measured temperature.6. The method of claim 1 , further comprising measuring the temperature of the meter electronics and correlating the measured temperature with the signal parameter offset.7. The method of claim 1 , wherein the one or more signals ...

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Номер записи: 94
05-02-2015 дата публикации

Coriolis Mass Flow Meter, Vibrating Tube Density Meter and Vibrating Sheet Used Therein

Номер: US20150033874A1
Автор: Cui Xinwang, Wang Fahui, Wu Junbao, Zhang Tingxu
Принадлежит: QINGDAO ADD VALUE FLOW METERING CO., LTD

The present invention relates to a Coriolis mass flow meter, a vibrating tube density meter and a vibrating sheet used therein, and more particularly, to a vibrating sheet for use in a Coriolis mass flow meter or a vibrating tube density meter, the vibrating sheet having at least one welded connecting portion that is fixedly welded to the flow tube of the Coriolis mass flow meter or the vibrating tube density meter, the flow tube being excited to vibrate around a revolving axis at the welded junction of the vibrating sheet and the flow tube. The welded connecting portions of the vibrating sheet are only formed in the stress insensitive region of the vibrating sheet, wherein the stress insensitive region is the region of the vibrating sheet which has an angle of not more than 45 degrees with respect to the revolving axis. In addition, the present invention also provides a Coriolis mass flow meter and a vibrating tube density meter using the vibrating sheet. The present invention not only simplifies the process, but also improves the measurement precision and service life of the Coriolis mass flow meter and the vibrating tube density meter. 1. A vibrating sheet for use in a Coriolis mass flow meter or a vibrating tube density meter , the vibrating sheet having at least one welded connecting portion that is fixedly welded to the flow tube of the Coriolis mass flow meter or the vibrating tube density meter , the flow tube being excited to vibrate around a revolving axis at the welded junction of the vibrating sheet and the flow tube , characterized in that:the welded connecting portion is only formed in a stress insensitive region of the vibrating sheet, wherein the stress insensitive region of the vibrating sheet is the region of the vibrating sheet which has an angle of not more than 45 degrees with respect to the revolving axis2. The vibrating sheet according to claim 1 , characterized in that:the vibrating sheet has a U-shaped or L-shaped structure, at least one ...

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Номер записи: 95
04-02-2021 дата публикации

DENSITY FLOW METER FOR PHARMACEUTICAL FORMULATION DOSING

Номер: US20210030623A1
Автор: ARNEIL Katherine, WADDINGTON David, WORT Matthew
Принадлежит: Catalent U.K. Swindon Zydis Limited

Provided are systems and method for dosing a pharmaceutical formulation. These methods and systems can displace the pharmaceutical formulation through a density flow meter, wherein the density flow meter is configured to measure a density of the pharmaceutical formulation. Next, the pharmaceutical formulation can be dosed into preformed molds and the dosing process can be stopped when the density of the pharmaceutical formulation measured by the density flow meter is below a predetermined threshold. 1. A system for dosing a pharmaceutical formulation comprising:a vessel for storing a pharmaceutical formulation;a recirculation system comprising a density flow meter fluidly connected to the vessel and a recirculation pump fluidly connected to the density flow meter and the vessel, wherein the recirculation pump is configured to displace the pharmaceutical formulation from the vessel through the density flow meter and the density flow meter is configured to measure a density of the pharmaceutical formulation;at least one pump fluidly connected to the recirculation system, wherein the at least one pump is configured to displace the pharmaceutical formulation from the recirculation system and into preformed molds,wherein the at least one pump is configured to stop displacing the pharmaceutical formulation from the recirculation system when the density of the pharmaceutical formulation measured by the density flow meter is below a predetermined threshold.2. The system of claim 1 , further comprising a computer claim 1 , wherein the computer claim 1 , the density flow meter claim 1 , and the at least one pump are communicatively coupled with one another.3. The system of claim 2 , wherein the density flow meter is configured to send data comprising the density of the pharmaceutical formulation to the computer.4. The system of claim 3 , wherein the computer is configured to send one or more instruction or control signals to the at least one pump to alter an activation state ...

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Номер записи: 96
17-02-2022 дата публикации

FLOW DAMPENER IN FLOW MEASUREMENT SYSTEM

Номер: US20220049810A1
Автор: Centofante Charles A.
Принадлежит:

A flow dampener for dampening pulsation in a fluid flow includes a body shell, a flexible membrane, and two flow ports. The body shell has an interior surface and an elongate groove formed on the interior surface. The flexible membrane is sealed to the interior surface of the body shell and covers the elongate groove. In some embodiments, the flexible membrane is over-molded onto the body shell. The flexible membrane cooperates with the elongate groove to form an elongate flow path for the fluid flow. The flexible membrane has a thickness in a range from 0.5 mm to 6 mm. As the membrane is flexible, it vibrates as the fluid flows through the elongate flow path, absorbs kinetic energy in the fluid flow, and thereby dampens pulsation in the fluid flow. 1. A flow dampener comprising:{'claim-text': ['a body shell having an interior surface and an elongate groove formed on the interior surface; and', 'a flexible membrane sealed to the interior surface of the body shell and covering the elongate groove, the flexible membrane cooperating with the elongate groove to form an elongate flow path, the elongate flow path having two ends, wherein flexibility of the membrane dampens vibration in a flow of fluid through the elongate flow path;'], '#text': 'two sections, each section comprising:'}two external flow ports, one external flow port to one end of the elongate flow path in each section; anda through flow port providing a flow path between the other ends of the elongate flow paths.2. The flow dampener of claim 1 , wherein the body shells of the two sections are fastened to each other.3. The flow dampener of claim 1 , wherein each of the two external flow ports comprises a hole through the body shell of one section claim 1 , and the through flow port comprises a hole through the flexible membrane of each section.4. The flow dampener of claim 1 , wherein the body shells of at least one section is made from a material selected from a group consisting of: a thermoplastic ...

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Номер записи: 97
31-01-2019 дата публикации

DETERMINING A CORRECTED MEASURED FLOW RATE

Номер: US20190033111A1
Автор: MAGINNIS Richard L., Standiford Dean M.
Принадлежит: Micro Motion, Inc.

A method of determining a corrected measured flow rate is provided. The method includes measuring a flow rate with a first flow meter, measuring a flow rate with a second flow meter, the second flow meter being fluidly coupled to the first flow meter in series, and correcting the measured flow rate of the first flow meter with the measured flow rate of the second flow meter. 1. A method of determining a corrected measured flow rate , the method comprising:measuring a flow rate with a first flow meter;measuring a flow rate with a second flow meter, the second flow meter being fluidly coupled to the first flow meter in series; andcorrecting the measured flow rate of the first flow meter with the measured flow rate of the second flow meter.2. The method of claim 1 , wherein correcting the measured flow rate of the first flow meter comprises summing the measured flow rate of the second flow meter with the measured flow rate of the first flow meter.3. The method of claim 1 , wherein correcting the measured flow rate of the first flow meter comprises correcting the measured flow rate of the first flow meter with an estimated zero flow instability of the first flow meter claim 1 , the estimated zero flow instability being comprised of a difference between the measured flow rate of the first flow meter and the measured flow rate of the second flow meter.4. The method of claim 1 , wherein the flow rate of the first flow meter and the flow rate of the second flow meter are measured substantially simultaneously.5. The method of claim 1 , wherein the flow rate of the second flow meter is measured prior to the measured flow rate of the first flow meter.655. A dual flow meter system () for determining a corrected measured flow rate claim 1 , the dual flow meter system () comprising:{'b': '5', 'i': 'a', 'a first flow meter ();'}{'b': 5', '5, 'i': b', 'a, 'a second flow meter () fluidly coupled in series with the first flow meter (); and'}{'b': 100', '5', '5', '100', '5', '5, 'i': ...

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Номер записи: 98
31-01-2019 дата публикации

LIMITING A DRIVE SIGNAL

Номер: US20190033112A1
Автор: Gao Fengchuan, Shen Kai, Zhang Mei
Принадлежит: Micro Motion, Inc.

A method of limiting a drive signal is provided. The method includes providing a drive signal for a meter assembly, wherein the meter assembly has a resonance frequency. The method also includes interrupting the drive signal after a first drive time-period, wherein the first drive time-period is based on an expected time for the drive signal to reach the resonance frequency. 1. A method of limiting a drive signal , the method comprising:providing a drive signal for a meter assembly, wherein the meter assembly has a resonance frequency; andinterrupting the drive signal after a first drive time-period, wherein the first drive time-period is based on an expected time for the drive signal to reach the resonance frequency.2. The method of claim 1 , wherein the first drive time-period is a pre-determined time-period based on the expected time for the drive signal to reach the resonance frequency.3. The method of claim 1 , wherein interrupting the drive signal comprises interrupting the drive signal with a quiescent portion.4. The method of claim 1 , further comprising providing the drive signal for the meter assembly after the first drive time-period.5. The method of claim 1 , wherein providing the drive signal comprises sweeping a frequency of the drive signal over a range that includes the resonance frequency.6100100. A meter electronics () for limiting a drive signal claim 1 , the meter electronics () comprising:{'b': '110', 'a processor (); and'}{'b': 120', '110', '120, 'claim-text': [{'b': 10', '10', '10', '10, 'i': a', 'b', 'a', 'b, 'provide a drive signal for a meter assembly (, ), wherein the meter assembly (, ) has a resonance frequency; and'}, {'sub': a', 'a, 'interrupt the drive signal after a first drive time-period (T), wherein the first drive time-period (T) is based on an expected time for the drive signal to reach the resonance frequency.'}], 'one or more signal processors () communicatively coupled to the processor (), wherein the one or more signal ...

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Номер записи: 99
31-01-2019 дата публикации

Limiting a current drawn by two or more meter assemblies

Номер: US20190033113A1
Автор: Fengchuan Gao, Huan LIU, Kai Shen
Принадлежит: Micro Moition Inc

A method of limiting a current drawn by two or more meter assemblies (10a,10b) is provided. The method includes driving a first meter assembly (10a) with a first drive signal, comparing one or more operating parameters of the first meter assembly (10a) to an operating threshold, and driving a second meter assembly (10b) with a second drive signal based on the comparison to prevent a current drawn by the first meter assembly 10a) and the second meter assembly (10b) from exceeding a current threshold.

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Номер записи: 100