Endress + Hauser Flowtec Ag

Endress+hauser Gmbh+co. Kg

Vivek Kumar

Alfred Rieder

Christof Huber

Mattia Alioli

Martin Josef Anklin

Axel Pfau

Anastasios Badarlis

Wolfgang Drahm

Hao Zhu

Achim Wiest

Michal Bezdek

Christian Schutze

Marc Werner

Ennio Bitto

Gerhard Eckert

Michael Kirst

Benjamin Schwenter

Pierre Ueberschlag

Christian Schütze

Martin Anklin-Imhof

Hanno Schultheis

Oliver Berberig

Oliver Popp

Marc Hollmach

Simon Triebenbacher

Panagiotis Papathanasiou

Josef Hubensteiner

Natalie Schlachter

Philipp Montsko

Tobias Schwer

Markus Schütz

A method includes: determining a wall temperature of a wall enclosing a lumen of a flow line; determining a density, a viscosity, a thermal conductivity, a thermal capacity, and a pressure differential of a medium to be measured flowing in the line; determining a characteristic number value for the medium, which characterizes a heating of the medium flowing in the line as a result of dissipation and is a function of an Eckert number, a Prandtl number, and a pressure loss coefficient of the line as well as line-specific first, second and third exponents; and determining a temperature of the medium using the characteristic number value and the wall temperature. A measuring system for the method includes: a temperature sensor thermally coupled to a lateral surface of the wall and configured to generate a temperature measurement signal; and an operating electronic system electrically connected to the temperature sensor.

Method for ascertaining the temperature of a substance to be measured, and measuring system for this purpose

The present disclosure relates to a Coriolis measuring transmitter of a Coriolis measuring device for measuring a mass flow or a density of a medium flowing through a pipe, which includes: at least one pair of measuring tubes arranged to oscillate relative to each other, wherein each measuring tube includes a centrally arranged bend, at least one driver and at least two vibration sensors; two guiding devices, each including a fluid chamber with a first opening for connection with the pipe and second openings for each measuring tube for connection with the measuring tubes, wherein the guiding devices are each formed from multiple parts, for example, formed from two parts, wherein a first part forms a pipe connecting part, and wherein at least one second part forms a measuring tube connecting part.

Coriolis measuring transmitter and Coriolis measuring device

A flow divider comprises a lumen having perpendicular, symmetry planes intersecting in an axis of inertia connecting the ends. Cross sectional area have radii extending from a geometric center of gravity to the wall and lying at an angle φ (−180°≤φ≤180°) to a reference axis and being perpendicular to its axis of inertia, wherein each radius lying at an angle φ=0° to the relevant reference axis points away from the symmetry plane, and fulfills a formula f(φ, P) associated with its cross sectional area and defined by a coefficients set P(P=[abmmnnn]) corresponding to the flow divider opening: in such a manner that the radii R(φ) of a cross sectional area of the lumen fulfills a formula f(φ, P) defined by a coefficients set P=[abmmnnn], with a=(0.95 . . . 1), b=(0.45 . . . 0.7), m=4, m=4, n=3.0, n=nand n=(3 . . . 4).

Flow divider and fluid line system formed by same

A vibronic measurement sensor includes two measuring tubes for conveying the medium and two temperature sensors, each arranged on a surface portion of the measuring tubes, respectively, wherein: centroids of the two surface portions relative to an intersection line between a longitudinal plane of symmetry and the transverse plane of symmetry of the sensor are rotationally symmetrical to one another; the first centroid lies in a first section plane running perpendicular to a measuring tube center line of the first measuring tube, wherein an intersection point of the measuring tube center line with the first intersection plane is defined; and the first centroid is arranged relative to the intersection point of the measuring tube center line such that a measurement accuracy of the sensor is largely independent of the installation position, even when inhomogeneous temperature distributions are formed over measuring tube cross-sections at low Reynolds numbers.

Vibronic measurement sensor having at least two temperature sensors

A method for determining a viscosity of a medium based on damping of an oscillation mode of a measurement tube comprises exciting oscillations of an oscillation mode; detecting a sequence of provisional damping measurement values for the measurement tube oscillation mode; and calculating target measurement values. The influence of the cross-sensitivity of the damping for the flow rate of the medium is corrected by determining rectified damping measurement values that correspond to damping when the medium is at rest and determining viscosity on the basis of the rectified damping measurement values, or correcting the influence of the cross-sensitivity of the damping for the flow rate of the medium by determining provisional intermediate values of a damping-dependent variable, determining rectified intermediate values that correspond to the intermediate values when the medium is at rest, and determining the target measurement values on the basis of the rectified intermediate values.

Method and measuring device for determining the viscosity of a medium

The present disclosure describes an ultrasonic flowmeter including: a measuring tube with a measuring tube wall and at least one pair of housings extending to an outer side of the measuring tube wall; a pair of ultrasonic transducers, each with a transducing element for generating and/or sensing ultrasonic pulses and a transducer body, wherein each of the housings is arranged to house one of the transducers, and wherein the housings have an inner first diameter; wherein transducer body includes a circumferential surface, and wherein the transducer body includes an end face, wherein the end face has a second diameter, and wherein the transducer includes at least one first protrusion protruding from the circumferential surface into a gap between the transducer body and the housing.

Ultrasonic flowmeter

A flow measuring device operating on the vortex counter principle, comprises: a measuring tube; a blockage in the form of a bluff body in the measuring tube for bringing about a Karman vortex street with flow dependent vortex frequency; a first pressure fluctuation measuring arrangement for registering vortex related pressure fluctuations and for providing signals dependent on pressure fluctuations; a second pressure fluctuation measuring arrangement for registering vortex related pressure fluctuations and for providing signals dependent on pressure fluctuations. The first pressure fluctuation measuring arrangement is spaced in the longitudinal direction of the measuring tube from the second pressure fluctuation measuring arrangement. An evaluating unit for determining a vortex frequency and a flow measured value dependent thereon, and the evaluation unit is further adapted, based on the ratio of the amplitudes of the signals of the first pressure fluctuation measuring arrangement and the second pressure fluctuation measuring arrangement, or variables derived therefrom, to determine the current Reynolds number and/or the kinematic viscosity of the medium flowing in the measuring tube.

Flow measuring device operating on the vortex counter principle

The present disclosure relates to a Coriolis mass flow meter including: a measuring tube; an one exciter for generating vibrations in the measuring tube; two sensors for detecting the vibrations in the measuring tube and for outputting associated sensor signals; and an operating and evaluating unit for determining a mass flow value of a medium in the measuring tube based on a phase difference or time difference between the sensor signals, wherein for Reynolds numbers below a Reynolds number threshold a cross-sensitivity to a viscosity of the medium correlates with a Stokes number, wherein the operating and evaluating unit is configured to determine a current value of the Stokes number for Reynolds numbers below the lower Reynolds number threshold and to compensate for the influence of the cross-sensitivity in the determining of the mass flow.

Mass flow meter according to the coriolis principle and method for determining a mass flow

A measuring device which has at least a first component, in which an integral measurement duct is provided or the first component forms in connection with additional components a measurement duct integrally in the measuring device. The measurement duct is provided for conducting a measured medium through the measuring device, characterized in that the first component has a first sensor for determining a first thermophysical property selected from thermal conductivity, thermal diffusivity and/or specific heat capacity of the measured medium, and wherein the measuring device has a second sensor, which vibrates and is provided for determining viscosity and/or density of the measured medium. The measured medium is conducted through the measurement duct from the first sensor to the second sensor.

Measuring device and method for determining a corrected mass flow and uses of the measuring device

The density measuring device serves for measuring density, &#x3c1;, of a flowable medium and comprises a measuring device electronics (ME) as well as a measuring transducer (MT) electrically connected therewith. The measuring transducer includes a measuring tube (), an oscillation exciter () for exciting and maintaining oscillations and an oscillation sensor () for registering oscillations of the at least one measuring tube. The measuring device electronics is adapted by means of an oscillation measurement signal (s) as well as an exciter signal (e) to adjust a drive force effecting wanted oscillations (namely oscillations with a predetermined wanted frequency, f) of the measuring tube. The drive force is adjusted in such a manner that during a predetermined phase control interval a phase shift angle, &#x3c6;, by which a velocity response, V, of the measuring tube Is phase shifted relative to a wanted force component, F, of the drive force, is less than &#x2212;20&#xb0; and greater than &#x2212;80&#xb0;, and/or the wanted frequency has a frequency value, which corresponds to greater than 1.00001 times, equally as well less than 1.001 times, a frequency value of an instantaneous resonant frequency of the measuring tube. Moreover, the measuring device electronics is adapted based on the oscillation measurement signal (s) present during the phase control interval to ascertain at least one frequency measured value, X, which represents the wanted frequency for the phase control interval, as well as also with application of the frequency measured value, X, to generate a density measured value, X, representing a density, &#x3c1;.

Density measuring device

A flow conditioner comprising a perforated plate with a central hole and four or more circular paths, which are arranged radially from the central hole and concentrically with one another, wherein holes are arranged on these concentric circular paths, characterized in that a preponderate number of holes of an intermediate circular path have a greater hole diameter than a preponderate number of holes of the innermost and a preponderate number of holes of the outermost circular paths.

Flow conditioner

A Coriolis mass flow measuring device comprises a measuring device electronics as well as, connected thereto, a measuring transducer comprising at least one measuring tube, an oscillation exciter for oscillating the at least one measuring tube and, mutually spaced along the measuring tube, two oscillation sensors for generating oscillation signals representing oscillations of the measuring tube. The measuring tube is adapted to be flowed through by a medium and during that to be caused to vibrate in such a manner that the measuring tube executes wanted oscillations having a wanted frequency. The wanted oscillations are suitable to induce in the flowing medium, dependent on its mass flow rate, Coriolis forces suitable for bringing about a measurement effect of a first type, namely Coriolis oscillations of the wanted frequency superimposed on the wanted oscillations. These Coriolis oscillations are, in turn, suitable to induce in the medium centrifugal forces dependent on its mass flow rate and on its density. These centrifugal forces bring about a measurement effect of a second type, namely, superimposed on the Coriolis oscillations, centrifugal oscillations of the wanted frequency. The measuring device electronics is, among other things, adapted, based on the oscillation signals, to generate at least one mass flow, measured value, representing the mass flow rate, in such a manner that a dependence of a phase difference existing between wanted signal components of the oscillation signals is taken into consideration by the measurement effect of second type.

Coriolis mass flow measuring device

A method for detecting accretion or abrasion on a first measuring tube of a flow measuring device. A first temperature as a function of time is registered via a first temperature sensor, which is arranged on the first measuring tube in such a manner that, between the first temperature sensor and the medium, at least one measuring tube wall of the first measuring tube is embodied. Parallel in time, a second reference temperature as a function of time is registered by a second temperature sensor, which is spaced from the first temperature sensor and thermally coupled to the medium. Therefrom, at least one variable characteristic is determined, and accretion or abrasion on the first measuring tube is detected, if the at least one determined characteristic variable or a variable derived therefrom deviates by more than a limit value from a predetermined reference variable.

Method for detecting accretion or abrasion in a flow measuring device

A for operating a thermal, flow measuring device having a first sensor having a first heatable, resistance thermometer and at least one additional, second sensor having a second heatable, resistance thermometer, wherein a decision coefficient is calculated according to the formula DC=(PC&#x2212;PC)/PC, wherein PC(t=t)=P(t)/(T(t=t)&#x2212;T(t=t)) and PC(t=t)=P(t)/(T(t=t)&#x2212;T(t=t)), with P being the heating powers absorbed by the corresponding resistance thermometers at the points in time t and the temperature values T, wherein the value of the decision coefficient shows flow direction of a measured medium in the measuring tube.

Method for registering flow and a thermal, flow measuring device

The measuring system has a measuring transducer which produces primary signals transmitter electronics for activating the measuring transducer and for evaluating primary signals. The measuring transducer includes at least one measuring tube; at least one electro-mechanical, oscillation exciter, a first oscillation sensor. The transmitter electronics, in turn, delivers at least one driver signal for the oscillation exciter for effecting vibrations of the at least one measuring tube and generates, by means of the first primary signal and by means of the second primary signal, as well as with application of a Reynolds number, measured value representing a Reynolds number, Re, for medium flowing in the measuring transducer, a pressure difference, measured value, which represents a pressure difference occurring between two predetermined reference points in the flowing medium.

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Muttenz, Switzerland

Vivek Kumar