Endress + Hauser Flowtec Ag

Günther Bähr

Frank Voigt

Thomas Küng

Werner Wohlgemuth

Fred Kappertz

Thomas Zingg

Diego Uerlings

Alexandre Crnkovic

Thomas KÜNG

The present disclosure relates to a method for operating a magnetic-inductive flow meter for measuring the flow rate or the volumetric flow of a medium in a measuring tube and to such a flow meter, wherein the medium is acted upon by magnetic fields of different polarity and field strength, wherein the alternation between magnetic fields causes a voltage pulse in the medium, wherein a voltage pulse during a phase without a magnetic field is used for calculation of a correction of an electrode voltage characteristic.

Method of operating a magnetic-inductive flow meter for determining and correcting a fault of electrode voltage during feed phase

A magnetic-inductive flow meter and a method for operating such a magnetic-inductive flow meter for measuring the flow velocity or the volumetric flow rate of a medium in a measuring tube include subjecting the medium to magnetic fields of different polarity and field strength such that the changing between magnetic fields causes a voltage pulse in the medium and analyzing the voltage pulse to calculate a correction of an electrode voltage profile of a measuring electrode pair of the flow meter.

Magneto-inductive flow meter and operating method of analyzing a voltage pulse to correct an electrode voltage profile

The present disclosure relates to a method for measuring flow velocity or volume flow of a medium using a magneto inductive flow measuring device and to an arrangement having a magneto inductive flow measuring device, as well as to a filling plant with an arrangement, wherein the medium has a low conductivity. A high accuracy of measurement is achieved by provision of a first narrowing of a medium-containing pipeline and/or a second narrowing of a medium-containing measuring tube, wherein the pipeline leads the medium to a measuring tube of the flow measuring device.

Magnetic-inductive flowmeter and method for measuring the flow velocity of low conductivity media with a narrowing measuring tube and a field guide-back device

A magneto-inductive flow measuring device for ascertaining flow of a measured medium through a measuring tube having a measuring tube axis, comprising: at least a first coil component having a coil body for accommodating a coil core of a coil. The coil is wound on the coil body and the coil core is arranged in a first passageway of the coil body with a longitudinal axis of the coil core coaxial with the coil. At least two cable strands are arranged between the coil core and the coil body, wherein the cable strands serve for tapping the signal of two or more measuring electrodes arranged on the measuring tube. The cable strands extend within the coil component essentially along a cutting plane, which extends perpendicular to the measuring tube axis.

Magneto-inductive flow measuring device having cable strands extending in grooves on the core body within a coil component

A fill level monitoring system comprising at least one electrode for monitoring the fill level of a medium flowing in a pipe or tube, wherein the electrode has an integrated temperature sensor, wherein the fill level monitoring system further comprises an evaluation unit, which is embodied for monitoring the degree of filling of the pipe or tube and transmits a warning signal when the degree of filling subceeds a limit value, preferably a degree of filling of less than 80% of the tube diameter; and a flow measuring device having this fill level monitoring system.

Fill level monitoring system and flow measuring device

An L-shaped sealing ring comprising two legs connected with one another to form an L-shape in cross section. A length of a first leg is part of a lateral surface of revolution about an axis of the L-shaped sealing ring. The first leg lies between the first length and the axis of revolution. A second leg is bounded toward the environment by a second length, wherein the first and second lengths are connected with one another via a connection contour. An intersection of first and second lines, forms a corner of a triangle, wherein the respective end points of the first and second lengths form other vertices of the triangle. The L-shaped sealing ring is so embodied that the surface area of the cross sectional area of the body of the L-shaped sealing ring in the triangle amounts to, at most, 60% of the areal content of the triangle, wherein the area of the L-shaped sealing ring in the triangle is non-concave.

L-shaped sealing ring

A magneto inductive, flow measuring device including a measuring tube and, arranged on the measuring tube, at least one magnet system, which includes a pole shoe. The measuring tube has at least one planar area and an otherwise cylindrical lateral surface, which border the measuring tube from its environment. The pole shoe is so formed relative to the measuring tube that it contacts the planar area of the measuring tube and has a predetermined minimum separation for the otherwise cylindrical lateral surface of the measuring tube. The pole shoe surrounds the measuring tube with a circular arc angle of at least 10&#xb0;.

Magneto inductive flow measuring device having a measuring tube including at least one planar area on which a pole shoe forms contact

A magneto inductive flow measuring device having a measuring tube and at least one magnet system arranged on the measuring tube, wherein the measuring tube has at least one planar area and an otherwise cylindrical lateral surface, which border the measuring tube from its environment, against which planar area the magnet system is prestressed The magnet system is prestressed against the planar area of the measuring tube by means of a screwed connection between measuring tube and magnet system and/or the magnet system is prestressed against the planar area of the measuring tube by means of a mounting clip, which is secured shape-interlocked to the measuring tube. A method for manufacturing the magneto inductive, flow measuring device is also discussed.

Magneto inductive, flow measuring device

An apparatus for measuring volume- or mass-flow of a medium in a pipeline. Included is a measuring tube, through which the medium flows in the direction of the longitudinal axis of the measuring tube; a magnet system, which is embodied in such a manner, that it produces a magnetic field passing through the measuring tube essentially transversely to the longitudinal axis of the measuring tube; at least one measuring electrode coupled with the medium, which is arranged in a bore in the wall of the measuring tube in a region lying essentially perpendicular to the magnetic field. The measuring electrode has an elongated electrode shaft having a first widened end region, which is so dimensioned, that its diameter larger is than the diameter of the bore in the wall of the measuring tube, in which the measuring electrode is placed; and a control/evaluation unit, which, on the basis of a measurement voltage induced in the at least one measuring electrode, delivers information concerning volume- or mass-flow of the medium in the measuring tube. In the opposing, second, end region of the electrode shaft of the measuring electrode, at least one radial recess or at least one radial protrusion is arranged. Furthermore, a binding-element is provided, which is so embodied, that it fixes the measuring electrode in the bore of the measuring tube in the axial direction by engaging with the at least one radial recess or protrusion.

Apparatus for measuring volume- or mass-flow of a medium in a pipeline

An apparatus for measuring and/or monitoring the flow of a medium to be measured, which is flowing through a measuring tube in the direction of the longitudinal axis of the measuring tube. The apparatus includes: A magnet arrangement which produces a magnetic field passing through the measuring tube and running essentially transversely to the longitudinal axis of the measuring tube; two measuring electrodes which are galvanically or capacitively coupled with the medium to be measured and which are arranged in such a manner that a measurement voltage is induced in them, evoked by the medium to be measured; an evaluation control unit, which, on the basis of the measurement voltage induced in the measurement electrodes, provides information concerning the volume flow of the medium to be measured in the measuring tube; wherein connecting lines, or signal lines, as the case may be, are provided, by way of which the measurement signals are led between the measurement electrodes and the control/evaluation unit. In order to be able to arrange the signal lines in a space saving manner, the signal lines are arranged in an essentially planar structure.

Growing community of inventors

Therwil, Switzerland

Günther Bähr