Endress + Hauser Flowtec Ag

Thomas Froehlich

Klaus Bussinger

Torsten Strunz

Harald Stocker

Achim Wiest

Andreas Berger

Oliver Brumberg

Matthias Altendorf

Auréle Fleury

Aurèle Fleury

A method for ascertaining volume- or mass-flow of a medium in a pipeline, or measuring tube, of radius (r) via a sound entrainment method, wherein ultrasonic measuring signals are transmitted and/or received along a plurality of defined sound paths (m). During a calibration phase, successive, different flow profiles (v(r)) of a measured medium are established in the pipeline, or in the measuring tube, and wherein, for each flow profile (v(r)), a defined volume flow, or a defined mass flow, is ascertained, wherein, on the basis of measured values (v(r) . . . v(r)) ascertained in the separate measuring paths (m), each flow profile (v(r)) established in the pipeline, or in the measuring tube, is described by a characteristic parameter set (a, . . . , awith n&#x3b5;N) and wherein, for each flow profile (V(r)), on the basis of the defined volume- or mass-flow and on the basis of the measured volume- or mass-flow, a flow-profile-dependent correction factor MF(a, . . . , a) is calculated, and wherein, subsequently in measurement operation, a volume- or mass-flow ascertained via the parameter set (a, . . . , a, with n&#x3b5;N) is corrected with the flow-profile-dependent correction factor MF(a, . . . , a) determined during the calibration phase.

Method for ascertaining volume&#x2014;or mass&#x2014;flow of a medium

A method for system- and/or process-monitoring in the case of an ultrasound flow measuring device having a plurality of measuring channels, wherein a medium flows though a pipeline or measuring tube in the direction of a longitudinal axis of the pipeline or measuring tube. Ultrasonic measuring signals are coupled into the pipeline or measuring tube and coupled out of the pipeline or measuring tube in such a way that they travel through the medium along different sound paths. Following passage through the pipeline or measuring tube, the ultrasonic measuring signals are detected in the individual measuring channels, wherein at least one actual quantity describing the ultrasonic measuring signal of each measuring channel is ascertained. The actual quantity is compared with a desired quantity captured under predetermined system- or process-conditions, and a report is output in the case of a difference between the ascertained, actual quantity and the captured, desired quantity.

Method for monitoring an ultrasound flowmeter system and/or process

An ultrasonic flow measuring device which provides a flow measuring device characterized by a low electrical current consumption and low power uptake. At least one component of high power uptake with a control/evaluation unit is provided, with the control/evaluation unit being designed such that the component of high power uptake is operated intermittently in a measuring phase and in an idle phase, with the component being activated in the measuring phase, while, in the idle phase, the component exhibits a reduced power uptake or is completely turned off.

Device for determining and/or monitoring the volume, and/or mass, flow rate of a medium

Flowmeter comprising at least two ultrasonic transducers that are mounted on a container which is penetrated by a medium in a certain direction of flow. The ultrasonic transducers alternately transmit and receive ultrasonic test signals in the direction of flow and counter to the direction of flow. The flowmeter further comprises a control/evaluation unit which determines and/or monitors the volume flow of the medium inside the container based on the difference in the travel time of the ultrasonic test signals propagating in the direction of flow and counter to the direction of flow. The ultrasonic transducers are configured such that they transmit and receive ultrasonic test signals or sound fields having a large aperture angle or a great beam expansion.

Flowmeter mounted on a containment

An apparatus for the positioning of a clamp-on flow measuring device on a containment, which has a medium flowing through it. The apparatus includes at least two ultrasonic transducers, which emit measuring signals into the containment and/or receive measuring signals from the containment, a positioning unit for the variable positioning of the ultrasonic transducers on the containment, a control/evaluation unit, which calculates from predetermined process and/or system variables a characteristic, desired variable of the measuring signals and which determines on the basis of a comparison of the calculated, desired variable with the corresponding, measured, actual variable, whether the ultrasonic transducers are optimally positioned or whether the position of the ultrasonic transducers need to be changed, and an indicating unit, which indicates to operating personnel a required change of position and/or the direction in which a change of position needs to be made.

Device for positioning a clamp-on flowmeter on a container

A method and a device for determining and/or monitoring the volume flow rate and/or mass flow rate of a medium flowing through a container. In the case of the device, such is an ultrasonic flow measuring device, which works on the basis of the travel-time-difference principle. Additionally, a technique is presented whereby, on the basis of the results of measurement, also information is provided concerning change in some other system and/or process variable. To this end, the currently measured, actual measuring signals, or the corresponding actual measuring data, is compared with corresponding, stored set measuring signals, or set measuring data; a report is output, when a deviation arises between the set measuring signals, or set measuring data, and the actual measuring signals, or actual measuring data.

Growing community of inventors

Münchenstein, Switzerland

Thomas Froehlich