Endress + Hauser Flowtec Ag

Thomas Fröhlich

Klaus Bussinger

Oliver Berberig

Harald Stocker

Achim Wiest

Andreas Berger

Oliver Brumberg

Beat Kissling

Patrick Oudoire

Frank Wandeler

Matthias Altendorf

Torsten Strunz

Mike Touzin

Joe Schaffer

Dean Sylvia

Quirin Müller

Aurele Fleury

Jacobson Saul

Saul Jacobson

A clamp-on ultrasonic flowmeter includes pairs of ultrasonic transducers arranged on an exterior of a pipeline, and an electronic measuring/operating circuit for operating the transducers and for registering and evaluating measurement signals and for providing measured values of volume flow or flow velocity. The pairs are implemented as 1-traverse or 2-traverse pairs. One-traverse pairs are arranged on opposite sides of the pipeline, and 2-traverse pairs are arranged on a same side of the pipeline. At least three pairs are arranged on the pipeline and are distributed peripherally. Adjoining pairs of a number of pairs have an inner angle down to a minimum inner angle (MIA) between one another measured about a pipeline axis, which minimum inner angle obeys the following relationship:MIA=360°/(())with T as number of traverses and F(T,N)=0.38+0.62*T+(0.048−0.01*T{circumflex over ( )}2)*(N−2){circumflex over ( )}2.

Berclamp-on ultrasonic flowmeter

An ultrasonic flow measuring device, which determines volume and/or mass flow of a medium in a pipeline, or in a measuring tube. The flow measuring device includes a plurality of ultrasonic sensors, which emit and/or receive ultrasonic measurement signals along defined sound paths. The control/evaluation electronics of the flow measuring device is divided into an on-site electronics, in which at least one switch is provided, via which the ultrasonic sensors, arranged in different sound paths, can be driven and/or queried, and at least one remote, control/evaluation unit, wherein the control/evaluation unit so switches the at least one switch, that the driven and/or queried, ultrasonic sensor, or the driven and/or queried pair of ultrasonic sensors, is activated and provides measured values.

Apparatus for determining and/or monitoring volume and/or mass flow of a medium

A device for determining and/or monitoring the volume, and/or mass, flow of a medium flowing through a containment in a stream direction. The device includes: At least one ultrasonic transducer, which emits and/or receives ultrasonic measuring signals; and a control/evaluation unit, which determines the volume, and/or mass, flow of the medium in the containment on the basis of the ultrasonic measuring signals according to the travel time difference principle or the Doppler principle. A first clock-pulse generator having a first pulse rate and a second clock-pulse generator having a second pulse rate are provided, with the first pulse rate of the first clock-pulse generator being greater than the second pulse rate of the second clock-pulse generator. The control/evaluation unit operates the first clock-pulse generator intermittently. The control/evaluation unit sizes the duration of a switch-on, or measuring, phase and/or a resting phase as a function of the available energy.

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

A pulse generator including a control logic operating, by control pulses, a switch connected on the input side with a voltage supply unit and delivering a pulse voltage on the output side, there is connected, between control logic and the switch, a capacitor, which decreases the pulse voltage when the pulse frequencies are too low, and, additionally, arranged between voltage supply unit and switch, an RC-member, which decreases the pulse voltages when the repetition rates of the control pulses are too high, in order to enable use of the pulse generator in the explosion-protected area.

Pulse generator for an ultrasound flowmeter

A sonic- or ultrasonic flowmeter, suitable for replacement of differential pressure flowmeters, comprising: a pipe segment, to be connected to a first and a second pipe, each having a diameter, which complies to an industry standard for pipe diameters used in differential pressure flow measurement, having a length (L), which is equal to a standard length for a flow restricting element of a differential pressure flowmeter, having a diameter (D), which is equal to a standard for pipe diameters used in differential pressure flow measurement, comprising a first standard connector located on a first end of the pipe segment, and a second standard connector located on a second end of the pipe segment, a primary flow sensor, comprising at least one sonic- or ultrasonic transducer for transmission and/or reception of sonic- or ultrasonic signals through the pipe segment, mounted on the pipe segment, and a sensor electronic for providing a measurement signal representing a flow of fluid through the pipe segment, based on signals received by the sonic- or ultrasonic transducers.

Sonic- or ultrasonic flowmeter

Growing community of inventors

Munchenstein, Switzerland

Thomas Fröhlich