Abb Research Ltd.

Abb Schweiz Ag

Abb Ag

Abb Patent Gmbh

Armin Gasch

Wolfgang Scholz

Raiko Milanovic

Peter Krippner

Paul Szasz

Rolf Merte

Peter Riegler

Wolfgang Lasarzik

Frank Kassubek

Detlef Pape

Albrecht Vogel

Andreas Stelter

Steffen Keller

Jörg Gebhardt

Kuno Hug

Wolfgang Waldi

Thomas Kleegrewe

Lothar Deppe

Urs E Meier

Wilhelm Daake

Thomas Karte

Andrea Moroni

Fabrizio Lorito

Rene Friedrichs

Jorg Herwig

Emrullah Altiok

Nicolaie Laurentiu Fantana

Roberto Zucchi

Peter Reigler

Jürgen Biskup

Franco Vecchiato

Corrado Bianchi

Eugenio Volonterio

Paul Szász

Steffen Dr-Ing Keller

Rene Dipl-Phys Friedrichs

Jörg Dipl-Ing Herwig

Jörg Dr-Ing Gebhardt

Wolfgang Dipl-Ing Waldi

A pressure measurement device for determining a pressure of a fluid located inside a cylindrical casing includes: at least one sensor for determining a force acting thereon; and a clamp for peripheral attachment to the casing. The at least one sensor is arranged inside the clamp and is operatively connected thereto. The clamp includes a peripheral link chain having chain links that are pivotably coupled to one another at end joints, and a closure device that interacts with a first chain link and a final chain link.

Device for the non-intrusive measurement of the pressure of a fluid inside a cylindrical casing using chain links

In an embodiment, the present invention provides a device for measuring the pressure p of a fluid flowing through a pipeline, including: at least one primary sensor arranged on an outer periphery of the pipeline for measuring a primary physical measured variable which is dependent on the pressure p, the absolute value of the pressure p being obtainable by offsetting said primary physical measured variable against at least one calibration datum, the at least one calibration datum relating to the geometry and/or to at least one material property of the pipeline; and a calibration datum determining unit and an evaluation unit for determining the pressure p from the primary physical measured variable in conjunction with the calibration datum. The calibration datum determining unit includes a measuring pipe which can be fluidically connected to the pipeline, which differs from the rest of the pipeline in material and/or in cross-sectional geometry.

Device for measuring the pressure of a fluid flowing through a pipeline

The invention relates to a process control system having measuring devices and actuators. All of the measuring devices and actuators process information and exchange data amongst themselves. All measuring devices and actuators are interconnected to enable a bi-directional data exchange. Several, or all of the measuring devices and actuators can exchange data with a service unit that can be connected to the devices and actuators. The invention also relates to a method for operating a process control system of this type.

Process control system and method for operating a system of this type

The disclosure relates to a control device for a pneumatically operated actuator in the field of process automation, in particular for continuous control of material flows in the industrial environment. The control device has a communications interface for receiving an electrical setpoint value, and an output for the output of a pneumatic fluid, whose pressure is varied as a function of a control deviation. The received electrical setpoint value is suitable as a process parameter. The control device is connected via a communications channel to an actual-value encoder, which is designed to output an electrical signal corresponding to the actual value of the same process parameter.

Control device for a pneumatically operated actuator

The invention relates to a pressure sensor, the measuring cell of which is provided with at least one membrane for the protection of the pressure-sensitive element and a measuring chamber, filled with pressure medium, in which the pressure-sensitive element is housed. According to the invention, the membrane is monitored for damage, whereby at least one surface wave sensor is arranged in the chamber filled with pressure medium. On damage to the membrane occurring, process medium is mixed with the pressure medium. A substance change in the sensitive region of the surface wave sensor is thus brought about which results in a differing signal run time. Any change in run time is an indictor of damage to the pressure sensor and may be signaled as such.

Pressure transponder with surface acoustic wave sensor

The invention relates to a device and a method for the status monitoring of a pressure measuring unit in an absolute or differential or relative pressure transducer, a pressure-sensitive element installed in the pressure measuring unit being impinged with at least one pressure generated by at least one membrane. During a defined diagnosis time interval, a testing element integrated in the pressure measuring unit is induced to undergo a change in volume, preferably by electrical activation. The pressure difference caused as a result in the pressure measuring unit is registered by a pressure-sensitive element. The curve registered during a diagnosis time interval is compared with a reference curve recorded with the pressure measuring unit intact. A fault indication is given if the deviations between the registered curve and the reference curve exceed predetermined tolerance values.

Device and method for the status monitoring of a pressure measuring unit

Coriolis mass flowmeter with a measuring pipe () vibrating in coupled flexural and torsional modes, characterized in that an attachment () which is formed rotationally symmetrically with respect to an axis of rotational symmetry and can be made to undergo torsional oscillations of the same frequency, but opposite phase, in relation to the torsional oscillating modes of the measuring pipe () is mechanically connected to the measuring pipe () and the axis of rotational symmetry of the attachment runs parallel to the straight line () (central axis) defined by the center points () of the cross-sectional areas () of the inlet and outlet of the measured section or coincides with this line.

Coriolis mass flowmeter

An apparatus for measuring a contact pressure exerted by a winding compression element on a winding in a power device such as a power transformer includes a sensor having a sensor element which reacts to pressure or strain. The sensor is disposed in the winding compression element. The sensor is configured to communicate, via a radio link, with an electronic checking device.

Apparatus for measuring a contact pressure of a winding compression element in a power transformer

A method for determining flow velocities conducts an electromagnetic signal through a fluid flowing in a delivery line and additionally conducts the electromagnetic signal in a spatially delayed manner. A velocity, a velocity profile, and a volumetric fraction of each of the components of the fluid interacting with the electromagnetic wave is determined from a Doppler shift between the original electromagnetic signal and a resulting electromagnetic signal. An apparatus for determining flow velocities is also provided.

Method and apparatus for determining flow velocities

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Speyer, Germany

Armin Gasch