Abb Patent Gmbh

Abb Schweiz Ag

Abb Technology Ag

Jörg Gebhardt

Frank Kassubek

Steffen Keller

René Friedrichs

Lothar Deppe

Kai Hencken

Wolfgang Waldi

Holger Kaul

Yannick Maret

Andrej Krivda

Kuno Hug

Robert Huber

Rolf Disselnkötter

Armin Gasch

Stephan Wildermuth

Wilhelm Daake

Stefan Tabelander

Andreas Decker

Beat Kramer

Tilo Merlin

Guruprasad Sosale

Peter Ude

Rene Friedrichs

Jorg Herwig

Ralf Lesjak

Reinhard Steinberg

Francisco Mendoza

Ulf Ahrend

Matthias Dettmer

Satish Gunturi

Jörg Lehmann

Jürgen Horstkotte

Kai König

Paul Szász

Dirk Petrus Gijsbertus De Jager

John Beniston

Thomas Rodenbusch-Mohr

Jörn Kruse

Falk Zierach

Francisco Mendoza Cervantes

A detection system for detecting an electrical discharge in an electrical apparatus includes a first sensing device that senses an acoustic wave and an electromagnetic wave and generates a first combined signal. A signal processing device processes the first combined signal and determines the occurrence and properties of an electrical discharge.

Method for detecting an electrical discharge in an electrical apparatus and system therefor

The present disclosure provides a detection system that includes a first sensing device configured for sensing an acoustic wave and an electromagnetic wave and generating a first combined signal and a signal processing device configured to determine the occurrence and properties of an electrical discharge.

A sensing arrangement for detection of electrical discharges in an electrical apparatus is described. The sensing arrangement includes an acoustic sensor and a signal enhancing structure with a funnel region. The acoustic sensor is positioned outside the funnel region on an apex side of the funnel region. An electrical switchgear is described. The electrical switchgear includes a sensing arrangement for detection of electrical discharges in an electrical apparatus. The sensing arrangement includes an acoustic sensor and a signal enhancing structure with a funnel region.

Sensing arrangement

The present disclosure provides a method for detecting an electrical discharge in an electrical apparatus. The method includes sensing an electromagnetic wave using an electrical sensor and generating an electric signal for a predetermined time period, sensing an acoustic wave using an acoustic sensor and generating an acoustic signal for the predetermined time period. The acoustic sensor is associated with at least one compartment of the electrical apparatus. Electrical data is generated based on a quasi-periodic characteristic of electric peak sequences of the electrical signal. Acoustic data is generated based on a quasi-periodic characteristic of acoustic peak sequences of the acoustic signal, wherein the electrical data is combined with the acoustic data to provide an operation status of the at least one compartment.

Method for detecting an electrical discharge in an electrical apparatus and a system therefor

A vibration-type measuring device includes an exciter arrangement which exerts a time-dependent force with at least one sinusoidal component at an adjustable excitation frequency on a measuring tube, through which a medium can flow, and causes the measuring tube to oscillate. The measuring device includes first and second sensors which are fitted to the measuring tube at different locations. The first and second sensors output first and second measurement signals, respectively. The measuring device includes an evaluation unit which determines a first phase shift between the first and second measurement signals and uses the determined phase shift to determine a measurement variable of the medium. The measuring device includes a phase comparator, which determines a second phase shift between the force and the average value of the first and second measurement signals, and a frequency generator which sets the excitation frequency on the basis of the second phase shift.

Vibration-type measuring device

The disclosure relates to a Coriolis mass flowmeter with an oscillatable straight measuring tube consisting of a corrosion-resistant metal, in particular of titanium or a titanium alloy, to which are attached mounted parts connected directly to the measuring tube for the implementation of the Coriolis measurement principle. Furthermore, stabilizing elements running parallel to the measuring tube are coupled to the measuring tube via mounted parts connected directly to the measuring tube, the mounted parts and the stabilizing elements consisting of a metal other than that of the measuring tube. The stabilizing elements are manufactured from a second material which possesses a coefficient of thermal expansion adapted to the metal of the measuring tube. The mounted parts connected directly to the measuring tube are manufactured from a third material which possesses a higher coefficient of thermal expansion than the metal of the measuring tube.

Coriolis mass flowmeter with an oscillatable straight measuring tube

A measuring instrument to capture a physical/chemical measured value, including a sensor unit, which is linked via a contactless interface to a transmitter unit, for passing on to a central analysis unit, wherein the sensor unit includes an at least partly internal sensor element which vibrates against a sensor housing because of operation, and which is linked, contactlessly and inside the sensor unit, for sensor signal transmission, via a first transmission/reception unit, to a complementary second transmission/reception unit, which is arranged at a fixed location relative to the sensor housing, and which is also linked, contactlessly and outside the sensor unit, to a third transmission/reception unit of the transmitter unit.

Measuring instrument to capture a physical/chemical measured value

A method is disclosed for producing a connection between a measuring tube and at least one flange, e.g., in the case of a Coriolis mass flowmeter. In order to ensure reliable connection of the components in this case, the measuring tube can be inserted at one end over a portion through a flange bore, such that it projects out of the bore on the other side, and that the projecting end be flared out over the sealing face of the flange.

Method of producing a connection between a measuring tube and at least one flange

A method for compensation for influences, which interfere with the measurement accuracy, in measurement devices of the vibration type, comprising a measurement tube through which a fluid medium can flow and which is caused to oscillate mechanically, acting as an oscillation body, by an excitation unit, whose oscillation behavior, which changes as a function of the flowrate and/or the viscosity and/or the density of the fluid medium, is detected by at least one oscillation sensor in order to determine the flowrate, wherein the material strain in the measurement tube is detected by means of at least one sensor, from which an indicator value for the influence causing the material strain is calculated in order to correct the measurement signal, by signal processing, from the indicator value obtained in this way.

Method and device for compensation for influences, which interfere with the measurement accuracy, in measurement devices of the vibration type

A coriolis mass flow pick-up is disclosed, which can be inserted into a pipeline and has a fluid to be measured flowing through it during operation. The pick-up includes a single measuring pipe, which has an inlet end and an outlet end, an exciter arrangement, which causes the measuring pipe to carry out at least first bending oscillations, and at least two sensors for sensing movement of the measuring pipe. At least two elongate connection parts, which extend freely essentially parallel to the measuring pipe and whose central axes are displaced from the axis of the measuring pipe, are connected on the input side and the output side to the measuring pipe. The connection parts carry out second bending oscillations in the event of an oscillating measuring pipe, with the result that, by the second bending oscillations of the connection parts being superimposed by the oscillations of the measuring pipe, bending forces and torsional moments at the inlet and outlet ends of the measuring pipe are compensated.

Coriolis mass flow pick-up

A device and a method for operating a Coriolis mass flowmeter with at least one measuring pipe, wherein at least two operative assemblies, which can respectively be operated as an exciter (actuator) and/or as a measuring signal pickup (sensor), are attached to the measuring pipe. The operative assemblies are formed as plunger-type armature sensors with a magnetic core. Each operative assembly is operated either as a sensor or as an actuator or simultaneously as an actuator and as a sensor. Each operative assembly is switched over between the operating mode as a sensor and as an actuator by a switch assigned to it.

Device and method for operating a Coriolis mass flowmeter

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

A description is given of a Coriolis mass flowmeter, with a measuring pipe oscillating in coupled flexural and torsional modes. Mechanically connected to the measuring pipe is an attachment which is formed rotationally symmetrically with respect to an axis of rotational symmetry and can be induced to undergo the torsional oscillations of the measuring pipe. The attachment is a multipart body comprising hollow profile rails and/or beams with a closed hollow cross section. The axis of rotational symmetry of the attachment runs parallel to the straight line () (central axis) defined by the centre points () of the cross-sectional areas () of the inlet and outlet of the measured section, or coincide with this line.

Attachment and coriolis mass flowmeter with this attachment

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Mainz, Germany

Jörg Gebhardt