Siemens Aktiengesellschaft

Epcos Ag

Enocean Gmbh

Airbus Operations Gmbh

Hamburg Innovation Gmbh

Helmut-schmidt-universitat-universitat Der Bundeswehr Hamburg

Helmut-schmidt-universität

Kunbus Gmbh

Gerd Scholl

Thomas Ostertag

Leonhard Michael Reindl

Werner Ruile

Valentin Magori

Wolf-Eckhart Bulst

Oliver Sczesny

Dieter Lorenz

Ottmar Beierl

Peter Bauerschmidt

Anton Leidl

Markus Hauser

Ulrich Knauer

Ulrich Wolff

Reinhard Maier

Frank Schmidt

Christian Korden

Ulrike Roesler

Ulrike Rösler

Wolfgang Schelter

Frank Neuhaus

Clemens Ruppel

Gerd Riha

Evelyn Riha

J&ouml;rg Gorablenkow

Horst Gerlach

Harald Dalichau

Klaus Lange

Franz Kammerl

Holger Scherr

Ralf Heynicke

Dmytro Krush

Thomas Solzbacher

Christoph Cammin

Elements and methods for forming elements that operate with acoustic waves are disclosed. The element includes a piezoelectric electric substrate that has a first thermal coefficient of expansion, electrically conducting element structures on an upper side of the substrate, a compensation layer on an underside of the substrate, and an SiOlayer over the element structures.

SAW-component having a reduced temperature path and method for the production thereof

An apparatus including a piezoelectric substrate having at least one transducer electrode structure. The structure having a metallization formed by one or more metals with a mean specific density that is at least 50% higher than that of aluminum. The structure having a compensation layer that is applied fully or partially over the metallization. The compensation layer is of a material having a temperature dependence of elastic constants that counteracts the temperature coefficient of frequency of the substrate. The compensation layer has a thickness that is less than 15% of an acoustic wavelength of a wave capable of propagation in the structure.

SAW component having an improved temperature coefficient

An apparatus and method for generating coded high-frequency signals, having a converter, which converts non-electrical primary energy available from the surroundings into electrical energy, an element with a nonlinear characteristic curve, which is coupled to the converter, and a coding device coupled to the element with a nonlinear characteristic curve.

Apparatus and method for generating coded high-frequency signals

Radio-interrogated surface-wave technology sensor, in which the sensitive element ( ) is an impedance which is electrically connected as termination to a surface-wave structure ( ) of the sensor.

Radio-interrogated surface-wave technology sensor

In a high-voltage installation having at metallic encapsulating housing, a cone antenna is provided as a device for transmitting electromagnetic signals. The cone tip antenna facing the inner wall of the encapsulating housing resulting in an optimal coupling characteristic.

High voltage installation with a device for transmitting signals

An encapsulated installation, in particular a switching installation for high or medium voltage, includes a plurality of sensors located in an interior of an encapsulation. A central monitoring device is provided for information interchange with the surface acoustic wave sensors. An antenna element of the monitoring device is disposed at the encapsulation and is directed towards the interior. The sensors can be interrogated selectively.

Encapsulated installation

An encapsulated tubular conductor having at least two antenna elements disposed on the capsule thereof for maintaining therebetween wireless information transmission in a transmitting-receiving direction, and a transmitting-receiving device located outside the capsule and assigned to one of the antenna elements includes another transmitting/receiving device also disposed outside the capsule and assigned to the other of the antenna elements, the antenna elements being directed towards an interior space of the capsule, the interior space serving as a transfer path via which information is transferable between the transmitting-receiving devices.

Encapsulated tubular conductor

A method for detecting the position of a switching device and an encapsulated switching installation having at least one switching device. A transmitted signal is emitted into the interior of an encapsulation to make it possible to easily detect the position of a switching device in an encapsulated switching installation. A resultant reflection signal is received and stored. After a repetition of this process, the two received reflection signals are compared with one another. In the event of any discrepancy, a message signal is produced for the new switching state.

Method of detecting the position of a switching device and encapsulated

A metalclad switchgear assembly for high or medium voltage, having a cladding, includes at least one sensor arranged in an interior space of the cladding for detecting a condition variable within the cladding, the sensor having an antenna; and a transmitting and receiving antenna directed towards the interior space, the transmitting and receiving antenna serving for performing a wireless information interchange with the sensor, and for simultaneously detecting electromagnetically partial discharges in the interior space.

Metalclad switchgear assembly with partial discharge detection

A pressure sensor with a reflective acoustic surface wave (SAW) delay line fashioned on a pressure-sensing membrane having at least three reflectors wherein the delay line extends over both an expanding region and a compressing region of the pressure-sensing membrane.

Pressure sensor using elements operating with acoustic surface waves

A radio-interrogated, surface-wave technology current transformer for high/medium-voltage systems includes a magnetosensitive element connected to a surface-wave structure of a surface-wave configuration as a termination of the surface-wave structure. A response signal of the surface-wave configuration is information regarding current strength/direction and phase of the current instantaneously flowing through the system, which is evaluated by a ground station. By virtue of the radio transmission, there is no electrical insulation problem, and the use of a radio-interrogated surface-wave configuration makes that part of the overall current transducer which is at high potential into a passive element of the same.

Radio-interrogated, surface-wave technology current transformer for

An identification and/or sensor system includes an identification and/or sensor configuration having resonators for determining at least one parameter to be interrogated. The resonators have a quality being good enough to effect a storage of energy in the resonators. A transmitting and receiving apparatus transmits interrogation signals by radio to the identification and/or sensor configuration and receives and evaluates reply signals transmitted back from the identification and/or sensor configuration. The transmitting and receiving apparatus is a broadband device.

Identification and/or sensor system

Growing community of inventors

Hamburg, Germany

Gerd Scholl