Krohne Messtechnik Gmbh

Rosenberger Hochfrequeńztechnik Gmbh & Co. Kg

Krohne Messtechnik Gmbh Co. Kg

Krohne S.a.

Rosenberger Hochfrequenztechnik Gmbh

Krohne Ag

Ruhr-universitat Bochum

Krohne Messetechnik Gmbh & Co. Kg

Thomas Musch

Michael Gerding

Stephan Neuburger

Michael Deilmann

Martin Fuchs

Christoph Baer

Gordon Notzon

Marcel Van Delden

Peter Awakowicz

Gunnar Armbrecht

Michael Wollitzer

Attila Bilgic

Sven Gröger

Andre Bergner

Burkhard Schiek

Michael Vogt

Nils Pohl

Robert Storch

Ilona Rolfes

Christian Schulz

Achim Matt

Martin Lapke

Timo Jaeschke

Johannes Winkler

Christian Zietz

Stefan Neuburger

Thomas Mussenbrock

Ralf Peter Brinkmann

Achim Bletz

Tim Styrnoll

Jan Abrolat

Jens Oberrath

Sebastian Baer

Jan Drenthen

Christoph Huber

Marcel Johannes Van Delden

The present invention relates to a circuit for switching an AC voltage. It contains an input terminal able to be connected to an AC voltage source, an output terminal able to be connected to a load impedance, and a first series circuit. This series circuit comprises a diode and a circuit for storing electrical charges. The series circuit has a first end connection that is connected to the input terminal and a second end connection that is connected to the output terminal. The circuit for switching an AC voltage furthermore contains a DC voltage source, which is connected to an electrical connection between the diode and the input terminal or to an electrical connection between the diode and the output terminal and is designed to impress a DC current in the diode. The circuit for switching an AC voltage finally contains a first switch that is connected to an electrical connection between the diode and the circuit for storing electrical charges at one terminal. The first switch is designed to switch between a switching state in which a potential dependent on a reference potential is present at the electrical connection between the diode and the circuit for storing electrical charges, and a switching state in which an electrical floating potential is present in the electrical connection between the diode and the circuit for storing electrical charges.

Circuit for switching an AC voltage

An ignition device for igniting an air/fuel mixture in a combustion chamber, in particular of an internal combustion engine, having a spark plug which has a first electrode and a second electrode, having a high voltage source for generating an electrical high voltage pulse at an output of the high voltage source, and having a high frequency voltage source for generating an electrical high frequency alternating voltage at an output of the high frequency voltage source, wherein the output of the high voltage source is connected electrically to the first electrode of the spark plug via a first electrical conduction path in such a way that the high voltage pulse is present at the first electrode, wherein the output of the high frequency voltage source is connected electrically to the second electrode via a second electrical conduction path in such a way that the high frequency alternating voltage is present at the second electrode.

Ignition device for igniting an air/fuel mixture in a combustion chamber

The invention relates to a spark plug () for an internal combustion engine, in particular having a high frequency ignition system, having a central electrode (), a ground electrode () and an electrical insulator () arranged between the central electrode () and the ground electrode (), wherein a central electrode connecting point () for electrically connecting the central electrode () to an ignition system is provided on the insulator (), wherein the central electrode () and the ground electrode () project beyond the insulator () at an axial end () of the spark plug () and each form, with a part projecting axially beyond the insulator (), a central electrode end () and a ground electrode end (), wherein the central electrode end () and the ground electrode end () are arranged and embodied in such a way that an axial region () of a gap () is formed between them in an axial direction, wherein the axial region () of the gap () is spaced apart from the insulator (), wherein at least one additional electrode () is provided which projects beyond the insulator () at the axial end () of the spark plug () and forms, with a part which projects axially beyond the insulator (), an additional electrode end (). In this case the additional electrode () is arranged electrically insulated from the ground electrode () and the central electrode (), on the spark plug (), wherein the additional electrode end () projects into the axial region () of the gap () between the central electrode end () and the ground electrode end () or is arranged into a region () of the gap () which is radially adjacent to the axial region () of the gap (), and as a result divides the gap () into two ignition spark end gaps ().

Spark plug for a high frequency ignition system

An ignition device for igniting an air/fuel mixture in at least one combustion chamber, having an ignition system with electrodes for each combustion chamber, a high-voltage source for generating an electrical high-voltage impulse at an output of the high-voltage source, and a high-frequency voltage source for generating an electrical high-frequency alternating voltage, wherein m ignition systems () are provided with the formula (I) (natural numbers without zero) and m&#x2265;2, wherein &#x3ba; high-frequency voltage sources are provided with the formula (II), and &#x3ba;&#x3c;m, wherein at least one power distributor device is provided which is electrically connected, on the one hand, to at least one high-frequency voltage source and, on the other hand, to n ignition systems, wherein formula (III) and 2&#x2264;n&#x2264;m, the power distributor device transmits the high-frequency alternating voltage or voltages from the high-frequency voltage source or sources to the ignition systems n.

Ignition device and method for igniting an air/fuel mixture

An ignition device for igniting an air-fuel mixture in a combustion chamber, in particular an internal combustion engine, having a spark plug, which has a first electrode and a second electrode, and a high voltage source for generating an electrical high voltage pulse at an output of the high voltage source and having a high frequency voltage source for generating an electrical high frequency alternating voltage at an output of the high frequency voltage source, wherein the output of the high voltage source is electrically connected to the first electrode of the spark plug via a first electrical conductor path such that the high voltage pulse is applied to the first electrode, wherein the second electrode is electrically connected to an electrical ground potential, wherein the spark plug has a third electrode, wherein the output of the high frequency voltage source is electrically connected to the third electrode via a second electrical conductor path, such that the high frequency alternating voltage is applied to the third electrode.

A magnetic-inductive flowmeter with a measuring tube and at least one measuring electrode has at least one opening in its circumferential wall, at least a electrode head of the at least one measuring electrode being arranged in the at least one opening. At least one coil pair has first and second coils that are arranged offset to one another on the circumferential wall of the measuring tube in the axial direction of the measuring tube. The first and second coils are arranged at least partially overlapping to one another in a top view of a cross section through the measuring tube. The at least one measuring electrode is arranged in a peripheral area of the circumferential wall of the measuring tube that is located between the first and the second coil of the at last one coil pair.

Magnetic-inductive flowmeter and corresponding method

A measuring rod () with a longitudinal axis (A) for insertion in the flow cross section of a tube and for the verification of a flowing medium in this tube having at least one first sender unit () for the transmission of a first acoustic or electromagnetic measuring signal () and at least one first receiver unit () for receiving the first measuring signal, wherein the first sender unit () and the first receiver unit () define a measuring section, wherein the first sender unit () is arranged in such a manner that the first measuring signal () crosses the measuring section and wherein the first receiver unit () is arranged in such a manner that it, at least during operation without flow, receives the first measuring signal () after crossing the measuring section.

Measuring rod for verification of a flowing medium in a tube and respective measuring arrangements

A device for determining the fill level of a medium in a container has at least one electronic device and at least one signal conductor arrangement. The electronic device supplies the signal conductor arrangement with electromagnetic signals. To provide a device for determining the fill level that is advantageous compared to the prior art, the signal conductor arrangement has several emitting devices for emitting the electromagnetic signal. A support element that can be inserted in a wall of the container supports the signal conductor arrangement.

Device for determining the fill level of a medium in a container

A method for determining the fill level of a medium () in a container () that is advantageous as compared to the prior art is achieved in that several emitting devices () are supplied with electromagnetic signals and that an emitting behavior of at least a portion of the emitting devices () is evaluated in view of the fill level of the medium ().

A device for determining the fill level of a medium in a container having at least one electronic device and at least one signal conductor arrangement. The electronic device supplies the signal conductor arrangementwith electromagnetic signals. To provide a device for determining the fill level, the signal conductor arrangement has several emitting devices and the electronic device provides at least one measure for an emitting behavior of at least one emitting device.

Device for determining the fill level of a medium

A method and device for determining a velocity of a flowing medium that allows an as high as possible measuring accuracy without requiring a complicated measuring construction is achieved in that a vortex is generated in the medium and an electromagnetic signal is emitted into the medium. Then, the permittivity of the medium is determined and the velocity of the medium is determined using the permittivity measurement.

Method and device for determining the velocity of a medium

A positioning for positioning a measuring element () and a measuring device with such a positioning device have an object of providing a positioning device for positioning a measuring element or a measuring device with a measuring element and a positioning device that is a simplification compared to the prior art and that meets the requirements for positioning with respect to accuracy and reproducibility. The object is met in the positioning device in that three wheels are provided (), which are designed as a ring gear (), a sun and a planetary gear (). The ring has an interior space () in which the sun and the planetary are arranged. Furthermore, the planetary is engaged with the sun and with the ring gear ().

Positioning device and measuring device

The invention relates to a device and method for measuring the density of a plasma by determining an impulse response to a high-frequency signal coupled into a plasma. The density, electron temperature and/or collision frequency as a function of the impulse response can be determined. A probe having a probe head and a probe shaft can be introduced into the plasma, wherein the probe shaft is connected to a signal generator for electrically coupling a high-frequency signal into the probe head. The probe core is enclosed by the jacket and has at its surface mutually insulated electrode areas of opposite polarity. A balun is arranged at the transition between the probe head and an electrically unbalanced high-frequency signal feed to convert electrically unbalanced signals into balanced signals.

Device and use of the device for measuring the density and/or the electron temperature and/or the collision frequency of a plasma

A vortex flow meter () with a measurement tube () through which a medium can flow, a baffle body () for generating vortices in the medium and a deflection body () which can be deflected by the pressure fluctuations which accompany the vortices in the medium. The vortex flow meter seeks to avoid the disadvantages of the implementations of the measurement principle of the prior art there being an electronic unit () which exposes the deflection body () to electromagnetic radiation and receives electromagnetic radiation from the deflection body ().

Vortex flow meter

A circuit arrangement for generation of radio frequency output signals which form a broadband frequency ramp, with a reference oscillator, a phase detector, a loop filter, a VC oscillator for generating the output signals, a frequency divider, a step-down mixer and a local oscillator for generating a local oscillator signal. The reference oscillator, the phase detector, the loop filter, the VC oscillator, the frequency divider and the step-down mixer belong to a phase-locking loop. The frequency divider and the step-down mixer are in the feedback path of the phase-locking loop. The step-down mixer mixes the output signals and the local oscillator signal. The frequency of the output signal is adjustable by varying the division ratio of the frequency divider. Characteristics of the output signal are improved using the adjustable frequency of the local oscillator signal.

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Bochum, Germany

Thomas Musch