Siemens Aktiengesellschaft

Siemens Aktiengesell Schaft

Siemens Aktiengesellschsft

Siemens Aktiengellschaft

Siemens Aktiengsellschaft

Siemens Aktiengelsellschaft

Thomas Bosselmann

Michael Willsch

Peter Menke

Klaus Huber

Zal N Sanjana

Stefan Hain

Stephan Mohr

Francisco Javier Sevilla Perez

Nils Theune

Henrik Stiesdal

Siegfried Birkle

Rainer Hartig

Franz Eiermann

Oliver Schuetz

Ottmar Beierl

Joachim Niewisch

Dierk Schröder

Hartmut Bartelt

Andreas Schicht

Peter Kr&auml;mmer

Emil Brutsch

Mario Wollenhaupt

Michael Villnow

Ingolf Baumann

Nils-Michael Theune

Emil BRÜTSCH

A temperature sensor arrangement for gas turbines is provided. The temperature sensor arrangement has a measuring probe. The measuring probe has a bore in which a steel tube is guided so as to be axially movable. The steel tube includes a glass fibre having Bragg grating measurement points for measuring the temperature. Elongate measurement openings enable hot gas to flow through the measuring probe, flowing round the steel tube in the region of the Bragg grating.

Temperature sensor arrangement

A device for generating exhaust gas including a exhaust gas channel and a system. The system includes: a plurality of Bragg gratings distributed in positions transversely to the direction of flow of an exhaust gas at the end of the exhaust gas channel; an optical wave guide structure includes at least one optical wave guide and the Bragg gratings; and a heating device arranged adjacently to the Bragg gratings and through which the Bragg gratings are subjected to heat, or a cooling device arranged adjacently to the Bragg gratings, through which the Bragg gratings can be subjected to cold. The optical wave guide structure and the heating device or the cooling device are arranged at the end of the exhaust gas channel at a distance from an outlet of the exhaust gas into the surroundings of the device.

Device generating exhaust gas, especially a boat, comprising a system for determining the volume of exhaust gas

A system is disclosed, including: a plurality of Bragg gratings distributed in positions transversely to the direction of flow of an exhaust gas in an exhaust gas channel of the device; an optical wave guide structure including at least one optical wave guide and in which the Bragg gratings are embodied; a heating device arranged adjacently to the Bragg gratings and through which the Bragg gratings are subjected to heat, or a cooling device arranged adjacently to the Bragg gratings, through which the Bragg gratings are subjected to cold; at least one light source for irradiating light into the optical wave guide structure; and at least one signal processing device which determines, from light backscattered from Bragg gratings in the optical wave guide structure against its original direction of diffusion, the speed of the flow of the exhaust gas.

System for determining exhaust gas volume

A fiber-optic vibration sensor for generators in power stations is disclosed. The sensor includes an optical fiber which has a freestanding end, wherein the freestanding end is caused to oscillate under the influence of vibrations, and the resulting oscillations are detected as a measure for the vibrations. Only the net weight of the optical fiber serves as a centrifugal mass.

Fiber-optic vibration sensor

A wind energy installation is disclosed. The wind energy installation includes a rotor with at least one rotor blade. The wind energy installation includes at least one wind speed measuring system. The at least one wind speed measuring system optically measures the vibrations of an optical fiber due to vortex shedding.

Wind energy installation comprising a wind speed measuring system

A rotor blade of a wind energy installation has a wall forming an outer shell, and at least one pressure measurement device arranged inside the rotor blade. The pressure measurement device includes a hollow body that is closed in a gastight fashion and has at least one pressure-dependent deformable diaphragm. At least one optical strain sensor is non-positively connected to each diaphragm. In a method using the pressure measurement device, the wind force is determined at wind energy installations by an evaluation unit which determines a comparison value indicating the difference between the pressure at the side of the outer shell facing the wind and the pressure at the side of the outer shell averted from the wind. A measured value for the wind force acting on the rotor blade is determined from the comparison value. The method can be used for optimized operation and/or protection of wind energy installations.

Pressure measurement device and method for determining wind force at wind energy installations

A flowmeter determines the flow direction of a fluid. The flowmeter has a measuring element, around which the fluid flows and which comprises at least one fiber-optic cable and at least two electrical heating elements that lie adjacent to the fiber-optic cable(s) by a respective heat stream emanating from the respective heating element and directed towards at least one fiber-optic cable, the directions of the heat streams being at least proportionately reversed. In addition, the values of the individual heat streams can be influenced to different extents, depending on the flow direction of the fluid. An electromagnetic wave that can be coupled into the fiber-optic cable(s) can also be influenced according to the temperature of the fiber-optic cable(s). Additionally, the flow meter has a control unit, which is used to feed electric energy to the two or more heating elements one after the other, and an evaluation unit, which is used to evaluate the temperature effect of the electromagnetic wave that emanates from the individual heat streams and to determine the flow directed of the fluid.

Flowmeter having at least two optical waveguides and one controlled electrical heating element for determining a flow direction

A method determines the layer thickness of a TBC coating of at least one blade of a non-positive-displacement machine. To this end, at least one electromagnetic wave is emitted to the surface of the at least one blade, the at least one electromagnetic wave is then at least partially reflected by the at least one blade, and the reflected portion of the at least one electromagnetic wave is received and subsequently processed. In addition, the at least one electromagnetic wave is emitted with a frequency matched to the layer thickness of the TBC coating, and the phase of the at least one electromagnetic wave is compared with the phase of the at least one received electromagnetic wave. The at least one emitted electromagnetic wave undergoes a phase change during reflection and the layer thickness of the TBC coating is determined by the phase comparison.

Method for determining the layer thickness of a TBC coating of at least one blade of a non-positive-displacement machine, a corresponding TBC layer thickness measuring device for carrying out the method and use of the method and the TBC layer thickness measuring device

A device for determining distance between a rotor blade and a wall of a gas turbine surrounding the rotor blade is provided. A waveguide guides and emits electromagnetic waves of at least one frequency in the direction of the rotor blade through a waveguide opening facing the rotor blade. The electromagnetic waves are injected into the waveguide and reflected portions of the electromagnetic waves are received. An evaluation unit compares the phase of the electromagnetic waves to be injected with the phase of the reflected portions of the electromagnetic waves and determines phase comparison values for every frequency and the distance is determined based on the phase comparison values. The waveguide comprises a sealing element which is configured to be transmissible for the electromagnetic waves of the frequency and which has two opposite surfaces in the direction of guidance of the electromagnetic waves.

Device for determining the distance between a rotor blade and a wall of a turbine engine surrounding the rotor blade

A method of non-destructively testing a work piece is disclosed, wherein the work piece is placed within an active field of a positioning system; a frame of reference of the work piece is established based on the geometry of the work piece in the coordinates of the positioning system; the geometry of the work piece is detected by determining the position of specific transponders, which are fixed to the work piece, by the positioning system or the geometry of the work piece is detected by scanning at least parts of the contour of the work piece with a transponder of the positioning system; testing data is acquired for the work piece with a non-destructive testing probe, which comprises a transponder of the positioning system, while the position of the testing probe is recorded by the positioning system; the position of the testing probe is transformed into an intrinsic position defined with respect to the frame of reference of the work piece; and the intrinsic position of the testing probe is assigned to the testing data recorded at the respective position. Moreover, a non-destructive testing arrangement is provided.

Method of non-destructively testing a work piece and non-destructive testing arrangement

A device for determining distance between a rotor blade and a wall of a gas turbine surrounding the rotor blade is provided. A waveguide guides and emits electromagnetic waves in the direction of the rotor blade through a waveguide opening facing the rotor blade. The electromagnetic waves are injected into the waveguide and reflected portions of the electromagnetic waves are received. An evaluation unit compares the phase of the electromagnetic waves to be injected with the phase of the reflected portions of the electromagnetic waves and determines phase comparison values for every frequency and the distance is determined based on the phase comparison values. The waveguide includes two waveguide segments made from different materials having temperature stability and damping capacity increasing in the direction from the segment connected to the unit for injecting the waves to the segment having the waveguide opening.

An optical device for monitoring a rotatable shaft is disclosed. The optical device has an optical waveguide arranged on the rotatable shaft and an optical sensor. The optical device further has a transmitting unit transmit the light signal, a transfer device to transmit the light signal between the transmitting unit and the optical waveguide and an evaluation unit for determining a physical variable from a light signal coming from the optical sensor and transferred by the transfer device, the evaluation unit being associated with the transmitting unit. The transfer device has an optical 'multimode' waveguide associated with a coupling device, the waveguide being associated with the transmitting unit and a further optical 'multimode' waveguide, with an associated coupling device associated with the optical waveguide and arranged on the rotatable shaft eccentrically to its axis.

Optical device for monitoring a rotatable shaft with an oriented axis

A flowmeter determines the flow direction of a fluid. The flowmeter has a measuring element, around which the fluid flows. The measuring element has fiber-optic cable and at least two electrical heating elements that lie adjacent to the fiber-optic cable(s) by which a respective heat stream emanating from the respective heating element and directed towards the fiber-optic cable, the directions of the heat streams being at least proportionately reversed. In addition, depending on the flow direction of the fluid, the individual heat streams are correlated to different extents with the flow direction. An electromagnetic wave that can be coupled into the fiber-optic cable(s) can also be influenced according to the temperature of the fiber-optic cable(s). Additionally, the flowmeter has a control unit, which is used to feed electric energy to the two or more heating elements, one after the other, and an evaluation unit, which is used to evaluate the temperature effect of the electromagnetic wave emanating from the individual heat streams and to determine the flow direction of the fluid.

Flowmeter for determining a flow direction

The invention relates to a method for determining the temperature of a surface coating of rotating blades mounted in a non-positive-displacement machine with a rotor shaft rotationally mounted in a housing, during which electromagnetic waves are emitted in a duct in an area of the rotating blades by at least one means for generating electromagnetic waves. The electromagnetic waves are reflected, at least in part, by at least one rotating blade. The reflected portions of the electromagnetic waves are received by at least one receiving means and the temperature of the surface coating of the rotating blades is determined from a distribution of intensity of the received electromagnetic waves. The invention also relates to a method for determining the temperature of a surface coating of guide vanes mounted in a rotationally fixed manner in a non-positive-displacement machine with a housing, and to a device for carrying out the method.

Method for determining the temperature of a surface coating

The method serves to determine the vibrational state of turbine blades, arranged on a rotor shaft, mounted such as to rotate in a housing and/or of guide vanes. At least one electromagnetic wave is transmitted into a flow channel in the vicinity of the blades, using means for the generation of at least one electromagnetic wave. The electromagnetic waves are at least partly reflected from at least one blade. The reflected part of the at least one electromagnetic wave is received by means for receiving and the vibrational state of the corresponding blade is determined from a signal corresponding to the at least one received electromagnetic wave.

Growing community of inventors

Marloffstein, Germany

Thomas Bosselmann