Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Wölfel Engineering Gmbh & Co. Kg.

Bernd Frankenstein

Lars Schubert

Daniel Fischer

Ralf Rieske

Olaf Roeder

Uwe Lieske

Frank Schubert

Bianca Weihnacht

Constanze Tschoepe

Eberhard Schulze

Herbert Friedmann

Fritz-Otto Henkel

Carsten Ebert

Thomas Klesse

Constanze Tschöpe

Olaf RÖDER

Embodiments of the present invention provide a device for obtaining information about one or more living beings. The device comprises an actuator, a sensor and an evaluator. The actuator is configured to output an excitation signal for exciting the living being(s). The sensor is configured to detect a signal generated by the living being(s) in reaction to the excitation signal, to obtain a detected signal. The evaluator is configured to evaluate the detected signal so as to obtain the information about the living being(s).

Device and method for obtaining information about one or more living beings

The invention relates to a method for monitoring the condition of rotor blades for wind turbines. It is therefore the object of the invention to increase the accuracy of the monitoring of the condition of rotor blades of wind turbines and to allow a localization of faults or defects and their exact description. In the method in accordance with the invention, eigenvibrations of a rotor blade occurring globally at the rotor blade and locally guided elastic waves are permanently detected with time and spatial resolution using a sensor network and actuator network attached to the rotor blade or using a network arrangement of ultrasound transducers. In addition, elastic waves which are guided periodically at predefinable time intervals and which are respectively emitted by an actuator or ultrasound transducer and detected by sensors or ultrasound transducers are in so doing inspected for variations of the emitted waves.

Model-based method for monitoring the condition of rotor blades

Some examples relate to a system for monitoring the condition of rotor blades at wind turbines. A plurality of sensor nodes can be coupled to a rotor blade. A respective at least one sensor can be present at the individual sensor nodes for the spatially resolved detection of vibrations and/or acoustic waves of the rotor blade and the sensor nodes can be connected via optical fibers to a central supply and reception unit. A light source can be present at the central supply and reception unit and electromagnetic radiation can be conducted from it via an optical fiber to a photovoltaic converter with which the received electromagnetic radiation can be converted into electric energy. The electric energy can be utilized.

System for monitoring the condition of rotor blades at wind turbines

Growing community of inventors

Ullersdorf, Germany

Bernd Frankenstein