Load-receiving arrangement for wind turbine wings
OwnerAloys Wobbeninventor
Life of this patent
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Abstract
A rotor blade of a wind power plant, comprising a rotor blade connection for connection to a hub of the rotor of a wind power plant and a blade tip disposed at the opposite end of the rotor blade. In order to provide a rotor blade in which flexing can be detected with simple means, at least one electrical conductor is laid over the length of the rotor blades, wherein the electrical conductor begins at the rotor blade connection, extends in the longitudinal direction of the rotor blade and back to the rotor blade connection, and that there is provided a detector which detects the electrical resistance of the conductor and is connected to an evaluation device which evaluates the electrical resistance.
Claims31
A rotor blade of a wind power plant, comprising a rotor blade connection for connection to a hub of the rotor of a wind power plant and a blade tip disposed at the opposite end of the rotor blade, characterized in that at least one electrical conductor is laid over the length of the rotor blade, wherein the electrical conductor begins at the rotor blade connection, extends in the longitudinal direction of the rotor blade and back to the rotor blade connection, and that there is provided a detector which detects the electrical resistance of the conductor and that the detector is connected to an evaluation device which evaluates the electrical resistance.
A process and apparatus for measuring the flexing or change in length of a product, namely a rotor blade or a pylon of a wind power plant, wherein laid in the product is a conductor which upon flexing and/or a change in length of the product experiences a change in length, wherein a signal, preferably a pulse signal, is generated by means of a signal generator and fed into the line at the first input thereof, wherein arranged at the second end of the line is a signal receiver which upon reception of the signal from the signal generator causes same to emit a further signal, and that there is provided a device by means of which the number of emitted signals within a predetermined unit of time is measured and the flexing and/or increase in length of the product can be ascertained from the comparison of the measured number of emitted signals per predetermined unit of time with a stored table.
A process and apparatus for measuring the flexing or change in length of a product, namely a rotor blade or a pylon of a wind power plant, wherein laid in the product is a conductor which upon flexing and/or a change in length of the product experiences a change in length, wherein a signal, preferably a pulse signal, is generated by means of a signal generator and fed into the line at the first input thereof, wherein however arranged at the second end of the line is a reflector which reflects the signal from the signal generator to the first end of the line where it is received at the input by a signal receiver and which then triggers the above-described triggering of a further signal by the signal generator, wherein the signal generator and the signal receiver are connected together and the time between signal reception and triggering of a consequential signal by the signal generator is always substantially constant.
An apparatus for measuring distortion of a blade, comprising:
- a blade comprising a first end and a blade tip, wherein the first end and the blade tip are located at opposite ends of the length of the blade;
- a conductor extending longitudinally from adjacent the first end of the blade a predetermined distance along the length of the blade toward the blade tip, the conductor being coupled to the blade structure;
- and
- a detector coupled to the conductor and configured to detect changes in the length of the conductor.
Dependencies are inferred from the claim text.