wind turbine rotor, a wind turbine and use thereof

Abstract

The invention relates a wind turbine rotor. The rotor comprises at least one wind turbine blade, at least one image capturing device, and one or more markers arranged on the blade so that the at least one image capturing device may detect the position of the markers. The invention further relates to a wind turbine and use thereof.

1 . A wind turbine rotor, comprising:
 a hub,   at least one wind turbine blade, wherein said at least one wind turbine blade being mounted on said hub,   at least one image capturing device, and   two or more markers arranged on said blade so that said at least one image capturing device may detect the position of said markers,   wherein said at least one image capturing device is connected to the hub or is connected rigidly to said blade.   
     
     
         2 .- 6 . (canceled) 
     
     
         7 . The wind turbine rotor according to  claim 1 , wherein one or more of said two or more markers each defines a point-like marking. 
     
     
         8 . (canceled) 
     
     
         9 . (canceled) 
     
     
         10 . The wind turbine rotor according to  claim 1 , wherein at least one of said two or more markers is arranged on an inside surface of said blade and/or wherein at least one of said two or more markers is arranged on an outside surface of said blade. 
     
     
         11 . (canceled) 
     
     
         12 . (canceled) 
     
     
         13 . The wind turbine rotor according to  claim 1 , wherein said two or more markers are mutually displaced in a longitudinal direction of said blade and/or wherein said two or more markers are mutually displaced in a chord direction of said blade and/or in a direction perpendicular to said chord direction of said blade. 
     
     
         14 . (canceled) 
     
     
         15 . The wind turbine rotor according to  claim 1 , wherein a first marker of said two or more markers comprise a first colour and a second marker of said two or more markers comprise a second colour and wherein said first colour is different from said second colour. 
     
     
         16 . The wind turbine rotor according to  claim 1 , wherein a first marker of said two or more markers is formed in a first shape and a second marker of said two or more markers is formed in a second shape and wherein said first shape is different from said second shape. 
     
     
         17 . The wind turbine rotor according to  claim 1 , wherein said at least one image capturing device comprises a charge-coupled device (CCD). 
     
     
         18 . The wind turbine rotor according to  claim 1 , wherein said rotor further comprises light reflecting means arranged between said image capturing device and at least one of said markers. 
     
     
         19 . (canceled) 
     
     
         20 . The wind turbine rotor according to  claim 1 , wherein said wind turbine rotor further comprises an illumination device for illuminating at least one of said markers. 
     
     
         21 . (canceled) 
     
     
         22 . The wind turbine rotor according to  claim 1 , wherein said wind turbine rotor further comprise a computing unit for establishing blade deformation values on the basis of an output from said image capturing device. 
     
     
         23 . The wind turbine rotor according to  claim 1 , wherein said image capturing device and at least one of said two or more markers are spaced apart by at least 10% of a total longitudinal length of said blade. 
     
     
         24 . The wind turbine rotor according to  claim 1 , wherein said image capturing device registers a position of said markers at a frequency enabling that edge-wise and/or flap-wise oscillations of said blade can be detected. 
     
     
         25 . (canceled) 
     
     
         26 . A wind turbine comprising a wind turbine rotor according to  claim 1 . 
     
     
         27 . The wind turbine according to  claim 26 , wherein said wind turbine comprises controlling means for controlling a pitch angle of said at least one wind turbine blade in relation to said deformation values and/or wherein said wind turbine comprises controlling means for controlling a rotational speed of said wind turbine rotor in relation to said deformation values and/or wherein said wind turbine comprises controlling means for controlling a rotational speed of said wind turbine rotor in relation to said deformation values. 
     
     
         28 . (canceled) 
     
     
         29 . Use of a wind turbine according to  claim 26  wherein said wind turbine is a pitch controlled wind turbine. 
     
     
         30 . The wind turbine rotor according to  claim 20  wherein a main part of the light emitted from said illumination device is non-visible, such as near-infrared or ultraviolet light.