| 摘要 |
The invention relates to a wind turbine having at least one rotor blade comprising: a transmitter arranged to transmit an electro-magnetic (EM) radiation signal having spatially dependent characteristics;a receiver arranged to receive the EM-radiation signal, the receiver being located on the blade at a location outboard with respect to the transmitter and being arranged such that a deflection of the rotor blade results in a displacement of the receiver relative to the transmitter; and a processor arranged to calculate a deflection of the rotor blade based upon spatially dependent characteristics of the received EM-radiation signal. The invention also relates to a method of determining deflection of a blade of a wind turbine rotor during rotation of the rotor, the method comprising: transmitting from a first position an electro-magnetic (EM) radiation signal having spatially dependent characteristics; receiving the EM-radiation signal at a second position, the second position being located on the blade at a location outboard with respect to the first position, and being arranged such that a deflection of the rotor blade results in a displacement of the second position relative to the first position; and calculating the deflection of the blade based upon the spatially dependent characteristics of the received EM-radiation signal. |
