Patent ID: 11939956
Assignee: LM WIND POWER A/S
Field: Measurement (Instruments)
Classification: CPC F  G  Y | IPC F  G

Claim 14:
15. The method according to claim 1, comprising:
fastening a plurality of acoustical transducers to the surface of the structure, including fastening the first acoustical transducer to the first area of the surface of the structure and a second acoustical transducer to a second area of the surface of the structure;
while operating the wind turbine emitting by the plurality of acoustical transducers primary acoustic signals including the first primary acoustic signal and a second primary acoustic signal through the surface of the structure and into the structure;
while operating the wind turbine receiving by the plurality of acoustical transducers secondary acoustic signals including the first secondary acoustic signal and a second secondary acoustic signal indicative of echoes of the primary acoustic signals;
analysing the secondary acoustic signals to obtain signal parameters;
evaluating presence of defects including the first defect and/or a second defect in the structure based on the signal parameters.