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

Claim 16:
17. A wind turbine blade extending along a longitudinal axis from a root to a tip, the wind turbine blade comprising a root region, an airfoil region with the tip, the wind turbine blade comprising a pressure side, a suction side and a chord line extending between a leading edge and a trailing edge,, the wind turbine blade comprising a first acoustical transducer fastened to a first area of a surface of a structure of the wind turbine blade, and wherein the first acoustical transducer is configured to, while the wind turbine blade being attached to a hub of a wind turbine and the wind turbine is operating:
emit a first primary acoustic signal through the surface of the structure and into the structure; and
receive a first secondary acoustic signal indicative of an echo of the first primary acoustic signal.