Patent ID: 9528493
Filing Date: 2016-12-27
CPC Classification: F03D,F05B,Y02E

Claim Text:
1. Apparatus comprising: a wind turbine having at least one rotor blade; and at least one acoustic sensor remotely located from the at least one rotor blade, said at least one acoustic sensor focused to monitor a portion of a blade path comprising a circumferential sector on a radially outer portion of the blade path swept by said at least one rotor blade to detect an aerodynamic condition affecting the blade in the portion of the blade path being monitored, wherein said at least one acoustic sensor has a listening-field configured to listen to sounds emanating from the circumferential sector over the radially outer portion of the blade path being monitored, while attenuating sounds emanating outside the circumferential sector on the radially outer portion of the blade path being monitored.