Patent ID: 11891978
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 11:
12. A monitoring method for a wind turbine blade that comprises a blade body and a down conductor extending along a longitudinal direction of the blade body, comprising:
a step of detecting, by using at least a pair of magnetic field sensors disposed inside the blade body and in the wind turbine blade at opposite positions across the down conductor, a local magnetic field at each of the positions; and
a step of acquiring information about a lightning-struck position of the wind turbine blade, based on a detection signal of each of at least the pair of magnetic field sensors, wherein
at least the pair of magnetic field sensors comprises:
a first sensor disposed on a first axis passing through an installation position of the down conductor in a cross section intersecting the longitudinal direction; and

a second sensor disposed on a second axis passing through the installation position and being orthogonal to the first axis in the cross section.