Patent ID: 11965480
Assignee: OCEAN UNIVERSITY OF CHINA
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 7:
8. The acoustic monitoring method for the health status of the offshore wind turbine and the ocean wave according to claim 7, wherein
a movement of the blade tip in a measurement zone is observed; corresponding distances from the blade tip to various positions of the tower and corresponding acoustic signals generated by the movement of the blade tip are acquired;
a distance is selected as a minimum safe distance from various distances;
an acoustic signal corresponding to the minimum safe distance is taken as a first warning acoustic value; the first acoustic emission apparatus detects a real-time acoustic signal generated when the blade tip moves to the measurement zone during the operation of the wind turbine;
an operational safety status of the wind turbine is monitored based on the real-time acoustic signal and the first warning acoustic value;
when the real-time acoustic signal is greater than the first warning acoustic value, a warning signal is sent to the remote control center and the execution device of the wind turbine;
when the real-time acoustic signal is less than or equal to the first warning acoustic value, the blade does not collide with the tower, hitting of an ocean wave on the pile foundation after breaking has a pre-determined effect on a load, and hitting of an ocean current has a pre-determined effect on the pile foundation.