The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 26, 2019
Filed:
Dec. 16, 2015
Vestas Wind Systems A/s, Aarhus N, DK;
Ib Svend Olesen, Randers, DK;
VESTAS WIND SYSTEMS A/S, Aarhus N, DK;
Abstract
A method of determining a twist angle of a wind turbine blade, the method comprising providing first and second transmitters on the wind turbine blade, the first transmitter being spaced apart from a receiver by a first distance, and the second transmitter being spaced 5 apart from the receiver by a second distance, the transmitters being arranged such that twisting of the blade causes an increase in one of the first or second distances and a decrease in the other of the first or second distances; transmitting a blinking signal from each of the first and second transmitters towards the receiver, the blinking signals having a blinking frequency; varying the blinking frequency of the blinking signals; monitoring the 10 amplitude of the blinking signal received by the receiver as the blinking frequency is varied; determining a particular blinking frequency that results in an increased amplitude of the blinking signal received by the receiver; and using the determined particular blinking frequency to calculate the blade twist angle.