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:
Dec. 08, 2020
Filed:
Sep. 08, 2017
Applicant:
Ratier-figeac Sas, Figeac, FR;
Inventors:
Abdellah El Haloui, Figeac, FR;
Bruno Petellaz, Beduer, FR;
Assignee:
RATIER-FIGEAC SAS, Figeac, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B64D 45/00 (2006.01); G07C 5/00 (2006.01); G07C 5/08 (2006.01); G01H 3/08 (2006.01); G01H 1/06 (2006.01); G01M 5/00 (2006.01); G01H 1/00 (2006.01); B64F 5/60 (2017.01); G01H 3/06 (2006.01); B64C 11/00 (2006.01); B64D 47/00 (2006.01);
U.S. Cl.
CPC ...
B64D 45/00 (2013.01); B64F 5/60 (2017.01); G01H 1/003 (2013.01); G01H 3/06 (2013.01); G01H 3/08 (2013.01); G01M 5/0016 (2013.01); G01M 5/0066 (2013.01); G07C 5/006 (2013.01); G07C 5/0808 (2013.01); B64C 11/00 (2013.01); B64D 47/00 (2013.01); B64D 2045/0085 (2013.01);
Abstract
A method for monitoring the health of propellers in an aircraft is provided. The method includes receiving pressure waves generated by at least one rotating propeller and analysing data corresponding to the received pressure waves to detect tonal noise which is within a selected frequency range. If tonal noise at harmonics of the propeller rotational frequency within the selected frequency range is detected within the selected frequency range, it is established that the health of at least one propeller may be impaired and an alert is created for inspection and maintenance to take place.