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:
Mar. 19, 2019
Filed:
Aug. 04, 2016
Applicant:
The Boeing Company, Chicago, IL (US);
Inventors:
Bruno Zamorano Senderos, Huntsville, AL (US);
Daniel E. Sievers, Owens Cross Roads, AL (US);
Assignee:
the boeing company, Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 29/22 (2006.01); G01N 29/48 (2006.01); G01N 29/50 (2006.01);
U.S. Cl.
CPC ...
G01N 29/48 (2013.01); G01N 29/223 (2013.01); G01N 29/50 (2013.01); G01N 2291/0231 (2013.01); G01N 2291/0289 (2013.01); G01N 2291/0427 (2013.01); G01N 2291/106 (2013.01); G01N 2291/2694 (2013.01);
Abstract
Disclosed are methods and systems to nondestructively detect cracks at or near a countersink of a fastener, such as a rivet, in a thin walled structure using Lamb waves. Generation and detection of Lamb waves at symmetric locations relative to the fastener provides signals used to calculate a symmetry parameter. The symmetry parameter represents a comparison of the relative amplitudes of the detected Lamb wave signals and provides a simple indication of whether a crack exists.