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:
May. 14, 1996
Filed:
Nov. 23, 1993
Applicant:
Inventor:
Shahamat Manzouri, Brough, GB;
Assignee:
British Aerospace PLC, Farnborough, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01H / ;
U.S. Cl.
CPC ...
73655 ; 356374 ; 73579 ;
Abstract
Apparatus for detecting at least one of the amplitude, frequency and modes of vibration of a panel is described. Detection is achieved using Moire fringes by employing two diffraction gratings (33 and 38) through the first of which light is projected on to the panel. An array of photodiodes (40) is positioned behind the second diffraction grating (38) which receives light reflected from the panel. Signals from the photodiodes are analyzed in conventional ways to produce the required amplitude, frequency and mode information.