RT Book, Section
T1 Detection of microbumps in aeronautic surfaces by means of an elastical Moire system
A1 Quiroga Mellado, Juan Antonio
A1 Martínez Antón, Juan Carlos
A1 Canabal Boutureira, Héctor
A1 Bernabeu Martínez, Eusebio
A1 Álvaro Labajo, M.
A1 Cortés Testillano, V.
AB We provide a simple solution for the particular problem of the in-service inspection of aeronautic surfaces in order to detect bumps that otherwise it is made visually and usually less reliably. Bumps and other surface defects can be a symptom of a more serious internal damage. We have extended the use of the well know shadow Moire technique to be implemented in convex curved surfaces. The use of flexible Ronchi grating allows its adaptation to a convex general surface. The effect is the contrast enhancement of only the small defects sweeping-off other misleading height profile fringes. The result obtained are quite satisfactory compared to the use of flat reference gratings. The experimental set- up consists of a plastic foil with a printed Ronchi grating stretched between three points which adapts to nay cylindrical or conical convex surface independently of the relative grating-surface orientation. Static quantification of defects profiles is also possible by means of with an attached CCD camera. Visual detectability of local surface structures lye in the range of approximately 30 micrometers in depth.
PB SPIE--The International Society for Optical Engineering.
SN 0-8194-4093-0
YR 2001
FD 2001
LK https://hdl.handle.net/20.500.14352/60786
UL https://hdl.handle.net/20.500.14352/60786
NO © 2001 SPIE--The International Society for Optical Engineering. Conference on Optical Measurement Systems for Industrial Inspection II: Application in Industrial Design (2ª. 2001. Múnich, Alemania)
DS Docta Complutense
RD 2 may 2024