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On the Industrial Applications of Moiré and Fringe Projection Techniques
Author(s) -
HerediaOrtiz M.,
Patterson E. A.
Publication year - 2003
Publication title -
strain
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.477
H-Index - 47
eISSN - 1475-1305
pISSN - 0039-2103
DOI - 10.1046/j.1475-1305.2003.00072.x
Subject(s) - aerospace , moiré pattern , robustness (evolution) , structured light 3d scanner , automated x ray inspection , projection (relational algebra) , computer science , engineering , computer vision , artificial intelligence , image processing , aerospace engineering , biochemistry , chemistry , scanner , algorithm , image (mathematics) , gene
This paper describes a set of tools and procedures based on the moiré and fringe projection techniques, which were developed to suit the requirements of real industrial situations. Particular attention was paid to flexibility, robustness and reliability, ease of use and calibration, and cost efficiency. Three case studies are being discussed in the paper. The first case describes a prototype shadow moiré instrument, which was developed for the detection of surface defects such as barely visible impact damage or corrosion inside lap‐joints, during maintenance inspections of aeronautical structures. The second case presents a portable instrument based on the fringe projection technique for the automatic, full‐field measurement of the shape and deformation of an arbitrary object. The system has applications ranging from deformation measurement of bioprostheses to correction of shape effects in the photoelastic analysis of complex aerospace components. Finally, a portable instrument was developed for the measurement of the location, orientation, shape and deformation of an arbitrary object, by combining the fringe projection technique with the laser spot technique for distance measurement. The system was used to assist in the integration of non‐destructive evaluation techniques throughout the life cycle of an aircraft.