Terrestrial laser scanning used to detect asymmetries in boat hulls

Roca Pardiñas, Javier; López-Álvarez, Francisco; Ordóñez, Celestino; Menéndez, Agustín; Bernardo-Sánchez, Antonio

Abstract:

We describe a methodology for identifying asymmetries in boat hull sections reconstructed from point clouds captured using a terrestrial laser scanner (TLS). A surface was first fit to the point cloud using a nonparametric regression method that permitted the construction of a continuous smooth surface. Asymmetries in cross-sections of the surface were identified using a bootstrap resampling technique that took into account uncertainty in the coordinates of the scanned points. Each reconstructed section was analyzed to check, for a given level of significance, that it was within the confidence interval for the theoretical symmetrical section. The method was applied to the study of asymmetries in a medium-sized yacht. Identified were differences of up to 5 cm between the real and theoretical sections in some parts of the hull.

Year:

2012

Type of Publication:

Article

Keywords:

Clouds; Laser scanners; Reconstruction algorithms; Tolerancing; Optical engineering; Statistical analysis; Manufacturing

Journal:

Optical Engineering

Volume:

51

Number:

1

Pages:

013605

Month:

February

DOI:

http://dx.doi.org/10.1117/1.OE.51.1.013605