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Assessing the Use of the "Light" Laser Scanners and the Monte Carlo Technique for the Geometric Documentation (5073)

George Pantazis and Konstantinos Nikolitsas (Greece)
Dr. George Pantazis
Assistant Professor
National Technical University of Athens
9 Herron Polytechniou
Zografos
15780
Greece
 
Corresponding author Dr. George Pantazis (email: gpanta[at]central.ntua.gr, tel.: + 30 2107722696)
 

[ abstract ] [ paper ] [ handouts ]

Published on the web 2011-02-10
Received 2010-11-22 / Accepted 2011-02-10
This paper is one of selection of papers published for the FIG Working Week 2011 in Marrakech, Morocco and has undergone the FIG Peer Review Process.

FIG Working Week 2011
ISBN 978-87-90907-92-1 ISSN 2307-4086
http://www.fig.net/resources/proceedings/fig_proceedings/fig2011/index.htm

Abstract

The modern constructions as well as many other industrial products have geometric defined surfaces according to their specifications. The check of these surfaces used to carried out by using the classic laser scanners, which unfortunately are very expensive heavy and complicated. A new generation of geodetic total stations have embodied a laser scanner. This function proved very convenient as it is easy to use on parallel with the classic survey measurements. The "light" laser scanners as they are called, they are realy light, cheaper than the classic laser scanners and they can replace them in many applications. In this paper a wholly procedure is presented, which leads to: The a-priori uncertainty estimation of the measured points by using the "light" laser scanners The selection of the proper total station and the appropriate scanning distance in relation to the desired uncertainty result. The determination of the scanning parameters such as the scanning step (horizontally and vertically) and consiquently of the maximum number of points to be measured as well as the a-priori standard error of a geometric surface adjustment. For this purpose the Monte Carlo technique and the least square method are combined. An application on a difficult surface (satellite antenna) of an elliptic paraboloid was carried out, where useful conclusions are come out. The new born "light" laser scanners proved to be adequate for the easier, quicker and cheaper documentation of geometric surfaces.
 
Keywords: Laser scanning; Engineering survey; total station; scannig; geometric surface; Monte Carlo technique; fitting

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