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Proceedings Paper

3D laser scanner system based on a galvanometer scan head for high temperature applications
Author(s): Torunn Hegna; Hans Pettersson; Karl Magnus Laundal; Katarina Grujic
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Paper Abstract

This paper deals with a 3-D scanning system based on relatively inexpensive, off-the-shelf products. Although there exist many techniques for obtaining information about object position, size and form, it is still possible to find specific applications where none of the conventional methods seem to satisfy the requirements. Such applications are encountered in challenging environments where one has to simultaneously gather information quickly, with high accuracy and without interaction with the object of interest. The instruments also need to be kept simple, cost effective and robust. In this paper, we propose and investigate a system that angles a beam from a laser rangefinder along the object of interest, in order to determine the object's geometrical properties. The beam is angled by means of a galvanometer scan head. The scanned pattern is conditioned by the assumed object form and position. The pattern is adjusted during the measurement in an appropriate way so that the scanning time is minimized. The object form assumed is a series of concentric pipes of relatively small and varying diameter (10 - 50 cm). The system is designed to determine the position of the joints and the diameters of the pipe sections. The object can be at temperatures ranging from subzero to over 1300 °C. This article specifies the characteristics of the system and discusses the various parameters limiting the system performance. Although the system components were not optimal with respect to the measurement requirements, the system's performance is designated as satisfactory. The system can easily be improved by exchanging the components with more suitable units.

Paper Details

Date Published: 27 May 2011
PDF: 9 pages
Proc. SPIE 8082, Optical Measurement Systems for Industrial Inspection VII, 80823Z (27 May 2011);
Show Author Affiliations
Torunn Hegna, Teknova AS (Norway)
Hans Pettersson, Teknova AS (Norway)
Karl Magnus Laundal, Teknova AS (Norway)
Katarina Grujic, Teknova AS (Norway)

Published in SPIE Proceedings Vol. 8082:
Optical Measurement Systems for Industrial Inspection VII
Peter H. Lehmann; Wolfgang Osten; Kay Gastinger, Editor(s)

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