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Title: Monitoring of CO2 Laser Cutting of Thick Steel Plates by Means of a NIR Camera Based System
Authors: Fallahi Sichani, E.
De Keuster, J.
Kruth, Jean-Pierre
Duflou, Joost #
Issue Date: 2009
Publisher: Trans Tech Publications
Host Document: Key Engineering Materials vol:410-411 pages:207-216
Conference: SheMet edition:2009 location:Birmingham, UK date:6-8 April 2009
Article number: 0-87849-336-0
Abstract: An optical monitoring system has been developed by the authors aiming at real-time
monitoring of laser cutting of thick plates of mild steel. This optical system uses photodiodes and a
NIR camera as sensors. The concepts and results of the photodiode-based monitoring system have
already been reported [1,2]. This paper is dedicated to the development of the optical set-up for
camera-based monitoring of the laser cutting process. Firstly, some general aspects concerning the
sensing principles and the conceptual design of the physical layout of the camera set-up are
discussed. Based on a detailed optical analysis of the proposed conceptual design, some relevant
information with regard to the selection of the camera type was obtained. Aspects related to the
acquisition and analysis of the images, are highlighted. The initially developed camera set-up is
presented. Firstly the design of the corresponding optical path is discussed in detail, including the
results of the performed optical analysis. Next the results of the verification tests, performed on this
physical set-up, are presented. Finally some preliminary results are included, proving the superior
capability of the NIR camera compared to the photodiode-based solution for monitoring purposes.
ISSN: 1013-9826
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Production Engineering, Machine Design and Automation (PMA) Section
Centre for Industrial Management / Traffic & Infrastructure
# (joint) last author

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