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Morgan Nilsen

Universitetslektor

biträdande

Magister i mekatronik

Staff member at Division of Production Systems.


Publications


Detecting beam offsets in laser welding of closed-square-butt joints by wavelet analysis of an optical process signal

Published

Detecting beam offsets in laser welding of closed-square-butt joints by wavelet analysis of an optical process signal

Robotized laser beam welding of closed-square-butt joints is sensitive to the positioning of the laser beam with respect to the joint since even a...

Vision based beam offset detection in laser stake welding of T-joints using a neural network

Published

Vision based beam offset detection in laser stake welding of T-joints using a neural network

This paper presents an experimental study where a vision camera integrates coaxially into a laser beam welding tool to monitor beam deviations (bea...

Monitoring and control of laser beam butt joint welding

Published

Monitoring and control of laser beam butt joint welding

Laser beam welding is one important technology in automated production. It has several advantages, such as the ability to produce deep and narrow...

Adaptive control of the filler wire rate during laser beam welding of squared butt joints with varying gap width

Published

Adaptive control of the filler wire rate during laser beam welding of squared butt joints with varying gap width

Adding filler wire control to autogenous laser beam welding of squared butt joints offers a means to widen up the tight fit-up tolerances associate...

A study on change point detection methods applied to beam offset detection in laser welding

Published

A study on change point detection methods applied to beam offset detection in laser welding

This paper presents an experimental study where a photodiode integrated into a laser beam welding tool is used to monitor laser beam spot deviation...

Robust vision-based joint tracking for laser welding of curved closed-square-butt joints

Published

Robust vision-based joint tracking for laser welding of curved closed-square-butt joints

Robotized laser beam welding of closed-square-butt joints is sensitive to how the focused laser beam is positioned in relation to the joint, and...

Beam offset detection in laser stake welding of tee joints based on photodetector sensing

Published

Beam offset detection in laser stake welding of tee joints based on photodetector sensing

This paper presents an experimental study where a photodetector is used in a laser beam welding tool to monitor beam deviations (beam offsets) in...

In-process Monitoring and Control of Robotized Laser Beam Welding of Closed Square Butt Joints

Published

In-process Monitoring and Control of Robotized Laser Beam Welding of Closed Square Butt Joints

In robotized laser welding of technical zero gap closed square butt joints it is critical to position the laser beam correct with regardsto the...

Optical detection of joint position in zero gap laser beam welding

Published

Optical detection of joint position in zero gap laser beam welding

This thesis presents an experimental study on how to track zero gaps between metal sheets to be joined by laser beam butt welding. Automated laser...

Vision and spectroscopic sensing for joint tracing in narrow gap laser butt welding

Published

Vision and spectroscopic sensing for joint tracing in narrow gap laser butt welding

The automated laser beam butt welding process is sensitive to positioning the laser beam with respect to the joint because a small offset may resul...

Monitoring of Varying Joint Gap Width During Laser Beam Welding by a Dual Vision and Spectroscopic Sensing System

Published

Monitoring of Varying Joint Gap Width During Laser Beam Welding by a Dual Vision and Spectroscopic Sensing System

A vision and spectroscopic system for estimation of the joint gap width in autogenous laser beam butt welding is presented. Variations in joint gap...

Joint tracking in zero gap laser beam welding using a vision sensor

Published

Joint tracking in zero gap laser beam welding using a vision sensor

The paper describes a robust vision sensor system that can find very narrow gaps between metal sheets to be butt welded together. The use of...

Evaluation of non-contact methods for joint tracking in a laser beam welding application

Published

Evaluation of non-contact methods for joint tracking in a laser beam welding application

The use of automated laser welding is a key enabler for resource efficient manufacturing in several industrial sectors. One disadvantage with laser...

Monitoring of laser beam welding by a non-intrusive optical sensor system using photodiodes

Published

Monitoring of laser beam welding by a non-intrusive optical sensor system using photodiodes

Monitoring and control of automated laser beam welding is necessary in order to increase weld quality and to optimise the process. This paper...

Vision systems for in‐process monitoring of laser beam welding

Published

Vision systems for in‐process monitoring of laser beam welding

This paper addresses the issue of evaluating an optical vision system to be integrated with a 1μm laser beam welding tool for process monitoring. T...

Optical Methods for In-Process Monitoring of Laser Beam Welding

Published

Optical Methods for In-Process Monitoring of Laser Beam Welding

This paper addresses the issue of evaluating and selecting optical sensors to be integrated with a 1μm laser beam welding system. The method used f...