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Position estimation of lap joints for seam tracking applications at mm-wave frequencies

Published online by Cambridge University Press:  23 April 2013

Jochen O. Schrattenecker*
Affiliation:
Institute for Communications Engineering and RF-Systems, Altenberger Str. 69, A-4040 Linz, Austria. Phone : +43 732 2468 6390
Andreas Haderer
Affiliation:
Institute for Communications Engineering and RF-Systems, Altenberger Str. 69, A-4040 Linz, Austria. Phone : +43 732 2468 6390
Günther Reinthaler
Affiliation:
Fronius International GmbH, Günter Fronius Str. 1, A-4600 Wels-Thalheim, Austria
Andreas Stelzer
Affiliation:
Institute for Communications Engineering and RF-Systems, Altenberger Str. 69, A-4040 Linz, Austria. Phone : +43 732 2468 6390
*
Corresponding author: J. Schrattenecker Email: j.schrattenecker@nthfs.jku.at

Abstract

In this paper, we present the results of using a frequency-stepped continuous-wave radar system to estimate the position of overlapping and electrically good conductive plates. We especially focus on polarimetric scattering effects caused by the step of a lap joint, which is a common welding-geometry. To model the step's contribution to the overall scattered signal, we use a two-dimensional combined field integral equation (CFIE) approach. For demonstrating its practical applicability, the implemented scattering model is verified by measurements. To emphasize the improvements of position estimation by using a CFIE approach, the outcomes of the model are compared to a commonly used point scattering model. Finally, the numerical signal is utilized to precisely estimate the position of the lap joint.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2013 

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References

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