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

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-geometr...

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Bibliographic Details
Published in:International journal of microwave and wireless technologies 2013-06, Vol.5 (3), p.409-417
Main Authors: Schrattenecker, Jochen O., Haderer, Andreas, Reinthaler, Günther, Stelzer, Andreas
Format: Article
Language:English
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Research Papers
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Summary: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.
ISSN:1759-0787
1759-0795
DOI:10.1017/S1759078713000329