GTD-Based 2D Scattering Model for Polarimetric Position Estimation of Lap Joints

Recent studies have shown that position estimation of metal plate edges by means of polarimetric effects is a promising technique in harsh industrial environments. Potential practical applications in industry include position estimation of two metal plates in a lap joint arrangement. However, applying the commonly used point target model to determine the position of a lap joint results in large estimation errors caused by model inaccuracies. We propose a new two-dimensional model of a perfectly electrically conducting lap joint building upon the geometrical theory of diffraction (GTD). For verification, we present a comparison of the estimation results using a computationally intensive method-of-moment-based model as reference.