Three-dimensional Position Estimation of Dielectric Objects using UWB-Pulses and Cross-Correlation Methods

Inhalt:
This paper presents an approach for the rapid determination and localization of dielectric anomalies like foreign bodies in material layers. Ultra-wideband pulses with a duration of approximately 400ps and a cross-correlation algorithm are applied. Accurate position determination in a plane is possible without any calibration. If a volume is to be observed, an amplitude calibration has to be carried out. An experimental measurement set up is described. An accuracy (rms) of 2mm in xdirection, 5mm in y-direction and 25mm in z-direction is experimentally achieved for dielectric obstacles with diameters between 5-12mm and relative permittivities between 2-10.