Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Inductive localization accuracy of a passive 3D coil in an Industry 4.0 environment
 Journal of sensors and sensor systems : JSSS 8 (2019), Nr.1, S.171183 ISSN: 21948771 ISSN: 2194878X 

 Englisch 
 Zeitschriftenaufsatz, Elektronische Publikation 
 Fraunhofer IIS () 
Abstract
In this paper a localization system of a passive 3D coil is proposed and signal uncertainties due to the 3D coil's arbitrary orientation are analyzed. The 3D coil is excited by an alternating primary magnetic field. Geometrically distributed pickup coils measure the 3D coil's secondary field. By means of a simulated lookup table that assigns expected voltages from the pickup coils to the positions of the 3D coil, the position of the 3D coil is deduced by a leastsquares approach. A basic assumption is that the secondary field is invariant to the orientation of the 3D coil. This allows a reduction of the computational effort for the lookup table generation and the table search during the localization phase since for each position the field distribution for only one orientation has to be calculated. However, the assumption of invariance to rotation is only valid for a dipole model. In this paper we investigate the localization error introduced by this assumption when using 3D coils with a geometric extent in an inhomogeneous primary field. Optimized localization methods that decrease the statistical error are proposed. The theoretical results are verified with measurements conducted on a laboratory system.