Many devices for the smart mobility make use of low frequency magnetic sensors to determine the alignment of the device with respect to the earth field. In highly manned areas, the presence of meaningful disturbance fields must be expected and as much as possible counteracted. Typical sources of disturbances are metallic parts or AC power lines, possibly carrying spurious current harmonics induced by rectifiers. Numerical analysis is hard also when the environment is known since the numerical computation requires meshing of complex 3D structures and non-linear problems resolution. In this paper, a numerical model able to treat, in a fast but accurate way, such complex 3D nonlinear problems is applied to estimate the impact of disturbing fields on the magnetic measurement of the device alignment.
A method to compute the impact of iron parts and external fields on the low frequency magnetic sensors in smart devices
Chiariello, Andrea Gaetano;Formisano, Alessandro;Martone, Raffaele
2017
Abstract
Many devices for the smart mobility make use of low frequency magnetic sensors to determine the alignment of the device with respect to the earth field. In highly manned areas, the presence of meaningful disturbance fields must be expected and as much as possible counteracted. Typical sources of disturbances are metallic parts or AC power lines, possibly carrying spurious current harmonics induced by rectifiers. Numerical analysis is hard also when the environment is known since the numerical computation requires meshing of complex 3D structures and non-linear problems resolution. In this paper, a numerical model able to treat, in a fast but accurate way, such complex 3D nonlinear problems is applied to estimate the impact of disturbing fields on the magnetic measurement of the device alignment.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
