Patent ID: 11888331
Assignee: SPARK CONNECTED LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 23:
24. A wireless power transmitter comprising:
a transmitting coil configured to wirelessly transmit power via a magnetic field towards a wireless power transmission space;
a ferrite core;
a housing disposed between the transmitting coil and the wireless power transmission space, wherein the ferrite core and the transmitting coil are disposed in the housing;
a sensor comprising differential pizza-slice-type coils with a first pizza-slice-type element and a second pizza-slice-type element, wherein the first pizza-slice-type element is disposed along a first axis of the wireless power transmitter and configured to detect motion along the first axis by a wireless power receiver comprising the receiving coil, and wherein the second pizza-slice-type element is disposed along a second axis of the wireless power transmitter and configured to detect motion along the second axis by the wireless power receiver, the second axis being different than the first axis; and
a controller configured to:
measure, via the sensor, the magnetic field in the wireless power transmission space during a first time and generate a first measurement,
measure, via the sensor, the magnetic field in the wireless power transmission space during a second time and generate a second measurement, the second time being after the first time, and
when a magnitude of a difference between the first measurement and the second measurement is higher than a predetermined threshold, determine a movement or a position of the wireless power receiver in the wireless power transmission space.