US 10,892,652 B2
Adaptive ping method for wireless charging system with wide charge distance
Wen Cai, Plano, TX (US); and Francois Ricodeau, Dallas, TX (US)
Assigned to SEMTECH CORPORATION, Camarillo, CA (US)
Filed by Semtech Corporation, Camarillo, CA (US)
Filed on Dec. 12, 2018, as Appl. No. 16/217,812.
Prior Publication US 2020/0195064 A1, Jun. 18, 2020
Int. Cl. H02J 50/90 (2016.01); H02J 50/12 (2016.01); G01S 13/90 (2006.01); G01S 15/08 (2006.01); G01S 17/08 (2006.01)
CPC H02J 50/90 (2016.02) [H02J 50/12 (2016.02); G01S 13/90 (2013.01); G01S 15/08 (2013.01); G01S 17/08 (2013.01)] 20 Claims
OG exemplary drawing
 
9. A system for controlling power delivery, comprising:
a distance measuring device;
a processor coupled to the distance measuring device and configured to actuate the distance measurement device;
the distance measurement device configured to measure a distance between a transmitter and a receiver and to transmit a data packet to the processor that contains a plurality of data fields that have a value that represents the distance;
the processor configured to determine whether the distance is less than a predetermined threshold and to generate an error signal when the distance is less than the predetermined threshold that causes the processor to prevent the transmitter from generating an electromagnetic field and avoid causing damage to the receiver; and
a ping signal generator configured to generate a ping signal having a ping signal strength as a function of the distance and the transmitter configured to generate the electromagnetic field as a function of the ping signal strength when the distance is not less than the predetermined threshold.