Patent ID: 11870274
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. The wireless charging device according to claim 12, wherein the second charging unit further comprises a plurality of second demodulation circuits that are in a one-to-one correspondence with the plurality of second transmitter coils, one end of each of the second demodulation circuits is connected to the first controller, and the other end of each of the second demodulation circuits is connected to the corresponding second transmitter coil;
a second target transmitter coil is further to receive a second feedback signal sent by the to-be-charged device for the second induction signal and send the second feedback signal to a corresponding second demodulation circuit, wherein the second feedback signal carries the second electromagnetic coupling strength, the second target transmitter coil detects the to-be-charged device through induction in the second transmitter coil group, and the second transmitter coil group comprises at least one second target transmitter coil; and
the second demodulation circuit connected to the second target transmitter coil is to demodulate the second feedback signal to obtain the second electromagnetic coupling strength and send the second electromagnetic coupling strength to the first controller.