Patent ID: 11870275
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 15:
16. The method according to claim 15, wherein the determining, by the determining module based on the frequency-adjusted first signal and a pre-stored fourth signal, whether there is a metal foreign matter in an area of the target coil comprises:
when a difference between a frequency of the frequency-adjusted first signal and a frequency of the fourth signal is less than a second specified value, determining, by the determining module, that there is no metal foreign matter in the area of the target coil; or
when a difference between a frequency of the frequency-adjusted first signal and a frequency of the fourth signal is greater than or equal to the second specified value, determining, by the determining module, that there is a metal foreign matter in the area of the target coil.