{
  "$type": "site.standard.document",
  "description": "An apparatus and a method for detecting a metal foreign matter in a wireless charging system, and a device are provided. The apparatus includes a phase-lock control module, an excitation module, a resonance module, a signal collection module, and a determining module. The phase-lock control module…",
  "path": "/patents/1424635",
  "publishedAt": "2023-10-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L53/124",
    "HUAWEI TECH CO LTD [CN]"
  ],
  "textContent": "An apparatus and a method for detecting a metal foreign matter in a wireless charging system, and a device are provided. The apparatus includes a phase-lock control module, an excitation module, a resonance module, a signal collection module, and a determining module. The phase-lock control module is configured to: adjust a frequency of a first signal based on a difference between a phase of the first signal that is output by the phase-lock control module and a phase of a third signal that is collected by the signal collection module, and output the first signal to the excitation module and the determining module, where a difference between a phase of the frequency-adjusted first signal and the phase of the third signal is less than a first specified value. The excitation module is configured to: generate a second signal based on the first signal, and output the second signal to the resonance module. The resonance module is configured to output the third signal to the signal collection module under excitation of the second signal by using a resonant circuit including a target coil and a target capacitor. The determining module is configured to determine, based on the signal that is output by the phase-lock control module and a pre-stored fourth signal, whether there is a metal foreign matter in an area of the target coil.",
  "title": "APPARATUS, DEVICE AND METHOD FOR DETECTING METAL FOREIGN MATTER IN WIRELESS CHARGING SYSTEM"
}