{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
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  "description": "The present invention relates to a foreign object detecting method, and a device and system therefor. A method for detecting a foreign object in a wireless power transmitter according to an embodiment of the present invention may comprise the steps of: when an object placed in a charging area is…",
  "path": "/patents/1269812",
  "publishedAt": "2020-08-13T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02J50/60",
    "LG INNOTEK CO., LTD."
  ],
  "textContent": "The present invention relates to a foreign object detecting method, and a device and system therefor. A method for detecting a foreign object in a wireless power transmitter according to an embodiment of the present invention may comprise the steps of: when an object placed in a charging area is sensed, measuring quality factor values within an operating frequency band to find a measured peak frequency at which the maximum quality factor value is measured; storing the measured peak frequency and the measured quality factor value corresponding to the measured peak frequency; transmitting information on the type of transmitter to an identified wireless power receiver; receiving a reference quality factor value and a reference peak frequency corresponding to the type of transmitter; calculating a measured inductance by using the measured peak frequency; calculating a reference inductance by using the reference peak frequency; and detecting a foreign object by using at least one of the reference quality factor value, the reference peak frequency, and the reference inductance.",
  "title": "FOREIGN OBJECT DETECTING METHOD FOR WIRELESS CHARGING AND DEVICE THEREFOR"
}