The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 2024
Filed:
Jun. 27, 2022
Huawei Technologies Co., Ltd., Guangdong, CN;
Chunsen Tang, Chongqing, CN;
Zhihui Wang, Chongqing, CN;
Yaoyi Wang, Chongqing, CN;
Pengfei Bai, Chongqing, CN;
Zhenzhen Wang, Chongqing, CN;
Jiakai Cao, Chongqing, CN;
Wei Kuang, Chongqing, CN;
Zhixian Wu, Dongguan, CN;
HUAWEI TECHNOLOGIES CO., LTD., Guangdong, CN;
Abstract
This application provides a foreign object detection method and apparatus, and a wireless charging system. The foreign object detection apparatus includes a coil array and a foreign object detection circuit. The coil array includes at least one coil group, and each coil group includes four detection coils whose locations are symmetrical to each other. The foreign object detection circuit determine an abnormal-value threshold of each coil group based on induction signals of each coil group and that are obtained in a first time period, and detect, based on the abnormal-value threshold and the induction signals of each coil group, whether there is a foreign object; when it is determined that there is no foreign object, detect, based on the signal threshold of each coil group and induction signals that are of each coil group and that are obtained in a second time period, whether there is a foreign object.