发明名称 |
METHODS AND APPARATUS FOR IMPLEMENTING PRESENCE AND USAGE PATTERN DETECTION IN WIRELESS CHARGING APPLICATIONS |
摘要 |
An apparatus for wirelessly transferring charging power is provided. The apparatus comprises a coupler configured to generate a wireless field when driven with a time-varying current. The apparatus comprises a measurement circuit configured to determine a parasitic capacitance between the coupler and ground while the coupler generates the wireless field. The apparatus comprises a controller circuit configured to determine a presence of a foreign object in response to the determined parasitic capacitance satisfying a detection criteria. The detection criteria may comprises a time-varying pattern of the determined parasitic capacitance predetermined to correspond to presence of a presence of the foreign object. The detection criteria may also comprises a threshold change in the determined parasitic capacitance predetermined to correspond to presence of a presence of the foreign object. |
申请公布号 |
WO2016164478(A1) |
申请公布日期 |
2016.10.13 |
申请号 |
WO2016US26243 |
申请日期 |
2016.04.06 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
GOVINDARAJ, Arvind;VON NOVAK, III, William Henry;CHI, Mei-Li |
分类号 |
H02J50/60;H04B5/00 |
主分类号 |
H02J50/60 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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