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US 10,256,673 B2Granted
Detection device, power reception device, power transmission device and non-contact power supply system
AssigneeSony Corporation
InventorsTakashi Miyamoto, Hiroaki Nakano, Tomomichi Murakami
Life of this patent
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Abstract
A detection device, including: one or a plurality of magnetic coupling elements configured to have one or a plurality of coils; and a detection unit that measures or calculates an effective resistance values of the magnetic coupling elements or an effective resistance value of a circuit including at least the magnetic coupling elements and determines a presence or absence of a foreign substance based on a change in the effective resistance value.
Claims23
A power transmitting device comprising:
- a resonance circuit that includes a power transmitting coil;
- and
- circuitry configured to measure a resistance value of the resonance circuit and to compare the measured resistance value with a threshold resistance value to determine whether or not a foreign substance is in a vicinity of the power transmitting coil,
- wherein the threshold resistance value is set in a case of only the power transmitting device.
1 more element
A power transmitting system comprising:
- a power receiving device including
- a power receiving coil configured to receive power from a power transmitting coil,
- a power transmitting device including
- a resonance circuit that includes the power transmitting coil, and
- circuitry configured to measure a resistance value of the resonance circuit and to compare the measured resistance value with a threshold resistance value to determine whether or not a foreign substance is in a vicinity of the power transmitting coil,
- wherein the threshold resistance value is set in a case of only the power transmitting device.
3 more elements
Dependencies are inferred from the claim text.