Capsule-type medical device, power supply apparatus, and power supply system
AssigneeOlympus Corporation
InventorsKen SATO, Hiroshi IWAISAKO, Hideharu MIYAHARA, Naoki YOSHIDA
Life of this patent
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Abstract
Provided is a capsule-type endoscope that has a power receiving coil that wirelessly receives an electric power from outside a body of an individual to be examined, a processing circuit that performs predetermined processing, and an adjusting reactance section that is capable of adjusting a reactance that is connected to the power receiving coil.
Claims15
A capsule-type medical device that receives an electric power from outside a body of an individual to be examined and performs predetermined processing inside the body, comprising:
- a processing circuit that performs the predetermined processing inside the body;
- and
- a power receiving circuit that has a power receiving coil that wirelessly receives an electric power from outside the body, a power receiving resonance capacitor, and an adjusting reactance section that is capable of adjusting a reactance that is connected to the power receiving coil and the power receiving resonance capacitor;
- wherein an impedance of the processing circuit and an impedance of the power receiving circuit are matched by adjusting a reactance of the adjusting reactance section.
A power supply apparatus that wirelessly supplies an electric power from outside a body of an individual to be examined to a capsule-type medical device that performs predetermined processing inside the body of the individual to be examined, comprising:
- a power transmission coil that is disposed outside the body of the individual to be examined and that generates an AC magnetic field;
- a power transmitting resonance capacitor that is connected in series to the power transmission coil;
- and
- a power transmission coil drive section that drives the power transmission coil;
- wherein upon detecting a termination of a resonant state of the AC magnetic field, the power transmission coil drive section performs control that restores the AC magnetic field to a resonant state.
A power supply system comprising a capsule-type medical device and a power supply apparatus, in which:
- the capsule-type medical device wirelessly receives an electric power from outside a body of an individual to be examined and performs predetermined processing inside the body, and the power supply apparatus wirelessly supplies an electric power from outside the body of the individual to be examined to the capsule-type medical device that is inside the body, wherein:
- the capsule-type medical device comprises:
- a processing circuit that performs the predetermined processing inside the body, and
- a power receiving circuit that is a resonant circuit with a predetermined resonance frequency that has a power receiving coil that receives an electric power from outside the body, a power receiving resonance capacitor, and an adjusting reactance section that is capable of adjusting a reactance that is connected to the power receiving coil and the power receiving resonance capacitor,
- wherein an impedance of the processing circuit and an impedance of the power receiving circuit are matched by adjusting a reactance of the adjusting reactance section;
- and
- the power supply apparatus comprises:
- a power transmission coil that generates an AC magnetic field,
- a power transmitting resonance capacitor that is connected in series to the power transmission coil, and
- a power transmission coil drive section that drives the power transmission coil,
- wherein upon detecting a termination of a resonant state of the AC magnetic field by an abrupt fall in a driving current or an abrupt rise in a driving voltage, the power transmission coil drive section performs control that restores the AC magnetic field to a resonant state.
Dependencies are inferred from the claim text.