Wireless power supply apparatus, power transmission coil unit, and wireless power supply system
AssigneeOlympus Corporation
InventorsHiroshi Iwaisako, Ken Sato, Naohito Doi, Youhei Sakai
Life of this patent
Estimating the term…
Abstract
A wireless power supply apparatus for a capsule-type endoscope has three sets of coils that generate a magnetic field in directions that are orthogonal to each other, a gravity sensor that detects a gravitational direction, a coil selection section that selects a coil that generates a magnetic field in a gravitational direction that is detected by the gravity sensor, and a drive section that applies a current to the coil that the coil selection section selects.
Claims15
A wireless power supply apparatus that wirelessly supplies power to a capsule-type medical device that is introduced into a body of a subject, wherein:
- the capsule-type medical device has a power receiving coil that receives an electric power by means of a change in a magnetic field;
- the wireless power supply apparatus comprising:
- a power transmission coil unit that is arranged on the subject, and that has three sets of power transmission coils that generate the magnetic field in directions that are orthogonal to each other,
- a drive section that applies an electric current to at least one set of the power transmission coils, and
- a coil selection section that selects the power transmission coils to apply the electric current to in order to cause the power receiving coil of the capsule-type medical device to generate an induced voltage.
A power transmission coil unit of a wireless power supply apparatus that wirelessly supplies power to a capsule-type medical device that is introduced into a body of a subject, wherein:
- the capsule-type medical device has a power receiving coil that receives an electric power by means of a change in a magnetic field, and has a structure that enables the capsule-type medical device to float with a longitudinal direction thereof being perpendicular to a surface of a liquid that is retained inside a stomach of the subject;
- the power transmission coil unit comprises three sets of power transmission coils that generate the magnetic field in directions that are orthogonal to each other, and a gravity sensor that detects a gravitational direction;
- and
- the power transmission coil unit is arranged in clothing that the subject wears.
A wireless power supply system comprising a capsule-type medical device that is introduced into a body of a subject, and a wireless power supply apparatus that wirelessly supplies power to the capsule-type medical device, wherein:
- the capsule-type medical device is a capsule-type endoscope that has:
- a power receiving coil that receives an electric power by means of a change in a magnetic field in a parallel direction to a longitudinal direction thereof, and
- an image pickup section that is arranged at an end portion in the longitudinal direction;
- and
- the wireless power supply apparatus comprises:
- a power transmission coil unit that is arranged on the subject, and that has three sets of power transmission coils that generate the magnetic field in directions that are orthogonal to each other,
- a drive section that applies an electric current to at least one set of the power transmission coils, and
- a coil selection section that selects the power transmission coils to apply the electric current to in order to generate a magnetic field in a longitudinal direction of the capsule-type medical device.
Dependencies are inferred from the claim text.