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US 8,475,363 B2Granted
Coil arrangement for guiding a magnetic element in a working space
AssigneeSiemens Aktiengesellschaft
InventorJohannes Reinschke
Life of this patent
Estimating the term…
Abstract
A coil arrangement for contact-free guidance of a magnetic element such as an endoscopy capsule, has a number of individual coils arranged in pairs by which the components of a guidance field are generated. By arranging the individual coils to include coils corresponding to blades at an exterior of a cylindrical surface, the number of degrees of freedom required for guidance can be obtained with fewer individual coils and fewer power amplifiers to operate the coils.
Claims34
A coil arrangement comprising:
- multiple individual coils configured to generate a guide field in a workspace defined by a Cartesian coordinate system, said guide field being selected from the group consisting of a magnetic field formed by three individual field components respectively in the directions of said Cartesian coordinate system, and at least four independent gradient fields of a gradient matrix, said guide field being configured to guide a magnetic element therein in said workspace;
- said multiple independent coils comprising a plurality of first individual coils, a plurality of second individual coils, and a plurality of third individual coils;
- said plurality of first individual coils being arranged in series along a circumferential direction of a surface shell of an imaginary cylinder having a longitudinal cylinder axis extending along the Z-direction of said Cartesian coordinate system;
- said plurality of second individual coils being arranged at two opposite ends of said cylinder;
- and
- said plurality of third individual coils each having a cross-section with the cross-sections of the respective third individual coils being oriented as blades perpendicular to said longitudinal cylinder axis and projecting from an exterior of said imaginary cylinder.
3 more elements
An endoscopy system comprising:
- an endoscopy capsule having a magnetic dipole moment;
- multiple individual coils configured to generate a guide field in a workspace defined by a Cartesian coordinate system, said guide field being selected from the group consisting of a magnetic field formed by three individual field components respectively in the directions of said Cartesian coordinate system, and at least four independent gradient fields of a gradient matrix, said guide field being configured to interact with said magnetic dipole moment to guide said endoscopy capsule therein in said workspace;
- said multiple independent coils comprising a plurality of first individual coils, a plurality of second individual coils, and a plurality of third individual coils;
- said plurality of first individual coils being arranged in series along a circumferential direction of a surface shell of an imaginary cylinder having a longitudinal cylinder axis extending along the Z-direction of said Cartesian coordinate system;
- said plurality of second individual coils being arranged at two opposite ends of said cylinder;
- and
- said plurality of third individual coils each having a cross-section with the cross-sections of the respective third individual coils being oriented as blades perpendicular to said longitudinal cylinder axis and projecting from an exterior of said imaginary cylinder.
4 more elements
Dependencies are inferred from the claim text.