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US 2019/0170840 A1Published application
Device, system and method for obtaining a magnetic measurement with permanent magnets
AssigneeAspect Imaging Ltd.
InventorsUri RAPOPORT, Yair GOLDFARB, Yoram COHEN
Life of this patent
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Abstract
A magnetic field device, with a first magnet, a first ferromagnetic element positioned adjacent to the first magnet, a second magnet, a second ferromagnetic element positioned adjacent to the second magnet and relative to the first ferromagnetic element to create a gap between the first ferromagnetic element and the second ferromagnetic element, and a third magnet positioned between the first ferromagnetic element and the second ferromagnetic element and within the gap.
Claims19
A magnetic field device, comprising:
- a first magnet;
- a first ferromagnetic element positioned adjacent to the first magnet;
- a second magnet;
- a second ferromagnetic element positioned adjacent to the second magnet and relative to the first ferromagnetic element to create a gap between the first ferromagnetic element and the second ferromagnetic element;
- and
- a third magnet positioned between the first ferromagnetic element and the second ferromagnetic element and within the gap;
- and
- a shell positioned at a predetermined distance from the first magnet and the second magnet, to envelop at least the first magnet and the second magnet, wherein the predetermined distance is based on the desired magnetic field strength, and wherein thickness of the shell corresponds to the predetermined distance.
5 more elements
A method of directing magnetic fields into a measurement volume, the method comprising:
- generating a first magnetic field in a first direction with a first magnetic field strength;
- distributing the first magnetic field into the measurement volume to create a substantially uniform magnetic flux;
- increasing a total magnetic flux into the measurement volume by directing a second magnetic field in a second direction with a second magnetic field strength, wherein the second direction is parallel to the first direction;
- and
- determining a distance to position a shell from the measurement volume that can generate the first magnetic field strength and the second magnetic field strength based on the size of the measurement volume, wherein positioning the shell at the distance from the measurement volume substantially eliminates a magnetic field outside of the shell.
2 more elements
Dependencies are inferred from the claim text.