Methods and apparatus for collocating electromagnetic coils and electronic circuits
First Claim
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1. An apparatus comprising:
- a plurality of electromagnetic coils and a plurality of circuit boards, said circuit boards have a planar surface and a thickness extending in a thickness direction orthogonal to said planar surface, said plurality of electromagnetic coils being positioned parallel to a referential plane,wherein at least one of said plurality of electromagnetic coils has at least one symmetry plane perpendicular to said referential plane, andwherein the planar surface of at least one of said plurality of circuit boards is positioned along one of said at least one symmetry plane of said at least one of said plurality of electromagnetic coils, so that the thickness direction of said at least one of said plurality of circuit boards is orthogonal to the magnetic field of said at least one of said plurality of electromagnetic coils.
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Abstract
Methods and apparatus according to the invention include inductive units or apparatus such as magnetic metal detectors comprising multiple electromagnetic coils and circuit boards such as electronic printed circuit boards (PCBs) so that the circuit boards, while containing metallic surfaces and layers, are positioned in such a way as to reduce or eliminate their effect on the metal detector'"'"'s coils. The apparatus comprising: a plurality of electromagnetic coils and a plurality of circuit boards, and wherein at least one of said circuit boards is positioned so that its thickness direction is orthogonal to the magnetic field of at least one of said coils.
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16 Claims
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1. An apparatus comprising:
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a plurality of electromagnetic coils and a plurality of circuit boards, said circuit boards have a planar surface and a thickness extending in a thickness direction orthogonal to said planar surface, said plurality of electromagnetic coils being positioned parallel to a referential plane, wherein at least one of said plurality of electromagnetic coils has at least one symmetry plane perpendicular to said referential plane, and wherein the planar surface of at least one of said plurality of circuit boards is positioned along one of said at least one symmetry plane of said at least one of said plurality of electromagnetic coils, so that the thickness direction of said at least one of said plurality of circuit boards is orthogonal to the magnetic field of said at least one of said plurality of electromagnetic coils. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for collocating a plurality of electromagnetic coils and a plurality of circuit boards in a detector, said plurality of circuit boards have a planar surface and a thickness extending in a thickness direction orthogonal to said planar surface, said plurality of electromagnetic coils being positioned parallel to a referential plane, and wherein at least one of said plurality of electromagnetic coils has at least one symmetry plane perpendicular to said referential plane, the method comprising:
placing the planar surface of at least one of said circuit boards along one of said at least one symmetry plane of said at least one of said plurality of electromagnetic coils so that the thickness direction of said at least one of said plurality of circuit boards is orthogonal to the magnetic field of said at least one of said plurality of electromagnetic coils. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
Specification