Encoder
AssigneeDyson Technology Limited
InventorsMiltiadis Alexios PAPADOPOULOS, Robert James Kenward MCDOUGALL
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Abstract
A hybrid encoder comprising an inductive encoder and a magnetic encoder. The inductive encoder comprises a metal target having a ramped width, an inductor coil configured to generate an oscillating electromagnetic field, and an inductive sensing circuit configured to detect a manipulation of the oscillating electromagnetic field as the inductor coil moves relative to the metal target in a direction perpendicular to the width of the metal target. The magnetic encoder comprises at least one multipole magnet, and a magnetic sensing circuit configured to detect a change in magnetic field as the magnetic sensing circuit moves relative to the at least one multipole magnet.
Claims15
A hybrid encoder comprising:
- an inductive encoder, the inductive encoder comprising:
- a metal target having a ramped width;
- an inductor coil configured to generate an oscillating electromagnetic field;
- and
- an inductive sensing circuit configured to detect a manipulation of the oscillating electromagnetic field as the inductor coil moves relative to the metal target in a direction perpendicular to the width of the metal target;
- and
- a magnetic encoder, the magnetic encoder comprising:
- at least one multipole magnet;
- and
- a magnetic sensing circuit configured to detect a change in magnetic field as the magnetic sensing circuit moves relative to the at least one multipole magnet.
Dependencies are inferred from the claim text.