MAGNETIC POSITION SENSOR WITH FIELD DIRECTION MEASUREMENT AND FLUX COLLECTOR
First Claim
1. A contactless position sensor comprising:
- at least a permanent magnet emitting a magnetic field, at least one detection element sensitive to the direction of the magnetic field and at least a pair of flux collectors, the permanent magnet being moveable in a displacement direction and exhibiting a direction of magnetization that can vary continuously along the displacement direction;
each flux collector exhibiting at least one portion, provided with an end, extending substantially along the displacement direction of the magnet;
the ends of the pair of flux collectors defining an air gap oriented along the displacement direction of the magnet; and
the detection element being positioned outside the air gap and substantially equidistant from the ends.
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Accused Products
Abstract
The present disclosure relates to a magnetic position sensor with field direction measurement and a flux collector. The disclosure proposes to measure two magnetic induction components at one and the same point, harmonizing the amplitude of the two magnetic induction components using flux collectors so as to have a ratio of the amplitudes of these two components close to one. For this purpose, the disclosure provides a contactless position sensor including at least one permanent magnet, emitting a magnetic field, at least one detection element sensitive to the direction of the magnetic field, and at least one pair of flux collectors, the permanent magnet being capable of moving in a direction of displacement and having a direction of magnetization that can be continuously varied according to the direction of displacement. Each flux collector has at least one portion, provided with an end, extending substantially along the direction of displacement of the magnet. The ends of a pair of flux collectors define a gap oriented along the direction of displacement of the magnet. The detection element is positioned outside the gap and substantially equidistant from the ends.
18 Citations
20 Claims
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1. A contactless position sensor comprising:
- at least a permanent magnet emitting a magnetic field, at least one detection element sensitive to the direction of the magnetic field and at least a pair of flux collectors, the permanent magnet being moveable in a displacement direction and exhibiting a direction of magnetization that can vary continuously along the displacement direction;
each flux collector exhibiting at least one portion, provided with an end, extending substantially along the displacement direction of the magnet; the ends of the pair of flux collectors defining an air gap oriented along the displacement direction of the magnet; and the detection element being positioned outside the air gap and substantially equidistant from the ends. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- at least a permanent magnet emitting a magnetic field, at least one detection element sensitive to the direction of the magnetic field and at least a pair of flux collectors, the permanent magnet being moveable in a displacement direction and exhibiting a direction of magnetization that can vary continuously along the displacement direction;
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14. A position sensor assembly comprising:
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a moveable magnet emitting a magnetic field; at least one detector mounted on a circuit board, the detector sensing a direction of the magnetic field; at least two flux collectors separated by a gap, with the detector being positioned outside of the gap; and radial and tangential components of a tangential induction measured by the detector exhibiting a substantially equal amplitude. - View Dependent Claims (15, 16, 17, 18)
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19. A position sensor assembly comprising:
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a moveable magnet emitting a magnetic field; at least one detector sensing a direction of the magnetic field; and at least one flux collector having a folded shape including multiple bends. - View Dependent Claims (20)
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Specification