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US 2002/0153879 A1Published application
Non-contact position sensor
AssigneeMikuni Corporation
InventorsTetsuo Muraji, Mitsuru Sekiya
Life of this patent
Estimating the term…
Abstract
A non-contact position sensor including a first stator having two magnet facing sides, a second stator having one magnet facing side aligned with the two magnet facing sides along a locus, a hall element between the first and second stators, and two magnets located next to each other along the locus opposite the three magnet facing sides so as to move freely along the locus. When configured as a rotary sensor, an arbitrary angle of usage can be set. When configured as a linear sensor, a magnet can be made thick without increasing leakage of magnetic flux.
Claims61
A non-contact position sensor comprising:
- a first stator having first and second magnet facing sides;
- a second stator having a magnet facing side aligned with the first and second magnet facing sides of the first stator along a locus;
- a hall element between the first and second stators;
- and
- first and second magnets located next to each other along the locus opposite the first and second magnet facing sides of the first stator and the magnet facing side of the second stator so as to move freely along the locus.
2 more elements
An apparatus comprising:
- a non-contact position sensor including
- a first stator having first and second magnet facing sides, and
- a second stator having a magnet facing side between the first and second magnet facing sides of the first stator and aligned with the first and second magnet facing sides of the first stator along a locus.
An apparatus comprising:
- a non-contact sensor including a magnet having a range of movement from a first position to a second position with a third position between the first and second positions, a first stator having first and second magnet facing sides, a second stator having a magnet facing side, and a hall element, information being determined in accordance with changes in magnetic flux in the hall element corresponding to changes in magnetic fields passing through the hall element due to movement of the magnet, wherein the magnet, the first stator, the second stator and the hall element are arranged so that,
- when the magnet is in the third position, a first magnetic circuit passes through the first and second magnet facing sides of the first stator, but does not pass through the second stator or the hall element, and a second magnetic circuit passes through the magnet facing side of the second stator and the magnet, but does not pass through the first stator or the hall element,
- when the magnet is at the first position, a magnetic circuit passes through the second magnet facing side of the first stator, the magnet facing side of the second stator, the hall element and the magnet, but does not pass through the first magnet facing side of the first stator, and
- when the magnet is at the second position, a magnetic circuit passes through the first magnet facing side of the first stator, the magnet facing side of the second stator, the hall element and the magnet, but does not pass through the second magnet facing side of the first stator.
1 more element
An apparatus comprising:
- a non-contact sensor including a magnet having a range of movement from a first position to a second position with a third position between the first and second positions, a first stator having first and second magnet facing sides, a second stator having a magnet facing side, and a hall element, information being determined in accordance with changes in magnetic flux in the hall element corresponding to changes in magnetic fields passing through the hall element due to movement of the magnet, wherein the magnet, the first stator, the second stator and the hall element are arranged so that,
- when the magnet is in the third position, a first magnetic circuit passes through the first and second magnet facing sides of the first stator and the magnet, but does not pass through the second stator or the hall element, and a second magnetic circuit passes through the magnet facing side of the second stator and the magnet, but does not pass through the first stator or the hall element,
- when the magnet is at the first position, a first magnetic circuit passes through the second magnet facing side of the first stator, the magnet facing side of the first stator and the magnet, but does not pass through the first magnet facing side of the first stator or the hall element, second and third magnetic circuits each pass through the second magnet facing side of the first stator, the magnet facing side of the second stator, the hall element and the magnet, but do not pass through the first magnet facing side of the first stator, and a fourth magnetic circuit passes through the second magnet facing side of the first stator and the magnet, but does not pass through the first magnet facing side of the first stator, the magnet facing side of the second stator or the hall element, and
- when the magnet is at the second position, a first magnetic circuit passes through the first magnet facing side of the first stator, the magnet facing side of the first stator and the magnet, but does not pass through the second magnet facing side of the first stator or the hall element, second and third magnetic circuits each pass through the first magnet facing side of the first stator, the magnet facing side of the second stator, the hall element and the magnet, but do not pass through the second magnet facing side of the first stator, and a fourth magnetic circuit passes through the first magnet facing side of the first stator and the magnet, but does not pass through the second magnet facing side of the second stator, the magnet facing side of the second stator or the hall element.
1 more element
An apparatus comprising:
- a non-contact sensor including a magnet having a range of movement from a first position to a second position with a third position between the first and second positions, a first stator having first and second magnet facing sides, a second stator having a magnet facing side, and a hall element, information being determined in accordance with changes in magnetic flux in the hall element corresponding to changes in magnetic fields passing through the hall element due to movement of the magnet, wherein the magnet, the first stator, the second stator and the hall element are arranged so that,
- when the magnet is in the third position, a magnetic circuit passes through the magnet facing side of the second stator and the magnet, but does not pass through the first stator or the hall element,
- when the magnet is at the first position, a first magnetic circuit passes through the second magnet facing side of the first stator, the magnet facing side of the second stator and the magnet, but does not pass through the first magnet facing side of the first stator or the hall element, and a second magnetic circuit passes through the second magnet facing side of the first stator, the magnet facing side of the second stator, the hall element and the magnet, but does not pass through the first magnet facing side of the first stator, and
- when the magnet is at the second position, a first magnetic circuit passes through the first magnet facing side of the first stator, the magnet facing side of the second stator and the magnet, but does not pass through the second magnet facing side of the second stator or the hall element, and a second magnetic circuit passes through the first magnet facing side of the first stator, the magnet facing side of the second stator, the hall element and the magnet, but does not pass through the second magnet facing side of the first stator.
1 more element
An apparatus comprising:
- a non-contact rotary position sensor having an output characteristic angle with a cycle settable greater than 180°.
A non-contact position sensor comprising:
- a first stator having first and second magnet facing sides;
- a second stator having a magnet facing side aligned with the first and second magnet facing sides of the first stator along a locus;
- a hall element between the first and second stators;
- and
- at least one magnet opposite at least one of the group consisting of the first magnet facing side of the first stator, the second magnet facing side of the first stator and the magnet facing side of the second stator.
2 more elements
Dependencies are inferred from the claim text.