Rotational angle detection devices
AssigneeAisan Kogyo Kabushiki Kaisha
InventorsTutomu Ikeda, Kazumasa Nakashima
Life of this patent
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Abstract
A rotational angle detecting device includes a magnet support and a pair of magnets attached to the magnet support. The magnets oppose each other to produce a substantially unidirectional magnetic field between the magnets. A sensor is disposed within the magnetic field and serves to detect the change of direction of the magnetic field as the magnets and sensor rotate relative to each other. The sensor outputs a signal or signals representing the relative rotational angle across the entire range of relative rotation between the sensor and the magnets.
Claims19
A rotational angle detecting device comprising:
- a magnet support;
- at least two magnets attached to the magnet support, so that the magnets produce a magnetic field across a center of rotation;
- a sensor disposed within the magnetic field and arranged and constructed to detect a change of direction of the magnetic field as the magnets and sensor rotate relative to each other;
- wherein the sensor outputs signals representing a relative rotational angle.
A rotational angle detecting device comprising:
- a magnet support;
- a pair of magnets attached to the magnet support, so that the magnets produce a magnetic field across a center of rotation;
- wherein the magnetic field is substantially uniform and unidirectional across the center of rotation;
- a sensor disposed within the magnetic field and arranged and constructed to detect a change of direction of the magnetic field as the magnets and sensor rotate relative to each other;
- wherein the sensor outputs signals representing a relative rotational angle.
Dependencies are inferred from the claim text.