Magnetic steering angle detection apparatus
First Claim
1. A magnetic steering angle detection apparatus, comprising:
- a magnet rotating in synchronization with a steering shaft mounted on a vehicle; and
a magnetic sensor mounted on a column side, the magnetic sensor configured to detect a rotation angle of the steering shaft by sensing a change of a magnetic field emitted from the magnet, wherein the magnet has S and N poles arranged on a plane of which normal line is in a substantially axial direction of the steering shaft; and
the magnetic sensor is disposed such that a sensing direction thereof is set to be a substantially single direction and the sensing direction is made to substantially coincide with the axial direction of the steering shaft.
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Accused Products
Abstract
A magnetic steering angle detection apparatus includes a magnet rotating in synchronization with a steering shaft mounted on a vehicle, senses a change of a magnetic field from the magnet by use of a hall IC mounted on a column side, and detects a rotation angle of the steering shaft. The magnet has S and N poles arranged on a plane of which normal line is in a substantially axial direction of the steering shaft. The hall IC is disposed such that a sensing direction of the hall IC is set to be a substantially single direction and the sensing direction is made to substantially coincide with the axial direction of the steering shaft.
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Citations
6 Claims
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1. A magnetic steering angle detection apparatus, comprising:
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a magnet rotating in synchronization with a steering shaft mounted on a vehicle; and
a magnetic sensor mounted on a column side, the magnetic sensor configured to detect a rotation angle of the steering shaft by sensing a change of a magnetic field emitted from the magnet, wherein the magnet has S and N poles arranged on a plane of which normal line is in a substantially axial direction of the steering shaft; and
the magnetic sensor is disposed such that a sensing direction thereof is set to be a substantially single direction and the sensing direction is made to substantially coincide with the axial direction of the steering shaft. - View Dependent Claims (3, 5)
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2. A magnetic steering angle detection apparatus, comprising:
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a first gear rotating in synchronization with a steering shaft mounted on a vehicle;
a second gear rotating in synchronization with the first gear at a speed faster than a speed of the first gear;
a third gear rotating in synchronization with the first gear at a speed slower than a speed of the second gear;
magnets rotating in synchronization with the second and third gears, respectively;
magnetic sensors provided on column sides and in vicinities of the magnets of the second and third gears, respectively, the magnetic sensors configured to sense changes of magnetic fields from the magnets of the second and third gears; and
a computation unit configured to compute a rotation angle of the steering shaft by detecting rotation angles of the second and third gears based on sensing signals from the magnetic sensors, wherein each of the magnets provided on the second and third gears has S and N poles arranged on a plane of which normal is in a substantially axial direction of the steering shaft; and
each of the magnetic sensors is disposed such that a sensing direction thereof is set to be a substantially single direction and the sensing direction is made to substantially coincide with the axial direction of the steering shaft. - View Dependent Claims (4, 6)
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Specification