ROTATION ANGLE AND TORQUE DETECTION DEVICE
First Claim
1. A detection device for detecting a rotation angle and a torque, comprising:
- a first rotating body;
a first target fixed to the first rotating body, the first target having a plurality of magnetic poles arranged at equal intervals;
a first gear fixed to the first rotating body;
a first magnetic detector element facing the magnetic poles of the first target to detect a rotation angle of the first rotating body;
a second gear engaged with the first gear;
a second rotating body having the second gear fixed thereto, the second rotating body rotating with the first rotating body at a speed slower than the first rotating body;
a first magnet provided at the second rotating body;
a second magnetic detector element facing the first magnet to detect a rotation angle of the second rotating body;
a third rotating body;
a second target fixed to the third rotating body, the second target having a plurality of magnetic poles arranged at equal intervals;
a third magnetic detector element facing the magnetic poles of the second target to detect a rotation angle of the third rotating body;
a torsion bar connected between the first rotating body and the second rotating body; and
a controller operable to determine the rotation angle of the first rotating body and a torque applied to the torsion bar based on signals output from the first magnetic detector element, the second magnetic detector element, and the third magnetic detector element.
2 Assignments
0 Petitions
Accused Products
Abstract
A detection device includes a first rotating body, a first target fixed to the first rotating body, a first gear fixed to the first rotating body, a first magnetic detector element for detecting a rotation angle of the first rotating body, a second gear engaged with the first gear, a second rotating body having the second gear fixed thereto, a magnet provided at the second rotating body, a second magnetic detector element for detecting a rotation angle of the second rotating body, a third rotating body, a second target fixed to the third rotating body, a third magnetic detector element for detecting a rotation angle of the third rotating body, a torsion bar connected between the first rotating body and the second rotating body, and a controller operable to determine the rotation angle of the first rotating body and a torque applied to the torsion bar based on signals output from the first, second, and third magnetic detector element. The detection device detects an absolute rotation angle of plural turns and a torque.
15 Citations
20 Claims
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1. A detection device for detecting a rotation angle and a torque, comprising:
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a first rotating body; a first target fixed to the first rotating body, the first target having a plurality of magnetic poles arranged at equal intervals; a first gear fixed to the first rotating body; a first magnetic detector element facing the magnetic poles of the first target to detect a rotation angle of the first rotating body; a second gear engaged with the first gear; a second rotating body having the second gear fixed thereto, the second rotating body rotating with the first rotating body at a speed slower than the first rotating body; a first magnet provided at the second rotating body; a second magnetic detector element facing the first magnet to detect a rotation angle of the second rotating body; a third rotating body; a second target fixed to the third rotating body, the second target having a plurality of magnetic poles arranged at equal intervals; a third magnetic detector element facing the magnetic poles of the second target to detect a rotation angle of the third rotating body; a torsion bar connected between the first rotating body and the second rotating body; and a controller operable to determine the rotation angle of the first rotating body and a torque applied to the torsion bar based on signals output from the first magnetic detector element, the second magnetic detector element, and the third magnetic detector element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification