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US 2011/0030463 A1Published application
Steering angle sensing apparatus and method thereof
AssigneeLG Innotek Co., Ltd.
InventorsKyong Ho Kang, Choon Wook Park, Sung Kyu Bae, Chang Hwan Lee
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Abstract
A steering angle sensing apparatus and method are provided. The apparatus and method sense the steering angle of a steering shaft by using a rotated bit value difference corresponding to the rotated angles of magnets, which are respectively coupled on an axis of one of a plurality of sub gears, when the sub gears with respectively different gear ratios rotate with a shaft gear that rotates together with the steering shaft.
Claims13
A steering angle sensing apparatus comprising:
- a case;
- a cover coupled to the case;
- an output shaft of a steering torque sensor;
- wherein at least a portion of the output shaft is disposed between the case and the cover;
- a shaft gear directly coupled to the output shaft;
- a first sub gear rotating with the shaft gear;
- a second sub gear having a gear ratio different from a gear ratio of the first sub gear and rotating with the shaft gear;
- a first magnet coupled to the first sub gear;
- a second magnet coupled to the second sub gear;
- a first and a second angle detecting portion disposed on the cover and spaced a predetermined distance respectively from the first and second magnets, and respectively outputting rotated bit values corresponding to rotated angles of the first and second magnets, wherein the first and second angle detecting portions are rotary hall integrated circuits;
- and
- a steering angle calculating portion configured to calculate an absolute steering angle from the rotated bit values.
9 more elements
Dependencies are inferred from the claim text.