Position detection device
AssigneeProterial, Ltd.
InventorsYohei Shirakawa, Yuta Sugiyama
Life of this patent
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Abstract
A position detection device for detecting a position of a rack shaft having a rack teeth portion that meshes with a pinion gear in a part in an axial direction, is provided with a capacitance member that is arranged around a periphery of the rack shaft and forms a capacitive load together with the rack shaft, and a calculation unit that calculates the position of the rack shaft based on a capacitance between the rack shaft and the capacitance member. The capacitance member is arranged to face at least a part of the rack teeth portion. The capacitance changes in accordance with the position of the rack shaft.
Claims4
A position detection device configured to detect a position of a rack shaft having a rack teeth portion that meshes with a pinion gear in a part in an axial direction, comprising:
- a capacitance member that is arranged around a periphery of the rack shaft and forms a capacitive load together with the rack shaft;
- and
- a computation unit including a central processing unit configured to calculate the position of the rack shaft based on a capacitance between the rack shaft and the capacitance member,
- wherein the capacitance member is arranged to face at least a part of the rack teeth portion at a portion that meshes with the pinion gear, and wherein the capacitance changes in accordance with the axial position of the rack shaft.
Dependencies are inferred from the claim text.