Position detection device

Abstract

A position detection device, configured to detect a position of a shaft that moves forward and backward in an axial direction, is provided with an excitation coil that generates an alternating magnetic field; a target which is fixed to the shaft and in which a magnetic flux of the alternating magnetic field is interlinked; and a detection coil in which the magnetic flux of the alternating magnetic field is interlinked, wherein the detection coil has a first portion and a second portion, where an induced voltage is generated by the magnetic flux of the alternating magnetic field being interlinked, and a connecting path connecting the first portion and the second portion. The first portion and the second portion respectively extend along the axial direction and the coil longitudinal direction parallel to the axial direction and at least a portion of each is aligned in an alignment direction perpendicular to the axial direction. The target includes a first target portion facing the first portion, and a second target portion facing the second portion. The induced voltage generated in the first portion changes according to a position of the first target portion relative to the first portion. The induced voltage generated in the second portion changes according to a position of the second target portion relative to the second portion.

Dependencies are inferred from the claim text.