公开(公告)号：US20150061654A1

公开(公告)日：2015-03-05

申请号：US14296906

申请日：2014-06-05

Applicant: ALPS ELECTRIC CO., LTD.

Inventor： Takashi ONODERA ,  Tokuo NAKAMURA ,  Takafumi NOGUCHI

IPC: G01B7/30 ,  G01R33/09

CPC classification number: G01B7/30 ,  B60T7/042 ,  G01D5/145 ,  G01R33/091

Abstract: A rod-shaped magnet is mounted on a rotating unit. The rod-shaped magnet has end surfaces which are oriented in a rotating direction and are magnetized to different magnetic poles. An angle detecting unit including magnetoresistive elements is disposed so as to be offset in a radial direction of a revolution path of the magnet from the revolution path and is configured to detect a change in angle of rotation of the rotating unit by detecting a leakage magnetic field in the vicinity of a side surface of the magnet. Two position detecting units each include magnetoresistive elements and are configured to detect a change in orientation of a magnetic field in the direction of a tangent to the revolution path when facing the rod-shaped magnet and produce a switch output.

Abstract translation: 棒状磁体安装在旋转单元上。 棒状磁体具有沿旋转方向取向并被磁化到不同磁极的端面。 包括磁阻元件的角度检测单元被设置为沿着磁体从旋转路径的旋转路径的径向方向偏移，并且被配置为通过检测泄漏磁场来检测旋转单元的旋转角度的变化 在磁铁的侧面附近。 两个位置检测单元各自包括磁阻元件，并且被配置为在面向杆状磁体时检测在旋转路径的切线方向上的磁场取向的变化并产生开关输出。