Position Sensor Which Uses The Change Of The Magnetic Field's Angle

摘要

A position sensor using a change of a magnetic field angle is provided to detect a position change of an object through a low-cost sensing unit by converting a large linear position change into a small linear position change or a small angle position change or a large angle position change into the small linear position change or the small angle position change. A position sensor(100) using a change of a magnetic field angle includes a permanent magnet(10), a rotation axis, a guide path(29), and a magnetic flux direction detecting unit(30). The permanent magnet has different poles arranged opposite to each other and coupled with one end of the rotation axis. The guide path is formed at an outer periphery of the rotation axis at a predetermined angle and guides an end part(40) of an object. The magnetic flux direction detecting unit is installed to be spaced apart from the rotation axis at a predetermined distance and generates a predetermined position detecting voltage changed into a predetermined size according the change of the magnetic field angle.