Spool position detection for a hydraulic valve

摘要

A position sensor senses the position of an article that moves over a short predetermined path. The position sensor is contained in a housing which is mounted in a fixed location adjacent the article and has an internal cavity in which a valve follower travels guided by the walls of the cavity to describe a predetermined path in the axial direction. The valve follower is operatively coupled with the article and carries a sensed magnetic element. A sensor is mounted in the housing adjacent the path of the valve follower, such that the sensed element moves laterally under the sensor and the sensor generates a signal indicative of its position.