Position sensor and linear actuator

US9057628B2 · kind B2 · utility

Assignee

• Mahle International GmbH · DE

Inventors

• Hans-Peter Drespling · Heidenheim, DE
• Marc Niebel · Winnenden, DE
• Jochen Waidelich

Key dates

• Filing date: Jul 21, 2010
• Grant date: Jun 16, 2015
• Expiry date: Nov 21, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D5/145
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A linear magnetic position sensor may include a magnetic field generating unit having two permanent magnets for generating a magnetic field. A Hall sensor may be disposed in a region of the magnetic field forming a linear measuring section, wherein the Hall sensor and the magnetic field generating unit are linearly displaceable relative to one another along a longitudinal direction in order to position the Hall sensor within the measuring section. The permanent magnets may be polarized in a transverse direction running perpendicular to the longitudinal direction. The permanent magnets may be spaced apart from one another in the longitudinal direction. Each pole of one of the permanent magnets may be connected to a pole of the other permanent magnet via a magnetic conductor element.