Magnetic position sensor for measuring linear displacement

US6670806B2 · kind B2 · utility

Assignee

• KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

• Matthias Wendt · Neu-Anspach, DE
• Reinhold Elferich · Aachen, DE

Key dates

• Filing date: Feb 25, 2002
• Grant date: Dec 30, 2003
• Expiry date: Feb 25, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/8242
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a device with a magnetic position sensor comprising a field sensor (5) and analysis electronics (7) for linear displacements of a rod-shaped component (3), in particular the shaft of an actuator, with an element (M) generating a magnetic field (4) and a position sensor measuring the magnetic field strength angle of this field, the field angle signal determined by this sensor being used for displacement path determination. The element generating a magnetic field (4) is an axially magnetized magnet casing (M) which surrounds the rod-shaped component (3) of the actuator itself, is fixedly connected thereto and can rotate therewith about its displacement axis (z).