Multi-turn counter sensor

US10724844B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Jürgen Zimmer · Neubiberg, DE
• Sebastian Luber · Garching bei München, DE
• Thomas Bever · Munich, DE
• Hansjoerg Walter Kuemmel · Munich, DE
• Christian Kegler · Munich, DE

Key dates

• Filing date: Jan 9, 2018
• Grant date: Jul 28, 2020
• Expiry date: Apr 29, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/072
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An example multi-turn counter (MTC) sensor includes a magnetic strip that includes a domain wall generator located at a first end of the magnetic strip, where the domain wall generator is to generate at least one domain wall in the magnetic strip, the at least one domain wall configured to propagate based on a magnetic field caused by a magnet; wherein a location of the at least one domain wall indicates a turn count of the magnetic field of the magnet; the turn count to indicate one or more of a predefined fraction of a full rotation of the magnetic field; an end tip located at a second end of the magnetic strip, where the second end of the magnetic strip is opposite the first end; and a plurality of overlapping strip turns that cause a plurality of crossings in the magnetic strip.