Magnetic sensor for absolute counting of revolutions or linear distances

US10228267B2 · kind B2 · utility

Assignees

• Horst Siedle GmbH & Co. KG · DE
• LEIBNIZ-INSTITUT FUR PHOTONISCHE TECHNOLOGIEN E.V. · DE

Inventors

• Roland Mattheis · Jena, DE
• Marco Diegel · Jena, DE

Key dates

• Filing date: Nov 3, 2014
• Grant date: Mar 12, 2019
• Expiry date: Jan 17, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/098
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A magnetic sensor for the absolute counting of revolutions or linear distances includes a soft magnetic loop structure, which is populated with a predeterminable number of magnetic domains and provided with GMR or TMR layer assemblies, in which at least two separate coplanar loops having predominantly straight subsegments extending in a rhombus-like arrangement with respect to each other are provided, and the at least two loops are connected to each other via a shared intersecting point, wherein directly in front of each intersecting region in which, and after which, the domains can change from one loop to the neighboring loop, these sections of the loop structure are bent away from the conductor guidance and are curved in a siphon-like manner in this region so as to be directed into the interior of the loop structure, wherein the conductors in respective siphon-like troughs intersect each other perpendicularly.