Torque measurement with correction of an external magnetic field

US12247894B2 · kind B2 · utility

Assignee

• NCTE AG · DE

Inventors

• Julian Nacke · Munich, DE
• Florian Eckschlager · Riemerling, DE
• Bernhard Mayr · Hard, AT

Key dates

• Filing date: Jul 15, 2022
• Grant date: Mar 11, 2025
• Expiry date: Apr 6, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L25/003
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A drive bearing includes an element rotatably mounted and which comprises magnetized magnetostrictive material. A torque can be applied to the element and the magnetostrictive magnetized material is formed to generate at a first position outside the element a magnetic field as a function of the torque applied. A measuring circuit comprises a first magnetic field sensor for detecting a total magnetic field at the first position, the total magnetic field comprising the magnetic field generated by the magnetostrictive magnetized material and an external magnetic field. The first magnetic field sensor outputs a first signal as a function of the total magnetic field detected. A second magnetic field sensor detects the external magnetic field at a second position and outputs a second signal as a function of the external magnetic field detected. The measuring circuit determines a value of the torque applied using the first and the second signals.