Ultra-thin combined inductive torque and angle sensor for steering wheel position sensing

US10837848B2 · kind B2 · utility

Assignee

• Integrated Device Technology, Inc. · US

Inventors

• Josef Janisch · Ilz, AT
• Andreas Buchinger · Zell an der Ybbs, AT

Key dates

• Filing date: Dec 11, 2017
• Grant date: Nov 17, 2020
• Expiry date: Dec 11, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D5/2053
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention discloses an inductive torque sensor and a combined inductive torque and angle sensor for position sensing. The object of the invention to propose a torque sensor as well as a combined torque and angle sensor which does not require a shielding of the sensor PCB and which can provide a plausibility check of the torque sensor when using only three sensors will be solved by an inductive torque sensor for detection of torque movements comprising a stationary printed circuit board (PCB) with sensing coils, a primary target and a secondary target, whereas the primary target and secondary target each comprise of different metallic patterns, whereas each target covers 50% of the sensing coils and the combined coverage of both targets varies between 50% and 100% depending on the relative position between the two targets. The objective is also solved by a combined inductive torque and angle sensor comprising a primary target wheel, a secondary target wheel and a torsion beam, whereas the primary target wheel is centrally stacked on the torsion beam and comprises a metallic pattern for a steering angle 360° single-turn sensor and a first metallic pattern for the torque sensor, a…