Sensor arrangement for the contactless sensing of angles of rotation on a rotating part

US10330498B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Stefan Leidich · Rutesheim, DE
• Ralf Ameling · Aalen, DE

Key dates

• Filing date: Sep 29, 2015
• Grant date: Jun 25, 2019
• Expiry date: Jan 20, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R27/267
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In one embodiment, a sensor arrangement for the contactless sensing of angles of rotation on a rotating part includes a disk-shaped target, a coil arrangement, and an evaluation and control unit. The disc-shaped target is coupled to the rotating part and includes at least two metal surfaces that influence the inductances in the flat detection coils due to eddy current effects as a function of the degree of overlap. The disc-shaped target can generate at least one piece of information for ascertaining the instantaneous angle of rotation of the rotating part, in connection with the coil arrangement. The coil arrangement has three flat detection coils uniformly distributed on the circumference of a circle. The evaluation and control unit can generate essentially sinusoidal evaluation signals which represent the changes in inductance of the detection coils and can evaluate them for calculating the angle of rotation.