Sensor Arrangement and Method for Detecting a Rotational Movement of a Body that can Rotate About a Rotational Axis

Abstract

A sensor arrangement for acquiring a rotational movement of a body that can rotate about a rotational axis has at least three angle sensors and at least one evaluation and control unit. The at least three angle sensors each acquire the mechanical rotational movement of the rotatable body with a predefined transmission ratio and generate a corresponding electrical angle signal and output said angle signal to the at least one evaluation and control unit. The at least three angle sensors have different transmission ratios. The at least one evaluation and control unit are designed to determine a first angle of the rotatable body with a first uniqueness range by way of a first nonius calculation that is based on two electrical angle signals of the at least three electrical angle signals. The first uniqueness range of the determined first angle is greater than uniqueness ranges of the angle signals used for the calculation. The at least one evaluation and control unit is further designed to determine a second angle of the rotatable body with a second uniqueness range by way of a second nonius calculation that is based on the determined first angle and a further electrical angle signal of the at least three electrical angle signals. The second uniqueness range of the determined second angle is greater than the first uniqueness range of the determined first angle and a uniqueness range of the further electrical angle signal. Also disclosed is a method for acquiring a rotational movement of a body that can rotate about a rotational axis which can be carried out using such a sensor arrangement.

Dependencies are inferred from the claim text.