Abstract: A sensor device for an electric machine includes a rotor shaft mounted rotatably in a housing, with a signal generator that is or can be joined non-rotatably to the rotor shaft and is or can be arranged axially on the end face of the rotor shaft. A signal sensor is fixed to the housing opposite on the end face of the signal generator and at a distance from the signal generator. The signal sensor acquires an axial distance from the signal generator.

Abstract: A sensor and a method for generating training data for a machine learning classifier in a sensor. The method includes: detecting a first sensor signal and a second sensor signal with the aid of the sensor; ascertaining whether the machine learning classifier classifies the first sensor signal as a predefined user motion pattern; ascertaining whether a classification model classifies the second sensor signal as a predefined user input for controlling a device, the user input being assigned to the user motion pattern; ascertaining a training data vector for the machine learning classifier if the second sensor signal has been classified as the predefined user input, and if the first sensor signal has not been classified as the user motion pattern, ascertaining a training data vector for the machine learning classifier, the training data vector including the first sensor signal as well as the user motion pattern.

Abstract: A sensor device for an electric machine includes a rotor shaft mounted rotatably in a housing, with a signal generator that is or can be joined non-rotatably to the rotor shaft and is or can be arranged axially on the end face of the rotor shaft. A signal sensor is fixed to the housing opposite on the end face of the signal generator and at a distance from the signal generator. The signal sensor acquires an axial distance from the signal generator.