Abstract: An angle detection system which includes a signal generator and at least one at least biaxial Hall sensor which is configured to generate at least two measurement signals in at least two different measuring directions on a basis of a magnetic field that changes due to rotation of the signal generator. The signal generator includes a magnet that is polarized such that a magnetic field strength measured by the Hall sensor changes as the signal generator rotates, and the signal generator being arranged within the detection range of the at least one Hall sensor. Based on the measurement signals generated by the at least one Hall sensor, an angular position of the signal generator is determined in a control unit, in particular on the principle of machine learning. Further indicated are an angle detection system and a valve.