Fecha de publicación: 08/12/2022 Fuente: WIPO (eseential oils OR extracts) One embodiment of this angle detection device is provided with: three magnetic sensors for detecting magnetic flux changes due to rotation of a rotating shaft; and a signal processing unit for processing signals outputted from the three magnetic sensors. The signal processing unit: acquires sensor signals outputted from the three magnetic sensors; extracts an intersection where two sensor signals of the three sensor signals intersect with one another as well as a zero crossing point where each of the three sensor signals intersects with a reference signal level; generates a linear function θ(Δx) representative of a straight line linking the intersections adjacent to one another and the zero crossing point; calculates, as a first angle error, the deviation between a mechanical angle θ calculated on the basis of the linear function θ(Δx) for a plurality of points on the straight line and a mechanical angle θe acquired from an encoder installed on the rotating shaft; and generates a first angle error function for calculating a first angle error corresponding to any point on the straight line on the basis of the first angle error calculated for the plurality of points on the straight line.