Patent attributes
A wireless power transfer system includes: a station that a vehicle is capable of entering and leaving; and a bottom part detection sensor having a detection unit capable of detecting an object that enters a detection range, provided at the station, and that outputs a bottom part detection signal corresponding to a portion, which enters the detection range, of a bottom part of the vehicle. The wireless power transfer system executes: a detection signal output step in which the bottom part detection sensor outputs a time-series bottom part detection signal when the vehicle moves in the station at a predetermined speed that is a prescribed speed; and a coil position information extraction step of extracting, from the time-series bottom part detection signal, coil position information that is information about a position of an electric power receiving coil in the vehicle.
