Parking Assistance System

A parking assistance system comprising:

• a light source provided at a parking position at which a power transmission coil is provided, and configured to emit light;
• at least two light reception units mounted away from each other on a vehicle including a power reception coil, and each configured to receive the light emitted from the light source by using a position sensitive detector;
• an incident-angle calculation unit configured to calculate an incident angle of the light on each of the at least two light reception units;
• a distance calculation unit configured to calculate a distance between the parking position and the vehicle from the incident angles of the light on the at least two light reception units;
• and
• a detection unit configured to detect that the vehicle has approached the parking position, wherein
• a light volume of the light source is reduced when the detection unit detects that the vehicle has approached the parking position.