| 摘要 |
Users need to be encouraged to return vehicles such as airport baggage trolleys or supermarket trolleys to a vehicle storage area. The area is equipped with an entrance fitted with a system for dispensing a reward for each vehicle returned to the area. The system comprises detector means (16, 17) for detecting the presence of a vehicle at the entrance to the storage area, control means for determining whether a vehicle has been effectively returned (and not just passed back-and-forth past the detector means), and means (23) for dispensing a reward such as a ticket exchangeable for a benefit of some kind for each returned vehicle. Said detector means comprise two detectors which are disposed in line along a vehicle return path at said entrance and which are so spaced relative to each other as to be capable of being triggered simultaneously by a single member of a vehicle as said vehicle is moved along said path past said detector means, whereby the direction of vehicle movement past the detector means can be determined by the control means. |
