Patent ID: 8493237

Claim:
A parking arrangement with parking places for vehicles and with an automatic vehicle detection system which comprises a central computer system and at each of at least a number of parking places at least one wirelessly operating parking sensor module for determining a presence or absence of a vehicle in the respective parking place, which parking sensor module comprises at least one vehicle sensor, which in operation provides measuring values which are representative of the presence or absence of the vehicle, characterized by calibration means for determining a quiescent value, representing the absence of the vehicle, of the measuring values of the at least one vehicle sensor, which calibration means are configured, by a self-organizing map method, to divide the measuring values provided by the vehicle sensor into clusters of mutually close values, wherein the cluster having a largest number of measuring values is selected as representative of the quiescent value of the measuring values at the respective parking place, and wherein after each new measuring value which is added to the largest cluster an adjusted quiescent value is determined, and wherein the measuring value which differs from the quiescent value by more than a predetermined threshold value indicates that the vehicle is situated in the parking place.