Mittel zum Prüfen von Münzen.

摘要

A coin detection system and method of operation thereof, comprising a sensing circuit portion (42) including a sensor coil, which need be only a single sensor coil, positioned adjacent to the coin path and connected in circuit with a current ramp generator (48), preferably operable under control of a system control circuit portion (50), and a detector circuit portion (52) connected to the sensing circuit portion (42) to monitor and detect circuit performance characteristics and changes thereof that are effected by the presence of a coin (54) within the field of the sensor coil at the time a current ramp is applied to the sensor coil by the ramp generator (48), from which circuit performance characteristics a coin characteristic value, preferably a time constant characteristic, representative of the particular coin (54) present within the field of the sensor coil can be derived and thereafter utilized for coin detection, denomination discrimination, and coin sizing purposes.