COIN DISCRIMINATION APPARATUS

摘要

Coin discrimination apparatus includes a coin rundown path (4) along which coins roll so as to impact a snubber (8) provided with a piezo electric device (13). The coin impact produces an oscillatory voltage output from the device, which is sampled over a predetermined period for its peak maximum and minimum values. The values are combined in a predetermined relationship to produce a coin parameter signal indicative of coin mass and the material from which it it made. Coin acceptability is determined on the basis of the value of the coin parameter signal.