| 摘要 |
PCT No. PCT/GB92/00791 Sec. 371 Date Apr. 28, 1994 Sec. 102(e) Date Apr. 28, 1994 PCT Filed Apr. 30, 1992 PCT Pub. No. WO93/06569 PCT Pub. Date Apr. 1, 1993.Coin discrimination apparatus includes a coin rundown path along which coins roll so as to impact a snubber provided with a piezo electric device. 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 is made. Coin acceptability is determined on the basis of the value of the coin parameter signal.
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