| 摘要 |
<p>In order to verify whether the coin (2) possesses the stamped pattern of an acceptable coin, the surface of the coin is scanned by an inductive probe (5) over a track (10), thus producing a signal which corresponds to the depth of the impression along the track (10). The relative movement of the probe (5), which is needed for scanning, in relation to the coin (2) is obtained as the coin (2) rolls past the probe (5). A memory stores, as comparison signals, signals for tracks (10, 11) displaced in relation to one another on the face and reverse of all acceptable coins. These signals are obtained as the coins roll past the probe (5) from various starting positions. The verification signal received for the coin to be checked is compared with each of the stored comparison signals, if one of these comparisons results in acceptance within specific limits, an acceptance signal is generated.</p> |
