| 摘要 |
<p>A terminal such as an ATM (10) operated by a magnetic stripe card or a smart card is provided with a detector (30) to sense cracks or distortions of the card (3). A transmitter (5) and receiver(6) are positioned so that radiation is transmitted through or reflected from the card. If the received signal differs from a preset level, indicating an unacceptable card, the card is returned to the user and does not enter the card read head (36). <IMAGE></p> |
