| CPC B65H 7/14 (2013.01) [B65H 9/00 (2013.01); G07D 11/17 (2019.01); G07D 11/22 (2019.01); B65H 2511/216 (2013.01); B65H 2511/24 (2013.01); B65H 2701/1311 (2013.01); B65H 2701/1912 (2013.01)] | 7 Claims |
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1. An apparatus for detecting a skew of banknotes conveyed along a conveying route in an automated teller machine (ATM), the apparatus comprising:
a plurality of detection sensors on a conveying route arranged to traverse the conveying route, the plurality of detection sensors configured to detect tips of the banknotes passing through the plurality of detection sensors and generate detection signals, the plurality of detections sensor comprising a center sensor, two first sensors at a first side of the conveying route relative to the center sensor and two second sensors at a second side of the conveying route opposite to the first side; and
a microprocessor coupled to the plurality of sensors and configured to:
divide each of the banknotes into a first sector and a second sector along a direction that is perpendicular to a direction along which the conveying route extends,
determine a first skew angle of the first sector of each of the banknotes based on differences in timing at which the detection signals are generated by the center sensor and the two first sensors;
determine a second skew angle of the second sector of each of the banknotes based on differences in times at which the detection signals are generated by the center sensor and the two second sensors;
determine a skew amount of each of the banknotes by adding the first skew angle and the second skew angle.
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