BANKNOTE MONITORING DEVICE, BANKNOTE MONITORING SYSTEM, AND BANKNOTE MONITORING METHOD

摘要

To provide a banknote monitoring device capable of detecting that a form of a banknote has been changed.SOLUTION: A banknote monitoring device 1 includes a receiving part (terminal device 3) that receives information transmitted by a plurality of banknote processing device that process a banknote with a serial number, and a control part that acquires recognition rate information of the serial number based on a predetermined number or more pieces of information. The control part acquires a change amount of the recognition rate information per predetermined time, and outputs information indicating that the absolute value of the change amount is greater than a predetermined threshold value when the absolute value of the change amount is greater than the predetermined threshold value.SELECTED DRAWING: Figure 1