Ultrasonic Sensor for Detecting Double Sheets and Method of Detecting Double Sheets Using the Same

摘要

The present invention relates to an ultrasonic senso for detecting double sheets and a method of detecting double sheets using the same, in which in configuring the ultrasonic sensor for detecting double sheets of banknotes passing through a transfer path, the ultrasonic sensor is configured to include an ultrasonic wave generator and an ultrasonic wave receiver provided in pair to face each other in a direction perpendicular to a transfer direction of the banknotes with the transfer path for transferring the banknotes interposed therebetween, and periodicity of a reception signal detected by the ultrasonic wave receiver is determined to detect whether a zero sheet, a single sheet or double sheets of the banknotes pass through the transfer path according to generation or not of the periodic signal and/or a frequency of the generation.

主权项

1. An ultrasonic sensor for detecting double sheets of banknotes passing through a transfer path, comprising:
an ultrasonic wave generator and an ultrasonic wave receiver provided in pair to face each other in a direction perpendicular to a transfer direction of the banknotes with the transfer path for transferring the banknotes interposed therebetween, wherein periodicity of a reception signal detected by the ultrasonic wave receiver is determined, and whether double sheets of the banknotes pass through the transfer path is detected according to generation or not of the periodic signal.