Bijection type ultrasonic module for bank note thickness detection

Abstract

The invention discloses a bijection type ultrasonic thickness detection module for bank note thickness detection. The bijection type ultrasonic thickness detection module comprises ultrasonic transmitters and ultrasonic receivers, which are arranged at intervals in pairs, and a controller, an ultrasonic transmission driving circuit, a signal amplifying and maintaining circuit, a signal collecting circuit and a signal discharging circuit. The bijection type ultrasonic thickness detection module disclosed by the invention detects the bank note thickness through ultrasonic, thereby simplifying the installation manner, improving the adaptability of the installation position and getting rid of the constraint of a following roller on the installation position, meanwhile, the signal amplifying and maintaining circuit is used for improving the signal processing effect, and meanwhile shortening the actual working times of the ultrasonic transmitters and the ultrasonic receivers, effectively prolonging the service lives of the ultrasonic transmitters and the ultrasonic receivers and stably collecting signals at multiple points to guarantee the processing accuracy. Signals detected by each path of independent thickness sensors are spliced to the thickness feature of an entire bank note to effectively improve the accuracy of judging whether the bank note is an overlapped bank note.

Description

technical field [0001] The invention relates to the technical field of financial automatic service terminals, in particular to a through-beam ultrasonic module used for banknote thickness detection. Background technique [0002] In order to ensure accurate counting of processed banknotes in cash processing equipment (banknote counting machines, recycling machines, sorting machines, etc.), a thickness detection device is equipped. The function of the thickness detection device in cash processing equipment is to detect the thickness of sheet media. That is, the thickness of banknotes. Obtaining the thickness of banknotes can not only be used to judge whether it conforms to the characteristics of real banknotes, but also can ensure the accuracy of counting when banknotes are separated and transmitted, judge whether there are duplicate sheets, and provide quantitative and Qualitative banknotes provide security. [0003] The current cash processing equipment generally uses preci...

AI Technical Summary

Problems solved by technology

[0003] The current cash processing equipment generally uses precision sensors such as eddy current type, Hall type, and photoelectric type for detection, and precision sensors generally have a small detection range, and the accuracy requirements for thickness detection mechanisms are very high in applications.

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