Driving circuit of color changing ink recognition device in currency count machine

Abstract

The invention provides a driving circuit of a color changing ink recognition device in a currency count machine. The driving circuit comprises a CIS (Contact Image Sensor) image sensor, a CIS image signal analog-digital conversion module, a CIS image signal preprocessing module, a CIS control signal generator, an LED (Light Emitting Diode) driver, an LED control signal generator and an image signal processor system, wherein the CIS image sensor is used for acquiring images of paper currency at two reflecting angles; the CIS image signal preprocessing module is used for preprocessing a signal output by the CIS image signal analog-digital conversion module; the LED control signal generator is used for generating a control signal of an LED and applying the control signal to the LED driver; the CIS control signal generator is used for outputting a time sequence control signal to the CIS image signal analog-digital conversion module; and the image signal processor system is used for processing a CIS image signal processed by the CIS image signal preprocessing module to acquire two paper currency images so as to identify authenticity of the paper currency.

Description

technical field [0001] The invention belongs to the field of banknote counters, and in particular relates to a driving circuit of a color-changing ink identification device in a banknote counter. Background technique [0002] With the development of the economy, currency circulation has become more and more frequent, and counterfeiters have become more and more rampant. The counterfeit money produced by counterfeiters using high-tech technology is very realistic, such as machine-made counterfeit money with serial numbers beginning with HD90. [0003] In the process of researching the anti-counterfeiting of banknotes, the inventor found that when the ink in some areas on the real banknotes was observed at an angle of 20 degrees to 70 degrees, the color of the patterns or numbers would change, for example, in On the 100 yuan banknote, the color of the word "100" in the lower left corner of the front is different when viewed from different angles, and counterfeit banknotes are...

AI Technical Summary

Problems solved by technology

[0003] In the process of researching the anti-counterfeiting of banknotes, the inventor found that when the ink in some areas on the real banknotes is observed at an angle of 20 degrees to 70 degrees, the color of the pattern or number will change, for example, in the On the 100 yuan banknote, the color of the word "100" in the lower left corner of the front is different when viewed from different angles, and the counterfeit currency is still unable to imitate here

[0004] Based on this discovery, it is currently possible to manually shake the angle of the banknotes and observe the pattern and color of the banknotes from different angles with the naked eye to judge the authenticity of the banknotes. However, this method of manually checking the authenticity of banknotes is very time-consuming and expensive. It is laborious, especially for banks and other institutions with frequent currency processes and huge amounts, the time and energy spent on this inspection method cannot be tolerated

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