Method for detecting adhesive tape at edge of banknotes

Abstract

The invention provides a method for detecting an adhesive tape at the edge of banknotes, which comprises the steps of acquiring banknote thickness detection data of thickness sensors in n channels when the banknotes are detected, and finding out a start position and an end position in the banknote thickness detection data; respectively calculating the banknote thickness detection data, and calculating a mean value of an oscillation area near the start position and the end position of each piece of banknote thickness detection data; sorting the mean values, and using a mean value of the mean values locating at the middle positions of the sorting sequence to act as a reference mean value; and judging whether each piece of banknote thickness detection data is greater than the reference mean value and exceeds a set value or not, if so, judging there is an adhesive tape at the edge of the banknote in the channel and alarming, if not, ignoring. Compared with the prior art, the method detects an adhesive tape at the edge of the banknotes, is not only high in judgment accuracy but also simple in detection and improves the detection efficiency.

Description

technical field [0001] The invention relates to the technical field of paper money inspection, in particular to a paper money edge tape detection method. Background technique [0002] The banknotes in circulation may have adhesive tape or other foreign matter on the surface due to various reasons. During the process of counting and checking banknotes, these banknotes with adhesive tape or foreign matter will affect the normal judgment of banknotes. In addition, there are still some spliced ​​banknotes realized by adhesive tape on the market. Such counterfeit banknotes also need financial equipment to detect such banknotes and be recycled or rejected by financial institutions. [0003] In the existing banknote tape detection, the banknote tape is generally discriminated by improving the sensor characteristics (enhancing the consistency of the sensors of each channel and reducing the oscillation of the sensor), by increasing the sensitivity, etc., and obtaining the vibration o...

AI Technical Summary

Problems solved by technology

[0003] In the existing banknote tape detection, the banknote tape is generally discriminated by improving the sensor characteristics (enhancing the consistency of the sensors of each channel and reducing the oscillation of the sensor), by increasing the sensitivity, etc., and obtaining the vibration of the tape area in the thickness detection data. In order to judge whether there is tape, this method often ignores the tape on the edge of the banknote, so that only the tape on the banknote can be detected

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