Apparatus for discriminating paper-like sheets and method for discriminating same

Abstract

A paper sheet identifying device and an identifying method can accurately judge whether a paper currency is true or false. The paper sheet identifying device is provided with a true-false judging part (C) which consists of a figure detection mechanism which detects the transparent light quantity figure of a regulated irradiating ray (X) by irradiating infrared light at the regulated irradiating ray (X) towards the inserting direction of an inserted paper sheet (M) by regulated interval, a calculation processing mechanism which contrasts the transparent light quantity figure obtained by the figure detection mechanism and the transparent light quantity figure of a real paper sheet (MA) obtained by the figure detection mechanism in advance to standardize and obtain a standard value (S) of each irradiated point (P) of the inserted paper sheet (M), and a judging mechanism which judges the inserted paper sheet (M) is a false ticket when the standard value (S) is compared with a maximum standard value (Tmax) of the real paper sheet (MA) which is obtained in advance, and a value that the standard value (S) is more than the maximum standard value (Tmax) reaches a regulated value.

Description

technical field [0001] The present invention relates to a paper leaf identification device and identification method, and particularly relates to a paper leaf identification device and identification method capable of accurately judging authenticity regardless of the state of a banknote. Background technique [0002] In recent years, the paper identification device for inserting paper leaves such as banknotes generally consists of an insertion detection unit, a transport unit, and a authenticity judgment unit. The authenticity of the inserted paper leaves is determined by the authenticity judgment unit. , using a magnetic sensor or an optical sensor to extract its features from a magnetic or optical perspective. [0003] Among them, for the judgment of the authenticity of the paper leaf by the transmissive sensor, the light-emitting element and the photosensitive element are arranged at a predetermined interval, the paper leaf is transported between them, and the light and d...

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Problems solved by technology

[0008] However, according to the above proposal, because the boundary between the normal pattern part and the watermark part is very blurred, it is not clear whether the maximum penetration level of the normal pattern part enters the normal pattern part or the watermark part

As a result, the benchmark penetration level itself becomes unstable

In addition, even if the reference transmission level can be temporarily determined, in order to determine its position, it is sometimes necessary to carefully scan the entire banknote with the sensor, and it is sometimes difficult to process it in a short time.

[0009] On the other hand, in the latter proposal, the newly added seal and the like are pressed on the banknote by a person, so as the entire pattern including the seal and the like, when the new banknote is seen and observed, there is no difference between the new banknote or the old and new banknotes. There will inevitably be deviations between them, and sometimes it is not necessary to use sensors for identification, so it does not conform to reality

Furthermore, in these two proposals, as an unconceived content, depending on the conditions at the time of banknote printing, even if there are very few differences between the original notes, there may be deviations such as printing misalignment. In recent years, extremely sophisticated and ingenious It is possible for counterfeiters to take advantage of this

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