CN201111203Y - Paper currency watermark identifying apparatus with photo-electric sensor - Google Patents
Paper currency watermark identifying apparatus with photo-electric sensor Download PDFInfo
- Publication number
- CN201111203Y CN201111203Y CNU2007201200354U CN200720120035U CN201111203Y CN 201111203 Y CN201111203 Y CN 201111203Y CN U2007201200354 U CNU2007201200354 U CN U2007201200354U CN 200720120035 U CN200720120035 U CN 200720120035U CN 201111203 Y CN201111203 Y CN 201111203Y
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- Prior art keywords
- watermark
- false
- signal
- silicon photocell
- bank note
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Abstract
Disclosed is a banknote watermark counterfeit detection device having a photoelectric sensor, which comprises a purple light source (101), a color filter (102), a silicon photocell (103) and a signal processing circuit (20); and the purple light source (101) emits purple light to the watermark of the paper money to be detected, the reflecting light waves of the purple light are absorbed by the silicon photocell (103) after being filtered by the color filter (102), the silicon photocell (103) transfers the light signal into an electric signal, and the signal processing circuit (20) receives the electric signal output by the silicon photocell (103) and conducts the quantitative analysis to the electric signal so as to distinguish counterfeited watermark of the paper money to be detected. The color filter (102) is a narrow band filter with the central wavelength of 330 nanometers. The currency detector adopting the utility model can distinguish counterfeited bank note watermark, therefore the omitted and false distinguishing rate of the currency detector can be effectively reduced.
Description
Technical field
The utility model relates to a kind of device of the identification note true and false, relates in particular to a kind of bank note watermark false-identifying device with electro-optical pickoff.
Background technology
At present, the anti-counterfeiting characteristic that world's banknote is taked be magnetic printing ink, safety line, infrared printing ink, fluorescent ink, watermark, intaglio plate printing etc., wherein anti-counterfeiting characteristics such as magnetic ink, safety line, infrared printing ink, fluorescent ink can be by its true and false of machine-readable identification.And a very important the anti-counterfeiting characteristic----watermark that nearly all in the world banknote all adopts is false proof, up to the present is still and with the naked eye recognizes its true and false, still can't be by machine-readable its true and false of recognizing.Thereby on the point, cash inspecting machine there be currently used false distinguishing mode: false distinguishing mode such as magnetic, safety line, infrared, fluorescence.Wherein magnetic false distinguishing principle of work is to adopt Magnetic Sensor to collect and record the magnetic signal at magnetic position on the genuine notes, and converts thereof into electric signal, distinguishes after amplification and comparison process; Safety line false distinguishing principle of work is to adopt the safety line sensor to collect and record the material and the enciphered message of safety line on the genuine notes, and converts thereof into electric signal, distinguishes after amplification and comparison process; Infrared false distinguishing principle of work is to have adopted infrared sensor to collect and record the light characteristic that infrared printing printing ink is shown in the specific region on the genuine notes under the infrared excitation of specific wavelength, and converts thereof into electric signal, distinguishes after amplification and comparison process; It is stronger that fluorescence false distinguishing principle of work is that the purple light that adopts violet source to send shines on the counterfeit money fluorescence reflection, fluorescence reflects more weak this physical characteristics on the genuine notes and shine, collect and record the reflected fluorescent light of counterfeit money, and convert thereof into electric signal, after amplification and comparison process, distinguish.Along with the raising of counterfeit money manufacturing technology, the fidelity of counterfeit money strengthens in recent years, adopts the leakage of the discriminating machine for fake RMB of above several false distinguishing modes to distinguish rate and distinguish that rate just progressively improves by mistake, can not adapt to the needs of current identification counterfeit money fully.
The utility model content
The purpose of this utility model is, a kind of device that can check out the banknote truth/false of watermark is provided.
To achieve these goals, bank note watermark false-identifying device of the present utility model comprises: violet source, color filter, silicon photocell and signal processing circuit;
Described violet source is partly launched purple light to the watermark of bill to be tested, the reflecting light of this purple light is absorbed by described silicon photocell after described color filter filters, described silicon photocell converts light signal to electric signal, and described signal processing circuit receives the electric signal of described silicon photocell output and this electric signal is carried out quantitative analysis to identify the true and false of bill watermark to be tested.Described signal processing circuit comprises: signal amplification circuit and the single-chip microcomputer that amplified signal is handled.Described single-chip microcomputer judges it is that the counterfeit money signal will send alerting signal and described cash inspecting machine is quit work through operational analysis.
By above technical scheme, described violet source will be sent purple light to the watermark partial reflection that is verified banknote, and the purple light of reflection enters described silicon photocell by described optical filter.Described silicon photocell produces different voltage signals according to the different light intensity and the frequency of incident light.This voltage signal is delivered to single-chip microcomputer by the signal amplification circuit processing and amplifying and is handled computing, and analyzes the true and false that this is verified the watermark of banknote.
According to the reflection characteristic of bill watermark to purple light, it is the narrow band pass filter of 330 nanometers that described color filter adopts centre wavelength.Described violet source, silicon photocell and color filter are set at an optic/electro converter box the inside, and this optic/electro converter box is positioned at cash inspecting machine and crosses on the paper money plate.Described signal amplification circuit comprises first discharger and second amplifier that connects successively.The operating voltage of described watermark false distinguishing unit is 5 volts of direct currents.
Compare with prior art, the advantage of the utility model device is, a kind of device that can check out the banknote truth/false of watermark is provided, can have carried out the discriminating of the true and false to the watermark of banknote, the leakage of therefore adopting the utility model device will help further to reduce cash inspecting machine is distinguished rate and is distinguished rate by mistake.
Description of drawings
Fig. 1 is the principle schematic of a kind of bank note watermark of the utility model false-identifying device;
Fig. 2 is the structural representation of a kind of bank note watermark of the utility model false-identifying device;
Fig. 3 is the signal processing circuit synoptic diagram of a kind of bank note watermark of the utility model false-identifying device.
Embodiment
As shown in Figure 1, the watermark false-identifying device that the utility model is new comprises: the violet source 101 of partly launching the purple light light wave to the watermark that is verified banknote; Be arranged on the described optical path of violet light that is verified banknote reflection, be used to receive the silicon photocell 103 of the purple light that is verified the banknote reflection;
At described silicon photocell 103 and the described color filter 102 that is provided with between the banknote that is verified, it is the narrow band pass filter of 330 nanometers that described color filter 102 adopts centre wavelength.
Be connected with described silicon photocell 103, be used for detecting and handling silicon photocell 103 voltage changes, be used to judge the signal processing circuit 20 of truth/false of watermark.
Described signal processing circuit 20 comprises: signal amplification circuit 30 and the single-chip microcomputer 40 that amplified signal is handled.
Described violet source 101, silicon photocell 103 and color filter 102 are set at optic/electro converter box 10 the insides.
As shown in Figure 2 and described violet source 101 light paths over against the position be cash inspecting machine cross paper money plate 50; The described banknote that is verified is placed on described the mistake on the paper money plate 50.In order further to improve the reliability of the bank note watermark false-identifying device that the utlity model has electro-optical pickoff, should guarantee the height between the paper money paper and optic/electro converter box on the paper money plate, the purple light that described violet source 101 is sent just in time shines the watermark part of paper money paper and can reflex to color filter 102 in the described optic/electro converter box 10.
When paper money plate 50 was close at the watermark position that is verified banknote by described watermark false-identifying device below; the purple light that described violet source 101 is sent out shines and is verified banknote watermark position and reflexes on the described color filter 102 and be filtered; receive and be converted to electric signal through silicon photocell 103 again; this electric signal carries out quantitative analysis through signal processing circuit 20; make and adopt cash inspecting machine of the present utility model can allow the bank note watermark signal be that genuine bank note passes through, shut down and the bank note watermark signal is reported to the police for other false bank note.
As shown in Figure 3, described signal processing circuit 20 comprises by operational amplifier U1, resistance R 1, R2, R3, R4, R5 capacitor C 1, C2, C3, C4, the two-stage amplifying circuit that adjustable potentiometer VR1 forms, first order discharger U1A and second level amplifier U1B carry out delivering to single-chip microcomputer 40 after high power is amplified and carry out signal Processing.
Claims (6)
1. the bank note watermark false-identifying device with electro-optical pickoff is characterized in that comprising: violet source (101), color filter (102), silicon photocell (103) and signal processing circuit (20);
Described violet source (101) is partly launched purple light to the watermark of bill to be tested, the reflecting light of this purple light is absorbed by described silicon photocell (103) after described color filter (102) filters, described silicon photocell (103) converts light signal to electric signal, and described signal processing circuit (20) receives the electric signal of described silicon photocell (103) output and this electric signal is carried out quantitative analysis to identify the true and false of bill watermark to be tested.
2. bank note watermark false-identifying device according to claim 1 is characterized in that: described signal processing circuit (20) comprising: signal amplification circuit (30) and the single-chip microcomputer (40) that the signal amplified signal is handled.
3. bank note watermark false-identifying device according to claim 1 is characterized in that, it is the narrow band pass filter of 330 nanometers that described color filter (102) adopts centre wavelength.
4. according to claim 1,2 or 3 described bank note watermark false-identifying devices, it is characterized in that: described violet source (101), silicon photocell (103) and color filter (102) are set at an optic/electro converter box (10) the inside, and this optic/electro converter box (10) is positioned at cash inspecting machine and crosses on the paper money plate (50).
5. bank note watermark false-identifying device according to claim 2 is characterized in that, described signal amplification circuit (30) comprises first order discharger (U1A) and the second level amplifier (U1B) that connects successively.
6. according to claim 1,2 or 3 described bank note watermark false-identifying devices, it is characterized in that the operating voltage of described watermark false distinguishing unit is 5 volts of direct currents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201200354U CN201111203Y (en) | 2007-05-08 | 2007-05-08 | Paper currency watermark identifying apparatus with photo-electric sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201200354U CN201111203Y (en) | 2007-05-08 | 2007-05-08 | Paper currency watermark identifying apparatus with photo-electric sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201111203Y true CN201111203Y (en) | 2008-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201200354U Expired - Fee Related CN201111203Y (en) | 2007-05-08 | 2007-05-08 | Paper currency watermark identifying apparatus with photo-electric sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201111203Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354411A (en) * | 2011-09-30 | 2012-02-15 | 魏伟 | Paper money recognition device |
| CN103578175A (en) * | 2012-07-20 | 2014-02-12 | 辽宁聚龙金融设备股份有限公司 | Note watermark detecting module |
-
2007
- 2007-05-08 CN CNU2007201200354U patent/CN201111203Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354411A (en) * | 2011-09-30 | 2012-02-15 | 魏伟 | Paper money recognition device |
| CN103578175A (en) * | 2012-07-20 | 2014-02-12 | 辽宁聚龙金融设备股份有限公司 | Note watermark detecting module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080903 Termination date: 20160508 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |