CN1277242C - Fluorescent false proof detection device and method thereof - Google Patents
Fluorescent false proof detection device and method thereof Download PDFInfo
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- CN1277242C CN1277242C CNB031404057A CN03140405A CN1277242C CN 1277242 C CN1277242 C CN 1277242C CN B031404057 A CNB031404057 A CN B031404057A CN 03140405 A CN03140405 A CN 03140405A CN 1277242 C CN1277242 C CN 1277242C
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- secret mark
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- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
The present invention relates to a fluorescent anti-counterfeiting checking device which composed of a light source, a photoelectric detector and a signal processing device. The present invention is characterized in that the photoelectric detector comprises a photoelectric sensor used for detecting fluorescent secret mark signals and a corresponding optical filter set thereof and a photoelectric sensor used for detecting fluorescence signals sent by paper base characteristic, and a corresponding optical filter set therefore, wherein both of each photoelectric sensor and the corresponding optical filter set are arranged in a shielding shell body. Because the present invention slickly utilizes a set of device to simultaneously detect and carry out differential processing to the fluorescence of paper characteristic fluorescence and fluorescent secret marks for obtaining the ratio of the fluorescence of paper characteristic fluorescence and fluorescent secret marks, the ratio can be used for judging the authenticity of banknote; because the difference of forged banknote and true banknote can be visibly enhanced after that two differencing is carried out to two indexes of forged banknote and true banknote, the reliability of judging results is enhanced, and therefore, the accuracy and the reliability of banknote authenticity detection through the present invention is greatly enhanced. The present invention has the advantages of simple structure, easy realization and low cost.
Description
Technical field
The present invention relates to be used for determining the apparatus and method of object authenticity, the fluorescence falsification preventing feature that particularly relates to financial currencies such as utilizing various securities, banknote, credit card is come the apparatus and method of this object authenticity of automatic gauging.
Background technology
In modern society, adopt various traditional methods to carry out the transaction of goods and service, but there are many individual or entities to wish wheel and deal by forging article or currency, particularly various securities, banknote, the forgery of financial currencies such as credit card is a frequent problem that takes place, especially along with scientific and technological progress such as colored printing and reproduction technology, pseudo-technology for making is also more and more advanced, for example existing counterfeit money has also possessed the uvioresistant fluorescence reaction with paper, even the fluorescence secret mark arranged also, and the wavelength of the light that its light change effect sends is near genuine notes, make the pseudo-effect of inspection of traditional detection method undesirable, the result who judges is unreliable, therefore is used for preventing that by detecting counterfeit money method and the device forged also must be advanced more.At the problems referred to above, disclose a kind of among the Chinese patent CN1141682A by measuring papery U
vReflection or two indications of fluorescence increase the cash inspecting machine that it examines pseudo-reliability, but it is vulnerable to the influence of problems such as banknote pollution and light source, sensor are aging, and the accuracy of its judged result is undesirable, and its structure and solution is too loaded down with trivial details, realize that difficulty is big.Chinese patent CN1402862A also discloses a kind of the banknote inspection fake method of measuring fluorescence, it mainly is that light source is used instead and can be sent the influence that ultraviolet light emitting diode (LED) is used to improve the volume of product and reduces surround lighting, its key is the solution of ambient light interference, promptly use the mode of switch light source, when opening, measures light source fluorescence (containing surround lighting), when closing, surveys light source surround lighting, subtract second measured value to obtain a fluorescent value more accurately with first measured value then, but there is owing to only survey the fluorescent value of simple fluorescence secret mark, forgery level because of existing counterfeit money is more and more higher as previously mentioned, the wavelength of the light that the light change effect of its fluorescence secret mark is sent is very near genuine notes, and therefore the method for the fluorescent value of simple measurement fluorescence secret mark is subjected to certain restriction and the pseudo-accuracy of influence inspection as the accuracy of judging true and false banknote, reliability.
Summary of the invention
The objective of the invention is problem at above-mentioned existence, provide a kind of measure the fluorescence of papery fluorescence and fluorescence secret mark pattern simultaneously and it carried out difference processing obtain both ratios, thereby utilize its ratio to distinguish true and false banknote reliably, effectively improve reliability, the accuracy of differentiating the result, and it is not subjected to the verifying attachment and the method for simple in structure, exquisite, fluorescence falsification preventing that cost is low of the interference of surround lighting.
Technical scheme of the present invention is achieved in that
A kind of fluorescent anti-falsification inspecting device, comprise and to produce arrowband or broad band light beam and it is shone at least one light source on the anti-counterfeiting characteristic of examined object, detect the photoelectric detection system of at least two light beams of reflection on the anti-counterfeiting characteristic of examined object or transmission from different perspectives, each signal of photoelectric detection system is carried out the signal processing apparatus of analyzing and processing, be characterized in: photoelectric detection system comprises photoelectric sensor and the photoelectric sensor of corresponding filter set and the fluorescence signal that paper substrate sent that at least one detects examined object and the filter set of correspondence thereof of the fluorescence secret mark signal that the fluorescence secret mark part at least one detection examined object is sent, and wherein each photoelectric sensor and corresponding filter set thereof are all installed in a screen closed shell body.When product structure is enough to cause surround lighting (mainly referring to use the natural light or the artificial light source of environment) effectively to be closed by screen and when the interference of photoelectric detection system can be ignored, said signal processing device comprises that mainly one can calculate the fluorescence ratio that the fluorescence secret mark signal that detects and fluorescence signal carry out division and comparison operation and export result of determination and relatively judging circuit and corresponding warning circuit.
Wherein, for effectively reducing the interference of surround lighting, further improve the accuracy and the reliability of judged result, above-mentioned photoelectric detection system comprises that also at least one can detect the photoelectric sensor and the filter set thereof of the ambient light intensity reference signal that surround lighting sent on the examined object.At this moment, said signal processing device also includes ambient light interference amount that can detect photoelectric detection system and the surround lighting means for correcting of being proofreaied and correct, this surround lighting means for correcting comprise one include two dividers and one as a result the frequency spectrum ratio of latch produce circuit, respectively the detected signal of photoelectric sensor of the photoelectric sensor of the photoelectric sensor of fluorescence secret mark signal and fluorescence signal and ambient light intensity reference signal is carried out two subtracters of subtraction process, respectively to fluorescence secret mark signal, two peaking circuits that fluorescence signal is handled and to the surround lighting reference signal handle to obtain the correction value generating circuit of fluorescence secret mark signal correction value and fluorescence signal modified value.
A kind of method of fluorescence falsification preventing check may further comprise the steps:
(1), chooses one and can send the ultraviolet light-emitting diode (LED) of the ultraviolet light that is fit to intensity or mercury purple light pipe arrives examined object as light source irradiation fluorescence secret mark part and non-fluorescence secret mark part thereof;
(2), at least two photoelectric sensors and the corresponding filter set thereof of use device in shield shell picked up fluorescence secret mark signal and the fluorescence signal that fluorescence secret mark part on the examined object and its paper substrate are sent respectively;
(3), the fluorescence secret mark signal that picks up and fluorescence signal being delivered to signal processing apparatus carries out division and comparison operation and exports result of determination and corresponding alarm signal and control signal.
For further improving the accuracy of judged result, effectively eliminate the interference of surround lighting, step (1) is preceding to be utilized the ambient light interference component of the photoelectric sensor that surround lighting with definite frequency spectrum ratio and ambient light intensity reference signal detect fluorescence secret mark signal and fluorescence signal earlier and is proofreaied and correct and preserve its result carrying out.Carry out to include earlier after the step (2) peaking circuit that the fluorescence secret mark composite signal of ambient light interference component and fluorescence composite signal and fluorescence secret mark modified value thereof and fluorescence modified value deliver to respectively separately and carry out signal correction to obtain fluorescence secret mark signal and fluorescence signal.
Describe composition of the present invention and implementation method and principle of work in detail below in conjunction with accompanying drawing:
Description of drawings
Fig. 1 is that structure of the present invention is formed synoptic diagram;
Fig. 2 is the structural representation of photoelectric detection system of the present invention;
Fig. 3 is the block scheme of signal processing apparatus of the present invention;
Fig. 4 is the block scheme of another embodiment of signal processing apparatus of the present invention;
Fig. 5 is a processing flow chart of the present invention.
Embodiment
As Fig. 1～shown in Figure 4, the present invention includes and to produce arrowband or broad band light beam and it is shone at least one light source 7 on the anti-counterfeiting characteristic of examined object, detect the photoelectric detection system of at least two light beams of reflection on the anti-counterfeiting characteristic of examined object or transmission from different perspectives, each signal of photoelectric detection system is carried out the signal processing apparatus of analyzing and processing, be characterized in: photoelectric detection system comprises photoelectric sensor 101 and the photoelectric sensor 301 of corresponding filter set 601 and the fluorescence signal that paper substrate sent that at least one detects examined object and the filter set 603 of correspondence thereof of the fluorescence secret mark signal that the fluorescence secret mark part at least one detection examined object is sent, and wherein each photoelectric sensor and corresponding filter set thereof are all installed in a screen closed shell body 5.When product structure is enough to cause surround lighting (mainly referring to use the natural light or the artificial light source of environment) effectively to be closed by screen and when the interference of photoelectric detection system can be ignored, said signal processing device comprises that mainly one can calculate the fluorescence ratio that the fluorescence secret mark signal that detects and fluorescence signal carry out division and comparison operation and export result of determination and relatively judging circuit 401 and corresponding warning circuit.
Wherein, for effectively lacking the interference of surround lighting, further improve the reliability and the accuracy of judged result, above-mentioned photoelectric detection system comprises that also at least one can detect the photoelectric sensor 201 and the filter set 602 thereof of the ambient light intensity reference signal that surround lighting sent on the examined object.At this moment, said signal processing device also includes ambient light interference amount that can detect photoelectric detection system and the surround lighting means for correcting of being proofreaied and correct, this surround lighting means for correcting comprise one include two dividers and one as a result the frequency spectrum ratio of latch produce circuit 202, respectively the detected signal of photoelectric sensor of the photoelectric sensor of the photoelectric sensor of fluorescence secret mark signal and fluorescence signal and ambient light intensity reference signal is carried out two subtracters 102 and 302 of subtraction process, respectively to fluorescence secret mark signal, two peaking circuits 103 that fluorescence signal is handled, 303 and to the surround lighting reference signal handle to obtain the correction value generating circuit 203 of fluorescence secret mark signal correction value and fluorescence signal modified value.Signal processing apparatus also can be simplified the circuit part of present embodiment as shown in Figure 4 with micro processor.Above-mentioned fluorescence ratio calculates with the comparison discriminating gear and includes signal amplification circuit, A/D modular converter that is connected in regular turn and the central processing unit CPU that can handle and export judged result to the signal after the conversion.Promptly after photoelectric sensor 101,201,301 output signals, by a signal amplifier signal is amplified to enough intensity, by being imported among the CPU after the A/D conversion, can finish Signal Processing easily again by one section program of CPU operation, and the output result of determination.
A kind of method of fluorescence falsification preventing check may further comprise the steps:
(1), chooses one and can send the ultraviolet light-emitting diode (LED) of the ultraviolet light that is fit to intensity or mercury purple light pipe arrives examined object as light source irradiation fluorescence secret mark part and non-fluorescence secret mark part thereof;
(2), at least two photoelectric sensors and the corresponding filter set thereof of use device in shield shell picked up fluorescence secret mark signal and the fluorescence signal that fluorescence secret mark part on the examined object and its paper substrate are sent respectively;
(3), the fluorescence secret mark signal that picks up and fluorescence signal being delivered to signal processing apparatus carries out division and comparison operation and exports result of determination and corresponding alarm signal and control signal.
Carrying out the preceding utilization earlier of step (1) has the ambient light interference component of the surround lighting of definite frequency spectrum ratio and the photoelectric sensor that the ambient light intensity reference signal detects fluorescence secret mark signal and fluorescence signal and is proofreaied and correct and preserve its result.After carrying out step (2), will include the peaking circuit that the fluorescence secret mark composite signal of ambient light interference component and fluorescence composite signal and fluorescence secret mark modified value thereof and fluorescence modified value deliver to respectively separately earlier and carry out signal correction to obtain fluorescence secret mark signal and fluorescence signal.
Describe the course of work of the present invention in detail according to embodiment below and principle of work is: when no ticket, the photoelectric sensor of photoelectric detection system for example fluorescent optical sensor 101, surround lighting monitoring sensor 201, fluorescence secret mark sensor 301 its output signals is surround lighting, the signal of the selected wavelength of respective filter is assumed to: d on the object to be detected
101(400～700nm), d
201(600～700nm), d
301(500～700nm), d wherein
101, d
301Also be the undesired signal when having ticket to detect, can constantly change with different detections.
Signal d
101, d
201Transported in the circuit 102, circuit 102 is identical with 302 structures, is mainly a subtracter.Signal d
101, d
201Processing mathematic(al) representation in circuit is:
d
101-d
201＝d
1｀
Same, signal d
301, d
201Be sent in the circuit 302, the mathematic(al) representation of its processing is:
d
301-d
201＝d
3｀
Signal d
1｀ is the band signal of 400～600nm in the surround lighting content.d
3｀ is the signal that the 500-600nm wave band produces in the surround lighting content.d
1｀, d
3｀ is sent to respectively in the circuit 202, and 202 are that the frequency spectrum ratio produces circuit, mainly comprises 2 dividers and latch as a result.In 202: d
1｀ and another road d
201Be divided by, expression formula is:
d
1｀/d
201＝d
1
d
3｀ and another road d
201Be divided by, expression formula is:
d
3｀/d
201＝d
3
Output is d as a result
1, d
3Be the environment frequency spectrum ratio under this environment for use.We know by the front, and Different Light has different frequency spectrum ratios, but same light source has definite frequency spectrum ratio, do not change with light is strong and weak.We can draw the interference volume that arbitrary detection moment surround lighting produces easily in detecting device thus, and are proofreaied and correct.
When ticket, 102,302 to 202 signal path is cut off.Fluorescent optical sensor 101, fluorescence secret mark sensor 301 are exported the composite signal D that contains fluorescence component and surround lighting component respectively
101, D
301, monitoring sensor output environment beche-de-mer without spike is considered d
201
Composite signal D
101With d
201Be sent in the circuit 102 and handle, its processing procedure and result are:
D
101-d
201＝D
1｀
Fluorescence secret mark composite signal D
301With d
201Be sent in the circuit 302 and handle, its processing procedure and result are:
D
301-d
201＝D
3｀
Because the signal path of circuit 102 to 202, circuit 302 to 202 is cut off, thereby, D
1｀ and D
3｀ can not be sent to the frequency spectrum ratio and produce in the circuit, only can be sent in peaking circuit 103 and 303.Circuit 103,303 mainly also is to be made of subtracter.
And another road environment reference quantity signal d
201Be sent in 203.Circuit 203 is a correction value generating circuit, mainly contains No. 2 multipliers and constitutes.In circuit 203, environment reference quantity d
201Produce the ratio d that latchs in the latch as a result in the circuit 202 from the frequency spectrum ratio with another road
1, d
3Multiply each other respectively, that is:
d
201×d
1＝D
1k
d
201×d
3＝D
3k
Obtain fluorescence modified value D
1K, fluorescence secret mark modified value D
3K.D
1K and D
3K also is sent in the peaking circuit 103,303 respectively and signal D
1｀ and D
3｀ subtracts each other and obtains fluorescent value D
1With fluorescence secret mark signal D
3In 103 and 303, the signal Processing expression formula is:
D
1｀-D
1k＝D
1
D
3｀-D
3k＝D
3
Fluorescence signal D
1T and fluorescence secret mark signal D
3Be sent at last in the circuit 401, this circuit is made of a divider and comparer, is used to calculate the ratio of fluorescence signal and fluorescence signal, that is is that authenticity of banknotes is judged.D
1, D
3Relatively, its result and a threshold voltage of setting compare in comparer.If the result, shows then that this ticket is for false greater than threshold value.The output of result of determination can be that sound or light are expressed.As red light is that puppet, green light are for true.
In sum, the present invention obtains its ratio owing to utilizing a covering device to detect the fluorescence of papery fluorescence and fluorescence secret mark simultaneously and it is carried out difference processing dexterously, and can cross the true and false that this ratio is judged banknote, although owing to approach genuine notes as the counterfeit money anti-fluorescent paper of using and its effect of paper of doing fluorescent quenching, though but its fluorescence generally has than the spectral component of the fluorescence secret mark of big trend of genuine notes paper and the counterfeit money fluorescence secret mark near genuine notes, a little less than generally all wanting; Therefore when two indications being carried out single the processing, be difficult to reliably distinguish both true and falses, but after two indexs are carried out difference, its difference then can significantly improve, thereby promoted the reliability of result of determination, therefore the accuracy and reliability of the true and false degree by the paper money paper that the present invention detected greatly improves, and it is simple in structure, it is easy, with low cost to realize.
Claims (7)
1, a kind of fluorescent anti-falsification inspecting device, comprise and to produce arrowband or broad band light beam and it is shone at least one light source (7) on the anti-counterfeiting characteristic of examined object, detect the photoelectric detection system of at least two light beams of reflection on the anti-counterfeiting characteristic of examined object or transmission from different perspectives, each signal of photoelectric detection system is carried out the signal processing apparatus of analyzing and processing, it is characterized in that: photoelectric detection system comprises photoelectric sensor (101) and the photoelectric sensor of corresponding filter set (601) and the fluorescence signal that paper substrate sent that at least one detects examined object and the filter set (603) of correspondence thereof of the fluorescence secret mark signal that the fluorescence secret mark part at least one detection examined object is sent, wherein each photoelectric sensor and corresponding filter set thereof are all installed in a screen closed shell body (5), and described signal processing apparatus comprises that one can calculate the fluorescence ratio that the fluorescence secret mark signal that detects and fluorescence signal carry out division and comparison operation and export result of determination and relatively discriminating gear (401) and corresponding warning circuit.
2, fluorescent anti-falsification inspecting device according to claim 1 is characterized in that photoelectric sensor (201) and filter set (602) thereof that above-mentioned photoelectric detection system comprises that also at least one can detect the ambient light intensity reference signal that surround lighting sent on the examined object.
3, fluorescent anti-falsification inspecting device according to claim 2, it is characterized in that said signal processing device also includes ambient light interference amount that can detect photoelectric detection system and the surround lighting means for correcting of being proofreaied and correct, this surround lighting means for correcting comprise one include two dividers and one as a result the frequency spectrum ratio of latch produce circuit (202), respectively the detected signal of photoelectric sensor of the photoelectric sensor of the photoelectric sensor of fluorescence secret mark signal and fluorescence signal and ambient light intensity reference signal is carried out two subtracters (102 of subtraction process, 302), respectively to fluorescence secret mark signal, two peaking circuits (103 that fluorescence signal is handled, 303) and the surround lighting reference signal is handled to obtain the correction value generating circuit (203) of fluorescence secret mark signal correction value and fluorescence signal modified value.
4, fluorescent anti-falsification inspecting device according to claim 1 is characterized in that above-mentioned fluorescence ratio calculating and comparison discriminating gear include signal amplification circuit, A/D modular converter that is connected in regular turn and the central processing unit CPU that can handle and export judged result to the signal after the conversion.
5, a kind of method of fluorescence falsification preventing check is characterized in that may further comprise the steps:
(1), chooses one and can send the ultraviolet light-emitting diode (LED) of the ultraviolet light that is fit to intensity or mercury purple light pipe arrives examined object as light source irradiation fluorescence secret mark part and non-fluorescence secret mark part thereof;
(2), at least two photoelectric sensors and the corresponding filter set thereof of use device in shield shell (5) picked up fluorescence secret mark signal and the fluorescence signal that fluorescence secret mark part on the examined object and its paper substrate are sent respectively;
(3), the fluorescence secret mark signal that picks up and fluorescence signal being delivered to signal processing apparatus carries out division and comparison operation and exports result of determination and corresponding alarm signal and control signal.
6, the method for fluorescence falsification preventing according to claim 5 check is characterized in that step (1) is preceding to be utilized the ambient light interference component of the photoelectric sensor that surround lighting with definite frequency spectrum ratio and ambient light intensity reference signal detect fluorescence secret mark signal and fluorescence signal earlier and proofreaied and correct and preserve its result carrying out.
7, the method for fluorescence falsification preventing according to claim 5 check is characterized in that will including earlier the peaking circuit that the fluorescence secret mark composite signal of ambient light interference component and fluorescence composite signal and fluorescence secret mark modified value thereof and fluorescence modified value deliver to respectively separately and carries out signal correction to obtain fluorescence secret mark signal and fluorescence signal after carrying out step (2).
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|---|---|---|---|
| CNB031404057A CN1277242C (en) | 2003-09-05 | 2003-09-05 | Fluorescent false proof detection device and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031404057A CN1277242C (en) | 2003-09-05 | 2003-09-05 | Fluorescent false proof detection device and method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN1523342A CN1523342A (en) | 2004-08-25 |
| CN1277242C true CN1277242C (en) | 2006-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100576231C (en) * | 2007-01-15 | 2009-12-30 | 中国科学院自动化研究所 | Image collecting device and use the face identification system and the method for this device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104422698B (en) * | 2013-09-04 | 2017-03-29 | 昆山钞票纸业有限公司 | Trailing type cheque paper positioning discharges fluorescent fiber on-line measuring device |
| JP6878093B2 (en) * | 2017-03-31 | 2021-05-26 | エイワイファーマ株式会社 | Attachment detection device and detection method |
-
2003
- 2003-09-05 CN CNB031404057A patent/CN1277242C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100576231C (en) * | 2007-01-15 | 2009-12-30 | 中国科学院自动化研究所 | Image collecting device and use the face identification system and the method for this device |
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| Publication number | Publication date |
|---|---|
| CN1523342A (en) | 2004-08-25 |
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Assignee: Guangdong Baijia Baiter Industry Co., Ltd. Assignor: Cai Yongquan Contract fulfillment period: 2006.12.1 to 2013.12.31 contract change Contract record no.: 2008440000536 Denomination of invention: Fluorescent false proof detection device and method thereof Granted publication date: 20060927 License type: Exclusive license Record date: 20081216 |
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Assignee: Guangdong Baijia Baiter Industry Co., Ltd. Assignor: Cai Yongquan Contract fulfillment period: 2006.12.1 to 2013.12.31 contract change Contract record no.: 2010440000110 Denomination of invention: Fluorescent false proof detection device and method thereof Granted publication date: 20060927 License type: Exclusive license Record date: 2010.1.12 |
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