CN101763680A - Currency detector using laser light source - Google Patents
Currency detector using laser light source Download PDFInfo
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- CN101763680A CN101763680A CN200810207895A CN200810207895A CN101763680A CN 101763680 A CN101763680 A CN 101763680A CN 200810207895 A CN200810207895 A CN 200810207895A CN 200810207895 A CN200810207895 A CN 200810207895A CN 101763680 A CN101763680 A CN 101763680A
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- light source
- laser light
- banknote
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Abstract
The invention provides a currency detector using a laser light source, which comprises a currency receiving plate, a cleaner starting tie-in, a starting sensor, a currency feeding plate, a power supply switch, one or more infrared laser, one or more visible light photosensitive element, a signal processing circuit and an executing device. The laser beam having a wavelength between 780 and 1500nm and emitted by the infrared laser is irradiated on the infrared up-conversion material false proof mark of the currency, the generated visible light is received by the photosensitive element, the light is amplified by a pre-amplifier and then the signal is operated and processed so as to identify the currency. The detector of the invention has high accuracy, simple circuit and structure, low cost and high detecting speed.
Description
Technical field
The present invention relates to a kind of banknote tester, particularly a kind of banknote tester that adopts infrared laser light source.
Background technology
Counterfeit money is disturbed normal money flow, upsets economic order, and what influence was economical, financial and social stablizes, and makes business unit and individual suffer economic loss, brings inconvenience to life.At the counterfeit money that is becoming increasingly rampant, countries in the world take appropriate measures, the currency manufacturing and false proof aspect do one's utmost, the science and technology of making every effort to use modern forefront produces more perfect, is difficult to the currency forged, protection domestic economy more.As former German mark 23 kinds of anti-counterfeiting technologies are arranged, dollar has 8 kinds of anti-counterfeiting technologies, and the 5th cover bank note of China has adopted ten big anti-counterfeiting technologies, as: photochromatic printing ink denomination numeral, magnetic microfilm of characters safety line, stealthy denomination numeral, red blue color fiber coin paper, the offset printing microfilm of characters, anyhow even numbers bar code, yin yang complementarity be to the impression case, fixedly portrait watermark, the hand engraving head portrait, intaglio ink.
But, along with the development of printing technology, reprography and electronic scanning technique, the counterfeit money manufacture level is more and more higher, and most cash inspecting machine false distinguishing levels on the market are also not high, can not pick out its true and false effectively, the high counterfeit money of some imitated precision is difficult to identification automatically.Therefore, the false distinguishing ability of raising cash inspecting machine is necessary.
Existing cash inspecting machine can be divided into two classes, just observes class and automatic class.All are observed class cash inspecting machine dependence subjective vision and do the authenticity evaluation.Automatically class then is that the automatic judgement of instrument is discerned the false from the genuine.Most automatic class cash inspecting machine also has the function of counting, that is to say that it also is a paper money counter.The anti-counterfeiting technology of various countries concentrates on special paper (comprising plastic paper) and false proof plate-making and printing at present.The detection of some cash inspecting machines is based on true and false banknote different to Ultraluminescence and infrared reflection of light and transmission.The detection of other cash inspecting machines is then based on the magnetic that true and false banknote had and the difference of optical disclour printing ink.Also have some cash inspecting machines by the scanning sampling technique, collect data, the energy that records is converted into electric signal.The data of obtaining from the genuine notes ticket are set to reference data.Any measuring-signal departs from this reference value and then is judged to be counterfeit money.And clever adulterator is just managing to duplicate the features that genuine notes had such as paper fluorescent characteristics now, makes that the difference of present counterfeit money and genuine notes is very little.Therefore carry out the judgement of authenticity, need two kinds of detection methods at least.In fact present most cash inspecting machine all is the composite type multifunctional currency detector that multiple detection method is combined.
The cash inspecting machine of present employing laser detection is after laser beam foucing is adjusted in micron order bank note pattern scanning gained data to be discerned the false from the genuine with storing genuine notes data comparison in essence.It is similar that its principle of work reads data of optical disk with DVD, and just processing procedure is different.This cash inspecting machine under present fraud technology, accuracy height, but circuit and complex structure, cost height, and detection speed is slow.
Summary of the invention
The present invention is that (infrared up-conversion material is a kind of special material to the infrared up-conversion material anti-fake mark of banknote at the laser beam irradiation that infrared laser sent of 780-1500nm (as 980nm) with wavelength, after the infrared laser beam irradiation, can produce the short visible light of wavelength ratio infrared laser wavelength), (320～700nm) receive by photosensitive device the visible light of its generation, and then amplify by pre-amplification circuit, again signal is carried out computing and handle to judge the true and false of banknote.
The object of the present invention is to provide a kind ofly, can differentiate the cash inspecting machine of true and false coin effectively based on the infrared up-conversion material security feature.
The objective of the invention is to be achieved through the following technical solutions:
A kind of banknote tester that adopts LASER Light Source, it comprises and connects the paper money platform, and suction cleaner starts joint, and start sensor is fed the paper money platform, and power switch is characterized in that, has also comprised one or more infrared laser; One or more visible light photosensitive device; Signal processing circuit; Actuating unit.
Wherein, its infrared laser wavelength is at 780-1500nm, and its frequency range is at the 0.1-100K hertz.
Wherein, its visible light photosensitive device can be a photodiode.
Wherein, its visible light photosensitive device can be a photomultiplier.
Wherein, its signal processing circuit comprises pre-amplification circuit, A/D change-over circuit, singlechip chip.
Wherein, its actuating unit comprises sound and light alarm, motor-driven, and genuine notes quantity shows.
Wherein, its LASER Light Source and visible light photosensitive device are oppositely arranged, and banknote passes through between two devices during currency examine.
Wherein, it can be provided with optical filter before photosensitive device.
Wherein, its can banknote to be measured top by the position one lens are set, the infrared beam that LASER Light Source is sent focuses on the up-conversion of banknote.
Wherein, its optical filter is excited the visible light wave range that sent for the up-conversion on the banknote, have good transmitance, and under other wave band, transmitance is very low.
Wherein, its infrared laser can be coupled with optical fiber, makes the infrared laser that is sent by Optical Fiber Transmission, this optical fiber connector and collimating apparatus coupling, and this collimating apparatus and photosensitive device are oppositely arranged.
Wherein, its infrared laser can be coupled with optical fiber, makes the infrared laser that is sent by Optical Fiber Transmission, this optical fiber other end and collimating apparatus coupling, this collimating apparatus and another collimating apparatus are oppositely arranged, and after this another collimating apparatus and the optical fiber coupling transmission of visible light that excites are passed on the photosensitive device.
Wherein, after its infrared laser and the optical fiber coupling, can optical fiber be divided into two by optical fiber bifurcated device, thereby reduce required infrared laser and photosensitive device.
Positive progressive effect of the present invention is: accuracy height of the present invention, and circuit and simple in structure, with low cost, detection speed is fast.
Description of drawings
Fig. 1 is a cash inspecting machine control system block diagram.
Fig. 2 is the principle schematic of embodiment 1.
Fig. 3 is the principle schematic of embodiment 2.
Fig. 4 is the principle schematic of embodiment 3.
Fig. 5 is the principle schematic of embodiment 4.
Fig. 6 is the principle schematic of embodiment 5.
Embodiment
With reference to the accompanying drawings, in conjunction with the embodiments the present invention is further specified.
Fig. 1 is a cash inspecting machine control system block diagram.The system test section comprises that magnetic detection, infrared laser excite visible light detection and quantity detection etc., and system's output comprises that sound and light alarm, motor-driven and quantity show.As long as bank note to be measured laterally is placed on into the paper money mouth, instrument just can be involved in bank note and detect automatically, and genuine note can spue by outlet, and shows the genuine note quantity that detects, and as cash dispensing port paper money is arranged, and then this counting is followed continuous counter last time; Do not have paper money as cash dispensing port, then this counting is done a new counting and is begun.Counterfeit money then can be reported to the police and motor stops operating.
As shown in Figure 2, the infrared beam that frequency range is sent at the infrared laser 1 of 0.1-100KHZ is (as 980nm, scope be 780-1500nm infrared light all can) focus on the infrared up-conversion material 3 on the bank note through lens 2, this material is excited, and sends visible light, the paper fibre 4 of this visible light transmissive bank note, incide on the photosensitive device 6, photosensitive device 6 changes light signal into electric signal, and then sends signal to Single Chip Microcomputer (SCM) system 7, makes the true and false by Single Chip Microcomputer (SCM) system and judges.Single Chip Microcomputer (SCM) system has comprised pre-amplification circuit, A/D change-over circuit, singlechip chip and necessary circuit.
As shown in Figure 3, because the infrared up-conversion material on the banknote is coated in the banknote one side, when the banknote another side enters cash inspecting machine up, the infrared beam that infrared laser 1 sends, after lens 2 focusing, at first pass the banknote paper fibre, shine on the infrared up-conversion material then.This material is excited, and sends visible light, and this visible light mating plate 10 after filtration filters on the back incident light sensing devices 6, this optical filter is excited the visible light wave range that sent for the up-conversion on the banknote, have good transmitance, and under other wave band, transmitance is very low.Photosensitive device 6 changes light signal into electric signal, and then sends signal to Single Chip Microcomputer (SCM) system 7, makes the true and false by Single Chip Microcomputer (SCM) system and judges.Single Chip Microcomputer (SCM) system has comprised pre-amplification circuit, A/D change-over circuit, singlechip chip and necessary circuit.
In testing process, can adopt optical fiber to come transmitting beam, so that obtain better signal.As shown in Figure 4, infrared laser 1 and optical fiber 5 couplings, optical fiber 5 other ends and collimating apparatus 8 couplings, this collimating apparatus and photosensitive device 6 are oppositely arranged, the infrared beam that laser instrument sent transmits from collimating apparatus 8 through optical fiber 5 and penetrates, shine on the infrared up-conversion material 3 on the bank note, this material is excited, send visible light, the paper fibre 4 of this visible light transmissive bank note incides on the photosensitive device 6, and photosensitive device 6 changes light signal into electric signal, and then send signal to Single Chip Microcomputer (SCM) system 7, make the true and false by Single Chip Microcomputer (SCM) system and judge.Single Chip Microcomputer (SCM) system has comprised pre-amplification circuit, A/D change-over circuit, singlechip chip and necessary circuit.
As shown in Figure 5, infrared laser 1 and optical fiber 5 couplings, optical fiber 5 other ends and collimating apparatus 8 couplings, this collimating apparatus 8 is oppositely arranged with another collimating apparatus 11, the infrared beam that laser instrument sent transmits from collimating apparatus 8 through optical fiber 5 and penetrates, shine on the infrared up-conversion material 3 on the bank note, this material is excited, send visible light, the paper fibre 4 of this visible light transmissive bank note incides on another collimating apparatus 11, be transferred on the photosensitive device 6 through the optical fiber (not shown), photosensitive device 6 changes light signal into electric signal, and then sends signal to Single Chip Microcomputer (SCM) system 7, makes the true and false by Single Chip Microcomputer (SCM) system and judges.Single Chip Microcomputer (SCM) system has comprised pre-amplification circuit, A/D change-over circuit, singlechip chip and necessary circuit.
Because bank note enters cash inspecting machine and has 4 kinds of modes, be that penetration detects and the present invention adopts, 2 groups of generating lasers and photosensitive device generally will be installed at least.And can realize only installing 1 group of generating laser and photosensitive device by optical fiber bifurcated device.
As shown in Figure 6, infrared laser 1 and optical fiber coupling, this optical fiber is connected to an optical fiber bifurcated device 9, tell optical fiber 5 and optical fiber 12, optical fiber 5,12 the other end respectively with collimating apparatus 8,13 couplings, this collimating apparatus 8,13 respectively with collimating apparatus 11,14 are oppositely arranged, the infrared beam that laser instrument sent is divided into two-beam through optical fiber bifurcated device, from collimating apparatus 8 then through Optical Fiber Transmission, 13 penetrate, on wherein a branch of infrared up-conversion material 3 that shines on the bank note, this material is excited, and sends visible light, the paper fibre 4 of this visible light transmissive bank note, incide on another collimating apparatus 11 or 14, be transferred on photosensitive device 6 or 15 through the optical fiber (not shown), photosensitive device 6 or 15 changes light signal into electric signal, and then send signal to Single Chip Microcomputer (SCM) system 7, make the true and false by Single Chip Microcomputer (SCM) system and judge.Single Chip Microcomputer (SCM) system has comprised pre-amplification circuit, A/D change-over circuit, singlechip chip and necessary circuit.
Above embodiment is used to illustrate the present invention, but the present invention is not limited thereto.Under the situation that does not deviate from principle of the present invention and claim, those skilled in the art can adopt the device of identity function or method to substitute, photosensitive device as described can be photodiode, phototriode, photomultiplier etc., as long as it is to visible light luminous sensitivity height, and infrared light is not had response or responds low getting final product.
Claims (10)
1. banknote tester that adopts LASER Light Source, it comprises and connects the paper money platform, suction cleaner starts joint, start sensor is fed the paper money platform, power switch, it is characterized in that, also comprised one or more infrared laser, one or more visible light photosensitive device, signal processing circuit and actuating unit.
2. the banknote tester of employing LASER Light Source according to claim 1 is characterized in that, its infrared laser wavelength is at 780-1500nm, and its frequency range is at 0.1-100KHZ.
3. the banknote tester of employing LASER Light Source according to claim 1 is characterized in that, its visible light photosensitive device is a photodiode.
4. the banknote tester of employing LASER Light Source according to claim 1 is characterized in that, its signal processing circuit comprises pre-amplification circuit, A/D change-over circuit, singlechip chip.
5. the banknote tester of employing LASER Light Source according to claim 1 is characterized in that, its actuating unit comprises sound and light alarm, motor-driven, and genuine notes quantity shows.
6. the banknote tester of employing LASER Light Source according to claim 1 is characterized in that, its LASER Light Source and visible light photosensitive device are oppositely arranged, and banknote passes through between two devices during currency examine.
7. the banknote tester of employing LASER Light Source according to claim 6, it is characterized in that, it can be provided with optical filter before photosensitive device, this optical filter is excited the visible light wave range that sent for the up-conversion on the banknote, has good transmitance, and under other wave band, transmitance is very low.
8. the banknote tester of employing LASER Light Source according to claim 6 is characterized in that, it can be provided with lens above by the position at banknote to be measured, and the infrared beam that LASER Light Source is sent focuses on the up-conversion of banknote.
9. the banknote tester of employing LASER Light Source according to claim 2, it is characterized in that, its infrared laser can be coupled with optical fiber, make the infrared laser that is sent pass through Optical Fiber Transmission, this optical fiber other end and collimating apparatus coupling, this collimating apparatus and another collimating apparatus are oppositely arranged, and after this another collimating apparatus and the optical fiber coupling transmission of visible light that excites are passed on the photosensitive device.
10. the banknote tester of employing LASER Light Source according to claim 9 is characterized in that, after its infrared laser and the optical fiber coupling, can optical fiber be divided into two by optical fiber bifurcated device, thereby reduce required infrared laser and photosensitive device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810207895A CN101763680A (en) | 2008-12-26 | 2008-12-26 | Currency detector using laser light source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810207895A CN101763680A (en) | 2008-12-26 | 2008-12-26 | Currency detector using laser light source |
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| CN101763680A true CN101763680A (en) | 2010-06-30 |
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| CN200810207895A Pending CN101763680A (en) | 2008-12-26 | 2008-12-26 | Currency detector using laser light source |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324131A (en) * | 2011-02-04 | 2012-01-18 | 多尔斯研发有限公司 | Device for displaying file anti-counterfeiting mark |
| CN102565011A (en) * | 2011-12-28 | 2012-07-11 | 广东恒立电子科技有限公司 | Optical sensor and detection method thereof |
| CN103311800A (en) * | 2013-06-17 | 2013-09-18 | 中国人民银行印制科学技术研究所 | Linear light source generating device and marketable bill detecting system |
| CN104392536A (en) * | 2014-09-30 | 2015-03-04 | 浙江维融电子科技股份有限公司 | Banknote management method and apparatus |
| CN105894652A (en) * | 2016-05-06 | 2016-08-24 | 苏州格兰斯柯光电科技有限公司 | Portable light-sensing currency detector with voice alarm function |
| CN105931358A (en) * | 2016-05-06 | 2016-09-07 | 苏州格兰斯柯光电科技有限公司 | Currency detector having multiple detection methods |
| CN106023410A (en) * | 2016-05-06 | 2016-10-12 | 苏州格兰斯柯光电科技有限公司 | Bayesian microscopic imaging method |
| CN106023408A (en) * | 2016-05-06 | 2016-10-12 | 苏州格兰斯柯光电科技有限公司 | Optical detector with magnetism detection function |
| CN106023411A (en) * | 2016-05-06 | 2016-10-12 | 苏州格兰斯柯光电科技有限公司 | Light-sensing banknote detector with image identification function |
| CN106842449A (en) * | 2017-02-18 | 2017-06-13 | 蚌埠市圆周率电子科技有限公司 | It is a kind of to contain the miniature FDDI FDM Fiber Duct device carved characters with pattern |
| CN107393117A (en) * | 2017-07-18 | 2017-11-24 | 杭州科凡电子有限公司 | Note detection device and detection method |
-
2008
- 2008-12-26 CN CN200810207895A patent/CN101763680A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324131A (en) * | 2011-02-04 | 2012-01-18 | 多尔斯研发有限公司 | Device for displaying file anti-counterfeiting mark |
| CN102565011A (en) * | 2011-12-28 | 2012-07-11 | 广东恒立电子科技有限公司 | Optical sensor and detection method thereof |
| CN103311800A (en) * | 2013-06-17 | 2013-09-18 | 中国人民银行印制科学技术研究所 | Linear light source generating device and marketable bill detecting system |
| CN103311800B (en) * | 2013-06-17 | 2015-07-01 | 中国人民银行印制科学技术研究所 | Linear light source generating device and marketable bill detecting system |
| CN104392536A (en) * | 2014-09-30 | 2015-03-04 | 浙江维融电子科技股份有限公司 | Banknote management method and apparatus |
| CN105894652A (en) * | 2016-05-06 | 2016-08-24 | 苏州格兰斯柯光电科技有限公司 | Portable light-sensing currency detector with voice alarm function |
| CN105931358A (en) * | 2016-05-06 | 2016-09-07 | 苏州格兰斯柯光电科技有限公司 | Currency detector having multiple detection methods |
| CN106023410A (en) * | 2016-05-06 | 2016-10-12 | 苏州格兰斯柯光电科技有限公司 | Bayesian microscopic imaging method |
| CN106023408A (en) * | 2016-05-06 | 2016-10-12 | 苏州格兰斯柯光电科技有限公司 | Optical detector with magnetism detection function |
| CN106023411A (en) * | 2016-05-06 | 2016-10-12 | 苏州格兰斯柯光电科技有限公司 | Light-sensing banknote detector with image identification function |
| CN106842449A (en) * | 2017-02-18 | 2017-06-13 | 蚌埠市圆周率电子科技有限公司 | It is a kind of to contain the miniature FDDI FDM Fiber Duct device carved characters with pattern |
| CN107393117A (en) * | 2017-07-18 | 2017-11-24 | 杭州科凡电子有限公司 | Note detection device and detection method |
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Application publication date: 20100630 |