CN1987898A - Digital coding method using material property, digital coding property material composition and its preparing method - Google Patents
Digital coding method using material property, digital coding property material composition and its preparing method Download PDFInfo
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
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Abstract
This invention is about a digitized code method using substance characteristic, the carrier of it is constructed by a group of combined substance. The combined substance owns a kind of common characteristic, the result of which can be gained by a same detection method. Meanwhile, in the characteristic, the detection data of respective substance in the combined substance is different, then the common characteristic has simultaneously become the detection characteristic to distinct the respective substance in the combination. The different substance combination in the above allied substance will be chosen as the code carrier, and the detection data of all the substance in the substance combination will construct the code information, a series of arrangement combination of the different substance in the above substance combination will construct a serious of different codes. this invention takes along fixed and abundant code information by fewer material carrier, the information is conveniently loaded on the goods, and it is impossible to be put down, replaced and forged, it is also impossible to loss information for the division and elution of the material. The code substance can be produced easily and the cost of them is low. This invention is suitable for the commercial as small object and liquid.
Description
Technical field
The invention belongs to technical field of information storage, relate to a kind of feature of utilizing one group of material itself and carry out the method for digital coding, realize this coding method, the property material composition of digital coding, and this preparation of compositions method.
Background technology
It is modern society's needs of economic activities that various things are carried out digital coding.For example, logistic industry at each working links such as storage, transportation, goods registration, distributions, need mark coded message with electronic tag on goods; The market retail trade all needs to utilize the coded message on the bar code of goods in the link of taking stock, sell, pay the bill, keep accounts etc.; Modern production enterprise, total quality control also need be on all products additional coding information; Increasing coding to commodity in the false proof work of commodity also is one of effective measures; Also need coded message on the immunological marker that animal breeding, animal are carried additionally, or the like.
The carrier of the most frequently used coded message is a bar code in the prior art.Bar code is by width difference, different bar and the skies of reflectivity, is compiled into according to certain coding rule (code system), in order to express the graphic symbol of set of number or letter character information.Bar codes technique is a kind of robotization recognition methods that is widely used, and it has become the indispensable means of modernized logistics management.But bar code is printed on paper or the plastics usually, needs the certain physical space, and it and the object that is labeled normally separate, and consequently is replaced easily or forges, and can not be used for the sign of liquid and small items.
A large amount of electronic tags that use are difficult to further reduce cost again, and this becomes it and further enlarges the obstacle that uses.
Summary of the invention
Above-mentioned deficiency at prior art, the purpose of this invention is to provide a kind of new coding method, this method can be carried coded message fixing, q.s by enough considerably less material carriers, and enough many of the varied number of its codified can avoid repeated code effectively.This coded message carrier can be loaded on the article that need sign easily, and can not be taken off mala fide, change or forge.The code carrier that adopts this coding method to produce, not only production method is easy, and cost is very cheap, can use on a large scale on any object.More main characteristics is: coded message carrier of the present invention, the space that needs is very small, and it can be used on the commodity such as small items, liquid even gas as indicating.
The technical scheme that realizes the foregoing invention task is: a kind of digital coding method of utilizing material property, the carrier of this coding method---digital coding property material composition, and the preparation method of this digital coding property material composition.Be respectively described below:
A kind of digital coding method of utilizing material property, encoded carrier is made of one group of combinations of substances, it is characterized in that, material in this combination has the common trait that certain available same detection method obtains the result, simultaneously in this feature, detection data between each material in this combinations of substances have nothing in common with each other, make this common trait become the detected characteristics of each different material in this combinations of substances of difference simultaneously, select combinations of substances different in the above-mentioned same class material as code carrier, the detection data of all substances that comprised in this combinations of substances promptly constitute coded message, the permutation and combination of a series of different components of described combinations of substances promptly constitutes a series of different codings.
In other words, coding method of the present invention, be oppositely to use in order to the method for analysis or evaluation material in the prior art: one group of allied substances is combined, the detected characteristics of utilizing them is as coding, to constitute code carrier, adopt corresponding detecting method to detect the characteristic of all substances in this combination, these data can constitute the set of number of arranging by size, promptly become digital coding.This coding can also utilize mathematical method to carry out various deciphering.
Combinations of substances described in the above scheme, it can be one group of combination with material of different Raman spectrums or infrared absorption spectrum, or has a combination of the material of different X-ray spectrum or X-ray fluorescence Spectra, or has a combination of the material of different fluorescence spectrum (PL) material, or has a combination of the material of different atomic absorption or emission spectrum, or has a combination of the material of different absorption spectra (Absorption spectra), or has a combination of the material of different nuclear magnetic resoance spectrums, or the spectrum peak with different radioactive isotope generations (comprises α, β, the combination of the radiomaterial gamma ray spectrum cutting edge of a knife or a sword), or has a combination of different electron spin resonance spectroscopy materials, perhaps mass spectrum, perhaps high performance liquid chromatogram, gas phase, perhaps electrophoretic analysis, or the combination of the material that can discern of any possible spectral method.Promptly, utilize same principle, we can directly mix, apply or otherwise be additional to and be labeled object by the combinations of substances that these is had coded message, any possible spectral line digitizing is indicated different classes of object respectively, or indicate each different individuality in the same type objects respectively.
Its elementary tactics is:
A, indicate with the direct mode of mixing if desired, at first look for one section or several sections no characteristic spectrum peaks on the spectral line of object or do not have strong characteristic spectrum cutting edge of a knife or a sword or the smoother zone of spectral line being labeled, if directly be attached to body surface, then can choose one section or several sections zone that is easy to detect wantonly
B, these zones are divided into the plurality of sub zone,
C, be defined in and the spectrum peak arranged for " 1 " in the subregion, do not have the spectrum peak and be " 0 " otherwise or,
D, list the arrangement of all possible in this zone " 0 " and " 1 ",
E, find out a series of materials that the characteristic spectrum peak is arranged in this zone,
F, in each subregion, there being the material of characteristic peak to pick out,
The arrangement of " 0 " and " 1 " that J, a selected hope are selected for use, the composition of composition digital coding property material,
H, with above-mentioned digital coding property material composition mix, mix on the surface, apply or be attached to mode such as surface is carried on the object that needs indicate,
I, this program of process, we can show in the enterprising line number sign of any spectral line any object.
For example: the combination of described property material (also can be described as the coding material) can be adopted one group of fluorescent material (combinations of some kinds of different fluorescent powder), this group fluorescent material all has fluorescence spectrum, promptly becomes described " available same detection method obtains result's common trait "; Adopt the some kinds of materials (molecule or nano material) with different photoluminescence peaks to mix the component combination, promptly become the carrier of coded message, they can produce a series of different phosphor patterns on spectrum.If we according to the peak width of existing fluorescent material whole fluorescence spectrum (＞400nm) zoning territory, it is identical with the half-peak breadth or the peak width of fluorescent material that each regional line width can be set, be defined in that fluorescence peak is arranged in the zone is " 1 " no fluorescence peak for " 0 " otherwise or, so just we can map directly to the combination of a series of numerals with " 1 " and " 0 " composition by change fluorescent powder on the fluorescence Spectra.
This digital coding that obtains by detection also can utilize other mathematical method to understand, and promptly above-mentioned C, D, three described mathematical way of step of J also can be used other modes of mathematics instead.
Again for example: the every kind of atom of combination with material of different atomic absorption or emission spectrum can have the feature emission in certain wavelengths in when heating, when continuous light can produce characteristic absorption at same wavelength when containing the object of this atom.We can utilize the spectrum digitizing technique, any one object is carried out digitizing indicate.At first we select one section or several sections wave band that does not have its feature emission or absorb in the object that is labeled, filter out the material that can in this section spectrum, produce the feature emission or absorb then, utilize above-mentioned spectrum digitizing technique, in the object that is labeled, add material, make this object have its specific digital label with various combination.This approach is suitable for the sign of high temperature and gaseous substance, such as, can be used for the sign of iron and steel.
Again for example: different radioactive isotopes has different α, β or γ radiation, when we survey with radiation monitor, because the spectrum peak position difference that different radioactive isotopes produce, we can select one section or several sections no characteristic peaks in the object that is labeled or extra-heavy is levied the peak, or smoother zone, and select the isotope that the characteristic spectrum peak is arranged in this section zone, utilize above-mentioned spectrum digitizing technique, adding has the isotope of various combination in the object that is labeled, and makes this be labeled object and has its specific digital label.Because different isotopes has the different half life period, this approach not only can produce digital label, if the peak value that we begin to make every kind of isotope to produce is identical or become a special ratios, we provide the production phase that is labeled object by the strong and weak ratio of analyzing peak value in the section at any time.This approach is particularly suitable for the sign of nuclear matter or nuke rubbish.
This digital coding method of utilizing material property, can constitute coding with some materials seldom, the coding material can be solid, liquid even gas, with above-mentioned digital coding property material composition mix, mix on the surface, apply or be attached to mode such as surface is carried on the object that needs indicate, can append to coding on the object that needs coding.During use, adopt the relevant detection instrument that the commodity that are added with the coding combinations of substances are detected, can detect this coded message, testing result can demonstrate its coding.And this coded message is compared with bar code and is difficult to be eliminated or change.It is also very cheap to add the cost that this coding spends.
The scheme of finishing second invention task of the present invention is: the carrier of above-mentioned substance feature digitizing coding method: digital coding property material composition, constitute by one group of combinations of substances, it is characterized in that, material in this combination is to have the allied substances that obtains data with a kind of available same detection method, detection data between each material in this combinations of substances have nothing in common with each other, make this common trait become the detected characteristics of each different material in this combinations of substances of difference simultaneously, the detection data of all substances that comprised in this combinations of substances promptly constitute coded message, the permutation and combination of a series of different components of this combinations of substances can constitute a series of different codings.
The preparation method of above-mentioned digital coding property material composition, step is as follows:
Step 1: select property material according to load mode;
Step 2: some kinds of various combinations in selected a series of these property materials constitute series;
Step 3: the various combination that will determine mixes respectively, constitutes a series of different code carriers.
This property material composition carries out the 4th step in use:
Step 4: above-mentioned code carrier is loaded on the article of needs coding by mixing, mix, apply or being attached to mode such as surface.
Wherein step 1 selects the principle of property material to be:
Between A, the object that is labeled and the material, more significantly difference is arranged on detected characteristics as coding.For example utilize fluorescence as the coding material, then the fluorescence signal of requirement coding material has detectable difference with the fluorescence signal of the object that is labeled itself;
B, the object that is labeled mix easily with the material of conduct coding or are additional;
C, can the use character of the object that is labeled not impacted as the material of coding.
Coding method of the present invention can be carried coded message fixing, q.s by enough considerably less material carriers, and enough many of the varied number of its codified can avoid repeated code effectively.This coded message carrier can be loaded on the article that need sign easily, and can not be taken off mala fide, change or forge.The code carrier that adopts this coding method to produce, not only production method is easy, and cost is very cheap, can use on a large scale on any object.This technology can have the more general purposes of light, and its superiority also shows the following aspects:
1, it can indicate liquid and solid by property material (also can be described as coding material) is directly mixed with liquid or solid, rather than resembles and need be imprinted in the external packing the bar code.
2 if the object that indicates by the method for mixing can not cutting apart or dilute the information that it carries that loses owing to object.As long as object also exists, by digitized check and analysis, we can recover the information that it carries at any time.
3, recognition coding indicates not need to resemble and relates to complex figure identification the bar code.
4, this technology in spectral space, does not need physical space to information stores basically, so be difficult for being found.Because this characteristic, it can also be used to indicating small items, such as bacterium even virus.
Such as; indiscriminate use of pesticide is a problem that extensively exists in a lot of areas at present; if we can directly put into certain coding material in agricultural chemicals (liquid or solid); just can be stored in the essential information of agricultural chemicals (comprising manufacturer) in this coding material, this can play very positive effect to the safe handling that suppresses agricultural chemicals abuse and vegetables.And for example, counterfeit money is a problem that current existence is more serious, if we can directly add certain specific coding material in paper that is used for making bank note or printing ink, can effectively suppress the forgery of bank note.
Description of drawings
Fig. 1～Figure 15 is respectively the digitizing fluorescence peak spectrum of embodiment 1.
Embodiment
Embodiment 1, utilize fluorescent material coding method and the coding combinations of substances, with and production method.
(peak value lays respectively at 490 four kinds of Evitag-T2-MP fluorescent powder buying from U.S. Evident Technologies, 520,580 and 620nm) by the method for describing in the technical scheme possible combination is mixed, measure its photoluminescence spectrum with UV-irradiation then.Fig. 1～Figure 15 has provided 15 kinds of digitizing fluorescence peak spectrums except that 0000.
Its principle is: some predetermined substance is subjected to the irradiation of ultraviolet light, can produce another kind of light, and this phenomenon is exactly a fluorescence phenomenon.Different materials can produce different fluorescence.For some nano materials, same material, the varying in size of particle, its photoluminescence peak also can be different.Material with different photoluminescence peaks (molecule or nano material) mixed on spectrum, to produce a series of different phosphor patterns.If we according to the peak width of existing fluorescent material whole fluorescence spectrum (＞400nm) zoning territory, it is identical with the half-peak breadth or the peak width of fluorescent material that each regional line width can be set, be defined in that fluorescence peak is arranged in the zone is " 1 " no fluorescence peak for " 0 " otherwise or, so just we can map directly to the combination of a series of numerals with " 1 " and " 0 " composition by change fluorescent powder on the fluorescence Spectra.
Suppose that available fluorescence Spectra width is W, each regional width is d, and then the capacity of this method is (W/d) power of 2.Such as, we select 400nm to this section of 1000nm spectrum, utilize the fluorescence material of half-peak breadth for 50nm, and we can indicate 2^12=4096 kind different material or situation with 12 kinds of different fluorescent materials, that is to say that its capacity is 4096.If we can find the narrower fluorescent material of peak width, its capacity can significantly be improved.Such as, same spectral line section but the fluorescence Spectra peak width is 25nm, we can use 24 kinds of different fluorescent materials, and the capacity of this method can rise to 1677216.
By such method, we can be the fluorescence Spectra digitizing.A numeral is all represented in each group fluorescence peak combination.We can give specific implication each numeral to the definition of different numerals then.Such as, we can set 4000 certain liquid pesticidals for the production of first factory, 4001 certain solid fertilizers for the production of second factory.We can also give specific meanings different positions.Such as, we can be used for defining the toxicity that is labeled object to two zones from 400nm, and 00 expression is nontoxic, the little poison of 01 expression, 10 expressions are poison, 11 expression severe toxicity.We also can mix the fluorescent material of representing optional network specific digit and be used for false proofly in the printing ink of bank note or paper, we can also directly make up the face amount of bank note and represent with digitized fluorescence peak.
Part solid and liquid have absorption peak or fluorescence peak, and we can utilize its zone that does not have absorption peak and fluorescence peak to carry out the digitizing operation, and numerical information is mapped on the spectrum.
Inhomogeneous fluorescent material has different light fluorescence excitation honeybees, such as, a kind of material can demonstrate its light fluorescence under the exciting of 400nm light, and another kind of material demand just can send its characteristic light fluorescence under the 300nm optical excitation.We can mix the capacity that improves this method to excitation peak at the fluorescent material of 300nm with excitation peak at 400nm.We can also give different implications the fluorescence that different excitation peaks produce.Can be used for representing manufacturer such as, the fluorescence of 300nm, the fluorescence of 400nm is used for representing the material title.
Fig. 1～fluorescence spectrum shown in Figure 15 is proofreaied and correct the system responses curve.In above spectrum, we have distinguished four different looks with different square frames respectively and have come, and suppose that it is " 1 " that fluorescence peak is arranged in specific zone, and not having fluorescence peak is " 0 ", has marked in each figure and the corresponding combination of numbers of fluorescence Spectra.Can see that by the method for describing with us, we can hint obliquely at numerical information on the spectrum fully in technical scheme.
In practice, we can be with other solid and fluorescent liquid dyestuff arbitrarily, and to solid, liquid even gas carry out digital phosphor and indicates, and in a wavelength selected section numerical information are mapped directly on the spectrum.
The phosphor combination that is incorporated in the numerical information of carrying the expression face amount on the fluorescence Spectra in the paper of different bank note or printing ink constitutes the coding material, can be used for false proofly, also can be used for distinguishing the face amount of bank note.
Be incorporated in the phosphor combination of carrying different digital information on the fluorescence Spectra in agricultural chemicals, after agricultural chemicals used, these information can be stayed on the agricultural chemicals vestiges.By analysis, can recover the information that is carried in the agricultural chemicals out to the agricultural chemicals vestiges.If can be the title of agricultural chemicals, kind or toxicity deposit in the fluorescence Spectra, and the eater can recover these information to come out from the agricultural chemicals vestiges with better simply means, thereby provide safeguard for the safety of agricultural product is edible.
Can be incorporated in the phosphor combination of carrying different digital information on the fluorescence Spectra in decorative paint is used for false proof.
Can arrange a numeral in each factory, in the sewage that they discharge, forcibly add and carry the fluorescent powder of respective digital information near the river.When the downstream river was polluted, we can the entrained numerical information of fluorescent powder find out the producer that pollutes at once from pollutant, for the protection water resource provides a kind of effective means.In this kind application, the fluorescent powder that mixes need be pre-mixed and be bonded together to pulverize then and sneak in the sewage of discharge.
Embodiment 2 is substantially the same manner as Example 1, but property material is the combination of adopting the material with different Raman spectrums.
Embodiment 3, and is substantially the same manner as Example 1, but property material is the combination of adopting the material with different X-ray spectrum.
Embodiment 4, and is substantially the same manner as Example 1, but property material is the combination of adopting the material with different X-ray fluorescence Spectra.
Embodiment 5, and is substantially the same manner as Example 1, but property material is the combination of adopting the material with different atomic absorption spectrums.
Embodiment 6, and is substantially the same manner as Example 1, but property material is the combination of adopting the material with different atomic emissions spectrums.
Embodiment 7, and is substantially the same manner as Example 1, but property material is the combination of adopting the material with different absorption spectra (Absorption spectra).
Embodiment 8, and is substantially the same manner as Example 1, but property material is the combination of adopting the material with different nuclear magnetic resoance spectrums.
Embodiment 9, and is substantially the same manner as Example 1, but the combination of the radiomaterial at the different α radiation spectrums peak that property material is the employing radioactive isotope to be produced.
Embodiment 10, and is substantially the same manner as Example 1, but the combination of the radiomaterial at the different beta radiation spectrum peak that property material is the employing radioactive isotope to be produced.
Embodiment 11, and is substantially the same manner as Example 1, but the combination of the radiomaterial at the different γ radiation spectrums peak that property material is the employing radioactive isotope to be produced.
Embodiment 12, and is substantially the same manner as Example 1, but property material is the combination of adopting the material with different mass spectrum spectrum peaks.
Embodiment 13, and is substantially the same manner as Example 1, but property material is the combination of adopting the material with different high performance liquid chromatogram spectrum peaks.
Embodiment 14, and is substantially the same manner as Example 1, but property material is the combination of adopting the material with different gas phase spectrum peaks.
Embodiment 15, and is substantially the same manner as Example 1, but property material is the combination of adopting the material with different electrophoretic analysis collection of illustrative plates.
Property material can also be the combination of the material that can discern of any possible spectral method.
Scope that the present invention asks for protection and embodiment are not limited to the scope that the foregoing description exemplifies.
Claims (9)
1, a kind of digital coding method of utilizing material property, encoded carrier is made of one group of combinations of substances, it is characterized in that, material in this combination has the common trait that certain available same detection method obtains the result, simultaneously in this feature, detection data between each material in this combinations of substances have nothing in common with each other, make this common trait become the detected characteristics of each different material in this combinations of substances of difference simultaneously, select combinations of substances different in the above-mentioned same class material as code carrier, the detection data of all substances that comprised in this combinations of substances promptly constitute coded message, the permutation and combination of a series of different components of described combinations of substances promptly constitutes a series of different codings.
2, according to the described digital coding method of utilizing material property of claim 1, it is characterized in that, described formation encoded carrier combinations of substances, it is one group of combination with material of different Raman spectrums, or has a combination of the material of different X-ray spectrum or X-ray fluorescence Spectra, or has a combination of the material of different fluorescence spectrum materials, or has a combination of the material of different atomic absorption or emission spectrum, or has a combination of the material of different absorption spectras, or has a combination of the material of different nuclear magnetic resoance spectrums, or have the combination of the radiomaterial at the spectrum peak that different radioactive isotope produces, or has the combination of different electron spin resonance spectroscopy materials.
3, according to claim 1 or the 2 described digital coding methods of utilizing material property, it is characterized in that concrete coding method is:
A, look for one section or several sections no characteristic spectrum peaks on the spectral line of object or do not have strong characteristic spectrum or the smoother zone of spectrum cutting edge of a knife or a sword being labeled,
B, if these zones are divided into subregion,
C, be defined in have in the subregion spectrum peak for " 1 " do not have the spectrum peak for " 0 " otherwise or,
D, list the arrangement of all possible in this zone " 0 " and " 1 ",
E, find out a series of materials that the characteristic spectrum peak is arranged in this zone,
F, in each subregion, there being the material of characteristic peak to pick out,
The arrangement of " 0 " and " 1 " that J, a selected hope are selected for use, the composition of composition digital coding property material,
H, with above-mentioned digital coding property material composition mix, mix on the surface, apply or be attached to mode such as surface is carried on the object that needs indicate,
I, the above program of process are shown in the enterprising line number sign of any spectral line any object.
4, according to the described digital coding method of utilizing material property of claim 3, it is characterized in that the method that described digital coding property material composition is carried on the object that need to indicate is: by mix, mix on the surface, apply or be attached to mode such as surface.
5, the described carrier that utilizes the digital coding method of material property of a kind of claim 1: digital coding property material composition, constitute by one group of combinations of substances, it is characterized in that, material in this combination is to have the allied substances that obtains data with a kind of available same detection method, detection data between each material in this combinations of substances have nothing in common with each other, make this common trait become the detected characteristics of each different material in this combinations of substances of difference simultaneously, the detection data of all substances that comprised in this combinations of substances promptly constitute coded message, the permutation and combination of a series of different components of this combinations of substances can constitute a series of different codings.
6, according to the described digital coding property material composition of claim 5, it is characterized in that, described combinations of substances, it is one group of combination with material of different Raman spectrums, or has a combination of the material of different X-ray spectrum or X-ray fluorescence Spectra, or has a combination of the material of different fluorescence spectrum materials, or has a combination of the material of different atomic absorption or emission spectrum, or has a combination of the material of different absorption spectras, or has a combination of the material of different nuclear magnetic resoance spectrums, or have the combination of the radiomaterial at the spectrum peak that different radioactive isotope produces, or has the combination of different electron spin resonance spectroscopy materials.
7, the preparation method of the described digital coding property material composition of a kind of claim 5, step is as follows:
Step 1: select property material according to load mode;
Step 2: some kinds of various combinations in selected a series of these property materials constitute series;
Step 3: the various combination that will determine mixes respectively, constitutes a series of different code carriers.
According to the preparation method of the described digital coding property material composition of claim 7, it is characterized in that 8, this property material composition carries out the 4th step in use:
Step 4: above-mentioned code carrier is loaded on the article that need coding.
According to the preparation method of claim 7 or 8 described digital coding property material compositions, it is characterized in that 9, described step 1 selects the principle of property material to be:
Between A, the object that is labeled and the material, more significantly difference is arranged on detected characteristics as coding;
B, the object that is labeled mix easily with the material of conduct coding or are additional;
C, can the use character of the object that is labeled not impacted as the material of coding.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101612176A CN1987898A (en) | 2006-12-15 | 2006-12-15 | Digital coding method using material property, digital coding property material composition and its preparing method |
| PCT/CN2007/002149 WO2008071052A1 (en) | 2006-12-15 | 2007-07-13 | Digital coding method with material character, combination with digital coding character material, and producing method thereof |
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| CNA2006101612176A CN1987898A (en) | 2006-12-15 | 2006-12-15 | Digital coding method using material property, digital coding property material composition and its preparing method |
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| CN103186803A (en) * | 2013-03-19 | 2013-07-03 | 南京大学 | Raman-spectrum-based nanometer bar code smart label and identification method thereof |
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| DE102008060675B4 (en) | 2008-12-08 | 2012-11-08 | Polysecure Gmbh | A method for the unique identification and authentication of products for protection against plagiarism |
| CN113234189B (en) * | 2021-06-01 | 2023-03-10 | 湖南科技大学 | Method for applying photoswitch polymorphic fluorescent polymer to data encryption |
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| US5093147A (en) * | 1990-09-12 | 1992-03-03 | Battelle Memorial Institute | Providing intelligible markings |
| CN1157699C (en) * | 1998-11-09 | 2004-07-14 | 天津戈德防伪识别有限公司 | Article truth identifying system |
| FR2869704B1 (en) * | 2004-04-28 | 2006-09-29 | Claude Lambert | METHOD FOR AUTHENTICATION SECURED BY MARKING OR CHEMICAL TRACING OF AN OBJECT OR SUBSTANCE |
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| CN103186803A (en) * | 2013-03-19 | 2013-07-03 | 南京大学 | Raman-spectrum-based nanometer bar code smart label and identification method thereof |
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