CN102152651B - Method and device for identifying three-dimensional anti-fake label on basis of laser shock - Google Patents
Method and device for identifying three-dimensional anti-fake label on basis of laser shock Download PDFInfo
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- CN102152651B CN102152651B CN 201010548523 CN201010548523A CN102152651B CN 102152651 B CN102152651 B CN 102152651B CN 201010548523 CN201010548523 CN 201010548523 CN 201010548523 A CN201010548523 A CN 201010548523A CN 102152651 B CN102152651 B CN 102152651B
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Abstract
The invention relates to the technical field of anti-fake identification and laser processing, in particular to a method and a device for identifying a three-dimensional anti-fake label on the basis of the laser shock. Different three-dimensional labels are formed on the surface of a workpiece point by point by the mechanical effect of a laser shock wave; according to different light reflection intensities of the points with different appearances, a light intensity curve is used as the basis of anti-fake identification; and meanwhile, parameters of a laser beam and three-dimensional appearances are combined to be used as the basis for anti-fake identification in a label mode.
Description
Technical field
The present invention relates to anti-counterfeit recognition and technical field of laser processing, refer in particular to a kind of method and apparatus of distinguishing based on the 3 D antiforge mark of laser-impact, it utilizes the mechanics effect pointwise of laser blast wave to form different three-dimensional marks at surface of the work, pattern difference according to every bit is different to reflection of light intensity, draw light intensity as the false proof foundation of distinguishing, simultaneously parameters of laser beam and three-dimensional appearance are combined form with label as the false proof foundation of distinguishing.
Background technology
In recent years, along with the fast development of economy, counterfeit and shoddy goods are significantly increasing, and have impelled the fast development of anti-counterfeiting technology.Traditional anti-fake mark technology has ink indicia, steel code impression etc., and there is a large amount of defectives in these labelling techniques, easily disappears not durable and without false proof effect such as ink indicia; The steel code impresses heavy damage piece surface state, definition is unstable, efficient is low.Just because of there being these defectives, can not satisfying the needs of economic development and anti-counterfeiting technology and be eliminated gradually.
Along with the development of laser technology, laser labelling has replaced traditional anti-fake mark technology and has been widely used.The laser labelling technology of using at present is to utilize the fuel factor of laser, high energy laser beam is radiated at surface of the work and makes rapidly vaporization formation of surfacing mark, there is a very large shortcoming in this labelling technique of laser ablation fuel factor of utilizing, laser ablation is removed one deck with the surfacing of metal parts, thereby destroyed the residual stress state of piece surface, form residual tension state and fine crackle, therefore, the labelling technique of laser thermal effect is not suitable for using on the key position of vital part and part.
The laser-impact mechanics effect can form obvious plastic deformation pit at material surface, can be used as the mark of anti-counterfeiting mark.The outstanding advantages of laser-impact mechanics effect mark is: it is to utilize the mechanics effect of laser blast wave to make material surface generation plastic deformation, and then generation residual compressive stress, not only can produce clear and legible sign, play false proof effect, but also can effectively change the stress state of material surface, produce residual compressive stress at material surface, improve the service life of material.
In calendar year 2001, the people such as the Dance C Brent of U.S. Lawrence Livermore National Key Laboratory and Hackel Lloyda have just declared laser peening mark patent (Identification marking by means of laser peening, Patent Number:Wo0161619,2001-08-23), be the harmless mark that utilizes the laser blast wave mechanics effect.The harmless mark patent about the laser-impact mechanics effect has also been declared by Zhang Yongkang seminar of laser technology research institute of domestic Jiangsu University: the method and apparatus of laser shock wave three dimensional highly false proof nondestructive marking [P], number of patent application: 200510037968.2, applicant: Jiangsu University, date of application: 2005.3.4; A kind of method and apparatus [P] based on the confocal laser shock wave three dimensional sign of void, number of patent application: 200810123828.0, applicant: Jiangsu University, date of application: 2008.6.5.They all are that laser blast wave is combined the non-destructive of material and the controllability of liquid crystal mask gray scale, the plastic deformation force that obtains different time and spatial distribution realizes three-dimensional plastic, but the shortcoming of these inventive methods and device is at present: all used liquid crystal mask absorption spectrum, the laser-impact power density that has reduced target material surface has namely reduced the utilization rate of laser, complicated operation, and recognition methods is not described.
The present invention proposes a kind of method and apparatus of distinguishing based on the 3 D antiforge mark of laser-impact solves these problems, its beneficial effect is: the mechanics effect that takes full advantage of laser blast wave, utilize shock point pattern difference different to reflection of light intensity when three-dimensional mark is impacted in pointwise, the curve that the luminous intensity of power meter collection is drawn is as the false proof foundation of distinguishing.Simultaneously the complete pattern of parameters of laser beam (pulse width, pulse energy, pulse wavelength) and three-dimensional mark is combined form with label as the false proof foundation of distinguishing.
Summary of the invention
For the defective of prior art, the present invention proposes a kind of method and apparatus of distinguishing based on the 3 D antiforge mark of laser-impact.
A kind of method of distinguishing based on the 3 D antiforge mark of laser-impact, utilize the mechanics effect of laser blast wave, change parameters of laser beam, impact number of times and impact the path, the plastic deformation force of obtaining different time and spatial distribution obtains three-dimensional mark, it is characterized in that: when mark is impacted in the laser pointwise, a branch of exploring laser light is radiated at pit, because the pattern difference of pit is different to the reflected intensity of exploring laser light, use probe to accept reverberation and pass to power meter, real-time and the industrial computer communication of power meter, industrial computer is drawn light intensity is stored in the three-dimensional mark of laser-impact as the false proof foundation of distinguishing identifying information storehouse according to the data of power meter collection; The form that simultaneously pattern of parameters of laser beam and three-dimensional mark is combined with label sticks on mark, and it is different according to parameters of laser beam to be convenient to the consumer, and the size of three-dimensional mark pit, depth difference are identified true and false then and there.
Described parameters of laser beam is pulse width, pulse energy and pulse wavelength.
A kind of device of distinguishing based on the 3 D antiforge mark of laser-impact, comprise industrial computer, printer, power source laser device, the light beam spatial modulator, motion control card and workpiece clamp system, it is characterized in that: also be provided with the He-Ne laser instrument as probe source, power meter, probe and CCD mark deriving means, the laser beam that power source laser device after the position of He-Ne laser instrument should guarantee the laser beam that sends and regulate through the light beam spatial modulator sends meets at same point, He-Ne laser instrument and probe are symmetrical, the light beam that sends of guaranteeing the He-Ne laser instrument can be by probe acceptance after the pit reflection, probe links to each other with power meter, industrial computer elastic calibration device and CCD mark deriving means.
Described workpiece clamp system is comprised of restraint layer (water or glass), flexible lamina, workpiece, five axle workbench.
Its implementation process is as follows:
(1) according to workpiece material and mark zone size, select flexible lamina, stick on the mark zone as absorbed layer, its effect is that the protection surface of the work is not by laser beam ablation;
(2) according to workpiece material and indicia patterns, select parameters of laser beam: 10 ~ 100 joules of pulse energies, pulse width have 8 ~ 80 nanoseconds, pulse wavelength to select, impact number of times 1 ~ 100 time according to the wavelength that laser instrument provides; Work by the parameters of laser beam drive laser of selecting by industrial computer, the laser beam that produces converges on the flexible lamina of surface of the work through the light beam spatial modulator, the vaporization of flexible lamina top layer, ionization, the blast of formation plasma, produce the high-amplitude shock wave, material generation plastic deformation under the effect of shock wave force effect; Industrial computer drives workpiece motion s according to pattern form by motion control card control five axle workbench, needing to realize the three-D pattern of mark;
(3) smaller on not impact of the shock wave force effect in the power source laser device impact process as the He-Ne energy of lasers of probe source.The laser pointwise is impacted before the mark, regulates the hot spot of power source laser device and the hot spot of He-Ne laser instrument and acts on all the time same point.The laser beam transfixion after the light beam spatial modulator is regulated that power source laser device produces guarantees that the hot spot of He-Ne laser instrument overlaps with the hot spot of power source laser device all the time, is radiated at the impact dent place; Because the difference of parameters of laser beam, the pit pattern that obtains is different, intensity of reflected light to He-Ne laser instrument probe source is different, accept to pass to power meter through the light of pit reflection by the probe that is positioned at laser instrument impulsive force source beam opposite side, industrial computer on line real time control power meter is drawn light intensity is stored in the three-dimensional mark of laser-impact as the false proof foundation of distinguishing identifying information storehouse according to the luminous intensity numerical value that probe gathers;
Three-dimensional mark pattern behind the laser-impact that parameters of laser beam when (4) industrial computer is with the laser-impact mark and CCD mark deriving means obtain combines and prints by printer, stick near the mark zone with the form of label, it is different according to parameters of laser beam to be convenient to the consumer, and the size of three-dimensional mark pit, depth difference are identified true and false then and there.
The invention has the advantages that:
1, according to the difference of three-dimensional mark pattern, the light intensity data that power meter gathers is different, draw light intensity and be stored in the identifying information storehouse of the three-dimensional mark of laser-impact, pattern with parameters of laser beam (pulse width, pulse energy, pulse wavelength) and three-dimensional mark sticks on the mark zone in conjunction with the form with label simultaneously, is convenient to the consumer scene and distinguishes.Really play convenience, the simple false proof effect of stereo identification;
2, apparatus of the present invention is simple in structure, easy to operate, and use liquid crystal mask useless has improved the utilization rate of laser greatly;
3, utilize the mechanics effect of laser blast wave rather than utilize the Hot-ablated effect of laser, when forming mark, surface of the work changed the stress state of impact zone, form residual compressive stress and reduced the roughness of impact zone, the service life of having improved workpiece at impact zone.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples;
Fig. 1 is the overall structure figure of the 3 D antiforge mark condition discriminating apparatus of laser-impact;
1, printer; 2, industrial computer; 3, motion control card; 4, power meter; 5, probe; 6, five axle workbench; 7, workpiece; 8, flexible lamina; 9, restraint layer; 10, He-Ne laser instrument; 11, CCD mark deriving means; 12, light beam spatial modulator; 13, power source laser device.
The specific embodiment
Describe details and the working condition of the concrete device of the present invention's proposition in detail below in conjunction with Fig. 1.
Apparatus of the present invention are comprised of printer 1, industrial computer 2, motion control card 3, power meter 4, probe 5, five axle workbench 6, workpiece 7, flexible lamina 8, restraint layer 9, He-Ne laser instrument 10, CCD mark deriving means 11, light beam spatial modulator 12 and power source laser device 13.
On five axle workbench 6, the material of workpiece 7 and mark zone size are selected flexible lamina 8, and cover restraint layer 9 for increasing the shock wave amplitude above flexible lamina 8; According to the requirement of indicia patterns, select parameters of laser beam, power source laser device 13 produces 10 ~ 100 joules of pulse energies, 8 ~ 80 nanoseconds of pulse width, pulse wavelength (1064nm, 532nm, 355nm), impact number of times 1 ~ 100 time, the facular model of laser beam can be the various modes such as basic mode and multimode; Before the laser-impact mark, conditioning equipment makes the detection hot spot of He-Ne laser instrument 10 overlap with the hot spot of power source laser device 13, in impacting labeling process, the laser beam transfixion after the light beam spatial modulator is regulated that power source laser device produces, guarantee that the hot spot of the hot spot of He-Ne laser instrument and power source laser device acts on the same position of mark zone all the time, work by the parameters of laser beam drive laser 13 of selecting by industrial computer 2, the laser beam that produces converges on the flexible lamina 8 on workpiece 6 surfaces through light beam spatial modulator 12, the vaporization of flexible lamina 8 top layers, ionization, the blast of formation plasma, produce the high-amplitude shock wave, material generation plastic deformation under the knock wave mechanics effect effect; He-Ne laser instrument 10 and probe 5 symmetries are positioned at the light beam both sides of power source laser device 13, because parameters of laser beam was different when the laser pointwise was impacted, different at the pit pattern that material surface forms, the probe 5 that the reverberation of Ear Mucosa Treated by He Ne Laser Irradiation at the impact dent place of He-Ne laser instrument 10 emission is positioned at laser instrument impulsive force source beam opposite side gathers and passes to power meter 4, power meter 4 real-time and industrial computer 2 communications, the data that industrial computer 2 gathers according to power meter 4 are drawn light intensity is stored in the three-dimensional mark of laser-impact as the false proof foundation of distinguishing identifying information storehouse, industrial computer 2 drives workpiece 7 motions according to pattern form by motion control card 3 controls five axle workbench 6, needing to realize the three-D pattern of mark; Industrial computer 2 during with the laser-impact mark parameters of laser beam and the laser-impact that obtains of CCD mark deriving means 11 after three-dimensional mark pattern put together and print by printer 1, stick near the mark zone with the form of label, it is different according to parameters of laser beam to be convenient to the consumer, size, the depth difference of three-dimensional mark pit identified true and false then and there, really plays convenience, the simple false proof effect of stereo identification.
Claims (1)
1. method of distinguishing based on the 3 D antiforge mark of laser-impact, utilize the mechanics effect of laser blast wave, change parameters of laser beam, impact number of times and impact the path, the plastic deformation force of obtaining different time and spatial distribution obtains three-dimensional mark, it is characterized in that: when mark is impacted in the laser pointwise, a branch of exploring laser light is radiated at pit, because the pattern difference of pit is different to the reflected intensity of exploring laser light, use probe to accept reverberation and pass to power meter, real-time and the industrial computer communication of power meter, industrial computer is drawn light intensity is stored in the three-dimensional mark of laser-impact as the false proof foundation of distinguishing identifying information storehouse according to the data of power meter collection; The form that simultaneously pattern of parameters of laser beam and three-dimensional mark is combined with label sticks on mark, and it is different according to parameters of laser beam to be convenient to the consumer, and the size of three-dimensional mark pit, depth difference are identified true and false then and there, and step is specially:
(1) according to workpiece material and mark zone size, select flexible lamina, stick on the mark zone as absorbed layer, its effect is that the protection surface of the work is not by laser beam ablation;
(2) according to workpiece material and indicia patterns, select parameters of laser beam: 10 ~ 100 joules of pulse energies, pulse width have 8 ~ 80 nanoseconds, pulse wavelength to select, impact number of times 1 ~ 100 time according to the wavelength that laser instrument provides; Work by the parameters of laser beam drive laser of selecting by industrial computer, the laser beam that produces converges on the flexible lamina of surface of the work through the light beam spatial modulator, the vaporization of flexible lamina top layer, ionization, the blast of formation plasma, produce the high-amplitude shock wave, material generation plastic deformation under the effect of shock wave force effect; Industrial computer drives workpiece motion s according to pattern form by motion control card control five axle workbench, needing to realize the three-D pattern of mark;
(3) the laser pointwise is impacted before the mark, the hot spot of adjusting power source laser device and the hot spot of He-Ne laser instrument act on same point all the time, the laser beam transfixion after the light beam spatial modulator is regulated that power source laser device produces, the hot spot of guaranteeing the He-Ne laser instrument overlaps with the hot spot of power source laser device all the time, is radiated at the impact dent place; Because the difference of parameters of laser beam, the pit pattern that obtains is different, intensity of reflected light to He-Ne laser instrument probe source is different, accept to pass to power meter through the light of pit reflection by the probe that is positioned at laser instrument impulsive force source beam opposite side, industrial computer on line real time control power meter is drawn light intensity is stored in the three-dimensional mark of laser-impact as the false proof foundation of distinguishing identifying information storehouse according to the luminous intensity numerical value that probe gathers;
Three-dimensional mark pattern behind the laser-impact that parameters of laser beam when (4) industrial computer is with the laser-impact mark and CCD mark deriving means obtain combines and prints by printer, stick near the mark zone with the form of label, it is different according to parameters of laser beam to be convenient to the consumer, and the size of three-dimensional mark pit, depth difference are identified true and false then and there.
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| CN 201010548523 CN102152651B (en) | 2010-11-18 | 2010-11-18 | Method and device for identifying three-dimensional anti-fake label on basis of laser shock |
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| CN 201010548523 CN102152651B (en) | 2010-11-18 | 2010-11-18 | Method and device for identifying three-dimensional anti-fake label on basis of laser shock |
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| CN105034609A (en) * | 2015-08-04 | 2015-11-11 | 上海银玛标识技术有限公司 | Laser inkjet printer for engineering plastic clear identification |
| CN109317668B (en) * | 2017-07-31 | 2020-10-13 | 株式会社松浦机械制作所 | Three-dimensional modeling method |
| CN110458271B (en) * | 2019-08-01 | 2024-03-22 | 大有智能科技(嘉兴)有限公司 | Manufacturing method, equipment, verification method, equipment and processing system of anti-counterfeiting mark |
| CN113197779B (en) * | 2021-04-26 | 2022-10-04 | 佛山隆深机器人有限公司 | XiLin bottle is beaten mark device |
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| CN100357056C (en) * | 2005-03-04 | 2007-12-26 | 江苏大学 | Method and apparatus for laser shock wave three dimensional highly false proof nondestructive marking |
| CN101308312A (en) * | 2008-06-05 | 2008-11-19 | 江苏大学 | Laser impact wave three-dimensional marking method and device based on suppositional cofocus |
| CN101876627B (en) * | 2010-03-16 | 2012-05-23 | 江苏大学 | Optical power meter technology-based method for detecting interface bonding state of laser scratch |
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