CN103792241A - High-speed acquisition test system used for coin or stamper with multi-surface invisible patterns - Google Patents
High-speed acquisition test system used for coin or stamper with multi-surface invisible patterns Download PDFInfo
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- CN103792241A CN103792241A CN201210419608.9A CN201210419608A CN103792241A CN 103792241 A CN103792241 A CN 103792241A CN 201210419608 A CN201210419608 A CN 201210419608A CN 103792241 A CN103792241 A CN 103792241A
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Abstract
The invention relates to a high-speed acquisition test system used for a coin or a stamper with multi-surface invisible patterns, the a high-speed acquisition test system is characterized by comprising a conveyor belt, a front-placing area-array camera and a test area-array camera, the front-placing area-array camera and the test area-array camera are arranged above the conveyor belt, the bottom of the front-placing area-array camera is equipped a front-placing LED light source, and an image acquisition light source device is arranged below the test area-array camera. When in use, by the arrangement of the front-placing area-array camera and the test area-array camera and the arrangement of the image acquisition light source device below the test area-array camera, the high-speed acquisition test system can clearly restore and display a variety of invisible patterns, and eliminate the deviation between machine vision and human eye vision, thus completing the high precision image acquisition of invisible coin surface patterns which are dynamically input into a light source system in random directions and at a high speed. The high precision image acquisition comprises high precision image acquisition of multi-slope angle, multi-surface or multi-group invisible coin surface patterns. The high-speed acquisition test system is an intelligent light source system which can completely simulate the human eye, and can achieve high-precision test control requirements, and the light source system is simple and reliable in structure, can fully meet the needs of practical production and application.
Description
Technical field
The present invention relates to the technical field that coinage detects, the specifically high speed acquisition detection system of a kind of coin for multiaspect hidden pattern or chapter, relates in particular to image acquisition light supply apparatus wherein.
Background technology
During current specie flow coin is manufactured, in order to control the conventional quality in coin surface, adopted Vision Builder for Automated Inspection to carry out high speed online detection and control to the conventional surface quality of coin both at home and abroad, Chinese invention patent CN101393138 has just reflected this coin finished goods face quality online measuring technique.
And along with the needs of the false proof anti-vacation of coin, increasing at coin surface applications hidden pattern, stealthy engraving technology is owing to being special manufacturing process by three-dimensional by combination of patterns different to two kinds (or three kinds, four kinds and more than) on a figure and producing two kinds of (or three kinds, four kinds and more than) different visual pattern effects, and these two kinds (or three kinds, four kinds and more than) patterns replace and occur and hiding according to the difference of light angle or observation point.Chinese invention patent ZL200410020692.2 has just disclosed the technology how this multiaspect hidden pattern is made.
Because hidden pattern is produced on the ridge face on one group of parallel mountain peak, the ridge face on this parallel mountain peak of group presents three-dimensional feature, the pattern forming on this group ridge face or word only have by with could clearly observe with the specific direction of ridge face on this mountain peak, could clearly observe by " with specific vertical plane (the being G-O-Y plane) direction of the ridge face (being A-B-C-D plane) on mountain peak ".Wherein, two specific direction planes (being G-O-Y plane and X-O-Y plane) form angle β; Should α be identical for gradient angle with the ridge face on hidden pattern mountain peak (being A-B-C-D ridge face and X-O-Z plane), i.e. β=α (referring to Fig. 1).
Double-side hidden pattern need to could clearly be observed by two different specific directions and visual angle, and three hidden patterns need to could clearly be observed by three different specific directions and visual angle, and the like.
For example, 500 Yen of coin circulations of Japan's distribution are concealed with two kinds of hidden patterns (double-side hidden pattern) in 500 two " 0 ", and the gradient angle α of these 500 Yen of Coin two-sided hidden patterns is 46 ° and is symmetrical arranged (referring to Fig. 3 A, Fig. 3 B).
In vertically observing from the top down 500 Yen of coin surfaces, can't see any special pattern (hidden pattern does not manifest, referring to Fig. 4 A, Fig. 4 B).But, watch ［ by " with specific vertical plane (the being G-O-Y plane) direction of ridge face (being A-B-C-D plane) on mountain peak " along the specific direction of this coin, its ∠ β=∠ α=46 ° ］, can see the pattern that has obvious " 500 pellet " in two " 0 ".In like manner, watch along the specific direction of the another side of this coin, can see in same position two " 0 " and have the significantly pattern of " | ".In other words, at the same position place of 500 Yen of coins, there are two kinds of different hidden patterns or hidden hidden pattern because the visual angle of observing is different, in the time that observation visual angle is offset this two special angle directions observations gradually, two kinds of hidden patterns manifest also variation and disappearance gradually of sharpness, watch and only have along specific two angle directions of this coin, the hidden pattern of observing is the most clear.
Example two, the commemorative coin of Spain's 1996 Olympic Games distribution, in this commemorative coin olive shape region, have hiding two kinds of hidden patterns (double-side hidden pattern), the gradient angle α of this commemorative coin double-side hidden pattern is 51 ° and is symmetrical arranged (referring to Fig. 5, Fig. 6).
In vertically observing from the top down Spain Olympic Games coin surface in 1996, can't see any special pattern (hidden pattern does not manifest).But, watch ［ by " with specific vertical plane (the being G-O-Y plane) direction of ridge face (being A-B-C-D plane) on mountain peak " along the specific direction of this coin, its ∠ β=∠ α=51 ° ］, there is the pattern of " bent body squat down sportsman " in can seeing in olive shape region.In like manner, watch along the specific direction of the another side of this coin, have the pattern of " sportsman who uprightly runs " in can seeing in same position olive shape region.In other words, at the same position place of this coin, there are two kinds of different hidden patterns or hidden hidden pattern because the visual angle of observing is different, in the time that observation visual angle is offset two special angle direction sightingpistons gradually, two kinds of hidden patterns manifest also variation and disappearance gradually of sharpness, watch and only have along specific two the special angle directions of this coin, the hidden pattern of observing is the most clear.
Example three, the souvenir badge that certain coinage equipment company makes has two kinds of hiding hidden patterns (double-side hidden pattern) in this coin central circular, and the gradient angle of this souvenir badge double-side hidden pattern is 58 ° and is symmetrical arranged (referring to Fig. 7, Fig. 8).
In vertically observing from the top down this souvenir badge surface, can't see any special pattern (hidden pattern does not manifest).But, watch ［ by " with specific vertical plane (the being G-O-Y plane) direction of ridge face (being A-B-C-D plane) on mountain peak " along the specific direction of this coin, its ∠ β=∠ α=58 ° ］, can see in central circular the pattern that has " square and S letter ".In like manner, watch along the specific direction of the another side of this coin, can see the pattern that has " SCHULER " in same position central circular.
The gradient angle ∠ α of above-mentioned three kinds of coin (chapter) hidden patterns and hidden pattern thereof as shown in Figure 2, the angle parameter of the gradient angle ∠ α of above-mentioned three kinds of double-side hidden patterns arranges difference, only from two diverse locations, respectively identical specific direction (being ∠ β=∠ α) is watched with it, could reduce hidden pattern clearly.In like manner, in coin (chapter) multiaspect hidden pattern, three hidden patterns need to be from three of a coin diverse location, identical specific direction is watched with it respectively, just can see three kinds of hidden patterns.The method of watching of four sides and above hidden pattern the like.
The visual angle difference manifesting due to the different gradient angle ∠ α of coin hidden pattern, how simulating the clear reduction of human eye manifests to gather and becomes technological difficulties, how to comprise by " with specific vertical plane (the being G-O-Y plane) direction of ridge face (being A-B-C-D plane) on mountain peak ", make certain observation angle ∠ β equal the gradient angle ∠ α of hidden pattern.
So the detection of coin hidden pattern is more difficult than the detection of the conventional surface quality of existing coin, and need to adapt to multiple hidden pattern coin multi-form, different parameters.Thereby how in coinage is produced, the coin hidden pattern finished product of various forms and parameter being carried out to high-accuracy intelligent image acquisition detects the quality of controlling hidden pattern and becomes new technical barrier.
Chinese invention patent application 201110300870.7 relates to a kind of Coin detecting equipment, wherein adopts a component segmentation low angle annular light source, and double-side hidden pattern is detected.The image acquisition light source of this checkout equipment adopts circle distribution and interconnective multi-section circular arc lamp composition, but exist obviously not enough: though this light source adopts segmentation structure, but exist the direction of this incident ray direction and hidden pattern gradient angle to have certain angular deviation, this deviation makes to gather the sharpness variation of image.This interconnective multi-section circular arc lamp group (as: 12 sections) in practical application, as every section, further segmentation is overstocked again, certainly will every section lamp quantity few and produce luminance shortage and affect collection brightness; Every section excessively thin (as: 12 sections) irradiating angle is excessive; will certainly decline and affect collection sharpness with hidden pattern corresponding angle precision; thereby affect the clear reduction of hidden pattern product truth; cause detecting in coinage enterprise scale production the decline of yield rate, cannot meet the control requirement of quality conformance.
Because coin hidden pattern is the sight in order to increase false proof variability and enhancing coin, the performance of product hidden pattern has various forms.Such as: four sides hidden pattern, two groups of double-side hidden patterns that angle is different, can see different patterns from the four direction of coin circumference.Coinage enterprise is the needs that adapt to and meet various hidden pattern product expression forms, and in fact the acquisition testing application system of coin hidden pattern product also should comprise following content:
1, conventionally the gradient angle ∠ α of double-side hidden pattern the variation range of 45 ° to 60 °, the hidden pattern that how to meet various gradient angles image acquisition clearly in coinage is produced.
2, have the double-side hidden pattern (asymmetric the gradient angle design) of two kinds of different gradient angle ∠ α on one piece of coin surface, how to meet coinage produce in image acquisition clearly.As: on one piece of Coin two-sided hidden pattern surface, adopt respectively the hidden pattern of the gradient angle of ∠ α=45 ° and ∠ α=60 °, how to meet coinage produce in image acquisition clearly.
3, have multiaspect (three, on four sides) hidden pattern on one piece of coin surface or organize double-side hidden pattern (every group of gradient angle ∠ α difference) more, how to meet coinage produce in image acquisition clearly.
4, how to meet multiaspect hidden pattern, the more high-precision requirement (precision of the light source radiating angle in coin circumferencial direction X-O-Y plane) in the time that hidden pattern quantity increases, the accuracy of image acquisition light source incident direction and angle being proposed.
The image acquisition that how to realize the hidden pattern of above-mentioned various situations becomes new technical task, solve the sharpness problems of hidden pattern reduction, meet the true judgement of hidden pattern product sharpness, accurately judge the consistance of quality in production run, really reflect coinage produce in the authenticity of the impaired and attenuation degree of mould stealth, guarantee the control of quality in actual production.
Summary of the invention
The object of the present invention is to provide the high speed acquisition detection system of a kind of improved coin for multiaspect hidden pattern or chapter, it can overcome the sharpness deficiency that in prior art, hidden pattern reduces, cannot truly judge the sharpness of hidden pattern product, affect the some shortcomings of the quality monitoring in actual production.
To achieve these goals, technical scheme of the present invention is: for the high speed acquisition detection system of coin or the chapter of multiaspect hidden pattern, it is characterized in that: described high speed acquisition detection system comprises conveying belt and is located at preposition area array cameras and the detection faces array camera of conveying belt top, the bottom of preposition area array cameras is provided with preposition LED light source, and the below of detection faces array camera is provided with image acquisition light supply apparatus.
When use, preposition area array cameras and the detection faces array camera of being provided with of the present invention, the below of detection faces array camera is provided with image acquisition light supply apparatus, can clear reduction show various hidden patterns, eliminate the deviation between machine vision and human eye vision, thereby complete the at a high speed dynamically high precision image collection of the coin surface hidden pattern of this light-source system of input of random direction, comprise various gradient angles, multiaspect or organize the high precision image collection of coin surface hidden pattern more.The present invention is a kind of Intelligent light origin system that can simulate human eye completely, can realize high precision and detect the requirement of controlling, and light-source system simple and reliable for structure, fully meets the needs of production application.
An area array cameras that focuses on image acquisition light supply apparatus and top thereof of the present invention, image acquisition light supply apparatus above camera and below coin between.When duty, image acquisition light supply apparatus is coaxial with the camera of top, with coin almost coaxial (according to the quantity of stealthy face, trace biasing respectively, substep collection).Hidden pattern coin delivers into native system by belt conveyor high speed random direction, image acquisition light supply apparatus opens and closes in good time, the observation of simulation human eye and coin surface hidden pattern form specific angle and irradiate, catch whole coin hidden patterns that any direction enters, for the camera shooting, collecting respectively of the top perpendicular to coin product.
The surperficial hidden pattern of coin (chapter) that image acquisition light supply apparatus enters stochastic and dynamic illuminates clearly and shows, to reduce hidden pattern state originally, for gathering and detecting.Utilize the preposition camera of front end and under preposition LED light source illumination, provide the angle information of the surperficial hidden pattern of coin (chapter), coordinate accurately location coin to be checked (chapter) of sensor, to control the work of image acquisition light supply apparatus.
This system has realized the problem that cannot rely on artificial instant online detection and control in the hidden pattern large-scale production of coin surface, significantly cuts payroll to improve efficiency.Native system accuracy of detection is high, monitors the attenuation loss of mould, reduces the continuous generation of unacceptable product, guarantees the production control of hidden pattern coin homogeneity of product.
Accompanying drawing explanation
Fig. 1 is the structural representation of coin hidden pattern.
Fig. 2 is the another structural representation of coin hidden pattern.
Fig. 3 A, Fig. 3 B are 500 Yen of hidden patterns that coin circulation is observed under ° certain viewing angles of ∠ β=∠ α=46 of Japan.
Fig. 4 A, Fig. 4 B are 500 Yen of coin circulation patterns that (perpendicular to X-O-Y plane) observed under ° visual angle, ∠ β=∠ α=90 of Japan.
Fig. 5, Fig. 6 are that Spain's 1996 Olympic Games commemorative coin is observed hidden pattern under ° certain viewing angles of ∠ β=∠ α=51.
Fig. 7, Fig. 8 observe hidden pattern under certain coinage equipment company souvenir badge ∠ β=∠ α=58 ° certain viewing angles of making.
Fig. 9 is the structural representation of one embodiment of the invention.
Figure 10 is the another structural representation of one embodiment of the invention.
Figure 11 is the cut-open view of individual layer image acquisition light supply apparatus of the present invention.
Figure 12 is the cut-open view that the present invention's two tomographic images gather light supply apparatus.
Figure 13 is the cut-open view that the present invention's three tomographic images gather light supply apparatus.
Figure 14 is the structure elevational schematic view that the present invention's two tomographic images gather light supply apparatus.
Figure 15 is that the use state of the present invention's two tomographic images collection light supply apparatuses is overlooked reference diagram.
Figure 16 is that the another use state of the present invention's two tomographic images collection light supply apparatuses is analysed and observe reference diagram.
Figure 17 is the circuit diagram of the LED light source string of image acquisition light supply apparatus of the present invention.
Figure 18 is the arrangement schematic diagram of the LED light source array of image acquisition light supply apparatus of the present invention.
Figure 19 is that the stealthy coin embodiment in four sides that the present invention detects illustrates schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
In each accompanying drawing, mark is expressed as follows: 1 current-limiting resistance R, 2LED light source monomer, 3 current-limiting resistance R1, 4 contactor K, 5 contactor K1, 6 contactor K2, 7 current-limiting resistance R2, 8 conveying belt, 9 preposition area array cameras, 10 detection faces array cameras, 11 preposition LED light sources, 12 image acquisition light supply apparatuses, 13 annular cones body support frames, 14LED integral light source, 15LED string of light, 16 LED light source arrays, 17 stealthy coins, 18 first LED light source arrays, 19 second LED light source arrays, 20 the 3rd array of source, 21 ridge faces.
Do an explanation with regard to each accompanying drawing content below:
In Fig. 1, on the ridge face on stealthy coin mountain peak, set up three-dimensional system of coordinate, wherein: OG is positioned at X-O-Z plane, X-O-Y plane and coin C-D-M plane parallel, and the parallel CD of OY, the vertical CD of OX.Viewing angle ∠ XOG=∠ β, stealthy gradient angle ∠ DAE=∠ α.
When viewing angle ∠ β equals gradient angle ∠ α, can be at the hidden pattern of the clear demonstration coin of viewing angle (∠ β=∠ α).
Double-side hidden shown in Fig. 1: stealthy gradient angle ∠ DAE=∠ α, ∠ FAE=∠ α
1, as ∠ DAE=∠ α ≠ ∠ FAE=∠ α
1time, be the asymmetric double-side hidden pattern that arranges, need respectively with ∠ β=∠ α and ∠ β=∠ α
1angle observe, with the coin hidden pattern of two different slope angles of clear demonstration.
The like, three stealths and multiaspect hidden pattern, at the ridge face on 360 ° of set one group of mountain peaks of all directions of X-O-Y plane, could clearly observe hidden pattern by above-mentioned different specific direction and visual angle as required.
In Fig. 3, Fig. 4,500 Yen of coin circulations of Japan are concealed with two kinds of hidden patterns (double-side hidden pattern), double-side hidden gradient angle ∠ DAE=∠ FAE=∠ α=46 °, symmetrical slope angle setting in 500 two " 0 ".With perpendicular to X-O-Y viewed in plan, have no hidden pattern (seeing Fig. 4 A, Fig. 4 B).With " with specific vertical plane (the being G-O-Y plane) direction of ridge face (being A-B-C-D plane) on mountain peak ", and ∠ β=∠ α=46 ° observation, hidden pattern is as shown in Fig. 3 A, Fig. 3 B clearly.
Fig. 5, Tu6Zhong Shi Spain 1996 Olympic Games commemorative coin have hiding two kinds of hidden patterns (double-side hidden pattern) in this commemorative coin olive shape region, double-side hidden gradient angle ∠ DAE=∠ FAE=∠ α=51 °, symmetrical slope angle setting.With " with specific vertical plane (the being G-O-Y plane) direction of ridge face (being A-B-C-D plane) on mountain peak ", and ∠ β=∠ α=51 ° observation, hidden pattern is as shown in Figure 5, Figure 6 clearly.
The souvenir badge that Fig. 7, Tu8Zhong Shimou coinage equipment company make has hiding two kinds of hidden patterns (double-side hidden pattern), double-side hidden gradient angle ∠ DAE=∠ FAE=∠ α=58 °, symmetrical slope angle setting in the said firm's souvenir badge central circular.With " with specific vertical plane (the being G-O-Y plane) direction of ridge face (being A-B-C-D plane) on mountain peak ", and ∠ β=∠ α=58 ° observation, hidden pattern is as shown in Figure 7, Figure 8 clearly.
In Figure 15, Figure 16, be installed on 2 layers of LED integral light source on annular cones body support frame inwall and be made up of patch-type LED monomer, each LED integral light source has independent power supply lead wire.The double-side hidden coin of asymmetric slope angle is positioned at light source below, and annular cones body support frame is 2 laminar composite structures, and the half of coning angle ∠ γ is respectively ∠ γ
1/ 2 and ∠ γ
2/ 2, respectively with the asymmetric gradient angle of double-side hidden ∠ α
1with ∠ α
2be consistent, i.e. array of source 1 and array of source 2 illumination angle ∠ β 1=∠ α
1with ∠ β 2=∠ α
2.
Every layer of upper 4 pieces of LED light source monomer composition LED light source string, also divide four layers of consistency from top to bottom arrange and be uniformly distributed along 360 ° of directions on annular cones body wall separately, every layer of upper two LED light source string of arbitrary neighborhood can form a LED light source array and ［ be illustrated as 360 ° every layer distribute 80 LED integral light source bodies composition string in cone, two LED light source strings form a LED light source array, the irradiation angle of light source display is 9 °, be that circumferencial direction can form arbitrarily 40 LED light source arrays, irradiating angle precision is 4.5 ° ］, to obtain to greatest extent stealthy effect image truly.
In Figure 17, L1 is LED monomer illumination light subject string, and N LED monomer illumination light subject string is set as required, as N=80, and N=100 etc.The control of each LED monomer illumination light subject string: by difference control circuit K switch, K1 and K2, the quantity of the LED monomer in increase and decrease LED string, the size of adjusting exposure intensity.As, disconnection K1 and K2 are set and only open and close separately K, reach 4 pieces of LED monomer illumination works in LED string; And for example, disconnection K and K2 are set and only open and close separately K1, reach 3 pieces of LED monomer illumination works in LED string; For another example, disconnection K and K1 are set and only open and close separately K2, reach 2 pieces of LED monomer illumination works in LED string.
In Figure 18, by any one array of source, (2 string of lights are formed the first LED light source array, 3 string of lights can be set as required to be formed), the second LED light source array be with the stealthy coin pattern ridge face of this angle on the C-D straight line array of source that forms the angle that approaches 90 ° most ［ see shown in figure mono-, the C-D straight line of secondary light source array plane vertical (or the most approaching vertical) in coin C-D-M plane ］, this figure for distributing 80 string of lights (being N=80) on 360 ° of circumference of light-source system, and angle precision is controlled in 4.5 °.The 3rd LED light source array is another array of source of choosing at random arbitrarily.By electric-controlled intelligent system, can open and close arbitrarily and face mutually two (N and N-1) LED light source string institute LED light source consisting arrays, as: the 5th and the 6th; Or the 6th and the 7th, effectively improve the angle precision irradiating, and reach intelligent control.
In Figure 19, be that certain contains four sides hidden pattern coin product, this four sides hidden pattern is positioned at four quadrant positions (90 ° uniform) of the same area X-O-Y in-plane, hidden pattern gradient angle α
1=46 °, hidden pattern gradient angle α
2=58 °, hidden pattern gradient angle α
3=46 °, hidden pattern gradient angle α
4=58 °.
The present invention mainly comprises that described high speed acquisition detection system comprises conveying belt and the preposition area array cameras and the detection faces array camera that are located at conveying belt top, the bottom of preposition area array cameras is provided with preposition LED light source, and the below of detection faces array camera is provided with image acquisition light supply apparatus.Because conveying belt, preposition area array cameras and preposition LED light source are prior art, just repeat no more its principle of work here.
Described image acquisition light supply apparatus is made up of support and the LED integral light source that is located at rack inner wall, and 4 LED integral light sources form LED light source strings; Described support is composited by individual layer or the splicing of layer 2-3 sub-stent.Single-layer bracket the corresponding hidden pattern coin detecting be provided with one group of stealthy ridge, described stealthy ridge by 2 stealthy ridge faces of symmetry or only 1 stealthy ridge face (on another ridge face, stealth not being set) form, the gradient angle of stealthy ridge is α angle; Described single-layer bracket is annular cones body support frame, the profile of annular cones body support frame is that right cylinder, inner chamber are cone, the angle of the coning angle γ of annular cones body support frame is the twice (that is: coning angle γ/2=gradient angle ∠ α) of the angle of detected coin hidden pattern gradient angle α, and the irradiating angle β of each LED integral light source and the light source radiating angle face of formation are perpendicular to stealthy ridge face.
In like manner, 2 layers of sub-stent the corresponding hidden pattern coin detecting be provided with the stealthy ridge of 2 groups of different angles, 2 groups of described stealthy ridge faces are made up of 2 stealthy ridge faces or 4 symmetrical stealthy ridge faces respectively, and each stealthy ridge is to there being a gradient angle α angle; 3 layers of sub-stent the corresponding hidden pattern coin detecting be provided with the stealthy ridge of 3 groups of different angles, 3 groups of described stealthy ridge faces are made up of 3 stealthy ridge faces or 6 symmetrical stealthy ridge faces respectively, and each stealthy ridge is to there being a gradient angle α angle; Described support is composited by the splicing of layer 2-3 annular cones body sub-stent, the profile of support is that right cylinder, inner chamber are the cone of composite double layer or three layers, the angle of the coning angle γ of every one deck is the twice of the angle of detected coin hidden pattern gradient angle α, and the irradiating angle β of the single led integral light source of every one deck and the light source radiating angle face of formation are perpendicular to the corresponding stealthy ridge face of gradient angle of required detection.In single-layer bracket, be arranged on the LED integral light source of rack inner wall, divide four layers of consistency from top to bottom to arrange along annular cones body wall separately, be evenly distributed in the annular ring of 360 degree, the equidistant one group of LED light source string of rear formation of arranging of every 4 LED integral light sources, described string of light is uniformly distributed along the cone inwall of support; In layer 2-3 support, every one deck rack inner wall is equipped with LED integral light source, and every 4 LED integral light sources are equidistant forms one group of LED light source string after arranging, and described string of light is uniformly distributed along 360 ° of the cone inwalls of support.Adjacent 2-3 group string of light is combined into a LED light source array, and each string of light has independent power supply lead wire.Preposition area array cameras and preposition LED light source coaxially arrange, and detection faces array camera and image acquisition light supply apparatus coaxially arrange.
Each LED monomer lighting source on single-layer bracket cone guarantees that the light direction of illumination of each LED monomer lighting source and the ridge face on hidden pattern mountain peak are vertical after installing.Each LED monomer lighting source on compound rest cone guarantees that the light direction of illumination of each LED monomer lighting source in every group is vertical with the ridge face on hidden pattern mountain peak separately, to obtain high-quality stealthy effect image truly after installing.
Described image acquisition light supply apparatus also comprises the intelligent control system of LED light source serializer circuit and LED light source array, the high-brightness LED monomer of this annular light source can be made up of patch-type LED monomer, each LED lighting source monomer has independent power supply lead wire, the LED illumination light subject string of each row all can be realized independent control according to control signal, LED illumination light subject string need to be arranged to the form that 2 (layers) or 3 (layer) or 4 (layer) open and close according to lightness, gather the needs of brightness to adapt to different product.The circuit of LED illumination light subject string comprises the LED of four high brightness, three current-limiting resistances and three circuit controling switch, and LED light source serializer circuit is shown in Figure 17.
Two (or three) LED light source string LED light source consisting arrays of arbitrary neighborhood in cone.The electrical control of whole light-source system adopts PLC or Single Chip Microcomputer (SCM) system Based Intelligent Control, and the LED light source array of any one this light-source system in annular cones body can arbitrarily be opened and disconnect to this Intelligent electronic control system.The irradiation angle forming due to two (or three) LED light source strings of arbitrary neighborhood is very little, has effectively improved the angle precision irradiating.
Take practical application as example: in cone, 360 ° every layer 100 the LED light source string that distributes are example, the irradiation angle that two LED light source strings form is only 7.2 ° (360 °/50 array of source), circumferencial direction angle precision is controlled in 3.6 ° (360 °/100 string of lights), hidden pattern is very clearly thrown light on and manifest and supply collection, make accuracy of detection very high.
The quantity that image acquisition light supply apparatus can be opened LED monomer layer in LED light source array according to the corresponding adjustment of the size of check pattern, open 2 layers or 3 layers or 4 layers, to strengthen the exposure intensity of LED array entirety, meet the needs of dissimilar hidden pattern product, what assurance coin surface hidden pattern was clear and stable manifests effect, and the image of being convenient to collection and later stage is processed judgement.
In the time that surperficial hidden pattern coin product passes through the preposition area array cameras of native system with random angle, after the image that preposition area array cameras obtains, the angle information of system-computed hidden pattern coin product surface also sends control signal, controls detection camera and image acquisition light supply apparatus and carries out opening and closing.Control signal comprises locating information, array of source control information.
Locating information: accurately control camera and take and the light source time shutter.
Gather hidden pattern and 360 ° of circumference angle precisions of light-source system: be divided into two kinds of forms, 1. preposition camera is according to after angle information, determine high-precision intelligent annular image gathers which LED monomer lighting source array in light source (single angle type) 360 ° and approaches the angle (that is: the C-D straight line on light source radiating angle face vertical ridge face A-B-C-D and ridge face) of 90 ° most with the hidden pattern ridge face formation of this angle, more approach 90 °, precision higher.On 360 ° of circumference of light-source system, distribute 80 string of lights as example, angle precision is controlled in 4.5 °.
2. preposition area array cameras according to angle information determine high-precision intelligent annular image gather in light source (compound angle type) position, upper, middle and lower separately which LED light source array approach the angle (that is: the C-D straight line on light source radiating angle face vertical ridge face A-B-C-D and ridge face) of 90 ° most with the hidden pattern ridge face formation of this angle separately, more approach 90 °, precision higher.On 360 ° of circumference of light-source system, distribute 80 string of lights as example, angle precision is controlled in 4.5 °.
Array of source control information: control the opening and closing of a LED light source array of corresponding arbitrary neighborhood.By array of source control of arbitrary neighborhood, the blink at coin product by this station, substep completed the illumination of the clear demonstration of hidden pattern successively, completes shooting, collecting for several times by step in section.
System is determined the shooting number of times of stealthy detection camera according to the quantity of hidden pattern, stealthy detection camera is high-speed capture several hidden patterns corresponding with the quantity of hidden pattern successively, and whole gatherer process all completes under fast state.
This light-source system is debugged and is tested gathered hidden pattern product in advance, to select to determine the brightness of illumination of LED light source array.Determine LED light source string is arranged to the form of 2 (layers) or 3 (layer) or 4 (layer) keying and control system is arranged according to test result.Control system, by the control to whole light-source system, gathers the needs of brightness to adapt to different product.
1, the double-side hidden pattern of acquisition testing 500 Japanese yen coins, this double-side hidden pattern is for being symmetrical arranged, hidden pattern gradient angle α=46 °, 180 ° of distributions of double-side hidden pattern X-O-Y in-plane (referring to Fig. 3 A, Fig. 3 B)
2, product diameter of phi 26.5mm, acquisition testing processing speed is 600 pieces/minute.
3, adopt 5,000,000 pixel resolutions to gather camera, below is placed high-precision intelligent annular image and is gathered light source (single angle type) system.SMD highlighted LED evenly installs and is distributed on the inwall of annular cones body support frame.
Design parameter:
Annular cones body support frame cone angle γ=46 ° × 2=92 °
Annular cones body support frame diameter of phi=150 mm
One week " LED monomer lighting source " number=80 of annular cones body
Quantity=4 (layer) of " LED monomer lighting source " on each LED light source string
Unlatching quantity=3 (layer) of " LED monomer lighting source " on each LED light source string
In cone, two LED light source strings of arbitrary neighborhood form the LED light source array of this light-source system.
Irradiation angle=9 ° that LED light source array (two LED light source strings) forms, double-side hidden pattern X-O-Y in-plane angle precision=4.5 °.
4,, by the control of array of source control system, the blink at 500 Japanese yen coins by native system, point two steps completed the display lighting of double-side hidden clear patterns, complete secondary shooting, collecting successively by level in section.
500 Japanese yen coins enter native system, determine coin pattern angles by preposition camera, open two groups of (180 ° of directions) LED monomer lighting source arrays by double-side hidden direction by immediate angle substep, substep shooting, collecting hidden pattern; Reach the collection of 500 yen of double-side hidden full details.
1, acquisition testing certain contain four sides hidden pattern coin product, this four sides hidden pattern is positioned at four quadrant positions (90 ° are uniform) of the same area X-O-Y in-plane, hidden pattern gradient angle α
1=46 °, hidden pattern gradient angle α
2=58 °, hidden pattern gradient angle α
3=46 °, hidden pattern gradient angle α
4=58 ° (seeing Figure 19).
2, product diameter of phi 25mm, acquisition testing processing speed is 600 pieces/minute.
3, adopt 5,000,000 pixel resolutions to gather camera, below is placed high-precision intelligent annular image and is gathered light source (compound angle type) system.SMD highlighted LED evenly installs and is distributed on two layers of inwall of annular compound shape cone support.
Design parameter:
1=46 ° × 2=92 ° of annular cones body support frame cone angle γ
2=58 ° × 2=116 ° of annular cones body support frame cone angle γ
Annular cones body support frame diameter=188 mm
One week " LED monomer lighting source " number=100 of annular cones body
Quantity=4 (layer) of " LED monomer lighting source " on each LED light source string
Unlatching quantity=4 (layer) of " LED monomer lighting source " on each LED light source string
In cone, two LED light source strings of arbitrary neighborhood form the LED light source array of this light-source system.
Irradiation angle=7.2 ° that LED light source array (two LED light source strings) forms, hidden pattern X-O-Y in-plane angle precision=3.6 °, four sides.
4,, by the control of array of source control system, the blink at this four sides hidden pattern coin product by native system, point four steps completed the display lighting clearly of four sides hidden pattern, complete shooting, collecting four times successively by level in section.
This four sides hidden pattern coin product introduction native system, determines coin pattern angles by preposition camera, opens four groups of LED light source arrays, substep shooting, collecting hidden pattern by the stealthy direction in four sides by immediate angle substep; Reach the collection of this stealthy full detail in hidden pattern coin product four sides, four sides.
Advantage of the present invention:
1. high-precision intelligent annular image gathers that light-source system hardware is few and volume is little, cost performance is high
High-precision intelligent annular image gathers that light-source system hardware is few and volume is little, cost performance is high, is extremely conducive to the online acquisition examination and controlling in practical application, particularly production line that coinage produces.
2, high-precision intelligent annular image gathers light-source system wide adaptability, meets high speed acquisition
Use high-precision intelligent annular image to gather light-source system, can realize any direction, the whole of multiaspect hidden pattern coin gather clearly and detect, the illumination array high precision of light-source system intelligent control.System acquisition detection speed can reach 700 pieces/minute, adapts to the demand of coin circulation scale mass production applications.
3. high-precision intelligent annular image collection light-source system practicality is good
It is accurately high that high-precision intelligent annular image gathers light-source system control, gathers clear picture reliable, and station or double setting separately as required arranges the coin of surperficial hidden pattern to detect one side or the positive back side.
Be conducive to utilization and the integration with existing checkout equipment.
Claims (7)
1. the high speed acquisition detection system of the coin for multiaspect hidden pattern or chapter, it is characterized in that: described high speed acquisition detection system comprises conveying belt and is located at preposition area array cameras and the detection faces array camera of conveying belt top, the bottom of preposition area array cameras is provided with preposition LED light source, and the below of detection faces array camera is provided with image acquisition light supply apparatus.
2. for a high speed acquisition detection system for coin or the chapter of multiaspect hidden pattern, it is characterized in that: described image acquisition light supply apparatus is made up of support and the LED integral light source that is located at rack inner wall, and 4 LED integral light sources form LED light source strings; Described support is composited by individual layer or the splicing of layer 2-3 sub-stent.
3. the high speed acquisition detection system of a kind of coin for multiaspect hidden pattern according to claim 2 or chapter, it is characterized in that: single-layer bracket the corresponding hidden pattern coin detecting be provided with one group of stealthy ridge, described stealthy ridge is made up of 1 stealthy ridge face or 2 symmetrical stealthy ridge faces, and the gradient angle of stealthy ridge is α angle; Described single-layer bracket is annular cones body support frame, the profile of annular cones body support frame is that right cylinder, inner chamber are cone, the angle of the coning angle γ of annular cones body support frame is the twice of the angle of detected coin hidden pattern gradient angle α, and the irradiating angle β of each LED integral light source and the light source radiating angle face of formation are perpendicular to stealthy ridge face.
4. the high speed acquisition detection system of a kind of coin for multiaspect hidden pattern according to claim 2 or chapter, it is characterized in that: 2 layers of sub-stent the corresponding hidden pattern coin detecting be provided with the stealthy ridge of 2 groups of different angles, 2 groups of described stealthy ridge faces are made up of 2 stealthy ridge faces or 4 symmetrical stealthy ridge faces respectively, and each stealthy ridge is to there being a gradient angle α angle; 3 layers of sub-stent the corresponding hidden pattern coin detecting be provided with the stealthy ridge of 3 groups of different angles, 3 groups of described stealthy ridge faces are made up of 3 stealthy ridge faces or 6 symmetrical stealthy ridge faces respectively, and each stealthy ridge is to there being a gradient angle α angle; Described support is composited by the splicing of layer 2-3 annular cones body sub-stent, the profile of support is that right cylinder, inner chamber are the cone of composite double layer or three layers, the angle of the coning angle γ of every one deck is the twice of the angle of detected coin hidden pattern gradient angle α, and the irradiating angle β of the single led integral light source of every one deck and the light source radiating angle face of formation are perpendicular to the corresponding stealthy ridge face of gradient angle of required detection.
5. the high speed acquisition detection system of a kind of coin for multiaspect hidden pattern according to claim 2 or chapter, it is characterized in that: in single-layer bracket, be arranged on the LED integral light source of rack inner wall, the equidistant one group of LED light source string of rear formation of arranging of every 4 LED integral light sources, described string of light is uniformly distributed along the cone inwall of support; In layer 2-3 support, every one deck rack inner wall is equipped with LED integral light source, the equidistant one group of LED light source string of rear formation of arranging of every 4 LED integral light sources, and described string of light is uniformly distributed along the cone inwall of support.
6. the high speed acquisition detection system of a kind of coin for multiaspect hidden pattern according to claim 5 or chapter, it is characterized in that: each string of light has independent power supply lead wire, the circuit of each LED light source string comprises four LED monomers, three current-limiting resistances and three circuit controling switch, and the 2-3 group string of light of arbitrary neighborhood is combined into a LED light source array.
7. the high speed acquisition detection system of a kind of coin for multiaspect hidden pattern according to claim 1 or chapter, is characterized in that: preposition area array cameras and preposition LED light source coaxially arrange, detection faces array camera and image acquisition light supply apparatus coaxially arrange.
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| CN110933927A (en) * | 2018-09-20 | 2020-03-27 | 梭特科技股份有限公司 | Die attaching position positioning device capable of improving mask contrast |
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| CN103792241B (en) | 2016-08-31 |
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Address after: 200061 No. 17 Guangfu West Road, Shanghai, Putuo District Patentee after: SHANGHAI MINT Co.,Ltd. Patentee after: China Banknote Printing and Minting Group Co.,Ltd. Address before: 200061 No. 17 Guangfu West Road, Shanghai, Putuo District Patentee before: SHANGHAI MINT Co.,Ltd. Patentee before: CHINA BANKNOTE PRINTING AND MINTING Corp. |