A device for identifying infrared invisible codes on the surface of reflective packaging materials

Abstract

The present invention relates to a device for identifying invisible codes on the surface of reflective packaging materials, comprising a housing, an electronic image processing module including an electronic identification module installed on the housing, and an electronic camera. An 850nm or 900nm infrared LED lamp bead is arranged on the electronic image processing module. Two layers of combined boards consisting of a diffusion film and a diffusion plate are arranged in front of the infrared LED lamp bead, one layer is close to the lamp bead, and the other layer is above a lens shading baffle with an opening. Infrared light is evenly emitted to the surface of the reflective packaging material through the two layers of combined boards. The electronic camera adopts a conical lens, which is directly opposite to the opening of the shading baffle. The installation angle of the lens is the minimum angle to avoid the lens umbra, and the observable range on the surface of the reflective packaging material is about 15*10mm, which can be appropriately adjusted according to the design size of the invisible code. The present invention is easy to carry and maintain, and solves the reflection problem of the lens umbra and the point light source on the surface of the reflective packaging material.

Description

Technical Field

[0001] The invention relates to anti-counterfeiting technology, in particular to a device for identifying infrared invisible codes on the surface of reflective packaging materials. Background Art

[0002] Commodity anti-counterfeiting is mostly achieved by using ink, paper and digital codes, which not only meet the needs of general public identification, but also meet the regulatory arbitration role of government departments, and accurately identify the authenticity through the particularity and personalization of anti-counterfeiting information. This is the new concept of modern anti-counterfeiting, that is, the combination of first-line public anti-counterfeiting, second-line instrument identification and third-line expert intelligent identification anti-counterfeiting, taking the path of comprehensive anti-counterfeiting technology.

[0003] Recently, invisible code technology using infrared ink to print digital codes has gradually become a development direction and is one of the effective methods to fundamentally eliminate fake anti-counterfeiting labels. The invisible code is to load the personalized data of the invisible code on the paper medium. In the existing printing environment, the special digital anti-counterfeiting code conversion and coding program developed by the applicant is used to realize the printing of the encrypted invisible code on the surface of the label or packaging box, and the relevant content information of the invisible code is analyzed by the special identification instrument of the applicant.

[0004] The existing anti-counterfeiting printing technology can be generally divided into two types: explicit and implicit. Explicit: consumers can identify the authenticity with their naked eyes, temperature, or light without the need for special tools. Implicit: professionals use special tools to identify the authenticity. While solving the problem of consumers' naked eye identification, how can we also meet the audit and identification requirements of managers, while not being easily forged and impossible for counterfeiters to copy. Providing information support for quality traceability, recall, and anti-counterfeiting for auditors is what technicians in the field pursue.

[0005] In the application process, in order to reduce costs and labeling workload, the invisible code of the product is directly sprayed on the surface of the product packaging material. For the sake of aesthetics, many packaging materials use various types of reflective packaging materials. When infrared invisible ink is sprayed on the surface of the reflective packaging material, when an ordinary electronic identification device is used to read the sprayed invisible code, strong reflection will occur, making it impossible for the electronic camera to obtain valuable pictures, and thus impossible to parse and identify the invisible code through image recognition. How to solve the problem of identifying the invisible code sprayed on the surface of reflective packaging materials is a technical problem.

[0006] Technical terms:

[0007] 1. Invisible code technology: Invisible code is an information embedding code that takes into account the characteristics of the printing screen or inkjet equipment. Invisible code is different from two-dimensional barcodes in that it can embed a large amount of information without a specific space. Printed materials use dots to depict images, but on the surface of printed materials, we cannot see these small dots with our naked eyes. So, if we record information by changing the geometric or physical form of these small dots without changing the grayscale value of the dots, we can not only do not destroy the quality of the printed image, but also record information in an invisible form to replace the barcode. Invisible code is developed based on this idea. For example, by changing the different positions, directions, shapes of dots, or breaking up the dots, information can be well hidden in the image.

[0008] 2. Backlight technology:

[0009] 1) Liquid Crystal Display, or LCD (Liquid Crystal Display) is a non-luminous display device that requires the help of a backlight source to achieve its display function. In addition to directly affecting the LCD display quality, the performance of the backlight source accounts for 3-5% of the LCD module's cost and consumes 75% of the LCD module's power, making it a very important component in the LCD module. High-precision, large-size LCDs must be matched with high-performance backlight technology. Therefore, while the LCD industry is working hard to open up new application areas, the high performance of backlight technology (such as high brightness, low cost, low power consumption, and thinness) also plays a role behind the scenes.

[0010] 2) Light source composition, mainly composed of light source, light guide plate, optical film, plastic frame, etc. The backlight source has the characteristics of high brightness, long life, and uniform light emission. At present, there are three main types of backlight sources: EL, CCFL and LED. According to the different distribution positions of the light source, they are divided into side-lit and direct-lit types. As LCD modules continue to develop towards brighter, lighter and thinner directions, side-lit CCFL backlight sources have become the mainstream of backlight development. Among them, the electroluminescent (EL) backlight source is thin and light, and the light it provides is uniform and consistent. Its power consumption is very low, and the required working voltage is 80~100Vac. The inverter that provides the working voltage can convert the input of 5 / 12 / 24Vdc into AC output. However, the service life of the EL backlight source is limited (the average service life is 3000~5000 hours under 50% brightness conditions, and the service life will be greatly shortened at a higher brightness level). Therefore, the ideal EL backlight inverter allows the output voltage and frequency to increase with the aging of the EL bulb, thereby extending the effective service life of the display using the EL backlight source.

[0011] EL backlighting is suitable for small reflective LCD applications such as watches, digital desk clocks and monochrome PDAs that require extremely weak illumination for use in dim or dark conditions. However, low efficiency, low brightness and short life make it unsuitable for transmissive backlighting applications such as large LCDs required for laptops and flat-panel desktop monitors.

[0012] LED backlights have a longer lifespan than EL (over 5,000 hours) and use DC voltage, and are usually used in small monochrome displays, such as telephones, remote controls, microwave ovens, air conditioners, instruments, stereo audio equipment, etc. However, their brightness is currently not enough to provide backlight for large transmissive displays. The structure of LED backlights and CCFL backlights is basically the same, with the main difference being that LEDs are point light sources, while CCFLs are line light sources.

[0013] Small cold cathode fluorescent lamps (CCFLs) offer the brightness and longevity (and light control capabilities) needed for large LCDs, which is why they remain the most common method of backlighting. However, heat buildup is a concern.

[0014] 3) Light guide plate, used to guide the scattering direction of light, to improve the brightness of the panel and ensure the uniformity of the panel brightness. The quality of the light guide plate has a great impact on the backlight plate. Therefore, the design and production of the light guide plate in the edge-lit backlight plate is one of the key technologies. The light guide plate is made by extrusion molding to press acrylic into a smooth plate. Then, a material with high reflection and no light absorption is used to print diffusion points on the bottom of the light guide plate by screen printing. The cold cathode fluorescent lamp is located at the thick end of the side of the light guide plate. The light emitted by the cold cathode tube is transmitted to the thin end by reflection. When the light hits the diffusion point, the reflected light will diffuse to all angles, and then destroy the reflection conditions and be emitted from the front of the light guide plate. Using various dense and different-sized diffusion points, the light guide plate can emit light evenly. The purpose of the reflector is to reflect the light exposed from the bottom back into the light guide plate to improve the efficiency of light use.

[0015] According to different process flows, light guide plates can be divided into printed and non-printed types. The printed type uses a material with high reflectivity and no light absorption on an acrylic flat plate, and prints circular or square diffusion points on the bottom of the light guide plate by screen printing. The non-printed type uses a precision mold to add a small amount of granular material with different refractive indices to the acrylic material during injection molding of the light guide plate, directly forming dense tiny convex dots, which act like dots. The effect of the printing method is not as good as the non-printing method. The non-printing method has excellent results, a small number of users, fast speed, and high efficiency, but the technical threshold is very high, and it requires mastering precision injection molding, precision molds, optics and other technologies to master. At present, most domestic manufacturers still use printed light guide plates as light guide components. Printed light guide plates have the advantages of low development cost and fast production, while non-printed light guides have higher technical difficulty, but they perform well in brightness.

[0016] Existing technical bottlenecks: According to the shape, it can be divided into flat plates and wedge plates. Flat plates are mostly used in monitors, and wedge plates are mostly used in notebook computers. As for the main purpose of the diffusion plate, it is to increase the brightness of the front. The diffusion plate makes the light distribution more uniform, and the shadow of the reflection point cannot be seen from the front. Since the light is very poorly directed after it is emitted from the diffusion plate, it is necessary to use a prism to correct the direction of the light to achieve the effect of focusing and increase the brightness of the front.

[0017] It can be seen that the role of the backlight module is nothing more than to transform the light emitted by a point light source or a line light source into a surface light source through diffuse reflection. However, when different numbers of lamps are matched, the texture of the surface will change differently. The design of the backlight panel covers optical design, precision molds, etching, printing and other precision technologies.

[0018] 4) Diffusion film. The basic structure of most diffusion films is to coat optical light-scattering particles on both sides of a transparent substrate such as a PET film. When light passes through the diffusion layer with PET as the substrate, it will pass through the medium with different refractive indices, causing many refractions, reflections and scattering phenomena of the light, which can correct the light into a uniform surface light source to achieve the effect of optical diffusion.

[0019] In the backlight structure, it mainly plays the role of correcting the diffusion angle, which will increase the light radiation area, but reduce the light intensity per unit area, that is, reduce the brightness. After the light source is diffused by the diffusion material, it can become a secondary light source with a larger area, better uniformity, and stable chromaticity. It has the function of diffusing light, that is, the light will be scattered on its surface, and the light will be spread softly and evenly.

[0020] LCD displays are classified into two types: side projection and direct-down. The diffusion material used for side projection is called diffusion film (or diffusion sheet); in direct-down backlight light sources, two types of diffusion materials are used, one is diffusion film and the other is diffusion plate. The important indicators of diffusion film are total light transmittance and haze. The function of XLK100 diffusion film is to provide a uniform surface light source for liquid crystal display. Generally, the traditional XLK100 diffusion film mainly adds chemical particles to the diffusion film substrate as scattering particles, and the existing diffusion plate has its particles dispersed between the resin layers. Therefore, when the light passes through the diffusion layer, it will continuously pass through two media with different refractive indices, so the light will undergo many refractions, reflections and scattering phenomena, thus creating an optical diffusion effect. Under normal circumstances, the backlight module requires two diffusion films, upper and lower. The upper diffusion film is close to the observer's line of sight, has high quality requirements and low tolerance for defects, and its price is higher than that of the lower diffusion film.

[0021] 5) Separation membrane, a metal membrane with a microporous structure. The micropores can restrict the normal gas flow and allow the diffusion flow to pass through, so the mass difference can be used to separate isotopes. For example, when separating uranium isotopes by gas diffusion, the separation membrane is mostly made of sintered nickel, and some are made of ceramic or polytetrafluoroethylene. There are hundreds of millions of micropores per square centimeter of the membrane, with a pore size of about 0.01-0.03 microns. They must meet the requirements of the separation process and still maintain stability, reliability and a certain mechanical strength in the hot and corrosive uranium hexafluoride process gas.

[0022] The light source processing form in the traditional electronic image recognition device does not meet the requirements for the electronic image recognition of invisible codes on the surface of reflective packaging materials; the camera itself has an umbra on the surface of reflective packaging materials, which affects the subsequent image recognition effect. The new light source structure design solves the reflection problem of point light sources on the surface of reflective packaging materials.

[0023] Special light source processing and image recognition methods are required to obtain a satisfactory electronic photo of the invisible code on the surface of the reflective packaging material, so as to parse the encrypted invisible code content through image recognition technology. Summary of the invention

[0024] The purpose of the present invention is to provide an infrared invisible code recognition device for the surface of reflective packaging materials, which solves the reflection problem of the lens umbra and the point light source on the surface of the reflective packaging material through special lens processing and observation angle changes, thereby obtaining a relatively clear invisible code electronic image.

[0025] Another object of the present invention is to provide an application method of the above-mentioned infrared invisible code recognition device on the surface of reflective packaging materials, and the device can also be used for invisible code recognition on the surface of ordinary materials.

[0026] The object of the present invention is achieved through the following scheme: a device for identifying infrared invisible codes on the surface of reflective packaging materials, wherein the target identification plane is the surface of the reflective packaging material, comprising a housing, an electronic image processing module mounted on the housing, and an electronic camera, wherein:

[0027] An 850nm or 900nm infrared LED lamp bead is arranged on the electronic image processing module, and two layers of combined boards consisting of a diffusion film and a diffusion plate are arranged in front of the infrared LED lamp bead, one layer is close to the lamp bead, and the other layer is on the lens shading baffle with an opening, and the infrared light is evenly emitted to the surface of the reflective packaging material through the two layers of combined boards;

[0028] The electronic camera adopts a conical lens, which faces the opening of the shading baffle. The installation angle of the lens is the minimum angle to avoid the lens umbra, and the observable range on the surface of the reflective packaging material is about 15*10mm, which can be appropriately adjusted according to the design size of the invisible code.

[0029] The present invention refers to the relevant processes and materials in the liquid crystal screen manufacturing process, and designs a new type of electronic recognition device for invisible codes on the surface of reflective materials. By using a combination of a diffusion film and a diffusion plate, the light of LED infrared lamp beads is evenly irradiated on the surface of the reflective material; in addition, by changing the observation angle of the electronic camera, the umbra of the lens on the surface of the reflective material is avoided, so as to obtain an electronic picture with better clarity. This not only solves the problem of identifying invisible codes on the surface of reflective objects, but the device can also be used for invisible code recognition on the surface of low-reflective materials.

[0030] Based on the above scheme, the shading baffle adopts a white frosted opaque plastic plate to ensure that the shading baffle is not penetrated by infrared rays. The infrared camera uses the characteristic that highly reflective and white heat-free object surfaces appear white, and the umbra of the camera on the surface of the reflective packaging material with a diameter of about 12mm is reduced to an umbra with a diameter of 2-3mm, which greatly reduces the umbra of the camera and avoids the problem of excessive distortion of the image captured by the camera due to excessive lens observation angle.

[0031] Based on the above solution, the bottom of the identification device is cut at an angle by using the principle of light refraction, so that the conical camera and the surface of the identification material are slightly tilted at a certain angle to avoid the minimum angle of the lens umbra. The general experience value is about 8-10°, which can avoid the umbra of the camera and obtain a clear electronic image of the invisible code sprayed on the surface of the reflective material, and also avoid too much distortion of the captured image content caused by too large an angle. Therefore, the content of the invisible code can be analyzed through dedicated software, and the cloud platform can be accessed to obtain the product information associated with the invisible code.

[0032] Based on the above solution, the combined plate adopts a PET diffusion film and a diffusion plate with a thickness of 1-2 mm, and the PET diffusion film is pasted on the diffusion plate.

[0033] The PET diffusion film may be a film material of about 0.075 mm.

[0034] Based on the above scheme, the PET diffusion film of the first layer of composite board faces upward, and the distance to the infrared LED lamp beads is not less than 5mm. The second layer of composite board is installed in the same direction as the first layer of composite board, and the spacing between the two layers of composite boards is not less than 10mm.

[0035] 5mm。 Based on the above scheme, the lens shading baffle thickness is 1-2mm, the diameter of the opening is the cone lens size increased by 0. 5mm.

[0036] Based on the above solution, the electronic image processing module has a USB interface, which is connected to a mobile phone or computer via an OTG data cable.

[0037] The resolution of the electronic identification module is preferably not less than 500,000 pixels, such as 50, 100, 150, 200, 250, 300, etc., and preferably about 1 million pixels.

[0038] Based on the above scheme, a slope with the same angle as the minimum angle to avoid the lens umbra is cut at the bottom of the recognition device, and starting from 2 / 3 of the width, another 4-5° angle is cut to cope with the invisible code recognition on uneven or arc surfaces.

[0039] On the basis of the above scheme, the reflective packaging materials mainly include gold and silver cardboard, aluminum foil, silver paper, vacuum aluminum-plated film, laser film or laser paper, etc.

[0040] The present invention also provides an application method of the infrared invisible code recognition device on the surface of the reflective packaging material according to the above-mentioned device, wherein the infrared invisible code recognition device is connected to a mobile phone or a computer via a built-in USB data cable 8, a dedicated recognition software is downloaded to recognize the invisible code, and a cloud data platform is accessed to obtain relevant information associated with the relevant invisible code, and then the information associated with the invisible code is displayed on the access terminal.

[0041] Compared with the existing identification equipment, the present invention is superior in that it effectively solves the reflection problem of the lens umbra and the point light source on the surface of the reflective packaging material, realizes the electronic identification image of the special invisible code through a relatively simple structure, thereby reducing the cost of the equipment.

[0042] The identification device of the present invention adopts a driver-free design, and is extremely convenient to connect to a computer and a mobile phone, thereby facilitating the use and promotion of the device.

[0043] The identification device of the present invention is easy to carry and maintain, and is conducive to the application and promotion of special invisible codes. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic diagram of the structure of the present invention;

[0045] Figure 2 A schematic cross-sectional view of a combined plate 51;

[0046] Figure 3 Schematic diagram of the conical lens and light shielding baffle structure;

[0047] Figure 4 This is a schematic diagram of the installation position of the combined board of Example 1;

[0048] Figure 5 This is a schematic diagram of the structure of the present invention in Example 2;

[0049] Figure 6 Schematic diagram for identifying curved reflective packaging materials;

[0050] Description of the numbers in the figure:

[0051] 1 – housing;

[0052] 2——Electronic image processing module;

[0053] 3 – electronic camera;

[0054] 4——Infrared LED lamp beads

[0055] 5——diffusion composite plate; 51, 52——combination plates one and two;

[0056] 6——shading baffle; 61——opening;

[0057] 7——Reflective packaging material; 71——Umbra of the lens; 72——Observable range;

[0058] 7' - curved reflective packaging material;

[0059] 8——USB data cable;

[0060] 9——Mobile phone or computer terminal;

[0061] 10——Cloud data platform. DETAILED DESCRIPTION

[0062] Example 1

[0063] like Figures 1 to 4The device for identifying infrared invisible codes on the surface of reflective packaging materials, wherein the target identification plane is the surface of the reflective packaging material 7, comprises a cylindrical housing 1, an electronic image processing module 2 including an electronic identification module installed on the housing 1, and an electronic camera 3, such as Figure 1 As shown, the housing 1 is provided with an electronic image processing module 2, an electronic camera 3, an 850nm infrared LED lamp bead 4, a diffusion combination plate 5 and a shading baffle 6 in order from top to bottom, wherein the electronic image processing module 2 is installed on the top of the housing 1, and more than two 850nm or 900nm infrared LED lamp beads are evenly distributed around the electronic camera 3 below the electronic image processing module 2, and a two-layer combination plate 5 consisting of a diffusion film and a diffusion plate is arranged below the infrared LED lamp bead 4, a combination plate 1 51 is close to the infrared LED lamp bead 4, and a combination plate 2 52 is above the shading baffle 6 with an opening 61, and infrared light is evenly emitted to the reflective surface of the reflective packaging material 7 through the two-layer combination plate;

[0064] The electronic camera 3 adopts a conical lens, which faces the opening 61 of the shading baffle 6. The installation angle α of the conical lens is the minimum angle to avoid the lens umbra 71, and the observable range on the highly reflective surface of the reflective packaging material 7 is 15*10mm.

[0065] like Figure 1 As shown in or 3, the shading baffle 6 is made of a white frosted opaque plastic sheet, and uses an infrared camera to present a white characteristic to the highly reflective and white heat-free object surface, and reduces the umbra of the camera on the surface of the reflective packaging material with a diameter of about 12mm to a umbra of about 2-3mm in diameter.

[0066] In this embodiment, the installation angle α of the conical camera is 8-10°.

[0067] In this embodiment, the first and second composite panels 51 and 52 have the same layered structure, such as Figure 2 , which is a cross-sectional schematic diagram of a combined plate 51 , wherein the combined plate 51 comprises a PET diffusion film 511 and a diffusion plate 512 with a thickness of 1-2 mm. The PET diffusion film 511 is adhered to the diffusion plate 512 via an adhesive layer 513 .

[0068] like Figure 1 and 4 As shown, the PET diffusion film 511 of the combination board 1 51 faces upward, and the distance to the infrared LED lamp bead 4 is not less than 5mm. The combination board 2 52 is installed in the same direction as the combination board 1 51, and the distance between the combination boards 1 and 2 is not less than 10mm.

[0069] like Figure 1 As shown in Figure 3, the thickness of the light shielding baffle 6 is 1-2 mm, and the aperture of the opening is the size of the conical lens increased by 0.5 mm.

[0070] The electronic image processing module 2 has a USB interface, which is connected to a mobile terminal such as a computer or a mobile phone via a USB data cable 8 .

[0071] In this embodiment, the resolution of the electronic identification module is about 1 million pixels.

[0072] The working logic principle of each module in this embodiment is as follows:

[0073] pass Figure 1 The structure is used to calculate the angle of the lens's umbra on the surface of the reflective packaging material, and the cutting angle at the bottom of the device is adjusted so that the conical lens avoids its own umbra within the visible range of the reflective packaging material surface. Figure 2 Improve the diffusion film or diffusion plate to form a diffusion combination plate of PET diffusion film and diffusion plate, and Figure 3 Make a lens shading baffle; the installation position of the diffusion combination plate, such as Figure 4 shown.

[0074] Then cut a bevel of the same angle at the bottom of the identification device, such as Figure 5 , among which Figure 5 In addition to cutting out a minimum angle to avoid the lens umbra, the bottom of the recognition device will also cut out an angle of about 4° starting from 2 / 3 of the width to cope with invisible code recognition on uneven or arc surfaces;

[0075] Place the device on the surface of reflective packaging materials, connect the device's USB cable to a computer or mobile phone, and use dedicated software to display the image information observed by the device in real time. When the software recognizes that an infrared invisible code appears in the image, the system will automatically identify the content of the invisible code and access the invisible code cloud server to obtain the associated data information of the invisible code.

[0076] The present invention realizes the electronic recognition image of the special invisible code through a relatively simple structure, thereby reducing the cost of the device. The driver-free design is adopted, and it is extremely convenient to connect the computer and the mobile phone, which is convenient for the use and promotion of the present invention. The recognition device has a simple structure, is easy to carry and maintain, and is conducive to the application and promotion of the special invisible code.

[0077] Example 2

[0078] like Figure 5 As shown, other structures are the same as those in Example 1, except that the bottom of the housing is structurally improved to cope with the invisible code recognition situation on uneven or arc surfaces.

[0079] A device for identifying infrared invisible codes on the surface of reflective packaging materials, wherein the target identification plane is the reflective surface of the reflective packaging material 7, comprises a cylindrical housing 1, an electronic image processing module 2 including an electronic identification module installed on the housing 1, and an electronic camera 3, such as Figure 5 As shown, the housing 1 is provided with an electronic image processing module 2, an electronic camera 3, an 850nm or 900nm infrared LED lamp bead 4, a diffusion combination plate 5 and a shading baffle 6 in order from top to bottom, wherein the electronic image processing module 2 is installed on the top of the housing 1, and more than two 850nm infrared LED lamp beads are evenly distributed around the electronic camera 3 below the electronic image processing module 2, and a two-layer combination plate 5 consisting of a diffusion film and a diffusion plate is arranged below the infrared LED lamp bead 4, a combination plate 1 51 is close to the infrared LED lamp bead 4, and a combination plate 2 52 is above the shading baffle 6 with an opening 61, and the infrared light is evenly emitted to the reflective surface of the reflective packaging material 7 through the two-layer diffusion combination plate;

[0080] The electronic camera 3 adopts a conical lens, which faces the opening 61 of the shading baffle 6. The installation angle α of the conical lens is the minimum angle to avoid the lens umbra 71, and the observable range on the reflective surface of the reflective packaging material 7 is about 15*10mm.

[0081] A slope with the same angle as the minimum angle to avoid the lens umbra is cut on the bottom shell of the recognition device. The empirical value is generally 8-10°, and starting from 2 / 3 of the width, another slope of 4-5° is cut upward. On the surface of the curved reflective packaging material 7', the recognition device can be rotated from the first cut surface to the second cut surface. The operation is as follows: Figure 6 As indicated by the arrow in the image window, the invisible code on the surface of the reflective material will be displayed in real time in the image window of the software during the rotation of the recognition device. When a relatively clear invisible code pattern appears, the rotation of the recognition device can be stopped. At this time, the recognition software can generally recognize the invisible code, and this time is less than 1 second.

[0082] like Figure 6 , connect the invisible code recognition device to the mobile phone or computer terminal 9 through the built-in USB data cable 8, download the dedicated recognition software, the software will automatically parse and recognize the invisible code, and access the cloud data platform 10 to obtain the relevant information associated with the relevant invisible code, and then display the information associated with the invisible code on the access terminal, according to the following steps:

[0083] Connect the device to a computer or mobile phone via its own USB;

[0084] Download and install a special program to recognize invisible codes on your computer or mobile phone;

[0085] Open the recognition software and connect the device of the present invention. After the software prompts that the device has been successfully connected, place the invisible code recognition device of the present invention on the surface of the object to be recognized, move the invisible code recognition device, and observe the image on the software monitoring interface to see if the image of the invisible code appears;

[0086] When an invisible code image appears in the software interface, the software will automatically identify the invisible code content that corresponds to the invisible code pattern, and automatically access the cloud data platform to query and display the relevant product information previously associated with the invisible code.

Claims

1. A device for identifying invisible codes on the surface of reflective packaging materials, wherein the target identification plane is the surface of the reflective packaging material, comprising a housing, an electronic image processing module including an electronic identification module mounted on the housing, and an electronic camera, characterized in that: An 850nm or 900nm infrared LED lamp bead is arranged on the electronic image processing module, and two layers of combined boards consisting of a diffusion film and a diffusion plate are arranged in front of the infrared LED lamp bead, one layer is close to the lamp bead, and the other layer is above the lens shading baffle with an opening, and the infrared light is evenly emitted to the surface of the reflective packaging material through the two layers of combined boards; The electronic camera adopts a conical lens, which is directly opposite to the opening of the light shielding baffle. The installation angle of the lens is the minimum angle to avoid the lens umbra, and the observable range on the surface of the reflective packaging material is 15*10mm; wherein, The shading baffle is made of a white frosted opaque plastic sheet, and uses an infrared camera to present a white feature to the highly reflective and white heat-free object surface, and reduces the umbra of the camera on the surface of the reflective packaging material with a diameter of about 12mm to a umbra of about 2-3mm in diameter; The conical lens cuts a hypotenuse with an angle of 8 to 10 degrees at the bottom of the recognition device, so that the angle between the camera and the recognition surface is between 8 and 10 degrees, avoiding the umbra of the lens opening on the reflective surface; A chamfer with the same angle as the minimum angle for avoiding the lens umbra is cut on the bottom shell of the identification device, and starting at 2 / 3 of the width, another chamfer of 4-5° is cut.

2. The invisible code recognition device on the surface of reflective packaging material according to claim 1, characterized in that: The combined plate adopts a PET diffusion film and a diffusion plate with a thickness of 1-2 mm, and the PET diffusion film is pasted on the diffusion plate.

3. The invisible code recognition device on the surface of reflective packaging material according to claim 2, characterized in that: The thickness of the PET diffusion film is 0.075 mm.

4. The invisible code recognition device for the surface of reflective packaging material according to claim 1 or 2, characterized in that: The PET diffusion film of the first layer of composite board faces upwards, and the distance to the infrared lamp beads is not less than 5mm. The second layer of composite board is installed in the same direction as the first layer of composite board, and the distance between the two layers of composite boards is not less than 10mm.

5. The invisible code recognition device on the surface of reflective packaging material according to claim 1, characterized in that: 5mm。 The thickness of the shading baffle is 1-2mm, the aperture of the opening is the cone lens size increased by 0. 5mm.

6. The invisible code recognition device on the surface of reflective packaging material according to claim 1, characterized in that: In the electronic image processing module, there is a USB interface.

7. The invisible code recognition device for the surface of reflective packaging material according to claim 1 or 6, characterized in that: The resolution of the selected electronic identification module shall not be less than 500,000 pixels.

8. The invisible code recognition device on the surface of reflective packaging material according to claim 1, characterized in that: Reflective packaging materials include gold and silver cardboard, aluminum foil, silver paper, vacuum aluminized film, laser film or laser paper.

9. An application method of the invisible code recognition device on the surface of reflective packaging materials according to any one of claims 1 to 8, wherein the invisible code recognition device is connected to a mobile phone or a computer via a built-in USB data cable, a dedicated recognition software is downloaded to recognize the invisible code, and a cloud data platform is accessed to obtain relevant information associated with the relevant invisible code, and then the information associated with the invisible code is displayed on the access terminal.

10. According to the application method of the invisible code recognition device on the surface of reflective packaging materials as described in claim 9, on the surface of the reflective packaging material with a curved surface, the second cut angle is selected at the bottom of the device, that is, starting from 2 / 3 of the width, and then cutting an upward cut angle of 4 to 5 degrees, and the recognition device is rotated from the first cut surface to the second cut surface. During the rotation of the recognition device, the invisible code on the surface of the reflective packaging material will be displayed in real time in the software image window. After a relatively clear invisible code pattern appears, the rotation of the recognition device is stopped, and the recognition software recognizes the invisible code.

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