Preparation method of active light-emitting traffic sign board with honeycomb fonts formed through laser cutting

Abstract

The invention discloses a preparation method of an active light-emitting traffic sign with honeycomb fonts formed through laser cutting, and relates to the technical field of road traffic signs. Comprising the steps of 1, determining signboard parameters; step 2, arranging honeycomb holes of the signboard; 3, laser cutting is conducted according to the optimal pore layout model; step 4, polishing and cleaning the layout; step 5, pasting a bottom color reflective film and a white character film reflective film; 6, the light-emitting lamp strip is installed; step 7, installing a control box and a power supply; step 8, packaging the bottom plate; and 9, testing and using. The laser cutting technology is used for creating honeycomb structure fonts, honeycomb hole structures are accurately regulated and controlled, the signboard is light and high in strength, durability is improved, and the service life is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of road traffic signs, and in particular to a method for preparing an active luminous traffic sign with honeycomb fonts formed by laser cutting. Background Art

[0002] Road traffic signs are graphic symbols that display traffic regulations and road information. They can express traffic regulations in an image, concrete and concise manner. They also have graphics and warning colors that are recognizable to the public, which are used to remind pedestrians, motor vehicles and non-motor vehicles of traffic management, and ensure the smooth flow of roads and driving safety. Traffic signs are mainly divided into two types: passive luminous signs and active luminous signs. Passive luminous signs use the retro-reflective luminous materials on the surface of the signs to reflect vehicle lights and present a luminous effect; active luminous signs are equipped with semiconductor light-emitting devices such as LEDs and LCDs, and are controlled by electronic systems to emit light under the action of external power. However, passive luminous signs must rely on light to produce reflections at night to guide vehicles to drive correctly. In the absence of lighting or bad weather conditions, vehicles often go the wrong way because they cannot see the information on the traffic signs clearly, and even cause traffic accidents in serious cases; while active luminous signs do not need to rely on lights to enable traffic signs to play an instructive role for pedestrians and vehicles both during the day and at night, and their application is becoming more and more extensive.

[0003] The most critical parameter of a signboard is its ability to resist wind loads. The factors that affect the wind load resistance of a signboard are mainly its weight and surface area. The surface area of ​​a signboard is determined according to the actual deployment scenario and cannot be changed at will. Therefore, in the production of signboards, we try to reduce the weight of the signboard as much as possible to enhance its ability to resist wind loads and increase its reliability.

[0004] In order to reduce the overall weight of road traffic signs, one of the existing active luminous signs is to use a transparent synthetic resin plate as the sign panel, a metal base plate with the same size as the sign panel and a frame as the back cover, an engineering-grade or high-strength reflective film with engraved patterns and texts is pasted on the surface of the sign panel, and a light-emitting unit is placed between the sign panel and the back cover to form a shape. However, the existing active luminous signs have some disadvantages: First, the weather resistance is poor: the transparent synthetic resin plate is used as the sign panel. Although it is lighter than the aluminum plate, it is easily corroded by ultraviolet rays, oxidation, acid and alkali factors in the outdoor environment for a long time, resulting in decreased transparency, yellowing and brittleness of the surface, affecting the visibility and service life of the traffic sign. Second, the impact resistance is weak: under high wind resistance or severe weather conditions, the transparent synthetic resin plate has poor torsion resistance and is easy to break or deform, causing damage or failure of the traffic sign. Third, the manufacturing process is complicated: a light-transmitting area is cut out on the light-shielding reflective film, and the cut light-shielding reflective film is pasted on a transparent synthetic resin plate, a blue base color reflective film is pasted on the uncut area of ​​the light-shielding reflective film, and a white letter film uses a light-transmitting reflective film and is pasted on the cut area of ​​the light-shielding reflective film. The steps are cumbersome, time-consuming and labor-intensive. The other method is to use a thin aluminum plate as the sign panel, and a laser cutting machine is needed to engrave the characters on the aluminum plate for light transmission. The wind load resistance of the aluminum plate is better than that of the transparent synthetic resin plate, but it is heavier than the luminous sign made of the transparent synthetic resin plate as the sign base plate. However, compared with the production method of the transparent synthetic resin plate as the sign panel, although it does not need to paste the shading reflective film, the process is relatively simplified, but when the traditional laser cutting technology is used to implement character engraving on the aluminum plate, it occasionally encounters part of the character outline due to uneven laser energy distribution or material characteristics. Incomplete cutting, resulting in material loss. In order to ensure the integrity and aesthetics of the characters, the defects caused by laser cutting need to be repaired manually later to restore the original intention of the character design, resulting in a waste of human resources.

[0005] Metal honeycomb panels adopt a unique honeycomb structure design, which can effectively disperse and withstand external forces, thus making them very strong. At the same time, due to its internal hollow structure, metal honeycomb panels are lighter than solid metal panels and are easy to carry and install.

[0006] The inventors found that using laser cutting technology to create honeycomb structure fonts instead of directly engraving on honeycomb plates can ensure the integrity and light transmittance of the character outlines while avoiding cutting defects caused by uneven laser energy distribution or material properties. Summary of the invention

[0007] The present invention aims to propose a method for preparing an active luminous traffic sign with a laser-cut honeycomb font, which adopts laser cutting technology to realize the forming of the honeycomb font structure. In this way, the traditional direct engraving process is replaced, the integrity and light transmittance of the font structure are ensured, and the problems of leakage and missing blocks that may occur during the laser cutting process are effectively solved. The present invention also allows the structure and spacing of the honeycomb holes to be precisely controlled, so as to prepare a sign that is both lightweight and high-strength, significantly improving its durability and service life. In addition, this technology can adapt to various traffic sign contents, including Chinese characters, English, pinyin, characters, etc., which can all be produced using high-density honeycomb hole cutting technology, thereby meeting the production requirements of high-standard traffic signs.

[0008] To achieve the above objectives, this application provides the following solutions: Step 1. Determine the signboard parameters; determine key parameters such as the signboard panel area, signboard panel thickness, signboard pre-installation height, wind load bearing capacity, signboard panel material, etc.

[0009] Step 2. Layout of honeycomb holes for signboard.

[0010] 2.1 Characteristic unit cluster design; The characteristic unit clusters include main honeycomb units, rib honeycomb units and connecting units; Assume that the area of ​​one of the characteristic unit clusters is S0, S0=S1+S2+S3, wherein S1 is the area of ​​the main honeycomb unit in each of the characteristic unit clusters, S2 is the area of ​​the rib honeycomb unit in each of the characteristic unit clusters, and S3 is the area of ​​the connecting unit in each of the characteristic unit clusters; The main honeycomb unit includes n1 first honeycomb holes, each of which has an area of ​​A1, and the pore density of the main honeycomb unit is D1=n1*A1 / S1; the rib honeycomb unit includes n2 second honeycomb holes, each of which has an area of ​​A2, and the pore density of the rib honeycomb unit is D2=n2*A2 / S2; the connecting unit includes n3 third honeycomb holes, each of which has an area of ​​A3, and the pore density of the connecting unit is D3=n3*A3 / S3; the pore density of one characteristic unit cluster is: D0=(n1*A1+n2*A2+n3*A3) / S0.

[0011] 2.2 Feature unit cluster layout; The characteristic unit cluster is laid out according to the load margin Q, the luminous area weight I, and the density weight T, and the layout satisfies the relationship , where K is the bulk modulus, G is the shear modulus, and v is the Poisson’s ratio of the material; The load margin is set by the format area of ​​the prefabricated signboard panel and the pre-installation height of the signboard to adjust the load margin of the signboard affected by wind force; the luminous area weight ensures the maximum light transmittance under the condition of satisfying the load margin. The density weight T is to ensure that the weight of the sign panel is reduced to the maximum extent possible while satisfying the load margin. ; Wherein, η is the weight fitting coefficient, 0<η<1, i=1, 2......n.

[0012] 2.3 Overall layout of honeycomb holes on signboards; After the first layout of the characteristic unit cluster is completed, it is detected that there are no main honeycomb units and rib honeycomb units in an area larger than the width of one of the connecting units. If the existence of the rib honeycomb units is detected in at least two directions of this area, the area is filled with the rib honeycomb units, otherwise no filling is performed.

[0013] 2.4 The overall strength of the honeycomb holes of the signboard is evenly treated; After filling, the intensity is uniformly fitted to the function Perform optimal variable fitting, wherein the variable factor xi (i=1,2,...n) can be any variable that affects the signboard, and the variable factor xi can include but is not limited to the pore density D0 of a characteristic unit cluster, and the pore density D1 of the main honeycomb unit after filling, the pore density D2 of the rib honeycomb unit, the pore density D3 of the connecting unit, etc.; according to the probability formula , the z value obtained when p takes the maximum value is the optimal weight combination, a is a constant, and ai are the weight coefficients of the corresponding variable factors xi.

[0014] 2.5 Overall optimization of the honeycomb holes of the signboard and establishment of the optimal pore layout model; Through multiple iterations and experiments of finite element analysis simulation, the best combination of the aperture, pore density and honeycomb hole spacing of the first honeycomb hole, the second honeycomb hole and the third honeycomb hole is found, and the light and dark contrast between the luminous area and the non-luminous area of ​​the sign is achieved through the layout of the honeycomb holes, and the optimal pore layout model is established through the modified trial and error method. Among them, the distance between two adjacent first honeycomb holes is less than the width thickness of the sign panel.

[0015] 2.6 Repeat the above steps to obtain the corresponding optimal pore layout models for different types of substrates to form a pore layout model library.

[0016] Step 3. Perform laser cutting according to the optimal pore layout model.

[0017] Step 4. Grind and clean the plate surface; After engraving is completed, the edges of the holes may need to be polished and cleaned to remove any molten aluminum and dust to ensure uniform light transmission. The surface of the plate also needs to be polished and cleaned so that the reflective film can be pasted more firmly later.

[0018] Step 5. Paste the base color reflective film and the white letter film reflective film; paste the prepared base color reflective film onto the panel, and then paste the white light-transmitting reflective film into the letter film and paste it on the main honeycomb unit position.

[0019] Step 6. Installation of the light strip: Install the light strip on the other side of the main honeycomb unit of the aluminum plate, ensuring that the position and fixing method of the light strip will not affect the light transmittance and structural stability of the honeycomb structure.

[0020] Step 7. Install the control box and power supply. The active luminous sign needs to be equipped with a control box and batteries. Fix the control box and batteries on the inner side of the sign bottom plate.

[0021] Step 8. Baseboard packaging: The active luminous sign that has completed the above process needs to be packaged on the baseboard to ensure that the internal electronic components are not affected by external weather conditions during subsequent use.

[0022] Step 9. Test and use: The prepared active luminous signboard undergoes final testing and adjustments.

[0023] Beneficial effects of the technical solution of this application: In the present invention, the honeycomb structure is cleverly used to form the fonts on the traffic sign using laser cutting technology. This design not only improves the durability and service life of the sign, but also makes it have higher strength while maintaining its lightness.

[0024] By using metal substrates and optimizing the manufacturing process of honeycomb hole layout, the luminous signboard has the characteristics of strong metal weather resistance and strong wind load resistance, while also having the lightweight characteristics of transparent synthetic resin materials. It also avoids the problems of reduced transparency, yellowing and brittleness of the surface caused by ultraviolet rays, oxidation, acid and alkali corrosion when using transparent synthetic resin boards, thereby extending the service life of the luminous signboard.

[0025] Through the design and optimized layout of characteristic unit clusters, the impact resistance is improved, and the stability and integrity of the structure can be maintained even under high wind resistance or severe weather conditions, reducing the risk of damage and failure of the sign.

[0026] The optimal pore layout model was established to achieve lightweight signboards. The light and dark contrast between the luminous area and the non-luminous area of ​​the signboard was achieved through the layout of honeycomb holes. There was no need to paste a light-shielding base film, which reduced material costs and improved the environmental protection and economy of the signboard. The optimal pore layout model library for different types of substrates improved production efficiency, adapted to different market demands, and enhanced product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 An overall flow chart of a method for preparing an active luminous traffic sign with a honeycomb font formed by laser cutting provided in this application; Figure 2 A flowchart of step 2 of a method for preparing an active luminous traffic sign with a honeycomb font formed by laser cutting provided in this application; Figure 3 A schematic diagram of the characteristic unit cluster layout of a method for preparing an active luminous traffic sign with a laser-cut honeycomb font provided in this application; Figure 4 A method for preparing an active luminous traffic sign with a honeycomb font formed by laser cutting provided in this application; a schematic diagram of the overall pore layout of the sign panel; Figure 5 A method for preparing an active luminous traffic sign with a honeycomb font formed by laser cutting provided in this application; a rendering of the sign panel after laser cutting; Figure 6 A method for preparing an active luminous traffic sign with a honeycomb font formed by laser cutting is provided in this application, and an overall effect diagram of the active luminous sign.

[0029] Description of the numbers in the figure: 1. Characteristic unit cluster; 2. Main honeycomb unit; 3. Rib honeycomb unit; 4. Connecting unit; 5. First honeycomb hole; 6. Second honeycomb hole; 7. Third honeycomb hole. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] In an optional embodiment, in combination with Figure 1 , Figure 2 As shown, a method for preparing an active luminous traffic sign with a honeycomb font formed by laser cutting according to an embodiment of the present application comprises: Step 1. Determine the signboard parameters; determine key parameters such as the signboard panel area, signboard panel thickness, signboard pre-installation height, wind load bearing capacity, signboard panel material, etc.

[0033] Step 2. Layout of honeycomb holes for signboard.

[0034] 2.1 Characteristic unit cluster 1 design; The characteristic unit cluster 1 includes a main honeycomb unit 2, a rib honeycomb unit 3 and a connecting unit 4; Assume that the area of ​​a characteristic unit cluster 1 is S0, S0=S1+S2+S3, where S1 is the area of ​​the main honeycomb unit 2 in each characteristic unit cluster 1, S2 is the area of ​​the rib honeycomb unit 3 in each characteristic unit cluster 1, and S3 is the area of ​​the connecting unit 4 in each characteristic unit cluster 1; The main honeycomb unit 2 includes n1 first honeycomb holes 5, each of which has an area of ​​A1, and the pore density of the main honeycomb unit 2 is D1=n1*A1 / S1; the rib honeycomb unit 3 includes n2 second honeycomb holes 6, each of which has an area of ​​A2, and the pore density of the rib honeycomb unit 3 is D2=n2*A2 / S2; the connecting unit 4 includes n3 third honeycomb holes 7, each of which has an area of ​​A3, and the pore density of the connecting unit 4 is D3=n3*A3 / S3; the pore density of a characteristic unit cluster 1 is: D0=(n1*A1+n2*A2+n3*A3) / S0.

[0035] Common honeycomb cell shapes include regular hexagons, squares, and circles. Regular hexagonal honeycomb structures usually have higher strength and stiffness because their geometric shape can effectively disperse stress. The geometric shape of the honeycomb structure: The geometric shape of the honeycomb structure also affects the structural stability. Hexagonal honeycomb structures usually have higher strength and stiffness than square structures. An embodiment provided in this application is a hexagonal honeycomb cell, such as Figure 3 As shown. The density D of the honeycomb holes can be defined as the number of holes per square unit area. Assuming r is the radius of the circumscribed circle of the hexagonal honeycomb unit, according to the area of ​​the hexagonal honeycomb holes The area A1 of the first honeycomb hole 5 , the area A2 of the second honeycomb hole 6 , and the area A3 of the third honeycomb hole 7 can be calculated.

[0036] 2.2 Feature unit cluster 1 layout; The characteristic unit cluster 1 is laid out according to the load margin Q, the luminous area weight I, and the density weight T. The layout satisfies the relationship , where K is the bulk modulus, G is the shear modulus, and v is the Poisson’s ratio of the material; The load margin is set by the prefabricated sign panel area and the pre-installed height of the sign to adjust the load margin of the sign affected by wind; the luminous area weight ensures the maximum light transmittance under the condition of meeting the load margin. ; The density weight T is to ensure that the weight of the sign panel is reduced to the maximum extent possible while satisfying the load margin. ; Wherein, η is the weight fitting coefficient, 0<η<1, i=1, 2......n.

[0037] 2.3 Overall layout of honeycomb holes on signboards; After the first layout of the characteristic unit cluster 1 is completed, it is detected that there is no main honeycomb unit 2 and rib honeycomb unit 3 in the area larger than the width of a connecting unit 4. If the existence of rib honeycomb units 3 is detected in at least two directions of this area, the area is filled with rib honeycomb units 3, otherwise no filling is performed; 2.4 The overall strength of the honeycomb holes of the signboard is evenly treated; After filling, the intensity is uniformly fitted to the function The best variable fitting is performed, wherein the variable factor xi (i=1,2,...n) can be any variable that affects the signboard, and the variable factor xi can include but is not limited to the pore density D0 of a characteristic unit cluster 1, the pore density D1 of the main honeycomb unit 2 after filling, the pore density D2 of the rib honeycomb unit 3, the pore density D3 of the connecting unit 4, etc.; according to the probability formula , the z value obtained when p takes the maximum value is the optimal weight combination, a is a constant, and ai are the weight coefficients of the corresponding variable factors xi.

[0038] The selection of weight coefficient is very important. It is necessary to maximize the pore density D1 of the main honeycomb unit 2 to ensure sufficient light transmittance. The pore density D2 of the rib honeycomb unit 3 and the pore density D3 of the connecting unit 4 should be set to ensure light weight and less light leakage. The pore density D0 of a characteristic unit cluster 1 needs to ensure the maximum wind load strength and overall light weight of the signboard panel. 2.5 Overall optimization of the honeycomb holes of the signboard and establishment of the optimal pore layout model; Through multiple iterations and experiments of finite element analysis simulation, the best combination of the aperture size, pore density and honeycomb hole spacing of the first honeycomb hole 5, the second honeycomb hole 6 and the third honeycomb hole 7 is found. The light and dark contrast between the luminous area and the non-luminous area of ​​the signboard is achieved through the layout of the honeycomb holes, and the optimal pore layout model is established through the modified trial and error method.

[0039] Design of the first honeycomb hole 5: The design of the honeycomb hole needs to take into account the outline of the font and the connection of the strokes to ensure the formation of clear and recognizable text. The distance between two adjacent first honeycomb holes 5 is less than the thickness of the signboard panel. The shape, size, density and other parameters of the honeycomb hole need to be reasonably designed to ensure good light transmission and maintain the overall stability of the text. The aperture size of the honeycomb hole should be small enough to ensure that the outline of the formed text is clear and sufficient light transmission can be guaranteed. Too large an aperture may cause unclear text, and too small an aperture may affect the light transmission effect. The distance between the holes also needs to be reasonably designed to ensure the structural stability and uniformity of light transmission of the text. Too small an aperture may cause unstable text, and too large an aperture may cause uneven light transmission. The density of the honeycomb hole affects the overall light transmission effect and the clarity of the text. Too low a density may result in insufficient light transmission, and too high a density may cause the text to be too dense, affecting readability.

[0040] The design of the second honeycomb hole 6 mainly considers that the light transmission should be as small as possible, forming a strong contrast between light and dark with the main honeycomb unit 2. And the lightness is maximized while ensuring the strength.

[0041] Design of the third honeycomb hole 7: The third honeycomb hole 7 can be arranged in some special way to make the hole distribution more random or sparse, which is in contrast to the regular arrangement inside. For example, some randomness can be introduced to make the hole arrangement at the edge more disordered to achieve a smooth transition effect.

[0042] Safety Factor: When designing, a safety factor is usually considered to ensure that the structure is still stable under extreme conditions. This may mean choosing a smaller pore size or a higher density to provide additional structural strength.

[0043] In addition, to ensure structural stability, the design needs to balance the pore size, density and material thickness. Usually, by making samples and performing structural tests, it can be determined which combination of pore size and density provides the best structural stability under given load conditions. Experimental tests, such as mechanical property tests and light transmittance tests, are also important means to determine the best design parameters in the trial and error process of establishing the optimal pore layout model.

[0044] 2.6 Repeat the above steps to obtain the corresponding optimal pore layout models for different types of substrates to form a pore layout model library.

[0045] Step 3. Perform laser cutting according to the optimal pore layout model.

[0046] Step 4. Grind and clean the plate surface; After engraving is completed, the edges of the holes may need to be polished and cleaned to remove any molten aluminum and dust to ensure uniform light transmission. The surface of the plate also needs to be polished and cleaned so that the reflective film can be pasted more firmly later.

[0047] Step 5. Paste the base color reflective film and the white letter film reflective film; paste the prepared base color reflective film onto the panel, and then paste the white light-transmitting reflective film into the letter film and paste it at the main honeycomb unit 2 position.

[0048] Step 6. Installation of the light strip: Install the light strip on the other side of the main honeycomb unit 2 of the aluminum plate, ensuring that the position and fixing method of the light strip will not affect the light transmittance and structural stability of the honeycomb structure.

[0049] Step 7. Install the control box and power supply. The active luminous sign needs to be equipped with a control box and batteries. Fix the control box and batteries on the inner side of the sign bottom plate.

[0050] Step 8. Baseboard packaging: The active luminous sign that has completed the above process needs to be packaged on the baseboard to ensure that the internal electronic components are not affected by external weather conditions during subsequent use.

[0051] Step 9. Test and use: The prepared active luminous signboard undergoes final testing and adjustments.

[0052] It is worth noting that if Figure 1 to Figure 5 As shown, this embodiment only shows one implementation method of a method for preparing an active luminous traffic sign with a honeycomb font formed by laser cutting, but it does not mean that the method for preparing an active luminous traffic sign with a honeycomb font formed by laser cutting provided in this application has only this one implementation method; the specific settings can be designed according to the needs of actual applications.

[0053] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "inside", "outside", "surface", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The term "multiple" means two or more, unless otherwise clearly and specifically defined.

[0054] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0055] The embodiments described above are only descriptions of the preferred methods of the present application, and are not intended to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements made to the technical solutions of the present application by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present application.

Claims

1. A method for preparing an active luminous traffic sign with honeycomb fonts cut by laser, It is characterized in that include: Step 1. Determine the signboard parameters; Step 2. Layout of honeycomb holes of signboard; Step 3. Perform laser cutting according to the optimal pore layout model; Step 4. Polishing and cleaning of the plate; Step 5. Paste the base color reflective film and the white letter film reflective film; Step 6. Installation of the light strip; Step 7. Install the control box and power supply; Step 8. Baseboard packaging; Step 9. Test the use.

2. According to the method for preparing a laser-cut honeycomb font active luminous traffic sign according to claim 1, It is characterized in that Step 2 includes, 2.1 Characteristic unit cluster design; 2.2 Feature unit cluster layout; 2.3 Overall layout of honeycomb holes on signboards; 2.4 The overall strength of the honeycomb holes of the signboard is evenly treated; 2.5 Overall optimization of the honeycomb holes of the signboard and establishment of the optimal pore layout model; 2.6 Repeat the above steps to obtain the corresponding optimal pore layout model for different types of substrates, forming a parameter-pore layout model library.

3. The method for preparing a laser-cut honeycomb-shaped active luminous traffic sign according to claim 2, It is characterized in that Step 2.1 includes, The characteristic unit cluster includes a main honeycomb unit, a rib honeycomb unit and a connecting unit; Assume that the area of ​​one of the characteristic unit clusters is S0, S0=S1+S2+S3, wherein S1 is the area of ​​the main honeycomb unit in each of the characteristic unit clusters, S2 is the area of ​​the rib honeycomb unit in each of the characteristic unit clusters, and S3 is the area of ​​the connecting unit in each of the characteristic unit clusters; The main honeycomb unit includes n1 first honeycomb holes, each of which has an area of ​​A1, and the pore density of the main honeycomb unit is D1=n1*A1 / S1; the rib honeycomb unit includes n2 second honeycomb holes, each of which has an area of ​​A2, and the pore density of the rib honeycomb unit is D2=n2*A2 / S2; the connecting unit includes n3 third honeycomb holes, each of which has an area of ​​A3, and the pore density of the connecting unit is D3=n3*A3 / S3; the pore density of one characteristic unit cluster is: D0=(n1*A1+n2*A2+n3*A3) / S0.

4. The method for preparing a laser-cut honeycomb-shaped active luminous traffic sign according to claim 3, It is characterized in that Step 2.2 includes, The characteristic unit cluster is laid out according to the load margin Q, the luminous area weight I, and the density weight T, and the layout satisfies the relationship , where K is the bulk modulus, G is the shear modulus, and v is the Poisson’s ratio of the material; The load margin is set by the format area of ​​the prefabricated signboard panel and the pre-installation height of the signboard to adjust the load margin of the signboard affected by wind force; the luminous area weight ensures the maximum light transmittance under the condition of satisfying the load margin. The density weight T is to ensure that the weight of the sign panel is reduced to the maximum extent possible while satisfying the load margin. ; Wherein, η is the weight fitting coefficient, 0<η<1, i=1, 2......n.

5. The method for preparing a laser-cut honeycomb-shaped active luminous traffic sign according to claim 4, It is characterized in that Step 2.3 includes, after the first layout of the characteristic unit cluster is completed, detecting that there are no main honeycomb units and rib honeycomb units in an area larger than the width of one of the connecting units, if the presence of the rib honeycomb units is detected in at least two directions of this area, filling this area with the rib honeycomb units, otherwise no filling is performed.

6. The method for preparing a laser-cut honeycomb-shaped active luminous traffic sign according to claim 5, It is characterized in that Step 2.4 includes, After filling, the intensity is uniformly fitted to the function Perform optimal variable fitting, wherein the variable factor xi (i=1,2,...n) can be any variable that affects the signboard, and the variable factor xi can include but is not limited to the pore density D0 of a characteristic unit cluster, and the pore density D1 of the main honeycomb unit after filling, the pore density D2 of the rib honeycomb unit, the pore density D3 of the connecting unit, etc.; according to the probability formula , the z value obtained when p takes the maximum value is the optimal weight combination, a is a constant, and ai are the weight coefficients of the corresponding variable factors xi.

7. The method for preparing a laser-cut honeycomb-shaped active luminous traffic sign according to claim 6, It is characterized in that Step 2.5 includes performing multiple iterations and experiments through finite element analysis simulation to find the best combination of the pore size, pore density and honeycomb pore spacing of the first honeycomb hole, the second honeycomb hole and the third honeycomb hole, and establishing the optimal pore layout model through a modified trial and error method.

8. The method for preparing a laser-cut honeycomb-shaped active luminous traffic sign according to claim 7, It is characterized in that The distance between two adjacent first honeycomb holes is smaller than the thickness of the signboard panel.

9. The method for preparing a laser-cut honeycomb font active luminous traffic sign according to claim 1, It is characterized in that Step 1 includes determining key parameters such as the format area of ​​the signboard panel, the format thickness of the signboard panel, the pre-installation height of the signboard, the wind load bearing capacity, and the material of the signboard panel.

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