A stereoscopic paint dot spray control method and system

Abstract

The application discloses a kind of stereoscopic lacquer point spraying control method and system, first establish an information base comprising preset finished product image and the stereoscopic lacquer point data information of the preset finished product image, then the image of current product to be sprayed is collected, the shape of lacquer point and primer color are selected, the stereoscopic lacquer point data information of current product to be sprayed is determined from the stereoscopic lacquer point data information of preset finished product image, according to the stereoscopic lacquer point data information and product color information to be sprayed corresponding to product to be sprayed, the spraying mode of spray gun, paint color and paint viscosity are debugged to carry out two spraying steps, first spray shadow, then spray lacquer point, and shadow and lacquer point are sprayed with intermediate coating, so as to present the spraying effect of stereoscopic lacquer point.

Description

Technical Field

[0001] This invention belongs to the field of paint spraying technology, and particularly relates to a method and control system for three-dimensional paint dot spraying control. Background Technology

[0002] Paint is a chemical mixture that can firmly cover the surface of an object, serving purposes such as protection, decoration, marking, and other special uses. Paint can be applied to products by spraying, using a spray gun or disc atomizer, and with the help of pressure or centrifugal force, dispersed into uniform and fine droplets, which are then applied to the surface of the object.

[0003] Many products in daily life require spray painting. The most common spraying method is to spray the entire product with the same color. In order to pursue the aesthetics of the product, a dot spraying method has emerged, which is to spray small dots of paint onto the product surface for decoration.

[0004] In response to the fact that the paint dots on existing dot spraying products on the market are simple flat dots, a dot spraying product with a three-dimensional effect was designed, but the existing painting process cannot achieve this effect. Summary of the Invention

[0005] To address the issue that existing dot spraying products on the market only produce a two-dimensional effect, this invention provides a three-dimensional dot spraying control method and system that can present a three-dimensional effect.

[0006] The technical solution of this invention is as follows:

[0007] This invention discloses a method for controlling three-dimensional paint droplet spraying, comprising the following steps:

[0008] S1. Collect preset finished product images, and obtain three-dimensional paint dot data information and color library information of several preset finished product images;

[0009] S2. Obtain the image of the product to be sprayed, select the paint dot shape, and retrieve the 3D paint dot data information of the corresponding product to be sprayed.

[0010] S3. Select the color of the primer, and retrieve the color information of the product to be sprayed, including the paint spot color and the shadow color corresponding to the paint spot.

[0011] S4. Based on the three-dimensional paint dot data and color information of the product to be sprayed, adjust the spraying mode, paint color and paint viscosity of the spray gun.

[0012] S5. Use the corresponding spray gun mode, paint color and paint viscosity to spray the shadow, and then spray the intermediate coat.

[0013] S6. Use another corresponding spray gun mode, paint color and paint viscosity to spray paint dots, and then spray the topcoat.

[0014] Furthermore, when performing step S1, acquiring the preset finished product image specifically includes the following sub-steps:

[0015] S11. Draw a pre-designed finished product image. Draw the sprayed product at a 1:1 scale using a computer according to the pre-designed plan.

[0016] S12. Establish coordinate axes on the already drawn product image of the sprayed product, draw the image of the first paint spot at the zero point, and obtain the coordinate parameters of the first paint spot.

[0017] S13. Based on the first paint spot image, draw the shadow image corresponding to the first paint spot to obtain the coordinate parameters of the shadow corresponding to the first paint spot.

[0018] S14. Based on the first paint dot drawn and its corresponding shadow, obtain the comprehensive coordinate parameters of the first three-dimensional paint dot, set the total number of all three-dimensional paint dots and the interval value between each three-dimensional paint dot, and lay out other three-dimensional paint dots of the same shape on the coordinate axis to obtain the three-dimensional paint dot data information of the preset finished image.

[0019] Further, in step S11, the predetermined design scheme includes several different paint dot shapes under the same sprayed product shape, corresponding paint dot shape dimensions, corresponding paint dot shape shadow shapes, corresponding paint dot shape shadow dimensions, distance values ​​between shadows and paint dots, shadow transparency values, shadow softening values, and shadow angle values, and the same paint dot shapes under different sprayed product shapes, corresponding paint dot shape dimensions, corresponding paint dot shape shadow shapes, corresponding paint dot shape shadow dimensions, distance values ​​between shadows and paint dots, shadow transparency values, shadow softening values, and shadow angle values.

[0020] Furthermore, the coordinate parameters of the first paint spot and the coordinate parameters of the shadow corresponding to the first paint spot have an 80% overlap rate.

[0021] Furthermore, in step S4, the spray gun mode adjustment includes a first spray gun mode and a second spray gun mode. Both the first and second spray gun modes include adjusting or selecting the nozzle shape of the spray gun, adjusting the air pressure value of the spray gun, setting the paint flow rate value of each spray, and setting the distance between the nozzle of the spray gun and the product to be sprayed. The first spray gun mode is used for spraying shadows, and the second spray gun mode is used for spraying paint dots.

[0022] Further, in step S4, when the area of ​​one side of the product to be sprayed is not greater than 0.002㎡, the first spray gun module has an air pressure of 0.2Mpa-0.5Mpa, a paint flow rate of 0.1L / min-0.3L / min per spray, and a distance of 25-30cm between the nozzle of the spray gun and the product to be sprayed; the second spray gun module has an air pressure of 0.6Mpa-1Mpa, a paint flow rate of 0.3L / min-0.6L / min per spray, and a distance of 20-25cm between the nozzle of the spray gun and the product to be sprayed.

[0023] Further, in step S4, when the area of ​​one side of the product to be sprayed is greater than 0.002㎡ and less than 0.01㎡, the first spray gun module has an air pressure of 0.5Mpa-0.8Mpa, a paint flow rate of 0.2L / min-0.5L / min per spray, and a distance of 25-30cm between the nozzle of the spray gun and the product to be sprayed; the second spray gun module has an air pressure of 0.8Mpa-1.2Mpa, a paint flow rate of 0.5L / min-0.8L / min per spray, and a distance of 20-25cm between the nozzle of the spray gun and the product to be sprayed.

[0024] This invention also discloses a three-dimensional paint dot spraying control system, including an image acquisition module, a data processing module, a storage module, and a main control module.

[0025] The image acquisition module is used to acquire images of the product to be sprayed and send the images of the product to be sprayed to the data processing module;

[0026] The data processing module is used to draw several preset finished product images and generate corresponding three-dimensional paint dot data for the preset finished product images, match the corresponding preset finished product image according to the image of the product to be sprayed, match the shadow shape that matches the paint dot according to the determined image of the product to be sprayed and the determined paint dot shape, and obtain the three-dimensional paint dot data of the product to be sprayed, match the color information of the corresponding three-dimensional paint dot and the color information of the corresponding shadow according to the determined primer color, and send the three-dimensional paint dot data of the preset finished product image, the three-dimensional paint dot data of the product to be sprayed and the color information to the storage module.

[0027] Several preset finished product images are drawn and corresponding three-dimensional paint dot data is generated. This includes calculating the total surface area of ​​the preset finished product based on the images of the preset finished product; calculating and setting the number of sub-regions to be divided into the preset finished product based on the total area value; calculating and setting the sub-area value of each sub-region; calculating the coordinate parameters of each preset paint dot on the preset finished product based on the preset paint dots; calculating the coordinate parameters of the shadow corresponding to each preset paint dot on the preset finished product based on the preset paint dots; calculating the number of preset paint dots on the preset finished product based on the preset paint dots; calculating the area value of preset paint dots on the preset finished product based on the preset paint dots; and calculating the corresponding shadow area value on the preset finished product based on the preset paint dots. Finally, three-dimensional paint dot data of the preset finished product image is formed, which includes the total surface area of ​​the preset finished product, the number of sub-regions, the sub-area value of the sub-regions, the coordinate parameters of each paint dot, the coordinate parameters of the corresponding shadow, the number of pre-sprayed paint dots on each sub-region, the area value of the paint dots, and the corresponding shadow area value.

[0028] Based on the determined image of the product to be sprayed and the determined shape of the paint dots, a shadow shape matching the paint dots is obtained to acquire three-dimensional paint dot data of the product image. This includes calculating the total surface area of ​​the product to be sprayed based on the current image of the product; calculating and setting the number of sub-regions to be divided based on the total area; calculating and setting the sub-area value of each sub-region; calculating the coordinate parameters of each preset paint dot on the product based on preset paint dots; and calculating the coordinate parameters of the shadow corresponding to each preset paint dot on the product based on preset paint dots. The process involves calculating the number of pre-set paint dots on the product to be sprayed based on the pre-set paint dots, calculating the area value of the pre-set paint dots on the pre-set finished product based on the pre-set paint dots, and calculating the corresponding shadow area value on the pre-set finished product based on the pre-set paint dots. Finally, a three-dimensional paint dot data of the product image to be sprayed is formed, which includes information on the total surface area of ​​the product to be sprayed, information on the number of sub-regions, information on the sub-area values ​​of the sub-regions, coordinate parameters of each paint dot, coordinate parameters of the corresponding shadow, the number of pre-sprayed paint dots on each sub-region, the area value of the paint dots, and the corresponding shadow area value.

[0029] Based on the determined primer color, the corresponding paint spot color and the shadow color corresponding to the paint spot are matched. This includes building a color library of several color groups consisting of primer color, paint spot color and shadow color corresponding to the paint spot. Finally, the color information of the product to be sprayed is formed, which includes the primer color, the corresponding three-dimensional paint spot color and the shadow color corresponding to the paint spot.

[0030] The storage module is used to store images of each preset finished product, three-dimensional paint dot data information of each preset finished product, images of each product to be sprayed, three-dimensional paint dot data information of each product to be sprayed, color library information of several color groups consisting of primer color, paint dot color and shadow color corresponding to the paint dot, total surface area value of preset finished products, number of sub-regions, sub-area value of sub-regions, number of pre-sprayed paint dots on each sub-region, coordinate parameter information of each paint dot and coordinate parameter information of the corresponding shadow, and sends the stored data information to the main control module.

[0031] The main control module is used to adjust the spray gun mode, paint color, and paint viscosity based on the data information from the storage module, and to generate control commands to control the spraying of three-dimensional paint dots based on the three-dimensional paint dot data and color information of the product to be sprayed from the data processing unit.

[0032] Furthermore, the data processing module includes a drawing unit, a calculation unit, and a matching unit;

[0033] The drawing unit is used to draw a preset finished product image;

[0034] The calculation unit is used to calculate the following information: the total surface area of ​​the pre-sprayed finished product, the number of sub-regions, the sub-area value of each sub-region, the number of pre-sprayed paint dots on each sub-region, the coordinate parameters of each paint dot, the coordinate parameters of the corresponding shadow, the area value of the paint dot and the corresponding shadow area value, the total surface area of ​​the product to be sprayed, the number of sub-regions, the sub-area value of each sub-region, the number of pre-sprayed paint dots on each sub-region, the coordinate parameters of each paint dot, the coordinate parameters of the corresponding shadow, the area value of the paint dot and the corresponding shadow area value.

[0035] The matching unit is used to match the corresponding preset finished product image according to the image of the product to be sprayed, match the corresponding shadow shape according to the selected paint spot shape, and match the paint spot color and the corresponding shadow color according to the selected primer color.

[0036] Furthermore, the main control module includes a parameter adjustment unit and an instruction sending unit;

[0037] The parameter adjustment unit is used to adjust the spray gun mode, paint color, and paint viscosity according to the data information of the storage module;

[0038] The instruction sending unit is used to generate control instructions to control the spraying of three-dimensional paint dots based on the three-dimensional paint dot data and color information of the product to be sprayed from the data processing unit.

[0039] The beneficial effects of this invention are as follows: In order to solve the problem that the paint dots of existing dot spraying products cannot present a three-dimensional effect, an information database containing a preset finished product image and the three-dimensional paint dot data information of the preset finished product image is first established. Then, the image of the product to be sprayed is collected, the paint dot shape and the primer color are selected, and the three-dimensional paint dot data information of the product to be sprayed is determined from the three-dimensional paint dot data information of the preset finished product image. According to the three-dimensional paint dot data information and the color information of the product to be sprayed, the spraying mode, paint color and paint viscosity of the spray gun are adjusted to perform a two-step spraying process. First, the shadow is sprayed, and then the paint dots are sprayed. A mid-coat is sprayed between the shadow and the paint dots, thereby presenting a three-dimensional paint dot spraying effect. Attached Figure Description

[0040] Figure 1 This is a flowchart illustrating a three-dimensional paint dot spraying control method according to the present invention;

[0041] Figure 2 This is a schematic diagram of the framework structure of a three-dimensional paint dot spraying control system according to the present invention. Detailed Implementation

[0042] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0043] Please refer to Figure 1 This invention discloses a method for controlling three-dimensional paint droplet spraying, comprising the following steps:

[0044] S1. Collect preset finished product images, obtain three-dimensional paint dot data information of several preset finished product images and color library information of preset finished product images. The color library information is the paint dot color that has been matched with the base coat color and the shadow color corresponding to the paint dot.

[0045] S2. Obtain the image of the product to be sprayed, select the paint dot shape, and retrieve the 3D paint dot data information of the corresponding product to be sprayed.

[0046] S3. Select the color of the primer, and retrieve the color information of the product to be sprayed, including the paint spot color and the shadow color corresponding to the paint spot.

[0047] S4. Based on the three-dimensional paint dot data and color information of the product to be sprayed, adjust the spraying mode, paint color and paint viscosity of the spray gun.

[0048] S5. Use the corresponding spray gun mode, paint color and paint viscosity to spray the shadow, and then spray the intermediate coat.

[0049] S6. Use another corresponding spray gun mode, paint color and paint viscosity to spray paint dots, and then spray the topcoat.

[0050] Specifically, whether it is the data information of the three-dimensional paint dots in the preset finished image or the data information of the three-dimensional paint dots of the product to be sprayed, it includes the size of the paint dots, the shape and size of the shadow corresponding to the paint dots, the position parameters of each paint dot and its corresponding shadow, the area value of each surface of the product to be sprayed with three-dimensional paint dots, the distance value between the shadow and the paint dot, the transparency value of the shadow, the softness value of the shadow, and the angle value of the shadow.

[0051] Furthermore, when performing step S1, acquiring the preset finished product image specifically includes the following sub-steps:

[0052] S11. Draw a pre-designed finished product image. Draw the sprayed product at a 1:1 scale using a computer according to the pre-designed plan.

[0053] S12. Establish coordinate axes on the already drawn product image of the sprayed product, draw the image of the first paint spot at the zero point, and obtain the coordinate parameters of the first paint spot.

[0054] S13. Based on the first paint spot image, draw the shadow image corresponding to the first paint spot to obtain the coordinate parameters of the shadow corresponding to the first paint spot.

[0055] S14. Based on the first paint dot drawn and its corresponding shadow, obtain the comprehensive coordinate parameters of the first three-dimensional paint dot, set the total number of all three-dimensional paint dots and the interval value between each three-dimensional paint dot, and lay out other three-dimensional paint dots of the same shape on the coordinate axis to obtain the three-dimensional paint dot data information of the preset finished image.

[0056] Further, in step S11, the predetermined design scheme includes several different paint dot shapes under the same sprayed product shape, corresponding paint dot shape dimensions, corresponding paint dot shape shadow shapes, corresponding paint dot shape shadow dimensions, distance values ​​between shadows and paint dots, shadow transparency values, shadow softening values, and shadow angle values, and the same paint dot shapes under different sprayed product shapes, corresponding paint dot shape dimensions, corresponding paint dot shape shadow shapes, corresponding paint dot shape shadow dimensions, distance values ​​between shadows and paint dots, shadow transparency values, shadow softening values, and shadow angle values.

[0057] Furthermore, the coordinate parameters of the first paint spot and the coordinate parameters of the shadow corresponding to the first paint spot have an 80% overlap rate.

[0058] Furthermore, in step S4, the spray gun mode adjustment includes a first spray gun mode and a second spray gun mode. Both the first and second spray gun modes include adjusting or selecting the nozzle shape of the spray gun, adjusting the air pressure value of the spray gun, setting the paint flow rate value of each spray, and setting the distance between the nozzle of the spray gun and the product to be sprayed. The first spray gun mode is used for spraying shadows, and the second spray gun mode is used for spraying paint dots.

[0059] Specifically, when the sprayed paint dots are circular, the holes on the nozzle of the spray gun are circular and distributed in a spiral pattern on the nozzle.

[0060] Based on the principles of three-dimensional composition, the area of ​​the paint dot is set to be slightly larger than or equal to the area of ​​the shadow. When the paint dot is circular, the distance between the shadow and the paint dot, i.e., the distance between the two centers of the circle, can be set to 1-2mm. The transparency value of the shadow can be set to 60%, which is generally determined by the color of the shadow. The softness value of the shadow, i.e., the distance between the circumference of the shadow and the circumference of the paint dot, can be set to 2-4mm. The angle value of the shadow, i.e., the direction of the shadow, can be any one of 360°, and can be set to 190°, i.e., the lower right corner of the paint dot.

[0061] Further, in step S4, when the area of ​​one side of the product to be sprayed is not greater than 0.002㎡, the first spray gun module has an air pressure of 0.2Mpa-0.5Mpa, a paint flow rate of 0.1L / min-0.3L / min per spray, and a distance of 25-30cm between the nozzle of the spray gun and the product to be sprayed; the second spray gun module has an air pressure of 0.6Mpa-1Mpa, a paint flow rate of 0.3L / min-0.6L / min per spray, and a distance of 20-25cm between the nozzle of the spray gun and the product to be sprayed.

[0062] Further, in step S4, when the area of ​​one side of the product to be sprayed is greater than 0.002㎡ and less than 0.01㎡, the first spray gun module has an air pressure of 0.5Mpa-0.8Mpa, a paint flow rate of 0.2L / min-0.5L / min per spray, and a distance of 25-30cm between the nozzle of the spray gun and the product to be sprayed; the second spray gun module has an air pressure of 0.8Mpa-1.2Mpa, a paint flow rate of 0.5L / min-0.8L / min per spray, and a distance of 20-25cm between the nozzle of the spray gun and the product to be sprayed.

[0063] Reference Figure 2 The present invention also discloses a three-dimensional paint dot spraying control system, including an image acquisition module, a data processing module, a storage module, and a main control module.

[0064] The image acquisition module is used to acquire images of the product to be sprayed and send the images of the product to be sprayed to the data processing module;

[0065] The data processing module is used to draw several preset finished product images and generate corresponding three-dimensional paint dot data for the preset finished product images, match the corresponding preset finished product image according to the image of the product to be sprayed, match the shadow shape that matches the paint dot according to the determined image of the product to be sprayed and the determined paint dot shape, and obtain the three-dimensional paint dot data of the product to be sprayed, match the color information of the corresponding three-dimensional paint dot and the color information of the corresponding shadow according to the determined primer color, and send the three-dimensional paint dot data of the preset finished product image, the three-dimensional paint dot data of the product to be sprayed and the color information to the storage module.

[0066] Several preset finished product images are drawn and corresponding three-dimensional paint dot data is generated. This includes calculating the total surface area of ​​the preset finished product based on the images of the preset finished product; calculating and setting the number of sub-regions to be divided into the preset finished product based on the total area value; calculating and setting the sub-area value of each sub-region; calculating the coordinate parameters of each preset paint dot on the preset finished product based on the preset paint dots; calculating the coordinate parameters of the shadow corresponding to each preset paint dot on the preset finished product based on the preset paint dots; calculating the number of preset paint dots on the preset finished product based on the preset paint dots; calculating the area value of preset paint dots on the preset finished product based on the preset paint dots; and calculating the corresponding shadow area value on the preset finished product based on the preset paint dots. Finally, three-dimensional paint dot data of the preset finished product image is formed, which includes the total surface area of ​​the preset finished product, the number of sub-regions, the sub-area value of the sub-regions, the coordinate parameters of each paint dot, the coordinate parameters of the corresponding shadow, the number of pre-sprayed paint dots on each sub-region, the area value of the paint dots, and the corresponding shadow area value.

[0067] Based on the determined image of the product to be sprayed and the determined shape of the paint dots, a shadow shape matching the paint dots is obtained to acquire three-dimensional paint dot data of the product image. This includes calculating the total surface area of ​​the product to be sprayed based on the current image of the product; calculating and setting the number of sub-regions to be divided based on the total area; calculating and setting the sub-area value of each sub-region; calculating the coordinate parameters of each preset paint dot on the product based on preset paint dots; and calculating the coordinate parameters of the shadow corresponding to each preset paint dot on the product based on preset paint dots. The process involves calculating the number of pre-set paint dots on the product to be sprayed based on the pre-set paint dots, calculating the area value of the pre-set paint dots on the pre-set finished product based on the pre-set paint dots, and calculating the corresponding shadow area value on the pre-set finished product based on the pre-set paint dots. Finally, a three-dimensional paint dot data of the product image to be sprayed is formed, which includes information on the total surface area of ​​the product to be sprayed, information on the number of sub-regions, information on the sub-area values ​​of the sub-regions, coordinate parameters of each paint dot, coordinate parameters of the corresponding shadow, the number of pre-sprayed paint dots on each sub-region, the area value of the paint dots, and the corresponding shadow area value.

[0068] Based on the determined primer color, the corresponding paint spot color and the shadow color corresponding to the paint spot are matched. This includes building a color library of several color groups consisting of primer color, paint spot color and shadow color corresponding to the paint spot. Finally, the color information of the product to be sprayed is formed, which includes the primer color, the corresponding three-dimensional paint spot color and the shadow color corresponding to the paint spot.

[0069] The storage module is used to store images of each preset finished product, three-dimensional paint dot data information of each preset finished product, images of each product to be sprayed, three-dimensional paint dot data information of each product to be sprayed, color library information of several color groups consisting of primer color, paint dot color and shadow color corresponding to the paint dot, total surface area value of preset finished products, number of sub-regions, sub-area value of sub-regions, number of pre-sprayed paint dots on each sub-region, coordinate parameter information of each paint dot and coordinate parameter information of the corresponding shadow, and sends the stored data information to the main control module.

[0070] The main control module is used to adjust the spray gun mode, paint color, and paint viscosity based on the data information from the storage module, and to generate control commands to control the spraying of three-dimensional paint dots based on the three-dimensional paint dot data and color information of the product to be sprayed from the data processing unit.

[0071] Furthermore, the data processing module includes a drawing unit, a calculation unit, and a matching unit;

[0072] The drawing unit is used to draw a preset finished product image;

[0073] The calculation unit is used to calculate the following information: the total surface area of ​​the pre-sprayed finished product, the number of sub-regions, the sub-area value of each sub-region, the number of pre-sprayed paint dots on each sub-region, the coordinate parameters of each paint dot, the coordinate parameters of the corresponding shadow, the area value of the paint dot and the corresponding shadow area value, the total surface area of ​​the product to be sprayed, the number of sub-regions, the sub-area value of each sub-region, the number of pre-sprayed paint dots on each sub-region, the coordinate parameters of each paint dot, the coordinate parameters of the corresponding shadow, the area value of the paint dot and the corresponding shadow area value.

[0074] The matching unit is used to match the corresponding preset finished product image according to the image of the product to be sprayed, match the corresponding shadow shape according to the selected paint spot shape, and match the paint spot color and the corresponding shadow color according to the selected primer color.

[0075] Furthermore, the main control module includes a parameter adjustment unit and an instruction sending unit;

[0076] The parameter adjustment unit is used to adjust the spray gun mode, paint color, and paint viscosity according to the data information of the storage module;

[0077] The instruction sending unit is used to generate control instructions to control the spraying of three-dimensional paint dots based on the three-dimensional paint dot data and color information of the product to be sprayed from the data processing unit.

[0078] The above-described embodiments are merely one implementation of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for controlling three-dimensional paint dot spraying, characterized in that, Includes the following steps: S1. Collect preset finished product images, and obtain three-dimensional paint dot data information and color library information of several preset finished product images; S2. Obtain the image of the product to be sprayed, select the paint dot shape, and retrieve the 3D paint dot data information of the corresponding product to be sprayed. S3. Select the color of the primer, and retrieve the color information of the product to be sprayed, including the paint spot color and the shadow color corresponding to the paint spot. S4. Based on the three-dimensional paint dot data and color information of the product to be sprayed, adjust the spraying mode, paint color and paint viscosity of the spray gun. S5. Use the corresponding spray gun mode, paint color and paint viscosity to spray the shadow, and then spray the intermediate coat. S6. Use another corresponding spray gun mode, paint color and paint viscosity to spray paint dots, and then spray the topcoat. When performing step S1, acquiring the preset finished product image specifically includes the following sub-steps: S11. Draw a pre-designed finished product image. Draw the product to be sprayed at a 1:1 scale using a computer according to the pre-designed plan. S12. Establish coordinate axes on the already drawn product image of the sprayed product, draw the image of the first paint spot at the zero point, and obtain the coordinate parameters of the first paint spot. S13. Based on the first paint spot image, draw the shadow image corresponding to the first paint spot to obtain the coordinate parameters of the shadow corresponding to the first paint spot. S14. Based on the first paint dot drawn and its corresponding shadow, obtain the comprehensive coordinate parameters of the first three-dimensional paint dot, set the total number of all three-dimensional paint dots and the interval value between each three-dimensional paint dot, and lay out other three-dimensional paint dots of the same shape on the coordinate axis to obtain the three-dimensional paint dot data information of the preset finished image. In step S11, the predetermined design scheme includes several different paint dot shapes under the same sprayed product shape, corresponding paint dot shape dimensions, corresponding paint dot shape shadow shapes, corresponding paint dot shape shadow dimensions, distance values ​​between shadows and paint dots, shadow transparency values, shadow softening values, and shadow angle values, and the same paint dot shapes under different sprayed product shapes, corresponding paint dot shape dimensions, corresponding paint dot shape shadow shapes, corresponding paint dot shape shadow dimensions, distance values ​​between shadows and paint dots, shadow transparency values, shadow softening values, and shadow angle values.

2. The method for controlling three-dimensional paint dot spraying according to claim 1, characterized in that, The coordinate parameters of the first paint spot and the coordinate parameters of the shadow corresponding to the first paint spot have an 80% overlap rate.

3. The method for controlling three-dimensional paint dot spraying according to claim 1, characterized in that, In step S4, adjusting the spray gun mode includes a first spray gun mode and a second spray gun mode. Both the first and second spray gun modes include adjusting or selecting the nozzle shape of the spray gun, adjusting the air pressure value of the spray gun, setting the paint flow rate value of each spray from the spray gun, and setting the distance between the nozzle of the spray gun and the product to be sprayed. The first spray gun mode is used for spraying shadows, and the second spray gun mode is used for spraying paint dots.

4. The method for controlling three-dimensional paint dot spraying according to claim 2, characterized in that, In step S4, when the area of ​​one side of the product to be sprayed is not greater than 0.002㎡, the first spray gun mode is characterized by an air pressure of 0.2Mpa-0.5Mpa, a paint flow rate of 0.1L / min-0.3L / min per spray, and a distance of 25-30cm between the nozzle and the product to be sprayed. The second spray gun mode is characterized by an air pressure of 0.6Mpa-1Mpa, a paint flow rate of 0.3L / min-0.6L / min per spray, and a distance of 20-25cm between the nozzle and the product to be sprayed.

5. The method for controlling three-dimensional paint dot spraying according to claim 2, characterized in that, In step S4, when the area of ​​one side of the product to be sprayed is greater than 0.002㎡ and less than 0.01㎡, the first spray gun mode is characterized by an air pressure of 0.5Mpa-0.8Mpa, a paint flow rate of 0.2L / min-0.5L / min per spray, and a distance of 25-30cm between the nozzle and the product to be sprayed. The second spray gun mode is characterized by an air pressure of 0.8Mpa-1.2Mpa, a paint flow rate of 0.5L / min-0.8L / min per spray, and a distance of 20-25cm between the nozzle and the product to be sprayed.

6. A three-dimensional paint dot spraying control system, characterized in that, It includes an image acquisition module, a data processing module, a storage module, and a main control module. The image acquisition module is used to acquire images of the product to be sprayed and send the images of the product to be sprayed to the data processing module; The data processing module is used to draw several preset finished product images and generate corresponding three-dimensional paint dot data for the preset finished product images, match the corresponding preset finished product image according to the image of the product to be sprayed, match the shadow shape that matches the paint dot according to the determined image of the product to be sprayed and the determined paint dot shape, and obtain the three-dimensional paint dot data of the product to be sprayed, match the color information of the corresponding three-dimensional paint dot and the color information of the corresponding shadow according to the determined primer color, and send the three-dimensional paint dot data of the preset finished product image, the three-dimensional paint dot data of the product to be sprayed and the color information to the storage module. Several preset finished product images are drawn and corresponding three-dimensional paint dot data is generated. This includes calculating the total surface area of ​​the preset finished product based on the images of the preset finished product; calculating and setting the number of sub-regions to be divided into the preset finished product based on the total area value; calculating and setting the sub-area value of each sub-region; calculating the coordinate parameters of each preset paint dot on the preset finished product based on the preset paint dots; calculating the coordinate parameters of the shadow corresponding to each preset paint dot on the preset finished product based on the preset paint dots; calculating the number of preset paint dots on the preset finished product based on the preset paint dots; calculating the area value of preset paint dots on the preset finished product based on the preset paint dots; and calculating the corresponding shadow area value on the preset finished product based on the preset paint dots. Finally, three-dimensional paint dot data of the preset finished product image is formed, which includes the total surface area of ​​the preset finished product, the number of sub-regions, the sub-area value of the sub-regions, the coordinate parameters of each paint dot, the coordinate parameters of the corresponding shadow, the number of pre-sprayed paint dots on each sub-region, the area value of the paint dots, and the corresponding shadow area value. Based on the determined image of the product to be sprayed and the determined shape of the paint dots, the shadow shape that matches the paint dots is matched to obtain the three-dimensional paint dot data of the image of the product to be sprayed. This includes calculating the total surface area of ​​the product to be sprayed based on the current image of the product to be sprayed, calculating and setting the number of sub-regions to be divided into the product to be sprayed based on the total area value, calculating and setting the sub-area value of each sub-region, calculating the coordinate parameters of each preset paint dot on the product to be sprayed based on the preset paint dots, calculating the coordinate parameters of the shadow corresponding to each preset paint dot on the product to be sprayed based on the preset paint dots, calculating the number of preset paint dots on the product to be sprayed based on the preset paint dots, calculating the area value of preset paint dots on the preset finished product based on the preset paint dots, and calculating the corresponding shadow area value on the preset finished product based on the preset paint dots. Finally, a three-dimensional paint dot data of the image of the product to be sprayed is formed, which includes the total surface area of ​​the product to be sprayed, the number of sub-regions, the sub-area value of the sub-regions, the coordinate parameters of each paint dot, the coordinate parameters of the corresponding shadow, the number of pre-sprayed paint dots on each sub-region, the area value of the paint dots, and the corresponding shadow area value. Based on the determined primer color, the corresponding paint spot color and the shadow color corresponding to the paint spot are matched. This includes building a color library of several color groups consisting of primer color, paint spot color and shadow color corresponding to the paint spot. Finally, the color information of the product to be sprayed is formed, which includes the primer color, the corresponding three-dimensional paint spot color and the shadow color corresponding to the paint spot. The storage module is used to store images of each preset finished product, three-dimensional paint dot data information of each preset finished product, images of each product to be sprayed, three-dimensional paint dot data information of each product to be sprayed, color library information of several color groups consisting of primer color, paint dot color and shadow color corresponding to the paint dot, total surface area value of preset finished products, number of sub-regions, sub-area value of sub-regions, number of pre-sprayed paint dots on each sub-region, coordinate parameter information of each paint dot and coordinate parameter information of the corresponding shadow, and sends the stored data information to the main control module. The main control module is used to adjust the spray gun mode, paint color, and paint viscosity based on the data information from the storage module, and to generate control commands to control the spraying of three-dimensional paint dots based on the three-dimensional paint dot data and color information of the product to be sprayed from the data processing unit.

7. The three-dimensional paint dot spraying control system according to claim 6, characterized in that, The data processing module includes a drawing unit, a calculation unit, and a matching unit; The drawing unit is used to draw a preset finished product image; The calculation unit is used to calculate the following information: the total surface area of ​​the pre-sprayed finished product, the number of sub-regions, the sub-area value of each sub-region, the number of pre-sprayed paint dots on each sub-region, the coordinate parameters of each paint dot, the coordinate parameters of the corresponding shadow, the area value of the paint dot and the corresponding shadow area value, the total surface area of ​​the product to be sprayed, the number of sub-regions, the sub-area value of each sub-region, the number of pre-sprayed paint dots on each sub-region, the coordinate parameters of each paint dot, the coordinate parameters of the corresponding shadow, the area value of the paint dot and the corresponding shadow area value. The matching unit is used to match the corresponding preset finished product image according to the image of the product to be sprayed, match the corresponding shadow shape according to the selected paint spot shape, and match the paint spot color and the corresponding shadow color according to the selected primer color.

8. The three-dimensional paint dot spraying control system according to claim 6, characterized in that, The main control module includes a parameter adjustment unit and a command sending unit; The parameter adjustment unit is used to adjust the spray gun mode, paint color, and paint viscosity according to the data information of the storage module; The instruction sending unit is used to generate control instructions to control the spraying of three-dimensional paint dots based on the three-dimensional paint dot data and color information of the product to be sprayed from the data processing unit.

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