A PVC color film surface detection device and its detection method

Abstract

The present invention discloses a surface detection device for PVC color film and its detection method, which relates to the technical field of surface detection of PVC color film. It includes a base, and a detection mechanism is arranged on the upper side of the base. A first transmission mechanism and a second transmission mechanism are respectively arranged on both sides of the detection mechanism. The first transmission mechanism includes a bottom frame, and a first support plate and a second support plate are fixedly connected to the upper side of the bottom frame. A first conveying roller and a second conveying roller are respectively connected by bearings between the first support plate and the second support plate. After the light intensity of the light bulb is adjusted, the camera takes an image of the surface of the PVC color film, identifies the length of the broken lines on the surface of the PVC color film, and the supplementary spraying component adjusts the appropriate spraying length according to the length of the broken lines, and sprays the broken line area. This effectively prevents excessive ink from being sprayed onto the already sprayed lines, thereby avoiding the phenomenon that the thickness of the lines on the subsequent PVC color film surface is inconsistent, achieving the effect of automatically adjusting the supplementary spraying length.

Description

Technical Field

[0001] The invention relates to the technical field of PVC color film surface detection, and more specifically, to a PVC color film surface detection device and a detection method thereof. Background Art

[0002] PVC color film is a colored film made of PVC (polyvinyl chloride) as raw material. It is usually formed into a film of various colors and patterns by printing or coating on a PVC substrate.

[0003] The texture on the surface of PVC color film is an important appearance feature. Cracks will affect the overall appearance of the product. Through crack detection, these defects can be discovered and handled in time to ensure that the product appearance meets the standards. Cracks may reduce the strength and toughness of the material and affect its durability during use. For example, if there are cracks on PVC color film used for architectural decoration, it may crack or fall off during installation or use.

[0004] Existing PVC color film surface inspection is usually carried out using a camera. When a crack is detected, a nozzle will be used to re-spray ink. Due to the inconsistent length of the cracks, excess ink will be sprayed onto the already sprayed texture during re-spraying, resulting in inconsistent texture thickness on the subsequent PVC color film surface. Inconsistent texture thickness will make the visual effect of the PVC color film uneven, affecting the appearance of the product. Textures with inconsistent thickness may cause the strength and toughness of the material to decrease. During use, thinner areas may be more prone to scratches, cracks or breakage, affecting the durability of the product.

[0005] Therefore, it is necessary to design a PVC color film surface detection device with high detection accuracy and automatic adjustment of the re-spraying length to improve the above-mentioned technical problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the object of the present invention is to provide a PVC color film surface detection device and a detection method thereof.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: a PVC color film surface detection device, comprising a base, a detection mechanism is provided on the upper side of the base, and a first transmission mechanism and a second transmission mechanism are provided on both sides of the detection mechanism.

[0008] The present invention is further configured as follows: The first transmission mechanism includes a chassis, and a first support plate and a second support plate are fixedly connected to the upper side of the chassis. A first conveying roller and a second conveying roller are respectively connected by bearings between the first support plate and the second support plate. A motor is fixedly connected to the upper side of the chassis. A speed reducer is provided on one side of the motor and is fixedly connected to the chassis. The output end of the motor is fixedly connected to the input end of the speed reducer. The output end of the speed reducer is fixedly connected to a second gear. A first gear is fixedly connected to one end of each of the first conveying roller and the second conveying roller. The first gear is meshed with the second gear.

[0009] The present invention is further configured as follows: The detection mechanism includes a detection table. A supplementary spraying component for supplementary spraying of the broken lines of the PVC color film is provided on the upper side of the detection table. A lighting adjustment component for illuminating the surface of the PVC color film is provided inside the detection table. A drying component for drying the ink for supplementary spraying is provided on one side of the supplementary spraying component.

[0010] The present invention is further configured as follows: The drying component includes two third support plates fixedly connected to the upper side of the detection table. An installation frame is fixedly connected between the two third support plates. An air duct is fixedly connected inside the installation frame. Electric fans are fixedly connected to both sides inside the air duct. A plurality of air outlet holes are provided on the lower side of the air duct. A heating pipe is fixedly connected inside the installation frame.

[0011] The present invention is further configured as follows: The supplementary spraying component includes two fourth support plates fixedly connected to the upper side of the detection table. A first electric slide rail is fixedly connected between the two fourth support plates. A camera is fixedly connected to the lower side of the first electric slide rail. A slide plate is fixedly connected to the sliding end of the first electric slide rail. A cylinder is fixedly connected to one side of the slide plate. The output end of the cylinder is fixedly connected to a fixing plate. The fixing plate is slidably connected to the slide plate. An ink cylinder is fixedly connected to the upper side of the fixing plate. A nozzle is fixedly connected to the lower side of the fixing plate. The ink cylinder is communicated with the nozzle through a pipeline. A length adjustment module for adjusting the length of the supplementary ink spraying is provided below the nozzle.

[0012] By providing the supplementary spraying component and the drying component, when there are broken lines on the surface of the PVC color film, the first electric slide rail controls the nozzle to slide, and the output end of the cylinder extends to control the nozzle to move downward, so as to control the nozzle to perform supplementary spraying on the broken lines in different areas of the PVC color film, effectively preventing the phenomenon that the broken lines on the surface of the PVC color film cannot be processed in time. And after the inkjet is completed, the supplementary ink area is dried in time, effectively preventing the phenomenon that the ink spreads on the surface of the PVC color film, resulting in blurred patterns.

[0013] The present invention is further configured such that: the length adjustment module includes an ink guide cartridge fixedly connected to the lower side of the nozzle, the output end of the nozzle penetrates the ink guide cartridge, one side of the ink guide cartridge is fixedly connected with a double-headed cylinder, the two output ends of the double-headed cylinder are respectively fixedly connected with a first connecting plate and a second connecting plate, the other end of the first connecting plate is fixedly connected with a first connecting rod, one end of the second connecting plate is fixedly connected with a second connecting rod, the other ends of the first connecting rod and the second connecting plate both penetrate the ink guide cartridge, the other end of the first connecting rod is fixedly connected with a first limiting plate, the other end of the second connecting rod is fixedly connected with a second limiting plate, and both the second limiting plate and the first limiting plate are slidably connected to the inside of the ink guide cartridge.

[0014] After the light intensity of the bulb is adjusted, the camera takes an image of the surface of the PVC color film, identifies the length of the broken lines on the surface of the PVC color film, and the supplementary spraying component adjusts the appropriate spraying length according to the length of the broken lines, and sprays the broken line area supplementary, effectively preventing too much ink from being sprayed on the already sprayed lines, thereby causing the phenomenon that the thickness of the lines on the subsequent PVC color film surface is inconsistent, achieving the effect of automatically adjusting the supplementary spraying length.

[0015] The present invention is further configured such that: the light adjustment component includes a second electric slide rail fixedly connected to the inside of the detection table, the sliding end of the second electric slide rail is fixedly connected with a guide plate, several guide chutes are provided inside the guide plate, a third electric slide rail is fixedly connected to one side of the guide plate, and a lifting lamp module is provided at the sliding end of the third electric slide rail.

[0016] The present invention is further configured such that: the lifting lamp module includes an electric push rod fixedly connected to the sliding end of the third electric slide rail, the output end of the electric push rod is fixedly connected with a first magnetic attraction block, a fixed column is provided inside the guide chute, a second magnetic attraction block is fixedly connected to the lower side of the fixed column, a bulb is fixedly connected to one side of the fixed column, a support plate is fixedly connected to the lower side of the fixed column, a telescopic rod is fixedly connected to the lower side of the support plate, a sliding column is fixedly connected to the lower side of the telescopic rod, a limiting column is provided on the outer side of the sliding column, a conical cavity is provided inside the limiting column, the upper part of the conical cavity is in interference fit with the sliding column, and the lower part of the conical cavity is in clearance fit with the sliding column.

[0017] The surface of the PVC color film is photographed and imaged by a camera to identify the distributed colors of each area on the surface of the PVC color film. The lighting adjustment component continuously moves to illuminate the surface of the PVC color film, and automatically adjusts the lighting intensity of each area according to the colors distributed in each area, preventing the phenomenon that when there are different shades in multiple areas on the surface of the PVC color film, the light intensity cannot be freely adjusted by area, avoiding overexposure of light-colored patterns and loss of details in light-colored areas, and underexposure of dark-colored patterns and inability to identify details in dark-colored areas, thereby resulting in inaccurate identification of the length of broken patterns. It achieves the effect of high accuracy in identifying the length of broken patterns on the surface of the PVC color film.

[0018] A detection method for a PVC color film surface detection device, using the above-mentioned PVC color film surface detection device, includes the following steps:

[0019] S1: The first transmission mechanism transports the PVC color film into the detection mechanism.

[0020] S2: The camera photographs and images the surface of the PVC color film, and first identifies the distributed colors of each area on the surface of the PVC color film.

[0021] S3: The lighting adjustment component continuously moves to illuminate the surface of the PVC color film, and automatically adjusts the lighting intensity of each area according to the colors distributed in each area.

[0022] S4: During the illumination of the lighting adjustment component, the camera photographs and images the surface of the PVC color film to identify the length of the broken pattern on the surface of the PVC color film.

[0023] S5: The supplementary spraying component adjusts the appropriate spraying length according to the length of the broken pattern and performs supplementary spraying on the broken pattern area.

[0024] S6: The drying component then dries the supplementary spraying area, and the second transmission mechanism transports the PVC color film after detection out of the detection mechanism.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. By setting the supplementary spraying component and the drying component, when there is a broken pattern on the surface of the PVC color film, the first electric slide rail controls the nozzle to slide, and the output end of the cylinder extends to control the nozzle to move downward, thereby controlling the nozzle to perform supplementary spraying on the broken patterns in different areas of the PVC color film, effectively preventing the phenomenon that the broken patterns on the surface of the PVC color film cannot be processed in time, and after the inkjet is completed, drying the supplementary ink area in time, effectively preventing the ink from spreading on the surface of the PVC color film and resulting in blurred patterns.

[0027] 2. The camera takes an image of the surface of the PVC color film, identifies the distribution color of each area on the surface of the PVC color film, the lighting adjustment component continuously moves to illuminate the surface of the PVC color film, and automatically adjusts the lighting intensity of each area according to the color distributed in each area, preventing the phenomenon that when there are multi - area uneven shades on the surface of the PVC color film, the light intensity cannot be freely adjusted by area, avoiding over - exposure of light color patterns and loss of details in light - colored areas, and under - exposure of dark color patterns and inability to identify details in dark - colored areas, thus resulting in inaccurate identification of the length of broken patterns. It achieves the effect of high accuracy in identifying the length of broken patterns on the surface of the PVC color film.

[0028] 3. After the adjustment of the light intensity of the bulb is completed, the camera takes an image of the surface of the PVC color film to identify the length of the broken pattern on the surface of the PVC color film. The supplementary spraying component adjusts the appropriate spraying length according to the length of the broken pattern and sprays the broken pattern area, effectively preventing excessive ink from being sprayed onto the already sprayed patterns, thus avoiding the phenomenon of inconsistent pattern thickness on the subsequent surface of the PVC color film, and achieving the effect of automatically adjusting the supplementary spraying length. Brief Description of the Drawings

[0029] Figure 1 It is a schematic diagram of the overall structure of a PVC color film surface detection device of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of the first transmission mechanism in the present invention;

[0031] Figure 3 It is a schematic diagram of the structure of the detection mechanism in the present invention;

[0032] Figure 4 It is a schematic diagram of the structure of the drying component in the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of the supplementary spraying component in the present invention;

[0034] Figure 6 It is a partial cross - sectional view schematic diagram of the length adjustment module in the present invention;

[0035] Figure 7 It is a schematic diagram of the structure of the lighting adjustment component in the present invention;

[0036] Figure 8 It is a partial cross - sectional view schematic diagram of the lifting lamp module in the present invention.

[0037] Explanation of the reference numerals: 1. Base;

[0038] 2. First transmission mechanism; 21. Chassis; 22. Motor; 23. First support plate; 24. First conveyor roller; 25. Second support plate; 26. Second conveyor roller; 27. First gear; 28. Second gear; 29. Reducer;

[0039] 3. Second transmission mechanism;

[0040] 4. Detection mechanism; 41. Detection table; 42. Lighting adjustment component; 421. Second electric slide rail; 422. Guide plate; 423. Lifting lamp module; 4231. Fixed column; 4232. Electric push rod; 4233. Bulb; 4234. Support plate; 4235. Telescopic rod; 4236. Slide column; 4237. Limit column; 424. Third electric slide rail; 43. Supplementary spraying component; 431. Length adjustment module; 4311. First connecting plate; 4312. Ink guide box; 4313. Double-headed cylinder; 4314. Second connecting plate; 4315. Second connecting rod; 4316. Second limit plate; 4317. First limit plate; 4318. First connecting rod; 432. Fourth support plate; 433. Slide plate; 434. First electric slide rail; 435. Cylinder; 436. Ink cylinder; 437. Camera; 438. Fixed plate; 439. Nozzle; 44. Drying component; 441. Third support plate; 442. Electric fan; 443. Heating pipe; 444. Vent pipe; 445. Mounting bracket. Detailed implementation manners

[0041] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0042] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0043] Please refer to Figure 1-8 , the present invention provides the following technical solution: A PVC color film surface detection device, including a base 1, a detection mechanism 4 is provided on the upper side of the base 1, and a first transmission mechanism 2 and a second transmission mechanism 3 are respectively provided on both sides of the detection mechanism 4.

[0044] Please refer to Figure 2, the first transmission mechanism 2 includes a chassis 21. A first support plate 23 and a second support plate 25 are fixedly connected to the upper side of the chassis 21. A first conveying roller 24 and a second conveying roller 26 are respectively connected by bearings between the first support plate 23 and the second support plate 25. A motor 22 is fixedly connected to the upper side of the chassis 21. A speed reducer 29 is provided on one side of the motor 22 and is fixedly connected to the chassis 21. The output end of the motor 22 is fixedly connected to the input end of the speed reducer 29. The output end of the speed reducer 29 is fixedly connected to a second gear 28. A first gear 27 is fixedly connected to one end of each of the first conveying roller 24 and the second conveying roller 26. The first gear 27 is meshed with the second gear 28.

[0045] Specifically, the rotation of the output end of the motor 22 is used to control the rotation of the output end of the speed reducer 29, thereby driving the second gear 28 to rotate, and further driving the two first gears 27 to rotate. The first conveying roller 24 and the second conveying roller 26 transmit the PVC color film into the detection mechanism 4.

[0046] Please refer to Figure 3 , the detection mechanism 4 includes a detection table 41. A replenishing and spraying component 43 for replenishing and spraying the broken lines of the PVC color film is provided on the upper side of the detection table 41. A lighting adjustment component 42 for illuminating the surface of the PVC color film is provided inside the detection table 41. A drying component 44 for drying the replenished ink is provided on one side of the replenishing and spraying component 43.

[0047] Please refer to Figure 4 , the drying component 44 includes two third support plates 441 fixedly connected to the upper side of the detection table 41. An installation frame 445 is fixedly connected between the two third support plates 441. An air pipe 444 is fixedly connected inside the installation frame 445. Electric fans 442 are fixedly connected to both sides inside the air pipe 444. A number of air outlet holes are provided on the lower side of the air pipe 444. A heating pipe 443 is fixedly connected inside the installation frame 445.

[0048] Specifically, after the broken line area of the PVC color film is replenished with ink, the electric fan 442 is turned on and the heating pipe 443 is started. The air is sucked into the inside of the air pipe 444 to form an air flow. The air flow flows out through the air outlet holes and passes through the heating pipe 443. At this time, the cold air is heated into hot air and blows towards the position where the broken line of the PVC color film is replenished with ink, thereby drying the liquid ink.

[0049] Please refer to Figure 5, the supplementary spraying assembly 43 includes two fourth support plates 432 fixedly connected to the upper side of the detection table 41. A first electric slide rail 434 is fixedly connected between the two fourth support plates 432. A camera 437 is fixedly connected to the lower side of the first electric slide rail 434. A slide plate 433 is fixedly connected to the sliding end of the first electric slide rail 434. A cylinder 435 is fixedly connected to one side of the slide plate 433. An output end of the cylinder 435 is fixedly connected to a fixing plate 438. The fixing plate 438 is slidably connected to the slide plate 433. An ink cylinder 436 is fixedly connected to the upper side of the fixing plate 438. A nozzle 439 is fixedly connected to the lower side of the fixing plate 438. The ink cylinder 436 is communicated with the nozzle 439 through a pipeline. A length adjustment module 431 for adjusting the length of ink supplementary spraying is arranged below the nozzle 439.

[0050] Specifically, the camera 437 is used to take an image of the surface of the PVC color film. The nozzle 439 is used to extract the ink inside the ink cylinder 436 and then spray the ink into the length adjustment module 431. The first electric slide rail 434 is used to control the sliding of the nozzle 439, so as to perform supplementary spraying on the broken lines in different areas of the PVC color film. The extension of the output end of the cylinder 435 is used to control the downward movement of the nozzle 439, so as to approach the area of the PVC color film that needs ink replenishment for ink replenishment.

[0051] By setting the supplementary spraying assembly 43 and the drying assembly 44, when there are broken lines on the surface of the PVC color film, the first electric slide rail 434 controls the sliding of the nozzle 439, and the output end of the cylinder 435 extends to control the downward movement of the nozzle 439, so as to control the nozzle 439 to perform supplementary spraying on the broken lines in different areas of the PVC color film, effectively preventing the phenomenon that the broken lines on the surface of the PVC color film cannot be processed in time. And after the inkjet is completed, the ink replenishment area is dried in time, effectively preventing the phenomenon that the ink diffuses on the surface of the PVC color film, resulting in blurred patterns.

[0052] Embodiment 2. Since the colors of the patterns on the surface of the PVC color film are different in depth, the reflectivity of different colors of PVC color films to light is different. The reflectivity of the dark surface is low, and the ability to absorb light is strong. The reflectivity of the light surface is high, and the ability to absorb light is weak. Therefore, in order to ensure that the detection device can accurately capture the details on the surface, it is necessary to adjust the intensity of the irradiation light according to the color depth. If the intensity of the irradiation light is not appropriate, it may cause overexposure or underexposure of the detection image. Overexposure will cause the details in the light area to be lost, and underexposure will cause the details in the dark area to be unrecognizable. Therefore, the following structure is designed to solve the above technical problems.

[0053] The light adjustment component 42 includes a second electric slide rail 421 fixedly connected to the inside of the detection table 41, the sliding end of the second electric slide rail 421 is fixedly connected to a guide plate 422, a plurality of guide grooves are provided inside the guide plate 422, a third electric slide rail 424 is fixedly connected to one side of the guide plate 422, and a lifting lamp module 423 is provided at the sliding end of the third electric slide rail 424.

[0054] Specifically, the sliding of the sliding end of the second electric slide rail 421 is used to control the sliding of the lifting lamp module 423, so as to illuminate each area on the surface of the PVC color film.

[0055] The lifting lamp module 423 includes an electric push rod 4232 fixedly connected to the sliding end of the third electric slide rail 424, the output end of the electric push rod 4232 is fixedly connected to the first magnetic block, a fixed column 4231 is provided inside the guide groove, the lower side of the fixed column 4231 is fixedly connected to the second magnetic block, one side of the fixed column 4231 is fixedly connected to the light bulb 4233, the lower side of the fixed column 4231 is fixedly connected to the support plate 4234, the lower side of the support plate 4234 is fixedly connected to the telescopic rod 4235, the lower side of the telescopic rod 4235 is fixedly connected to the sliding column 4236, a limiting column 4237 is provided on the outer side of the sliding column 4236, the interior of the limiting column 4237 is a conical cavity, the upper part of the conical cavity is interference fit with the sliding column 4236, and the lower part of the conical cavity is clearance fit with the sliding column 4236.

[0056] Specifically, the extension and retraction of the output end of the electric push rod 4232 is used to control the first magnetic block to move up and down. When the light bulb 4233 needs to be close to the PVC color film, the output end of the electric push rod 4232 extends to control the second magnetic block to move upward. The first magnetic block and the second magnetic block are not powered and are in a closed state. The first magnetic block supports the second magnetic block to move the fixed column 4231 upward, thereby driving the light bulb 4233 to move upward. Due to the interference fit between the upper part of the conical cavity and the sliding column 4236, the sliding column 4236 is stuck on the upper part of the inner wall of the conical cavity. The friction between the sliding column 4236 and the inner wall of the conical cavity is greater than the gravity of the sliding column 4236. When the electric push rod 4232 slides away, the sliding column 4236 will not fall down due to gravity.

[0057] When the light bulb needs to be away from the PVC color film, the first magnetic block and the second magnetic block are powered on and are in the open state, the first magnetic block and the second magnetic block attract each other, and the output end of the electric push rod 4232 is completely retracted. Since the magnetic attraction force of the first magnetic block and the second magnetic block is greater than the friction force between the sliding column 4236 and the inner wall of the conical cavity, the first magnetic block pulls the second magnetic block to move downward, thereby driving the sliding column 4236 to slide downward, and then driving the light bulb 4233 to move downward. When the electric push rod 4232 needs to slide away, the first magnetic block and the second magnetic block are powered off.

[0058] The sliding of the sliding end of the third electric slide rail 424 is used to control the electric push rod 4232 to move, so as to reach the position of each lifting lamp module 423 and control each light bulb 4233 to move up or down.

[0059] The camera 437 is provided with a judgment module and a database inside. The database is provided with identification photos of different colors of each area of the PVC color film and identification photos of different lengths of cracks on the surface of the PVC color film. The camera 437 first takes an image of the surface of the PVC color film, and compares it with the identification photos of different colors of each area of the PVC color film in the internal database. Then, the color of each area of the PVC color film is identified, and based on the obtained photos of the PVC color film surface, the colors of the photographed areas on the surface of the PVC color film are divided into four color distribution situations: all dark and all light, light front and dark back, and dark front and light back.

[0060] When the camera 437 determines that the color of the shooting area on the surface of the PVC color film is all dark, the sliding of the sliding end of the third electric slide rail 424 is used to control the movement of the electric push rod 4232, so as to reach the position of each lifting light module 423 in turn. Every time it reaches the position of one of the lifting light modules 423, the output end of the electric push rod 4232 extends to control the second magnetic block to move upward. The first magnetic block and the second magnetic block are powered off and are in a closed state. The first magnetic block supports the second magnetic block to move the fixed column 4231 upward, thereby driving the bulb 4233 to move upward. At this time, the dark area on the surface of the PVC color film is closely illuminated by the bulb 4233, the light intensity is increased, and the dark lines on the surface of the PVC color film can be seen more clearly, which effectively prevents the dark lines from being underexposed, making the details of the dark area unrecognizable, and causing the length of the broken lines to be unable to be accurately identified.

[0061] When the camera 437 determines that the color of the shooting area on the surface of the PVC color film is all light color, the sliding end of the third electric slide rail 424 slides to control the electric push rod 4232 to move, so as to reach the position of each lifting light module 423 in turn. Every time it reaches the position of one of the lifting light modules 423, the output end of the electric push rod 4232 extends, and the first magnetic block and the second magnetic block are energized and in the open state. The first magnetic block and the second magnetic block are attracted to each other, and the output end of the electric push rod 4232 is completely retracted again, and the first magnetic block pulls the second magnetic block to move downward, thereby driving the slide column 4236 to slide downward, and then driving the bulb 4233 to move downward. At this time, the dark area on the surface of the PVC color film is away from the irradiation of the bulb 4233, and the light intensity is reduced, so that the light-colored lines on the surface of the PVC color film can be seen more clearly, which effectively prevents the light-colored lines from being overexposed, causing the details of the light-colored area to be lost, and resulting in the phenomenon that the length of the broken lines cannot be accurately identified.

[0062] When the camera 437 determines that the color of the photographed area on the surface of the PVC color film is light in the front and dark in the back, the sliding end of the third electric slide rail 424 slides to control the electric push rod 4232 to move, so as to reach the position of each lifting lamp module 423 in turn. The first magnetic attracting block and the second magnetic attracting block are electrified, and the output end of the electric push rod 4232 retracts to control each bulb 4233 to move downward. At this time, each bulb 4233 on the front of the PVC color film moves away from the PVC color film until the sliding end of the third electric slide rail 424 slides to half of the stroke, and the first magnetic attracting block and the second magnetic attracting block are powered off. Every time the electric push rod 4232 reaches the position of each lifting lamp module 423, the output end of the electric push rod 4232 extends to control each bulb 4233 to move upward until the sliding end of the third electric slide rail 424 slides to the end of all strokes. At this time, each bulb 4233 on the back of the PVC color film approaches the PVC color film.

[0063] When the camera 437 determines that the color of the photographed area on the surface of the PVC color film is dark in the front and light in the back, the sliding end of the third electric slide rail 424 slides to control the electric push rod 4232 to move, so as to reach the position of each lifting lamp module 423 in turn. The first magnetic attracting block and the second magnetic attracting block are powered off, and the output end of the electric push rod 4232 extends to control each bulb 4233 to move upward. At this time, each bulb 4233 on the front of the PVC color film approaches the PVC color film until the sliding end of the third electric slide rail 424 slides to half of the stroke, and the first magnetic attracting block and the second magnetic attracting block are electrified. Every time the electric push rod 4232 reaches the position of each lifting lamp module 423, the output end of the electric push rod 4232 retracts to control each bulb 4233 to move downward until the sliding end of the third electric slide rail 424 slides to the end of all strokes. At this time, each bulb 4233 on the front of the PVC color film moves away from the PVC color film.

[0064] The camera 437 takes an image of the surface of the PVC color film to identify the distributed color of each area on the surface of the PVC color film. The lighting adjustment component 42 continuously moves to illuminate the surface of the PVC color film, and automatically adjusts the lighting intensity of each area according to the color distributed in each area, preventing the phenomenon that when there are uneven depths in multiple areas on the surface of the PVC color film, the light intensity cannot be freely adjusted by area, avoiding overexposure of light-colored patterns and loss of details in light-colored areas, and underexposure of dark-colored patterns and inability to identify details in dark-colored areas, resulting in inaccurate identification of the length of broken lines. It achieves the effect of high accuracy in identifying the length of broken lines on the surface of the PVC color film.

[0065] Example 3. Currently, the surface inspection of existing PVC color films is usually carried out using a camera 437. When a broken line is detected, an inkjet head 439 is used for ink supplementary spraying. Since the lengths of the broken lines are inconsistent, when performing supplementary spraying, too much ink will be sprayed onto the already sprayed lines, resulting in inconsistent thickness of the lines on the subsequent PVC color film surface. The inconsistent line thickness will make the visual effect of the PVC color film uneven, affecting the aesthetics of the product, and the lines with inconsistent thickness may cause a reduction in the strength and toughness of the material. During use, the thinner areas may be more prone to scratches, cracks or breakages, affecting the durability of the product. Therefore, the following structure is designed to solve the above technical problems.

[0066] The length adjustment module 431 includes an ink guide cartridge 4312 fixedly connected to the lower side of the inkjet head 439. The output end of the inkjet head 439 penetrates through the ink guide cartridge 4312. One side of the ink guide cartridge 4312 is fixedly connected with a double-headed cylinder 4313. The two output ends of the double-headed cylinder 4313 are respectively fixedly connected with a first connecting plate 4311 and a second connecting plate 4314. The other end of the first connecting plate 4311 is fixedly connected with a first connecting rod 4318. One end of the second connecting plate 4314 is fixedly connected with a second connecting rod 4315. The other ends of the first connecting rod 4318 and the second connecting plate 4314 both penetrate through the ink guide cartridge 4312. The other end of the first connecting rod 4318 is fixedly connected with a first limiting plate 4317. The other end of the second connecting rod 4315 is fixedly connected with a second limiting plate 4316. Both the second limiting plate 4316 and the first limiting plate 4317 are slidably connected to the inside of the ink guide cartridge 4312.

[0067] Specifically, the ink ejected by the inkjet head 439 will enter the inside of the ink guide cartridge 4312. The telescoping of the two output ends of the double-headed cylinder 4313 is used to control the first limiting plate 4317 and the second limiting plate 4316 to approach or move away from each other, thereby adjusting the length that needs to be supplemented for spraying the broken line. While the first limiting plate 4317 and the second limiting plate 4316 are moving, they can also scrape off the solidified ink on the inner wall of the ink guide cartridge 4312 to prevent the protruding solidified ink from affecting the range of the ink ejected by the inkjet head 439.

[0068] After the light intensity of the bulb 4233 is adjusted, the camera 437 takes a picture of the PVC color film surface, compares it with the recognition photos of broken lines with different lengths on the PVC color film surface in the internal database, then identifies the length of each broken line on the PVC color film surface, and according to the obtained photos of the PVC color film surface, divides the lengths of the broken lines photographed on the PVC color film surface into two supplementary spraying length ranges: long broken lines and short broken lines.

[0069] When the camera 437 determines that the length of the broken lines captured on the surface of the PVC color film is a long broken line, the output end of the ink guide cartridge 4312 fully extends. At this time, the first limit plate 4317 and the second limit plate 4316 move away from each other, and the spraying range of the nozzle 439 increases, enabling the long broken line area to be filled with supplementary spraying at one time, preventing the nozzle 439 from performing supplementary spraying on a large range of broken lines multiple times and reducing the supplementary spraying efficiency.

[0070] When the camera 437 determines that the length of the broken lines captured on the surface of the PVC color film is a short broken line, the output end of the ink guide cartridge 4312 retracts to half of its stroke. At this time, the first limit plate 4317 and the second limit plate 4316 move closer to each other, and the spraying range of the nozzle 439 decreases, enabling the short broken line area to be filled with supplementary spraying in a small range, preventing the spraying range of the nozzle 439 from being too large, and preventing excess ink from being sprayed onto the already sprayed lines, thereby causing inconsistent thickness of the lines on the subsequent PVC color film surface.

[0071] After the light intensity of the bulb 4233 is adjusted, the camera 437 captures an image of the surface of the PVC color film, identifies the length of the broken lines on the surface of the PVC color film, and the supplementary spraying assembly 43 adjusts the appropriate spraying length according to the length of the broken lines and performs supplementary spraying on the broken line area, effectively preventing too much ink from being sprayed onto the already sprayed lines, thereby avoiding the occurrence of inconsistent thickness of the lines on the subsequent PVC color film surface and achieving the effect of automatically adjusting the supplementary spraying length.

[0072] Embodiment 4, a detection method for a PVC color film surface detection device, using the above PVC color film surface detection device, includes the following steps:

[0073] S1: The first transmission mechanism 2 transports the PVC color film into the detection mechanism 4.

[0074] S2: The camera 437 captures an image of the surface of the PVC color film and first identifies the distribution color of each area on the surface of the PVC color film.

[0075] The more specific steps of S2 are as follows: S21: The camera 437 is internally provided with a judgment module and a database. The database internally stores the identification photos of different colors of each area of the PVC color film and the identification photos of broken lines of different lengths on the surface of the PVC color film. The camera 437 first captures an image of the surface of the PVC color film and compares it with the identification photos of different colors of each area of the PVC color film in the internal database, then identifies the color of each area of the PVC color film, and according to the obtained captured photo of the PVC color film surface, divides the color of the captured area on the PVC color film surface into four color distribution situations: all dark, all light, light in the front and dark in the back, and dark in the front and light in the back.

[0076] S3: The light adjustment component 42 continuously moves to illuminate the surface of the PVC color film, and automatically adjusts the light intensity of each area according to the color distribution of each area.

[0077] The more specific step of S3 is, S31: when the camera 437 determines that the color of the shooting area on the surface of the PVC color film is all dark, the sliding of the sliding end of the third electric slide rail 424 is used to control the movement of the electric push rod 4232, so as to reach the position of each lifting light module 423 in turn. Every time the position of one of the lifting light modules 423 is reached, the output end of the electric push rod 4232 extends to control the second magnetic block to move upward, the first magnetic block and the second magnetic block are powered off and in a closed state, the first magnetic block supports the second magnetic block, so that the fixed column 4231 moves upward, thereby driving the light bulb 4233 to move upward. At this time, the dark area on the surface of the PVC color film is closely illuminated by the light bulb 4233.

[0078] S32: When the camera 437 determines that the color of the shooting area on the surface of the PVC color film is all light color, the sliding end of the third electric slide rail 424 slides to control the electric push rod 4232 to move, so as to reach the position of each lifting light module 423 in turn. Every time the position of one of the lifting light modules 423 is reached, the output end of the electric push rod 4232 extends out, and the first magnetic block and the second magnetic block are energized and in the open state. The first magnetic block and the second magnetic block are attracted to each other, and the output end of the electric push rod 4232 is completely retracted again, and the first magnetic block pulls the second magnetic block to move downward, thereby driving the sliding column 4236 to slide downward, and then driving the light bulb 4233 to move downward. At this time, the dark area on the surface of the PVC color film is away from the light bulb 4233.

[0079] S33: When the camera 437 determines that the color of the shooting area on the surface of the PVC color film is light in the front and dark in the back, the sliding end of the third electric slide rail 424 slides to control the electric push rod 4232 to move, so as to reach the position of each lifting lamp module 423 in turn, the first magnetic block and the second magnetic block are energized, and the output end of the electric push rod 4232 retracts to control each bulb 4233 to move downward. At this time, each bulb 4233 in the front of the PVC color film is away from the PVC color film, until the sliding end of the third electric slide rail 424 slides to half of the stroke, the first magnetic block and the second magnetic block are powered off, and each time the electric push rod 4232 reaches the position of a lifting lamp module 423, the output end of the electric push rod 4232 extends to control each bulb 4233 to move upward, until the sliding end of the third electric slide rail 424 slides all the strokes, at which time each bulb 4233 in the back of the PVC color film is close to the PVC color film.

[0080] S34: When the camera 437 determines that the color of the shooting area on the surface of the PVC color film is darker in the front and lighter in the back, the sliding end of the third electric slide rail 424 slides to control the movement of the electric push rod 4232, so as to reach the position of each lifting lamp module 423 in turn. The first magnetic block and the second magnetic block are powered off, and the output end of the electric push rod 4232 extends to control each bulb 4233 to move upward. At this time, each bulb 4233 in the front of the PVC color film approaches the PVC color film until the sliding end of the third electric slide rail 424 slides to half of the stroke. The first magnetic block and the second magnetic block are powered on. Every time the electric push rod 4232 reaches the position of a lifting lamp module 423, the output end of the electric push rod 4232 retracts to control each bulb 4233 to move downward until the sliding end of the third electric slide rail 424 slides to the end of all strokes. At this time, each bulb 4233 in the front of the PVC color film is far away from the PVC color film.

[0081] S4: During the illumination of the lighting adjustment component 42, the camera 437 takes a picture of the surface of the PVC color film and identifies the length of the broken lines on the surface of the PVC color film.

[0082] The more specific steps of S4 are as follows: S41: After the light intensity of the bulb 4233 is adjusted, the camera 437 takes a picture of the surface of the PVC color film, compares it with the identification photos of broken lines with different lengths on the surface of the PVC color film in the internal database, then identifies the length of each broken line on the PVC color film, and according to the obtained photos of the surface of the PVC color film taken, divides the lengths of the broken lines taken on the surface of the PVC color film into two supplementary spraying length ranges, namely long broken lines and short broken lines.

[0083] S5: The supplementary spraying component 43 adjusts the appropriate spraying length according to the length of the broken lines and performs supplementary spraying on the broken line area.

[0084] The more specific steps of S5 are as follows: S51: When the camera 437 determines that the length of the broken line taken on the surface of the PVC color film is a long broken line, the output end of the ink guide box 4312 fully extends. At this time, the first limit plate 4317 and the second limit plate 4316 move away from each other, and the spraying range of the nozzle 439 increases, so that the long broken line area can be filled by supplementary spraying at one time.

[0085] S52: When the camera 437 determines that the length of the broken line taken on the surface of the PVC color film is a short broken line, the output end of the ink guide box 4312 retracts to half of the stroke. At this time, the first limit plate 4317 and the second limit plate 4316 approach each other, and the spraying range of the nozzle 439 decreases, so that the short broken line area can be filled by supplementary spraying in a small range.

[0086] S6: The drying component 44 dries the supplementary spraying area, and the second transmission mechanism 3 transmits the PVC color film after the detection from inside the detection mechanism 4.

[0087] Inspired by the above-described ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A surface detection device for PVC color film, characterized in that: It includes a base (1), a detection mechanism (4) is provided on the upper side of the base (1), and a first transmission mechanism (2) and a second transmission mechanism (3) are respectively provided on both sides of the detection mechanism (4); The detection mechanism (4) includes a detection table (41), a replenishing spraying component (43) for replenishing spraying of PVC color film fracture lines is provided on the upper side of the detection table (41), a lighting adjustment component (42) for illuminating the surface of the PVC color film is provided inside the detection table (41), and a drying component (44) for drying the replenished ink is provided on one side of the replenishing spraying component (43); The replenishing spraying component (43) includes two fourth support plates (432) fixedly connected to the upper side of the detection table (41), a first electric slide rail (434) is fixedly connected in the middle of the two fourth support plates (432), a camera (437) is fixedly connected to the lower side of the first electric slide rail (434), a slide plate (433) is fixedly connected to the sliding end of the first electric slide rail (434), a cylinder (435) is fixedly connected to one side of the slide plate (433), a fixing plate (438) is fixedly connected to the output end of the cylinder (435), the fixing plate (438) is slidably connected to the slide plate (433), an ink cylinder (436) is fixedly connected to the upper side of the fixing plate (438), a nozzle (439) is fixedly connected to the lower side of the fixing plate (438), the ink cylinder (436) is communicated with the nozzle (439) through a pipeline, and a length adjustment module (431) for adjusting the length of ink replenishing spraying is provided below the nozzle (439); The lighting adjustment component (42) includes a second electric slide rail (421) fixedly connected to the inside of the detection table (41), a guide plate (422) is fixedly connected to the sliding end of the second electric slide rail (421), a plurality of guide chutes are provided inside the guide plate (422), a third electric slide rail (424) is fixedly connected to one side of the guide plate (422), and a lifting lamp module (423) is provided at the sliding end of the third electric slide rail (424); The lifting lamp module (423) includes an electric push rod (4232) fixedly connected to the sliding end of the third electric slide rail (424), a first magnetic attraction block is fixedly connected to the output end of the electric push rod (4232), a fixed column (4231) is provided inside the guide chute, a second magnetic attraction block is fixedly connected to the lower side of the fixed column (4231), a light bulb (4233) is fixedly connected to one side of the fixed column (4231), and a support plate (4234) is fixedly connected to the lower side of the fixed column (4231); A telescopic rod (4235) is fixedly connected to the lower side of the support plate (4234), a sliding column (4236) is fixedly connected to the lower side of the telescopic rod (4235), a limiting column (4237) is provided on the outer side of the sliding column (4236), the inside of the limiting column (4237) is a conical cavity, the upper part of the conical cavity is in interference fit with the sliding column (4236), and the lower part of the conical cavity is in clearance fit with the sliding column (4236); Inside the camera (437), there is a judgment module and a database. Inside the database, there are recognition photos of different colors in each area of the PVC color film. The camera (437) first takes an image of the surface of the PVC color film and compares it with the recognition photos of different colors in each area of the PVC color film in the internal database. Then, it recognizes the color of each area of the PVC color film. According to the taken photo of the surface of the PVC color film, the colors of the photographed areas on the surface of the PVC color film are divided into four color distribution situations: all dark, all light, light in the front and dark in the back, and dark in the front and light in the back. The lighting adjustment component (42) continuously moves to illuminate the surface of the PVC color film and automatically adjusts the lighting intensity of each area according to the color distributed in each area.

2. The surface detection device for a PVC color film according to claim 1, characterized in that: The first transmission mechanism (2) includes a chassis (21). On the upper side of the chassis (21), a first support plate (23) and a second support plate (25) are fixedly connected. Between the first support plate (23) and the second support plate (25), a first conveying roller (24) and a second conveying roller (26) are respectively connected by bearings. On the upper side of the chassis (21), a motor (22) is fixedly connected. On one side of the motor (22), there is a speed reducer (29) and the speed reducer (29) is fixedly connected to the chassis (21).

3. The surface detection device for a PVC color film according to claim 2, wherein: The output end of the motor (22) is fixedly connected to the input end of the speed reducer (29). The output end of the speed reducer (29) is fixedly connected to a second gear (28). One end of each of the first conveying roller (24) and the second conveying roller (26) is fixedly connected to a first gear (27). The first gear (27) is meshed with the second gear (28).

4. The surface detection device for a PVC color film according to claim 1, wherein: The drying component (44) includes two third support plates (441) fixedly connected to the upper side of the detection table (41). In the middle of the two third support plates (441), an installation frame (445) is fixedly connected. Inside the installation frame (445), an air duct (444) is fixedly connected. On both sides inside the air duct (444), electric fans (442) are fixedly connected. There are a number of air outlet holes on the lower side of the air duct (444). Inside the installation frame (445), a heating pipe (443) is fixedly connected.

5. The surface detection device for a PVC color film according to claim 1, characterized in that: The length adjustment module (431) includes an ink guide box (4312) fixedly connected to the lower side of the nozzle (439). The output end of the nozzle (439) penetrates through the ink guide box (4312). On one side of the ink guide box (4312), a double-headed cylinder (4313) is fixedly connected. The two output ends of the double-headed cylinder (4313) are respectively fixedly connected to a first connecting plate (4311) and a second connecting plate (4314). The other end of the first connecting plate (4311) is fixedly connected to a first connecting rod (4318).

6. The surface detection device for a PVC color film according to claim 5, characterized in that: One end of the second connecting plate (4314) is fixedly connected to a second connecting rod (4315). The other ends of the first connecting rod (4318) and the second connecting plate (4314) both penetrate through the ink guide cartridge (4312). The other end of the first connecting rod (4318) is fixedly connected to a first limiting plate (4317). The other end of the second connecting rod (4315) is fixedly connected to a second limiting plate (4316). The second limiting plate (4316) and the first limiting plate (4317) are both slidably connected to the interior of the ink guide cartridge (4312).

7. A detection method for a surface detection device of a PVC color film, using a surface detection device of a PVC color film as described in any one of claims 1-6, characterized in that, Including the following steps: S1: The first transmission mechanism (2) transmits the PVC color film into the detection mechanism (4); S2: The camera (437) takes an image of the surface of the PVC color film and first identifies the distribution color of each area on the surface of the PVC color film; S3: The light adjustment component (42) continuously moves to illuminate the surface of the PVC color film and automatically adjusts the light illumination intensity of each area according to the color distribution of each area; S4: During the illumination of the light adjustment component (42), the camera (437) takes an image of the surface of the PVC color film and identifies the length of the broken lines on the surface of the PVC color film; S5: The supplementary spraying component (43) adjusts an appropriate spraying length according to the length of the broken lines and performs supplementary spraying on the broken line area; S6: The drying component (44) then dries the supplementary spraying area, and the second transmission mechanism (3) transmits the PVC color film after the detection from inside the detection mechanism (4).

Images