A defect detection device and its detection method for automotive lamp production

Abstract

The present invention is applicable to the technical field of automotive lamp detection, and provides a defect detection device and a detection method for automotive lamp production, including a trace display component and a compression component; the trace display component includes a long plate, a short plate, a telescopic cylinder, a telescopic strip, a spray pipe, a spray head, a guiding member, and a movable member; the compression component includes a baffle plate, a first compression cylinder, a first compression strip, a first compression plate, a second compression cylinder, a second compression strip, a second compression plate, a third compression plate, and a self-adjusting member; by synchronously displacing the spray pipe and the spray head, the spray head can spray water droplets onto the surface of the transparent lamp cover, so that the water droplets slide along the surface of the transparent lamp cover. When the water droplets pass through a relatively shallow scratch on the surface of the transparent lamp cover, it will cause the water droplets to gather or flow irregularly. When detected again by the vision sensor, the state of the water droplets can be used to determine whether there is a scratch; the accuracy of scratch detection is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive lamp detection, and more specifically, it relates to a defect detection device and a detection method for automotive lamp production. Background Art

[0002] Automotive lamps refer to various lamps installed on automobiles for lighting and signal transmission, including headlamps, tail lamps, turn signals, fog lamps, brake lamps, etc.; they play a crucial role during vehicle driving.

[0003] In the prior art, the production process of automotive lamps is a complex and delicate technological process, involving multiple steps and technologies such as design and development, mold manufacturing, material preparation, injection molding, optical element manufacturing, assembly, testing and debugging, quality control, etc.; before assembling automotive lamps, it is also necessary to separately detect scratches on the transparent lamp covers and black bases of automotive lamps to ensure the subsequent assembly efficiency of automotive lamps.

[0004] Before detecting the transparent lamp cover of a vehicle, it needs to go through a series of processing procedures such as deburring and coating. However, the coating will cover the scratches on the surface of the transparent lamp cover. If the scratches on the surface of the transparent lamp cover are relatively shallow, it will be difficult to detect the scratches after coating, thereby reducing the accuracy of scratch detection and being unfavorable for the detection efficiency of the transparent lamp cover.

[0005] At the same time, during the process of detecting the corners of the transparent lamp cover of a vehicle, due to the multiple irregular surfaces at the corners of the transparent lamp cover, when the detection light shines down, the detection light will refract or reflect at the corners. The refracted and reflected rays will cause a relatively high intensity of light irradiation. The relatively high-intensity light will affect the detection accuracy of the sensor, and further affect the visibility of scratches, further reducing the accuracy of scratch detection; for this reason, a defect detection device and a detection method for automotive lamp production are proposed to improve the existing problems. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a defect detection device and a detection method for automotive lamp production.

[0007] To achieve the above object, the present invention provides the following technical solution: A defect detection device for automobile lamp production, comprising a detection component and a mark display component; wherein, the detection component includes a support base, a protective fence arranged on the top of the support base, a robotic arm arranged in the middle of the protective fence, a fixed disk arranged at the execution end of the robotic arm, lamp tubes evenly arranged on the side of the fixed disk away from the robotic arm, and a vision sensor arranged in the middle of the lamp tubes; the mark display component is arranged on one side of the robotic arm, and includes long plates symmetrically arranged in the axial direction above the protective fence, short plates symmetrically arranged in the radial direction between the long plates, telescopic cylinders symmetrically arranged in the axial direction on one side of one of the short plates, telescopic bars arranged at the telescopic ends of the telescopic cylinders, spray pipes evenly arranged between the telescopic bars, spray heads evenly arranged on the outer wall of the spray pipes, guiding members arranged on the side of the telescopic bars away from the spray pipes, and movable members arranged below the spray pipes.

[0008] The present invention is further arranged as follows: A compression component is further arranged on the movable member; the compression component includes a baffle, a first compression cylinder arranged on one side of the baffle, a first compression bar arranged at the telescopic end of the first compression cylinder, a first compression plate arranged at the end of the first compression bar away from the first compression cylinder, a second compression cylinder arranged on one side of the first compression plate, a second compression bar arranged at the telescopic end of the second compression cylinder, a second compression plate arranged at the end of the second compression bar away from the second compression cylinder, a third compression plate arranged on one side of the second compression plate, and a self-adjusting member arranged at the end of the third compression plate away from the second compression plate.

[0009] The present invention is further arranged as follows: Guide grooves are formed on the side walls of the long plates, the two guide grooves are arranged oppositely, the bottom of the short plate is connected to the top of the protective fence, and the telescopic end of the telescopic cylinder penetrates through the side wall of one of the short plates and is connected to the telescopic bar.

[0010] The present invention is further arranged as follows: The guiding member includes guiding plates symmetrically arranged in the radial direction on the top of the telescopic bar, and guiding rollers rotatably connected to the sides of the guiding plates away from the telescopic bar; the guiding rollers can slide in the corresponding guide grooves.

[0011] The present invention is further configured as follows: The movable member includes a fixed plate, a radial motor disposed on the top of the fixed plate, a radial shaft disposed at the output end of the radial motor, a radial worm disposed on the radial shaft, first fixed slide rails symmetrically disposed in the radial direction on the top of the fixed plate, a first slide plate disposed on one side of the first fixed slide rails, a first arc-shaped track disposed between the first slide plates, an axial motor disposed on one side of the first arc-shaped track, an axial shaft disposed at the output end of the axial motor, an axial worm disposed on the axial shaft, second fixed slide rails symmetrically disposed in the axial direction on the top of the fixed plate, a second slide plate disposed on one side of the second fixed slide rails, a second arc-shaped track disposed between the second slide plates, and a movable plate disposed above the first arc-shaped track; The fixed plate is located on the top of the support base, the radial shaft and the axial shaft are both connected to the top of the fixed plate through bearing seats, a first chute is formed on the side wall of the first fixed slide rail close to the first slide plate, the two first chutes are distributed oppositely, the first slide plate is slidably engaged in the corresponding first chute, first tooth blocks are uniformly formed at the bottom of the first slide plate, and the first tooth blocks are in meshing transmission with the corresponding radial worms.

[0012] The present invention is further configured as follows: A second chute is formed on the side wall of the second fixed slide rail close to the second slide plate, the two second chutes are distributed oppositely, the second slide plate is slidably engaged in the corresponding second chute, second tooth blocks are uniformly formed at the bottom of the second slide plate, and the second tooth blocks are in meshing transmission with the corresponding axial worms. The first arc-shaped track and the second arc-shaped track are distributed in a cross shape, and the first arc-shaped track is located above the second arc-shaped track; A first rail block is disposed at the bottom of the movable plate, a second rail block is disposed on the side of the first rail block away from the movable plate, the first rail block is slidably engaged in the first arc-shaped track, the second rail block is slidably engaged in the second arc-shaped track, and a clamping member is further disposed on the top of the movable plate.

[0013] The present invention is further configured as follows: The compression assembly is located on the movable plate, the bottom of the baffle is connected to the top of the movable plate, the outer walls of the first compression cylinder and the second compression cylinder are both connected to the side wall of the movable plate, the second compression cylinder is obliquely distributed, and the baffle, the first compression plate, the second compression plate and the third compression plate surround to form a square.

[0014] The present invention is further configured as follows: The self-adjusting member includes an adjusting plate, a spring disposed in the adjusting plate, and a displacement block disposed at one end of the spring; One end of the adjusting plate is connected to the side wall of the movable plate, a displacement groove is formed at the top of the adjusting plate, the end of the spring away from the displacement block is connected to the inner wall of the displacement groove, and the end of the displacement block away from the spring is connected to the end of the third compression plate away from the second compression plate.

[0015] The present invention is further configured such that: a control program is built into the lamp tube, the control program is electrically connected to a vision sensor, and the lamp tube changes its color according to the settings of the control program. The colors of the lamp tube include: red, white, and blue.

[0016] The control program includes an input module, a control module, and a characterization module.

[0017] The input module inputs vehicle lamp values manually, including length and thickness, and inputs different instructions to the control module according to different thickness value ranges corresponding to the length value.

[0018] The control module controls the lamp tube to change its color, and the vision sensor feeds back the recognized length to the control module in real time.

[0019] The characterization module is used to receive the picture signal transmitted by the vision sensor.

[0020] The input module sends different instructions to the control module according to different input ranges, and its thickness range is:

[0021] When the thickness value corresponding to the length value is in the range of 15 - 25 mm (excluding 25 mm), input 0 to the control module.

[0022] When the thickness value corresponding to the length value is in the range of 25 - 35 mm (excluding 35 mm), input 1 to the control module.

[0023] When the thickness value corresponding to the length value is in the range of 35 - 40 mm, input 2 to the control module.

[0024] When the control module receives instruction 0, it controls the color of the lamp tube to change to blue. When the control module receives instruction 1, it controls the color of the lamp tube to change to white. When the control module receives instruction 2, it controls the color of the lamp tube to change to red.

[0025] A method for detecting defects in the production of automotive lamps, using the device for detecting defects in the production of automotive lamps as described above, includes the following steps:

[0026] S1. When detecting a transparent lamp cover, the transparent lamp cover can be first installed on the movable part, and then the robotic arm is activated to bring the lamp tube and the vision sensor close to the surface of the transparent lamp cover, so as to detect the scratch defects on the surface of the transparent lamp cover.

[0027] S2. If the shallow scratches on the surface of the transparent headlight cover are affected by the coating process in the previous step, making it difficult to detect the shallow scratches, the telescopic cylinder can be activated. Its telescopic end pushes the telescopic strip close to the upper part of the transparent headlight cover, causing the spray pipe and the spray head to move synchronously. At this time, the spray head can spray water droplets onto the surface of the transparent headlight cover, making the water droplets slide along the surface of the transparent headlight cover. When the water droplets pass over the shallow scratches on the surface of the transparent headlight cover, it will cause the water droplets to gather or flow irregularly. When detecting again through the vision sensor, the state of the water droplets can be used to determine whether there are scratches.

[0028] S3. During the operation of S2, the moving part is activated. On the one hand, the transparent headlight cover can be clamped through the mechanism on the moving part. On the other hand, it can drive the transparent headlight cover to swing in all directions, making the water droplets slide repeatedly on the surface of the transparent headlight cover, and conduct contact detection for scratches in different directions, so as to ensure the accuracy of scratch detection.

[0029] S4. When the robotic arm drives the lamp tube and the vision sensor close to the corner of the transparent headlight cover, at this time, the detection light will refract or reflect at the corner. The refracted and reflected rays will cause a relatively high intensity of light irradiation. The relatively high-intensity light will affect the detection accuracy of the sensor and the visibility of scratches. Therefore, on the one hand, the first compression cylinder is activated, and its telescopic end pushes the first compression plate close to the transparent headlight cover through the first compression strip. On the other hand, the second compression cylinder is activated, and its telescopic end pushes the second compression plate close to the transparent headlight cover through the second compression strip. During this process, the second compression plate will also squeeze the third compression plate. Thus, the baffle, the first compression plate, the second compression plate, and the third compression plate surround and block the periphery of the transparent headlight cover, thereby reducing the interference of external light, internal refracted or reflected light.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] (1) By pushing the telescopic strip close to the upper part of the transparent headlight cover through the telescopic cylinder, the spray pipe and the spray head move synchronously. The spray head can spray water droplets onto the surface of the transparent headlight cover, making the water droplets slide along the surface of the transparent headlight cover. When the water droplets pass over the shallow scratches on the surface of the transparent headlight cover, it will cause the water droplets to gather or flow irregularly. When detecting again through the vision sensor, the state of the water droplets can be used to determine whether there are scratches; the accuracy of scratch detection is improved, and thus the detection efficiency of the transparent headlight cover is improved.

[0032] (2) Through the design of the moving part, on the one hand, the transparent headlight cover can be clamped through the mechanism on the moving part. On the other hand, it can drive the transparent headlight cover to swing in all directions, making the water droplets slide repeatedly on the surface of the transparent headlight cover, and conduct contact detection for scratches in different directions, so as to ensure the accuracy of scratch detection.

[0033] (3) By starting the first compression cylinder, its telescopic end pushes the first compression plate close to the transparent lamp cover through the first compression strip; starting the second compression cylinder, its telescopic end pushes the second compression plate close to the transparent lamp cover through the second compression strip. During this process, the second compression plate also squeezes the third compression plate; thus, the baffle, the first compression plate, the second compression plate, and the third compression plate surround and block the periphery of the transparent lamp cover, which can reduce the interference of external light, internal refracted or reflected light, thereby improving the visibility of scratches, and further improving the accuracy of scratch detection. Description of the Drawings

[0034] Figure 1 It is a schematic diagram of the overall structure of the defect detection device for automobile lamp production according to the present invention.

[0035] Figure 2 It is a schematic diagram of the overall structure of the robotic arm in the present invention.

[0036] Figure 3 It is a schematic diagram of the overall structure of the scratch display component in the present invention.

[0037] Figure 4 It is a schematic diagram of the overall structure of the movable part in the present invention.

[0038] Figure 5 It is a schematic diagram of the overall structure of the clamping part in the present invention.

[0039] Figure 6 It is a schematic diagram of the overall structure of the fixed plate in the present invention.

[0040] Figure 7 It is an exploded view of the movable part in the present invention.

[0041] Figure 8 It is a schematic diagram of the overall structure of the movable plate, the first rail block, and the second rail block in the present invention.

[0042] Figure 9 It is a schematic diagram of the overall structure of the compression component in the present invention.

[0043] Figure 10 It is a schematic diagram of the overall structure of the self-adjusting part in the present invention.

[0044] Description of the Reference Numerals: 1, detection component; 11, support base; 12, protective fence; 13, robotic arm; 14, fixed disk; 15, lamp tube; 16, vision sensor;

[0045] 2, scratch display component; 21, long plate; 211, guide groove; 22, short plate; 23, telescopic cylinder; 24, telescopic strip; 25, spray pipe; 26, spray head; 27, guiding part; 271, guiding plate; 272, guiding roller;

[0046] 28. Movable part; 281. Fixed plate; 282. Radial motor; 2821. Radial shaft; 2822. Radial worm; 283. First fixed slide rail; 2831. First slide plate; 2832. First chute; 2833. First tooth block; 284. First arc track; 285. Axial motor; 2851. Axial shaft; 2852. Axial worm; 286. Second fixed slide rail; 2861. Second slide plate; 2862. Second chute; 2863. Second tooth block; 287. Second arc track; 288. Movable plate; 2881. First rail block; 2882. Second rail block; 289. Clamping part; 2891. Clamping cylinder; 2892. Clamping plate;

[0047] 3. Compression assembly; 31. Baffle; 32. First compression cylinder; 33. First compression strip; 34. First compression plate; 35. Second compression cylinder; 36. Second compression strip; 37. Second compression plate; 38. Third compression plate; 39. Self-adjusting part; 391. Adjusting plate; 392. Spring; 393. Displacement block; 394. Displacement groove. Detailed implementation manners

[0048] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0049] Please refer to Figures 1-10 , the present invention provides the following technical solutions:

[0050] Example 1, refer to Figures 1-10 , a defect detection device for automobile lamp production, including a detection assembly 1, a trace showing assembly 2 and a compression assembly 3; wherein, the detection assembly 1 can detect a series of defects such as scratches and air bubbles on a transparent lamp cover through light and a vision sensor 16, so as to ensure the subsequent assembly efficiency of automobile lamps.

[0051] The function of the trace showing assembly 2 is to judge whether there are shallow scratches on the surface of the transparent lamp cover by observing the slip distribution state of water droplets, thus avoiding the problem that the coating will cover the scratches on the surface of the transparent lamp cover, and if the scratches on the surface of the transparent lamp cover are shallow, it will lead to the problem that the scratches after coating are difficult to be detected, improving the accuracy of scratch detection and thus improving the detection efficiency of the transparent lamp cover.

[0052] The function of the compression component 3 is to block the light sources around the transparent lamp cover by setting baffles around the transparent lamp cover, and at the same time absorb the refracted or reflected light, so as to avoid the refraction or reflection of the detection light when it shines down at the corner. The refracted and reflected rays will cause a relatively high illumination intensity of the light, and the relatively high-intensity light will affect the detection accuracy of the sensor, thereby improving the visibility of the scratch and further improving the accuracy of scratch detection.

[0053] Refer to Figures 1-2 , specifically, the detection component 1 includes a support base 11, a guardrail 12 arranged on the top of the support base 11, a robotic arm 13 arranged in the middle of the guardrail 12, a fixed disk 14 arranged at the execution end of the robotic arm 13, a lamp tube 15 uniformly arranged on the side of the fixed disk 14 away from the robotic arm 13, and a vision sensor 16 arranged in the middle of the lamp tube 15.

[0054] Among them, when detecting the transparent lamp cover, the transparent lamp cover can be first installed on the movable part 28, and then the robotic arm 13 is activated to drive the fixed disk 14, the lamp tube 15 and the vision sensor 16 close to the surface of the transparent lamp cover, so that the scratch defects on the surface of the transparent lamp cover can be detected by the vision sensor 16.

[0055] It should be noted that the robotic arm 13 includes a base and a robotic arm; the robotic arm can rotate on the base to adjust the rotation angle, and the robotic arm can adjust the up and down position to achieve a better detection angle.

[0056] Refer to Figures 3-8 , specifically, the mark display component 2 is arranged on one side of the robotic arm 13, and it includes long plates 21 symmetrically arranged in the axial direction above the guardrail 12, short plates 22 symmetrically arranged in the radial direction between the long plates 21, telescopic cylinders 23 symmetrically arranged in the axial direction on one side of one of the short plates 22, telescopic bars 24 arranged at the telescopic ends of the telescopic cylinders 23, spray pipes 25 uniformly arranged between the telescopic bars 24, spray heads 26 uniformly arranged on the outer wall of the spray pipes 25, guide members 27 arranged on the side of the telescopic bars 24 away from the spray pipes 25, and a movable part 28 arranged below the spray pipes 25.

[0057] Among them, if the relatively shallow scratches on the surface of the transparent lamp cover are affected by the coating process in the previous step, making it difficult to detect the relatively shallow scratches, the telescopic cylinder 23 can be activated. Its telescopic end pushes the telescopic strip 24 close to the upper part of the transparent lamp cover, causing the spray pipe 25 and the spray head 26 to move synchronously. At this time, the spray head 26 can spray water droplets onto the surface of the transparent lamp cover, causing the water droplets to slide along the surface of the transparent lamp cover. When the water droplets pass through the relatively shallow scratches on the surface of the transparent lamp cover, it will cause the water droplets to gather or flow irregularly. When detected again by the vision sensor 16, the state of the water droplets can be used to determine whether there are scratches; thus, it is avoided that the coating will cover the scratches on the surface of the transparent lamp cover. If the scratches on the surface of the transparent lamp cover are relatively shallow, it will lead to the problem that the scratches after coating are difficult to detect, improving the accuracy of scratch detection and thus improving the detection efficiency of the transparent lamp cover.

[0058] At the same time, during the operation of the spray head 26, the movable part 28 is activated. On the one hand, the transparent lamp cover can be clamped through the mechanism on the movable part 28. On the other hand, it can drive the transparent lamp cover to swing in all directions, causing the water droplets to repeatedly slide on the surface of the transparent lamp cover, and performing contact detection on scratches in different directions, so as to ensure the accuracy of scratch detection.

[0059] It should be noted that the water droplets remaining on the surface of the transparent lamp cover after spraying can be wiped manually.

[0060] Refer to Figures 9-10 , specifically, the compression assembly 3 is arranged on the movable part 28, and it includes a baffle 31, a first compression cylinder 32 arranged on one side of the baffle 31, a first compression strip 33 arranged at the telescopic end of the first compression cylinder 32, a first compression plate 34 arranged at the end of the first compression strip 33 away from the first compression cylinder 32, a second compression cylinder 35 arranged on one side of the first compression plate 34, a second compression strip 36 arranged at the telescopic end of the second compression cylinder 35, a second compression plate 37 arranged at the end of the second compression strip 36 away from the second compression cylinder 35, a third compression plate 38 arranged on one side of the second compression plate 37, and a self-adjusting part 39 arranged at the end of the third compression plate 38 away from the second compression plate 37.

[0061] Among them, when the robotic arm 13 drives the lamp tube 15 and the vision sensor 16 close to the corner of the transparent car lamp cover, at this time, the detected light will be refracted or reflected at the corner. The refracted and reflected rays will cause a relatively high intensity of light irradiation. The relatively high-intensity light will affect the detection accuracy of the sensor and the visibility of scratches. Therefore, on the one hand, the first compression cylinder 32 is activated, and its telescopic end pushes the first compression plate 34 close to the transparent car lamp cover through the first compression strip 33; on the other hand, the second compression cylinder 35 is activated, and its telescopic end pushes the second compression plate 37 close to the transparent car lamp cover through the second compression strip 36. During this process, the second compression plate 37 will also squeeze the third compression plate 38; thus, the baffle 31, the first compression plate 34, the second compression plate 37, and the third compression plate 38 surround and block the periphery of the transparent car lamp cover, which can reduce the interference of external light, internal refracted or reflected light, and thus avoid the problem that when the detected light shines down, the detected light will be refracted or reflected at the corner, and the refracted and reflected rays will cause a relatively high intensity of light irradiation, and the relatively high-intensity light will affect the detection accuracy of the sensor, thereby improving the visibility of scratches and further improving the accuracy of scratch detection.

[0062] Refer to Figures 1-3 , Further, guide grooves 211 are formed on the side wall of the long plate 21. The two guide grooves 211 are arranged oppositely. The bottom of the short plate 22 is connected to the top of the guardrail 12. The telescopic end of the telescopic cylinder 23 penetrates the side wall of one of the short plates 22 and is connected to the telescopic strip 24.

[0063] Refer to Figures 1-3 , Even further, the guiding member 27 includes guiding plates 271 symmetrically arranged in the radial direction on the top of the telescopic strip 24, and guiding rollers 272 rotatably connected to the side of the guiding plate 271 away from the telescopic strip 24; the guiding rollers 272 can slide in the corresponding guide grooves 211.

[0064] Among them, when the telescopic cylinder 23 is activated, its telescopic end pushes the telescopic strip 24 close to the upper part of the transparent car lamp cover, so that the spray pipe 25 and the spray head 26 are displaced synchronously. During this process, the telescopic strip 24 will also drive the corresponding guiding plates 271 at both ends to be displaced synchronously, so that the corresponding guiding rollers 272 perform guiding sliding in the corresponding guide grooves 211, thus achieving the purpose of guiding.

[0065] Refer to Figures 4-8, Further, the movable member 28 includes a fixed plate 281, a radial motor 282 disposed on the top of the fixed plate 281, a radial shaft 2821 disposed at the output end of the radial motor 282, a radial worm 2822 disposed on the radial shaft 2821, first fixed slide rails 283 symmetrically disposed in the radial direction on the top of the fixed plate 281, a first slide plate 2831 disposed on one side of the first fixed slide rail 283, a first arc-shaped track 284 disposed between the first slide plates 2831, an axial motor 285 disposed on one side of the first arc-shaped track 284, an axial shaft 2851 disposed at the output end of the axial motor 285, an axial worm 2852 disposed on the axial shaft 2851, second fixed slide rails 286 symmetrically disposed in the axial direction on the top of the fixed plate 281, a second slide plate 2861 disposed on one side of the second fixed slide rail 286, a second arc-shaped track 287 disposed between the second slide plates 2861, and a movable plate 288 disposed above the first arc-shaped track 284; the fixed plate 281 is located on the top of the support base 11, both the radial shaft 2821 and the axial shaft 2851 are connected to the top of the fixed plate 281 through bearing seats, first chutes 2832 are formed on the side wall of the first fixed slide rail 283 close to the first slide plate 2831, the two first chutes 2832 are distributed oppositely, the first slide plate 2831 is slidably fitted in the corresponding first chute 2832, first tooth blocks 2833 are evenly formed on the bottom of the first slide plate 2831, and the first tooth blocks 2833 are in meshing transmission with the corresponding radial worms 2822.

[0066] Among them, when the radial motor 282 is started, it drives the radial shaft 2821 and the radial worm 2822 to rotate. Since the radial worm 2822 is in meshing transmission with the first tooth blocks 2833, when the radial worm 2822 rotates, it can drive the first slide plate 2831 to slide in the first chute 2832 through the first tooth blocks 2833, so that the two first slide plates 2831 drive the first arc-shaped track 284 to swing synchronously; during this process, since the first rail block 2881 is slidably fitted in the first arc-shaped track 284, when the first arc-shaped track 284 swings, it will also drive the first rail block 2881 to slide along the track opening direction of the first arc-shaped track 284, so that the movable plate 288 swings and deflects in one direction, causing the transparent lamp cover on the movable plate 288 to tilt, making the water droplets slide repeatedly on the surface of the transparent lamp cover, and performing contact detection on scratches in different directions, so as to ensure the accuracy of scratch detection.

[0067] Refer to Figures 4-8, Further, on the side wall of the second fixed slide rail 286 close to the second slide plate 2861, there are second slide grooves 2862 opened. The two second slide grooves 2862 are distributed oppositely. The second slide plate 2861 is slidably fitted in the corresponding second slide groove 2862. The bottom of the second slide plate 2861 is evenly provided with second tooth blocks 2863. The second tooth blocks 2863 are in meshing transmission with the corresponding axial worm 2852. The first arc track 284 and the second arc track 287 are distributed in a cross shape. The first arc track 284 is located above the second arc track 287; on the bottom of the movable plate 288, there is a first track block 2881. On the side of the first track block 2881 away from the movable plate 288, there is a second track block 2882. The first track block 2881 is slidably fitted in the first arc track 284. The second track block 2882 is slidably fitted in the second arc track 287. On the top of the movable plate 288, there is also a clamping member 289.

[0068] Among them, when the axial motor 285 is started, it drives the axial shaft 2851 and the axial worm 2852 to rotate. Since the axial worm 2852 is in meshing transmission with the second tooth block 2863, when the axial worm 2852 rotates, it can drive the second slide plate 2861 to slide in the second slide groove 2862 through the second tooth block 2863, so that the two second slide plates 2861 drive the second arc track 287 to swing synchronously; during this process, since the second track block 2882 is slidably fitted in the second arc track 287, when the second arc track 287 swings, it will also drive the second track block 2882 to slide along the track opening direction of the second arc track 287, so that the movable plate 288 swings and deflects in another direction, making the transparent car lamp cover on the movable plate 288 tilt, and making the water droplets slide repeatedly on the surface of the transparent car lamp cover, and performing contact detection on scratches in different directions, so as to ensure the accuracy of scratch detection.

[0069] It should be noted that the clamping member 289 includes a clamping cylinder 2891 and clamping plates 2892 symmetrically arranged at the clamping ends of the clamping cylinder 2891.

[0070] When clamping the transparent car lamp cover, first place the transparent car lamp cover in the middle of the clamping plate 2892, and then start the clamping cylinder 2891 to drive the two clamping plates 2892 to approach each other, so as to achieve the purpose of clamping.

[0071] Embodiment 2, refer to Figures 9-10 , Further, the compression assembly 3 is located on the movable plate 288. The bottom of the baffle 31 is connected to the top of the movable plate 288. The outer walls of the first compression cylinder 32 and the second compression cylinder 35 are both connected to the side wall of the movable plate 288. The second compression cylinder 35 is obliquely distributed. The baffle 31, the first compression plate 34, the second compression plate 37 and the third compression plate 38 surround to form a square.

[0072] Refer to Figures 9-10 Furthermore, the self-adjusting member 39 includes an adjusting plate 391, a spring 392 disposed within the adjusting plate 391, and a displacement block 393 disposed at one end of the spring 392; one end of the adjusting plate 391 is connected to the side wall of the movable plate 288, a displacement groove 394 is formed at the top of the adjusting plate 391, one end of the spring 392 away from the displacement block 393 is connected to the inner wall of the displacement groove 394, and one end of the displacement block 393 away from the spring 392 is connected to one end of the third compression plate 38 away from the second compression plate 37.

[0073] Wherein, during the process of the second compression plate 37 squeezing the third compression plate 38, the third compression plate 38 also squeezes the displacement block 393 and the spring 392, causing the displacement block 393 to slide within the displacement groove 394, deforming the spring 392 from its free state to a compressed state, so that the baffle 31, the first compression plate 34, the second compression plate 37, and the third compression plate 38 surround and block the periphery of the transparent lamp cover, reducing the interference of external light, internal refracted or reflected light. Thus, when the detection light shines down, the problem that the detection light will refract or reflect at the corner is avoided. The refracted and reflected rays will cause a relatively high irradiation intensity of the light, and the relatively high-intensity light will affect the detection accuracy of the sensor. Therefore, the visibility of the scratch is improved, and further the accuracy of scratch detection is improved.

[0074] Embodiment 3, through the mutual cooperation of Embodiment 1 and Embodiment 2, although the problem in the prior art that the coating will cover the scratches on the surface of the transparent lamp cover, and if the scratches on the surface of the transparent lamp cover are relatively shallow, it will be difficult to detect the scratches after coating is solved, and the problem that when the detection light shines down, the detection light will refract or reflect at the corner, and the refracted and reflected rays will cause a relatively high irradiation intensity of the light, and the relatively high-intensity light will affect the detection accuracy of the sensor is solved. However, the problem in the prior art that when the detection light irradiates a relatively thick area of the transparent lamp cover, the propagation of the light will be attenuated, resulting in difficult scratch detection is still not solved; for this reason, the following solution is now proposed:

[0075] Refer to Figures 1-10 Furthermore, the lamp tube 15 has a built-in control program, and the lamp tube 15 changes its color according to the settings of the control program. The colors of the lamp tube 15 include: red, white, and blue. The color change of the lamp tube 15 adopts RGB LED technology. With RGB LED technology, the lamp tube 15 can perform a variety of color transformations, but in this control program, only its red, white, and blue changes are performed.

[0076] The control program includes an input module, a control module, and a characterization module; the input module inputs the headlight value manually and inputs different instructions to the control module according to different value ranges; the control module controls the color change of the lamp tube 15, and the visual sensor 16 feeds back the recognized length to the control module in real time.

[0077] Its thickness range is:

[0078] When the thickness value corresponding to the length value is in the range of 15 - 25 mm (excluding 25 mm), input 0 to the control module;

[0079] When the thickness value corresponding to the length value is in the range of 25 - 35 mm (excluding 35 mm), input 1 to the control module;

[0080] When the thickness value corresponding to the length value is in the range of 35 - 40 mm, input 2 to the control module;

[0081] When the control module receives the instruction 0, it controls the color of the lamp tube 15 to turn blue. When the control module receives the instruction 1, it controls the color of the lamp tube 15 to turn white. When the control module receives the instruction 2, it controls the color of the lamp tube 15 to turn red.

[0082] It should be noted by way of example that the control module is used to input the thickness range corresponding to each length of the current headlight lamp cover, and its input mode is: the length of each section of the headlight and the thickness of the headlight corresponding to that section length, for example: starting from one end (taking the starting section of the current input headlight as length 0):

[0083] Length: 0 - 15 cm, Thickness: 16 mm;

[0084] Length: 15 - 35 cm, Thickness: 36 mm;

[0085] That is, starting from this end, the visual sensor 16 starts to recognize from one end. At the beginning, the control component receives the instruction 0 and controls the lamp tube 15 to emit blue light; when the visual sensor 16 recognizes a length of 15 cm, the control component receives the instruction 2 and controls the lamp tube 15 to emit red light.

[0086] The change in the color of this lamp tube 15 is due to the obvious difference in different light attenuation degrees. The attenuation of red light in the transparent material is small and the transmission effect is good. The contrast between red light and the transparent material is high, and scratches are easier to observe. Therefore, this red light is suitable for use in thicker areas; while the attenuation of white light in the transparent material is moderate, and it can transmit the headlight lamp cover in the range of 25 - 35 mm. Therefore, white light is selected in this thickness range; in thinner areas, due to the high contrast between blue light and the transparent material, scratches are easier to observe. Therefore, blue light is used in the range of 15 - 25 mm. Correspondingly, due to the different transmission effects of light in different materials, the operator can change the value range in the input module.

[0087] In the prior art, some defect detection devices also use the vision sensor 16 to detect the change of light by detecting the thicker area of the car lamp. However, this technology is not ideal in the actual detection process. First of all, when using the vision sensor 16 to distinguish between thick and thin, due to the refraction and reflection of light in the thicker area or the bent area, it will affect the judgment of the vision sensor 16 on the thickness, and it is easy to cause misjudgment. Moreover, the thickness of the car lamp is established data. Through this accurate data division, it is possible to simply and conveniently divide the range by inputting the thickness of different areas of the car lamp, and the accuracy of the result is higher and more convenient than the method using the vision sensor 16.

[0088] The characterization module receives the picture information transmitted by the vision sensor 16. The operator can intuitively distinguish the scratches through the characterization module. It should be noted that the control module controls the color change of the lamp tube 15, but it is only to facilitate the recognition effect of the vision sensor 16. When the vision sensor 16 transmits an image, the picture segments of different colors it recognizes are converted into black and white pictures for the convenience of the operator's observation.

[0089] Embodiment 4, a defect detection method for automotive lamp production, using the defect detection device for automotive lamp production as described above, includes the following steps:

[0090] S1. When detecting the transparent lamp cover of the car lamp, the transparent lamp cover can be first installed on the movable part 28, and then the robotic arm 13 is started to drive the lamp tube 15 and the vision sensor 16 close to the surface of the transparent lamp cover, so as to detect the scratch defects on the surface of the transparent lamp cover.

[0091] S2. If the shallower scratches on the surface of the transparent lamp cover are affected by the previous coating process, resulting in difficulty in detecting the shallower scratches, the telescopic cylinder 23 can be started, and its telescopic end pushes the telescopic strip 24 close to the upper part of the transparent lamp cover, so that the spray pipe 25 and the spray head 26 are displaced synchronously. At this time, the spray head 26 can spray water droplets onto the surface of the transparent lamp cover, and the water droplets slide along the surface of the transparent lamp cover. When the water droplets pass through the shallower scratches on the surface of the transparent lamp cover, it will cause the water droplets to gather or flow irregularly. When detecting again through the vision sensor 16, the state of the water droplets can be used to judge whether there are scratches.

[0092] S3. During the operation of S2, the movable part 28 is started. On the one hand, the transparent lamp cover can be clamped through the mechanism on the movable part 28, and on the other hand, it can drive the transparent lamp cover to swing in all directions, so that the water droplets slide repeatedly on the surface of the transparent lamp cover, and contact detection is carried out for scratches in different directions, so as to ensure the accuracy of scratch detection.

[0093] S4. When the robotic arm 13 drives the lamp tube 15 and the vision sensor 16 close to the corner of the transparent lamp housing, the detected light will be refracted or reflected at the corner at this time. The refracted and reflected rays will cause a relatively high illumination intensity of the light, and the relatively high-intensity light will affect the detection accuracy of the sensor and the visibility of scratches. Therefore, on the one hand, the first compression cylinder 32 is activated, and its telescopic end pushes the first compression plate 34 close to the transparent lamp housing through the first compression strip 33; on the other hand, the second compression cylinder 35 is activated, and its telescopic end pushes the second compression plate 37 close to the transparent lamp housing through the second compression strip 36. During this process, the second compression plate 37 will also squeeze the third compression plate 38; thereby enabling the baffle 31, the first compression plate 34, the second compression plate 37, and the third compression plate 38 to surround and block the periphery of the transparent lamp housing, so as to reduce the interference of external light, internal refracted or reflected light.

[0094] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the scope of protection of the present invention.

Claims

1. A defect detection device for automobile lamp production, characterized in that: including a detection component (1), which includes a support base (11), a guardrail (12) arranged on the top of the support base (11), a robotic arm (13) arranged in the middle of the guardrail (12), a fixed disk (14) arranged at the execution end of the robotic arm (13), lamp tubes (15) uniformly arranged on one side of the fixed disk (14) away from the robotic arm (13), and a vision sensor (16) arranged in the middle of the lamp tubes (15); a trace showing component (2), arranged on one side of the robotic arm (13), which includes long plates (21) symmetrically arranged in the axial direction above the guardrail (12), short plates (22) symmetrically arranged in the radial direction between the long plates (21), telescopic cylinders (23) symmetrically arranged in the axial direction on one side of one of the short plates (22), telescopic bars (24) arranged at the telescopic ends of the telescopic cylinders (23), spray pipes (25) uniformly arranged between the telescopic bars (24), spray heads (26) uniformly arranged on the outer walls of the spray pipes (25), guide members (27) arranged on one side of the telescopic bars (24) away from the spray pipes (25), and movable members (28) arranged below the spray pipes (25); the guide members (27) are used to guide and slide the spray pipes (25) and the spray heads (26), and the movable members (28) are used to drive the transparent car lamp cover to swing in the circumferential direction; the movable member (28) includes a fixing plate (281), a radial motor (282) arranged on the top of the fixing plate (281), a radial shaft (2821) arranged at the output end of the radial motor (282), a radial worm (2822) arranged on the radial shaft (2821), first fixed slide rails (283) symmetrically arranged in the radial direction on the top of the fixing plate (281), a first slide plate (2831) arranged on one side of the first fixed slide rails (283), a first arc track (284) arranged between the first slide plates (2831), an axial motor (285) arranged on one side of the first arc track (284), an axial shaft (2851) arranged at the output end of the axial motor (285), an axial worm (2852) arranged on the axial shaft (2851), second fixed slide rails (286) symmetrically arranged in the axial direction on the top of the fixing plate (281), a second slide plate (2861) arranged on one side of the second fixed slide rails (286), a second arc track (287) arranged between the second slide plates (2861), and a movable plate (288) arranged above the first arc track (284); The fixed plate (281) is located at the top of the support base (11). Both the radial shaft (2821) and the axial shaft (2851) are connected to the top of the fixed plate (281) through bearing seats. A first chute (2832) is formed on the side wall of the first fixed slide rail (283) close to the first slide plate (2831). The two first chutes (2832) are distributed oppositely. The first slide plate (2831) is slidably fitted in the corresponding first chute (2832). First teeth (2833) are evenly formed at the bottom of the first slide plate (2831). The first teeth (2833) are in meshing transmission with the corresponding radial worm (2822).

2. The defect detection device for automotive lamp production according to claim 1, characterized in that: A compression assembly (3) is further arranged on the movable member (28). The compression assembly (3) includes a baffle (31), a first compression cylinder (32) arranged on one side of the baffle (31), a first compression bar (33) arranged at the telescopic end of the first compression cylinder (32), a first compression plate (34) arranged at the end of the first compression bar (33) away from the first compression cylinder (32), a second compression cylinder (35) arranged on one side of the first compression plate (34), a second compression bar (36) arranged at the telescopic end of the second compression cylinder (35), a second compression plate (37) arranged at the end of the second compression bar (36) away from the second compression cylinder (35), a third compression plate (38) arranged on one side of the second compression plate (37), and a self-adjusting member (39) arranged at the end of the third compression plate (38) away from the second compression plate (37). The self-adjusting member (39) is used for resetting the third compression plate (38).

3. The defect detection device for automobile lamp production according to claim 1, characterized in that: Guide grooves (211) are formed on the side wall of the long plate (21). The two guide grooves (211) are arranged oppositely. The bottom of the short plate (22) is connected to the top of the guardrail (12). The telescopic end of the telescopic cylinder (23) penetrates through the side wall of one of the short plates (22) and is connected to the telescopic bar (24).

4. The defect detection device for automobile lamp production according to claim 3, characterized in that: The guiding member (27) includes guiding plates (271) symmetrically arranged in the radial direction at the top of the telescopic bar (24), and guiding rollers (272) rotatably connected to the side of the guiding plates (271) away from the telescopic bar (24). The guiding rollers (272) can slide in the corresponding guide grooves (211).

5. The defect detection device for automobile lamp production according to claim 1, characterized in that: A second chute (2862) is formed on the side wall of the second fixed slide rail (286) close to the second slide plate (2861). The two second chutes (2862) are distributed oppositely. The second slide plate (2861) is slidably fitted in the corresponding second chute (2862). Second teeth (2863) are evenly formed at the bottom of the second slide plate (2861). The second teeth (2863) are in meshing transmission with the corresponding axial worm (2852). The first arc track (284) and the second arc track (287) are distributed in a cross shape. The first arc track (284) is located above the second arc track (287). A first rail block (2881) is provided at the bottom of the movable plate (288). A second rail block (2882) is provided on the side of the first rail block (2881) away from the movable plate (288). The first rail block (2881) is slidably engaged within the first arcuate track (284). The second rail block (2882) is slidably engaged within the second arcuate track (287). A clamping member (289) is further provided at the top of the movable plate (288); the clamping member (289) is used for clamping and fixing the transparent car headlight cover.

6. The defect detection device for automobile lamp production according to claim 2, wherein: The compression assembly (3) is located on the movable plate (288). The bottom of the baffle (31) is connected to the top of the movable plate (288). The outer walls of the first compression cylinder (32) and the second compression cylinder (35) are both connected to the side wall of the movable plate (288). The second compression cylinder (35) is inclined. The baffle (31), the first compression plate (34), the second compression plate (37), and the third compression plate (38) surround to form a square.

7. The defect detection device for automobile lamp production according to claim 6, characterized in that: The self-adjusting member (39) includes an adjusting plate (391), a spring (392) disposed within the adjusting plate (391), and a displacement block (393) disposed at one end of the spring (392); One end of the adjusting plate (391) is connected to the side wall of the movable plate (288). A displacement groove (394) is formed at the top of the adjusting plate (391). The end of the spring (392) away from the displacement block (393) is connected to the inner wall of the displacement groove (394). The end of the displacement block (393) away from the spring (392) is connected to the end of the third compression plate (38) away from the second compression plate (37).

8. The defect detection device for automobile lamp production according to claim 1, characterized in that: The lamp tube (15) has a built-in control program, and the control program is electrically connected to the vision sensor (16). The lamp tube (15) changes color according to the settings of the control program. The colors of the lamp tube (15) include: red, white, and blue; The control program includes an input module, a control module, and a characterization module; The input module inputs car headlight values manually, including length and thickness, and inputs different instructions to the control module according to different thickness value ranges corresponding to the length value; The control module controls the lamp tube (15) to change color, and the vision sensor (16) feeds back the recognized length to the control module in real time; The characterization module is used to receive the picture signal transmitted by the vision sensor (16); The input module sends different instructions to the control module according to different input ranges, and its thickness range is: When the thickness value corresponding to the length value is in the range of 15 - 25 mm (excluding 25 mm), input 0 to the control module; When the thickness value corresponding to the length value is in the range of 25 - 35 mm (excluding 35 mm), input 1 to the control module; When the thickness value corresponding to the length value is in the range of 35 - 40 mm, input 2 to the control module; When the control module receives instruction 0, it controls the color of the lamp tube (15) to change to blue. When the control module receives instruction 1, it controls the color of the lamp tube (15) to change to white. When the control module receives instruction 2, it controls the color of the lamp tube (15) to change to red.

9. A defect detection method for automotive lamp production, using the defect detection device for automotive lamp production according to any one of claims 1-8, characterized in that, It includes the following steps: S1. When detecting the transparent car headlight cover, the transparent car headlight cover can be first installed on the movable part (28), and then the robotic arm (13) is activated to drive the lamp tube (15) and the vision sensor (16) close to the surface of the transparent car headlight cover, so as to detect the scratch defects on the surface of the transparent car headlight cover. S2. If the shallow scratches on the surface of the transparent car headlight cover are affected by the previous coating process, making it difficult to detect the shallow scratches, the telescopic cylinder (23) can be activated. Its telescopic end pushes the telescopic strip (24) close to the upper part of the transparent car headlight cover, causing the spray pipe (25) and the spray head (26) to move synchronously. At this time, the spray head (26) can spray water droplets onto the surface of the transparent car headlight cover, and the water droplets slide along the surface of the transparent car headlight cover. When the water droplets pass through the shallow scratches on the surface of the transparent car headlight cover, it will cause the water droplets to gather or flow irregularly. When detecting again through the vision sensor (16), the state of the water droplets can be used to determine whether there are scratches. S3. During the operation of S2, the movable part (28) is activated. On the one hand, the transparent car headlight cover can be clamped by the mechanism on the movable part (28). On the other hand, it can drive the transparent car headlight cover to swing in all directions, making the water droplets slide repeatedly on the surface of the transparent car headlight cover, and conduct contact detection for scratches in different directions, so as to ensure the accuracy of scratch detection. S4. When the robotic arm (13) drives the lamp tube (15) and the vision sensor (16) close to the corner of the transparent car headlight cover, the detection light will be refracted or reflected at the corner at this time. The refracted and reflected rays will cause the illumination intensity of the light to be relatively high, and the relatively high-intensity light will affect the detection accuracy of the sensor and the visibility of the scratches. Therefore, on the one hand, the first compression cylinder (32) is activated, and its telescopic end pushes the first compression plate (34) close to the transparent car headlight cover through the first compression strip (33). On the other hand, the second compression cylinder (35) is activated, and its telescopic end pushes the second compression plate (37) close to the transparent car headlight cover through the second compression strip (36). During this process, the second compression plate (37) will also squeeze the third compression plate (38). Thus, the baffle (31), the first compression plate (34), the second compression plate (37) and the third compression plate (38) surround and block the periphery of the transparent car headlight cover, so as to reduce the interference of external light, internal refracted or reflected light.

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