An angle adjustable light source for tire shoulder detection

Abstract

The application discloses an angle-adjustable light source for tire shoulder detection, which comprises a shell, a first linear light source is installed on one side of the inside of the shell, and a second linear light source is installed on the other side; the first linear light source is obliquely irradiated to one side of the tire shoulder, the second linear light source is obliquely irradiated to the other side of the tire shoulder, at least one first camera for collecting reflected light of the tire shoulder is arranged between the first linear light source and the second linear light source, first angle adjusting assemblies are arranged at both ends of the first linear light source and the second linear light source, the first angle adjusting assemblies are used for adjusting the oblique angles of the first linear light source and the second linear light source, so as to accurately control the incidence and reflection paths of the light, dust removing assemblies are installed on both sides of the bottom of the shell, and the dust removing assemblies are used for cleaning the bottom surface of the shell; and the irradiation angle of the light source is quickly adjusted through rotation, so that the detection requirements of different tire shoulders can be met.

Description

Technical Field

[0001] This invention relates to the field of detection light source technology, and in particular to an angle-adjustable light source for tire shoulder detection. Background Technology

[0002] A tire includes a tread, a sidewall, and a shoulder. The tread contacts the road surface, the sidewall is located on both sides of the tire, and the shoulder connects the tread and the sidewall. The design of the shoulder is generally unique and diverse, which determines the handling performance of the vehicle. A good sidewall design can withstand greater deformation.

[0003] After tire production is completed, the tire shoulder needs to be inspected. The tire shoulder is a black rubber curved surface with a curved texture. Its reflective properties are complex and easily affected by the angle of illumination, resulting in unstable image quality. Under traditional uniform lighting, the image contrast is extremely low, making it difficult to detect subtle defects.

[0004] Existing testing equipment mostly uses fixed-angle light sources, which are difficult to adapt to changing testing needs and are inconvenient to adjust. The camera device is used statically and cannot be compatible with the testing needs of tire products of various sizes, shapes and types of defects. It is also prone to creating blind spots in the lighting, which affects the testing accuracy.

[0005] Meanwhile, the production environment of tires is generally harsh, with a lot of black particles in the air, which will stick to the surface of the detection light source. Over time, the dust on the surface will thicken, which will lead to a decrease in light intensity and uneven light, affecting the detection results of the detection light source. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of inconvenient angle adjustment and limited illumination range in the prior art, and to provide an angle-adjustable light source for tire shoulder detection. The illumination angle of the light source can be quickly adjusted by rotation to adapt to the detection needs of different tire shoulders. Furthermore, it can automatically remove dust from the surface of the light source to ensure the reliability of the light source detection results.

[0007] To achieve the above objectives, the present invention provides an angle-adjustable light source for tire shoulder detection, comprising a housing, wherein a first linear light source is installed on one side of the interior of the housing, and a second linear light source is installed on the other side; the first linear light source obliquely illuminates one side of the tire shoulder, and the second linear light source obliquely illuminates the other side of the tire shoulder; at least one first camera for collecting reflected light from the tire shoulder is installed between the first and second linear light sources; a first angle adjustment component is installed at both ends of the first and second linear light sources, the first angle adjustment component being used to adjust the tilt angle of the first and second linear light sources to precisely control the incident and reflection paths of the light; dust removal components are installed on both sides of the bottom of the housing, the dust removal components being used to clean the bottom surface of the housing.

[0008] Preferably, the housing includes an upper housing mounted on the upper part, the upper housing having a receiving chamber, the receiving chamber having a first linear light source, a second linear light source and a first camera installed inside; end plates are mounted on both sides of the upper housing, and the first linear light source and the second linear light source are connected to the end plates through a first angle adjustment component.

[0009] Preferably, the first angle adjustment component includes a first arc-shaped groove disposed on the end plate, and a second arc-shaped groove disposed at the lower part of the first arc-shaped groove; the first arc-shaped groove and the second arc-shaped groove are used to adjust the tilt angle of the first linear light source or the second linear light source; the first arc-shaped groove is provided with a first angle scale; a first adjusting bolt is installed inside both the first arc-shaped groove and the second arc-shaped groove, one end of the first adjusting bolt passes through the first arc-shaped groove and the second arc-shaped groove, and is bolted to the first linear light source or the second linear light source.

[0010] Preferably, the cavity is further equipped with a second camera arranged parallel to the first camera. The first and second cameras are arranged along the direction of the first or second linear light source and are positioned inwards relative to each other. The first camera is used to collect reflected light from the front of the tire shoulder, and the second camera is used to collect reflected light from the rear of the tire shoulder.

[0011] Preferably, a plurality of mounting profiles are installed between the end plates, and a mounting plate is mounted on the mounting profiles. An L-shaped camera bracket is mounted on the mounting plate, and a first camera or a second camera is mounted on the L-shaped camera bracket. The L-shaped camera bracket is also provided with a second angle adjustment component for adjusting the angle of the first camera and the second camera. The second angle adjustment component includes a third arc-shaped groove disposed on the L-shaped camera bracket and a fourth arc-shaped groove disposed on the upper part of the third arc-shaped groove. The third arc-shaped groove and the fourth arc-shaped groove are used to adjust the tilt angle of the first camera or the second camera. The third arc-shaped groove is provided with a second angle scale. A second adjusting bolt is installed inside the third arc-shaped groove and the fourth arc-shaped groove. One end of the second adjusting bolt passes through the third arc-shaped groove and the fourth arc-shaped groove and is bolted to the mounting plate.

[0012] Preferably, the upper housing is U-shaped and includes an upper plate mounted on the upper part and side panels mounted on both sides of the upper plate. The side panels are detachably connected to the end plates by connecting bolts. The lower side panels can be removed to adjust the tilt angle of the first camera or the second camera.

[0013] Preferably, a sensor is installed between the first camera and the second camera, the sensor being used to detect whether the tire is in position; the sensor is bolted to the mounting plate via a sensor fixing plate, and the mounting plate is provided with a U-shaped groove for adjusting the longitudinal position of the sensor fixing plate.

[0014] Preferably, the housing further includes a lower fixing plate installed at the bottom. The lower fixing plate, the upper housing, and the two side end plates are used to seal the receiving chamber. The lower fixing plate has a stepped groove in the middle, and anti-reflective glass is bonded inside the stepped groove. The light emitted downward from the first linear light source and the second linear light source passes through the anti-reflective glass and illuminates the tire shoulder.

[0015] Preferably, the dust removal assembly is installed on both sides of the lower fixed plate for cleaning the anti-reflective glass. The dust removal assembly includes a mounting block installed on one side of the lower fixed plate and an air knife installed on the mounting block. The air outlet of the air knife is located on one side of the light-emitting surface of the anti-reflective glass. The mounting block is provided with a third angle adjustment assembly for adjusting the angle of the air knife. The third angle adjustment assembly includes a fifth arc-shaped groove on the mounting block and a connecting hole installed at the lower part of the fifth arc-shaped groove. The fifth arc-shaped groove is used to adjust the tilt angle of the air knife. The connecting hole is used to connect with the air knife and allows the air knife to rotate around the connecting hole to adjust the tilt angle of the air knife. A third adjusting bolt is installed inside each of the fifth arc-shaped grooves. One end of the third adjusting bolt passes through the fifth arc-shaped groove and is bolted to the air knife. The air knife is provided with several air inlets. The air inlets are connected to an air source through an air pipe. The air pipe is provided with a solenoid valve, which controls the opening of the air knife.

[0016] Preferably, both the first and second linear light sources include an external housing. The housing contains a first receiving groove, inside which a PCB board is installed. LED beads are mounted on the PCB board. Above the first receiving groove is a second receiving groove, inside which a focusing rod is installed. Above the second receiving groove is a third receiving groove, inside which a diffuser plate is installed. The diffuser plate covers the housing and is located in the light-emitting direction of the focusing rod. End caps are installed at both ends of the housing, sealing both ends and limiting the internal PCB board, focusing rod, and diffuser plate. The first and second linear light sources also include a power cord, which passes through the end caps and is electrically connected to the PCB board, providing power to the LED beads and driving them to emit light.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] This invention moves the tire to a position below a light source for inspection. A first linear light source illuminates one side of the tire shoulder at an angle, while a second linear light source illuminates the other side, thus covering both sides of the tire and achieving uniform illumination of both tire shoulders. The light illuminating the tire shoulders is reflected and enters a first camera. The first camera transmits the received image information to an image processing system, which analyzes the image using an algorithm to generate a three-dimensional topographic image of the tire shoulder surface. By comparing with standard model data, various defects on the tire shoulder, such as dents, scratches, bulges, missing characters, and foreign matter attachments, can be accurately identified. Furthermore, the first and second linear light sources are adjusted by a first angle adjustment component to change the angle of the emitted light, adapting to the inspection needs of different tire shoulders. The first angle adjustment component changes the incident light angle by rotating the light source housing, ensuring accurate coverage of the target area and improving imaging contrast and detection accuracy. Even further, dust removal components are installed on both sides of the bottom of the housing to clean the bottom surface of the housing, ensuring the reliability of the light source detection results. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front structural schematic diagram of an angle-adjustable light source for tire shoulder detection provided by the present invention;

[0021] Figure 2 This is a schematic diagram of the bottom structure of an angle-adjustable light source for tire shoulder detection provided by the present invention;

[0022] Figure 3 This is an exploded bottom view of an angle-adjustable light source for tire shoulder detection provided by the present invention.

[0023] Figure 4 This is a side disassembly diagram of an angle-adjustable light source for tire shoulder detection provided by the present invention;

[0024] Figure 5 This is a schematic diagram of the internal structure of an angle-adjustable light source for tire shoulder detection provided by the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the first linear light source provided by the present invention;

[0026] Figure 7This is a schematic diagram of the structure of the first linear light source with the end cap removed, provided by the present invention;

[0027] Figure 8 This is an exploded schematic diagram of the first linear light source provided by the present invention.

[0028] The diagram includes:

[0029] 1. Outer shell; 2. First linear light source; 3. Second linear light source; 41. First camera; 31. First angle adjustment assembly; 6. Dust removal assembly; 11. Upper shell; 13. Receiving chamber; 14. End plate; 141. First arc-shaped groove; 142. Second arc-shaped groove; 144. First angle scale; 42. Second camera; 43. Mounting profile; 44. Mounting plate; 45. L-shaped camera bracket; 32. Second angle adjustment assembly; 46. Third arc-shaped groove; 48. Fourth arc-shaped groove; 47. Second angle scale; 111. Upper... 112. Side panel; 5. Sensor; 51. Sensor mounting plate; 52. U-shaped groove; 12. Lower mounting plate; 15. Stepped groove; 16. Anti-reflective glass; 61. Mounting block; 62. Air knife; 33. Third angle adjustment component; 63. Fifth arc groove; 64. Connection hole; 65. Air inlet; 21. Housing; 22. First receiving groove; 23. PCB board; 24. LED beads; 25. Second receiving groove; 26. Focusing rod; 27. Third receiving groove; 28. Diffuser plate; 29. ​​End cap; 20. Power cord. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are one embodiment of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please refer to Figures 1 to 8 The present invention provides an angle-adjustable light source for tire shoulder detection.

[0032] like Figure 2 As shown, the angle-adjustable light source includes a light source body 10, which includes an outer shell 1. The outer shell 1 is composed of an upper shell 11, a lower fixing plate 12, and end plates 14 on both sides. The inner part of the outer shell 1 is provided with a receiving chamber 13 for installing core components such as a linear light source, a sensor 5, and a camera.

[0033] In this embodiment, as Figure 2As shown, the upper housing 11 is U-shaped, which facilitates connection with the end plates on both sides and also facilitates fastening to the lower fixing plate 12 with screws to form a closed receiving chamber 13.

[0034] like Figure 4 As shown, the receiving chamber 13 is equipped with a first linear light source 2 and a second linear light source 3. The first linear light source 2 is located on one side of the receiving chamber 13, and the second linear light source 3 is located on the other side of the receiving chamber 13. The two are arranged opposite each other to achieve uniform illumination of both sides of the tire shoulder area. Specifically, the first linear light source 2 illuminates one side of the tire shoulder at an angle, and the second linear light source 3 illuminates the other side of the tire shoulder at an angle. The tilt angle of the two light sources can be adjusted according to the detection requirements to ensure that the light covers the tire shoulder surface with the optimal incident angle, enhancing the contrast of surface defects.

[0035] Furthermore, in order to achieve precise adjustment of the illumination angle of the light source, both ends of the first linear light source 2 and the second linear light source 3 are equipped with a first angle adjustment component 31. The first angle adjustment component 31 is used to adjust the tilt angle of the first linear light source 2 and the second linear light source 3 in order to precisely control the incident and reflection paths of the light.

[0036] Furthermore, to acquire high-definition images of the tire shoulder surface, at least one first camera 41 for acquiring reflected light from the tire shoulder is installed between the first linear light source 2 and the second linear light source 3. If only one first camera 41 is installed, it is fixed in the middle of the receiving chamber 13. In a second embodiment, a first camera 41 and a second camera 42 are installed between the first linear light source 2 and the second linear light source 3, arranged one in front of the other, along the direction of either the first linear light source 2 or the second linear light source 3, and facing inwards towards each other. The first camera 41 is used to acquire reflected light from the front of the tire shoulder, and the second camera 42 is used to acquire reflected light from the rear of the tire shoulder. By working collaboratively with the dual cameras, complete image information of the front and rear areas of the tire shoulder can be acquired simultaneously, improving detection efficiency and accuracy.

[0037] To achieve more accurate detection of the tire shoulder area, dust removal components 6 are installed on both sides of the bottom of the housing 1. The dust removal components 6 are used to clean and remove dust from the bottom surface of the housing 1 to prevent dust accumulation from affecting the detection accuracy. The airflow blown out by the dust removal components 6 forms a continuous positive pressure air curtain barrier between the light source body 10 and the tire, actively blowing away and preventing contaminants such as rubber dust, oil mist, and water vapor from adhering. This air curtain barrier can keep the optical path clean.

[0038] In this embodiment, end plates 14 are installed on both sides of the upper housing 11. The first linear light source 2 and the second linear light source 3 are connected to the end plates 14 through the first angle adjustment component 31, so that the first angle adjustment component 31 can be operated outside the end plates 14 to realize real-time fine adjustment of the tilt angle of the first linear light source 2 and the second linear light source 3, so as to adapt to the detection needs of tire shoulders of different specifications.

[0039] Furthermore, such as Figure 5 As shown, the first angle adjustment component 31 includes a first arc-shaped groove 141 disposed on the end plate 14, and a second arc-shaped groove 142 disposed at the lower part of the first arc-shaped groove 141. A first adjusting bolt is installed inside both the first arc-shaped groove 141 and the second arc-shaped groove 142. One end of the first adjusting bolt passes through the first arc-shaped groove 141 and the second arc-shaped groove 142 and is bolted to the first linear light source 2 or the second linear light source 3. By tightening or loosening the first adjusting bolt, the first linear light source 2 or the second linear light source 3 can be driven to rotate around the first arc-shaped groove 141 and the second arc-shaped groove 142, thereby adjusting the tilt angle of the first linear light source 2 or the second linear light source 3, achieving precise control of the light incident angle, and ensuring optimal lighting effect under different tire shoulder curvatures. The first arc-shaped groove 141 and the second arc-shaped groove 142 are concentrically distributed, ensuring that the light source maintains a stable posture during adjustment and avoiding eccentric vibration.

[0040] Furthermore, the first arc-shaped groove 141 is provided with a first angle scale 144; the first angle scale 144 is evenly distributed along the circumference of the arc-shaped groove, and is used to display the tilt angle value of the first linear light source 2 or the second linear light source 3 in real time, so as to accurately adjust and record the optimal illumination angle under different detection scenarios; by reading the value of the first angle scale 144, the operator can quickly reproduce the verified light source angle configuration, thereby improving the efficiency and consistency of equipment debugging.

[0041] like Figure 4 As shown, the first camera 41 and the second camera 42 are arranged along the direction of the first linear light source 2 or the second linear light source 3. The first camera 41 and the second camera 42 are arranged facing each other inward. The first camera 41 is used to collect the reflected light from the front of the tire shoulder, and the second camera 42 is used to collect the reflected light from the rear of the tire shoulder.

[0042] The first camera 41 and the second camera 42 capture the contour, raised defects, characters, and surface texture of the tire shoulder, and image them in the cameras in a high-contrast manner, generating two detection images that can be used for stereo analysis or regional complementation. By simultaneously acquiring the two images, the system can perform edge stitching and three-dimensional reconstruction, effectively eliminating imaging blind spots under a single viewpoint and improving the detection rate of minor defects in the tire shoulder area. Combined with the light source angle adjustment function, the surface feature imaging effect can be optimized under different incident light, further enhancing image contrast and texture clarity, and meeting the accuracy and stability requirements of multi-specification tires in high-speed inspection scenarios.

[0043] like Figure 5 As shown, based on the angle adjustment of the first linear light source 2 and the second linear light source 3, the coordinated angle adjustment of the first camera 41 and the second camera 42 is further realized, thereby achieving synchronous matching of the light path and the field of view.

[0044] Specifically, such as Figure 4 As shown, a plurality of mounting profiles 43 are installed between the end plates 14. Mounting plates 44 are mounted on the mounting profiles 43. An L-shaped camera bracket 45 is mounted on the mounting plate 44. A first camera 41 or a second camera 42 is mounted on the L-shaped camera bracket 45. A second angle adjustment component 32 for adjusting the angle of the first camera 41 and the second camera 42 is also provided on the L-shaped camera bracket 45. The second angle adjustment component 32 is linked with the first angle adjustment component 31 to achieve precise matching between the illumination optical path and the imaging field of view.

[0045] Furthermore, such as Figure 4 As shown, the second angle adjustment component 32 includes a third arc-shaped groove 46 disposed on the L-shaped camera bracket 45 and a fourth arc-shaped groove 48 disposed on the upper part of the third arc-shaped groove 46. The third arc-shaped groove 46 is provided with a second angle scale 47. A second adjustment bolt is installed inside both the third arc-shaped groove 46 and the fourth arc-shaped groove 48. One end of the second adjustment bolt passes through the third arc-shaped groove 46 and the fourth arc-shaped groove 48 and is bolted to the mounting plate 44.

[0046] By tightening or loosening the second adjusting bolt, the L-shaped camera bracket 45 can be rotated around the center of the third arc-shaped groove 46 and the fourth arc-shaped groove 48, thereby adjusting the pitch angle of the first camera 41 and the second camera 42; the second angle scale 47 on the third arc-shaped groove 46 is used to calibrate the camera angle to ensure adjustment accuracy.

[0047] like Figure 4As shown, since the second angle adjustment component 32 is located inside the receiving chamber 13, it is difficult to directly adjust the angle due to space limitations. In order to facilitate the angle adjustment, the upper housing 11 needs to be disassembled. The second angle adjustment component 32 can only be operated after the upper housing 11 is disassembled. In one embodiment, the upper housing 11 is an integral structure, which is fixed to the end plate 14 by detachable screws. When disassembling, the upper housing 11 can be removed simply by loosening the screws, which facilitates the operation of the second angle adjustment component 32. After the adjustment is completed, the upper housing 11 is reinstalled and the screws are tightened to ensure the overall sealing and stability of the equipment, while avoiding external light interference with the imaging quality.

[0048] In another embodiment, such as Figure 4 As shown, the upper housing 11 adopts a split design, including an independently detachable upper plate 111 and a side panel 112. The side panel 112 is detachably connected to the end plate 14 by connecting bolts. By removing the lower side panel 112, the tilt angle of the first camera 41 or the second camera 42 can be adjusted. This split structure only requires disassembling a part of the housing to complete the angle adjustment, effectively improving the convenience of operation and reducing maintenance time.

[0049] like Figure 5 As shown, a sensor 5 is installed between the first camera 41 and the second camera 42. The sensor 5 is used to detect whether the tire is in position. When the tire enters the detection area, the sensor 5 transmits a signal to the control system, triggering the first linear light source 2 and the second linear light source 3 to emit light outwards. At the same time, the first camera 41 and the second camera 42 are started to acquire images. The setting of the sensor 5 realizes the automatic triggering of the detection process, effectively improving the detection efficiency and accuracy, and avoiding errors caused by human intervention.

[0050] Furthermore, the sensor 5 is bolted to the mounting plate 44 via the sensor fixing plate 51. In order to adapt to the detection requirements of tires of different specifications, the mounting plate 44 is provided with a U-shaped groove 52. The U-shaped groove 52 is used to adjust the longitudinal position of the sensor fixing plate 51, thereby indirectly adjusting the longitudinal position of the sensor 5 to adapt to the positioning detection of tires of different diameters.

[0051] like Figure 2 As shown, the lower fixing plate 12, the upper housing 11, and the two side end plates 14 are used to seal the receiving chamber 13, as follows: Figure 3As shown, the lower fixing plate 12 has a stepped groove 15 in the middle, and an anti-reflective glass 16 is bonded inside the stepped groove 15. The light emitted downward from the first linear light source 2 and the second linear light source 3 passes through the anti-reflective glass 16 and illuminates the tire shoulder. The surface of the anti-reflective glass 16 is treated with a special coating to effectively reduce light reflection loss, improve light transmittance, and ensure uniform and stable light intensity illuminating the tire surface, thereby improving imaging clarity and detection accuracy. At the same time, the structural design of the stepped groove 15 can prevent external impurities from entering the cavity, keeping the optical path clean and further ensuring long-term operational reliability. The edge of the anti-reflective glass 16 is sealed with adhesive to the stepped groove 15 to ensure reliable connection and dustproof sealing.

[0052] like Figure 1 As shown, the dust removal assembly 6 is installed on both sides of the lower fixing plate 12 for cleaning the anti-reflective glass 16. The dust removal assembly 6 includes a mounting block 61 installed on one side of the lower fixing plate 12 and an air knife 62 installed on the mounting block 61. The air outlet of the air knife 62 is located on the light-emitting surface of the anti-reflective glass 16. The mounting block 61 is provided with a third angle adjustment assembly 33 for adjusting the angle of the air knife 62. The third angle adjustment assembly 33 can finely adjust the pitch angle of the air knife 62 to ensure that the airflow direction accurately covers the surface of the anti-reflective glass 16, effectively blowing away the attached dust and debris. The adjustment range of the third angle adjustment assembly 33 for the air knife 62 is 0-180° rotation adjustment. Specifically, the air knife 62 can sweep across the surface of the anti-reflective glass 16 at an acute angle, preferably 15°. The airflow sweeping at a 15° angle can form a uniform air barrier on the surface of the anti-reflective glass 16, effectively avoiding dust deposition and reducing the interference of turbulence on the optical path. The air knife 62 is driven by external compressed air, and the outlet airflow speed is stable and controllable, ensuring that the cleaning process does not damage the surface coating of the anti-reflective glass 16. The dust removal component 6 is linked with the sensor 5 for control. Before the detection system is in standby or starting up, it automatically executes a cleaning program to ensure the clarity and stability of the optical system during each detection, further improving detection repeatability and reliability. In addition, the air knife 62's outlet adopts a slit design with a width of 0.5mm, which can concentrate airflow energy and improve cleaning efficiency; the slit is arranged along the long side of the anti-reflective glass 16 to ensure that the airflow covers the entire optical window.

[0053] like Figure 1As shown, the third angle adjustment component 33 includes a fifth arc-shaped groove 63 disposed on the mounting block 61 and a connecting hole 64 disposed at the lower part of the fifth arc-shaped groove 63. The fifth arc-shaped groove 63 is used to adjust the tilt angle of the air knife 62; the connecting hole 64 is used to connect with the air knife 62, and allows the air knife 62 to rotate around the connecting hole 64 to adjust the tilt angle of the air knife 62; each of the fifth arc-shaped grooves 63 is equipped with a third adjusting bolt, one end of which passes through the fifth arc-shaped groove 63 and is bolted to the air knife 62; by tightening or loosening the third adjusting bolt, the air knife 62 can be adjusted to the required angle position, thereby achieving precise control of the airflow direction and ensuring stable and reliable cleaning effect.

[0054] Furthermore, the air knife 62 is equipped with several air inlet ports 65, which are evenly distributed on the side of the air knife 62 for easy connection to external air source pipelines. The air inlet ports 65 are interconnected to ensure balanced airflow distribution and improve airflow consistency. A solenoid valve is installed on the air pipe, which controls the opening of the air knife 62. The solenoid valve is electrically connected to the control system and can automatically open and close according to a preset program or sensor signals, achieving timed and targeted cleaning of the air knife 62.

[0055] In this embodiment, as Figures 6 to 8 As shown, the first linear light source 2 and the second linear light source 3 have the same structure, both including an outer housing 21. The outer housing 21 is provided with heat dissipation fins, and the inner housing is provided with a first receiving groove 22. The first receiving groove 22 is provided with a PCB board 23. The PCB board 23 is provided with LED beads 24. The LED beads 24 are electrically connected to the power line 20 through the PCB board 23.

[0056] like Figures 6 to 8 As shown, the first receiving groove 22 is provided with a second receiving groove 25 at its upper part. A focusing rod 26 is installed inside the second receiving groove 25 along the length of the second receiving groove 25. A third receiving groove 27 is provided above the second receiving groove 25. A diffuser plate 28 is installed inside the third receiving groove 27. The diffuser plate 28 covers the housing 21 and is located in the light emission direction of the focusing rod 26. The diffuser plate 28 uniformly diffuses the light emitted by the LED beads 24, making the light emission softer and more stable, and effectively avoiding local bright spots or uneven light. The focusing rod 26 converges the scattered light emitted by the LED beads 24 on the PCB board 23 into parallel light emitted in a linear direction, improving the utilization rate of the light source and the lighting accuracy.

[0057] Both ends of the housing 21 are equipped with end caps 29, which seal both ends of the housing 21 and limit the internal PCB board 23, focusing rod 26 and diffuser plate 28.

[0058] The strip light source 2 also includes a power line 20, which passes through the end cover 29 and is electrically connected to the PCB board 23 to provide power to the LED beads 24 and drive the LED beads 24 to emit light.

[0059] The process of using the angle-adjustable light source:

[0060] Phase 1: Initialization phase, system preset and alignment adjustment; adjust the light source body 1 to the optimal working state according to the specifications of the tire to be inspected.

[0061] Step S1: Place the standard tire to be inspected on the inspection station, and position it below the light source body 1;

[0062] Step S2: Remove the side panel 112 to adjust the tilt angle of the first camera 41 or the second camera 42; the first camera 41 or the second camera 42 can be adjusted within a range of 8°; so that the center of the field of view of the first camera 41 and the second camera 42 accurately covers the target detection area of ​​the tire shoulder, such as: brand character area, tire sidewall main body area;

[0063] Step S3: Turn on the symmetrically arranged first linear light source 2 and second linear light source 3, and adjust them using their 20° adjustment range; fine-tune the illumination angle of each linear light source and observe the distribution of the light spot on the tire shoulder until a strip of light with uniform brightness and no obvious light-dark boundary is obtained; the tilt angle of the first linear light source 2 and the second linear light source 3 is 55°, and the first linear light source 2 and the second linear light source 3 should have left-right consistency when illuminating the tire shoulder.

[0064] Step S4: Activate the dust removal component 6, and the air knife 62 sprays gas outward; the third angle adjustment component 33 adjusts the air knife 62 within a range of 0-180° rotation; specifically, the air knife 62 can sweep across the surface of the anti-reflective glass 16 at an acute angle, preferably 15°. The airflow sweeping at a 15° angle can form a uniform air barrier on the surface of the anti-reflective glass 16, effectively preventing dust deposition and reducing turbulence interference with the optical path.

[0065] Through observation or testing, it was confirmed that the airflow can effectively cover the entire surface of the anti-reflective glass 16, and at this angle, there is no image jitter or artifact caused by airflow disturbance in the camera imaging, thus achieving the optimal balance between cleaning efficiency and optical stability.

[0066] Phase Two: Core Operation Phase, Online Detection and Synchronization Triggering. After system initialization, it enters an automatic online detection loop.

[0067] Step S21: The sensor 5 is triggered: the tire moves to the preset detection position along the production line, and the sensor 5 installed between the two cameras detects the tire's position first and immediately generates a high-precision trigger signal;

[0068] Step S22: The trigger signal is synchronously sent to two industrial cameras and a linear light source controller. The system controls the first linear light source 2 and the second linear light source 3 to reach their rated brightness in a very short time. At the same time, the first linear light source 2 and the second linear light source 3 illuminate the tire shoulder. The first camera 41 and the second camera 42 take pictures. This hard synchronization mechanism of "trigger-illumination-shooting" ensures the consistency of image position and the stability of lighting conditions, effectively freezing motion blur.

[0069] Step S23: Under the illumination of the first linear light source 2 and the second linear light source 3 at a 55° angle, the outline, protrusion defects, characters and surface texture of the tire shoulder are imaged in the two cameras in a high-contrast manner, generating two detection images that can be used for stereo analysis or regional complementarity.

[0070] Phase Three: The ongoing phase, involving continuous protection and state maintenance. This phase runs parallel to the aforementioned phases, ensuring the system's enduring reliability.

[0071] The air knife 62 protects the surface of the anti-reflective glass 16. Throughout the entire production line operation, regardless of whether filming is being performed, the air-cooled air knives 62 on both sides operate continuously or intermittently. The airflow they blow out forms a continuous positive pressure air curtain barrier on the outer surface of the anti-reflective glass 16, actively blowing away and preventing contaminants such as rubber dust, oil mist, and water vapor from adhering to the surface of the anti-reflective glass 16.

[0072] The antireflective glass 16 acts as a physical barrier, completely isolating the internal precision optical components (camera, light source) from the harsh external environment. Furthermore, by coating the surface of the antireflective glass 16 with an antireflective film, the reflection on the glass surface can be reduced, thereby improving the imaging signal-to-noise ratio.

[0073] After the image capture and detection are completed, the first linear light source 2 and the second linear light source 3 are switched to standby low-power mode, and the camera image is transmitted to the processing unit for analysis. The system waits for the trigger signal from the next sensor 5 to begin a new detection cycle.

[0074] The air knife 62 operates continuously to ensure that its anti-reflective glass 16 remains clean whenever the system is triggered.

[0075] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. An angle-adjustable light source for tire shoulder detection, characterized in that: The device includes a housing (1), on one side of the housing (1) is a first linear light source (2), and on the other side is a second linear light source (3). The first linear light source (2) is tilted to illuminate one side of the tire shoulder, and the second linear light source (3) is tilted to illuminate the other side of the tire shoulder. At least one first camera (41) for collecting reflected light from the tire shoulder is installed between the first linear light source (2) and the second linear light source (3). A first angle adjustment component (31) is installed at both ends of the first linear light source (2) and the second linear light source (3). The first angle adjustment component (31) is used to adjust the tilt angle of the first linear light source (2) and the second linear light source (3) to precisely control the incident and reflection paths of the light. Dust removal components (6) are installed on both sides of the bottom of the housing (1). The dust removal components (6) are used to clean the bottom surface of the housing (1).

2. The adjustable light source for tire shoulder detection according to claim 1, characterized in that: The outer shell (1) includes an upper shell (11) mounted on the upper part, the upper shell (11) having a receiving chamber (13), the receiving chamber (13) having a first linear light source (2), a second linear light source (3) and a first camera (41) installed inside; end plates (14) are mounted on both sides of the upper shell (11), the first linear light source (2) and the second linear light source (3) being connected to the end plates (14) through a first angle adjustment component (31).

3. The adjustable light source for tire shoulder detection according to claim 2, characterized in that: The first angle adjustment component (31) includes a first arc-shaped groove (141) disposed on the end plate (14), and a second arc-shaped groove (142) disposed at the lower part of the first arc-shaped groove (141); the first arc-shaped groove (141) and the second arc-shaped groove (142) are used to adjust the tilt angle of the first linear light source (2) or the second linear light source (3); the first arc-shaped groove (141) is provided with a first angle scale (144); the first arc-shaped groove (141) and the second arc-shaped groove (142) are both equipped with a first adjusting bolt, one end of the first adjusting bolt passes through the first arc-shaped groove (141) and the second arc-shaped groove (142) and is bolted to the first linear light source (2) or the second linear light source (3).

4. The adjustable light source for tire shoulder detection according to claim 2, characterized in that: The accommodating chamber (13) is also equipped with a second camera (42) arranged in parallel with the first camera (41). The first camera (41) and the second camera (42) are arranged along the direction of the first linear light source (2) or the second linear light source (3). The first camera (41) and the second camera (42) are arranged facing each other inward. The first camera (41) is used to collect the reflected light from the front of the tire shoulder, and the second camera (42) is used to collect the reflected light from the rear of the tire shoulder.

5. The angle-adjustable light source for tire shoulder detection according to claim 4, characterized in that: A plurality of mounting profiles (43) are installed between the end plates (14). Mounting plates (44) are mounted on the mounting profiles (43). An L-shaped camera bracket (45) is mounted on the mounting plate (44). A first camera (41) or a second camera (42) is mounted on the L-shaped camera bracket (45). The L-shaped camera bracket (45) is also provided with a second angle adjustment component (32) for adjusting the angle of the first camera (41) and the second camera (42). The second angle adjustment component (32) includes a third arc-shaped groove provided on the L-shaped camera bracket (45). (46) and a fourth arc-shaped groove (48) installed on the upper part of the third arc-shaped groove (46), the third arc-shaped groove (46) and the fourth arc-shaped groove (48) are used to adjust the tilt angle of the first camera (41) or the second camera (42); the third arc-shaped groove (46) is provided with a second angle scale (47); the third arc-shaped groove (46) and the fourth arc-shaped groove (48) are both equipped with a second adjusting bolt, one end of the second adjusting bolt passes through the third arc-shaped groove (46) and the fourth arc-shaped groove (48) and is bolted to the mounting plate (44).

6. The angle-adjustable light source for tire shoulder detection according to claim 5, characterized in that: The upper housing (11) is U-shaped in general. The upper housing (11) includes an upper plate (111) installed on the upper part and side panels (112) installed on both sides of the upper plate (111). The side panels (112) are detachably connected to the end plate (14) by connecting bolts. The lower side panel (112) can be removed to adjust the tilt angle of the first camera (41) or the second camera (42).

7. The adjustable light source for tire shoulder detection according to claim 5, characterized in that: A sensor (5) is installed between the first camera (41) and the second camera (42). The sensor (5) is used to detect whether the tire is in place. The sensor (5) is bolted to the mounting plate (44) via a sensor fixing plate (51). The mounting plate (44) is provided with a U-shaped groove (52) for adjusting the longitudinal position of the sensor fixing plate (51).

8. The angle-adjustable light source for tire shoulder detection according to claim 2, characterized in that: The outer shell (1) also includes a lower fixing plate (12) installed at the bottom. The lower fixing plate (12), the upper shell (11) and the two side end plates (14) are used to seal the receiving chamber (13). The lower fixing plate (12) has a stepped groove (15) in the middle. Anti-reflective glass (16) is bonded inside the stepped groove (15). The light emitted downward from the first linear light source (2) and the second linear light source (3) passes through the anti-reflective glass (16) and illuminates the tire shoulder.

9. The angle-adjustable light source for tire shoulder detection according to claim 8, characterized in that: The dust removal assembly (6) is installed on both sides of the lower fixing plate (12) for cleaning the anti-reflective glass (16); the dust removal assembly (6) includes a mounting block (61) installed on one side of the lower fixing plate (12) and an air knife (62) installed on the mounting block (61); the air outlet of the air knife (62) is located on one side of the light-emitting surface of the anti-reflective glass (16); the mounting block (61) is provided with a third angle adjustment assembly (33) for adjusting the angle of the air knife (62), the third angle adjustment assembly (33) includes a fifth arc-shaped groove (63) provided on the mounting block (61) and a connecting hole (6) installed at the lower part of the fifth arc-shaped groove (63). 4) The fifth arc-shaped groove (63) is used to adjust the tilt angle of the air knife (62); the connecting hole (64) is used to connect with the air knife (62) and make the air knife (62) rotate around the connecting hole (64) to adjust the tilt angle of the air knife (62); the fifth arc-shaped groove (63) is equipped with a third adjusting bolt, one end of the third adjusting bolt passes through the fifth arc-shaped groove (63) and is bolted to the air knife (62); the air knife (62) is provided with several air inlet ports (65), the air inlet ports (65) are connected to the air source through the air pipe, the air pipe is provided with a solenoid valve, and the solenoid valve controls the opening of the air knife (62).

10. The angle-adjustable light source for tire shoulder detection according to claim 1, characterized in that: Both the first linear light source (2) and the second linear light source (3) include an external housing (21). The housing (21) has a first receiving groove (22) inside, and a PCB board (23) is installed inside the first receiving groove (22). LED beads (24) are mounted on the PCB board (23). A second receiving groove (25) is located above the first receiving groove (22), and a focusing rod (26) is installed inside the second receiving groove (25). A third receiving groove (27) is located above the second receiving groove (25), and a diffuser plate (28) is installed inside the third receiving groove (27). The diffuser plate (28) covers the housing (21) and is located in the light-emitting direction of the focusing rod (26); both ends of the housing (21) are equipped with end caps (29), which seal both ends of the housing (21) and limit the internal PCB board (23), focusing rod (26) and diffuser plate (28); the first linear light source (2) and the second linear light source (3) also include a power line (20), which passes through the end cap (29) and is electrically connected to the PCB board (23) to provide power to the LED beads (24) and drive the LED beads (24) to emit light.

Images