Three-sided detection linear light source device

Abstract

The application provides a three-side detection linear light source device, which comprises a coaxial light source assembly, a first linear light source assembly and a second linear light source assembly; one side of the coaxial light source assembly is connected with the first linear light source assembly, and the other side of the coaxial light source assembly is connected with the second linear light source assembly; the coaxial light source assembly is provided with a coaxial light source window; when the coaxial light source of the coaxial light source assembly is turned on, the light of the coaxial light source irradiates the top surface area of the measured object and forms reflected light which is transmitted to an external line scanning camera through the coaxial light source window; when the linear light source of the first linear light source assembly or the second linear light source assembly is turned on, the light of the linear light source irradiates the side edge area of the measured object and forms reflected light which is transmitted to the external line scanning camera through the coaxial light source window. The top surface and two sides are covered by three-side light sources, the reflected light is transmitted in the same path, and the detection efficiency and uniformity are improved.

Description

Technical Field

[0001] This application relates to the field of optical detection technology, and in particular to a three-sided detection linear light source device. Background Technology

[0002] In existing technologies, optical detection light sources mostly use independently set coaxial light sources or linear light sources. Each light source is installed separately on the outer side of different surfaces of the workpiece under test. The switching and brightness are controlled by independent circuits, and the light rays are reflected to the corresponding surfaces after illuminating them and then distributed to the receiving paths.

[0003] Optical inspection light sources are mainly used in traditional surface inspection scenarios, such as measuring the appearance defects of electronic components and the flatness of metal sheets. They require switching between different light sources or triggering in stages to sequentially illuminate the top, left, and right sides of the surface, and then using a camera to collect images of each surface in stages to complete multi-face inspection.

[0004] However, existing optical inspection light sources still have drawbacks: they require step-by-step inspection, which is inefficient and makes it difficult to guarantee the accuracy of multi-face synchronous inspection; the reflected light paths of each light source are dispersed, reducing the image signal-to-noise ratio; and the equipment structure is complex and the cost is high. Utility Model Content

[0005] In view of the above problems, the present invention provides a three-sided detection linear light source device to overcome or at least partially solve the above problems.

[0006] To address the aforementioned problems, this utility model discloses a three-sided detection linear light source device, comprising a coaxial light source assembly, a first linear light source assembly, and a second linear light source assembly; one side of the coaxial light source assembly is connected to the first linear light source assembly, and the other side of the coaxial light source assembly is connected to the second linear light source assembly;

[0007] The coaxial light source assembly is provided with a coaxial light source viewing window;

[0008] When the coaxial light source of the coaxial light source assembly is turned on, the light from the coaxial light source illuminates the top surface area of ​​the test piece and forms reflected light that is transmitted to the external line scan camera through the viewing window of the coaxial light source.

[0009] When the linear light source of the first or second linear light source assembly is turned on, the light from the linear light source illuminates the side area of ​​the test object and forms reflected light that is transmitted to the external line scan camera through the coaxial light source window.

[0010] Preferably, it further includes a connecting plate and a cover plate; the cover plate includes a coaxial light source cover plate, a first cover plate, and a second cover plate; one end of the coaxial light source assembly is connected to the coaxial light source cover plate, one end of the first linear light source assembly is connected to the first cover plate, and one end of the second linear light source assembly is connected to the second cover plate; the coaxial light source cover plate, the first cover plate, and the second cover plate are all connected to the connecting plate.

[0011] Preferably, the connecting plate has an arc-shaped hole, the cover plate has a connecting shaft, and the connecting shaft of the cover plate is slidably connected to the arc-shaped hole of the connecting plate.

[0012] Preferably, the coaxial light source assembly includes, from the inside out, a coaxial light source diffuser plate, a coaxial light source beam splitter, a coaxial light source lamp plate, a coaxial light source thermal pad, and a coaxial light source housing; one end of each of the coaxial light source diffuser plate, coaxial light source beam splitter, coaxial light source lamp plate, coaxial light source thermal pad, and coaxial light source housing is connected to the coaxial light source cover plate.

[0013] Preferably, the coaxial light source diffuser plate and the coaxial light source beam splitter form an angle.

[0014] Preferably, the center of the coaxial light source window is aligned with the center of the coaxial light source beam splitter.

[0015] Preferably, the coaxial light source window is a coaxial light source window glass with two corresponding sides. The reflected light formed after the light from the coaxial light source or the linear light source illuminates the test object is transmitted to the external line scan camera through the coaxial light source window glass.

[0016] Preferably, the first linear light source assembly includes a first focusing column, a first lamp panel, a first grating sheet, and a first housing arranged sequentially from the inside out; one end of the first focusing column, the first lamp panel, the first grating sheet, and the first housing are all connected to the first cover plate.

[0017] Preferably, the second linear light source assembly includes a second focusing column, a second lamp panel, a second grating sheet, and a second housing arranged sequentially from the inside to the outside; one end of the second focusing column, the second lamp panel, the second grating sheet, and the second housing are all connected to the second cover plate.

[0018] Preferably, the coaxial light source panel is provided with a coaxial light source power line, the first light panel is provided with a first power line, and the second light panel is provided with a second power line.

[0019] This application has the following advantages:

[0020] In the embodiments of this application, addressing the problems of low efficiency and difficulty in ensuring the accuracy of multi-face synchronous detection in the prior art through step-by-step detection, this application provides a solution for achieving multi-face synchronous illumination through the coordinated action of a coaxial light source assembly, a first linear light source assembly, and a second linear light source assembly. Specifically, it includes a coaxial light source assembly, a first linear light source assembly, and a second linear light source assembly; one side of the coaxial light source assembly is connected to the first linear light source assembly, and the other side of the coaxial light source assembly is connected to the second linear light source assembly; the coaxial light source assembly is provided with a coaxial light source window; when the coaxial light source of the coaxial light source assembly is turned on, the light from the coaxial light source illuminates the top surface area of ​​the test object, and the reflected light is transmitted to an external linear scanning camera through the coaxial light source window; when the linear light source of the first or second linear light source assembly is turned on, the light from the linear light source illuminates the side area of ​​the test object, and the reflected light is transmitted to an external linear scanning camera through the coaxial light source window. By using a coordinated layout design of the coaxial light source assembly, the first linear light source assembly, and the second linear light source assembly, synchronous multi-face illumination of the top surface and two sides of the test piece is achieved. The reflected light from each surface is transmitted to the external line scan camera through the same coaxial light source window, eliminating the need to switch light sources or adjust the detection path step by step. This solves the problems of low efficiency and poor multi-face synchronization accuracy in the existing technology. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an exploded structural diagram of a three-sided detection linear light source device according to an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the structure of a three-sided detection linear light source device provided in an embodiment of this application;

[0024] Figure 3 This is a side sectional view of a three-sided detection linear light source device provided in an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of light illuminating a test piece using a three-sided linear light source device according to an embodiment of this application;

[0026] 1. Coaxial light source assembly; 11. Coaxial light source window; 111. Coaxial light source window glass; 12. Coaxial light source diffuser plate; 13. Coaxial light source beam splitter; 14. Coaxial light source lamp board; 141. Coaxial light source power cord; 15. Coaxial light source thermal pad; 16. Coaxial light source housing; 2. First linear light source assembly; 21. First focusing column; 22. First lamp board; 221. First power cord; 23. First grating sheet; 24. First housing; 3. Second linear light source assembly; 31. Second focusing column; 32. Second lamp board; 321. Second power cord; 33. Second grating sheet; 34. Second housing; 4. Connecting plate; 41. Arc-shaped hole; 5. Cover plate; 51. Coaxial light source cover plate; 52. First cover plate; 53. Second cover plate; 54. Connecting shaft. Detailed Implementation

[0027] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] The inventors discovered through analysis of existing technologies that step-by-step detection requires multiple positioning and triggering steps, which is time-consuming and makes it difficult to ensure the consistency of multi-face synchronous detection; the reflected light paths of each light source are separated, which can easily introduce ambient stray light or crosstalk between different light sources, reducing image contrast; and because the light sources are installed independently and controlled separately, the equipment needs to reserve multiple sets of installation space and wiring, resulting in a complex structure and high cost.

[0029] Reference Figure 1 This diagram shows an exploded view of a three-sided linear light source device according to the present invention. Specifically, it includes the following structure: a coaxial light source assembly 1, a first linear light source assembly 2, and a second linear light source assembly 3; one side of the coaxial light source assembly 1 is connected to the first linear light source assembly 2, and the other side of the coaxial light source assembly 1 is connected to the second linear light source assembly 3; the coaxial light source assembly 1 is provided with a coaxial light source window 11; when the coaxial light source of the coaxial light source assembly 1 is turned on, the light from the coaxial light source illuminates the top surface area of ​​the test object, and the reflected light is transmitted to an external linear scanning camera through the coaxial light source window 11; when the linear light source of the first linear light source assembly 2 or the second linear light source assembly 3 is turned on, the light from the linear light source illuminates the side area of ​​the test object, and the reflected light is transmitted to an external linear scanning camera through the coaxial light source window 11.

[0030] In this embodiment, addressing the issues of low efficiency and difficulty in ensuring the accuracy of multi-faceted synchronous detection in existing technologies, this application provides a solution for achieving multi-faceted synchronous illumination through the coordinated action of a coaxial light source assembly 1, a first linear light source assembly 2, and a second linear light source assembly 3. Specifically, the solution includes a coaxial light source assembly 1, a first linear light source assembly 2, and a second linear light source assembly 3. One side of the coaxial light source assembly 1 is connected to the first linear light source assembly 2, and the other side of the coaxial light source assembly 1 is connected to the second linear light source assembly 3. The coaxial light source assembly 1 is provided with a coaxial light source window 11. When the coaxial light source of the coaxial light source assembly 1 is activated, the light from the coaxial light source illuminates the top surface area of ​​the test object, and the reflected light is transmitted through the coaxial light source window 11 to an external linear scanning camera. When the linear light source of the first linear light source assembly 2 or the second linear light source assembly 3 is activated, the light from the linear light source illuminates the side area of ​​the test object, and the reflected light is transmitted through the coaxial light source window 11 to an external linear scanning camera. Through the coordinated layout design of the coaxial light source assembly 1, the first linear light source assembly 2, and the second linear light source assembly 3, synchronous multi-face illumination of the top surface and two sides of the test piece is achieved. The reflected light from each surface is transmitted to the external line scan camera through the same coaxial light source window 11, eliminating the need to switch light sources or adjust the detection path step by step. This solves the problems of low efficiency and poor multi-face synchronization accuracy in the prior art.

[0031] The following will further describe a three-sided detection linear light source device in this exemplary embodiment.

[0032] It should be noted that the coaxial light source assembly 1 is centered, with the first linear light source assembly 2 and the second linear light source assembly 3 connected to its two sides respectively, forming a three-sided light source collaborative structure; the coaxial light source window 11 serves as a common outlet for reflected light, ensuring that the reflected light from multiple light sources is uniformly transmitted to the external line scan camera.

[0033] As an example, connections between components can be made using bolts, snap-fit ​​fasteners, or adhesive bonding.

[0034] In one specific implementation, the components are connected by bolts. After pre-positioning with locating pins, the bolts are locked in place. The optical axes of each light source component must be strictly collinear. The center of the coaxial light source window 11 coincides with the central axis of the linear light source, ensuring that the reflected light paths on the top and sides are consistent and avoiding light refraction deviations at the window. Multi-light source collaborative illumination avoids step-by-step detection, and the reflected light is transmitted along the same path, improving detection efficiency and image synchronization.

[0035] In one embodiment of this application, a connecting plate 4 and a cover plate 5 are further included; the cover plate 5 includes a coaxial light source cover plate 51, a first cover plate 52, and a second cover plate 53; one end of the coaxial light source assembly 1 is connected to the coaxial light source cover plate 51, one end of the first linear light source assembly 2 is connected to the first cover plate 52, and one end of the second linear light source assembly 3 is connected to the second cover plate 53; the coaxial light source cover plate 51, the first cover plate 52, and the second cover plate 53 are all connected to the connecting plate 4.

[0036] It should be noted that the coaxial light source cover plate 51, the first cover plate 52 and the second cover plate 53 are used to cover the ends of the coaxial light source assembly 1, the first linear light source assembly 2 and the second linear light source assembly 3, respectively, and play a role in protection and structural support; the connecting plate 4 is a common mounting carrier for each cover plate 5, and the cover plate 5 and the light source assembly are quickly assembled through a unified interface.

[0037] As an example, the connecting plate 4 can be made of aluminum sheet.

[0038] In one specific implementation, the connecting plate 4 is made of a 3mm thick aluminum plate, with a 3.2mm diameter circular hole in the center and a chamfer of C1.2mm; two quarter-circle holes with a diameter of 3.2mm and an outer chamfer of C1.2mm are provided on each side; the connecting plate 4 is marked with graduations of 0, 22.5, 45, 67.5, and 90 degrees. The connecting plate 4 effectively protects the internal precision structure of the light source assembly, preventing damage from dust or external forces and extending the service life of the equipment.

[0039] Reference Figure 2 The diagram shows a structural schematic of a three-sided detection linear light source device according to the present invention. In one embodiment of the present application, the connecting plate 4 is provided with an arc-shaped hole 41, and the cover plate 5 is provided with a connecting shaft 54. The connecting shaft 54 ​​of the cover plate 5 is slidably connected to the arc-shaped hole 41 of the connecting plate 4.

[0040] It should be noted that arc-shaped holes 41 are opened at both ends of the connecting plate 4, and connecting shafts 54 that cooperate with the arc-shaped holes 41 are provided on the first cover plate 52 and the second cover plate 53. The angle of the first cover plate 52 and the second cover plate 53 can be finely adjusted by sliding through the shaft holes, thereby realizing the angle fine adjustment of the first linear light source assembly 2 and the second linear light source assembly 3 to adapt to the surface tilt angle of different test pieces.

[0041] As an example, the connecting shaft 54 ​​can be slid along with a screwdriver when adjusting the angle.

[0042] In one specific implementation, the angle is adjusted by loosening the connecting shaft 54 ​​with a screwdriver and sliding the connecting shaft 54. After adjustment, the connecting shaft 54 ​​is tightened with a screwdriver to lock the position, so as to ensure the stability of the angle and avoid loosening and displacement during the detection process. The sliding connecting shaft 54 ​​supports multi-angle adjustment, which can be compatible with the top surface and side irradiation requirements of test pieces of different shapes, thus improving the versatility of the equipment.

[0043] Reference Figure 3 The image shows a side sectional view of a three-sided detection linear light source device according to the present invention. In one embodiment of this application, the coaxial light source assembly 1 includes a coaxial light source diffuser plate 12, a coaxial light source beam splitter 13, a coaxial light source lamp plate 14, a coaxial light source heat-conducting pad 15, and a coaxial light source housing 16 arranged sequentially from the inside to the outside. One end of each of the coaxial light source diffuser plate 12, coaxial light source beam splitter 13, coaxial light source lamp plate 14, coaxial light source heat-conducting pad 15, and coaxial light source housing 16 is connected to the coaxial light source cover plate 51.

[0044] It should be noted that the coaxial light source diffuser plate 12 is made of transparent double-sided frosted plastic, and its shape is a rectangle with a length of 299.8 mm, a width of 26.8 mm, and a thickness of 3 mm. It is fitted into the grooves in the middle of the inner top and inner bottom surfaces of the coaxial light source housing 16, and its function is to uniformly distribute the light. The coaxial light source beam splitter 13 is made of high-performance optical glass, and its shape is a rectangle with a length of 299.8 mm, a width of 34.8 mm, and a thickness of 1 mm. Its surface is smooth, with an AR anti-reflection coating on the upper surface and a semi-transparent and semi-reflective coating on the lower surface. It is fitted into the grooves on the inner top and inner front sides of the coaxial light source housing 16, and its function is to guide the reflected light path. The coaxial light source lamp board 14 is a rectangular circuit board made of 1.0 mm thick aluminum-based plate. Its upper surface is evenly arranged with 5 rows and 63 columns of plug-in LED beads, and it is fitted into the slots in the inner bottom of the coaxial light source housing 16, and its function is to emit the light source. The coaxial light source thermal pad 15 is made of 2.8mm thick silicone thermally conductive material. It is rectangular in shape, 299mm long, 24mm wide, and 2.8mm thick, and its function is to dissipate heat from the coaxial light source panel 14. The coaxial light source housing 16 provides protection. The layers of the coaxial light source assembly 1 work together to achieve highly uniform illumination of the top surface area.

[0045] As an example, the coaxial light source housing 16 can be made of rectangular aluminum profile.

[0046] In one specific implementation, the coaxial light source housing 16 is made of rectangular aluminum profile and is the main frame component of the coaxial light source. The top of the coaxial light source housing 16 has a rectangular hole, and the outer side has a recessed square groove for installing the coaxial light source window glass 111. The sides are fixed with UV-curable adhesive. A 3.8mm hole is opened in the middle of the back for connecting the coaxial light source power cable 141. The left and right end faces each have four screw holes and an inner recessed groove for locking the coaxial light source cover plate 51. The inner top surface and inner front surface each have a groove for assembling the coaxial light source beam splitter 13 tilted at 45°. The middle of the inner top surface and the middle of the inner bottom surface each have a groove for assembling the coaxial light source diffuser plate 12. The inner rear end has a pair of rib structures for assembling the coaxial light source lamp plate 14 and the coaxial light source heat-conducting pad 15.

[0047] In one embodiment of this application, the coaxial light source diffuser plate 12 and the coaxial light source beam splitter 13 form an angle.

[0048] It should be noted that an angle is set between the diffuser and the beam splitter. By adjusting the angle, the direction of light reflection can be changed, ensuring that the light reflected from the top surface of the workpiece accurately enters the coaxial viewing window. The reflected light path is controllable, reducing energy loss and increasing the sensitivity of defect detection.

[0049] As an example, the included angle range can be selected from 30° to 60°, which can be adjusted by replacing shims of different angles; if the included angle is too small, the reflected light is prone to divergence, and if it is too large, it is prone to deviating from the viewing window.

[0050] In one specific implementation, when the included angle is designed to be 45°, the light reflected from the top surface of the test piece is scattered by the diffuser plate and then incident on the beam splitter at an incident angle of 45°. After reflection, it is perpendicularly incident on the viewing window, resulting in the shortest path and the least energy loss.

[0051] In one embodiment of this application, the center of the coaxial light source window 11 is aligned with the center of the coaxial light source beam splitter 13.

[0052] It should be noted that the purpose of center-aligning the coaxial light source window 11 and the coaxial light source beam splitter 13 is to ensure that the light reflected by the coaxial light source beam splitter 13 can accurately enter the window along a preset path, avoiding light refraction deviation or energy loss caused by center offset, and ensuring the stability of reflected light transmission.

[0053] In one embodiment of this application, the coaxial light source window 11 is a coaxial light source window glass 111 arranged on two sides. The reflected light formed after the light from the coaxial light source or the linear light source illuminates the test object is transmitted to an external line scan camera through the coaxial light source window glass 111.

[0054] It should be noted that the coaxial light source window 11 consists of two parallel coaxial light source window glass pieces 111, which together protect the internal optical components. At the same time, it allows the reflected light formed after the light from the coaxial light source or linear light source illuminates the test object to pass through the coaxial light source window glass 111 and then be transmitted to the external line scan camera. It balances protection and light transmission, and is free from dust contamination or condensation interference during long-term use, ensuring the stability of the detection.

[0055] As an example, the material of the coaxial light source window glass 111 can be high-performance optical glass.

[0056] In one specific implementation, the coaxial light source window glass 111 is made of high-performance optical glass and is rectangular in shape with a length of 287.5 mm, a width of 17.5 mm, and a thickness of 1 mm. The surface of the coaxial light source window glass 111 is smooth and coated with AR (Anti-Reflective) film on both sides. It is assembled in the square groove on the top surface of the coaxial light source housing 16 and fixed with UV-curable adhesive on the sides. The coaxial light source window glass 111 can provide images for the camera and prevent dust.

[0057] In one embodiment of this application, the first linear light source assembly 2 includes a first focusing column 21, a first lamp panel 22, a first grating sheet 23, and a first outer shell 24 arranged sequentially from the inside to the outside; one end of the first focusing column 21, the first lamp panel 22, the first grating sheet 23, and the first outer shell 24 are all connected to the first cover plate 52.

[0058] It should be noted that the first focusing column 21 is made of glass, cylindrical in shape, with an outer diameter of 12mm and a length of 284mm. Its smooth surface is mounted above the first lamp plate 22 and fixed by the arc-shaped groove of the first housing 24. Its function is to confine the 120° light emitted from the first lamp plate 22 to a 10° light, providing focused, high-brightness linear light spot illumination. The first lamp plate 22 is a rectangular circuit board made of a 1.0mm thick aluminum substrate, with 49 LED beads evenly arranged on its upper surface. It is mounted in the inner bottom slot of the first housing 24 and serves as a linear light source. The first grating sheet 23 is made of PET (polyethylene terephthalate) material, with an elliptical micro-optical structure processed on its surface. It is 2.0mm thick and mounted in the slot at the top of the first housing 24. When its light diffusion and spot concealment are almost in the same direction, it can eliminate the bright spots of the LED beads. The coordinated operation of each layer achieves high-brightness, uniform line illumination in the side areas. The line light source has sufficient and uniform brightness, and there are no dark spots in the side area illumination, resulting in high defect detection accuracy.

[0059] As an example, the first housing 24 may be made of a long strip of aluminum U-shaped profile.

[0060] In one specific implementation, the first outer shell 24 is made of a long strip of aluminum U-shaped profile and serves as the main frame component of the first linear light source. The bottom surface of the first outer shell 24 has three grooves, and each of the two sides has four grooves, serving both heat dissipation and aesthetic purposes. A circular hole is opened in the center of the bottom surface for threading the first power cable 221, with a copper buckle at the connection to prevent the power cable from being pulled. Each side of the outer shell has a pair of grooves for assembling the first lamp plate 22. Inside, in the middle, is a pair of arc-shaped grooves for assembling the first focusing column 21, whose focal point has been determined by optical design. The top surface inside has a pair of grooves for assembling the first grating sheet 23. Each of the left and right side surfaces has two holes with a diameter of 3.2 mm, with a 1.2 mm rounded corner on the outside of the holes for assembly and connection with the first cover plate 52. The first outer shell 24 provides protection. The layers of the first linear light source assembly 2 work together to achieve highly uniform illumination of the top surface area.

[0061] In one embodiment of this application, the second linear light source assembly 3 includes a second focusing column 31, a second lamp plate 32, a second grating sheet 33, and a second housing 34 arranged sequentially from the inside to the outside; one end of the second focusing column 31, the second lamp plate 32, the second grating sheet 33, and the second housing 34 are all connected to the second cover plate 53.

[0062] It should be noted that the second focusing column 31 is made of glass, cylindrical in shape, with an outer diameter of 12mm and a length of 284mm. Its smooth surface is mounted above the second lamp plate 32 and fixed by the arc-shaped groove of the second housing 34. Its function is to confine the 120° light emitted from the second lamp plate 32 to a 10° light, providing focused, high-brightness linear light spot illumination. The second lamp plate 32 is a rectangular circuit board made of a 1.0mm thick aluminum substrate, with two rows of 49 LED beads evenly arranged on its upper surface. It is mounted in the inner bottom slot of the second housing 34 and serves as the emitting line light source. The second grating sheet 33 is made of PET material, with an elliptical micro-optical structure processed on its surface. It is 2.0mm thick and mounted in the slot at the top of the second housing 34. When its light diffusion and spot concealment are almost in the same direction, it can eliminate bright spots from the LED beads. The second housing 34 serves as a protective layer. The second linear light source component 3 achieves highly uniform illumination of the top surface area through the coordinated efforts of each layer. The linear light source has sufficient and uniform brightness, and there are no dark spots in the side area illumination, resulting in high accuracy in defect detection.

[0063] As an example, the second housing 34 can be made of a long strip of aluminum U-shaped profile.

[0064] In one specific implementation, the second outer shell 34 is made of a long aluminum U-shaped profile and serves as the main frame component of the second linear light source. The bottom surface of the second outer shell 34 has three grooves, and each of the two sides has four grooves, serving both heat dissipation and aesthetic purposes. A circular hole is provided in the center of the bottom surface for the second power cable 321 to pass through. A copper buckle is provided at the connection between the circular hole and the second power cable 321 to prevent the second power cable 321 from being pulled. Each of the two sides of the second outer shell 34 has a pair of grooves for mounting the second lamp plate 32. A pair of arc grooves are provided in the middle of the interior for mounting the second focusing column 31. A pair of grooves are provided on the top surface of the interior for mounting the second grating sheet 33. Each of the left and right side surfaces has two holes with a diameter of 3.2 mm, and the outer corners of the holes are rounded by 1.2 mm for assembly and connection with the second cover plate 53.

[0065] The second linear light source assembly 3 is completely symmetrical to the first linear light source assembly 2 in structure, except that the installation direction is opposite. They correspond to the left and right sides of the test piece, respectively, to ensure that the illumination brightness on both sides is balanced, avoid false detection caused by one side being too dark or too exposed, and improve the consistency of multi-faceted detection.

[0066] In one embodiment of this application, the coaxial light source board 14 is provided with a coaxial light source power line 141, the first light board 22 is provided with a first power line 221, and the second light board 32 is provided with a second power line 321.

[0067] It should be noted that the coaxial light source panel 14, the first light source panel 22, and the second light source panel 32 are each equipped with independent power lines, supporting independent brightness adjustment of each light source to meet different illumination requirements of the top surface and the sides. The coaxial light source power lines 141, 221, and 321 are all cables, and their function is to transmit electrical energy to the coaxial light source panel 14, the first light source panel 22, and the second light source panel 32, respectively.

[0068] Reference Figure 4 The diagram shows a schematic of light illuminating the test piece using a three-sided linear light source device according to the present invention.

[0069] The coaxial light source window 11 is aligned with the center of the external linear scanning camera. The test piece moves sequentially from right to left. The light sources of the first linear light source assembly 2, the second linear light source assembly 3, and the coaxial light source assembly 1 can all be controlled independently. When the front end of the test piece moves to the center position of the coaxial light source window 11, the first linear light source assembly 2 is turned on, and the light from the linear light source illuminates the front end area of ​​the test piece, forming reflected light that is transmitted to the external linear scanning camera through the coaxial light source window 11. When the top surface of the test piece moves to the center position of the coaxial light source window 11, the coaxial light source of the coaxial light source assembly 1 is turned on, and the light from the coaxial light source illuminates the top surface area of ​​the test piece, forming reflected light that is transmitted to the external linear scanning camera through the coaxial light source window 11. When the end of the test piece moves to the center position of the coaxial light source window 11, the second linear light source assembly 3 is turned on, and the light from the linear light source illuminates the end area of ​​the test piece, forming reflected light that is transmitted to the external linear scanning camera through the coaxial light source window 11.

[0070] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0071] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0072] The above provides a detailed description of a three-sided detection linear light source device provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A three-sided detection linear light source device, characterized in that, It includes a coaxial light source assembly, a first linear light source assembly, and a second linear light source assembly; one side of the coaxial light source assembly is connected to the first linear light source assembly, and the other side of the coaxial light source assembly is connected to the second linear light source assembly; The coaxial light source assembly is provided with a coaxial light source viewing window; When the coaxial light source of the coaxial light source assembly is turned on, the light from the coaxial light source illuminates the top surface area of ​​the test piece and forms reflected light that is transmitted to the external line scan camera through the viewing window of the coaxial light source. When the linear light source of the first or second linear light source assembly is turned on, the light from the linear light source illuminates the side area of ​​the test object and forms reflected light that is transmitted to the external line scan camera through the coaxial light source window.

2. The three-sided detection linear light source device according to claim 1, characterized in that, It also includes a connecting plate and a cover plate; the cover plate includes a coaxial light source cover plate, a first cover plate, and a second cover plate; One end of the coaxial light source assembly is connected to the coaxial light source cover plate, one end of the first linear light source assembly is connected to the first cover plate, and one end of the second linear light source assembly is connected to the second cover plate; the coaxial light source cover plate, the first cover plate, and the second cover plate are all connected to the connecting plate.

3. The three-sided detection linear light source device according to claim 2, characterized in that, The connecting plate is provided with an arc-shaped hole, and the cover plate is provided with a connecting shaft. The connecting shaft of the cover plate is slidably connected to the arc-shaped hole of the connecting plate.

4. The three-sided detection linear light source device according to claim 2, characterized in that, The coaxial light source assembly includes, from the inside out, a coaxial light source diffuser plate, a coaxial light source beam splitter, a coaxial light source lamp plate, a coaxial light source thermal pad, and a coaxial light source housing; The coaxial light source diffuser plate, coaxial light source beam splitter, coaxial light source lamp plate, coaxial light source thermal pad, and one end of the coaxial light source housing are all connected to the coaxial light source cover plate.

5. The three-sided detection linear light source device according to claim 4, characterized in that, An angle is formed between the coaxial light source diffuser plate and the coaxial light source beam splitter.

6. The three-sided detection linear light source device according to claim 4, characterized in that, The center of the coaxial light source window is aligned with the center of the coaxial light source beam splitter.

7. The three-sided detection linear light source device according to claim 1, characterized in that, The coaxial light source window is a coaxial light source window glass with two corresponding sides. The reflected light formed after the light from the coaxial light source or the linear light source illuminates the test object is transmitted to the external line scan camera through the coaxial light source window glass.

8. The three-sided detection linear light source device according to claim 4, characterized in that, The first linear light source assembly includes a first focusing column, a first lamp panel, a first grating sheet, and a first outer shell arranged sequentially from the inside out; one end of the first focusing column, the first lamp panel, the first grating sheet, and the first outer shell are all connected to the first cover plate.

9. The three-sided detection linear light source device according to claim 8, characterized in that, The second linear light source assembly includes a second focusing column, a second lamp panel, a second grating sheet, and a second housing arranged sequentially from the inside out; one end of the second focusing column, the second lamp panel, the second grating sheet, and the second housing are all connected to the second cover plate.

10. The three-sided detection linear light source device according to claim 9, characterized in that, The coaxial light source board is equipped with a coaxial light source power line, the first light board is equipped with a first power line, and the second light board is equipped with a second power line.

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