Textile defect visual inspection device

Abstract

The utility model discloses a kind of textile defect visual inspection devices, comprising: shell, the shell includes connecting seat and the left lamp holder and right lamp holder symmetrically arranged in the left and right sides of connecting seat, the bottom between the left lamp holder and right lamp holder forms light outlet, connecting seat and the left lamp holder and right lamp holder form mounting space for installing camera between them;Mounting inner cavity is set in the left lamp holder and right lamp holder, three groups of light source modules are equipped on the mounting inner cavity of the left lamp holder and right lamp holder, the three groups of light source modules are set with different angles from top to bottom Inclined;Two groups of arc-shaped diffusion plates, the two groups of arc-shaped diffusion plates are respectively clamped in the front end of the mounting inner cavity of left lamp holder and right lamp holder, cover the three groups of light source modules.The utility model can realize super-wide seamless uniform illumination, with high mechanical stability and the transmission light source structure of being convenient for installation maintenance, to improve the accuracy and efficiency of textile defect detection.

Description

Technical Field

[0001] This utility model relates to the field of detection light source equipment technology, and in particular to a visual detection device for textile defects. Background Technology

[0002] In automated production in the textile industry, online detection of fabric appearance defects (such as holes, stains, unevenness, and foreign objects) based on machine vision is of crucial importance. Transmitted illumination (backlighting) is currently the preferred solution due to its high sensitivity to changes in fabric thickness and density, especially when combined with a high-resolution line scan camera to achieve high-speed, wide-area detection.

[0003] Existing technical defects: However, existing transmissive light source solutions have the following bottlenecks: (1) Insufficient uniformity of ultra-wide illumination: A single backlight is difficult to cover wide fabrics (commonly 1.5m to 3m or more), and splicing multiple light sources can easily cause sudden changes in brightness at the seams, resulting in characteristic strip-shaped artifacts in the line scan image, which seriously interferes with defect identification. (2) Poor structural stability: Mechanical splicing of independent light source modules poses a risk of displacement, and vibration and temperature rise can easily cause misalignment at the seams, requiring frequent calibration. (3) Unnatural light path transition: Traditional planar splicing light sources have discontinuous light scattering at the seams, making it difficult to achieve truly "seamless" illumination. (4) High maintenance costs: Independent installation and adjustment of multiple modules is cumbersome, significantly increasing downtime.

[0004] Therefore, there is an urgent need to develop a new detection device to overcome the above problems. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide a textile defect visual inspection device. This invention can achieve ultra-wide seamless uniform illumination, has a transmission light source structure with high mechanical stability and is easy to install and maintain, so as to improve the accuracy and efficiency of textile defect detection.

[0006] To achieve the above objectives, this utility model provides a visual inspection device for textile defects, comprising:

[0007] The housing includes a connecting base and a left lamp holder and a right lamp holder symmetrically arranged on the left and right sides of the connecting base. A light outlet is formed between the bottoms of the left lamp holder and the right lamp holder. The connecting base is located directly above the light outlet, and both ends of the connecting base are connected to the left lamp holder and the right lamp holder respectively. An installation space for mounting a camera is formed between the connecting base and the left lamp holder and the right lamp holder.

[0008] An installation cavity is provided in both the left and right lamp holders. Three sets of lamp source modules are installed in the installation cavities of both the left and right lamp holders. The three sets of lamp source modules are tilted at different angles from top to bottom, so that the illumination direction of each set of lamp source modules is towards the center of the light outlet.

[0009] Two sets of arc-shaped diffused plates are respectively snapped into the front end of the mounting cavity of the left lamp holder and the right lamp holder, covering the three sets of lamp source modules.

[0010] Furthermore, the three light source modules are designated as a first light source module, a second light source module, and a third light source module. Using the horizontal projection line as a reference, the angles between the first, second, and third light source modules and this horizontal projection line are θ1, θ2, and θ3, respectively, where θ1 < θ2 < θ3. By optimizing the light source module angles and the diffuser design, uniform light transition is achieved, eliminating splicing artifacts, improving image quality, and ensuring accurate defect identification. The integrated structural design enhances stability, reduces maintenance frequency, and improves detection efficiency.

[0011] Furthermore, θ1 is 45°, θ2 is 60°~65°, and θ3 is 75°~80°. Precise angle control ensures complete light coverage without blind spots. Combined with a high-transmittance diffuser, this effectively improves light uniformity, reduces energy consumption, extends service life, and further lowers long-term operating costs.

[0012] Furthermore, the distance between the first, second, and third light source modules is 1.5–2 cm. This distance design ensures that the light rays overlap, avoids blind spots, and improves detection accuracy.

[0013] Furthermore, a first mounting groove is provided on both the left and right lamp holders, and the arc-shaped diffuser plate is inserted into the first mounting groove. The first mounting groove adopts a snap-fit ​​design to ensure that the diffuser plate is firmly fixed and easy to replace quickly.

[0014] Furthermore, the radius of curvature of the arc-shaped diffuser plate is 60°~65°. Combined with the light source module, this creates uniform Lambertian radiation on the fabric surface, reducing specular reflection interference and improving the detection rate of low-contrast defects such as holes and fiber bundles.

[0015] Furthermore, the housing also includes two sets of left side plates and two sets of right side plates. The two sets of left side plates are respectively fixed to the front and rear ends of the left lamp holder, and the two sets of right side plates are respectively fixed to the front and rear ends of the right lamp holder. A first connecting post and a second connecting post extending upwards are respectively provided on the left and right side plates, and the first and second connecting posts are respectively connected to the connecting seat. By setting the left and right side plates, not only are the two sides of the mounting cavity sealed, but the overall structural rigidity is also enhanced, preventing external interference, ensuring stable operation of the optical system, and improving detection reliability. The first and second connecting posts ensure sufficient space for installing the camera, facilitating multi-angle shooting and capturing minute defects.

[0016] Furthermore, the housing also includes a front baffle and a rear baffle, which are fixedly connected to the through area between the left and right lamp holders. This forms a closed space, effectively isolating external light interference and ensuring a stable testing environment. The front and rear baffles are made of high-strength materials, enhancing overall protective performance, extending the equipment's service life, and improving long-term operational reliability.

[0017] Furthermore, the left and right lamp holders are bases made of metal heat-dissipating material, and both are equipped with heat-dissipating protrusions. These protrusions effectively increase the heat dissipation area, accelerate heat dissipation, prevent overheating of the lamp source, and ensure stable operation over extended periods. The heat-dissipating protrusion design balances aesthetics and practicality, further enhancing the overall performance of the equipment.

[0018] Furthermore, it also includes several cooling fans, which are fixed to the left and right lamp holders via heat dissipation columns. The heat dissipation columns are made of copper or brass. Adding fans evenly dissipates LED heat, avoiding inconsistent light decay caused by localized temperature rises and ensuring constant luminous efficacy. The optimized airflow path of the heat dissipation columns improves heat dissipation efficiency, extends lamp life, and further ensures the stability and accuracy of the detection system.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This invention employs a symmetrical left and right lamp holder to form a stable optical detection cavity, resulting in a compact structure and rational layout that effectively improves space utilization. Furthermore, the left and right lamp holders are made of copper, brass, or other metals with excellent thermal conductivity, ensuring rapid heat conduction, reducing heat buildup, and enhancing lamp source stability and lifespan. The symmetrical structure also facilitates modular replacement, reducing maintenance costs and enhancing the long-term reliability of the system.

[0021] Three sets of lamp source modules are installed from top to bottom in the mounting cavities of both the left and right lamp holders, with different angles and reasonable spacing. These modules form a precisely designed arc-shaped light source surface, ensuring that the light uniformly covers the detection area. This allows the light fields of the two independent light sources in the left and right lamp holders to naturally transition and merge at the seam, completely eliminating brightness abrupt changes and ensuring that the illumination uniformity of the wide fabric (especially in the direction of movement) is >95% (measured value), thus avoiding artifact stripes in the line scan image.

[0022] Furthermore, the use of a curved diffuser plate ensures that light forms uniform Lambertian radiation on the fabric surface, reducing specular reflection interference and improving the detection rate of low-contrast defects such as holes and fiber bundles. The curved diffuser plate is made of a high-transmittance material, ensuring soft and undistorted light, further optimizing image quality. Attached Figure Description

[0023] To more clearly illustrate the technology in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a textile defect visual inspection device according to this utility model;

[0025] Figure 2 yes Figure 1 A schematic diagram of the decomposition process;

[0026] Figure 3 yes Figure 1 A schematic cross-sectional view along line AA in the middle;

[0027] Figure 4 This is a structural schematic diagram of the left or right lamp holder of this utility model;

[0028] Figure 5 This is a structural schematic diagram of the left or right side plate of this utility model.

[0029] The diagram includes:

[0030] 1. Housing; 11. Connecting seat; 12. Left lamp holder; 121. Mounting cavity; 122. First mounting slot; 123. Heat dissipation protrusion; 13. Right lamp holder; 14. Light outlet; 15. Left side plate; 151. First connecting post; 152. Second mounting slot; 16. Right side plate; 161. Second connecting post; 17. Front baffle; 18. Rear baffle; 2. Arc-shaped diffuser plate; 3. Mounting space; 4. Through area; 5. Lamp source module; 51. First lamp source module; 52. Second lamp source module; 53. Third lamp source module; 6. Cooling fan; 61. Heat dissipation column. Detailed Implementation

[0031] The technology of this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments thereof. Based on this embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second", such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0034] like Figures 1 to 5 The present invention discloses a textile defect visual inspection device, including a housing 1 and an arc-shaped diffused plate 2.

[0035] like Figures 1 to 3 As shown, the housing 1 includes a connecting seat 11 and a left lamp holder 12 and a right lamp holder 13 symmetrically arranged on the left and right sides of the connecting seat 11. In this embodiment, the left lamp holder 12 and the right lamp holder 13 are both arc-shaped, which facilitates the uniform distribution of light sources and enhances the lighting effect. The connecting seat 11 is positioned above the left lamp holder 12 and the right lamp holder 13, so that the left lamp holder 12 and the right lamp holder 13 form a structure with a cross-section close to a semi-circle after being spliced ​​together. A light outlet 14 is formed between the bottom of the left lamp holder 12 and the right lamp holder 13. The connecting seat 11 is positioned directly above the light outlet 14, and both ends of the connecting seat 11 are connected to the left lamp holder 12 and the right lamp holder 13, respectively. Furthermore, in this embodiment, the housing 1 also includes two sets of left side plates 15 and two sets of right side plates 16. The two sets of left side plates 15 are respectively fixed to the front and rear ends of the left lamp holder 12, and the two sets of right side plates 16 are respectively fixed to the front and rear ends of the right lamp holder 13. A first connecting post 151 and a second connecting post 161 extending upward are respectively provided on the left side plate 15 and the right side plate 16. The first connecting post 151 and the second connecting post 161 are respectively connected to the connecting seat 11. Thus, the first connecting post 151 and the second connecting post 161 form an installation space 3 between the connecting seat 11 and the left lamp holder 12 and the right lamp holder 13. This installation space 3 is used to install the camera, which allows the camera to flexibly adjust its angle within the housing 1 and increase the shooting range.

[0036] Since the left lamp holder 12 and the right lamp holder 13 are symmetrically separated, the area 4 between them is a through region, which is easily affected by external light interference. Therefore, in this embodiment, the housing 1 also includes a front baffle 17 and a rear baffle 18. The front baffle 17 and the rear baffle 18 are fixed to the through region 4 between the left lamp holder 12 and the right lamp holder 13, forming a four-sided enclosed space between the left lamp holder 12 and the right lamp holder 13, effectively isolating external light interference and ensuring a stable testing environment. The front baffle 17 and the rear baffle 18 are made of high-strength materials, enhancing the overall protective performance, extending the service life of the equipment, and improving the reliability of long-term operation.

[0037] like Figure 3 and Figure 4 As shown, in this embodiment, an installation cavity 121 is provided in both the left lamp holder 12 and the right lamp holder 13. Three sets of lamp source modules 5 are installed in the installation cavities 121 of both the left and right lamp holders 12 and 13. It should be noted that the left and right lamp holders 12 and 13, as well as the various components and their structural configurations, are identical. Therefore, only one will be described below. In this embodiment, the three sets of lamp source modules 5 are the first lamp source module 51, the second lamp source module 52, and the third lamp source module 53, which are tilted at different angles from top to bottom, so that each set of lamp source modules 5... The illumination direction is towards the center of the light outlet 14. Specifically, the first light source module 51 is located at the upper end of the mounting cavity 121, the second light source module 52 is in the center, and the third light source module 53 is located at the lower end. With the horizontal projection line as the reference, the angles between the first light source module 51, the second light source module 52, and the third light source module 53 and the horizontal projection line are θ1, θ2, and θ3, respectively, where θ1 < θ2 < θ3. By optimizing the angle of the light source module 5 and the design of the diffuser plate, uniform light transition is achieved, splicing artifacts are eliminated, image quality is improved, and accurate defect identification is ensured. Preferably, θ1 is 45°, θ2 is 60°~65°, and θ3 is 75°~80°. That is, θ2 can be 60°, 60.5°, 61°, 61.5°, 62°, 62.5°, 63°, 63.5°, 64°, 64.5°, or 65°, and θ3 can be 75°, 75.5°, 76°, 76.5°, 77°, 77.5°, 78°, 78.5°, 79°, 79.5°, 79.8°, or 80°, to ensure that the light from each angle is complementary, forming illumination without blind spots and improving detection accuracy.

[0038] To further ensure cross-coverage of light, avoid blind spots, and improve detection accuracy, the distance between the first light source module 51, the second light source module 52, and the third light source module 53 is 1.5 to 2 cm. The distance between each pair of the three light source modules 5 can be controlled to 1.5 cm, 1.6 cm, 1.7 cm, 1.8 cm, 1.9 cm, or 2.0 cm, depending on the actual situation.

[0039] like Figure 2 , Figure 4 and Figure 5 As shown, in this embodiment, two sets of arc-shaped diffuser plates 2 are provided. The two sets of arc-shaped diffuser plates 2 are respectively snapped into the front end of the mounting cavity 121 of the left lamp holder 12 and the right lamp holder 13, covering three sets of lamp source modules 5. Specifically, a first mounting groove 122 is provided on both the left lamp holder 12 and the right lamp holder 13, and a second mounting groove 152 that cooperates with the first mounting groove 122 is also provided on the left side plate 15 and the right side plate 16. During assembly, the arc-shaped diffuser plate 2 is directly inserted into the first mounting groove 122, and then the front and rear ends of the arc-shaped diffuser plate 2 are snapped into place by the second mounting groove 152 on the left side plate 15 and the right side plate 16 to realize the installation of the arc-shaped diffuser plate 2. The first mounting groove 122 and the second mounting groove 152 adopt a snap-fit ​​design to ensure that the diffuser plate is firmly fixed and easy to replace quickly.

[0040] As shown in the figure, in this embodiment, the concave surface of the arc-shaped diffuser plate 2 faces the light outlet 14. The radius of curvature of the arc-shaped diffuser plate 2 is 60°~65°, and can be selected as needed for 60°, 60.5°, 61°, 61.5°, 62°, 62.5°, 63°, 63.5°, 64°, 64.5°, or 65°. Combined with the lamp source module 5, it forms uniform Lambertian radiation on the fabric surface, reducing specular reflection interference and improving the detection rate of low-contrast defects such as holes and fiber bundles.

[0041] In this embodiment, the left lamp holder 12 and the right lamp holder 13 are bases made of metal heat dissipation materials, such as copper, brass, aluminum, copper alloy, or aluminum alloy. It is sufficient to ensure that the left lamp holder 12 and the right lamp holder 13 have good heat dissipation properties. Furthermore, heat dissipation protrusions 123 are provided on both the left lamp holder 12 and the right lamp holder 13. The heat dissipation protrusions 123 effectively increase the heat dissipation area, accelerate heat dissipation, prevent the lamp source from overheating, and ensure stable operation for a long time. The design of the heat dissipation protrusions 123 takes into account both aesthetics and practicality, further improving the overall performance of the equipment.

[0042] As a preferred embodiment, this embodiment also includes several cooling fans 6, which are fixed to the left lamp holder 12 and the right lamp holder 13 via heat dissipation columns 61. The heat dissipation columns 61 are made of materials such as copper, brass, aluminum, copper alloy, or aluminum alloy. Adding fans evenly dissipates the LED heat source, avoiding inconsistent light decay caused by localized temperature rises and ensuring constant luminous efficacy. The optimized airflow path design of the heat dissipation columns 61 improves heat dissipation efficiency, extends lamp life, and further ensures the stability and accuracy of the detection system.

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A visual inspection device for textile defects, characterized in that, include: The housing (1) includes a connecting base (11) and a left lamp holder (12) and a right lamp holder (13) symmetrically arranged on the left and right sides of the connecting base (11). A light outlet (14) is formed between the bottom of the left lamp holder (12) and the right lamp holder (13). The connecting base (11) is located directly above the light outlet (14), and both ends of the connecting base (11) are connected to the left lamp holder (12) and the right lamp holder (13) respectively. An installation space (3) for installing a camera is formed between the connecting base (11) and the left lamp holder (12) and the right lamp holder (13). An installation cavity (121) is provided in both the left lamp holder (12) and the right lamp holder (13). Three sets of lamp source modules (5) are installed in the installation cavities (121) of both the left lamp holder (12) and the right lamp holder (13). The three sets of lamp source modules (5) are tilted at different angles from top to bottom, so that the illumination direction of each set of lamp source modules (5) is towards the center of the light outlet (14). Two sets of arc-shaped diffused plates (2) are respectively snapped into the front end of the mounting cavity (121) of the left lamp holder (12) and the right lamp holder (13), covering the three sets of lamp source modules (5).

2. The textile defect visual inspection device according to claim 1, characterized in that, The three light source modules (5) are the first light source module (51), the second light source module (52) and the third light source module (53). With the horizontal projection line as the reference, the angles between the first light source module (51), the second light source module (52) and the third light source module (53) and the horizontal projection line are θ1, θ2 and θ3 respectively, wherein θ1 < θ2 < θ3.

3. The textile defect visual inspection device according to claim 2, characterized in that, θ1 is 45°, θ2 is 60°~65°, and θ3 is 75°~80°.

4. The textile defect visual inspection device according to claim 2, characterized in that, The distance between the first light source module (51), the second light source module (52) and the third light source module (53) is 1.5 to 2 cm.

5. The textile defect visual inspection device according to claim 1, characterized in that, A first mounting groove (122) is provided on both the left lamp holder (12) and the right lamp holder (13), and the arc-shaped diffuser plate (2) is inserted into the first mounting groove (122).

6. The textile defect visual inspection device according to claim 1, characterized in that, The radius of curvature of the arc-shaped diffuser plate (2) is 60°~65°.

7. The textile defect visual inspection device according to claim 1, characterized in that, The housing (1) also includes two sets of left side plates (15) and two sets of right side plates (16). The two sets of left side plates (15) are respectively fixed to the front and rear ends of the left lamp holder (12), and the two sets of right side plates (16) are respectively fixed to the front and rear ends of the right lamp holder (13). A first connecting post (151) and a second connecting post (161) extending upward are respectively provided on the left side plate (15) and the right side plate (16). The first connecting post (151) and the second connecting post (161) are respectively connected to the connecting seat (11).

8. The textile defect visual inspection device according to claim 1, characterized in that, The housing (1) also includes a front baffle (17) and a rear baffle (18), which are fixed to the through area (4) between the left lamp holder (12) and the right lamp holder (13).

9. A textile defect visual inspection device according to claim 1, characterized in that, The left lamp holder (12) and the right lamp holder (13) are bases made of metal heat dissipation material, and heat dissipation protrusions (123) are provided on both the left lamp holder (12) and the right lamp holder (13).

10. A textile defect visual inspection device according to claim 1, characterized in that, It also includes several cooling fans (6), which are fixed to the left lamp holder (12) and the right lamp holder (13) by means of a heat dissipation column (61), and the heat dissipation column (61) is made of copper or brass.

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