Multi-source array type textile uniform light color difference contrast device
By designing a multi-source array light source and a stable fixture structure, the problems of uneven illumination and sample instability in textile color difference comparison devices have been solved, thereby improving the accuracy and consistency of color difference comparison.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO KETAI INSPECTION CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-24
AI Technical Summary
In existing textile color difference comparison devices, the use of a single light source leads to uneven illumination, unstable sample fixation, and the influence of ambient light on the consistency of test results.
The design employs a multi-source array light source, combining a ring light source array, frosted acrylic plate, and microstructure diffusion film, along with a backplate and fixture structure, to ensure uniform illumination and sample stability.
It improves the uniformity of illumination, reduces local light spots and ambient light interference, and ensures the accuracy and consistency of color difference contrast.
Smart Images
Figure CN224553090U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of textile machinery technology, specifically, it relates to a multi-source array type textile uniform light color difference comparison device. Background Technology
[0002] In the field of textile quality inspection, color difference comparison is a core component for assessing color fastness and dyeing consistency, and its technological development directly impacts the market competitiveness of textiles. Currently, traditional color difference comparison devices typically employ a single light source (such as a spotlight or fluorescent lamp) combined with a simple sample holder, relying on visual comparison or basic photoelectric sensors to determine color differences. These devices, due to their simple structure and low cost, are widely used in incoming material inspection and production process monitoring in small and medium-sized textile factories, providing fundamental technical support for quality control in mass production of textiles and playing a crucial role in quality grading in industries such as apparel and home textiles.
[0003] However, directional illumination from a single light source can easily lead to obvious light spots on the sample surface. The difference in illumination between the overly bright central area and the darker edge area causes local color distortion in the same textile, especially for glossy fabrics such as velvet and satin, where specular reflection interference is more severe, directly affecting the accuracy of color difference judgment. Secondly, sample fixation often uses clamps for suspension, which can easily cause wrinkles due to uneven clamping position and force, resulting in instability in the observation area. Thirdly, the device structure is mostly a simple frame, lacking effective light-shielding design. The superposition of light from the textile and ambient light (such as natural light and indoor stray light) with the light source leads to dynamic changes in the lighting environment, resulting in poor consistency of comparison results for the same set of samples at different times. In summary, the existing technology has problems such as uneven light source illumination causing local light spots, easy morphological interference of samples, and the influence of ambient light on the test. Utility Model Content
[0004] In view of this, the present invention provides a multi-source array type textile uniform light color difference comparison device, which can solve the problems of uneven light source illumination causing local light spots, easy morphological interference of samples, and the influence of ambient light on the test.
[0005] This utility model is implemented as follows:
[0006] This utility model provides a multi-source array type textile uniform light color difference comparison device, including a base frame, an outer frame mounted on the base frame via a support baffle, and a clamp on the outer frame. The outer frame is formed by welding together longitudinal square steel on the left and right sides and transverse square steel on the upper and lower sides with a back plate. The longitudinal square steel on both sides is provided with through slots for textiles to pass through. A lamp plate is also provided above the base frame via an arched frame, and a light source array is arranged in a ring on the lamp plate. The longitudinal square steel is provided with protrusions for cooperating with the clamp.
[0007] The technical effects of the multi-source array type uniform light color difference comparison device for textiles provided by this utility model are as follows: By setting up a ring light source array to replace a single light source, the spatial complementarity of light is achieved through the ring distribution of multiple light sources, solving the problems of local over-brightness and edge darkening caused by direct illumination from a single light source; at the same time, the square steel welded outer frame, together with the back plate, allows the textile to directly contact the back plate, reducing the influence of light transmission and ensuring the accuracy of color comparison; the through grooves on both sides ensure that the observation area of the textile on the back plate is flat, reducing misjudgment of color difference caused by irregular sample shape; and the arched frame connects to the lamp plate to provide stable lighting conditions for color difference comparison.
[0008] Based on the above technical solution, the multi-source array type textile uniform light color difference comparison device of this utility model can be further improved as follows:
[0009] The light source array consists of 6-8 LED beads of the same power arranged in a ring, with each bead equipped with an independent focusing lens.
[0010] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the ring distribution allows light to cover the sample from multiple angles, reducing the shadow area; the setting of independent focusing lenses can concentrate the light from the lamp beads, reducing light energy loss, while avoiding edge light intensity attenuation caused by the divergence of light from a single lamp bead, further improving the uniformity of illumination, and ensuring that the difference in light intensity at any point on the sample surface is ≤5%.
[0011] Furthermore, a frosted acrylic plate and a microstructure diffusion film are arranged below the light source array. The surface of the diffusion film is covered with hemispherical protrusions, which are used to convert direct light into uniform diffused light.
[0012] The beneficial effects of the above-mentioned improved scheme are as follows: the frosted acrylic plate first scatters the direct light from the light source array, breaking the directionality of the light; then, the hemispherical protrusions of the microstructure diffusion film further disperse the light into multi-angle diffused light, completely eliminating the light spots formed by the direct light source. The diffused light can evenly cover the surface of textiles, especially suitable for textured or glossy fabrics (such as velvet and satin), avoiding local color distortion caused by surface reflection, allowing the true color of the textile to be presented, and improving the accuracy of color difference contrast.
[0013] Furthermore, the surface of the back panel is provided with a light-absorbing cotton layer, and the outer edge of the frame is provided with a light-shielding shell, the inner surface of which is also covered with a light-absorbing cotton layer.
[0014] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting up a light-absorbing cotton layer, the reflected light and stray light irradiated by the light source to the back plate can be absorbed, avoiding the superimposed light interference caused by the secondary irradiation of the sample by reflected light; the light-shielding shell is used to block external ambient light (such as indoor lighting and natural light), ensuring the accuracy of color difference comparison test; and the color "bleeding" problem caused by ambient light mixing and internal reflected light interference is effectively solved.
[0015] Furthermore, the thickness of the frosted acrylic sheet is 1.5-2mm.
[0016] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting the thickness to 1.5-2mm, sufficient structural strength can be ensured. If it is too thin (<1.5mm), it is easy to deform and the scattering effect is insufficient. If it is too thick (>2mm), it will excessively weaken the light intensity and result in insufficient brightness of the sample.
[0017] Furthermore, the thickness of the microstructured diffusion film is 0.8-1 mm.
[0018] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting a thickness of 0.8-1mm, light can be refracted 2-3 times in the film to form a uniform diffusion within a range of 60°, which ensures the angular range and intensity stability of the diffused light and further eliminates local light spots.
[0019] Furthermore, the diameter of the hemispherical protrusion is 45-50 μm.
[0020] Furthermore, the fixture is located on the outside of the through slot and includes a fixed seat, a stud, and a clamping plate. The top of the clamping plate is movably connected to the bottom of the stud via a seated bearing. The fixed seat is fixedly connected to the through slot, and a threaded hole is provided in the middle of the fixed seat for threaded engagement with the stud.
[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the threaded engagement between the stud and the fixed seat is used to adjust the clamping force of the clamping plate on the textile; and the clamp is set in the through slot position to achieve firm fixation of the beginning and end edges of the textile.
[0022] Furthermore, the fixing seats are respectively set on both sides of the through groove and fixed to the longitudinal square steel by bolts.
[0023] Furthermore, a knob is provided at the top of the stud.
[0024] The beneficial effect of adopting the above-mentioned improvement scheme is that the knob is set to facilitate the operator to rotate the stud.
[0025] Compared with existing technologies, the beneficial effects of the multi-source array type uniform light color difference comparison device for textiles provided by this utility model are as follows: by setting up a ring light source array to replace a single light source, the spatial complementarity of light is achieved through the ring distribution of multiple light sources, solving the problems of local over-brightness and edge darkening caused by direct illumination from a single light source; at the same time, the use of a square steel welded outer frame in conjunction with a back plate allows the textile to directly contact the back plate, reducing the influence of light transmission and ensuring the accuracy of color comparison; the through grooves on both sides ensure that the observation area of the textile on the back plate is flat, reducing misjudgment of color difference caused by irregular sample shape; and the arched frame connects to the lamp plate to provide stable lighting conditions for color difference comparison. Attached Figure Description
[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of a multi-source array-type textile uniform light color difference contrast device.
[0028] Figure 2 A plan view of the lamp disk structure of a multi-source array type textile uniform light color difference contrast device;
[0029] Figure 3 A schematic diagram of a multi-source array-type textile uniform color difference contrast device;
[0030] Figure 4 This is a schematic diagram of a second embodiment of a multi-source array type textile uniform light color difference contrast device;
[0031] The attached diagram lists the components represented by each number as follows:
[0032] 10. Base frame; 11. Support baffle; 12. Outer frame; 121. Longitudinal square steel; 122. Transverse square steel; 1221. Through groove; 123. Back plate; 13. Fixture; 131. Fixing base; 132. Clamping plate; 133. Stud; 14. Arch frame; 15. Lamp panel; 16. Light source array; 17. Condensing lens; 18. Frosted acrylic sheet; 19. Diffuser film; 20. Light-absorbing surface layer; 21. Light-shielding shell; 22. Slider; 23. Slide rail; 24. Boss. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0034] Example 1:
[0035] like Figure 1-3 The image shows a first embodiment of a multi-source array type textile uniform light color difference comparison device provided by this utility model. In this embodiment, it includes a base frame 10, and an outer frame 12 is installed on the base frame through a support baffle 11. A clamp 13 is provided on the outer frame. The outer frame is formed by welding together longitudinal square steel 121 on the left and right sides and transverse square steel 122 on the upper and lower sides with a back plate 123. Through slots 1221 for textiles to pass through are respectively opened on the longitudinal square steel on both sides. A lamp plate 15 is also provided above the base frame through an arched frame 14. A light source array 16 is arranged in a ring on the lamp plate. A boss for cooperating with the clamp is provided on the longitudinal square steel.
[0036] Preferably, the back plate is made of 2mm thick cold-rolled steel plate, which is fully welded to the square steel frame. The back plate surface is sprayed with gray matte paint and then a 5mm thick light-absorbing cotton layer is pasted on. The through groove is opened in the middle of the longitudinal square steel, and the edge of the groove is rounded. The lamp panel has an elliptical structure, and 6-8 mounting holes are evenly opened along the circumference of the bottom surface of the lamp panel for installing LED lamp beads.
[0037] In the above technical solution, the light source array is a ring array composed of 6-8 LED beads of the same power, and each LED bead is equipped with an independent focusing lens 17.
[0038] Preferably, the light source array consists of 8 LED beads with a color temperature of 6500K, and the focusing lens is made of acrylic material (focal length 15mm), which is fixed to the bead shell by an external clip.
[0039] Furthermore, in the above technical solution, a frosted acrylic plate 18 and a microstructure diffusion film 18 are provided below the light source array. The surface of the diffusion film is covered with hemispherical protrusions, which are used to convert direct light into uniform diffused light.
[0040] Preferably, the frosted acrylic sheet is clipped to the bottom of the lamp panel by the frame, 20mm from the bottom of the lamp bead; the microstructure diffusion film is bonded to the bottom of the frosted acrylic sheet by the adhesive layer, and the edges of the two are aligned.
[0041] Furthermore, in the above technical solution, the surface of the back panel is provided with a light-absorbing cotton layer 20, the outer edge of the frame is provided with a light-shielding shell 21, and the inner surface of the light-shielding shell is also provided with a light-absorbing cotton layer.
[0042] Preferably, the light-shielding shell is a rectangular baffle made of cold-rolled steel plate bent into shape, with 3mm thick light-absorbing cotton pasted on the inside.
[0043] Furthermore, in the above technical solution, the thickness of the frosted acrylic sheet is 1.5-2mm.
[0044] Preferably, the thickness of the frosted acrylic sheet is 2mm.
[0045] Furthermore, in the above technical solution, the thickness of the microstructure diffusion film is 0.8-1 mm.
[0046] Preferably, the thickness of the microstructure diffusion film is 1 mm.
[0047] Furthermore, in the above technical solution, the diameter of the hemispherical protrusion is 45-50μm.
[0048] Preferably, the diameter of the hemispherical protrusion is 50 μm.
[0049] Furthermore, in the above technical solution, the fixture is set on the outside of the through groove, including a fixed seat 131, a stud 133 and a clamping plate 132. The top of the clamping plate is movably connected to the bottom of the stud through a bearing with a seat. The fixed seat is fixedly connected to the through groove, and a screw hole is opened in the middle of the fixed seat for threaded engagement with the stud.
[0050] Furthermore, in the above technical solution, the fixing seats are respectively set on both sides of the through groove and fixedly installed with the longitudinal square steel by bolts.
[0051] Furthermore, in the above technical solution, a knob is provided at the top of the stud.
[0052] The beneficial effects of the above embodiments are as follows: by using 8 LED beads arranged in a ring, combined with a 15mm focal length focusing lens, the light is initially scattered by a frosted acrylic plate with a 20mm spacing, and then diffused again by a microstructure diffusion film, so that the light uniformity of the sample surface is increased to more than 95%, completely eliminating the local light spots caused by a single light source, and the brightness difference between different areas is ≤3%.
[0053] Example 2:
[0054] like Figure 4 As shown, the following improvements are made based on Embodiment 1: a slide rail 23 is opened on the longitudinal square steel, and the fixing seat of the clamp is slidably connected to the slide rail through the slider 22. The number of clamps on a single longitudinal square steel is greater than or equal to 3 sets.
[0055] In the above scheme, the slide is a T-shaped slide, and the slider is a matching T-shaped slider.
[0056] The above solution can further solve the problem that traditional clamps have fixed positions and are difficult to adapt to different widths or make adaptive adjustments according to textile specifications.
[0057] After the improvement, the T-shaped slider can slide along the slide rail to achieve arbitrary positioning of the clamp within the length of the through groove. The clamps with ≥3 sets on one side can clamp from multiple points simultaneously, which is especially suitable for wide fabrics or thin fabrics (such as silk) that are at risk of wrinkling. By applying force evenly at multiple points, local deformation is avoided, and the problem of uneven sample stretching caused by traditional single-point clamping is solved.
[0058] Furthermore, in the above scheme, pulleys are provided on both sides of the slider that contact the slide rail, and the slider makes sliding contact with the slide rail through the pulleys.
[0059] After the improvement, the sliding friction is converted into rolling friction by the pulleys on both sides of the slider, which reduces the resistance of the clamp movement by more than 60%. The operator can easily push the slider to the target position and there is no jamming during the sliding process.
[0060] Specifically, the principle of this invention is as follows: During use, the textile sample is inserted through a longitudinal square steel slot on one side and laid flat on the back plate. If it is at the beginning or end, it can be fixed flat by clamps to ensure the observation area is wrinkle-free. The lamp panel is turned on, and the ring-shaped LED light array emits light synchronously. The light is focused by a condenser lens, initially scattered by the frosted acrylic plate, and then diffused a second time by the microstructure diffusion film, transforming into uniform diffused light over a 60° range, covering the entire sample surface. The light-absorbing cotton layer inside the back plate and the light-shielding shell absorbs stray light and ambient light, forming a stable dark environment. The observer compares the color difference between the sample and the gray card through the observation area of the device. The ring light source eliminates single-source light spots, the diffused structure ensures uniform illumination, and the stable outer frame and clamps ensure the sample position is stable, thus achieving stable and efficient color difference comparison.
Claims
1. A multi-source array-type textile uniform light color difference comparison device, comprising a base frame, an outer frame mounted on the base frame via a support baffle, and clamps disposed on the outer frame, characterized in that, The outer frame is constructed by welding together longitudinal square steel on the left and right sides and transverse square steel on the top and bottom sides with a back plate. The longitudinal square steel on both sides is provided with slots for textiles to pass through. An arched frame is also provided above the base frame with a lamp plate. The lamp plate has a circular array of light sources. The longitudinal square steel is provided with protrusions for cooperating with the clamps.
2. The multi-source array type textile uniform light color difference comparison device according to claim 1, characterized in that, The light source array consists of 6-8 LED beads of the same power arranged in a ring, with each bead equipped with an independent focusing lens.
3. The multi-source array type textile uniform light color difference comparison device according to claim 2, characterized in that, Below the light source array are a frosted acrylic plate and a microstructured diffusion film. The surface of the diffusion film is covered with hemispherical protrusions, which are used to convert direct light into uniform diffused light.
4. The multi-source array type textile uniform light color difference comparison device according to claim 3, characterized in that, The back panel has a light-absorbing cotton layer on its surface, and a light-shielding shell is provided on the outer edge of the frame. The inner surface of the light-shielding shell is also covered with a light-absorbing cotton layer.
5. The multi-source array type textile uniform light color difference comparison device according to claim 4, characterized in that, The thickness of the frosted acrylic sheet is 1.5-2mm.
6. The multi-source array type textile uniform light color difference comparison device according to claim 5, characterized in that, The thickness of the microstructured diffusion film is 0.8-1 mm.
7. A multi-source array-type textile uniform light color difference comparison device according to claim 6, characterized in that, The diameter of the hemispherical protrusion is 45-50 μm.
8. A multi-source array-type textile uniform light color difference comparison device according to claim 7, characterized in that, The fixture is located on the outside of the through slot and includes a fixed seat, a stud, and a clamping plate. The top of the clamping plate is movably connected to the bottom of the stud via a bearing with a seat. The fixed seat is fixedly connected to the through slot, and a threaded hole is provided in the middle of the fixed seat for threaded engagement with the stud.
9. A multi-source array-type textile uniform light color difference comparison device according to claim 8, characterized in that, The mounting bases are respectively installed on both sides of the through groove and fixed to the longitudinal square steel with bolts.
10. A multi-source array-type textile uniform light color difference comparison device according to claim 9, characterized in that, A knob is provided at the top of the stud.