Glass detection device
By using side lighting and light guide channel design, internal defects of the glass sheet are revealed, solving the problem of low efficiency of human eye detection in existing technologies and achieving efficient and accurate defect detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN DAJIANG FLUID TECH CO LTD
- Filing Date
- 2025-03-19
- Publication Date
- 2026-04-21
AI Technical Summary
In existing technologies, the inspection of raw glass sheets mainly relies on human visual observation, which makes it difficult to clearly display tiny impurities, bubbles, and scratches, resulting in low inspection efficiency and a high risk of missed detections.
By using side lighting from the glass sheet, light is reflected from inside the glass by the light-emitting unit. Combined with positioning components and light-shielding strips, a light guide channel is formed to reveal internal defects. A background plate is used to create contrast and reduce light interference.
It improves the clarity of the display of internal defects in the original glass sheet, reduces light interference, and achieves efficient and accurate defect detection.
Smart Images
Figure CN224152307U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of glass testing technology, and in particular to a glass testing device. Background Technology
[0002] Glass panels are widely used in the home appliance industry. Existing home appliances, such as induction cookers and microwave ovens, all rely on the use of glass panels. Glass panels are obtained by processing raw glass sheets (such as printing and tempering).
[0003] Since the quality of the raw glass sheet directly affects the quality of the glass panel product, the raw glass sheet needs to be inspected before production to remove defective sheets. Therefore, glass panels containing internal impurities or bubbles, as well as those with surface scratches, must be removed before production to ensure product quality. Currently, the inspection of raw glass sheets mainly involves illuminating the front or back of the sheet with light, and inspectors visually inspect the sheet to determine the presence of impurities, bubbles, or scratches. This method cannot clearly display tiny impurities, bubbles, and scratches in the raw glass sheet, requiring high visual inspection skills from the inspectors and easily leading to undetected defects. Therefore, we propose a new type of glass panel inspection device to solve the aforementioned technical problems. Utility Model Content
[0004] The purpose of this invention is to provide a glass testing device to solve the above-mentioned problems.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] A glass inspection device, comprising:
[0007] A light source fixing component, wherein the interior of the light source fixing component has a first space, and one side wall of the first space communicates with the exterior of the light source fixing component;
[0008] A light-emitting unit is disposed in the first space and is used to emit light and irradiate the outside of the light source fixing member;
[0009] A positioning component is used to position the glass sheet so that the side of the glass sheet is opposite to the first space, so that the light emitted by the light-emitting unit enters the interior of the glass sheet from the side of the glass sheet.
[0010] Preferably, it also includes a background plate, which is disposed on one side of the light source fixing member.
[0011] Preferably, the positioning component includes a support strip, which is disposed on the outer wall of the light source fixing member and located on one side of the first space, and the support strip is arranged along the length direction of the first space; the support strip protrudes from the outer wall of the light source fixing member.
[0012] Preferably, the positioning component further includes a light-shielding strip, which is disposed on the outer wall of the light source positioning component and located on the other side of the first space, and the light-shielding strip extends along the length direction of the first space; a light-guiding channel is formed between the light-shielding strip and the support strip, and the end of the support strip away from the light source fixing component protrudes from the end of the light-shielding strip away from the light source fixing component.
[0013] Preferably, a gap is left between the background panel and the first space.
[0014] Preferably, the height of the light guide channel is 1.5mm to 5mm.
[0015] Preferably, the support strip protrudes 2mm to 4mm beyond the light-shielding strip.
[0016] One embodiment of this utility model has the following beneficial effects:
[0017] 1. The light emitted by the light-emitting unit in the first space shines into the glass sheet from the side wall. Since the inner surface of the glass sheet can reflect light, the light shining into the glass sheet is continuously reflected within the glass sheet, making the glass sheet very transparent. However, when there are defects such as dust or bubbles inside the glass sheet, the light is continuously reflected inside the glass sheet. When the light is reflected onto the surface of the defects such as dust or bubbles, the surface of the defects will show a luminous visual effect, thus making the defects such as dust or bubbles inside the glass sheet very clearly visible.
[0018] 2. Since this utility model uses side lighting to inspect the glass sheet, it is not easily affected by other light sources when inspecting the glass sheet, thus making it easy to observe defects such as dust and bubbles inside the glass sheet. Attached Figure Description
[0019] The accompanying drawings further illustrate the present invention, but the content of the drawings does not constitute any limitation on the present invention.
[0020] Figure 1 This is a three-dimensional structural diagram of one embodiment of the present utility model;
[0021] Figure 2 This is a cross-sectional structural schematic diagram of one embodiment of the present invention;
[0022] Figure 3 yes Figure 2 Enlarged structural diagram at point A;
[0023] Figure 4 This is a three-dimensional structural diagram of a light source fixing component according to one embodiment of the present utility model;
[0024] In the attached diagram: 1-light source fixing component, 11-first space, 2-light-emitting unit, 3-positioning component, 31-bearing strip, 32-light-shielding strip, 4-background plate. Detailed Implementation
[0025] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.
[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0028] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.
[0029] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0030] This embodiment provides a glass inspection device, such as... Figure 1-4 As shown, it includes:
[0031] A light source fixing component 1 has a first space 11 inside, and one side wall of the first space 11 communicates with the outside of the light source fixing component 1.
[0032] Light-emitting unit 2 is disposed in the first space 11 and is used to emit light and irradiate the outside of the light source fixing member 1;
[0033] Positioning component 3 is used to position the glass sheet so that the side of the glass sheet is opposite to the first space 11, so that the light emitted by the light-emitting unit 2 enters the interior of the glass sheet from the side of the glass sheet.
[0034] The light-emitting unit 2 can be a light source such as an LED lamp, halogen lamp, energy-saving lamp, or incandescent lamp. The light-emitting unit 2 can have multiple identical or different light sources, and they are evenly or unevenly arranged within the first space 11. The light-emitting unit 2 emits light from the first space 11 towards the outside of the light source fixing member 1. When inspecting the glass sheet, the glass sheet is placed against the positioning member 3 so that the side of the glass sheet is close to and aligned with the first space 11. The light emitted by the light-emitting unit 2 within the first space 11 shines into the glass sheet from its sidewall. Because the inner surface of the glass sheet can reflect light, the light shining into the glass sheet is continuously reflected within the glass sheet, making the entire glass sheet very transparent. While the glass sheet is bright, when imperfections such as dust and bubbles exist inside, the light is constantly reflected within the glass sheet. When this light is reflected onto the surface of these imperfections, the surface of the dust and bubbles exhibits a luminous visual effect, making the imperfections inside the glass sheet very clearly visible. Furthermore, by placing the side of the glass sheet closer to the light-emitting unit 2 to increase the light intensity entering the glass sheet, the brightness of the surface of the dust and bubbles is higher when the light is reflected onto them. Therefore, not only are the imperfections inside the glass sheet more obvious, but they can also be easily distinguished from the dust on the surface of the glass sheet. Open; Because this utility model uses side lighting on the glass sheet for inspection, it is less susceptible to interference from other light sources, making it easy to observe defects such as dust and bubbles inside the glass sheet. Specifically, most current glass sheet inspections use either the front or back of the glass sheet (the front of the glass sheet refers to the side of the glass sheet closest to the observation point, and the other side is the back of the glass sheet). For the front lighting method, because the outer surface of the glass sheet is reflective, when light shines on the front of the glass sheet, some light is refracted and enters the glass sheet, while some light is reflected from the front of the glass sheet. The light reflected from the front of the glass sheet can greatly interfere with the inspection of the glass sheet. Therefore, it is necessary to constantly change the observation angle to find the defects inside the glass sheet. In this process, it is easy to miss the detection. Furthermore, because the dust adhering to the front of the glass sheet is illuminated by light, the surface of the dust will also have a luminous visual effect, which can be easily confused with the defects inside the glass sheet, thus easily leading to false detection. Similarly, when using the method of lighting from the back of the glass sheet, since the light can penetrate the glass sheet and shine on the front of the glass sheet, the observation of the glass sheet from the front will also be subject to great light interference, thus making it difficult to detect the defects inside the glass sheet.This invention cleverly solves the problem of light interference during the inspection process by shining light on the side of the glass sheet, making it easier to detect defects within the glass sheet.
[0035] Furthermore, it also includes a background plate 4, which is disposed on one side of the light source fixing member 1.
[0036] By setting the background plate 4, the defects inside the glass sheet can be clearly contrasted with the background plate 4 when the glass sheet is inspected, making the defects inside the glass sheet more prominent. As a preferred embodiment, the background plate 4 has a dark color, such as black, so that the defects inside the glass sheet can be clearly contrasted with the background plate, and the defects inside the glass sheet can be more easily detected.
[0037] Furthermore, the positioning component 3 includes a support strip 31, which is disposed on the outer wall of the light source fixing component 1 and located on one side of the first space 11, and the support strip 31 is arranged along the length direction of the first space 11; the support strip 31 protrudes from the outer wall of the light source fixing component 1.
[0038] The support strip 31 is used to position the glass sheet. During testing, the surface of the glass sheet is placed against the side of the support strip 31 facing the first space 11 so that at least part of the side of the glass sheet is aligned with the first space 11, thereby allowing the light source to illuminate the side of the glass sheet.
[0039] Furthermore, the positioning component 3 also includes a light-shielding strip 32, which is disposed on the outer wall of the light source positioning component and located on the other side of the first space 11, and the light-shielding strip 32 extends along the length direction of the first space 11; a light-guiding channel is formed between the light-shielding strip 32 and the support strip 31, and the end of the support strip 31 away from the light source fixing component 1 protrudes from the end of the light-shielding strip 32 away from the light source fixing component 1.
[0040] Since the light emitted by the light-emitting unit 2 is divergent, in order to prevent the light-emitting unit 2 from shining on the inspection operator or industrial vision inspection device, this utility model sets a light-shielding strip 32 to block the light. A light guide channel is formed between the light-shielding strip 32 and the support strip 31. Part of the light from the light-emitting unit 2 shines out through the light guide channel, while the rest of the light is blocked by the support strip 31 and the light-shielding strip 32, thereby preventing the light from the light source from interfering with the inspection of the glass sheet.
[0041] Furthermore, a gap is left between the background plate 4 and the first space 11.
[0042] When inspecting the original glass sheet, the original glass sheet does not contact the background plate 4; that is, the original glass sheet is suspended above the background plate 4. This creates a visual focus difference between the original glass sheet and the background plate 4. When the visual focus is on the original glass sheet, even if there is dust on the surface of the background plate 4, it will not cause false detection, thus avoiding interference from dust or other factors on the background plate 4. In addition, this also prevents dust on the surface of the background plate 4 from adhering to the surface of the original glass sheet during the inspection process.
[0043] Furthermore, the height of the light guide channel is 1.5mm to 5mm.
[0044] When the height of the light guide channel is less than 1.5mm, the light intensity illuminating the side of the glass substrate is reduced due to the narrow light guide channel, making it difficult to achieve the required detection effect. When the height of the light guide channel is greater than 5mm, the width of the light-shielding strip 32 needs to be increased so that the light-shielding strip 32 can play a light-shielding role. However, this will increase the distance between the side of the glass substrate and the light-emitting unit 2, which will also reduce the light intensity illuminating the side of the glass substrate and affect the detection effect.
[0045] Furthermore, the support strip 31 protrudes 2mm to 4mm beyond the light-shielding strip 32.
[0046] During testing, the support strip 31 serves to support the original glass sheet. The edge of the original glass sheet is supported by the portion of the support strip 31 that protrudes from the light-shielding strip 32. Of course, to achieve a better positioning effect, the side of the original glass sheet can rest against the side of the light-shielding strip 32. This will not obstruct the original glass sheet, but will also position it so that the side of the original glass sheet is aligned with the light guide channel. When the width of the support strip 31 protruding from the light-shielding strip 32 is less than 2mm, the area supporting the original glass sheet is too small, making it difficult to place the original glass sheet on the support strip 31 and easily breaking it. When the width of the support strip 31 protruding from the light-shielding strip 32 is greater than 4mm, the area of the original glass sheet obstructed by the support strip 31 is too large, affecting the testing effect of the original glass sheet.
[0047] A glass testing method, using the glass testing device described above, further includes the following steps:
[0048] Step A: Turn on the light-emitting unit 2 so that the light-emitting unit 2 emits light to the outside of the light source fixing part 1;
[0049] Step B: Take the glass sheet from the inspection area and place the edge of the glass sheet against the positioning member 3 so that the side of the glass sheet is aligned with the first space 11.
[0050] Step C: Inspect the interior of the original glass sheet for defects.
[0051] If there are internal defects in the glass sheet, the glass sheet will be placed in the defective product area.
[0052] If the glass sheet is free of internal defects, it is placed in the good product area.
[0053] Repeat steps B and C.
[0054] When inspecting the glass sheet, the glass sheet is placed against the positioning component 3 by hand or robotic arm so that the side of the glass sheet is close to and aligned with the first space 11. The light emitted by the light-emitting unit 2 in the first space 11 shines into the glass sheet from the side wall. Since the inner surface of the glass sheet can reflect light, the light shining into the glass sheet can be continuously reflected inside the glass sheet, making the glass sheet very clear. However, when there are defects such as dust or bubbles inside the glass sheet, the light is continuously reflected inside the glass sheet. When the light is reflected onto the surface of the dust, bubbles, or other defects, the surface of the defects will show a luminous visual effect, making the dust, bubbles, and other defects inside the glass sheet very clearly visible. Therefore, it is convenient to detect the defects inside the glass sheet, and then the glass sheets with defects are selected out. Then, the glass sheets are placed in the defective product area by hand or robotic arm. By performing steps B and C on each piece of glass in the inspection area, each piece of glass in the inspection area can be inspected separately, so that defective glass pieces can be selected one by one.
[0055] Furthermore, in step C, an industrial vision inspection device is used to inspect the glass sheet.
[0056] Because this invention illuminates the glass sheet by side lighting, it not only makes the defects in the glass sheet stand out, but also significantly reduces light interference during inspection. Therefore, industrial vision inspection devices can accurately detect defects in the glass sheet.
[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0058] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.
Claims
1. A glass inspection apparatus, characterized by, include: A light source fixing component, wherein the interior of the light source fixing component has a first space, and one side wall of the first space communicates with the exterior of the light source fixing component; A light-emitting unit is disposed in the first space and is used to emit light and irradiate the outside of the light source fixing member; A positioning component is used to position the glass sheet so that the side of the glass sheet is opposite to the first space, so that the light emitted by the light-emitting unit enters the interior of the glass sheet from the side of the glass sheet.
2. The glass detection apparatus according to claim 1, wherein It also includes a background plate, which is disposed on one side of the light source fixing component.
3. The glass detection apparatus of claim 1, wherein The positioning component includes a support strip, which is disposed on the outer wall of the light source fixing member and located on one side of the first space, and the support strip is arranged along the length direction of the first space; the support strip protrudes from the outer wall of the light source fixing member.
4. The glass detection apparatus according to claim 3, wherein The positioning component further includes a light-shielding strip, which is disposed on the outer wall of the light source positioning component and located on the other side of the first space, and the light-shielding strip extends along the length direction of the first space; a light-guiding channel is formed between the light-shielding strip and the support strip, and the end of the support strip away from the light source fixing component protrudes from the end of the light-shielding strip away from the light source fixing component.
5. The glass inspection apparatus of claim 2, wherein A gap is left between the background panel and the first space.
6. The glass inspection apparatus of claim 4, wherein The height of the light guide channel is 1.5mm to 5mm.
7. The glass inspection apparatus of claim 4, wherein The support strip protrudes 2mm to 4mm from the light-shielding strip.