A sheet panel window detection mechanism

Abstract

The utility model provides a kind of sheet panel window detection mechanism, including light source;The light source is used to irradiate on measured product;Camera, measured product is located between light source and camera, the camera is used to photograph the surface condition after measured product is irradiated by light source;Shielding component is equipped between the light source with the camera, opening is equipped on the shielding component, measured product is located at the opening position, and corresponding opening the plane range, the shielding component is used to shield the light around measured product, the device effectively prevents the problem that light source influences panel to cause luminance difference small to further affect flaw identification rate, greatly improves the detection efficiency and accuracy of panel flaw.

Description

Technical Field

[0001] This utility model relates to the field of panel inspection equipment, and more particularly to a thin-film panel window inspection mechanism. Background Technology

[0002] The glass panels of mobile phone screens need to be inspected. The inspection principle involves shining light onto the glass panel and then acquiring an image of the illuminated panel. High brightness can highlight imperfections and gaps on the screen surface, thus assessing screen quality. Most of this inspection process needs to be automated to improve efficiency. Currently, the method involves placing the phone's glass panel on a conveyor line and placing a light source on the panel. However, a single light source makes surface defects less noticeable, resulting in only a 70% recognition rate. Adding more light sources would be necessary. Figure 6 As shown, because multiple light sources illuminate both the panel and the front of the panel at the same time, the light difference is small, which affects the identification of defects. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model proposes a thin-film panel window detection mechanism, including...

[0004] Light source; the light source is used to illuminate the product being tested;

[0005] A camera is used to photograph the surface condition of the product under test after it is illuminated by the light source.

[0006] A shielding component is provided between the light source and the camera. The shielding component has an opening. The product under test is located at the opening and corresponds to the plane range of the opening. The shielding component is used to block the light around the product under test.

[0007] Preferably, the shading component includes a dark-colored baffle.

[0008] Preferably, the shielding component includes a housing, the light source is located inside the housing, and ventilation slots are provided around the housing.

[0009] Preferably, the light source includes multiple lamp bodies, which are located at the bottom, sides and top of the product being tested.

[0010] Preferably, the light source includes a fixing column, a clamping block is provided on the fixing column, a connecting plate is connected to the clamping block, and the lamp body is connected to the connecting plate.

[0011] Preferably, the camera is an area scan camera or a line scan camera.

[0012] Preferably, it also includes a clamping assembly for positioning the product. The clamping assembly includes a bracket, on which a motor is fixedly connected. At least one fixed plate is connected to the output end of the motor. The fixed plate has a slot. At least one clamping cylinder is provided on each side of the slot along its length. The output end of the clamping cylinder is provided with a locking block.

[0013] A method for testing sheet materials, comprising a testing mechanism, wherein the testing method includes:

[0014] The product under test is conveyed between the blocking mechanism and the camera, and the product under test is positioned within the plane of the opening, corresponding to the opening location.

[0015] Multiple light sources illuminate the opening from around it, and the light shines onto the product through the opening. The light around the opening is blocked by a blocking component.

[0016] The camera acquires image information of the surface of the product under test from the side that is being illuminated.

[0017] The thin panel window detection mechanism and method proposed in this utility model have the following beneficial effects: This device effectively prevents the light source from affecting the panel and causing small differences in brightness, which in turn affects the defect recognition rate, and greatly improves the detection efficiency and accuracy of panel defects. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the baffle in this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the housing of this utility model;

[0022] Figure 4 This is a schematic diagram of the clamping assembly of this utility model;

[0023] Figure 5 This is an enlarged view of the clamping cylinder of this utility model;

[0024] Figure 6 This is a schematic diagram of light rays with low recognition rate in existing technologies;

[0025] Figure 7 This is a schematic diagram of the light rays of this utility model;

[0026] Among them, 1. Light source; 11. Lamp body; 12. Fixing column; 13. Clamping block; 14. Connecting plate; 2. Camera; 3. Product under test; 41. Opening; 42. Baffle; 43. Box; 44. Ventilation slot; 5. Clamping assembly; 51. Bracket; 52. Motor; 53. Fixing plate; 54. Slot; 55. Clamping cylinder; 56. Locking block; 57. Slider; 58. Connecting shaft; 59. Spring. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] Example 1

[0029] like Figure 1 As shown, this utility model proposes a thin-film panel window detection mechanism, including...

[0030] Light source 1; the light source 1 is used to illuminate the product 3 under test;

[0031] Camera 2, the product under test 3 is located between light source 1 and camera 2. Camera 2 is used to capture the surface condition of product under test 3 after being illuminated by light source 1. In this embodiment, camera 2 can be an area scan camera or a line scan camera, and the type of camera is not limited.

[0032] A shielding component is provided between the light source 1 and the camera 2. The shielding component has an opening 41, and the product under test 3 is located at the opening 41, corresponding to the plane area where the opening 41 is located. The shielding component is used to block the light around the product under test 3, such as... Figure 2 As shown, the shielding component can be a baffle 42, which is vertically positioned between the product and the light source 1. The baffle 42 has an opening 41, the size of which is basically the same as that of the product to be tested, ensuring that the size of the product to be tested is within the range of the opening 41. When the light source 1 shines on the opening 41, the light passing through the opening 41 can effectively illuminate the product to be tested. Sufficient light passes through the product to be tested, that is, the light source 1 is arranged in a ring around the product. The light source 1 includes multiple sets of lamp bodies 11, which are located at the bottom, sides and top of the product to be tested 3, respectively.

[0033] When there are surface defects, they can be clearly identified after being captured by camera 2. In this case, by setting up a blocking component, the illumination area is limited to an opening 41, ensuring that the light captured by camera 2 is light that passes through the product surface and basically no light from the shooting side of the product under test. This makes the dark areas of defects more obvious and greatly improves the detection accuracy. It solves the problem that when multiple light sources 1 illuminate the product under test, the entire shooting surface of the product will have a lot of light, resulting in a small contrast in brightness at the defect location and thus a low recognition accuracy.

[0034] It should be noted that the surface of the board is non-reflective to prevent reflected light from affecting defect detection.

[0035] Of course, the shielding component is not limited to a single baffle 42; it can also be a housing 43, such as... Figure 3 As shown, the light source 1 is located inside the housing 43. The housing 43 has an opening 41, which is the same as the baffle 42 in the embodiment. The principle of the opening 41 will not be repeated here. However, the housing 43 is provided with ventilation slots 44 around its perimeter. This is mainly to reduce the temperature caused by internal light and to facilitate air circulation in the entire cleanroom FFU, ensuring that the cleanroom environment prevents airborne particles from affecting the detection accuracy.

[0036] To better stabilize the light source 1, the light source 1 includes a fixing post 12, a clamping block 13 is provided on the fixing post 12, a connecting plate 14 is connected to the clamping block 13, and the lamp body 11 is connected to the connecting plate 14. The camera 2 is an area scan camera 2 or a line scan camera 2.

[0037] A method for testing sheet materials, comprising a testing mechanism, wherein the testing method includes:

[0038] The product to be tested is conveyed between the blocking mechanism and the camera 2, and corresponding to the position of the opening 41, ensuring that the product to be tested is within the area of ​​the plane where the opening 41 is located; specifically, this is achieved through the clamping assembly 5, such as... Figure 4 , Figure 5 As shown, the clamping assembly 5 includes a bracket 51, which is fixed in front of the shielding assembly. A motor 52 is fixedly connected to the bracket 51, and at least one fixing plate 53 is connected to the output end of the motor 52. In this embodiment, two sets of fixing plates 53 are provided for positioning the product. The fixing plate 53 is provided with a slot 54, which is square and can be used to accommodate the product to be tested. At least one clamping cylinder 55 is provided on each side of the slot 54 along its length. For greater stability, at least one clamping cylinder 55 is provided on each side. The upper and lower sets of clamping cylinders 55 are rodless cylinders, which can be purchased from Wuxi Zhongqi Industrial Automation Technology Co., Ltd. A locking block 56 is connected to the slider 57 of the rodless cylinder via a connecting shaft 58. A spring 59 is fitted onto the connecting shaft 58, located between the locking block 56 and the slider 57. The locking block 56 has a V-shaped opening. The opposing locking blocks 56 extend and retract via the clamping cylinder 55, positioning the product to be tested through the V-shaped opening. The spring 59 provides cushioning for the clamped product, preventing damage to the panel. In use, after the product to be tested is placed in the clamping cylinder 55 position by the preceding gripping device, it is driven by the motor 52 to rotate to the opening 41 position.

[0039] like Figure 7As shown, multiple light sources 1 illuminate the opening 41 from around it. The light passes through the opening 41 and illuminates the product. The light around the opening 41 is blocked by a blocking component, ensuring that the light source 1 illuminates the product from the opening 41 without strong light at the product's edge. The camera 2 acquires the surface image information of the product 3 on the other side of the product being tested, thus ensuring that there is no strong light around the product when the camera 2 acquires the product image. This effectively guarantees the defect detection rate of the product surface, with an actual verification defect reading rate of 99%. After a single panel is inspected, it is driven by motor 52 to rotate to the other side. At this time, when the panel on the other side is inspected, a new panel is placed on the unloaded clamping device.

Claims

1. A thin-film panel window detection mechanism, characterized in that, include Light source; the light source is used to illuminate the product being tested; A camera is used to photograph the surface condition of the product under test after it is illuminated by the light source. The feature is that a blocking component is provided between the light source and the camera, the blocking component has an opening, the product under test is located at the opening position, and the corresponding plane range of the opening is used to block the light around the product under test.

2. The thin-film panel window detection mechanism according to claim 1, characterized in that, The shielding component includes a dark-colored baffle.

3. The thin-film panel window detection mechanism according to claim 1, characterized in that, The shielding assembly includes a housing, the light source is located inside the housing, and ventilation slots are provided around the housing.

4. The thin-film panel window detection mechanism according to claim 1 or 3, characterized in that, The light source includes multiple sets of lamp bodies, which are located at the bottom, sides and top of the product being tested.

5. The thin-film panel window detection mechanism according to claim 4, characterized in that, The light source includes a fixed column, a clamping block is provided on the fixed column, a connecting plate is connected to the clamping block, and the lamp body is connected to the connecting plate.

6. The thin-film panel window detection mechanism according to claim 1, characterized in that, The camera is either an area scan camera or a line scan camera.

7. The thin-film panel window detection mechanism according to claim 1, characterized in that, It also includes a clamping assembly for positioning the product. The clamping assembly includes a bracket, on which a motor is fixedly connected. At least one fixed plate is connected to the output end of the motor. The fixed plate has a slot. At least one clamping cylinder is provided on each side of the slot along its length. The output end of the clamping cylinder is provided with a locking block.

Images