Glass container bottleneck defect detection device

Abstract

The utility model discloses a glass container bottleneck defect detection device and belongs to the technical field of glass container defect detection. Which comprises a support, a liftable lens is installed on the support, the lens faces downwards and directly faces a bottle opening of a bottle to be detected, and a camera is installed on the upper portion of the lens. The automatic bottle opening detection device is characterized in that a liftable lifting frame is arranged in the support, the lens is installed on the lifting frame, the lens is a zoom lens, and a focusing mechanism is further installed on the lifting frame; the focusing mechanism is connected with the focal length focusing end of the lens. According to the glass container bottleneck defect detection device, by arranging the focusing mechanism, the focal length of the lens is adjusted, so that the definition of an image acquired by the camera is higher, and the accuracy of subsequent bottleneck defect detection is improved. And in the light path system arranged in the lens, the function of reversely correcting the light path is realized through the reverse correction lens, and the function of correcting the light path is realized through the first correction lens and the second correction lens. And the chromatic aberration eliminating lens plays a role in eliminating chromatic aberration.

Description

Technical Field

[0001] The utility model relates to the technical field of glass container defect detection, in particular to a glass container bottle mouth defect detection device. Background Art

[0002] During the production process of glass bottles, due to various reasons such as production technology and production conditions, cracks, bubbles and other defects may appear on the glass bottle mouth. These defects not only affect the appearance of the product, but also cause safety hazards. Therefore, after the glass bottles are processed, the defects of the bottle mouth need to be detected and defective products need to be eliminated.

[0003] In the prior art, defect detection at the mouth of a glass bottle is generally achieved by image processing, that is, by collecting an image of the mouth of the bottle and uploading the image to a host computer, which recognizes the image to detect defects, such as: the technical solution recorded in the Chinese utility model patent with application number 202123255148.4, application date December 22, 2021, and patent name "Defect Detection Device", the technical solution recorded in the Chinese invention patent with application number 201911405732.8, application date December 31, 2019, and patent name "A Glass Bottle Defect Detection System", and the technical solution recorded in the Chinese invention patent with application number 201610156491.8, application date March 18, 2016, and patent name "Bottle Mouth Defect Detection Device and Method".

[0004] However, a common problem with existing technologies, including the above-mentioned technical solutions, is that the position of the lens is relatively fixed during detection, so that diagonal inaccuracies may easily occur during image acquisition, resulting in insufficient clarity of the acquired image, causing subsequent defect detection by the host computer. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to overcome the shortcomings of the existing technology and provide a glass container bottle mouth defect detection device which realizes the adjustment of the lens focal length by setting a focusing mechanism, so that the image acquired by the camera is clearer, thereby facilitating the subsequent accuracy of bottle mouth defect detection.

[0006] The technical solution adopted by the utility model to solve the technical problem is as follows: the glass container bottle mouth defect detection device includes a bracket, a liftable lens is installed on the bracket, the lens is downwardly facing the bottle mouth of the bottle to be inspected, and a camera is installed on the upper part of the lens. The utility model is characterized in that a liftable lifting frame is provided in the bracket, the lens is installed on the lifting frame, the lens is a zoom lens, and a focusing mechanism is also installed on the lifting frame, and the focusing mechanism is connected to the focal length focusing end of the lens.

[0007] Preferably, the focusing mechanism is a focusing motor installed at the front end of the lens, a focusing driving gear is installed on the motor shaft of the focusing motor, and the focusing driving gear is meshed with a focusing driven gear installed in the lens.

[0008] Preferably, an annular light source is provided between the lens and the bottle mouth of the bottle to be tested.

[0009] Preferably, an objective lens group and an eyepiece lens group are provided in the lens, the objective lens group and the eyepiece lens group are spaced apart, and the focusing mechanism is used to focus the distance between the eyepiece lens group and the objective lens group.

[0010] Preferably, the objective lens group includes an objective lens, a reverse correction lens and a second correction lens arranged in sequence from the bottom of the lens upward; the eyepiece lens group includes a first correction lens, a chromatic aberration elimination lens and an eyepiece arranged in sequence above the second correction lens.

[0011] Preferably, the eyepiece is a convex lens; the reverse corrective lens is a concave lens; the second corrective lens is a convex lens, the side facing the reverse corrective lens is a convex surface, and the side facing away from the reverse corrective lens is a flat surface; the second corrective lens and the first corrective lens are convex lenses; the chromatic aberration elimination lens is a cemented lens composed of a convex lens and a concave lens.

[0012] Preferably, a fixing block is provided on the inner side of the bracket, and a lifting motor for driving the lifting frame to move up and down is provided on the upper part of the fixing block.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In the glass container bottle mouth defect detection device, by setting a focusing mechanism, the focal length of the lens is adjusted, so that the image acquired by the camera is clearer and the accuracy of subsequent bottle mouth defect detection is improved.

[0015] In the optical path system arranged in the lens, the reverse correction lens realizes the reverse correction of the optical path, the first correction lens and the second correction lens realize the correction of the optical path, and the chromatic aberration elimination lens realizes the elimination of chromatic aberration. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an axonometric view of a device for detecting defects in the mouth of a glass container.

[0017] Figure 2 This is the left view of the glass container bottle mouth defect detection device.

[0018] Figure 3 This is a schematic diagram of the lens structure of a glass container bottle mouth defect detection device.

[0019] Figure 4Schematic diagram of the internal optical path system of the lens of the glass container bottle mouth defect detection device.

[0020] Figure 5 This is a schematic diagram of the glass container bottle mouth defect detection device.

[0021] Among them: 1. Lifting motor; 2. Camera; 3. Focusing motor; 4. Focusing driving gear; 5. Lens; 6. Base; 7. Bracket; 8. Lifting frame; 9. Track; 10. Fixing block; 11. Ring light source; 12. Bottle to be tested; 13. Camera fixing port; 14. Focusing driven gear; 15. Lens barrel; 16. Image sensor; 17. Eyepiece; 18. Chromatic aberration elimination lens; 19. First corrective lens; 20. Second corrective lens; 21. Reverse corrective lens; 22. Objective lens. DETAILED DESCRIPTION

[0022] Figures 1 to 5 This is the best embodiment of the present invention, Figures 1 to 5 The utility model is further described.

[0023] like Figure 1~Figure 2 As shown, a device for inspecting the finish of a glass container comprises a base 6, a bracket 7 disposed on the surface of the base 6, and a fixing block 10 disposed on the upper portion of the inner surface of the bracket 7. A lifting motor 1 is disposed on the upper surface of the fixing block 10, and a track 9 is disposed below the fixing block 10. A lifting frame 8 is mounted on the front end of the track 9. The track 9 is arranged vertically, and the lifting frame 8 is clamped to the surface of the track 9 and moves up and down along the track 9.

[0024] The motor shaft of the lifting motor 1 is vertically downward, and a lead screw (not shown in the figure) is coaxially fixed to the motor shaft of the lifting motor 1. The lead screw passes through the rear of the lifting frame 8 and is threadedly connected to the lifting frame 8. When the lifting frame 8 is clamped with the track 9, the track 9 serves to limit the rotation of the lifting frame 8. When the lifting motor 1 rotates, the lifting frame 8 is moved up and down by the lead screw.

[0025] A lens 5 is provided in the middle of the lifting frame 8, and a camera 2 is mounted on the top of the lens 5. The data port of the camera 2 is used to communicate with the host computer so that the images captured by the camera 2 can be uploaded. The lens 5 is implemented using a zoom lens commonly used in the field, such as the technical solution described in the Chinese invention patent with application number 202411454218.4, application date October 17, 2024, and patent name "A zoomable endoscope", or the lens focusing mechanism described in the technical solution of the Chinese invention patent with application number 202411744724.7, application date November 29, 2024, and patent name "Method, device and electronic device for adjusting the focal length of an optical machine lens". The specific zoom principle will not be repeated here.

[0026] Combine Figure 3 The lens 5 includes a barrel 15, the upper portion of which houses a focusing mechanism. A focus driven gear 14 is mounted externally to adjust the focal length of the lens 5. A threaded mounting hole 13 is located at the top of the lens 5, suitable for mounting a C-mount or CS-mount industrial camera, as is known in the art. The bottle 12 to be inspected is positioned below the lens 5. The optical system within the lens 5 captures an image of the bottle mouth, which is then captured by the camera 2 mounted atop the lens 5. A through hole is defined in the center of the base 6, through which the lens 5 passes. Driven by a conveyor mechanism (e.g., a conveyor belt), the bottles 12 pass sequentially beneath the lens 5, where their images are captured.

[0027] A focusing motor 3 is also provided on the surface of the lifting frame 8 . The motor shaft of the focusing motor 3 is vertically downward and is coaxially fixed with a focusing driving gear 4 after passing through the lifting frame 8 . The focusing driving gear 4 is engaged with the focusing driven gear 14 of the lens 5 .

[0028] like Figure 4 As shown, the optical path system arranged in the lens 5 includes an objective lens 22 arranged at the bottom of the lens barrel 15, and the effect of increasing the field of view is achieved by the objective lens 22. A reverse correction lens 21 is arranged on the upper part of the objective lens 22. The reverse correction lens 21 is a concave lens, and the reverse correction optical path is achieved by the reverse correction lens 21. A second correction lens 20 is arranged on the upper part of the reverse correction lens 21. The second correction lens 20 is a convex lens, and its side facing the reverse correction lens 21 is a convex surface, and the side facing away from the reverse correction lens 21 is a flat surface. The effect of correcting the optical path is achieved by the second correction lens 20. In the lens 5, the relative positions of the objective lens 22, the reverse correction lens 21 and the second correction lens 20 are relatively fixed, forming an objective lens group.

[0029] A first corrective lens 19 is disposed above the second corrective lens 20. The first corrective lens 19 is also a convex lens, and the first corrective lens 19 also corrects the optical path. Above the first corrective lens 19 is the chromatic aberration elimination lens 18. The chromatic aberration elimination lens 18 is a composite lens consisting of a convex lens and a concave lens bonded together. The chromatic aberration elimination lens 18 eliminates chromatic aberration. Above the chromatic aberration elimination lens 18 is the eyepiece 17, and above the eyepiece 17 is the image sensor 16 of the camera 2. In the lens 5, the relative positions of the first corrective lens 19, the chromatic aberration elimination lens 18, and the eyepiece 17 are relatively fixed, forming an eyepiece lens group. When adjusting the focal length, the distance between the eyepiece lens group and the objective lens group can be adjusted.

[0030] The specific working process and working principle are as follows:

[0031] like Figure 5 As shown, during actual image acquisition, an annular light source 11 is also provided, and the lens 5 is pointed downwardly toward the center hole of the annular light source 11. Driven by a conveyor mechanism (e.g., a conveyor belt), bottles 12 to be tested sequentially pass beneath the lens 5. When a bottle 12 to be tested moves directly below the lens 5, the lens 5 captures an image of the bottle mouth of the bottle 12. The captured image is reflected by the image sensor 16 of the camera 2, forming an image in the camera 2. The camera 2 then uploads the captured image to a host computer, which then determines defects.

[0032] When the image clarity is insufficient, the host computer sends a control signal to the focus motor 3, which controls the focus motor 3 to control the focus driving gear 4 to rotate, further driving the focus driven gear 14 to rotate, thereby achieving focus adjustment of the focal length of the lens 5 to meet the clarity requirement.

[0033] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation thereto. Any person skilled in the art may utilize the above disclosure to modify or remodel the present invention into equivalent embodiments. However, any simple modification, equivalent variation, or modification of the above embodiment that does not depart from the technical content of the present invention and is based on the technical essence of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. A device for detecting defects in the mouth of a glass container, comprising a support (7), a lens (5) being mounted on the support (7), the lens (5) being directed downwardly toward the mouth of a bottle (12) to be inspected, a camera (2) being mounted above the lens (5), and characterized in that: A lifting frame (8) that can be raised and lowered is provided in the bracket (7), and the lens (5) is mounted on the lifting frame (8). The lens (5) is a zoom lens. A focusing mechanism is also mounted on the lifting frame (8), and the focusing mechanism is connected to the focal length focusing end of the lens (5).

2. The glass container mouth defect detection device according to claim 1, characterized in that: The focusing mechanism is a focusing motor (3) installed at the front end of the lens (5), a focusing driving gear (4) is installed on the motor shaft of the focusing motor (3), and the focusing driving gear (4) is meshed with a focusing driven gear (14) installed in the lens (5).

3. The glass container mouth defect detection device according to claim 1, characterized in that: An annular light source (11) is also provided between the lens (5) and the bottle mouth of the bottle to be tested (12).

4. The glass container mouth defect detection device according to claim 1 or 2, characterized in that: An objective lens group and an eyepiece lens group are arranged in the lens (5), the objective lens group and the eyepiece lens group are arranged at intervals, and a focusing mechanism is used to focus the distance between the eyepiece lens group and the objective lens group.

5. The glass container mouth defect detection device according to claim 4, characterized in that: The objective lens group includes an objective lens (22), a reverse correction lens (21), and a second correction lens (20) which are sequentially arranged from the bottom of the lens (5) upward; the eyepiece lens group includes a first correction lens (19), a chromatic aberration elimination lens (18), and an eyepiece (17) which are sequentially arranged above the second correction lens (20).

6. The glass container mouth defect detection device according to claim 5, characterized in that: The eyepiece (17) is a convex lens; the reverse correction lens (21) is a concave lens; the second correction lens (20) is a convex lens, the side of which faces the reverse correction lens (21) is a convex surface, and the side facing away from the reverse correction lens (21) is a flat surface; the second correction lens (20) and the first correction lens (19) are convex lenses; the chromatic aberration elimination lens (18) is a cemented lens formed by bonding a convex lens and a concave lens.

7. The glass container mouth defect detection device according to claim 1, characterized in that: A fixed block (10) is provided on the inner side of the bracket (7), and a lifting motor (1) for driving the lifting frame (8) to move up and down is provided on the upper part of the fixed block (10).

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