Glass defect detection device
By designing a glass defect detection device including detection camera, detection light source and strobe controller, the existing detection methods are solved, and efficient and accurate detection of multiple defects is achieved, especially suitable for large-scale Size glass products.
Patent Information
- Application Number
- CN202420782584.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-04-16
AI Technical Summary
The existing glass defect detection methods rely on manual inspection, which are low efficiency and poor accuracy, and automated machine vision equipment is easily missed when detecting multiple defects, resulting in cumbersome, time-consuming and costly detection, especially for large-size glass products, it is difficult to fully inspect. .
A glass defect detection device is designed, including a machine, a rack, a detection camera, a detection light source, a strobe controller and a conveyor line. By detecting the unique position and angle settings of the camera, the first light source and the second light source, combined with the light source The time-sharing strobe alternately lights up, generates bright and dark field images for comprehensive comparison, enhances the contrast of defects, and realizes effective detection of multiple defects.
It realizes multiple inspections of a single work station, improves detection efficiency and accuracy, is suitable for multiple defect detection, reduces defect omissions and misjudgment, and is especially suitable for comprehensive inspection of large-size glass products.
Smart Images
Figure CN222506186U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of visual detection, in particular to a glass defect detection device. Background Art
[0002] Glass is used in many aspects of our lives, such as museum booths, shopping mall counters, office windows, etc. Glass has a good sense of transparency, no pollution, strong fashion, rich shapes and wide application. However, during transportation or processing, friction, bumps, punching, etc. may cause scratches, abrasions, slight edge collapse, pinholes and other problems on the glass surface, or due to environmental or operational reasons, oil stains, water stains and other dirt may appear. For the above defects that may exist in the glass, the traditional detection method is manual detection. This method has a low sampling rate, low accuracy, poor real-time performance, high labor intensity, and is greatly affected by manual experience and subjective factors. With the gradual replacement of manual labor by automated machine vision, the detection efficiency has been greatly improved. However, due to the wide variety of defects, a single visual device detection is prone to miss other types of defects. Therefore, different structures of equipment are used for different defects during detection, which makes the entire detection process cumbersome, time-consuming, and costly. Especially for large-sized glass products, it is easy to miss detection and cannot meet the needs of the market well. Utility Model Content
[0003] In view of the above, the utility model provides a glass defect detection device, which can not only detect conventional, small-sized glass products, but also cover the detection of various defects of large-sized glass products to meet market demand.
[0004] The utility model adopts the following technical scheme: a glass defect detection device, characterized in that: it includes a machine platform, a frame, a detection camera, a detection light source, a strobe controller and a conveyor line, the detection camera is arranged on the frame through a lifting module, the detection light source includes a first light source and a second light source, the strobe controller connects the detection camera, the first light source and the second light source, the detection camera is vertically arranged above the conveyor line, the first light source is inclined above the conveyor line, and the second light source is arranged below the conveyor line, parallel to the product conveying direction.
[0005] Furthermore, the frame is mounted on the machine platform, a support frame is arranged inside the frame, and the detection camera is arranged on the support frame through the lifting module.
[0006] Furthermore, the detection camera is a line scan camera, the first light source is cross line light, and the second light source is highlight line light.
[0007] Furthermore, the lifting module includes a lifting linear module, a mounting plate and a slide rail. The mounting plate is arranged on the support frame through the lifting linear module, and both ends of the mounting plate are adapted to be arranged on the slide rail through sliders.
[0008] Furthermore, there are multiple detection cameras, which are arranged at the same horizontal height on the mounting plate.
[0009] Furthermore, a vertical distance between the second light source and the detection plane is greater than a vertical distance between the first light source and the detection plane.
[0010] Furthermore, the conveyor line is a roller conveyor line, and a detection window is provided on the conveyor line corresponding to below the detection camera, and the second light source is located below the detection window.
[0011] Furthermore, the first light source is arranged on the frame through a connecting axis and is located below the detection camera.
[0012] The glass defect detection device of the utility model can obtain multiple detection presentation effects at a single station, with high detection efficiency and accuracy, and is applicable to many types of defect detection. Through the unique position and angle settings of the detection camera, the first light source and the second light source, and the time-sharing strobing and alternating lighting of the first light source and the second light source, the detection camera will generate a bright field image and a dark field image at the same position of the glass product. The contrast of the defects is enhanced by the comprehensive comparison of the two images. Compared with the product appearance image obtained under a single light source, it can more effectively detect or distinguish multiple types of defects, avoiding the omission or misjudgment of defects. For the bright field formed when the bottom highlighted second light source is on, the detection effect is more obvious mainly for defects such as dirt, tape marks, spots, broken edges, stains, etc. on the glass. For the dark field formed when the upper cross first light source is on, the detection effect is more obvious mainly for defects such as scratches, abrasions, slight broken edges, pinholes, etc. Moreover, the setting of multiple detection cameras in this application can cover a large size range of detection products to avoid missed detection. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is an overall schematic diagram of the glass defect detection device of the utility model.
[0014] Figure 2 It is a schematic diagram of the local structure of the utility model.
[0015] Figure 3 It is a schematic diagram of the position status of the detection camera and the detection light source in the utility model. DETAILED DESCRIPTION
[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0017] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "setting", "connection", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0018] like Figure 1-Figure 2 A glass defect detection device of this embodiment includes a machine platform 1, a frame 2, a detection camera 3, a detection light source, a strobe controller and a conveyor line 6. The detection camera 3 is set on the frame 2 through a lifting module. The frame 2 is mounted on the machine platform 1. A support frame 21 is set in the frame 2. Both ends of the support frame 21 are fixed on both sides of the inside of the frame 2, spanning the conveyor line 6 on the machine platform 2, and the detection camera 3 is set on the support frame 21 through the lifting module.
[0019] Furthermore, the lifting module includes a lifting linear module 22, a mounting plate 23 and a slide rail 24. The mounting plate 23 is arranged on the support frame 21 through the lifting linear module 22, and the two ends of the mounting plate 23 are adapted to be arranged on the slide rail 24 through sliders. There are multiple detection cameras 3, which are arranged on the mounting plate 23 at equal intervals. In this embodiment, 6 sets of 8k line scan cameras with matching lenses are arranged at the same horizontal height on the mounting plate 23. Driven by the lifting linear module 22, the lifting of the mounting plate 23 drives all the detection cameras 2 to adjust their height synchronously. In this embodiment, the detection width of the detection camera 3 is greater than the width of the detection product 100. If the width of the detection product 100 is large, multiple sets of cameras can cover the required size at all workstations, and single-workstation detection cameras need to have overlapping intersection areas.
[0020] refer to Figure 2-Figure 3, the detection camera 3 is a line scan camera, the first light source 4 is a cross line light, the second light source 5 is a highlight line light, the detection light source includes the first light source 4 and the second light source 5, and the strobe controller connects the detection camera 3, the first light source 4 and the second light source 5 to control the two to light up alternately. The first light source 4 is set on the frame 2 through the connecting shaft 25, located below the detection camera 3, the detection camera 3 is vertically set above the conveyor line 6, and the first light source 4 is tilted above the conveyor line 6, forming an angle a with the normal of the detection product conveyed on the conveyor line, a is adjustable from 0° to 70°, and the rotating shaft 25 is set on both sides of the inside of the frame 2 through the mounting seat 26, and also crosses the conveyor line 6 on the machine 2. The second light source 5 is set below the conveyor line and parallel to the product conveying direction. Among them, the vertical distance between the second light source 5 and the detection plane is greater than the vertical distance between the first light source 3 and the detection plane. Specifically, the vertical distance LWD1 between the first light source 3 and the detection plane is adjustable from 5 to 80 mm, the vertical distance LWD2 between the second light source 5 and the detection plane is adjustable from 15 to 100 mm, and the vertical distance WD between the detection camera 3 and the detection plane is 300 to 450 mm.
[0021] In this embodiment, the conveyor line 6 is preferably a roller conveyor line, and a detection window is provided on the conveyor line 6 below the corresponding detection camera 3, and the second light source 5 is provided on the machine platform below the detection window to avoid obstruction.
[0022] During inspection, the inspection product 100 is placed on the conveyor line 6 for transmission. When passing through the inspection camera 3 at a uniform speed, the inspection camera 3 scans and photographs the glass surface, and outputs multiple groups of signals at high speed and in a cycle. The light source strobe controller responds to the signal at high speed, and successively switches the first light source and the second light source on and off alternately. Due to the setting of the specific light source and the strobe camera, at the same position of the glass, the inspection camera 3 will generate a bright field image and a dark field image. The contrast of the defects is enhanced through the comprehensive comparison of the two images. Compared with a single field of view, more types of defects can be effectively detected. In the process of the inspection product 100 passing under the inspection camera 3 at a uniform speed, it will continuously scan to obtain multiple groups of signal receiving images, and all images will be spliced to obtain images of all defects on the glass.
[0023] In addition, the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of this specification should be based on the technical personnel in the relevant technical field. Although this specification has described the present invention in detail with reference to the above embodiments, ordinary technical personnel in the field should understand that the technical personnel in the relevant technical field can still modify or make equivalent substitutions to the present invention, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.
Claims
1. A glass defect detection device, characterized in that: It includes a machine platform, a frame, a detection camera, a detection light source, a strobe controller and a conveyor line. The detection camera is set on the frame through a lifting module. The detection light source includes a first light source and a second light source. The strobe controller connects the detection camera, the first light source and the second light source. The detection camera is vertically arranged above the conveyor line, the first light source is inclined above the conveyor line, and the second light source is arranged below the conveyor line and parallel to the product conveying direction.
2. The glass defect detection device according to claim 1, characterized in that: The frame is mounted on the platform, a support frame is arranged inside the frame, and the detection camera is arranged on the support frame through the lifting module.
3. The glass defect detection device according to claim 1 or 2, characterized in that: The detection camera is a line scan camera, the first light source is cross line light, and the second light source is highlight line light.
4. The glass defect detection device according to claim 2, characterized in that: The lifting module includes a lifting linear module, a mounting plate and a slide rail. The mounting plate is arranged on the support frame through the lifting linear module, and both ends of the mounting plate are adapted to be arranged on the slide rail through sliders.
5. The glass defect detection device according to claim 4, characterized in that: There are multiple detection cameras, which are arranged at the same level on the mounting plate.
6. The glass defect detection device according to claim 1, characterized in that: A vertical distance between the second light source and the detection plane is greater than a vertical distance between the first light source and the detection plane.
7. The glass defect detection device according to claim 1, characterized in that: The conveyor line is a roller conveyor line, and a detection window is arranged on the conveyor line corresponding to below the detection camera, and the second light source is located below the detection window.
8. The glass defect detection device according to claim 1, characterized in that: The first light source is arranged on the frame via a connecting shaft and is located below the detection camera.