Bottle body outer surface detection device
By using a parallel light source and a large dynamic range phase measurement device in conjunction with a host computer for 3D modeling, the problem of false detection in the inspection of the outer surface of glass bottles was solved, and high-precision defect detection was achieved.
Patent Information
- Application Number
- CN202520154314.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-22
AI Technical Summary
In existing technologies, decorative patterns on the outer surface of glass bottles can lead to false detections of defects. Conventional tools are difficult to measure effectively, and automated detection based on image processing is susceptible to lighting and shadows.
Using a parallel light source, a worktable, and a large dynamic range phase measurement device, the three-dimensional depth information of the bottle is obtained through reflected light phase detection, and combined with the host computer for three-dimensional modeling to improve detection accuracy.
It improves the accuracy of glass bottle defect detection, simplifies the measurement process, and enhances automation and detection efficiency.
Smart Images
Figure CN223827577U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to non -contact optical detection technical field, concretely relates to a bottle body outer surface detection device. BACKGROUND
[0002] In the wine industry, one of the important signs of brand image is the appearance of the glass bottle. The size and surface flaws of the glass bottle have an important influence on the appearance of the glass bottle, so it is of great significance to detect the size and surface flaws of the glass bottle. At present, the relevant detection in the wine industry mainly relies on manual work. Especially the glass bottle shape size detection, because the glass bottle often has various decorative patterns, and the shape is irregular, conventional tools such as vernier caliper, micrometer and the like are difficult to realize effective measurement. Although there are automatic detection means based on image processing, due to the decorative pattern texture on the surface of the glass bottle, the problem of illumination shadow is easy to cause, and defect mis-detection is easy to occur. CONTENT OF THE UTILITY MODEL
[0003] In order to overcome the problem of defect detection mis-detection caused by the decorative pattern on the surface of the existing glass bottle, the utility model provides a bottle body outer surface detection device.
[0004] The technical scheme adopted by the utility model to solve its technical problems is:
[0005] The bottle body outer surface detection device comprises a parallel light source, a workbench, a large dynamic range phase measurement device and an upper computer, the large dynamic range phase measurement device is signal connected with the upper computer, and the optical axis of the parallel light source and the optical axis of the large dynamic range phase measurement device form an acute angle, so that when the parallel light source lights the bottle body on the workbench, the reflected light can enter the large dynamic range phase measurement device.
[0006] The principle of the patent is that the reflected light phase will carry the three-dimensional depth information of the bottle body after the parallel light beam is reflected on the surface of the glass bottle, and the three-dimensional depth of the bottle body can be obtained by detecting the reflected light phase through the large dynamic range wavefront detection device.
[0007] In the present application, based on the phase detection, the bottle body outer surface of the glass bottle is modeled and detected, so as to improve the detection accuracy of the glass bottle defects.
[0008] In some embodiments, the workbench is a spin workbench.
[0009] In some embodiments, the included angle between the optical axis of the parallel light source and the optical axis of the large dynamic range phase measurement device is 22.5°±2.5°.
[0010] In some embodiments, the large dynamic range phase measurement device is a Hartmann wavefront sensor.
[0011] In some embodiments, the parallel light source is a laser parallel light source.
[0012] Further, the laser parallel light source has a central wavelength of 635 nm and an output beam line width within ±10 nm.
[0013] The present application has the following advantages:
[0014] The reflected light phase carries the three-dimensional depth information of the bottle body after the parallel light beam is reflected by the surface of the bottle, and the three-dimensional depth of the bottle body can be obtained by detecting the reflected light phase through the large dynamic range wavefront detection device, so that the detection accuracy of the bottle defect can be improved. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 A flowchart of a three-dimensional modeling method of a bottle body outer surface detection device provided for the present application is shown in the figure.
[0016] Figure 2 A process diagram of offline calibration of a bottle body outer surface detection device provided for the present application is shown in the figure.
[0017] Figure 3 A structure diagram of a bottle body outer surface detection device provided for the present application is shown in the figure. DETAILED DESCRIPTION
[0018] The present application will be further described below with reference to the accompanying drawings.
[0019] In order to make the purpose, technical scheme and advantages of the present application clearer and more apparent, the present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.
[0020] In combination with Figure 1 As shown in Figs. 1-3, the present application provides a bottle body outer surface detection device.
[0021] As shown in Figs. 1-3, the present application provides a bottle body outer surface detection device. Figure 1 As shown in Figs. 1-3, the present application provides a bottle body outer surface detection device. Figure 2 As shown in Figs. 1-3, the present application provides a bottle body outer surface detection device.
[0022] The bottle body outer surface three-dimensional modeling method comprises at least the following steps:
[0023] A. A parallel light source is used to light the side of the bottle body, so that the reflected light enters a large dynamic range phase measurement device, and the output result of the large dynamic range phase measurement device is processed by an upper computer to obtain a three-dimensional modeling of the bottle body outer surface in the field of view;
[0024] Specifically, the upper computer obtains a three-dimensional modeling of the bottle body outer surface in the field of view by restoring the phase measurement result.
[0025] B. Rotate the bottle body and repeat the above steps to model the entire outer surface of the bottle body in three dimensions.
[0026] Specifically, rotate the bottle body and repeat step A until the three-dimensional modeling of the entire outer surface of the bottle body is completed.
[0027] The principle of the present patent is that the reflected light phase after the parallel light beam passes through the bottle surface will carry the three-dimensional depth information of the bottle body. The three-dimensional depth of the bottle body can be obtained by detecting the reflected light phase through a large dynamic range wavefront detection device.
[0028] In step B, as a preferred embodiment, the bottle body can be rotated to the point where the part of the bottle body observed in the previous step A is just out of the field of view, thereby simplifying the modeling process.
[0029] In the present application, based on phase detection, the modeling and detection of the outer surface of the bottle body can improve the detection accuracy of bottle defects.
[0030] It is worth noting that the large dynamic range phase measurement device is a general technical term in the field, and has a clear meaning in the field of phase sensing and measurement technology. Figure 1 The wavefront measurement device in Figure 2 The large dynamic range wavefront measurement device in
[0031] In the present embodiment, before step A, the large dynamic range phase measurement device is calibrated offline using a parallel light source. The offline calibration further improves the detection accuracy.
[0032] Based on the above-mentioned three-dimensional modeling method of the outer surface of the bottle body, a detection method for the outer surface of the bottle body is provided, which uses the above-mentioned three-dimensional modeling method of the outer surface of the bottle body for detection.
[0033] Specifically, the following steps are included:
[0034] S1. First, use a standard bottle to obtain a three-dimensional model of the standard bottle by the three-dimensional modeling method of the outer surface of the bottle body;
[0035] S2. Then, obtain a three-dimensional model of the bottle to be tested by the three-dimensional modeling method of the outer surface of the bottle body;
[0036] S3. Compare the differences between the three-dimensional models of the bottle to be tested and the standard bottle, thereby detecting the outer surface of the bottle body.
[0037] Specifically, the present bottle body outer surface detection method can be used to detect surface three-dimensional defects such as defects and scratches.
[0038] As Figure 3As shown, the bottle body outer surface detection device in the embodiment comprises a parallel light source, a workbench, a large dynamic range phase measurement device and an upper computer, the large dynamic range phase measurement device is signal connected with the upper computer, and an optical axis of the parallel light source and an optical axis of the large dynamic range phase measurement device form an acute angle, so that when the parallel light source lights the bottle body on the workbench, the reflected light can enter the large dynamic range phase measurement device.
[0039] In the embodiment, the workbench is a spin workbench.
[0040] The workbench is arranged as above, facilitating rotation of the bottle body, improving the degree of automation, and being conducive to further improving detection precision and detection efficiency.
[0041] In the embodiment, the included angle between the optical axis of the parallel light source and the optical axis of the large dynamic range phase measurement device is 22.5°±2.5°.
[0042] The included angle is set as above, so that the field of view is taken into account and design is facilitated.
[0043] In practice, the center of the bottle and the center of the workbench are consistent, so that rotation of the bottle body is realized when the workbench spins; the intersection of the optical axis of the parallel light source and the optical axis of the large dynamic range phase measurement device is located on the central axis of the workbench.
[0044] In the embodiment, the large dynamic range phase measurement device is a Hartmann wavefront sensor, which is simple to operate and has low requirements on the environment.
[0045] In the embodiment, the parallel light source is a laser parallel light source.
[0046] Further, the central wavelength of the laser parallel light source is 635nm, and the output beam line width is within ±10nm.
[0047] The above only describes preferred embodiments of the utility model and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection range of the utility model.
Claims
1. A device for detecting the outer surface of a bottle, characterized in that, It includes a parallel light source, a worktable, a large dynamic range phase measurement device, and a host computer. The large dynamic range phase measurement device and the host computer are connected by a signal. The optical axis of the parallel light source and the optical axis of the large dynamic range phase measurement device form an acute angle, so that when the parallel light source illuminates the bottle on the worktable, the reflected light can enter the large dynamic range phase measurement device.
2. The bottle outer surface detection device as described in claim 1, characterized in that, The worktable is a spin worktable.
3. The bottle outer surface detection device as described in claim 1, characterized in that, The angle between the optical axis of the parallel light source and the optical axis of the large dynamic range phase measurement device is 22.5°±2.5°.
4. The bottle outer surface detection device as described in claim 1, characterized in that, The large dynamic range phase measurement device is a Hartmann wavefront sensor.
5. The bottle outer surface detection device as described in any one of claims 1-4, characterized in that, The parallel light source is a laser parallel light source.
6. The bottle outer surface detection device as described in claim 5, characterized in that, The center wavelength of the laser parallel light source is 635nm, and the linewidth of the output beam is within ±10nm.