Mobile phone rear cover defect detection system and method
Through the cooperation of the camera and multiple shooting devices, the automatic detection of the mobile phone back cover is realized, the inefficiency and inaccuracy of manual detection is solved, and the accuracy and efficiency of detection is improved.
Patent Information
- Application Number
- CN202411510954.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2024-12-10
AI Technical Summary
The existing mobile phone back cover inspection mainly relies on manual inspection, and there are problems such as low sampling rate, low accuracy, poor real-time, low efficiency and high labor intensity, which are greatly affected by manual experience and subjective factors.
The camera is used to capture the defects of the back cover of the mobile phone, and the combination of the light and placement angle of the ring light shooting device, the strip light shooting device, the tilt shooting device and the line scanning shooting device are used to detect the captured pictures and filter them through the detection device. Flawed feature pictures are produced to realize automated detection.
It improves the accuracy and efficiency of detection, reduces the dependence of manual detection, and ensures the real-time and accuracy of detection.
Smart Images
Figure CN119104561A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of mobile phone back cover detection, and in particular to a mobile phone back cover defect detection system and method. Background Art
[0002] As an important part of the mobile phone, the mobile phone shell directly affects the overall quality of the device and the consumer's experience. However, the processing of mobile phone cover plates requires the coordination of multiple processes, and each process may cause defects such as scratches, collapsed edges, and indentations, which seriously affect the overall quality and reduce the use value; therefore, defect detection of mobile phone cover plates is particularly important in the production process.
[0003] In the production process of mobile phone back covers, due to the uncertainty of production process, the produced mobile phone back covers will have defects such as bumps, scratches, and discoloration. At present, the detection of surface defects of mobile phone back covers usually adopts manual detection method, which is the traditional detection method of surface defects of mobile phone back covers. This method has low sampling rate, low accuracy, poor real-time performance, low efficiency, high labor intensity, and is greatly affected by manual experience and subjective factors. Summary of the invention
[0004] In order to overcome the above-mentioned shortcomings of manual inspection such as low sampling rate, low accuracy, poor real-time performance, low efficiency, high labor intensity, and great influence of manual experience and subjective factors, the purpose of the present invention is to provide a mobile phone back cover defect detection system, which uses a camera to photograph the surface of the mobile phone back cover. When the camera takes a picture, if there are defects on the photographed surface of the mobile phone back cover, the defects on the surface of the mobile phone back cover are displayed in the picture through the coordination of the lights of the ring light shooting device, the dimming shooting device, the tilt shooting device, the line scan shooting device, the placement angle of the mobile phone back cover and the shooting angle of the camera. By using the detection device to detect the pictures taken by the camera, pictures with defective features are screened out, thereby screening defective mobile phone back covers, while ensuring the accuracy of the detection, greatly improving the detection efficiency.
[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: a mobile phone back cover defect detection system, comprising: A camera, the camera is used to take pictures of the back cover of the mobile phone; A detection device, the detection device is connected to the camera; A ring light camera device, the ring light camera device comprising a first light source and a second light source, the first light source and the second light source are in a circular ring shape, the first light source is arranged on the upper side of the back cover of the mobile phone to be detected, the second light source is arranged on the upper side of the first light source, the camera is arranged on the upper side of the second light source, and the back cover of the mobile phone to be detected is arranged parallel to the horizontal plane; A strip light shooting device, the strip light shooting device comprises a third light source, the third light source is a regular polygon, the third light source is arranged on the upper side of the back cover of the detected mobile phone, the camera is arranged on the upper side of the third light source, and the back cover of the detected mobile phone is arranged parallel to the horizontal plane; The tilted shooting device includes a fourth light source and a fifth light source, the fourth light source and the fifth light source are arranged at 90°, the fourth light source and the fifth light source are arranged at 45° to the horizontal plane, the fourth light source and the fifth light source are arranged on the upper side of the plane where the back cover of the detected mobile phone is placed, the fourth light source and the fifth light source are arranged on the same horizontal plane, the camera is arranged on the upper side of the back cover of the detected mobile phone, and the back cover of the detected mobile phone is arranged at 40° to the horizontal plane; The line scan shooting device includes a sixth light source, the sixth light source is set at 40-50 degrees to the horizontal plane, the camera is set at 40-50 degrees to the horizontal plane, and the back cover of the mobile phone to be inspected is set parallel to the horizontal plane.
[0006] In this technical solution, a camera takes a picture of the back cover of a mobile phone, and a detection device performs identification based on the picture taken by the camera, thereby identifying defects of the back cover of the mobile phone, a ring light shooting device is used to detect various defects in the camera installation area of the back cover of the mobile phone, a strip light shooting device is used to identify various defects at the plane of the back cover of the mobile phone, a tilt shooting device is used to detect various defects in the side edge area of the back cover of the mobile phone, and a line scan shooting device is used to detect surface bright print defects on the plane of the back cover of the mobile phone; the surface of the back cover of the mobile phone is photographed by using a camera, and when the camera takes a picture, if there are defects on the surface of the back cover of the mobile phone photographed, the defects on the surface of the back cover of the mobile phone are displayed in the picture through the coordination of the lights of the ring light shooting device, the dimming shooting device, the tilt shooting device, the line scan shooting device, the placement angle of the back cover of the mobile phone and the shooting angle of the camera, and the pictures taken by the camera are detected by the detection device, and pictures with defective features are screened out, thereby screening defective back covers of mobile phones, while ensuring the accuracy of detection, greatly improving the detection efficiency.
[0007] In some embodiments, the first light source includes four first arc-shaped light sources, and the second light source includes eight second arc-shaped light sources.
[0008] In this technical solution, the camera installation area on the back cover of the mobile phone is illuminated in sections by utilizing the first arc-shaped light source to form a first light source and the second arc-shaped light source to form a second light source, thereby displaying defects in the camera installation area on the back cover of the mobile phone.
[0009] In some embodiments, the ring light shooting device includes: four first arc-shaped light sources are lit up in sequence, and when the first arc-shaped light sources are lit up, the camera shoots four first pictures in sequence.
[0010] In this technical solution, the back cover of the mobile phone is photographed by using a camera when the first arc-shaped light source is turned on, so as to collect the defects of the camera installation area of the back cover of the mobile phone.
[0011] In some implementations, the detection device synthesizes the first image.
[0012] In this technical solution, the detection device synthesizes the first image to detect whether there are defects in the camera installation area of the back cover of the mobile phone under the illumination of the first light source.
[0013] In some embodiments, the ring light shooting device includes: eight second arc light sources are lit up in sequence, and when the second arc light sources are lit up, the camera shoots eight second pictures in sequence.
[0014] In this technical solution, the back cover of the mobile phone is photographed by using a camera when the second arc light source is turned on, so as to collect information on defects in the camera installation area of the back cover of the mobile phone.
[0015] In some implementations, the detection device synthesizes the second image.
[0016] In this technical solution, the detection device synthesizes the second image to detect whether there are defects in the camera installation area on the back cover of the mobile phone under the illumination of the second light source.
[0017] In some embodiments, the third light source includes eight bar-shaped light sources.
[0018] In this technical solution, the plane area of the back cover of the mobile phone is illuminated in sections by using a strip light source to surround the third light source, thereby showing the defects in the plane area of the back cover of the mobile phone. In some embodiments, the strip light shooting device includes eight strip light sources that light up in sequence, and when the strip light sources light up, the camera shoots eight third pictures in sequence.
[0019] In this technical solution, the back cover of the mobile phone is photographed by using a camera when the strip light source is turned on, so as to collect the defects of the flat area of the back cover of the mobile phone.
[0020] In some implementations, the detection device synthesizes the third image.
[0021] In this technical solution, the detection device synthesizes the third image to detect whether there are defects in the flat area of the back cover of the mobile phone under the illumination of the third light source.
[0022] The present invention also provides a method for detecting defects in a mobile phone back cover, using the above-mentioned mobile phone back cover defect detection system, the method comprising: The camera locates the shooting position of the back cover of the mobile phone and takes a picture of the back cover of the mobile phone being tested; Screening mobile phone back cover images with defects, marking the defects in the mobile phone back cover images, and obtaining defect marking images; Use defect annotated images to train the detection device; Testing the training results of the detection device; Use the detection device to inspect the back covers of mobile phones on the production line.
[0023] In this method, a camera locates the shooting position of the back cover of a mobile phone to ensure that the back cover of the mobile phone is within the shooting range of the camera. The camera shoots the back cover of the mobile phone to collect defective pictures of the back cover of the mobile phone. By screening and selecting defective pictures, the detection device is trained using pictures marked with defects, which is beneficial for the detection device to learn to identify defects in pictures of the back cover of the mobile phone taken by the camera, thereby applying the detection device to the production line to replace manual detection methods.
[0024] The beneficial effect of the present invention is that by using a camera to shoot the surface of the back cover of a mobile phone, when the camera is shooting a picture, if there are defects on the surface of the back cover of the mobile phone, the defects on the surface of the back cover of the mobile phone can be displayed in the picture through the coordination of the lighting of the ring light shooting device, the dimming shooting device, the tilt shooting device, the line scanning shooting device, the placement angle of the back cover of the mobile phone and the shooting angle of the camera, and by using a detection device to detect the pictures taken by the camera, pictures with defective features are screened out, thereby screening out defective mobile phone back covers, which greatly improves the detection efficiency while ensuring the accuracy of the detection, ensuring the accuracy of the detection, and greatly improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 A ring light shooting device of a mobile phone back cover detection system according to an embodiment of the present invention; Figure 2 A strip light shooting device of a mobile phone back cover detection system according to an embodiment of the present invention; Figure 3 A tilted shooting device of a mobile phone back cover detection system according to an embodiment of the present invention; Figure 4 A line scan shooting device of a mobile phone back cover detection system according to an embodiment of the present invention; Figure 5 A schematic diagram of a flow chart of a method for detecting a mobile phone back cover according to an embodiment of the present invention; In the figure: 1. camera; 2. back cover of mobile phone; 3. first light source; 4. second light source; 5. third light source; 6. fourth light source; 7. fifth light source; 8. sixth light source. DETAILED DESCRIPTION
[0026] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0027] Combined with Figure 1 To Attachment Figure 4 As shown, this patent application provides a mobile phone back cover 2 defect detection system, including: Camera 1, camera 1 is used to take pictures of the back cover 2 of the mobile phone; The detection device is connected to the camera 1. After the camera 1 takes a picture of the mobile phone back cover 2, the taken picture is transmitted to the detection device. The detection device is used to detect and identify defects in the picture of the mobile phone back cover 2 taken by the camera 1. The defects include scratches, pits, bulges (convex points), point-like discoloration (dark spots, bright spots), abrasions (a combination of slight scratches), marks, indentations, poor texture, dirt, particles, and pits. The ring light shooting device comprises a first light source 3 and a second light source 4. The first light source 3 and the second light source 4 are in a circular ring shape. The first light source 3 comprises four first arc light sources, and the second light source 4 comprises eight second arc light sources. The first light source 3 is arranged at 10-25 mm above the back cover 2 of the mobile phone to be inspected, and the second light source 4 is arranged at 225-265 mm above the back cover 2 of the mobile phone to be inspected. The camera 1 is arranged at 225-265 mm above the back cover 2 of the mobile phone to be inspected, and the back cover 2 of the mobile phone to be inspected is arranged parallel to the horizontal plane. The ring light shooting device is used to detect various defects in the camera installation area of the back cover 2 of the mobile phone; The strip light shooting device includes a third light source 5, which is formed by a ring-shaped combination of eight strip light sources. The third light source 5 is arranged 10-30 mm above the back cover 2 of the mobile phone to be tested, and the camera 1 is arranged 225-265 mm above the back cover 2 of the mobile phone to be tested, and the back cover 2 of the mobile phone to be tested is arranged parallel to the horizontal plane; The strip light shooting device is used to detect various defects in the plane area of the back cover 2 of the mobile phone; The tilted shooting device includes a fourth light source 6 and a fifth light source 7, the fourth light source 6 and the fifth light source 7 are arranged at 90°, the fourth light source 6 and the fifth light source 7 are arranged at 45° to the horizontal plane, the fourth light source 6 and the fifth light source 7 are arranged 150 mm above the placement plane of the detected mobile phone back cover 2, the fourth light source 6 and the fifth light source 7 are arranged on the same horizontal plane, the shortest distance between the fourth light source 6 and the fifth light source 7 is 200 mm, the camera 1 is arranged 330 mm above the placement plane of the detected mobile phone back cover 2, and the detected mobile phone back cover 2 is arranged at 40° to the horizontal plane; The tilted camera device is used to detect various defects in the side edge area of the mobile phone back cover 2; The line scan shooting device comprises a sixth light source 8, the sixth light source 8 is arranged at 40-50 degrees with the horizontal plane, the camera 1 is arranged at 40-50 degrees with the horizontal plane, and the back cover 2 of the detected mobile phone is arranged parallel to the horizontal plane; The line scan camera is used to detect bright-print defects on the plane of the back cover 2 of the mobile phone.
[0028] In some embodiments, the ring light shooting device includes: four first arc-shaped light sources are lit up in sequence, and when the first arc-shaped light sources are lit up, the camera 1 takes four pictures in sequence.
[0029] For example, the four first arc light sources are arc light source A, arc light source B, arc light source C, and arc light source D. When the back cover 2 of the mobile phone is in the ring light shooting device, arc light source A, arc light source B, arc light source C, and arc light source D light up in sequence, and when each first arc light source lights up, a picture is taken, for a total of four pictures.
[0030] In some implementations, the detection device synthesizes the first image.
[0031] The detection device synthesizes the four first pictures to form a picture, which includes details of the pictures of the back cover 2 of the mobile phone taken when the first arc light sources are lit in sequence. For example, when a first arc light source is lit, the illuminated area is a circular arc area with a central angle of 90°. Therefore, to display the picture of the entire camera installation area of the back cover 2 of the mobile phone, it is necessary to combine the pictures when the four first arc light sources are lit to detect whether there are defects in the camera installation area of the back cover 2 of the mobile phone under the illumination of the first light source 3.
[0032] In some embodiments, the ring light shooting device includes eight second arc-shaped light sources that light up in sequence, and when the second arc-shaped light sources light up, the camera 1 takes eight pictures in sequence.
[0033] For example, the eight first arc light sources are arc light source D, arc light source F, arc light source G, arc light source H, arc light source I, arc light source J, arc light source K, and arc light source L. When the back cover 2 of the mobile phone is in the ring light shooting device, arc light source A, arc light source B, arc light source C, arc light source D, arc light source I, arc light source J, arc light source K, and arc light source L light up in sequence, and when each second arc light source lights up, a picture is taken, for a total of eight pictures.
[0034] In some implementations, the detection device synthesizes the second image.
[0035] The detection device synthesizes the eight second pictures to form a picture, which includes details of the pictures of the back cover 2 of the mobile phone taken when the second arc light sources are lit up in sequence. For example, when a second arc light source is lit up, the illuminated area is a circular arc area with a central angle of 60°. Therefore, to display the picture of the entire camera installation area of the back cover 2 of the mobile phone, it is necessary to combine the pictures when the eight second arc light sources are lit up to detect whether there are defects in the camera installation area of the back cover 2 of the mobile phone under the illumination of the second light source 4.
[0036] Combined with Figure 2 As shown, in some embodiments, the strip light shooting device includes eight strip light sources that light up in sequence, and when the strip light sources light up, the camera 1 takes eight pictures in sequence.
[0037] For example, the eight bar light sources are bar light source D, bar light source F, bar light source G, bar light source H, bar light source I, bar light source J, bar light source K, and bar light source L. When the back cover 2 of the mobile phone is in the ring light shooting device, the bar light source A, bar light source B, bar light source C, bar light source D, bar light source I, bar light source J, bar light source K, and bar light source L light up in sequence, and when each bar light source lights up, a picture is taken, for a total of eight pictures.
[0038] In some implementations, the detection device synthesizes the third image.
[0039] The detection device synthesizes the eight third pictures to form a picture, which includes details of the pictures of the back cover 2 of the mobile phone taken when the strip light sources are lit up in sequence. For example, the eight strip light sources respectively illuminate the eight areas of the plane area of the back cover 2 of the mobile phone. When one strip light source is lit up, it can only illuminate one of the areas. Therefore, it is necessary to synthesize the pictures taken when the eight strip light sources are lit up to detect whether there are defects in the plane area of the back cover 2 of the mobile phone under the illumination of the third light source 5.
[0040] Combined with Figure 5 As shown, the present invention provides a method for detecting defects in a mobile phone back cover, using the above-mentioned mobile phone back cover defect detection system, and the method for detecting defects in a mobile phone back cover comprises: S100: The camera locates the shooting position of the back cover of the mobile phone and takes a picture of the back cover of the mobile phone being inspected.
[0041] After the back cover of the mobile phone is placed in the shooting position, the camera positions the back cover of the mobile phone to ensure that the entire back cover of the mobile phone is included in the captured picture, which is conducive to the inspection of various areas of the back cover of the mobile phone during inspection to prevent missing parts.
[0042] S200: Screening images of mobile phone back covers with defects, marking defects in the images of mobile phone back covers, and obtaining defect-marked images.
[0043] For example, the operator can identify the defects in the picture of the back cover of a mobile phone, and screen out the pictures of the back cover of the mobile phone with defective features. In the picture of the back cover of the mobile phone, the defects in the picture are marked by software.
[0044] S300: Training the detection device using the defect annotated images.
[0045] The detection device is trained in a loop using defect annotated images so that the detection device can repeatedly identify the defects marked in the images. For example, different defect annotated images are repeatedly input into the AI software in the test device so that the AI software in the test device can recognize and identify the defects in the images, thereby enabling the defect detection device to learn to identify defects.
[0046] S400: Testing the training result of the detection device.
[0047] For example, the test device is tested using unlabeled images to detect whether the test device can identify defects in the images, so as to determine whether the training results of the test device meet the standards.
[0048] S500: Use the detection device to inspect the back covers of mobile phones on the production line.
[0049] The mobile phone back cover defect detection system is put into the production line, and the detection device is used to detect the defects of the mobile phone back cover.
[0050] In summary, the present invention provides a mobile phone back cover defect detection system and method, which uses a camera to shoot the surface of the mobile phone back cover. When the camera takes a picture, if there are defects on the photographed surface of the mobile phone back cover, the defects on the surface of the mobile phone back cover are displayed in the picture through the coordination of the lighting of the ring light shooting device, the dimming shooting device, the tilt shooting device, the line scan shooting device, the placement angle of the mobile phone back cover and the shooting angle of the camera. By using a detection device to detect the pictures taken by the camera, pictures with defective features are screened out, thereby screening defective mobile phone back covers, which greatly improves the detection efficiency while ensuring the accuracy of the detection.
[0051] The above implementation modes are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.
Claims
1. A mobile phone back cover defect detection system, characterized in that: include: A camera, which is used to take a picture of the back cover of the mobile phone being inspected; A detection device, the detection device is connected to the camera; A ring light camera device, the ring light camera device comprising a first light source and a second light source, the first light source and the second light source are in a circular ring shape, the first light source is arranged on the upper side of the back cover of the mobile phone to be detected, the second light source is arranged on the upper side of the first light source, the camera is arranged on the upper side of the second light source, and the back cover of the mobile phone to be detected is arranged parallel to the horizontal plane; A strip light shooting device, wherein the strip light shooting device comprises a third light source, the third light source is a regular polygon, the third light source is arranged on the upper side of the back cover of the detected mobile phone, the camera is arranged on the upper side of the third light source, and the back cover of the detected mobile phone is arranged parallel to the horizontal plane; An inclined shooting device, the inclined shooting device comprises a fourth light source and a fifth light source, the fourth light source and the fifth light source are arranged at 90°, the fourth light source and the fifth light source are arranged at 45° to the horizontal plane, the fourth light source and the fifth light source are arranged on the upper side of the plane on which the back cover of the detected mobile phone is placed, the fourth light source and the fifth light source are arranged on the same horizontal plane, the camera is arranged on the upper side of the back cover of the detected mobile phone, and the back cover of the detected mobile phone is arranged at 40° to the horizontal plane; The line scan shooting device comprises a sixth light source, the sixth light source is arranged at 40-50 degrees to the horizontal plane, the camera is arranged at 40-50 degrees to the horizontal plane, and the back cover of the mobile phone to be detected is arranged parallel to the horizontal plane.
2. The mobile phone back cover defect detection system according to claim 1, characterized in that: The first light source includes four first arc-shaped light sources, and the second light source includes eight second arc-shaped light sources.
3. The mobile phone back cover defect detection system according to claim 2, characterized in that: The ring light shooting device comprises: the four first arc light sources are lit up in sequence, and when the first arc light sources are lit up, the camera shoots four first pictures in sequence.
4. The mobile phone back cover defect detection system according to claim 3, characterized in that: The detection device synthesizes the first picture.
5. The mobile phone back cover defect detection system according to claim 2, characterized in that: The ring light shooting device comprises: the eight second arc light sources light up in sequence, and when the second arc light sources light up, the camera shoots eight second pictures in sequence.
6. The mobile phone back cover defect detection system according to claim 5, characterized in that: The detection device synthesizes the second picture.
7. The mobile phone back cover defect detection system according to claim 1, characterized in that: The third light source includes eight bar-shaped light sources.
8. The mobile phone back cover defect detection system according to claim 7, characterized in that: The strip light shooting device comprises: the eight strip light sources are lit up in sequence, and when the strip light sources are lit up, the camera shoots eight third pictures in sequence.
9. The mobile phone back cover defect detection system according to claim 8, characterized in that: The detection device synthesizes the third picture.
10. A method for detecting defects in a mobile phone back cover, using the mobile phone back cover defect detection system according to any one of claims 1 to 9, characterized in that: The method comprises: The camera locates the shooting position of the mobile phone back cover and takes a picture of the detected mobile phone back cover; Screening pictures of mobile phone back covers with defects, marking the defects in the pictures of mobile phone back covers, and obtaining defect-marked pictures; Using the defect annotated image to train the detection device; Testing the training result of the detection device; The detection device is used to detect the back covers of mobile phones on the production line.