Appearance detecting and screening device and control method thereof

Abstract

The invention relates to an appearance detecting and screening device and a control method thereof, and relates to the technical field of automatic detection, the appearance detecting and screening device comprises a conveying belt, a posture adjusting device, a collecting device, a visual detecting device and a processor; the feeding end of the conveying belt is connected with a discharging port of the posture adjusting device, and the discharging end of the conveying belt is connected with the collecting device. The posture adjusting equipment is used for adjusting the posture of the to-be-detected accessory, the conveying belt is used for conveying the to-be-detected accessory, and the collecting equipment is used for collecting the accessory subjected to appearance detection; the visual inspection equipment and the processor are located on one side of the conveying belt, and the visual inspection equipment is electrically connected with the processor; the visual detection equipment is used for shooting a detection image of the to-be-detected accessory and uploading the detection image to the processor, and the processor is used for receiving the detection image and judging whether the to-be-detected accessory is a good product or a defective product according to the detection image. The method has the effect of improving the efficiency and accuracy of appearance detection.

Description

Technical Field

[0001] The present application relates to the field of automated detection technology, and in particular to an appearance detection and screening device and a control method thereof. Background Art

[0002] Usually, more sophisticated accessories have higher requirements for their appearance accuracy. If there are deviations or quality problems in the appearance, it may affect the quality of the final assembled product. Therefore, when processing accessories, it is usually necessary to inspect their appearance.

[0003] In traditional technology, the appearance inspection of accessories is mostly done by staff members observing with their naked eyes. This method is inefficient and may cause observation errors when the body becomes tired, resulting in low accuracy of appearance inspection. At present, there are also technologies that use visual cameras to assist in appearance inspection, but since the posture of the accessories will affect the effect of appearance inspection, before the visual camera takes a photo, the staff members need to adjust the posture of the accessories one by one, which also requires manual work, resulting in low efficiency of appearance inspection. Summary of the invention

[0004] The purpose of this application is to provide an appearance inspection and screening device and a control method thereof, which can effectively improve the efficiency of appearance inspection.

[0005] In the first aspect, the present application provides an appearance detection and screening device that adopts the following technical solution: An appearance inspection and screening device, comprising a conveyor belt, a posture adjustment device, a collection device, a visual inspection device and a processor; The feeding end of the conveyor belt is connected to the discharge port of the posture adjustment device, and the discharge end of the conveyor belt is connected to the collection device; The posture adjustment device is used to adjust the posture of the accessory to be tested, the conveyor belt is used to convey the accessory to be tested, and the collection device is used to collect the accessories after appearance inspection; The visual inspection device and the processor are located on one side of the conveyor belt, and the visual inspection device and the processor are electrically connected; The visual inspection device is used to capture an inspection image of the accessory to be tested and upload it to a processor, and the processor is used to receive the inspection image and determine whether the accessory to be tested is a good product or a defective product based on the inspection image.

[0006] By adopting the above-mentioned technical solution, the present application automatically adjusts the posture of the accessories through the posture adjustment device, so that the accessories to be tested can be transported to the visual inspection equipment for automated appearance inspection while maintaining a consistent posture. There is no need for staff to manually adjust the accessories one by one, thereby improving the efficiency and accuracy of appearance inspection.

[0007] Furthermore, the posture adjustment device includes a vibration plate and a feeding channel, the discharge port of the vibration plate is connected to the feeding end of the feeding channel, and the discharge end of the feeding channel is connected to the feeding end of the conveyor belt.

[0008] By adopting the above technical solution, the vibration plate is an auxiliary feeding tool, which is vibrated by a pulse magnet, so that the accessories in the vibration plate are vibrated to the discharge port. The vibration plate of the present application can automatically and orderly arrange the disordered accessories and accurately transport them to the feeding channel through vibration, ensuring that the posture of the accessories remains consistent and meets the requirements, thereby improving the efficiency and accuracy of appearance inspection.

[0009] Furthermore, the vibration plate includes a spiral feeding track, and an outlet of the feeding track is connected to a feeding end of a feeding channel.

[0010] By adopting the above technical solution, the accessories to be tested automatically adjust their posture while being transported in the spiral feeding track, ensuring that the posture of the accessories to be tested sent out from the feeding track remains consistent and meets the requirements, thereby improving the efficiency of appearance inspection.

[0011] Furthermore, the feeding track includes a feeding part, a posture adjustment part and a discharging part which are sequentially connected along the feeding direction; The posture adjustment part comprises two parallel feeding troughs, and the side wall of the posture adjustment part is provided with a plurality of posture adjustment sheets distributed along the feeding direction.

[0012] By adopting the above technical solution, the accessories to be tested are loaded from the loading part, and the vibration of the vibration plate makes the accessories to be tested move along the feeding track. There are two paths in the posture adjustment part. When the accessories pass through the posture adjustment plate, they adjust their own posture under the drive of the posture adjustment plate. Accessories whose posture differences are too large to be adjusted are driven by the posture adjustment plate to leave the feeding track, so that the accessories to be tested automatically adjust their posture in the posture adjustment part, and finally the accessories with the same posture are transported to the discharging part, completing the automatic posture adjustment of the accessories to be tested. This application realizes the automatic posture adjustment of the accessories to be tested through a simple structure, which is more efficient than manual adjustment by staff.

[0013] Further, the collecting device comprises a first collecting box, a second collecting box and a blowing nozzle, the first collecting box is located below the discharge end of the conveyor belt, and the second collecting box is located on one side of the conveyor belt; The air blowing nozzle is located at the other side of the conveyor belt and is directly opposite to the second collecting box. The air blowing nozzle is electrically connected to the processor.

[0014] By adopting the above-mentioned technical solution, the present application is provided with two collection boxes for collecting good products and defective products respectively, and can automatically pick out defective products in accessories, so that in addition to performing appearance inspection on accessories, the present application can also screen the accessories after the appearance inspection is completed, without the need for manual operation by staff, thereby ensuring the efficiency of appearance inspection.

[0015] Furthermore, the first collection box is a good product collection box, and the second collection box is a defective product collection box; When the processor determines that the tested accessory is a good product, the conveyor belt conveys the accessory after the appearance inspection to the first collection box; When the processor determines that the accessory to be tested is a defective product, the conveyor belt conveys the accessory after the appearance inspection to the blowing nozzle, and the processor controls the blowing nozzle to blow the accessory to the second collection box.

[0016] By adopting the above technical solution, the present application cooperates with the collection box and the blowing nozzle to blow the detected defective products from the conveyor belt into the defective product collection box, eliminating the need for manual picking and screening of defective products, thereby ensuring the efficiency of appearance inspection.

[0017] Furthermore, the visual inspection equipment includes a support frame, a height adjustment component and an image acquisition component. The height adjustment component is installed on the side of the support frame close to the conveyor belt, and the image acquisition component is slidably connected to the support frame through the height adjustment component.

[0018] By adopting the above technical solution, the present application collects the detection image of the accessory to be tested through the image acquisition component, and adjusts the height of the image acquisition component through the height adjustment component, so that the image acquisition component can collect clearer detection images to ensure the accuracy of appearance detection.

[0019] Furthermore, the image acquisition component includes at least one visual camera and a light source, and the visual camera is perpendicular to the surface of the conveyor belt.

[0020] By adopting the above technical solution, the present application collects the detection image of the accessory to be tested through a visual camera, and supplements the light source with the accessory to be tested to ensure that the detection image is clear enough.

[0021] Furthermore, the height adjustment component includes a slide rail installed on the side of the support frame close to the conveyor belt and a slider slidably connected to the slide rail. The image acquisition component is fixedly connected to the slider, and the height of the image acquisition component is adjusted by the slider and the slide rail.

[0022] By adopting the above-mentioned technical solution, the image acquisition component of the present application adjusts the shooting height by moving the slider up and down along the slide rail to adapt to the inspection image shooting of accessories of different sizes, ensuring that the shooting clarity can be adjusted, thereby improving the accuracy of appearance inspection.

[0023] In the second aspect, the present application provides a control method for an appearance detection and screening device using the following technical solution: A control method for an appearance detection and screening device, comprising: When the conveyor belt conveys the accessory to be tested close to the visual inspection device, the processor controls the visual inspection device to collect an inspection image of the accessory to be tested; The visual inspection device uploads the collected inspection images to the processor; The processor receives the detection image and determines whether the detected accessory is a good product or a defective product based on the detection image.

[0024] By adopting the above-mentioned technical solution, the present application automatically collects the inspection image of the accessory to be tested through visual inspection, so that the processor can determine whether the accessory to be tested is a good product or a defective product, and at the same time has the effect of screening the accessories, thereby improving the efficiency and accuracy of the accessory appearance inspection.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. This application automatically adjusts the posture of the accessories through the posture adjustment device, so that the accessories to be tested can be transported to the visual inspection equipment in a consistent posture for automated appearance inspection, without the need for staff to manually adjust the accessories one by one, thereby improving the efficiency and accuracy of appearance inspection; 2. The vibration plate of the present application can automatically and orderly arrange the disordered accessories and accurately transport them to the feeding channel through vibration, ensuring that the posture of the accessories remains consistent and meets the requirements, thereby improving the efficiency and accuracy of appearance inspection; 3. The present application is provided with two collection boxes for collecting good products and defective products respectively, and can automatically pick out defective products in accessories, so that in addition to performing appearance inspection on accessories, the present application can also screen the accessories after the appearance inspection is completed, without the need for manual operation by staff, thereby ensuring the efficiency of appearance inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a schematic diagram of the structure of a posture adjustment device according to an embodiment of the present application; Figure 3 is a schematic diagram of the structure of a visual inspection device according to an embodiment of the present application; Figure 4 is a flow chart of the control method of an embodiment of the present application; In the figure, 1. conveyor belt; 2. posture adjustment device; 21. vibration plate; 211. loading part; 212. posture adjustment part; 213. discharging part; 214. posture adjustment plate; 22. loading channel; 31. first collecting box; 32. second collecting box; 33. blowing nozzle; 4. visual inspection equipment; 41. height adjustment component; 411. slide rail; 412. slider; 42. image acquisition component; 421. visual camera; 422. light source; 5. processor. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 -Attached Figure 4 , further details of this application are given.

[0028] In traditional technology, the appearance inspection of accessories is often done by staff members observing with their naked eyes. The naked eye inspection method is inefficient and may cause observation errors when the human body becomes tired, resulting in low accuracy of appearance inspection. At present, there is also a technology that uses visual cameras to assist in appearance inspection. However, since the posture of the accessories will affect the effect of appearance inspection, the staff members need to adjust the posture of the accessories one by one before the visual camera takes a photo, which also requires manual work, resulting in low efficiency of appearance inspection. Therefore, the embodiment of the present application provides an appearance inspection screening device, referring to Figure 1 , including a conveyor belt 1, a posture adjustment device 2, a collecting device, a visual inspection device 4 and a processor 5. The posture adjustment device 2 is used to adjust the posture of the accessories to be tested, the conveyor belt 1 is used to transport the accessories to be tested, and the collecting device is used to collect the accessories after appearance inspection. The feeding end of the conveyor belt 1 is connected to the discharge port of the posture adjustment device 2, and the discharge end is connected to the collecting device. The accessories to be tested after the posture adjustment device 2 adjusts the posture are transported to the appearance inspection device for appearance inspection, and then transported to the collecting device for screening and collection. The visual inspection device 4 and the processor 5 are located on one side of the conveyor belt 1, and the visual inspection device 4 and the processor 5 are electrically connected. The visual inspection device 4 is used to capture the inspection image of the accessories to be tested and upload it to the processor 5, and the processor 5 is used to receive the inspection image and judge whether the accessories to be tested are good or defective through the inspection image.

[0029] The implementation principle of the embodiment of the present application is: the posture of the accessory is automatically adjusted through the posture adjustment device 2, so that the accessory to be tested can be transported to the visual inspection device 4 in a consistent posture for automated appearance inspection, without the need for staff to manually adjust the accessories one by one, thereby improving the efficiency and accuracy of appearance inspection.

[0030] like Figure 1As shown, the collecting device includes a first collecting box 31, a second collecting box 32 and an air blowing nozzle 33. The first collecting box 31 is located below the discharge end of the conveyor belt 1, and the second collecting box 32 is located on one side of the conveyor belt 1 and behind the visual inspection device 4 along the conveying direction. The air blowing nozzle 33 is located on the other side of the conveyor belt 1 and is directly opposite to the second collecting box 32. The air blowing nozzle 33 is electrically connected to the processor 5.

[0031] The implementation principle of the embodiment of the present application is: two collection boxes are provided to collect good products and defective products respectively, and the defective products in the accessories can be automatically picked out, so that in addition to performing appearance inspection on the accessories, this embodiment can also screen the accessories after the appearance inspection is completed, without the need for manual operation by the staff, thereby ensuring the efficiency of the appearance inspection.

[0032] In one embodiment, the first collection box 31 is a good product collection box, and the second collection box 32 is a defective product collection box. When the processor 5 determines that the accessory to be tested is a good product, the conveyor belt 1 conveys the accessory after the appearance inspection to the first collection box 31; when the processor 5 determines that the accessory to be tested is a defective product, the conveyor belt 1 conveys the accessory after the appearance inspection to the blowing nozzle 33, and the processor 5 controls the blowing nozzle 33 to blow the accessory to the second collection box 32. In another embodiment, the second collection box 32 is a good product collection box, and the first collection box 31 is a defective product collection box. When the processor 5 determines that the accessory to be tested is a defective product, the conveyor belt 1 conveys the accessory after the appearance inspection to the first collection box 31; when the processor 5 determines that the accessory to be tested is a good product, the conveyor belt 1 conveys the accessory after the appearance inspection to the blowing nozzle 33, and the processor 5 controls the blowing nozzle 33 to blow the accessory to the second collection box 32. Through the cooperation of the second collecting box 32 and the blowing nozzle 33, the detected defective or good products are blown from the conveyor belt 1 to the second collecting box 32, while the accessories that are not blown to the second collecting box 32 are transported along the conveyor belt 1 to the first collecting box 31 at the end, so that the defective and good products detected by the appearance inspection are collected separately, eliminating the need for manual sorting and screening of defective products, thereby ensuring the efficiency of appearance inspection.

[0033] Since the appearance inspection of accessories requires the collection of inspection images for analysis, and image recognition models are usually used when analyzing the inspection images, in order to ensure that the model can quickly identify the features of the inspection images, it is necessary to ensure that the posture of the accessories is consistent when collecting the inspection images. In addition, the important parts of the accessories that need to be inspected can be accurately identified through the corresponding posture. Therefore, this embodiment sets a posture adjustment device 2 to adjust the posture of the accessories before the appearance inspection. Figure 2As shown, the posture adjustment device 2 includes a vibration plate 21 and a feeding channel 22, the discharge port of the vibration plate 21 is connected to the feeding end of the feeding channel 22, and the discharge end of the feeding channel 22 is connected to the feeding end of the conveyor belt 1. The vibration plate 21 includes a spiral feeding track, and the outlet of the feeding track is connected to the feeding end of the feeding channel 22. The feeding track includes a feeding part 211, a posture adjustment part 212 and a discharge part 213 connected in sequence along the feeding direction. The posture adjustment part 212 includes two parallel feeding troughs, and the side wall of the posture adjustment part 212 is provided with a plurality of posture adjustment pieces 214 distributed along the feeding direction. When the accessories pass through the posture adjustment part 212, due to the limiting effect of the posture adjustment piece 214, the accessories are moved by the posture adjustment piece 214 during the movement. The width of the feeding channel 22 is adapted to the width of the accessories, which is just enough for the accessories to pass through in a single line, so as to ensure that the accessories after posture adjustment can maintain the adjusted posture and be transported to the conveyor belt 1 one by one.

[0034] The vibration plate 21 is an auxiliary feeding tool, which is vibrated by a pulse magnet, so that the accessories in the vibration plate 21 are vibrated to the discharge port, and the posture of the accessories is adjusted during the vibration process, so that the accessories output from the discharge port maintain a consistent posture. In the specific implementation process, by adopting the above technical solution, the accessories to be tested are loaded from the loading part 211, and the vibration of the vibration plate 21 causes the accessories to be tested to move along the feeding track, and are divided into two paths in the posture adjustment part 212. When the accessories pass through the posture adjustment plate 214, they adjust their own posture under the drive of the posture adjustment plate 214. Accessories whose posture differences are too large to be adjusted are driven by the posture adjustment plate 214 to leave the feeding track, so that the accessories to be tested automatically adjust their posture in the posture adjustment part 212, and finally the accessories with consistent postures are transported to the discharge part 213, completing the automatic posture adjustment of the accessories to be tested.

[0035] The implementation principle of the embodiment of the present application is: automatic posture adjustment of the accessory to be tested is achieved through a simple structure, which is more efficient than manual adjustment by staff in the prior art and can ensure the accuracy of subsequent appearance inspection.

[0036] like Figure 3As shown, the visual inspection device 4 includes a support frame, a height adjustment component 41 and an image acquisition component 42. The height adjustment component 41 is installed on the side of the support frame close to the conveyor belt 1, and the image acquisition component 42 is slidably connected to the support frame through the height adjustment component 41. The image acquisition component 42 includes a visual camera and a light source. The shooting direction of the visual camera and the irradiation direction of the light source are both perpendicular to the surface of the conveyor belt. The visual camera is used to collect a top view of the accessory to be tested as a detection image, and the light source is used to fill the light of the accessory to be tested to ensure the brightness during shooting, thereby ensuring that the collected detection image is clear enough. The height adjustment component 41 includes a slide rail 411 installed on the side of the support frame close to the conveyor belt 1 and a slider 412 slidably connected to the slide rail 411. The image acquisition component 42 is fixedly connected to the slider 412, and the height of the image acquisition component 42 is adjusted by the relative up and down movement of the slider 412 and the slide rail 411. In the specific implementation process, the image acquisition component 42 uses a CCD visual inspection camera and an electronic flash to collect the detection image.

[0037] In another embodiment, in addition to setting a visual camera at a position perpendicular to the conveyor belt for capturing a top view of the accessory to be tested, the image acquisition component 42 may also set multiple visual cameras to capture detection images of the accessory to be tested from different angles, such as taking a side view of the accessory to be tested from the side, etc. The detection images at multiple angles are uploaded to the processor 5 for image recognition to further ensure the accuracy of appearance detection.

[0038] The implementation principle of the embodiment of the present application is: the detection image of the accessory to be tested is collected by the image acquisition component 42, and the height of the image acquisition component 42 is adjusted by the height adjustment component 41 so that the image acquisition component 42 can collect a clearer detection image. The image acquisition component 42 moves up and down along the slide rail 411 through the slider 412 to adjust the shooting height to adapt to the detection image shooting of accessories of different sizes, ensuring that the clarity of the shooting can be adjusted, thereby improving the accuracy of appearance detection.

[0039] like Figure 4 As shown, the embodiment of the present application also provides a control method of an appearance detection and screening device, including: S1. When the conveyor belt 1 conveys the accessory to be tested close to the visual inspection device 4, the processor 5 controls the visual inspection device 4 to collect an inspection image of the accessory to be tested.

[0040] Specifically, the processor 5 controls the height adjustment component 41 to move the image acquisition component 42 to a height at which a clear detection image of the accessory to be tested can be captured. The accessory to be tested, after its posture is adjusted by the posture adjustment device 2, is conveyed by the conveyor belt 1 to a place close to the visual inspection device 4. The processor 5 controls the image acquisition component 42 to capture the image of the accessory to be tested. When the light source is turned on, the visual camera captures the image of the accessory to be tested as a detection image.

[0041] S2. The visual inspection device 4 uploads the collected inspection image to the processor 5.

[0042] Specifically, the visual inspection device 4 is electrically connected to the processor 5 , so they can transmit data to each other. While the visual inspection device 4 is controlled by the processor 5 , it can also upload the inspection images it has collected.

[0043] S3. The processor 5 receives the detection image and determines whether the accessory to be tested is a good product or a defective product based on the detection image.

[0044] Specifically, an image recognition algorithm is used, the processor 5 constructs an image recognition model, and uses the pre-acquired good sample set of detection images and the sample set of detection images of defective products to jointly train the image recognition model. After the trained image recognition model is obtained, the detection image of the accessory to be tested is input into the image recognition model, so that the appearance detection judgment result of the accessory to be tested can be output as good or defective. Among them, the judgment standard of defective products in the detection image defective sample set is pre-set according to the standard required for the accessory to be tested. For example, when the accessory has defects such as uneven surface and structures that need to be parallel are not parallel, the accessory is judged as defective.

[0045] The embodiment of the present application uses a model to perform appearance detection and judgment, which has higher accuracy and reliability than manual observation. It can also effectively reduce problems such as large errors caused by human eye fatigue and increase the intelligence of appearance detection.

[0046] In one embodiment, when the processor 5 determines that the accessory to be tested is a good product through the detection image, the conveyor belt 1 transports the accessory to the first collection box 31; when the processor 5 determines that the accessory to be tested is a defective product through the detection image, the conveyor belt 1 transports the accessory to a place near the second collection box 32, and the processor 5 controls the blowing nozzle 33 to work and blow the accessory into the second collection box 32.

[0047] The implementation principle of the embodiment of the present application is: the inspection image of the accessory to be tested is automatically collected through visual inspection, so that the processor 5 can determine whether the accessory to be tested is a good product or a defective product. At the same time, the processor 5 controls the blowing nozzle 33 to collect the good products and the defective products into the first collection box 31 and the second collection box 32 respectively, so as to screen the accessories after the appearance inspection, thereby improving the efficiency and accuracy of the accessory appearance inspection.

[0048] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An appearance detection and screening device, characterized in that: It comprises a conveyor belt (1), a posture adjustment device (2), a collection device, a visual inspection device (4) and a processor (5); The feeding end of the conveyor belt (1) is connected to the discharge port of the posture adjustment device (2), and the discharge end of the conveyor belt (1) is connected to the collection device; The posture adjustment device (2) is used to adjust the posture of the accessory to be tested, the conveyor belt (1) is used to convey the accessory to be tested, and the collection device is used to collect the accessories after appearance inspection; The visual inspection device (4) and the processor (5) are located on one side of the conveyor belt (1), and the visual inspection device (4) and the processor (5) are electrically connected; The visual inspection device (4) is used to capture an inspection image of the accessory to be inspected and upload it to a processor (5); the processor (5) is used to receive the inspection image and determine whether the accessory to be inspected is a good product or a defective product based on the inspection image.

2. The appearance detection and screening device according to claim 1, characterized in that: The posture adjustment device (2) comprises a vibration plate (21) and a feeding channel (22), the discharge port of the vibration plate (21) is connected to the feeding end of the feeding channel (22), and the discharge end of the feeding channel (22) is connected to the feeding end of the conveyor belt (1).

3. The appearance detection and screening device according to claim 2, characterized in that: The vibration plate (21) comprises a spiral feeding track, and the outlet of the feeding track is connected to the feeding end of the feeding channel (22).

4. The appearance detection and screening device according to claim 3, characterized in that: The feeding track comprises a feeding portion (211), a posture adjustment portion (212) and a discharging portion (213) which are sequentially connected along a feeding direction; The posture adjustment part (212) comprises two parallel feeding troughs, and the side wall of the posture adjustment part (212) is provided with a plurality of posture adjustment pieces (214) distributed along the feeding direction.

5. The appearance detection and screening device according to claim 1, characterized in that: The collecting device comprises a first collecting box (31), a second collecting box (32) and a blowing nozzle (33), wherein the first collecting box (31) is located below the discharge end of the conveyor belt (1), and the second collecting box (32) is located on one side of the conveyor belt (1); The air blowing nozzle (33) is located at the other side of the conveyor belt (1) and is directly opposite to the second collecting box (32). The air blowing nozzle (33) is electrically connected to the processor (5).

6. An appearance detection and screening device according to claim 5 (light source), characterized in that: The first collection box (31) is a good product collection box, and the second collection box (32) is a defective product collection box; When the processor (5) determines that the accessory to be tested is a good product, the conveyor belt (1) conveys the accessory after the appearance inspection to the first collection box (31); When the processor (5) determines that the accessory to be tested is a defective product, the conveyor belt (1) conveys the accessory after the appearance inspection to the blowing nozzle (33), and the processor (5) controls the blowing nozzle (33) to blow the accessory to the second collection box (32).

7. An appearance detection and screening device according to any one of claims 1 to 6, characterized in that: The visual inspection device (4) comprises a support frame, a height adjustment component (41) and an image acquisition component (42); the height adjustment component (41) is installed on a side of the support frame close to the conveyor belt (1); and the image acquisition component (42) is slidably connected to the support frame via the height adjustment component (41).

8. The appearance detection and screening device according to claim 7, characterized in that: The image acquisition component (42) comprises at least one visual camera (421) and a light source (422); the visual camera (421) is perpendicular to the surface of the conveyor belt (1).

9. The appearance detection and screening device according to claim 7, characterized in that: The height adjustment component (41) comprises a slide rail (411) mounted on a side of a support frame close to the conveyor belt (1) and a slider (412) slidably connected to the slide rail (411); the image acquisition component (42) is fixedly connected to the slider (412); and the height of the image acquisition component (42) is adjusted by the slider (412) and the slide rail (411).

10. A control method for an appearance detection and screening device, characterized in that: include: When the conveyor belt (1) conveys the accessory to be tested close to the visual inspection device (4), the processor (5) controls the visual inspection device (4) to collect an inspection image of the accessory to be tested; The visual inspection device (4) uploads the collected inspection image to the processor (5); The processor (5) receives the detection image and determines whether the accessory to be tested is a good product or a defective product based on the detection image.

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