Capacitor appearance defect rapid identification system based on machine vision

Abstract

The invention relates to the technical field of detection equipment, in particular to a capacitor appearance defect rapid identification system based on machine vision, which comprises a working table, and an upper layer plate is arranged above the working table; the material distribution disc is arranged at the top of the upper-layer plate, and a plurality of longitudinally-through material distribution holes are formed in the edge of the material distribution disc; the vibration disc is provided with an arc-shaped discharge pipe; the side wall detection cylinder is of a transparent round pipe structure vertically arranged between the discharging pipe and the material distribution disc, and a detection motor is arranged between the side wall detection cylinder and the upper layer plate; the side wall camera faces the bottom of the side wall detection cylinder; and the first material collecting groove is formed below the upper-layer plate and corresponds to the material falling hole. According to the invention, the defect detection of the outer side wall of the capacitor element is completed through the fixed side wall camera and the rotary side wall detection cylinder, so that the function of visual rapid defect detection is realized, the qualified rate of final products is improved, the requirement on manual operation is reduced, and the detection and identification efficiency is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and in particular to a system for quickly identifying appearance defects of capacitors based on machine vision. Background Art

[0002] In large-scale modern industrial production, all kinds of electronic products have entered people's vision and all aspects of life, greatly enriching our material life and promoting the development of production. Today, my country is in a period of rapid development of the manufacturing industry. The infrastructure of testing equipment is relatively weak and is still in the extensive stage. For example, the appearance inspection of capacitors is still in the semi-automatic inspection stage, which requires a lot of manpower to participate. In the electronic products used in various industries, the size of capacitors to be used is different due to different industries. These capacitors are all manually inspected. Larger capacitors, such as those with a diameter of 15 to 30 mm, can be detected by the human eye for appearance defects and other problems. Small capacitors, such as those with a diameter of 4 to 10 mm, are easy to cause misdetection and missed detection by human eyes. These inspections vary from person to person and have different differences in efficiency and quality. In order to reduce these effects and improve efficiency, production companies need to give operators special training, and they also need to have a large number of actual production line operations, which not only increases production costs, but also requires higher and higher requirements for operators, which has seriously affected the progress of production and cannot meet the company's pursuit of high quality and high efficiency. Summary of the invention

[0003] The present invention provides a capacitor appearance defect rapid identification system based on machine vision, which completes the defect detection of the outer wall of the capacitor element through a fixed side wall camera and a rotating side wall detection cylinder, thereby realizing the function of visual rapid defect detection, improving the final product qualification rate, reducing the requirements for manual operation, and improving the detection and identification efficiency.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a machine vision-based capacitor appearance defect rapid identification system, comprising: a workbench, an upper plate is horizontally arranged above the workbench; a material distribution plate, the material distribution plate is horizontally arranged on the top of the upper plate, and is connected to the upper plate through a material distribution motor, and the material distribution plate is provided with a plurality of longitudinally penetrating material distribution holes along the circumference of the edge ring; the upper plate is provided with a longitudinally penetrating material drop hole corresponding to any one of the material distribution holes; a vibration plate, the vibration plate is fixedly arranged on the top of the upper plate on one side away from the drop hole, and is provided with an arc-shaped discharge pipe, the free end of the discharge pipe is vertically downward, and is connected to any one of the material distribution holes The material distribution hole corresponds to; a side wall detection cylinder, which is a transparent round tube structure vertically arranged between the discharge pipe and the material distribution plate, and a detection channel is longitudinally penetrated in the center, and a detection motor is arranged between the side wall detection cylinder and the upper plate; a side wall camera, which is fixedly connected to the upper plate through a bracket and faces the bottom side wall of the side wall detection cylinder; a first material collection trough, which is arranged below the upper plate and corresponds to the material drop hole; a controller, the material distribution motor, the vibration plate, the detection motor and the side wall camera are electrically connected to the controller respectively, and the controller is provided with a buzzer.

[0005] Preferably, it also includes a second material collection trough arranged in parallel with the first material collection trough; an electric slide on the top of the workbench, the first material collection trough and the second material collection trough are both arranged on a slider of the electric slide; and the electric slide is electrically connected to the controller.

[0006] Preferably, it also includes an upper camera arranged above the material distribution tray, and a lower camera arranged below the material distribution tray; the upper camera and the lower camera respectively correspond to any one of the material distribution holes; the upper camera is connected to the upper plate through a bracket, the lower camera is fixedly connected to the bottom of the upper plate, and the upper plate is provided with a transparent detection window corresponding to the lower camera; the upper camera and the lower camera are respectively electrically connected to the controller.

[0007] Preferably, an encoder is provided between the material distribution tray and the upper plate, and the encoder is electrically connected to the controller.

[0008] Preferably, a column is provided on one side of the upper plate corresponding to the discharge pipe, a shaft sleeve matching the side wall detection cylinder is provided on the top of the column, and a gear is provided in the middle of the side wall detection cylinder, and the detection motor is fixedly connected to the column.

[0009] The beneficial effect of the present invention is that the recognition system can quickly identify the appearance of the chip capacitor element, so as to accurately detect the external structural defects of the capacitor element and improve the yield rate of the welding product. In the defect recognition process, the staff only needs to pour the bulk capacitor elements into the vibration plate and start the equipment through the controller. At this time, the bulk capacitor elements are neatly arranged under the action of the vibration plate and transported to the side wall detection cylinder through the discharge pipe, wherein the internal structure of the discharge pipe and the detection channel is adapted to the cross-sectional profile of the capacitor element, thereby constraining the posture of the capacitor element during the transmission process, that is, the capacitor element is arranged longitudinally in the side wall detection cylinder. The detection motor drives the transparent side wall detection cylinder to rotate. The side wall camera collects the outer wall images of each capacitor element through the side wall detection cylinder, and uses the built-in image algorithm to perform image analysis and compare it with the reference image to obtain the comparison results of the four side walls of the capacitor element. When the comparison result is qualified, the controller drives the distribution plate to rotate through the distribution motor, and the thickness of the distribution plate is consistent with the height of the capacitor element. Therefore, the capacitor at the bottom of the side wall detection cylinder falls into the distribution hole and shifts with the distribution plate until it reaches the position of the drop hole and falls into the first collection trough, thereby completing the classification of qualified capacitor elements. The movable and transposed first collection trough and the second collection trough can collect capacitor elements with different detection results separately under the action of the controller. The upper camera and the lower camera respectively identify the upper and lower end faces of the capacitor element in the transportation process, and obtain the evaluation results through the image algorithm, so that the capacitor element is put into the first collection trough or the second collection trough according to the evaluation results to complete the sorting of the capacitor element. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0012] Figure 2 It is a top schematic diagram of the overall structure of the present invention;

[0013] Figure 3 It is a schematic diagram of the local structure of the upper plate of the present invention.

[0014] In the figure: 1. workbench; 2. upper plate; 3. material distribution plate; 4. material distribution hole; 5. material distribution motor; 6. material drop hole; 7. vibration plate; 8. discharge pipe; 9. side wall detection cylinder; 10. detection motor; 11. side wall camera; 12. first collection trough; 13. second collection trough; 14. electric slide; 15. upper end camera; 16. lower end camera; 17. detection window; 18. encoder; 19. column; 20. gear; 21. bushing; 22. waste trough. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] according to Figure 1 , Figure 2 , Figure 3 As shown, a system for rapid identification of capacitor appearance defects based on machine vision comprises: a workbench 1, an upper plate 2 is horizontally arranged above the workbench 1; a material distribution plate 3, the material distribution plate 3 is horizontally arranged on the top of the upper plate 2, and is connected to the upper plate 2 through a material distribution motor 5, and the material distribution plate 3 is provided with a plurality of longitudinally penetrating material distribution holes 4 along the circumference of the edge ring; the upper plate 2 is provided with a longitudinally penetrating blanking hole 6 corresponding to any one of the material distribution holes 4; a vibration plate 7, the vibration plate 7 is fixedly arranged on the top of the upper plate 2 away from the blanking hole 6, and is provided with an arc-shaped discharge pipe 8, the free end of the discharge pipe 8 is vertically downward, and corresponds to any one of the material distribution holes 4; side wall detection Cylinder 9, the side wall detection cylinder 9 is a transparent round tube structure vertically arranged between the discharge pipe 8 and the distribution plate 3, and a detection channel is longitudinally provided in the center, and a detection motor 10 is provided between the side wall detection cylinder 9 and the upper plate 2; a side wall camera 11, the side wall camera 11 is fixedly connected to the upper plate 2 through a bracket, and faces the bottom side wall of the side wall detection cylinder 9; a first collecting trough 12, the first collecting trough 12 is arranged below the upper plate 2, corresponding to the drop hole 6; a controller, the distribution motor 5, the vibration plate 7, the detection motor 10 and the side wall camera 11 are electrically connected to the controller respectively, and the controller is provided with a buzzer.

[0017] Among them, a column 19 is provided on one side of the upper plate 2 corresponding to the discharge pipe 8, a shaft sleeve 21 is provided at the top of the column 19 to match the side wall detection cylinder 9, and a gear 20 is sleeved in the middle of the side wall detection cylinder 9, and the detection motor 10 is fixedly connected to the column 19. An encoder 18 is provided between the material distribution plate 3 and the upper plate 2, and the encoder 18 is electrically connected to the controller.

[0018] The recognition system in the above-mentioned setting can perform rapid appearance recognition and detection on patch-type capacitor elements, thereby accurately detecting external structural defects of capacitor elements and improving the yield rate of welding products. In the defect recognition process, the staff only needs to pour the bulk capacitor elements into the vibration plate 7 and start the equipment through the controller. At this time, the bulk capacitor elements are neatly arranged under the action of the vibration plate 7 and transported to the side wall detection cylinder 9 through the discharge pipe 8, wherein the internal structure of the discharge pipe 8 and the detection channel is adapted to the cross-sectional profile of the capacitor element, thereby constraining the posture of the capacitor element during the transmission process, that is, it is arranged vertically in the side wall detection cylinder 9, and the detection The motor 10 drives the transparent side wall detection tube 9 to rotate, and the side wall camera 11 collects the outer wall images of each capacitor element through the side wall detection tube, and uses the built-in image algorithm to perform image analysis and compare it with the reference image, thereby obtaining the comparison results of the four side walls of the capacitor element. When the comparison result is qualified, the controller drives the distribution plate 3 to rotate through the distribution motor 5, and the thickness of the distribution plate 3 is consistent with the height of the capacitor element. Therefore, the capacitor at the bottom of the side wall detection tube 9 falls into the distribution hole 4, and shifts and changes position with the distribution plate 3 until it moves to the position of the drop hole 6, and falls into the first collection trough 12, thereby completing the induction of qualified capacitor elements. When the capacitor element photographed by the side wall camera 11 has an appearance defect, the controller emits a prompt sound through the buzzer, and suspends operation, and the staff confirms and handles it. In addition, in order to meet the requirements of full automation, the rotation angle control of the material distribution plate 3 can be realized under the action of the encoder 18. When a defective capacitor element falls into the material distribution hole 4, the controller rotates the material distribution plate 3 in the opposite direction through the material distribution motor 5 until the defective capacitor element is out of the support range of the upper plate 2 and falls into the waste trough 22. Then the controller restores the working direction of the material distribution plate 3 to continue the transfer action of the next capacitor element. Since the system completes the defect detection of the outer wall of the capacitor element through the fixed side wall camera 11 and the rotating side wall detection cylinder 9, the function of visual rapid defect detection is realized, which improves the final product qualification rate, reduces the requirements for manual operation, and improves the detection and recognition efficiency.

[0019] It also includes a second material collection trough 13 arranged in parallel with the first material collection trough 12; an electric slide 14 on the top of the workbench 1, and the first material collection trough 12 and the second material collection trough 13 are both arranged on a slider of the electric slide 14; the electric slide 14 is electrically connected to the controller.

[0020] Through the above solution, the movable first collecting trough 12 and the second collecting trough 13 can respectively collect the capacitive elements with different detection results under the action of the controller.

[0021] It also includes an upper camera 15 arranged above the material distribution tray 3, and a lower camera 16 arranged below the material distribution tray 3; the upper camera 15 and the lower camera 16 respectively correspond to any one of the material distribution holes 4; the upper camera 15 is connected to the upper plate 2 through a bracket, the lower camera 16 is fixedly connected to the bottom of the upper plate 2, and the upper plate 2 is provided with a transparent detection window 17 corresponding to the lower camera 16; the upper camera 15 and the lower camera 16 are respectively electrically connected to the controller.

[0022] In this setting, the upper camera 15 and the lower camera 16 respectively identify the upper and lower end faces of the capacitor elements in the transport process, and obtain evaluation results through image algorithms, so that the capacitor elements are placed in the first hopper 12 or the second hopper according to the evaluation results to complete the sorting of the capacitor elements.

[0023] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A machine vision-based capacitor appearance defect rapid identification system, characterized in that: include: A workbench (1), wherein an upper plate (2) is horizontally arranged above the workbench (1); A material distribution plate (3), the material distribution plate (3) is horizontally arranged on the top of the upper plate (2) and connected to the upper plate (2) via a material distribution motor (5); the material distribution plate (3) is provided with a plurality of longitudinally penetrating material distribution holes (4) along the circumference of the edge ring; the upper plate (2) is provided with a longitudinally penetrating material drop hole (6) corresponding to any one of the material distribution holes (4); A vibration plate (7), the vibration plate (7) is fixedly arranged on the top of the upper plate (2) on a side away from the drop hole (6), and is provided with an arc-shaped discharge pipe (8), the free end of the discharge pipe (8) is vertically downward and corresponds to any one of the distribution holes (4); A side wall detection cylinder (9), the side wall detection cylinder (9) is a transparent round tube structure vertically arranged between the discharge pipe (8) and the material distribution plate (3), and a detection channel is longitudinally provided in the center, and a detection motor (10) is provided between the side wall detection cylinder (9) and the upper plate (2); A side wall camera (11), the side wall camera (11) being fixedly connected to the upper plate (2) via a bracket and facing the bottom side wall of the side wall detection cylinder (9); A first material collecting trough (12), the first material collecting trough (12) being arranged below the upper plate (2) and corresponding to the material dropping hole (6); The material distribution motor (5), the vibration plate (7), the detection motor (10) and the side wall camera (11) are electrically connected to the controller respectively, and the controller is provided with a buzzer.

2. According to claim 1, a capacitor appearance defect rapid identification system based on machine vision is characterized by: It also includes a second material collecting trough (13) arranged in parallel with the first material collecting trough (12); an electric slide (14) on the top of the workbench (1), the first material collecting trough (12) and the second material collecting trough (13) are both arranged on a slider of the electric slide (14); the electric slide (14) is electrically connected to the controller.

3. The capacitor appearance defect rapid identification system based on machine vision according to claim 1 is characterized by: It also includes an upper camera (15) arranged above the material distribution plate (3), and a lower camera (16) arranged below the material distribution plate (3); the upper camera (15) and the lower camera (16) respectively correspond to any one of the material distribution holes (4); the upper camera (15) is connected to the upper plate (2) through a bracket, the lower camera (16) is fixedly connected to the bottom of the upper plate (2), and the upper plate (2) is provided with a transparent detection window (17) corresponding to the lower camera (16); the upper camera (15) and the lower camera (16) are respectively electrically connected to the controller.

4. The system for quickly identifying capacitor appearance defects based on machine vision according to claim 1 is characterized in that: An encoder (18) is provided between the material distribution plate (3) and the upper plate (2), and the encoder (18) is electrically connected to the controller.

5. The system for quickly identifying capacitor appearance defects based on machine vision according to claim 1 is characterized in that: A column (19) is provided on one side of the upper plate (2) corresponding to the discharge pipe (8), a shaft sleeve (21) matching with the side wall detection cylinder (9) is provided at the top of the column (19), and a gear (20) is provided in the middle of the side wall detection cylinder (9), and the detection motor (10) is fixedly connected to the column (19).

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