A device for detecting surface defects of capacitors

Abstract

The present invention discloses a capacitor surface defect detection device, which relates to the technical field of capacitor surface defect detection. The device comprises an illumination box and a suspension mechanism. A conveyor belt is provided inside the illumination box, and the suspension mechanisms are evenly spaced on the surface of the conveyor belt. A transverse elastic piston rod is provided on the bottom side of the oil box. The device utilizes a flexible suspension clamp to enable the capacitor body to be transported and moved in an assembly line manner. Each capacitor body is photographed twice. During the photographing process on both sides, a pressure ramp is used to press down the vertical elastic piston rod as the capacitor body moves, causing the connecting shaft to rotate with the flexible cotton sleeve to change the clamping position of the capacitor body. By taking a second image and detecting the original clamping position that has been exposed, the capacitor body can be fully inspected for scratches, thereby preventing the clamping position from obscuring scratches and causing missed detection.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitor surface defect detection, and in particular to a capacitor surface defect detection device. Background Art

[0002] The length, width and height of film capacitors can reach 200mm×100mm×300mm. The main purpose of surface defect detection of film capacitors is to ensure product quality and reliability, so as to prevent film capacitors from being affected by surface scratches, damage and other reasons.

[0003] When using an optical camera to inspect scratches on both sides of a capacitor, the capacitor must be turned over, which requires a turning device or manual clamping, which can easily cause mechanical scratches on the capacitor surface. Alternatively, the capacitor must be clamped and suspended, and two optical cameras set opposite each other are used to simultaneously inspect scratches on both sides of the suspended capacitor. However, when the capacitor is suspended, the clamping method will partially block the capacitor surface, making it difficult to inspect the blocked area.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a capacitor surface defect detection device is proposed. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention provides a capacitor surface defect detection device, which solves the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a capacitor surface defect detection device, comprising an illumination box and a suspension mechanism, a conveyor belt is passed through the interior of the illumination box, and the suspension mechanism is equidistantly distributed on the surface of the conveyor belt, the suspension mechanism comprises an oil box, a vertical elastic piston rod, a roller, a transverse elastic piston rod, a rack, a gear, a connecting shaft, a flexible cotton sleeve, a connecting frame, a micro push rod and a pressure slope, the top of the oil box is penetrated by a vertical elastic piston rod, and the top of the vertical elastic piston rod is connected to the roller, the bottom side of the oil box is penetrated by a transverse elastic piston rod, and racks are provided on both sides of the transverse elastic piston rod, the side of the rack is provided with a gear, and the bottom of the gear is fixed with a connecting shaft, the outer wall of the connecting shaft is provided with a flexible cotton sleeve, the top surface of the gear is rotatably connected to the connecting frame, and the middle part of the side of the connecting frame is connected to a micro push rod, and the top of the inner wall of the illumination box is provided with a pressure slope.

[0007] Furthermore, there are two micro push rods, and the micro push rods are symmetrically fixed to the bottom surface of the oil box.

[0008] Furthermore, a capacitor body is arranged between the flexible cotton sleeves, and the right side of the capacitor body protrudes from the side surface of the flexible cotton sleeve on the right side.

[0009] Furthermore, the bottom surface of the pressure ramp is at a height lower than the top surface of the roller, and the roller and the pressure ramp are distributed on the same straight line.

[0010] Furthermore, a first optical camera is fixedly provided on one side of the light box, and a second optical camera is fixedly provided on the other side of the light box.

[0011] Furthermore, a background plate assembly is provided inside the light box, and the background plate assembly includes a first background plate and a second background plate, and the first background plate and the second background plate are symmetrically distributed about the central axis of the pressure slope member.

[0012] Furthermore, the background plate assembly further includes a first shooting hole, and the first shooting hole is opened on the surface of the first background plate.

[0013] Furthermore, two first shooting holes are provided, and the shooting range of the first optical camera accommodates two of the first shooting holes at the same time.

[0014] Furthermore, the background plate assembly further includes a second shooting hole, and the second shooting hole is opened on the surface of the second background plate.

[0015] Furthermore, two second shooting holes are provided, and the second shooting holes and the first shooting holes are staggered, and the shooting range of the second optical camera accommodates two of the second shooting holes at the same time.

[0016] The present invention provides a device for detecting surface defects of capacitors, which has the following beneficial effects:

[0017] 1. This capacitor surface defect detection device utilizes a flexible, suspended clamping mechanism to enable assembly-line transport and movement of the capacitor body. It also enables simultaneous scratch inspection on both sides, significantly improving inspection efficiency. Furthermore, the present invention photographs each capacitor body twice. During the photographing process, a pressure ramp depresses a vertical elastic piston rod as the capacitor body moves, causing the connecting shaft, carrying the flexible cotton sleeve, to rotate, thereby changing the clamping position of the capacitor body. By capturing the image a second time and inspecting the exposed original clamping position, comprehensive scratch inspection of the capacitor body can be achieved, preventing missed inspections due to scratches being obscured by the clamping position.

[0018] 2. The capacitor surface defect detection device sets a first background plate and a second background plate on both sides of the pressure slope, and the capacitor body is located between the first background plate and the second background plate for transmission, so that the capacitor body is photographed when passing through the first shooting hole and the second shooting hole in sequence. When the first optical camera and the second optical camera are shooting, the opposite light source is blocked by the non-hole parts of the first background plate and the second background plate, which helps prevent the opposite light source from interfering with the imaging effect, thereby indirectly improving the imaging clarity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the external structure of an illumination box of a capacitor surface defect detection device according to the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of an oil box of a capacitor surface defect detection device according to the present invention;

[0021] Figure 3 This is a schematic diagram of the flexible cotton sleeve structure of a capacitor surface defect detection device of the present invention;

[0022] Figure 4 This is a schematic structural diagram of a first background plate of a capacitor surface defect detection device according to the present invention;

[0023] Figure 5 This is a schematic structural diagram of a second background plate of a capacitor surface defect detection device according to the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of a pressure slope component of a capacitor surface defect detection device of the present invention.

[0025] In the figure: 1. Lighting box; 2. Conveyor belt; 3. Suspension mechanism; 301. Oil box; 302. Vertical elastic piston rod; 303. Roller; 304. Horizontal elastic piston rod; 305. Rack; 306. Gear; 307. Connecting shaft; 308. Flexible cotton sleeve; 309. Connecting frame; 310. Micro push rod; 311. Pressure slope; 4. Capacitor body; 5. First optical camera; 6. Second optical camera; 7. Background plate assembly; 701. First background plate; 702. Second background plate; 703. First shooting hole; 704. Second shooting hole. DETAILED DESCRIPTION

[0026] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0027] like Figures 1-6As shown, the present invention provides a technical solution: a capacitor surface defect detection device, including an illumination box 1 and a suspension mechanism 3, a conveyor belt 2 is passed through the interior of the illumination box 1, and the suspension mechanism 3 is equidistantly distributed on the surface of the conveyor belt 2, and the suspension mechanism 3 includes an oil box 301, a vertical elastic piston rod 302, a roller 303, a transverse elastic piston rod 304, a rack 305, a gear 306, a connecting shaft 307, a flexible cotton sleeve 308, a connecting frame 309, a micro push rod 310 and a pressure slope 311, a vertical elastic piston rod 302 is passed through the top of the oil box 301, and the top of the vertical elastic piston rod 302 is connected to the roller 303, a transverse elastic piston rod 304 is passed through the side surface of the bottom of the oil box 301, and racks 305 are provided on both sides of the transverse elastic piston rod 304, and gears 306 are provided on the side surface of the rack 305, and A connecting shaft 307 is fixed to the bottom of the gear 306, and a flexible cotton sleeve 308 is provided on the outer wall of the connecting shaft 307. The top surface of the gear 306 is rotatably connected to a connecting frame 309, and a micro push rod 310 is connected to the middle part of the side of the connecting frame 309. A pressure slope 311 is provided on the top of the inner wall of the illumination box 1. There are two micro push rods 310 in total, and the micro push rods 310 are symmetrically fixed to the bottom surface of the oil box 301. A capacitor body 4 is provided between the flexible cotton sleeves 308, and the right side of the capacitor body 4 protrudes from the side surface of the flexible cotton sleeve 308 on the right side. The bottom surface of the pressure slope 311 is at a height lower than the top surface of the roller 303, and the roller 303 and the pressure slope 311 are distributed on the same straight line. A first optical camera 5 is fixedly provided on one side of the illumination box 1, and a second optical camera 6 is fixedly provided on the other side of the illumination box 1.

[0028] The specific operation is as follows: First, the capacitor body 4 to be scratch tested needs to be suspended and clamped. Specifically, the capacitor body 4 is manually raised in the loading area so that its top is located between the connecting shafts 307. At this time, the micro push rod 310 is extended to make the opposite connecting shafts 307 approach each other, thereby flexibly clamping the top of the capacitor body 4 through the flexible cotton sleeve 308. At this time, it should be noted that when clamping, the right side of the capacitor body 4 should be significantly protruding from the side of the flexible cotton sleeve 308 on the right side;

[0029] The suspended and clamped capacitor body 4 is then transported to the interior of the light box 1 via the conveyor belt 2, and then the first optical camera 5 and the second optical camera 6 take the first pictures of both sides of the capacitor body 4 in sequence;

[0030] After the first shot, the capacitor body 4 and the oil box 301 continue to be transported. When the roller 303 contacts the pressure slope 311, the pressure slope 311 applies downward pressure to the roller 303, so that the vertical elastic piston rod 302 is pressed into the interior of the oil box 301. As a result, the transmission medium inside the oil box 301 pushes the horizontal elastic piston rod 304 and the rack 305 to extend. The rack 305 drives the gear 306 to rotate through translation. The gears 306 that are relatively distributed transmit power in opposite directions. As a result, the connecting shaft 307 carries the flexible cotton sleeve 308, which drives the capacitor body 4 to transmit power while maintaining the capacitor body 4 clamped, thereby changing the clamping position.

[0031] After the clamping position of the capacitor body 4 is moved and changed, the first optical camera 5 and the second optical camera 6 take a second photograph of both sides of the capacitor body 4 in sequence. The two photographed images are uploaded to the image processing host. The image processing host performs a scratch inspection on both sides of the capacitor body 4 taken in the first photograph, naturally avoiding the clamping position in the first photograph. When the image processing host performs a scratch inspection on both sides of the capacitor body 4 taken in the second photograph, due to the change in the clamping position, the image processing host focuses on whether there are scratches at the original clamping position in the inspection image.

[0032] Based on the above description, the present invention flexibly suspends and clamps the capacitor body 4 so that it can be transported and moved in an assembly line manner, and can simultaneously perform scratch detection on both sides to greatly improve the detection efficiency. In addition, the present invention photographs each capacitor body 4 twice. During the photographing process on both sides, the vertical elastic piston rod 302 is pressed down by the pressure slope 311 as the capacitor body 4 moves, so that the connecting shaft 307 rotates with the flexible cotton sleeve 308 to change the clamping part of the capacitor body 4. Therefore, by taking the image for the second time and detecting the original clamping part that has been exposed, a comprehensive scratch detection of the capacitor body 4 can be achieved to prevent the clamping part from blocking the scratches and causing missed detection.

[0033] like Figures 1-6As shown, a background plate assembly 7 is provided inside the light box 1. The background plate assembly 7 includes a first background plate 701 and a second background plate 702. The first background plate 701 and the second background plate 702 are symmetrically distributed about the central axis of the pressure slope 311. The background plate assembly 7 also includes a first shooting hole 703. The first background plate 701 has a first shooting hole 703 formed on its surface. There are two first shooting holes 703, and the first optical camera 5 has two first shooting holes 703 at the same time. The background plate assembly 7 also includes a second shooting hole 704. The second background plate 702 has a second shooting hole 704 formed on its surface. There are two second shooting holes 704, and the second shooting holes 704 are staggered with the first shooting hole 703. In addition, the second optical camera 6 has two second shooting holes 704 at the same time.

[0034] The specific operation is as follows: after the capacitor body 4 enters the light box 1, both sides of the capacitor body 4 need to be illuminated to provide a good detection environment. As a result, the first optical camera 5 and the second optical camera 6 arranged opposite each other are easily affected by the opposite light source and the imaging effect is affected. Therefore, a first background plate 701 and a second background plate 702 are provided on both sides of the pressure slope 311. The surfaces of the first background plate 701 and the second background plate 702 are provided with first shooting holes 703 and second shooting holes 704 with staggered distribution. The specific distribution according to the transmission line is as follows: first shooting hole 703, second shooting hole 704, first shooting hole 703, second shooting hole 704;

[0035] The first optical camera 5 and the second optical camera 6 are wide-angle cameras, and there will be an angle tilt when imaging. Therefore, the image processing host needs to perform angle compensation. Image angle compensation is a prior art. When the first optical camera 5 captures one side of the complete capacitor body 4 through the first shooting hole 703, since the other side of the capacitor body 4 is the second background plate 702, the illumination of the opposite light source can be prevented from interfering with the imaging effect of the first optical camera 5. Similarly, when the second optical camera 6 captures one side of the complete capacitor body 4 through the second shooting hole 704, since the other side of the capacitor body 4 is the first background plate 701, the illumination of the opposite light source can be prevented from interfering with the imaging effect of the second optical camera 6.

[0036] Based on the above description, the present invention sets a first background plate 701 and a second background plate 702 on both sides of the pressure slope 311, and the capacitor body 4 is located between the first background plate 701 and the second background plate 702 for transmission, so that the capacitor body 4 is photographed when passing through the first shooting hole 703 and the second shooting hole 704 in sequence, and when the first optical camera 5 and the second optical camera 6 shoot, the opposite light source is blocked by the non-hole parts of the first background plate 701 and the second background plate 702, which is beneficial to prevent the opposite light source from interfering with the imaging effect, thereby improving the imaging clarity in disguise.

[0037] In summary, when using the capacitor surface defect detection device, it is first necessary to perform a hanging clamping on the capacitor body 4 to be inspected for scratches. Specifically, the capacitor body 4 is manually erected in the loading area so that its top is located between the connecting shafts 307. At this time, the micro push rod 310 is extended to make the opposite connecting shafts 307 close to each other, thereby flexibly clamping the top of the capacitor body 4 through the flexible cotton sleeve 308. At this time, it should be noted that when clamping, the right side of the capacitor body 4 should be significantly protruding from the side of the flexible cotton sleeve 308 on the right side;

[0038] The suspended and clamped capacitor body 4 is then transported to the interior of the light box 1 via the conveyor belt 2, and then the first optical camera 5 and the second optical camera 6 take the first pictures of both sides of the capacitor body 4 in sequence;

[0039] After the first shot, the capacitor body 4 and the oil box 301 continue to be transported. When the roller 303 contacts the pressure slope 311, the pressure slope 311 applies downward pressure to the roller 303, so that the vertical elastic piston rod 302 is pressed into the interior of the oil box 301. As a result, the transmission medium inside the oil box 301 pushes the horizontal elastic piston rod 304 and the rack 305 to extend. The rack 305 drives the gear 306 to rotate through translation. The gears 306 that are relatively distributed transmit power in opposite directions. As a result, the connecting shaft 307 carries the flexible cotton sleeve 308, which drives the capacitor body 4 to transmit power while maintaining the capacitor body 4 clamped, thereby changing the clamping position.

[0040] After the clamping position of the capacitor body 4 is moved and changed, the first optical camera 5 and the second optical camera 6 take a second photograph of both sides of the capacitor body 4 in sequence. The two photographed images are uploaded to the image processing host. The image processing host performs a scratch inspection on both sides of the capacitor body 4 taken in the first photograph, naturally avoiding the clamping position in the first photograph. When the image processing host performs a scratch inspection on both sides of the capacitor body 4 taken in the second photograph, due to the change in the clamping position, the image processing host focuses on whether there are scratches at the original clamping position in the inspection image.

[0041] A first background plate 701 and a second background plate 702 are provided on both sides of the pressure slope member 311. The surfaces of the first background plate 701 and the second background plate 702 are provided with staggered first shooting holes 703 and second shooting holes 704. The distribution of the first shooting hole 703, the second shooting hole 704, the first shooting hole 703, and the second shooting hole 704 is as follows according to the specific distribution of the transmission line.

[0042] The first optical camera 5 and the second optical camera 6 are wide-angle cameras, and there will be an angle tilt when imaging. Therefore, the image processing host needs to perform angle compensation. Image angle compensation is a conventional technology. When the first optical camera 5 captures one side of the complete capacitor body 4 through the first shooting hole 703, since the other side of the capacitor body 4 is the second background plate 702, the illumination of the opposite light source can be prevented from interfering with the imaging effect of the first optical camera 5. Similarly, when the second optical camera 6 captures one side of the complete capacitor body 4 through the second shooting hole 704, since the other side of the capacitor body 4 is the first background plate 701, the illumination of the opposite light source can be prevented from interfering with the imaging effect of the second optical camera 6.

[0043] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. A capacitor surface defect detection device, comprising an illumination box (1) and a suspension mechanism (3), characterized in that: The interior of the illumination box (1) is provided with a conveyor belt (2), and the suspension mechanism (3) is equidistantly distributed on the surface of the conveyor belt (2). The suspension mechanism (3) comprises an oil box (301), a vertical elastic piston rod (302), a roller (303), a transverse elastic piston rod (304), a rack (305), a gear (306), a connecting shaft (307), a flexible cotton sleeve (308), a connecting frame (309), a micro push rod (310) and a pressure slope (311). The top of the oil box (301) is provided with a vertical elastic piston rod (302), and the top of the vertical elastic piston rod (302) is connected to the roller (303). The bottom side of the oil box (301) is provided with a transverse elastic piston rod ( 304), and racks (305) are provided on both sides of the transverse elastic piston rod (304), a gear (306) is provided on the side of the rack (305), and a connecting shaft (307) is fixed to the bottom of the gear (306), and the outer wall of the connecting shaft (307) is provided with a flexible cotton sleeve (308), the top surface of the gear (306) is rotatably connected to a connecting frame (309), and a micro push rod (310) is connected to the middle of the side of the connecting frame (309), and a pressure slope (311) is provided on the top of the inner wall of the light box (1), the bottom surface of the pressure slope (311) is at a height lower than the top surface of the roller (303), and the roller (303) and the pressure slope (311) are distributed on the same straight line.

2. The capacitor surface defect detection device according to claim 1, characterized in that: Two micro push rods (310) are provided in total, and the micro push rods (310) are symmetrically fixed to the bottom surface of the oil box (301).

3. The capacitor surface defect detection device according to claim 1, characterized in that: A capacitor body (4) is provided between the flexible cotton sleeves (308), and the right side of the capacitor body (4) protrudes from the side surface of the flexible cotton sleeve (308) on the right side.

4. The capacitor surface defect detection device according to claim 1, characterized in that: A first optical camera (5) is fixedly provided on one side of the illumination box (1), and a second optical camera (6) is fixedly provided on the other side of the illumination box (1).

5. The capacitor surface defect detection device according to claim 4, characterized in that: A background plate assembly (7) is provided inside the illumination box (1), and the background plate assembly (7) comprises a first background plate (701) and a second background plate (702), wherein the first background plate (701) and the second background plate (702) are symmetrically distributed about the central axis of the pressure slope member (311).

6. The capacitor surface defect detection device according to claim 5, characterized in that: The background plate assembly (7) further comprises a first shooting hole (703), and the first shooting hole (703) is provided on the surface of the first background plate (701).

7. The capacitor surface defect detection device according to claim 6, characterized in that: Two first shooting holes (703) are provided, and the shooting range of the first optical camera (5) simultaneously accommodates the two first shooting holes (703).

8. The capacitor surface defect detection device according to claim 7, characterized in that: The background plate assembly (7) further comprises a second shooting hole (704), and the second shooting hole (704) is provided on the surface of the second background plate (702).

9. The capacitor surface defect detection device according to claim 8, characterized in that: Two second shooting holes (704) are provided, and the second shooting holes (704) and the first shooting holes (703) are staggered, and the shooting range of the second optical camera (6) simultaneously accommodates two second shooting holes (704).

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