Product defect detection system based on visual inspection and method thereof

Abstract

The application relates to the technical field of detection, and discloses a product defect detection system and method based on visual detection, which comprises an operation table, a conveying assembly is transmissionally connected to the middle part of the operation table, and a poking assembly is fixedly installed at the top end of the operation table; the conveying assembly comprises conveying rollers which are rotationally connected to the left and right sides of the operation table, the surfaces of the conveying rollers are transmissionally connected with conveying belts, and a gear shaft is rotationally connected to the middle part of the operation table. The gear shaft is driven to rotate by a motor, and then the conveying belt is rotated, the electronic product circuit board placed at the right end of the conveying belt is conveyed to the left, at the same time, the rotation of the gear shaft drives the brush shaft to rotate through the belt transmission assembly two, and then the brush shaft is rotated on the circuit board at a high speed, the contact between the brush on the brush shaft and the circuit board is utilized to poke the welding points, then the virtual welding points are poked apart, the influence on subsequent visual detection is avoided, and the detection precision is improved.

Description

Technical Field

[0001] This invention relates to the field of inspection technology, and more specifically, to a product defect detection system and method based on visual inspection. Background Technology

[0002] After the electronic product circuit board is soldered, a vision-based product defect detection system is needed to ensure the soldering quality. This system uses a camera to take pictures of the solder joints of the electronic product and analyzes the images to determine whether there are any mis-soldering, missing soldering, or other defects. However, in the current technology, most cameras are placed directly above the conveyor belt and take pictures of the electronic product from below. In actual use, if there is a cold solder joint, the solder joint will still be located at the soldering position, and direct shooting cannot determine whether there is a cold solder joint, thus reducing the accuracy of the detection. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides a product defect detection system and method based on visual inspection, which has the advantage of high detection accuracy.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a product defect detection system based on visual inspection, including an operating table, a conveying component being drivenly connected to the middle of the operating table, and a toggle component being fixedly installed at the top of the operating table; The conveying assembly includes a conveying roller, which is rotatably connected to the left and right sides of the operating table. A conveyor belt is driven to the surface of the conveying roller. A gear shaft is rotatably connected to the middle of the operating table. A motor is fixedly installed at the rear end of the operating table. A drive gear is fixedly sleeved at the output end of the motor. The actuating assembly includes a brush shaft, which is rotatably connected to the right end of the operating table. The brush shaft is located above and in contact with the conveyor belt. A belt drive assembly is connected between the front end of the brush shaft and the front end of the gear shaft.

[0005] As a preferred embodiment of the present invention, a belt drive assembly is provided between the conveying roller on the right side and the gear shaft, and a drive groove is provided at the rear end of the conveying roller on the right side.

[0006] As a preferred embodiment of the present invention, the actuating assembly further includes a pressure roller, which is fixedly installed on the top of the operating table and is located above the conveyor belt but does not contact the conveyor belt.

[0007] As a preferred embodiment of the present invention, an air supply assembly is fixedly installed at the front end of the operating table. The air supply assembly includes an air box, which is fixedly installed at the top of the inner cavity of the operating table. A rotating disk is fixedly installed at the front end of the gear shaft. A connecting rod is fixedly installed in the middle of the rotating disk. A connecting rod is rotatably connected to the surface of the connecting rod. A push plate is movably connected to the inner cavity of the air box. A one-way air inlet pipe and a one-way air outlet pipe are fixedly installed at the left end of the air box. The one-way air inlet pipe is located below the one-way air outlet pipe.

[0008] As a preferred embodiment of the present invention, a telescopic rod is fixedly installed between the right end of the push plate and the air box, and the left end of the connecting rod is rotatably connected to the push plate.

[0009] As a preferred embodiment of the present invention, a switching component is fixedly installed on the top of the operating table. The switching component includes a fixing box, which is fixedly installed on the top of the operating table. A vertical tube is fixedly installed on the top of the fixing box, and a connecting tube is fixedly installed on the top of the vertical tube. A limit ring is fixedly installed in the inner cavity of the connecting tube, and a pull rod is slidably connected to the inner cavity of the connecting tube. The pull rod is located in front of the limit ring, and the vertical tube is located behind the limit ring.

[0010] As a preferred embodiment of the present invention, a pressure relief valve is fixedly installed on the top of the fixing box.

[0011] As a preferred embodiment of the present invention, a shooting component is fixedly installed on the top of the operating table. The shooting component includes an arc-shaped support frame, which is fixedly installed on the top of the operating table. Positioning plates are placed on both the upper and lower sides of the arc-shaped support frame. A placement tube is fixedly installed in the middle of the positioning plate. A camera is placed in the inner cavity of the placement tube. An extension rod is fixed to the right end of the placement tube. A waist-shaped frame is movably connected to the right end of the extension rod. An extension rod is fixed to the front end of the waist-shaped frame. A push shaft is movably connected to the top of the connecting tube. A spring is sleeved on the surface of the push shaft.

[0012] The detection method of a product defect detection system based on vision inspection includes the following steps: The electronic product circuit board is placed on the toggle assembly and transported by the conveyor assembly. The toggle assembly cleans the circuit board and moves the solder joints. When the circuit board is transported to the bottom of the imaging assembly, the conveyor assembly stops transporting the circuit board. The gas in the gas supply assembly enters the switching assembly, and the switching assembly drives the imaging assembly to swing and capture images of the circuit board for comparison and detection.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses a motor to drive a gear shaft to rotate, which in turn drives a conveyor belt to rotate, transporting the electronic product circuit board placed on the right end of the conveyor belt to the left. At the same time, the rotation of the gear shaft drives a brush shaft to rotate through a belt drive assembly, which in turn drives the brush shaft to rotate on the circuit board at a relatively fast speed. The brush on the brush shaft contacts the circuit board to pry open the solder joints, thereby removing any poorly soldered solder joints and avoiding affecting subsequent visual inspection, thus improving the accuracy of the inspection.

[0014] 2. This invention uses a gear shaft to rotate a rotating disk, which in turn pulls a push plate back and forth via a connecting rod, delivering gas into a fixed box. Pulling the pull rod forward so it's positioned in front of the vertical tube allows compressed gas in the fixed box to enter the connecting pipe. Pushing the push shaft backward compresses the spring and moves the waist-shaped frame backward. This backward movement of the waist-shaped frame moves the extension rod, placement tube, and positioning plate backward, causing the camera to swing and capture images of the circuit board from multiple angles. This ensures comprehensive imaging of solder joints and allows for the testing of electronic products of different specifications while simultaneously capturing images from multiple angles, thus expanding the device's application range. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the operating table of the present invention; Figure 3 This is a schematic diagram of the exploded connection of the structural components of the present invention; Figure 4 This is a schematic diagram of the explosive connection of the tie rod in the structure of the present invention; Figure 5 This is a cross-sectional schematic diagram of the air box structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged diagram of point A in the middle.

[0016] In the diagram: 1. Control panel; 2. Conveying assembly; 21. Conveying roller; 22. Conveying belt; 23. Motor; 24. Drive gear; 25. Gear shaft; 26. Belt drive assembly one; 3. Actuating assembly; 31. Brush shaft; 32. Belt drive assembly two; 33. Pressure roller; 4. Air supply assembly; 41. Air box; 42. Rotary disc; 43. Connecting rod; 44. Linkage rod; 45. Push plate; 46. Telescopic rod; 47. One-way air inlet pipe; 48. One-way air outlet pipe; 5. Switching assembly; 51. Connecting pipe; 52. Pull rod; 53. Limiting ring; 54. Vertical pipe; 55. Fixing box; 6. Pressure relief valve; 7. Shooting assembly; 71. Arc-shaped support frame; 72. Positioning plate; 73. Placement tube; 74. Camera; 75. Extension rod; 76. Waist-shaped frame; 77. Connecting rod; 78. Push shaft; 79. Spring. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figures 1 to 6 As shown, the present invention provides a product defect detection system based on vision inspection, including an operating table 1, a conveying component 2 connected to the middle of the operating table 1, and a toggle component 3 fixedly installed at the top of the operating table 1. The conveying assembly 2 includes a conveying roller 21, which is rotatably connected to the left and right sides of the operating table 1. A conveyor belt 22 is connected to the surface of the conveying roller 21. A gear shaft 25 is rotatably connected to the middle of the operating table 1. A motor 23 is fixedly installed at the rear end of the operating table 1. A drive gear 24 is fixedly sleeved at the output end of the motor 23. The actuating assembly 3 includes a brush shaft 31, which is rotatably connected to the right end of the operating table 1. The brush shaft 31 is located above and in contact with the conveyor belt 22. A belt drive assembly 32 is connected between the front end of the brush shaft 31 and the front end of the gear shaft 25.

[0019] The motor 23 drives the gear shaft 25 to rotate, which in turn drives the conveyor belt 22 to rotate, conveying the electronic product circuit board placed on the right end of the conveyor belt 22 to the left. At the same time, the rotation of the gear shaft 25 drives the brush shaft 31 to rotate through the belt drive assembly 32, which in turn drives the brush shaft 31 to rotate on the circuit board at a relatively fast speed. The brush on the brush shaft 31 contacts the circuit board to pry open the solder joints, thereby removing the poorly soldered solder joints and avoiding affecting subsequent visual inspection, thus improving the inspection accuracy.

[0020] The right conveyor roller 21 is connected to the gear shaft 25 by a belt drive assembly 26, and the rear end of the right conveyor roller 21 is provided with a drive groove.

[0021] By setting a transmission groove, the belt drive assembly 26 is hidden inside the conveyor roller 21, thus avoiding interference between the conveyor roller 21 and the conveyor belt 22.

[0022] The actuating assembly 3 also includes a pressure roller 33, which is fixedly installed on the top of the operating table 1. The pressure roller 33 is located above the conveyor belt 22 and does not contact the conveyor belt 22.

[0023] By setting pressure roller 33, when placing the circuit board of an electronic product on the conveyor belt 22, the circuit board is clamped by the edge of the pressure roller 33 under the pressure roller 33, and the rolling contact between the pressure roller 33 and the circuit board does not affect the transportation of the circuit board.

[0024] Among them, an air supply component 4 is fixedly installed at the front end of the operating table 1. The air supply component 4 includes an air box 41, which is fixedly installed at the top of the inner cavity of the operating table 1. A rotating disk 42 is fixedly installed at the front end of the gear shaft 25. A connecting rod 43 is fixedly installed in the middle of the rotating disk 42. A connecting rod 44 is rotatably connected to the surface of the connecting rod 43. A push plate 45 is movably connected to the inner cavity of the air box 41. A one-way air inlet pipe 47 and a one-way air outlet pipe 48 are fixedly installed at the left end of the air box 41. The one-way air inlet pipe 47 is located below the one-way air outlet pipe 48.

[0025] When the gear shaft 25 rotates, it can drive the rotating disk 42 to rotate, which in turn drives the connecting rod 43 to rotate around the axis of the rotating disk 42. The connecting rod 44 pulls the push plate 45 back and forth. When the push plate 45 moves to the right, it draws outside air into the air box 41 through the one-way air inlet pipe 47, and then sends it into the fixed box 55 through the one-way air outlet pipe 48.

[0026] A telescopic rod 46 is fixedly installed between the right end of the push plate 45 and the air box 41, and the left end of the connecting rod 44 is rotatably connected to the push plate 45.

[0027] The push plate 45 is supported and positioned by the telescopic rod 46 to prevent the push plate 45 from shifting or tilting during movement, thus ensuring normal gas flow.

[0028] The switching component 5 is fixedly installed on the top of the operating table 1. The switching component 5 includes a fixed box 55, which is fixedly installed on the top of the operating table 1. A vertical tube 54 is fixedly installed on the top of the fixed box 55. A connecting tube 51 is fixedly installed on the top of the vertical tube 54. A limit ring 53 is fixedly installed in the inner cavity of the connecting tube 51. A pull rod 52 is slidably connected in the inner cavity of the connecting tube 51. The pull rod 52 is located in front of the limit ring 53, and the vertical tube 54 is located behind the limit ring 53.

[0029] When the one-way vent pipe 48 continuously supplies air to the fixed box 55, the gas will be compressed inside the fixed box 55 because the pull rod 52 is in contact with the limiting ring 53, which closes the vertical pipe 54 and the connecting pipe 51. After the pull rod 52 is pulled forward and positioned in front of the vertical pipe 54, the compressed gas inside the fixed box 55 will enter the connecting pipe 51.

[0030] The top of the fixed box 55 is fixedly installed with a pressure relief valve 6.

[0031] By setting up a pressure relief valve 6, when the pressure inside the fixed box 55 reaches the opening pressure of the pressure relief valve 6, the pressure relief valve 6 will release pressure to prevent the pressure inside the fixed box 55 from continuing to increase and to ensure safety.

[0032] The top of the operating table 1 is fixedly equipped with a shooting component 7. The shooting component 7 includes an arc-shaped support frame 71, which is fixedly installed on the top of the operating table 1. Positioning plates 72 are placed on both the upper and lower sides of the arc-shaped support frame 71. A placement tube 73 is fixedly installed in the middle of the positioning plate 72. A camera 74 is placed in the inner cavity of the placement tube 73. An extension rod 75 is fixed to the right end of the placement tube 73. A waist-shaped frame 76 is movably connected to the right end of the extension rod 75. An extension rod 77 is fixed to the front end of the waist-shaped frame 76. A push shaft 78 is movably connected to the top of the connecting tube 51. A spring 79 is sleeved on the surface of the push shaft 78.

[0033] When gas enters the connecting pipe 51, it pushes the push shaft 78 backward, compresses the spring 79, and causes the waist-shaped frame 76 to move backward as a whole. After the waist-shaped frame 76 moves backward, it can cause the extension rod 75, the placement tube 73, and the positioning piece 72 to move backward as a whole, thereby causing the camera 74 to swing and take pictures of the circuit board from multiple angles. This ensures that the solder joints can be captured comprehensively. It can detect electronic products of different specifications while also taking pictures from multiple angles, increasing the scope of application of the device.

[0034] The detection method of a product defect detection system based on vision inspection includes the following steps: The electronic product circuit board is placed on the agitator 3 and transported by the conveyor 2. The agitator 3 cleans the circuit board and agitates the solder joints. When the circuit board reaches below the imaging component 7, the conveyor 2 stops transporting the circuit board, and the gas in the gas supply component 4 enters the switching component 5. The switching component 5 drives the imaging component 7 to swing and capture images of the circuit board for comparative detection. Working principle and usage process of this invention: The circuit board of the electronic product to be tested is placed on the right side of the conveyor belt 22 and locked under the pressure roller 33. The motor 23 drives the drive gear 24 to rotate. The drive gear 24 drives the gear shaft 25 to rotate through the meshing of the drive gear 24 and the gear shaft 25. When the gear shaft 25 rotates, it can drive the conveyor roller 21 to rotate through the belt drive assembly 26, thereby driving the circuit board to be conveyed to the left. When the gear shaft 25 rotates, it drives the brush shaft 31 to rotate through the belt drive assembly 32. The rotation speed of the brush shaft 31 is greater than that of the conveying roller 21. When the circuit board is conveyed to the bottom of the brush shaft 31, the rotating brush shaft 31 can clean the circuit board. When the brush shaft 31 comes into contact with the solder joint with poor soldering, it can move the solder joint to make it move. Furthermore, when the gear shaft 25 rotates, it drives the rotating disk 42 to rotate, which in turn drives the connecting rod 43 to rotate around the axis of the rotating disk 42. The connecting rod 44 pulls the push plate 45 back and forth. When the one-way air outlet pipe 48 continuously sends air to the fixed box 55, the gas is compressed and stored in the fixed box 55. When the pressure in the fixed box 55 reaches the opening pressure of the pressure relief valve 6, the pressure relief valve 6 will release pressure. Once the circuit board is delivered to the bottom of the shooting component 7, the motor 23 is de-energized and stops driving. Subsequently, after pulling the lever 52 forward so that it is in front of the vertical tube 54, the compressed gas in the fixing box 55 will enter the connecting tube 51. When the gas enters the connecting tube 51, it will push the push shaft 78 backward, compress the spring 79, and drive the waist frame 76 to move backward as a whole. After the waist frame 76 moves backward, it can drive the extension rod 75, the placement tube 73 and the positioning piece 72 to move backward as a whole, thereby driving the camera 74 to swing and take pictures of the circuit board from multiple angles to detect the solder joint quality. After the test is completed, see Figure 2 The connecting pipe 51 is also equipped with an angle valve. By opening the angle valve, the gas in the connecting pipe 51 is discharged. At this time, the elastic force of the spring 79 pushes the push shaft 78 back to its original position.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A product defect detection system based on vision inspection, comprising an operating console (1), characterized in that: The middle part of the operating table (1) is connected to a conveying assembly (2), and the top of the operating table (1) is fixedly installed with a toggle assembly (3). The conveying assembly (2) includes a conveying roller (21), which is rotatably connected to the left and right sides of the operating table (1). A conveyor belt (22) is connected to the surface of the conveying roller (21). A gear shaft (25) is rotatably connected to the middle of the operating table (1). A motor (23) is fixedly installed at the rear end of the operating table (1). A drive gear (24) is fixedly sleeved at the output end of the motor (23). The actuating component (3) includes a brush shaft (31), which is rotatably connected to the right end of the operating table (1). The brush shaft (31) is located above the conveyor belt (22) and in contact with the conveyor belt (22). A belt drive component (32) is connected between the front end of the brush shaft (31) and the front end of the gear shaft (25).

2. The product defect detection system based on vision inspection according to claim 1, characterized in that: A belt drive assembly (26) is connected between the right-side conveyor roller (21) and the gear shaft (25), and a drive groove is provided at the rear end of the right-side conveyor roller (21).

3. The product defect detection system based on vision inspection according to claim 1, characterized in that: The actuation assembly (3) also includes a pressure roller (33), which is fixedly installed on the top of the operating table (1). The pressure roller (33) is located above the conveyor belt (22) and does not contact the conveyor belt (22).

4. The product defect detection system based on vision inspection according to claim 1, characterized in that: An air supply assembly (4) is fixedly installed at the front end of the operating table (1). The air supply assembly (4) includes an air box (41). The air box (41) is fixedly installed at the top of the inner cavity of the operating table (1). A rotating disk (42) is fixedly installed at the front end of the gear shaft (25). A connecting rod (43) is fixedly installed in the middle of the rotating disk (42). A connecting rod (44) is rotatably connected to the surface of the connecting rod (43). A push plate (45) is movably connected to the inner cavity of the air box (41). A one-way air inlet pipe (47) and a one-way air outlet pipe (48) are fixedly installed at the left end of the air box (41). The one-way air inlet pipe (47) is located below the one-way air outlet pipe (48).

5. The product defect detection system based on vision inspection according to claim 4, characterized in that: A telescopic rod (46) is fixedly installed between the right end of the push plate (45) and the air box (41), and the left end of the connecting rod (44) is rotatably connected to the push plate (45).

6. The product defect detection system based on vision inspection according to claim 1, characterized in that: A switching component (5) is fixedly installed at the top of the operating table (1). The switching component (5) includes a fixing box (55). The fixing box (55) is fixedly installed at the top of the operating table (1). A vertical tube (54) is fixedly installed at the top of the fixing box (55). A connecting tube (51) is fixedly installed at the top of the vertical tube (54). A limit ring (53) is fixedly installed in the inner cavity of the connecting tube (51). A pull rod (52) is slidably connected in the inner cavity of the connecting tube (51). The pull rod (52) is located in front of the limit ring (53), and the vertical tube (54) is located behind the limit ring (53).

7. The product defect detection system based on vision inspection according to claim 6, characterized in that: A pressure relief valve (6) is fixedly installed on the top of the fixed box (55).

8. The product defect detection system based on vision inspection according to claim 6, characterized in that: A shooting component (7) is fixedly installed on the top of the operating table (1). The shooting component (7) includes an arc-shaped support frame (71). The arc-shaped support frame (71) is fixedly installed on the top of the operating table (1). Positioning pieces (72) are placed on both the upper and lower sides of the arc-shaped support frame (71). A placement tube (73) is fixedly installed in the middle of the positioning piece (72). A camera (74) is placed in the inner cavity of the placement tube (73). An extension rod (75) is fixed to the right end of the placement tube (73). A waist-shaped frame (76) is movably connected to the right end of the extension rod (75). An extension rod (77) is fixed to the front end of the waist-shaped frame (76). A push shaft (78) is movably connected to the top of the connecting tube (51). A spring (79) is sleeved on the surface of the push shaft (78).

9. A detection method using the product defect detection system based on vision inspection as described in any one of claims 1-8, characterized in that: Includes the following steps: The electronic product circuit board is placed on the toggle assembly (3) and transported by the conveying assembly (2). The circuit board is cleaned and the solder joints are toggled by the toggle assembly (3). When the circuit board is transported to the bottom of the shooting assembly (7), the conveying assembly (2) stops transporting the circuit board. The gas in the gas supply assembly (4) enters the switching assembly (5). The switching assembly (5) drives the shooting assembly (7) to swing and capture images of the circuit board for comparison and detection.

Images