Tank cover appearance defect inspection machine based on machine vision

Abstract

The utility model discloses a tank cover appearance defect inspection machine based on machine vision, which comprises a shell and an adjustable detection mechanism, the upper end of the interior of the shell is provided with a mounting plate, the middle of the interior of the mounting plate is slidably connected with sliding columns, the lower ends of the two sliding columns are fixedly connected with the upper end of a mounting block, and the upper end of the mounting block is fixedly connected with the upper end of the adjustable detection mechanism. The adjustable detection mechanism comprises a worm, worm gears, connecting rods, first gears and second gears, the worm is rotationally connected to the center in the mounting block, the worm gears are rotationally connected to the middles of the left side and the right side in the mounting block respectively, the worm is in meshed connection with the worm gears, the connecting rods are rotationally connected to the left end and the right end in the mounting block respectively, and the first gears are arranged on the front sides of the connecting rods; the tank cover appearance defect inspection machine based on machine vision is provided with the adjustable detection mechanism, the height and the deflection angle of the CCD camera can be rapidly and automatically adjusted, the detection range is enlarged, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of can lid appearance defect inspection technology, specifically a can lid appearance defect inspection machine based on machine vision. Background Technology

[0002] Metal can lids are a common type of container lid in the packaging industry, widely used in food, pharmaceuticals, and other sectors. During the production process, many defects may appear on the surface of metal can lids, such as dents and scratches. These defects can affect the sealing performance of the packaging, thus impacting product quality and safety. Therefore, timely and accurate detection of surface defects in metal can lids is of great importance. With the gradual maturation of machine vision technology, its application in the industrial field is becoming increasingly widespread. In existing metal can lid defect detection methods, a conveyor belt transports the metal can lid to a position below a CCD camera. The CCD camera obtains an image of the continuously cast slab surface, and image feature vectors are extracted through image processing. A classifier is then used to detect and classify surface defects. Traditional metal can lid defect detection only uses a CCD camera directly above the can lid to capture and analyze images. The fixed position and angle of the CCD camera, coupled with its inability to effectively capture the edges of the can lid, easily leads to missed detections. Therefore, we propose a machine vision-based can lid appearance defect inspection machine. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a machine vision-based can lid appearance defect inspection machine. It is equipped with an adjustable detection mechanism that can quickly and automatically adjust the height and deflection angle of the CCD camera, thereby increasing the detection range and improving the detection efficiency, and can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a machine vision-based can lid appearance defect inspection machine, including a housing and an adjustable detection mechanism;

[0005] Housing: The upper part of the housing is provided with a mounting plate, and the middle of the mounting plate is slidably connected with a sliding column. The lower end of each sliding column is fixedly connected to the upper end of a mounting block.

[0006] Adjustable detection mechanism: It includes a worm, a worm wheel, a connecting rod, gear one, and gear two. The worm is rotatably connected to the center of the mounting block, and the worm wheels are rotatably connected to the center of the left and right sides of the mounting block. The worm meshes with the worm wheels. The connecting rods are rotatably connected to the left and right ends of the mounting block. Gear one is located on the front side of the connecting rod, and gear two is located on the front side of the worm wheel. Gear one and gear two on the same side mesh with each other, providing a basis for angle adjustment. With an adjustable detection mechanism, the height and deflection angle of the CCD camera can be quickly and automatically adjusted, increasing the detection range and improving detection efficiency.

[0007] Furthermore, the adjustable detection mechanism also includes a detection component, which includes a main vision camera and an auxiliary vision camera. The main vision camera is located at the bottom center of the mounting block, and the auxiliary vision cameras are both located at the lower end of the connecting rod. Both the main vision camera and the auxiliary vision camera are bidirectionally electrically connected to the microcontroller, which can quickly detect defects on the surface of the can lid.

[0008] Furthermore, the adjustable detection mechanism also includes a motor, which is located on the upper left side of the mounting block. The input end of the motor is electrically connected to the output end of the microcontroller, and the lower end of the motor's output shaft is fixedly connected to the upper end of the worm gear, providing stable drive for adjusting the angle of the vision camera.

[0009] Furthermore, the adjustable detection mechanism also includes an electric push rod, which is located on the bottom right side of the mounting plate. The input end of the electric push rod is electrically connected to the output end of the microcontroller, and the lower end of the telescopic end of the electric push rod is fixedly connected to the upper left side of the mounting block, providing a stable drive for adjusting the height of the vision camera.

[0010] Furthermore, the adjustable detection mechanism also includes a counting component, which includes a slider, an infrared sensor, a lead screw, and a knob. The slider is slidably connected to the right end of the rear side wall of the housing. The infrared sensor is located at the front end of the slider and is bidirectionally electrically connected to the microcontroller. The lead screw is rotatably connected to the right end of the rear side wall of the housing. The outer surface of the lead screw is threadedly connected to the inner center of the infrared sensor. The knob is located at the upper end of the lead screw and can quickly adjust the height of the infrared sensor to achieve counting of can lids of different sizes.

[0011] Furthermore, it also includes bolt holes, which are evenly distributed at the lower end of the housing to facilitate the fixing of the machine body.

[0012] Furthermore, it also includes a microcontroller, which is located at the front center of the housing. The input terminal of the microcontroller is electrically connected to an external power supply to provide control for the detection of defects in the can lid's appearance.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This machine vision-based can lid appearance defect inspection machine has the following advantages:

[0014] 1. The microcontroller controls the motor to run. The motor's output shaft drives the worm gear to rotate. Through the meshing of the worm gear with the worm wheel and the meshing of gear one with gear two, the connecting rod is driven to deflect, thereby deflecting the angles of the two auxiliary vision cameras. This increases the detection field of view and improves the detection accuracy.

[0015] 2. The microcontroller controls the operation of the electric push rod. The extension and retraction of the electric push rod drives the mounting block to move up and down, thereby adjusting the height of the three vision cameras. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of this utility model.

[0019] In the diagram: 1. Housing, 2. Mounting plate, 3. Sliding column, 4. Mounting block, 5. Adjustable detection mechanism, 51. Worm gear, 52. Worm wheel, 53. Connecting rod, 54. Gear 1, 55. Gear 2, 56. Detection component, 561. Main vision camera, 562. Auxiliary vision camera, 57. Motor, 58. Electric push rod, 59. Counting component, 591. Slider, 592. Infrared sensor, 593. Lead screw, 594. Knob, 6. Bolt hole, 7. Microcontroller. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-3 This embodiment provides a technical solution: a machine vision-based can lid appearance defect inspection machine, including a housing 1 and an adjustable detection mechanism 5;

[0022] Housing 1: The upper part of the housing 1 is provided with a mounting plate 2. The middle of the mounting plate 2 is slidably connected with a sliding column 3. The lower end of each sliding column 3 is fixedly connected to the upper end of a mounting block 4. It also includes bolt holes 6, which are evenly distributed at the lower end of the housing 1 to facilitate the fixation of the body. It also includes a microcontroller 7, which is located in the middle of the front end of the housing 1. The input end of the microcontroller 7 is electrically connected to an external power supply to provide control for the detection of defects in the can lid.

[0023] Adjustable detection mechanism 5 includes a worm 51, a worm wheel 52, a connecting rod 53, a first gear 54, and a second gear 55. The worm 51 is rotatably connected to the center of the mounting block 4. The worm wheel 52 is rotatably connected to the center of the left and right sides of the mounting block 4, respectively. The worm 51 is meshed with the worm wheel 52. The connecting rod 53 is rotatably connected to the left and right ends of the mounting block 4, respectively. The first gear 54 is located in front of the connecting rod 53, and the second gear 55 is located in front of the worm wheel 52. The first gear 54 and the second gear 55 on the same side are meshed, providing a basis for angle adjustment. 5 also includes a detection component 56, which includes a main vision camera 561 and an auxiliary vision camera 562. The main vision camera 561 is located at the bottom center of the mounting block 4, and the auxiliary vision camera 562 is located at the lower end of the connecting rod 53. Both the main vision camera 561 and the auxiliary vision camera 562 are bidirectionally electrically connected to the microcontroller 7, enabling rapid detection of defects on the can lid surface. The adjustable detection mechanism 5 also includes a motor 57, which is located on the upper left side of the mounting block 4. The input end of the motor 57 is electrically connected to the output end of the microcontroller 7, and the lower end of the output shaft of the motor 57 is connected to the upper end of the worm gear 51. The adjustable detection mechanism 5 also includes an electric push rod 58, which is located on the bottom right side of the mounting plate 2. The input end of the electric push rod 58 is electrically connected to the output end of the microcontroller 7, and the lower end of the telescopic end of the electric push rod 58 is fixedly connected to the upper left side of the mounting block 4 to provide a stable drive for adjusting the height of the visual camera. The adjustable detection mechanism 5 also includes a counting component 59, which includes a slider 591, an infrared sensor 592, a lead screw 593, and a knob 594. The slider 591 is slidably connected to the rear of the housing 1. On the right side wall, an infrared sensor 592 is located at the front end of the slider 591. The infrared sensor 592 is bidirectionally electrically connected to the microcontroller 7. A lead screw 593 is rotatably connected to the right side wall of the housing 1. The outer surface of the lead screw 593 is threadedly connected to the inner center of the infrared sensor 592. A knob 594 is located at the upper end of the lead screw 593, which can quickly adjust the height of the infrared sensor 592 to achieve counting of can lids of different specifications. An adjustable detection mechanism is provided, which can quickly and automatically adjust the height and deflection angle of the CCD camera, increasing the detection range and improving detection efficiency.

[0024] The working principle of the machine vision-based can lid appearance defect inspection machine provided by this utility model is as follows: When inspecting can lid appearance defects, the housing 1 is fixed above the can lid conveyor belt through bolt holes 6. First, the height of the infrared sensor 592 is adjusted according to the can lid specifications. When the knob 594 is turned clockwise, the lead screw 593 drives the slider 591 to move downward, and the infrared sensor 592 also moves downward synchronously. When the knob 594 is turned counterclockwise, the lead screw 593 drives the slider 591 to move upward, and the infrared sensor 592 also moves upward synchronously, until the infrared sensor 592 is adjusted to a suitable height. Then, the detection device is adjusted. The microcontroller 7 controls the electric push rod 58 to work. The telescopic end of the electric push rod 58 extends downward, driving the mounting block 4 to move downward. The sliding column 3 provides guidance for the movement of the mounting block 4 until the mounting block 4 moves to a suitable position. The microcontroller 7 controls the motor 57 to run. The output shaft of the motor 57 drives the worm gear 51 to rotate. Because the worm gear 51 is meshed with the worm wheel 52, the worm wheel 52 also rotates accordingly. Because gear 54 and gear 55 on the same side are meshed, gear 54 rotates accordingly, causing connecting rod 53 to deflect synchronously, thus deflecting the angles of the two auxiliary vision cameras 562. This increases the detection field of view and improves the detection accuracy. After the adjustment is completed, the conveyor belt continuously transports the can lid. The microcontroller 7 controls the infrared sensor 592 to work. When the can lid passes in front of the infrared sensor 592, the infrared sensor 592 detects the can lid and sends an electrical signal to the microcontroller 7 to perform a counting function. When the can lid passes under the three vision cameras, the main vision camera 561 detects the top of the can lid, and the two auxiliary vision cameras 562, after angle adjustment, detect the edge of the can lid, achieving all-round detection of the can lid. The three vision cameras transmit the captured images to the microcontroller 7. The microcontroller 7 performs defect detection through comparative analysis. It is equipped with an adjustable detection mechanism that can quickly and automatically adjust the height and deflection angle of the CCD camera, increasing the detection range and improving detection efficiency.

[0025] It is worth noting that the microcontroller 7 disclosed in the above embodiments is an S7-200 microcontroller, the main vision camera 561 is a MARS1300S-200UM vision camera, the auxiliary vision camera 562 is an MV-CE003-20GM vision camera, the motor 57 is a TG-05D-AMD-30-KA motor, the electric actuator 58 is a DDT-55 electric actuator, and the infrared sensor 592 is a KP200A infrared sensor. The microcontroller 7 controls the operation of the main vision camera 561, the auxiliary vision camera 562, the motor 57, the electric actuator 58, and the infrared sensor 592 using methods commonly used in the prior art.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A machine vision based can end appearance defect inspection machine characterized by: It include shell (1) and adjustable detection mechanism (5); Shell (1): its inside upper end is equipped with mounting plate (2), the inside middle of mounting plate (2) is slidably connected with slide column (3), the lower end of two slide columns (3) is fixedly connected with the upper end of one mounting block (4); Adjustable detection mechanism (5): it includes worm (51), worm wheel (52), connecting rod (53), gear one (54) and gear two (55), worm (51) is rotatably connected to the inside center of mounting block (4), worm wheel (52) is rotatably connected to the inside middle of left and right sides of mounting block (4), worm (51) is rotatably connected with worm wheel (52), connecting rod (53) is rotatably connected to the inside left and right ends of mounting block (4), gear one (54) is arranged on the front side of connecting rod (53), gear two (55) is arranged on the front side of worm wheel (52), gear one (54) and gear two (55) on the same side are rotatably connected.

2. The machine vision-based can lid appearance defect inspection machine according to claim 1, characterized in that: It also includes single-chip microcomputer (7), which is arranged on the front end of the shell (1), and the input end of the single-chip microcomputer (7) is electrically connected with the external power supply.

3. A machine vision-based can lid appearance defect inspection machine according to claim 2, characterized in that: The adjustable detection mechanism (5) further includes a detection assembly (56), which includes a main vision camera (561) and an auxiliary vision camera (562), the main vision camera (561) is arranged on the bottom end of the mounting block (4), the auxiliary vision camera (562) is arranged on the lower end of the connecting rod (53), and the main vision camera (561) and the auxiliary vision camera (562) are bidirectionally connected with the single-chip microcomputer (7).

4. A machine vision-based can lid appearance defect inspection machine according to claim 3, characterized in that: The adjustable detection mechanism (5) further includes a motor (57), which is arranged on the upper end of the left side of the mounting block (4), the input end of the motor (57) is electrically connected with the output end of the single-chip microcomputer (7), and the output shaft lower end of the motor (57) is fixedly connected with the upper end of the worm (51).

5. A machine vision based can lid appearance defect inspection machine as claimed in claim 4 wherein: The adjustable detection mechanism (5) further includes an electric push rod (58), which is arranged on the bottom end of the right side of the mounting plate (2), the input end of the electric push rod (58) is electrically connected with the output end of the single-chip microcomputer (7), and the telescopic end lower end of the electric push rod (58) is fixedly connected with the upper end of the left side of the mounting block (4).

6. A machine vision-based can lid appearance defect inspection machine according to claim 5, characterized in that: The adjustable detection mechanism (5) further includes a counting assembly (59), which includes a sliding block (591), an infrared sensor (592), a lead screw (593) and a knob (594), the sliding block (591) is slidably connected to the right end of the rear wall of the shell (1), the infrared sensor (592) is arranged on the front end of the sliding block (591), the infrared sensor (592) is bidirectionally connected with the single-chip microcomputer (7), the lead screw (593) is rotatably connected to the right end of the rear wall of the shell (1), the outer surface of the lead screw (593) is threadedly connected with the inside middle of the infrared sensor (592), and the knob (594) is arranged on the upper end of the lead screw (593).

7. The machine vision-based can lid appearance defect inspection machine according to claim 1, wherein: It also includes bolt holes (6), which are evenly arranged on the lower end of the shell (1).

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