A machine vision inspection system and method

Abstract

The application provides a kind of machine vision detection system and method, it is related to machine vision detection technical field.The conveying frame is internally provided with recessed groove shape, the both ends of recessed groove shape are rotatably matched with conveying roller, the outside of conveying roller is sleeved with conveying belt, the both ends of conveying frame are fixedly connected with inclined plate frame, the detection platform is fixedly connected between inclined plate frame, the bottom of detection platform is fixedly connected with connecting frame, the third motor is fixedly connected between connecting frame, the driving end of third motor is fixedly connected with rotary table, and rotary table and detection platform are rotatably matched.Through the third line camera, the top position of the object is identified downward, the integrity and damage are identified, and the third motor is driven to drive the rotation of the rotary table, the rotation of the object is completed after rotation, and the four sides of the object can be identified with the first line camera on the side.

Description

Technical Field

[0001] This invention relates to the field of machine vision inspection technology, specifically to a machine vision inspection system and method. Background Technology

[0002] Currently, there is an increasing demand for product quality records and traceability in industrial production. Machine vision inspection has become one of the key technologies in the production process. Machine vision inspection devices include conveyor belts and line scan cameras. When inspecting surface scratches and other defects of the object being tested, the object is transported to the inspection end of the line scan camera via the conveyor belt. The line scan camera inspects the object and judges whether the quality of the product meets the production requirements based on the inspection results.

[0003] Machine vision inspection in the current technology refers to the technology of using machine vision products to convert the target to be inspected into image signals, extracting and recognizing features through a dedicated image processing system, and then controlling the actions of on-site equipment. Machine vision inspection achieves automatic detection and analysis of target objects by simulating human vision; however, it requires moving the position of the aligning camera or the object itself to detect different surfaces of the object, resulting in low detection efficiency and an inability to quickly complete automated detection of different surfaces of the object.

[0004] When applying for this invention, the applicant, after searching, discovered a Chinese patent that discloses a "Machine Vision Inspection System and Method," application number "202211196851.9." This patent mainly addresses the problem that conveyor belts used for transporting objects in factories are generally long, and vibrations can occur during transport, causing the objects to shake during inspection and reducing the inspection effect of line scan cameras. However, different surfaces of the object may show different levels of damage during inspection, thus requiring machine vision to complete the inspection work. Therefore, based on the applicant's invention, a method has been invented that can perform machine vision inspection, solving the problems of low inspection efficiency and the inability to quickly and automatically complete the inspection of different surfaces of the object. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a machine vision inspection system and method that solves the problems of low inspection efficiency and the inability to quickly and automatically complete the inspection of different surfaces of an object.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a machine vision inspection system and method, comprising: a conveyor frame, an inspection platform, and a rear fixing plate. The conveyor frame has a groove inside, and conveyor rollers are rotatably fitted at both ends of the groove. A conveyor belt is sleeved on the outside of the conveyor rollers. Inclined frame frames are fixedly connected to both ends of the conveyor frame. An inspection platform is fixedly connected between the inclined frame frames. A connecting frame is fixedly connected to the bottom end of the inspection platform. A third motor is fixedly connected between the connecting frames. A turntable is fixedly connected to the drive end of the third motor. The turntable and the inspection platform are rotatably fitted.

[0009] A rear fixing plate is fixedly connected to the middle of the rear side of the conveyor frame. An extension frame is fixedly connected to each of the four corners of the top of the rear fixing plate. An electric telescopic rod is slidably fitted inside the extension frame. A slider is fixedly connected to the outer side of the bottom end of the electric telescopic rod. The slider and one side of the extension frame are slidably fitted. A push plate is fixedly connected to the extension end of the electric telescopic rod.

[0010] One side of the inclined plate frame is rotatably connected to a bidirectional screw, and the other side of the inclined plate frame is fixedly connected to a slide rod. Both ends of the bidirectional screw are threaded with threaded blocks. The top of the threaded blocks is fixedly connected to a feeding inclined plate, and the top of the feeding inclined plate is fixedly connected to a mounting bracket.

[0011] Preferably, the mounting frame has pulleys rotatably connected to both ends inside, a rotating belt is sleeved on the outside of the pulleys, a plurality of connecting push plates are fixedly connected to the outside of the rotating belt, and a second motor is fixedly connected to one end of the top of the mounting frame, with the drive end of the second motor fixedly connected to the pulley.

[0012] Preferably, the feeding ramp is L-shaped, the two ends of the slide rod are slidably engaged with the feeding ramp, and one end of the bidirectional screw is fixedly connected to a crank handle.

[0013] Preferably, a fixing frame is fixedly connected to one side of the bottom of the detection platform, and a second array camera is fixedly connected to one end of the fixing frame.

[0014] Preferably, a third line camera is fixedly connected to the top center of the rear fixing plate, and a first line camera is fixedly connected to the inner center of the rear fixing plate.

[0015] Preferably, a first motor is fixedly connected to the end of the extension frame on one side, and a threaded rod is fixedly connected to the drive end of the first motor. The threaded rod and the extension frame are rotatably engaged. A moving block is threadedly connected to one end of the threaded rod, and a small telescopic rod is fixedly connected to the bottom end of the moving block. The extension end of the small telescopic rod is fixedly connected to the push plate.

[0016] Preferably, a roller is rotatably fitted to the inner side of one side of the inclined plate frame.

[0017] A machine vision inspection method includes the following inspection steps:

[0018] Step S1: First, the object is conveyed by the conveyor belt. When it moves to the inside of the feeding ramp during the conveying process, it can be driven by the second motor. After the motor drives the pulley to rotate, the belt can be fixed with the connecting push plate by rotating the outer side of the pulley, thus completing the rotation action. The object on the inside of the feeding ramp is pushed by the connecting push plate, thus completing the feeding action. Since the feeding ramp is L-shaped, both ends of the object will be on the upper surface of the feeding ramp. By pushing, the object is moved to the top of the detection platform.

[0019] Step S2: When the object is fed through the feeding ramp, it is first supported by the bottom fixed frame for the second line camera. The second line camera performs machine vision inspection on the bottom of the object, which can identify whether the bottom of the object is intact or damaged.

[0020] Step S3: By rotating the crank handle, the bidirectional screw will rotate and engage with the threaded block. This allows the threaded block to move closer to or further away from the center. The bottom of the feeding ramp supports objects of different widths, thus adjusting the feeding process.

[0021] Step S4: The object is above the detection platform. The third-line camera on the top of the rear fixed plate identifies the top position of the object and identifies whether it is intact or damaged. At the same time, the third motor drives the turntable to rotate, which completes the rotation of the object. Together with the first-line camera on the side, it can identify whether the object is intact or damaged on all four sides.

[0022] Step S5: After recognition is completed, the first motor drives the rotation of the threaded rod. After rotation, it engages with the moving block through a thread, which moves the small telescopic rod. The bottom end of the small telescopic rod is connected to the push plate, which slides with the electric telescopic rod to complete the position movement. During the movement, the electric telescopic rod extends, cooperating with the descent of the small telescopic rod. Then, the push plate pushes the object, which moves it above the roller. By tilting the roller, the object can slide again above the conveyor belt to complete the normal conveying operation.

[0023] (III) Beneficial Effects

[0024] This invention provides a machine vision inspection system and method. It has the following beneficial effects:

[0025] 1. This invention comprises a third-line camera, a third motor, a turntable, and a first-line motor. The third-line camera identifies the top position of an object from below, distinguishing between intact and damaged parts. Simultaneously, the third motor drives the turntable to rotate, thus rotating the object. Together with the first-line camera on the side, this structure enables comprehensive visual inspection, reducing operational defects.

[0026] 2. The present invention is equipped with: a second motor, a rotating belt, a connecting push plate and a feeding ramp. Driven by the second motor, the belt pulley rotates. The outer side of the belt pulley rotates and is fixed to the connecting push plate, thereby completing the rotation. The object on the inner side of the feeding ramp is pushed by the connecting push plate, thereby completing the feeding function. This structure can change the flow of the object and facilitate visual inspection of the feeding process.

[0027] 3. This invention comprises a small telescopic rod, a connecting push plate, and an electric telescopic rod. The small telescopic rod moves, and its bottom end is connected to the push plate, which slides in cooperation with the electric telescopic rod to complete the positional movement. During the movement, the electric telescopic rod extends, cooperating with the descent of the small telescopic rod. Subsequently, the push plate pushes the object, moving it above the roller. By tilting the roller, the object can be slid back above the conveyor belt to complete the normal conveying operation. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0029] Figure 2 This is a front view schematic diagram of the present invention;

[0030] Figure 3 This is a bottom view schematic diagram of the detection platform of the present invention;

[0031] Figure 4 For the present invention Figure 1 Enlarged diagram of point A in the diagram;

[0032] Figure 5 For the present invention Figure 3 Enlarged diagram of point B in the diagram;

[0033] Figure 6 This is a rear view diagram of the present invention;

[0034] Figure 7 This is a schematic diagram of the machine vision inspection method of the present invention.

[0035] The components include: 1. Conveyor frame; 101. Conveyor belt; 103. First-line camera; 2. Detection platform; 201. Inclined plate frame; 202. Roller; 203. Turntable; 204. Fixing frame; 205. Second-line camera; 3. Rear fixing plate; 301. Third-line camera; 302. First motor; 3021. Threaded rod; 303. Extension frame; 4. Electric telescopic rod; 401. Small telescopic rod; 402. Push plate; 5. Slide rod; 6. Rotating belt; 601. Connecting push plate; 7. Mounting frame; 701. Second motor; 702. Feeding inclined plate; 8. Third motor; 801. Connecting frame; 9. Bidirectional screw; 901. Threaded block; 902. Handle. Detailed Implementation

[0036] 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.

[0037] Example:

[0038] like Figure 1-7 As shown, this embodiment of the invention provides a machine vision inspection system and method, including: a conveyor frame 1, an inspection platform 2, and a rear fixing plate 3. The conveyor frame 1 has a groove inside, which facilitates the driving of the conveyor belt 101 for conveying. Conveyor rollers are rotatably fitted at both ends of the groove, and the conveyor belt 101 is sleeved on the outside of the conveyor rollers. The conveyor belt 101 conveys objects. During the conveying process, when the conveyor frame moves to the inner side of the loading inclined plate 702, inclined plate frames 201 are fixedly connected to both ends of the conveyor frame 1. The inspection platform 2 is fixedly connected between the inclined plate frames 201. A connecting frame 801 is fixedly connected to the bottom end of the inspection platform 2. A third motor 8 is fixedly connected between the connecting frames 801. The third motor 8 drives the turntable 203. The rotation completes the rotation of the object, enabling it to identify the integrity and damage of the object on all four sides in conjunction with the first line camera 103 on the side. The drive end of the third motor 8 is fixedly connected to a turntable 203, which can rotate the object and perform machine vision inspection on different surfaces. The turntable 203 and the inspection platform 2 rotate in coordination. A fixing frame 204 is fixedly connected to one side of the bottom of the inspection platform 2, which supports the second line camera 205. One end of the fixing frame 204 is fixedly connected to the second line camera 205. The object is above the inspection platform 2, and the third line camera 301 on the top of the rear fixing plate 3 identifies the top position of the object from below, thus identifying its integrity and damage.

[0039] A rear fixing plate 3 is fixedly connected to the middle of the rear side of the conveyor frame 1. Extension frames 303 are fixedly connected to the four corners of the top of the rear fixing plate 3. An electric telescopic rod 4 is slidably fitted inside the extension frame 303. A push plate 402 is connected to the bottom end of a small telescopic rod 401, which slides with the electric telescopic rod 4 to complete the positional movement. A slider is fixedly connected to the outer side of the bottom end of the electric telescopic rod 4, and the slider slides with one side of the extension frame 303. The push plate 402 is fixedly connected to the extension end of the electric telescopic rod 4. The electric telescopic rod 4 extends, coordinating with the descent of the small telescopic rod 401, and then pushes the object through the push plate 402. A third-line camera 301 is fixedly connected to the middle of the top of the rear fixing plate 3. A first-line camera 103 is fixedly connected to the middle of the inner side of the rear fixing plate 3. A first motor 30 is fixedly connected to the end of one side of the extension frame 303. 2. The rotation of the threaded rod 3021 driven by the first motor 302 can move the position of the small telescopic rod 401, facilitating the pushing and dropping of objects through the push plate 402 structure and the reset function of the small telescopic rod 401. The first motor 302 drives the rotation of the threaded rod 3021, which then engages with the moving block through a threaded connection, thus moving the small telescopic rod 401. The drive end of the first motor 302 is fixedly connected to the threaded rod 3021, which rotatably engages with the extension frame 303. One end of the threaded rod 3021 is threadedly connected to the moving block, and the bottom end of the moving block is fixedly connected to the small telescopic rod 401. The structure of the small telescopic rod 401 and the electric telescopic rod 4 can lower the push plate 402 to prevent it from affecting the loading of objects. The extension end of the small telescopic rod 401 is fixedly connected to the push plate 402.

[0040] A bidirectional screw 9 is rotatably connected to one side of the bottom of one inclined plate frame 201, and a slide rod 5 is fixedly connected to the other side of the bottom of one inclined plate frame 201. Through the action of the slide rod 5, the stable position movement of the feeding inclined plate 702 can be maintained. A roller 202 is rotatably fitted to the inner side of one inclined plate frame 201. By pushing the object with the push plate 402, it can be moved to the top of the roller 202. Through the tilting setting of the roller 202, the object can be slid again to the top of the conveyor belt 101 to complete the normal conveying operation. Both ends of the bidirectional screw 9 are threaded with threaded blocks 901. A feeding ramp 702 is fixedly connected to the top of each threaded block 901. Objects inside the feeding ramp 702 are pushed by a connecting push plate 601, thus completing the feeding function. A mounting frame 7 is fixedly connected to the top of the feeding ramp 702, protecting the rotating belt 6 structure. Pulleys are rotatably connected to both ends of the mounting frame 7, and a rotating belt 6 is fitted around each pulley. The rotating belt 6 is fixed to the connecting push plate 601 on the outside of the pulley, thus completing the rotation. Several connecting push plates 601 are fixedly connected to the outside of the rotating belt 6, pushing objects upwards to complete the conveying and feeding. A second motor 701 is fixedly connected to one end of the mounting frame 7. Driven by the second motor 701, the pulley rotates. The rotating belt 6 is fixed to the connecting push plate 601 on the outside of the pulley, thus completing the rotation. The drive end of the second motor 701 and the pulley are fixedly connected... The loading ramp 702 is L-shaped. Due to the L-shaped setting of the loading ramp 702, both ends of the object will be on the upper surface of the loading ramp 702. By pushing, the object is moved above the detection platform 2. The two ends of the slide rod 5 are slidably engaged with the loading ramp 702. One end of the bidirectional screw 9 is fixedly connected to the crank 902. By rotating the crank 902, the bidirectional screw 9 will rotate and engage with the threaded block 901. This allows the threaded block 901 to move closer to or further away from the center.

[0041] A machine vision inspection method includes the following inspection steps:

[0042] Step S1: First, the object is conveyed by the conveyor belt 101. When it moves to the inside of the loading ramp 702 during the conveying process, it can be driven by the second motor 701. After driving, the pulley will rotate. The belt 6 can be fixed with the connecting push plate 601 by rotating the outer side of the pulley, thereby completing the rotation action. The object inside the loading ramp 702 is pushed by the connecting push plate 601, thereby completing the loading action. Since the loading ramp 702 is L-shaped, both ends of the object will be on the upper surface of the loading ramp 702. By pushing, the object is moved to the top of the detection platform 2.

[0043] Step S2: During the feeding process of the object through the feeding ramp 702, the second line camera 205 is first supported by the bottom fixing frame 204. The second line camera 205 performs machine vision inspection on the bottom of the object, which can identify whether the bottom of the object is intact or damaged.

[0044] Step S3: By rotating the crank handle 902, the bidirectional screw 9 rotates and engages with the threaded block 901. This allows the threaded block 901 to move closer to or further away from the center. The bottom of the feeding ramp 702 supports objects of different widths, thus adjusting the feeding process.

[0045] Step S4: The object is above the detection platform 2. The third line camera 301 on the top of the rear fixed plate 3 identifies the top position of the object and identifies whether it is intact or damaged. At the same time, the third motor 8 drives the turntable 203 to rotate. After rotation, the object is rotated. Together with the first line camera 103 on the side, the object's integrity and damage on all four sides can be identified.

[0046] Step S5: After identification, the first motor 302 drives the rotation of the threaded rod 3021. After rotation, it engages with the moving block through a thread, thus moving the small telescopic rod 401. The bottom end of the small telescopic rod 401 is connected to the push plate 402, which slides with the electric telescopic rod 4 to complete the position movement. During the movement, the electric telescopic rod 4 extends, cooperating with the descent of the small telescopic rod 401. Then, the push plate 402 pushes the object, moving it above the roller 202. Through the tilting setting of the roller 202, the object can slide again above the conveyor belt 101 to complete the normal conveying operation.

[0047] 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 machine vision inspection system, comprising: The conveyor frame (1), the detection platform (2), and the rear fixing plate (3) are characterized in that: the conveyor frame (1) has a groove inside, the two ends of the groove are rotatably fitted with conveyor rollers, the conveyor rollers are fitted with a conveyor belt (101), the two ends of the conveyor frame (1) are fixedly connected with inclined plate frames (201), the inclined plate frames (201) are fixedly connected to each other, the detection platform (2) is fixedly connected to the bottom of the detection platform (2), the third motor (8) is fixedly connected to the connecting frames (801), the drive end of the third motor (8) is fixedly connected to a turntable (203), and the turntable (203) and the detection platform (2) are rotatably fitted. A rear fixing plate (3) is fixedly connected to the middle of the rear side of the conveyor frame (1). An extension frame (303) is fixedly connected to each of the four corners of the top of the rear fixing plate (3). An electric telescopic rod (4) is slidably fitted inside the extension frame (303). A slider is fixedly connected to the outer side of the bottom end of the electric telescopic rod (4). The slider and one side of the extension frame (303) are slidably fitted. A push plate (402) is fixedly connected to the extension end of the electric telescopic rod (4). A bidirectional screw (9) is rotatably connected to one side of the bottom end of the inclined plate frame (201) on one side, and a slide rod (5) is fixedly connected to the other side of the bottom end of the inclined plate frame (201) on one side. Both ends of the bidirectional screw (9) are threadedly connected to threaded blocks (901). A feeding inclined plate (702) is fixedly connected to the top of the threaded block (901). A mounting bracket (7) is fixedly connected to the top of the feeding inclined plate (702). A fixing bracket (204) is fixedly connected to one side of the bottom end of the detection platform (2). A second array camera (205) is fixedly connected to one end of the fixing bracket (204). A third array camera (301) is fixedly connected to the middle of the top of the rear fixing plate (3). A first array camera (103) is fixedly connected to the middle of the inner side of the rear fixing plate (3).

2. The machine vision inspection system according to claim 1, characterized in that: The mounting bracket (7) has pulleys rotatably connected to both ends inside. A rotating belt (6) is sleeved on the outside of the pulleys. Several connecting push plates (601) are fixedly connected to the outside of the rotating belt (6). A second motor (701) is fixedly connected to one end of the top of the mounting bracket (7). The drive end of the second motor (701) is fixedly connected to the pulley.

3. The machine vision inspection system according to claim 1, characterized in that: The feeding sloping plate (702) is L-shaped, and the two ends of the slide rod (5) are slidably engaged with the feeding sloping plate (702). One end of the bidirectional screw (9) is fixedly connected to a crank handle (902).

4. The machine vision inspection system according to claim 1, characterized in that: A first motor (302) is fixedly connected to the end of the extension frame (303) on one side. A threaded rod (3021) is fixedly connected to the drive end of the first motor (302). The threaded rod (3021) and the extension frame (303) are rotatably connected. A moving block is threadedly connected to one end of the threaded rod (3021). A small telescopic rod (401) is fixedly connected to the bottom end of the moving block. The extension end of the small telescopic rod (401) is fixedly connected to the push plate (402).

5. The machine vision inspection system according to claim 1, characterized in that: A roller (202) is rotatably fitted on the inner side of the inclined plate frame (201) on one side.

6. A machine vision inspection method, based on the machine vision inspection system according to any one of claims 1-5, characterized in that: The following testing steps are included: Step S1: Driven by the second motor (701), the belt (6) rotates to move the connecting push plate (601) to complete the feeding function; Step S2: During the feeding process of the object through the feeding ramp 702, the second line camera 205 is first supported by the bottom fixing frame 204. The second line camera 205 performs machine vision inspection on the bottom of the object, which can identify whether the bottom of the object is intact or damaged. Step S3: The third line camera (301) identifies the top position of the object downwards, and the first line camera (103) completes the identification of the integrity and damage of the four sides of the object; Step S4: The electric telescopic rod (4) and the small telescopic rod (401) descend, and the object is pushed by the push plate (402) to complete the normal conveying work.

Images