A blemish detection device based on 2D and 3D cameras

Abstract

The utility model discloses a kind of flaw detection equipment based on 2D camera and 3D camera, it is related to flaw detection technical field, the flaw detection equipment includes detection table and the detection machine shell being arranged on the detection table, further include 2D camera adjusting assembly, laser profilometer 3D camera, 3D camera adjusting assembly and mobile platform component.The utility model is first by industrial area 2D camera and carries out global rapid detection, only when identifying that there is scratch, laser profilometer 3D camera is started to the specific area detection, avoids the invalid shooting of 3D camera to no flaw area, greatly shortens detection time, reduces resource consumption;The 2D camera of the equipment can quickly obtain the plane position and profile information of the multiple side scratches of workpiece, and the 3D camera can accurately measure the depth of the scratched area, which ensures comprehensive investigation of the scratches on the workpiece surface and accurate detection of the scratch depth, improving the integrity and accuracy of the detection.

Description

Technical Field

[0001] This utility model relates to the field of defect detection technology, specifically a defect detection device based on 2D and 3D cameras. Background Technology

[0002] In the industrial manufacturing field, the surface quality of workpieces is one of the key indicators for measuring product performance and reliability. Scratches and other defects on the surface of workpieces will directly affect the quality, so it is necessary to conduct strict inspections on the surface of workpieces.

[0003] In existing technologies, some inspection devices only use 2D cameras for shooting, which can only detect the planar position of scratches and cannot obtain the scratch depth; other devices use 3D cameras for full-area inspection, which can obtain scratch depth information, but full-area 3D shooting is time-consuming, has low inspection efficiency, and shooting flawless areas is an ineffective task, resulting in a waste of resources. Utility Model Content

[0004] This invention provides a defect detection device based on 2D and 3D cameras, which has the advantages of quickly locating defect areas and high detection efficiency, thus solving the problems of existing detection devices being unable to obtain scratch depth and having low efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a defect detection device based on a 2D camera and a 3D camera, comprising a detection table and a detection housing mounted on the detection table, and further comprising a 2D camera adjustment assembly, a laser profilometer 3D camera, a 3D camera adjustment assembly, and a moving platform assembly, wherein: The testing table is equipped with a display and control device. A controller is located on one side of the testing machine housing. The display and control device is electrically connected to the controller. The testing machine housing has a groove. Sliding shafts are symmetrically welded inside the groove. A rectangular through hole is located directly above the sliding shafts. Two sets of support rods are symmetrically fixed to both sides of the testing machine housing by bolts. As a preferred embodiment of this utility model, the 2D camera adjustment assembly includes an industrial area array camera. The industrial area array camera has rotating shafts welded to both ends. A secondary gear is welded to one end of the rotating shaft. The secondary gear meshes with a main gear and rotates in cooperation with it. The main gear is connected to one end of an adjustment motor. The adjustment motor is fixed to a support rod by screws. The two ends of the rotating shaft are fitted with the support rod and rotate in cooperation with it. The industrial area array camera is electrically connected to a display control device.

[0006] The regulating motor drives the secondary gear to rotate through the main gear, which in turn drives the industrial area scan camera on the rotating shaft to adjust the shooting angle.

[0007] As a preferred technical solution of this utility model, the laser profilometer 3D camera includes a laser emitting hole, which is rectangular in structure and located on the bottom surface of the laser profilometer 3D camera. A receiving lens is provided on one side of the laser emitting hole and is inclinedly arranged on the bottom surface of the laser profilometer 3D camera. The laser profilometer 3D camera is electrically connected to a display control device.

[0008] The laser profilometer 3D camera emits a laser beam from its internal light source through a laser emission hole and projects it onto the surface of the workpiece. It uses a receiving lens to capture the laser signals reflected or scattered by the workpiece. These laser signals are transmitted back to the display and control equipment, which uses principles such as triangulation to calculate the three-dimensional contour data of the object's surface and analyze the height difference between the scratched area and the surrounding normal surface, thereby accurately measuring the depth information of the scratch.

[0009] As a preferred embodiment of this utility model, the 3D camera adjustment assembly includes a vertical rod, a top frame, a hanging plate, a rotating motor, and a side rod. The two ends of the vertical rod are fixed to one side of the support rod by bolts.

[0010] As a preferred technical solution of this utility model, a vertical rod is welded to one side of the top frame, and the top frame is fitted into both sides of the laser profilometer 3D camera and rotates in cooperation. One end of the side rod is fixed to the laser profilometer 3D camera by screws, and the other end is fixedly connected to a rotating motor. The rotating motor is fixed to the hanging plate by screws and its axis coincides with the rotation axis of the laser profilometer 3D camera.

[0011] The rotating motor on the hanging plate can drive the side rod to rotate, and the side rod drives the laser profilometer 3D camera to rotate around the lower end of the top frame, so that the laser emission hole can be adjusted to adjust the laser emission angle, which is convenient for projecting and inspecting various sides of the workpiece.

[0012] As a preferred embodiment of the present invention, the mobile platform component includes a placement platform, the placement platform is provided with a workpiece to be inspected, and a plurality of sliding rods are welded to the bottom end of the placement platform, the sliding rods being fitted into rectangular through holes.

[0013] As a preferred embodiment of this utility model, the bottom end of the slide rod is fitted with a sliding shaft and slidably engaged. A movable plate is welded to the lower end of the slide rod. The movable plate is penetrated by a screw and rotates spirally. The screw is connected to one end of a servo motor, and the servo motor is electrically connected to a controller.

[0014] Compared with existing technologies, this invention provides a defect detection device based on 2D and 3D cameras, which has the following advantages: This invention first uses an industrial area array 2D camera for rapid full-area detection, and only activates the laser profilometer 3D camera to detect specific areas when scratches are detected, avoiding invalid shooting of flawless areas by the 3D camera, greatly shortening the detection time and reducing resource consumption; the 2D camera of this device can quickly acquire the planar position and contour information of scratches on multiple sides of the workpiece, and the 3D camera can accurately measure the depth of scratched areas, which not only ensures a comprehensive inspection of scratches on the workpiece surface, but also achieves accurate detection of scratch depth, improving the completeness and accuracy of the detection. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a structural diagram of the internal structure of the testing machine housing of this utility model; Figure 3 This is a schematic diagram of the 2D camera adjustment component structure of this utility model; Figure 4 This is a structural diagram of the 3D camera of the laser profilometer of this utility model; Figure 5 This is a schematic diagram of the 3D camera adjustment component structure of this utility model; Figure 6 This is a structural diagram of the mobile platform component of this utility model.

[0016] In the diagram: 1. Inspection table; 2. Inspection housing; 3. 2D camera adjustment assembly; 4. Laser profilometer 3D camera; 5. 3D camera adjustment assembly; 6. Moving platform assembly; 7. Display control equipment; 8. Controller; 31. Industrial area array camera; 32. Rotating shaft; 33. Secondary gear; 34. Main gear; 35. Adjustment motor; 41. Laser emitting aperture; 42. Receiving lens; 21. Groove; 22. Sliding shaft; 23. Rectangular perforation; 24. Support rod; 51. Vertical rod; 52. Top frame; 53. Hanging plate; 54. Rotating motor; 55. Side rod; 61. Placement table; 62. Sliding rod; 63. Moving plate; 64. Screw; 65. Servo motor; 9. Inspection workpiece. Detailed Implementation

[0017] 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. Example 1

[0018] Please see Figures 1-6 This utility model discloses a defect detection device based on a 2D camera and a 3D camera, including a detection table 1 and a detection housing 2 disposed on the detection table 1, and also including a 2D camera adjustment component 3, a laser profilometer 3D camera 4, a 3D camera adjustment component 5, and a moving platform component 6, wherein: Please refer to the appendix. Figure 2 The testing table 1 is equipped with a display and control device 7. The testing housing 2 is equipped with a controller 8 on one side. The display and control device 7 is electrically connected to the controller 8. The testing housing 2 is equipped with a groove 21. A sliding shaft 22 is symmetrically welded inside the groove 21. A rectangular through hole 23 is provided directly above the sliding shaft 22. Two sets of support rods 24 are symmetrically fixed on both sides of the testing housing 2 by bolts. Please refer to the appendix. Figure 3 The 2D camera adjustment assembly 3 includes an industrial area array camera 31. The industrial area array camera 31 has a rotating shaft 32 welded to both ends. A secondary gear 33 is welded to one end of the rotating shaft 32. The secondary gear 33 meshes with a main gear 34 and rotates in cooperation with it. The main gear 34 is connected to one end of an adjustment motor 35. The adjustment motor 35 is fixed to a support rod 24 by screws. The two ends of the rotating shaft 32 are fitted into the support rod 24 and rotate in cooperation with it. The industrial area array camera 31 is electrically connected to a display control device 7.

[0019] The adjusting motor 35 drives the secondary gear 33 to rotate through the main gear 34, which in turn drives the industrial area array camera 31 on the rotating shaft 32 to adjust the shooting angle.

[0020] Please refer to the appendix. Figure 4 The laser profilometer 3D camera 4 includes a laser emission aperture 41, which is rectangular and located on the bottom surface of the laser profilometer 3D camera 4. A receiving lens 42 is provided on one side of the laser emission aperture 41 and is inclinedly located on the bottom surface of the laser profilometer 3D camera 4. The laser profilometer 3D camera 4 is electrically connected to the display control device 7.

[0021] The laser profilometer 3D camera 4 emits a laser beam from the laser emission hole 41 onto the surface of the workpiece 9 and uses the receiving lens 42 to capture the laser signals reflected or scattered by the workpiece. These laser signals are transmitted back to the display and control device 7, which calculates the three-dimensional contour data of the object surface by combining the principles of triangulation and other methods, and analyzes the height difference between the scratched area and the surrounding normal surface, thereby accurately measuring the depth information of the scratch.

[0022] Please refer to the appendix. Figure 5 The 3D camera adjustment assembly 5 includes a vertical rod 51, a top frame 52, a hanging plate 53, a rotating motor 54, and a side rod 55. The two ends of the vertical rod 51 are fixed to one side of the support rod 24 by bolts.

[0023] A vertical rod 51 is welded to one side of the top frame 52. The top frame 52 is fitted into both sides of the laser profilometer 3D camera 4 and rotates in cooperation. One end of the side rod 55 is fixed to the laser profilometer 3D camera 4 with screws, and the other end is fixedly connected to the rotating motor 54. The rotating motor 54 is fixed to the hanging plate 53 with screws and its axis coincides with the rotation axis of the laser profilometer 3D camera 4.

[0024] The rotating motor 54 on the hanging plate 53 can drive the side rod 55 to rotate, and the side rod 55 drives the laser profilometer 3D camera 4 to rotate around the lower end of the top frame 52, so that the laser emission hole 41 can adjust the laser emission angle, which is convenient for projecting and inspecting the various sides of the workpiece 9.

[0025] In this embodiment, the industrial area array camera 31 can adjust the shooting angle to take pictures of the workpiece 9 to be inspected and transmit them back to the display control device 7. The display control device 7 identifies the location of the scratch and the contour plane information of the two-dimensional plane image through image analysis by software. If no scratch is detected, it passes directly without the need for subsequent 3D camera inspection, which greatly shortens the inspection time. If a scratch is detected, the display control device 7 starts the subsequent inspection program, adjusts the position of the workpiece 9 to be inspected according to the position of the scratch in the picture, and uses the internal light source of the laser profilometer 3D camera 4 to emit a laser beam from the laser emission hole 41 and project it onto the surface of the workpiece 9. The receiving lens 42 captures the laser signal reflected or scattered by the workpiece. These laser signals are transmitted back to the display control device 7, which calculates the three-dimensional contour data of the object surface by combining the principles of triangulation and other methods, analyzes the height difference between the scratch area and the surrounding normal surface, and thus accurately measures the depth information of the scratch. The inspection efficiency is greatly improved by combining the 2D camera with the 3D camera. Example 2

[0026] Based on the above embodiment 1, please refer to the appendix. Figure 2 as well as Figure 6 The mobile platform component 6 includes a placement platform 61, which is provided with a workpiece 9 to be inspected. Several sliding rods 62 are welded to the bottom of the placement platform 61, and the sliding rods 62 are fitted into rectangular through holes 23.

[0027] The bottom end of the slide rod 62 is fitted with the slide shaft 22 and slides together. A movable plate 63 is welded to the lower end of the slide rod 62. The movable plate 63 is penetrated by the screw 64 and rotates in a spiral manner. The screw 64 is connected to one end of the servo motor 65. The servo motor 65 is electrically connected to the controller 8.

[0028] In this embodiment, the servo motor 65 can drive the screw 64 to rotate, which will have a helical effect with the moving plate 63. The helical force will drive the slide rod 62 on the moving plate 63 to slide on the slide shaft 22. The slide rod 62 will drive the placement stage 61 to move forward, so that the detection workpiece 9 on the placement stage 61 can be detected at different angles.

[0029] The working principle and usage process of this utility model are as follows: First, the workpiece 9 to be inspected is placed on the placement platform 61. The shooting angles of the industrial area array camera 31 and the laser profilometer 3D camera 4 are initialized through the display control device 7 so that both are tilted and aligned with the lower right. The power of the controller 8 is turned on, and the inspection program is started through the display control device 7. Subsequently, the industrial area array camera 31 takes pictures of the front and top sides of the workpiece 9 to be inspected and transmits them back to the display control device 7. The display control device 7 issues a command to the controller 8 to start the servo motor 65. Servo motor 65 drives screw 64 to rotate, which interacts with moving plate 63 through a spiral action. The spiral force drives slide rod 62 on moving plate 63 to slide on slide shaft 22. Slide rod 62 drives placement stage 61 forward to the middle of inspection housing 2. Then, display control device 7 starts adjustment motor 35 to rotate. Adjustment motor 35 drives secondary gear 33 to rotate through main gear 34, which in turn drives industrial area array camera 31 on rotating shaft 32 to adjust its angle to align with the lower left, take a picture of the rear side of inspection workpiece 9 and transmit it back to display control device 7. Display control device 7 identifies the location of scratches and contour plane information of two-dimensional plane image through software image analysis. If no scratches are detected, it passes directly without subsequent 3D camera inspection, which greatly shortens the inspection time. If a scratch is detected, the display control device 7 starts the subsequent detection program. According to the location of the scratch in the photo, the controller 8 can control the advancement position of the placement stage 61. When the scratch is located on the front and top side of the workpiece 9, there is no need to adjust the angle of the laser profilometer 3D camera 4, and 3D detection can be performed directly. If the scratch is located on the rear side of the workpiece 9 to be inspected, the servo motor 65 drives the placement stage 61 to the lower left of the laser profilometer 3D camera 4, and starts the rotation motor 54 on the hanging plate 53 to drive the side rod 55 to rotate. The side rod 55 drives the laser profilometer 3D camera 4 to rotate around the lower end of the top frame 52, so that the laser emission hole 41 is aligned with the workpiece 9 to the lower left. During inspection, the laser profilometer 3D camera 4 emits a laser beam from the laser emission hole 41 onto the surface of the workpiece 9. The receiving lens 42 captures the laser signals reflected or scattered by the workpiece. These laser signals are transmitted back to the display control device 7, which calculates the three-dimensional contour data of the object's surface using principles such as triangulation. It analyzes the height difference between the scratched area and the surrounding normal surface, thereby accurately measuring the depth information of the scratch. Finally, the scratch location and depth are displayed on the screen of the display control device 7, completing the inspection.

Claims

1. A defect detection device based on a 2D camera and a 3D camera, comprising a detection table (1) and a detection housing (2) disposed on the detection table (1), characterized in that, It also includes a 2D camera adjustment component (3), a laser profilometer 3D camera (4), a 3D camera adjustment component (5), and a mobile platform component (6), wherein: The testing table (1) is equipped with a display control device (7), and the testing machine housing (2) is provided with a controller (8) on one side. The display control device (7) is electrically connected to the controller (8). The 2D camera adjustment assembly (3) includes an industrial area array camera (31), with rotating shafts (32) welded to both ends of the industrial area array camera (31), and a secondary gear (33) welded to one end of the rotating shaft (32). The secondary gear (33) meshes with a main gear (34) and rotates in cooperation with it. The main gear (34) is connected to one end of the adjustment motor (35). The laser profilometer 3D camera (4) includes a laser emission hole (41), which is a rectangular structure and located on the bottom surface of the laser profilometer 3D camera (4). A receiving lens (42) is provided on one side of the laser emission hole (41) and is inclinedly located on the bottom surface of the laser profilometer 3D camera (4). The laser profilometer 3D camera (4) is electrically connected to a display control device (7).

2. The defect detection device based on a 2D camera and a 3D camera according to claim 1, characterized in that: The testing housing (2) is provided with a groove (21), and a sliding shaft (22) is symmetrically welded inside the groove (21). A rectangular through hole (23) is provided directly above the sliding shaft (22). Two sets of support rods (24) are symmetrically fixed on both sides of the testing housing (2) by bolts.

3. The defect detection device based on a 2D camera and a 3D camera according to claim 2, characterized in that: The regulating motor (35) is fixed to the support rod (24) by screws. The two ends of the rotating shaft (32) are fitted into the support rod (24) and rotate in cooperation. The industrial area array camera (31) is electrically connected to the display control device (7).

4. The defect detection device based on a 2D camera and a 3D camera according to claim 3, characterized in that: The 3D camera adjustment assembly (5) includes a vertical rod (51), a top frame (52), a hanging plate (53), a rotating motor (54), and a side rod (55). The two ends of the vertical rod (51) are fixed to one side of the support rod (24) by bolts.

5. A defect detection device based on a 2D camera and a 3D camera according to claim 4, characterized in that: The top frame (52) has a vertical rod (51) welded on one side. The top frame (52) is fitted into the two sides of the laser profilometer 3D camera (4) and rotates in cooperation. One end of the side rod (55) is fixed to the laser profilometer 3D camera (4) by screws, and the other end is fixedly connected to the rotating motor (54). The rotating motor (54) is fixed to the hanging plate (53) by screws and its axis coincides with the rotation axis of the laser profilometer 3D camera (4).

6. The defect detection device based on a 2D camera and a 3D camera according to claim 1, characterized in that: The mobile platform component (6) includes a placement platform (61), which is provided with a workpiece (9) for inspection. Several sliding rods (62) are welded to the bottom of the placement platform (61), and the sliding rods (62) are fitted into rectangular through holes (23).

7. A defect detection device based on a 2D camera and a 3D camera according to claim 6, characterized in that: The bottom end of the slide rod (62) is fitted with the slide shaft (22) and slides. A movable plate (63) is welded to the lower end of the slide rod (62). The movable plate (63) is penetrated by a screw (64) and rotates in a spiral manner. The screw (64) is connected to one end of a servo motor (65). The servo motor (65) is electrically connected to a controller (8).

Images