Linear scanning platform for appearance detection

Abstract

The line scanning platform comprises detection light source frames, a camera fixing frame, a plane type detection carrier and a cylinder type detection carrier, the cylinder type detection carrier is arranged above the plane type detection carrier, and the two detection light source frames and the camera fixing frame are arranged on the plane type detection carrier in a crossing mode. The camera fixing frame is located between the detection light source frames. According to the invention, by fusing the planar detection station and the cylindrical detection station and increasing the installation freedom degree of the camera and the light source, the detection of the cylindrical and planar products can be realized at the same time, and the compatibility problem of the detection of two different shapes of products, namely the cylindrical and planar products, is solved. And by adjusting the center distance between the driving wheel and the driven wheel, the cylindrical products with different diameters can be compatible, and the size compatibility problem of the cylindrical products is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and in particular to a line scanning platform for appearance detection. Background Art

[0002] Line scanning technology is widely used in modern optical inspection, especially in the fields of surface inspection and defect detection.

[0003] The line scan experimental platform mainly involves a system for image acquisition and processing, which is usually used in industrial inspection, medical imaging, aerospace remote sensing and other fields. The line scan camera is a special imaging device that captures the image of the target object by line scanning. Its core principle is to project the light signal onto the linear array sensor through an optical lens, and then stitch the continuous linear images into a complete two-dimensional image. The advantages of the line scan camera include high resolution, high speed and stable imaging quality, which is particularly suitable for imaging tasks that require long time and high precision.

[0004] Among them, when conducting line scanning experiments on products, the existing process is to manually place flat products for testing, and then switch to cylindrical product testing after the flat product testing is completed. It is impossible to perform line scanning testing on two types of products at the same time. Existing products generally use single-station testing, which takes a long time to test, or because of the use of multiple testing platforms, the design will become complicated and the cost will increase a lot.

[0005] Therefore, we propose a line scanning platform for appearance inspection to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a line scanning platform for appearance inspection to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a line scanning platform for appearance inspection, comprising: an inspection light source frame, a camera fixing frame, a plane inspection carrier and a cylindrical inspection carrier, wherein a cylindrical inspection carrier is arranged above the plane inspection carrier, two inspection light source frames and a camera fixing frame are arranged across the plane inspection carrier, and the camera fixing frame is located between the inspection light source frames; The detection light source frame comprises a vertical linear moving module, the linear moving module is driven to rise and fall to connect the bar light source, and the bar light source is provided with a manual rotating device; The detection light source frame is connected to the X-axis manual adjustment device; The camera fixing frame comprises a vertical linear motion module, and the linear motion module is driven to be lifted and connected to three sets of line scan cameras; The three groups of line scan cameras are respectively oriented towards the left and right directions and the downward direction; The camera fixing frame is connected to the X-axis manual adjustment device; The plane inspection carrier is provided with a plane inspection table, the plane inspection table is connected to an X-axis automatic linear module, and the plane inspection table carries a plane product; The cylindrical inspection carrier comprises a driven roller that can be manually adjusted along the X-axis direction and a fixed, automatically rotating active roller, and the driven roller and the active roller rollingly carry the cylindrical product.

[0008] Preferably, the strip light source is installed in a light source fixture, the light source fixture is arranged on a slide seat, the slide seat is slidably connected to a vertical linear motion module on two upright posts of the light source frame fixed profile, and the linear motion module is an automatic type.

[0009] Preferably, the light source fixture is rotatably connected to the slide seat, and the slide seat is provided with a latch for positioning the rotation angle of the light source fixture and a light source rotation handle.

[0010] Preferably, the line scan camera is installed in a camera fixture, which has three groups distributed on the left, right and lower sides of the precision moving slide. The precision moving slide is electrically driven and slidably connected to the camera Y-axis guide rail, and the camera Y-axis guide rail is slidably connected to the vertical linear moving module on the two columns of the camera fixed profile. The linear moving module is a ball screw lifting module, and a camera lifting drive handwheel box for driving the screw to rotate is arranged at the bottom.

[0011] Preferably, the plane-type detection carrier comprises a platform body with a positioning pulley, a linear module is provided on the upper surface of the platform body, and a plane-type detection table is electrically driven and slidably arranged on the linear module.

[0012] Preferably, the platform body is horizontally movable and penetrates two light source rack mounting plates and one camera rack mounting plate, and the camera rack mounting plate is located between the two light source rack mounting plates; The light source rack mounting plate is fixedly mounted on the light source rack fixing profile, and the camera rack mounting plate is fixedly mounted on the camera fixing profile. An outer linear screw moving assembly and an inner linear screw moving assembly are arranged inside the platform body, wherein the outer linear screw moving assembly is driven to connect to the camera rack mounting plate, and the inner linear screw moving assembly is driven to connect to the two light source rack mounting plates. A first handwheel and a second handwheel are rotatably arranged on one side of the platform body, the first handwheel is coaxially fixedly connected to the screw of the inner linear screw moving assembly, and the second handwheel is coaxially fixedly connected to the screw of the outer linear screw moving assembly.

[0013] Preferably, a cylindrical detection carrier is arranged across the linear module, and the cylindrical detection carrier comprises a fixed platform, on which a driven roller and an active roller are arranged, wherein the driven roller is rotatably arranged in a driven roller fixing plate, and the driven roller fixing plate is fixedly mounted on the movable slide; The active roller is rotatably arranged in the roller fixing frame through a bearing, and a stepping motor is installed at one end of the roller fixing frame. The stepping motor is rotationally driven and connected to the active roller through a coupling.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By integrating the plane inspection station and the cylindrical inspection station and increasing the installation freedom of the camera and light source, it is possible to inspect cylindrical and plane products at the same time, solving the compatibility problem of inspecting two types of products with different shapes, cylindrical products and plane products; 2. In cylindrical inspection vehicles, by adjusting the center distance between the driving wheel and the driven wheel, cylindrical products of different diameters can be compatible, solving the size compatibility problem of cylindrical products; 3. The line scan camera can be fine-tuned in the X and Y directions, so that the line scan camera can have a better field of view and focal length during detection; 4. The overall structure is simple and compact, reasonable and ingenious, easy to maintain, highly clean, takes up less space, switches configurations quickly, is easy to use, has strong versatility, has strong equipment scalability, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 A top view of the present invention; Figure 3 It is a structural schematic diagram of a plane detection light source frame in the present invention; Figure 4 It is a structural schematic diagram of the camera fixing bracket in the present invention; Figure 5 It is a schematic diagram of the structure of the plane inspection carrier in the present invention; Figure 6 It is a side view of the bottom of the plane inspection carrier in the present invention; Figure 7 It is a schematic diagram of the structure of a cylindrical detection carrier and a plane detection carrier in the present invention; Figure 8 It is a schematic diagram of the structure of the cylindrical detection carrier in the present invention.

[0016] In the figure: 1. Detection light source frame; 11. Light source frame fixing profile; 12. Strip light source; 13. Light source fixture; 14. Light source rotating handle; 2. Camera fixing frame; 21. Precision moving slide; 22. Camera fixing profile; 23. Camera lifting drive handwheel box; 24. Camera fixture; 25. Camera Y-axis guide rail; 3. Planar detection carrier; 31. Linear module; 32. Light source frame mounting plate; 33. Camera frame mounting plate; 34. Planar detection platform; 35. First handwheel; 36. Second handwheel; 37. Button box; 38. Platform body; 39. External linear screw moving assembly; 340. Internal linear screw moving assembly; 5. Cylindrical detection carrier; 51. Stepper motor; 52. Fixed platform; 53. Coupling; 54. Bearing; 55. Moving slide; 56. Active roller; 57. Roller fixing frame; 59. Driven roller; 510. Driven roller fixing plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-8 The present invention provides a technical solution: a line scanning platform for appearance inspection, comprising: an inspection light source frame 1, a camera fixing frame 2, a plane inspection carrier 3 and a cylindrical inspection carrier 5, the cylindrical inspection carrier 5 is arranged on the plane inspection carrier 3, two inspection light source frames 1 and a camera fixing frame 2 are arranged across the plane inspection carrier 3, and the camera fixing frame 2 is located between the inspection light source frames 1; Two detection light source racks 1 provide light sources for planar detection and cylindrical detection respectively; The detection light source frame 1 comprises a light source frame fixed profile 11, on the two columns of the light source frame fixed profile 11 are provided with vertical linear moving modules, the linear moving modules drive the connection slide, the slide is provided with a light source rotating handle 14, a light source fixture 13 is rotatably installed on the slide, the light source fixture 13 clamps and connects the bar light source 12, the rotating shaft of the light source rotating handle 14 is fixedly connected to the light source fixture 13, the light source fixture 13 is driven to rotate by rotating the light source rotating handle 14, and the irradiation direction of the bar light source 12 is adjusted; A positioning mechanism is provided between the light source rotating handle 14 and the slide seat. In this embodiment, the light source rotating handle 14 is positioned relative to the slide seat through a latch to fix the irradiation direction of the strip light source 12 and adjust the position of the strip light source 12 at the same time.

[0019] The camera fixing frame 2 comprises a camera fixing profile 22, and vertical linear moving modules are arranged on two columns of the camera fixing profile 22. In the present embodiment, the linear moving module is a ball screw lifting module, and a camera lifting driving hand wheel box 23 for driving the screw to rotate is arranged at the bottom thereof; The camera Y-axis guide rail 25 is slidably arranged on the linear motion module, and the camera lifting and lowering driving hand wheel box 23 is driven to make the ball screw lifting module drive the camera Y-axis guide rail 25 to rise and fall; A precision moving slide 21 is slidably arranged on the camera Y-axis guide rail 25, and a camera fixture 24 is arranged on the precision moving slide 21. The camera fixture 24 has three groups, which are distributed on the left, right and lower sides of the precision moving slide 21, and clamp three groups of line scan cameras, respectively providing shooting for planar detection and cylindrical detection. At the same time, the shooting angle of the line scan camera can be adjusted through the camera fixture 24; The precision moving slide 21 moves along the camera Y-axis guide rail 25 to drive the camera to move along the Y-axis, and at the same time the ball screw lifting module drives it to move along the Z-axis, thereby realizing the dual-axis precision movement of the line scan camera.

[0020] The plane type detection carrier 3 comprises a platform body 38 with a positioning pulley to facilitate the movement of the entire platform; A linear module 31 is provided on the upper surface of the platform body 38, and a plane inspection table 34 is electrically driven and slidably arranged on the linear module 31. By placing the plane product on the plane inspection table 34 and then driving it to slide linearly through the plane inspection light source frame 1 through the linear module 31, visual inspection of the appearance of the plane can be achieved.

[0021] The platform body 38 is horizontally movable and penetrates two light source frame mounting plates 32 and a camera frame mounting plate 33, and the camera frame mounting plate 33 is located between the two light source frame mounting plates 32; The light source frame mounting plate 32 is fixedly mounted on the light source frame fixing profile 11, and the camera frame mounting plate 33 is fixedly mounted on the camera fixing profile 22; An outer linear screw moving assembly 39 and an inner linear screw moving assembly 340 are provided in the platform body 38, wherein the outer linear screw moving assembly 39 is driven to connect to the camera frame mounting plate 33, and the inner linear screw moving assembly 340 is driven to connect to the two light source frame mounting plates 32; A first hand wheel 35 and a second hand wheel 36 are rotatably provided on one side of the platform body 38. The first hand wheel 35 is coaxially fixedly connected to the screw of the inner linear screw moving assembly 340, and the second hand wheel 36 is coaxially fixedly connected to the screw of the outer linear screw moving assembly 39. The inner linear screw moving assembly 340 is driven by the first hand wheel 35, so that the light source frame mounting plate 32 drives the light source frame fixed profile 11 to move, thereby driving the strip light source 12 to move along the X-axis. Similarly, the outer linear screw moving assembly 39 is driven by the second hand wheel 36 to move the camera fixture 24 along the X-axis. The light source, camera and product can achieve three-axis relative movement, ensuring that the light source and camera cover the product, making it more applicable.

[0022] A button box 37 is provided at the edge of the upper surface of the platform body 38 , and the button box 37 is electrically connected to the linear module 31 .

[0023] A cylindrical detection carrier 5 is arranged across the linear module 31, and the cylindrical detection carrier 5 comprises a fixed platform 52, on which a driven roller 59 and an active roller 56 are arranged, wherein the driven roller 59 is rotatably arranged in a driven roller fixing plate 510, and the driven roller fixing plate 510 is fixedly installed on a movable slide 55, and the movable slide 55 is driven by a screw rod to adjust the distance between the driven roller 59 and the active roller 56; The active roller 56 is rotatably arranged in the roller fixing frame 57 through the bearing 54, and a stepping motor 51 is installed at one end of the roller fixing frame 57, and the stepping motor 51 is rotationally driven and connected to the active roller 56 through the coupling 53; The rotation of the active roller 56 drives the cylindrical products to roll at a uniform and stable speed, and the position of the driven roller 59 is adjusted to adapt to cylindrical products of different diameters.

[0024] Working principle: manually place the cylindrical products and flat products to be inspected on the cylindrical inspection carrier 5 and the flat inspection carrier 3 respectively; The angles and positions of the strip light source 12 and the camera are adjusted according to the positions of the products, and line scan visual inspection is performed on the two types of products.

[0025] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A line scanning platform for appearance inspection, comprising: A detection light source frame (1), a camera fixing frame (2), a plane detection carrier (3) and a cylindrical detection carrier (5), characterized in that: a cylindrical detection carrier (5) is arranged above the plane detection carrier (3), two detection light source frames (1) and a camera fixing frame (2) are arranged across the plane detection carrier (3), and the camera fixing frame (2) is located between the detection light source frames (1); The detection light source frame (1) comprises a vertical linear motion module, the linear motion module is driven to rise and fall to connect to the strip light source (12), and the strip light source (12) is provided with a manual rotation device; The detection light source frame (1) is connected to an X-axis manual adjustment device; The camera fixing frame (2) comprises a vertical linear motion module, and the linear motion module is driven to rise and fall and connect three groups of line scan cameras; The three groups of line scan cameras are respectively oriented towards the left and right directions and the downward direction; The camera fixing frame (2) is connected to the X-axis manual adjustment device; The plane inspection carrier (3) is provided with a plane inspection table (34), the plane inspection table (34) is connected to an X-axis automatic linear module (31), and the plane inspection table (34) carries a plane product; The cylindrical inspection carrier (5) comprises a driven roller (59) that can be manually adjusted along the X-axis direction and a fixed, automatically rotating active roller (56), wherein the driven roller (59) and the active roller (56) rollably carry the cylindrical product.

2. A line scanning platform for appearance inspection according to claim 1, characterized in that: The strip light source (12) is installed in a light source fixture (13), and the light source fixture (13) is arranged on a slide seat, and the slide seat is slidably connected to a vertical linear motion module on two upright posts of the light source frame fixed profile (11), and the linear motion module is an automatic type.

3. A line scanning platform for appearance inspection according to claim 2, characterized in that: The light source fixture (13) is rotatably connected to the slide seat, and a latch for positioning the rotation angle of the light source fixture (13) and a light source rotation handle (14) are provided on the slide seat. The light source fixture (13) is driven to rotate by rotating the light source rotation handle (14), thereby adjusting the irradiation direction of the strip light source (12).

4. The line scanning platform for appearance inspection according to claim 1, characterized in that: The line scan camera is installed in a camera fixture (24). The camera fixture (24) is provided with three groups, which are distributed on the left, right and lower sides of the precision moving slide (21). The precision moving slide (21) is electrically driven to slide and connect to the camera Y-axis guide rail (25). The camera Y-axis guide rail (25) is slidably connected to the vertical linear moving modules on the two columns of the camera fixed profile (22). The linear moving module is a ball screw lifting module. A camera lifting driving handwheel box (23) for driving the screw to rotate is arranged at the bottom of the linear moving module. The ball screw lifting module drives the camera Y-axis guide rail (25) to be lifted and lowered by the camera lifting driving handwheel box (23). The precision moving slide (21) moves along the camera Y-axis guide rail (25), driving the camera to move along the Y-axis direction. At the same time, the ball screw lifting module drives it to move along the Z-axis direction, thereby realizing the dual-axis precision movement of the line scan camera.

5. The line scanning platform for appearance inspection according to claim 1, characterized in that: The plane inspection carrier (3) comprises a platform body (38) with a positioning pulley, a linear module (31) is provided on the upper surface of the platform body (38), and a plane inspection table (34) is electrically driven and slidably arranged on the linear module (31). By placing a plane product on the plane inspection table (34), and then driving the linear module (31) to linearly slide through a plane inspection light source frame (1), visual inspection of the appearance of the plane is achieved.

6. A line scanning platform for appearance inspection according to claim 5, characterized in that: The platform body (38) is horizontally movable and penetrates two light source frame mounting plates (32) and a camera frame mounting plate (33), and the camera frame mounting plate (33) is located between the two light source frame mounting plates (32).

7. A line scanning platform for appearance inspection according to claim 6, characterized in that: The light source frame mounting plate (32) is fixedly mounted on the light source frame fixed profile (11), and the camera frame mounting plate (33) is fixedly mounted on the camera fixed profile (22). An outer linear screw moving assembly (39) and an inner linear screw moving assembly (340) are provided inside the platform body (38), wherein the outer linear screw moving assembly (39) is driven to connect to the camera frame mounting plate (33), and the inner linear screw moving assembly (340) is driven to connect to the two light source frame mounting plates (32). A first hand wheel (35) and a second hand wheel (36) are rotatably provided on one side of the platform body (38). 6), the first hand wheel (35) is coaxially fixedly connected to the screw of the inner linear screw moving assembly (340), and the second hand wheel (36) is coaxially fixedly connected to the screw of the outer linear screw moving assembly (39). The inner linear screw moving assembly (340) is driven by the first hand wheel (35), so that the light source frame mounting plate (32) drives the light source frame fixed profile (11) to move, thereby driving the strip light source (12) to move along the X-axis. Similarly, the outer linear screw moving assembly (39) is driven by the second hand wheel (36) to move the camera fixture (24) along the X-axis.

8. The line scanning platform for appearance inspection according to claim 5, characterized in that: A cylindrical detection carrier (5) is arranged across the linear module (31), the cylindrical detection carrier (5) comprising a fixed platform (52), a driven roller (59) and a driving roller (56) are arranged on the fixed platform (52), wherein the driven roller (59) is rotatably arranged in a driven roller fixing plate (510), the driven roller fixing plate (510) is fixedly mounted on a movable slide (55), and the movable slide (55) is driven by a screw rod to adjust the distance between the driven roller (59) and the driving roller (56); The active roller (56) is rotatably arranged in a roller fixing frame (57) via a bearing (54), and a stepping motor (51) is installed at one end of the roller fixing frame (57), and the stepping motor (51) is rotationally driven and connected to the active roller (56) via a coupling (53); The rotation of the active roller (56) drives the cylindrical product to roll at a uniform and stable speed, and the position of the driven roller (59) is adjusted to adapt to cylindrical products with different diameters.

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