High-precision appearance detection device and equipment based on printed circuit

Abstract

The utility model relates to a high-precision appearance detection device and equipment based on a printed circuit, the high-precision appearance detection device comprises a first detection assembly and a second detection assembly, the first detection assembly comprises a first portal frame and a first conveying frame, the first conveying frame is arranged at the bottom of the first portal frame, and the top of the first portal frame is provided with a first linear module; a 3D camera is arranged on a sliding seat of the linear module; the second detection assembly comprises a second portal frame and a second conveying frame, the second conveying frame is arranged at the bottom of the second portal frame, a first 2D camera and a second 2D camera are arranged on the two sides of the top of the second portal frame respectively, and a first light source is arranged at the bottom of the second conveying frame; a second light source and a third light source are arranged between the second portal frames; a lens end of the first 2D camera is arranged on a reflection light path of the second light source; and the third light source is arranged at the lens end of the second 2D camera. According to the utility model, the detection stability is ensured, the detection efficiency and accuracy are improved, and the time and the cost are greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of printed circuit board manufacturing, in particular to a high-precision appearance detection device and equipment based on printed circuits. Background Art

[0002] A printed circuit board is a substrate composed of insulating materials and conductive lines, used to support and connect electronic components. It is made using electronic printing technology, hence the name. The main function of a printed circuit board is to provide electrical connections between electronic components and to serve as a support for the components.

[0003] During the production process of printed circuit boards, there are many types of product defects, and the defect shapes vary, making it difficult to achieve accurate detection. For example, it is necessary to detect the warpage and defects of printed circuit boards. The size and shape of warpage and defects vary greatly, and the area of ​​the smallest defect is only 0.0004 square millimeters, so it is extremely difficult to achieve good detection results.

[0004] The conventional method in the prior art is to manually inspect each product on the printed circuit board individually under an optical microscope with only one light source, and the number of products on different types of printed circuit boards varies. When the number of products on the printed circuit boards increases, the manual inspection time and manual inspection accuracy will be greatly increased, affecting production efficiency and making it difficult to grasp the inspection standards. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defects of low detection efficiency and inaccurate detection results of printed circuit boards in the prior art.

[0006] In order to solve the above technical problems, the utility model provides a high-precision appearance detection device based on printed circuits, comprising:

[0007] A first detection component, the first detection component comprises a first gantry and a first conveying frame, the first conveying frame is arranged at the bottom of the first gantry, a first linear module is arranged on the top of the first gantry, the axis of the first linear module is perpendicular to the length axis direction of the first conveying frame; a 3D camera is arranged on the slide seat of the linear module, and the 3D camera is facing the first conveying frame;

[0008] The second detection component, the second detection component includes a second gantry and a second conveyor, the second conveyor is arranged at the bottom of the second gantry, on both sides of the top of the second gantry, a first 2D camera and a second 2D camera are respectively arranged, at the bottom of the second conveyor, a first light source is arranged, and the first light source is arranged facing the second conveyor; between the second gantries, a second light source and a third light source are arranged, the second light source is arranged obliquely to the surface of the second conveyor, and the lens end of the first 2D camera is arranged on the reflection light path of the second light source; the second camera is arranged facing the second conveyor, and the third light source is arranged at the lens end of the second 2D camera.

[0009] In an embodiment of the present invention, product fixtures are arranged on both the first conveyor and the second conveyor, and the product fixtures are slidably connected between the first conveyor and the second conveyor.

[0010] In an embodiment of the present invention, a second linear module is arranged on one side of the first conveyor and the second conveyor, the product fixture is connected to the slider of the second linear module, and the product fixture is connected to the side far from the second linear module through a slider.

[0011] In an embodiment of the present invention, a backing plate is arranged on the surface of the product fixture, and a limiting air cylinder is arranged on the opposite side of the backing plate.

[0012] In an embodiment of the present invention, both the first light source and the second light source are strip light sources.

[0013] In an embodiment of the present invention, the third light source is a coaxial light source.

[0014] In an embodiment of the present invention, a first adjustment frame is arranged between the first 2D camera and the second gantry, and a second adjustment frame is arranged between the second 2D camera and the second gantry.

[0015] In an embodiment of the present invention, an adjustment plate is arranged between the second light source and the gantry, and adjustment holes are arranged on the adjustment plate.

[0016] In an embodiment of the present invention, both the first 2D camera and the second 2D camera are linear array cameras.

[0017] A high-precision appearance detection device based on a printed circuit includes the high-precision appearance detection device based on the printed circuit described above.

[0018] The above technical solution of the present invention has the following advantages compared with the prior art:

[0019] A high-precision appearance detection device and equipment based on printed circuits according to the present utility model combines the recognition of printed circuit boards with vision detection technology. The recognition camera takes pictures of the surface of the printed circuit board from multiple angles with the supplementary light source, and identifies and analyzes the pictures, ensuring the stability of detection, improving the detection efficiency and accuracy, and greatly saving time and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments of the present utility model in conjunction with the drawings, where

[0021] Figure 1 is the overall structural schematic diagram of the present utility model;

[0022] Figure 2 is Figure 1 the structural schematic diagram of the first detection component in

[0023] Figure 3 is Figure 1 the structural schematic diagram of the second detection component in

[0024] Figure 4 is Figure 3 the partial structural schematic diagram of part A in

[0025] Description of the reference numerals in the drawings: 1, the first detection component; 2, the second detection component; 3, the product fixture; 11, the first gantry; 12, the first conveyor; 13, the first linear module; 14, the 3D camera; 15, the second linear module; 16, the slider; 21, the second gantry; 22, the second conveyor; 23, the first 2D camera; 24, the second 2D camera; 25, the first light source; 26, the second light source; 27, the third light source; 28, the first adjustment frame; 29, the second adjustment frame; 31, the backing plate; 32, the limit cylinder; 261, the adjustment plate; 262, the adjustment hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following further describes the present utility model in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments given are not intended to limit the present utility model.

[0027] Embodiment 1

[0028] Referring to Figures 1-4 as shown, the present utility model discloses a high-precision appearance detection device based on printed circuits, including:

[0029] The first detection component 1, the first detection component 1 includes a first gantry 11 and a first conveyor 12, the first conveyor 12 is arranged at the bottom of the first gantry 11, a first linear module 13 is arranged at the top of the first gantry 11, and the axis of the first linear module 13 is perpendicular to the length axis direction of the first conveyor 12; a 3D camera 14 is arranged on the slide of the linear module, and the 3D camera 14 faces the first conveyor 12;

[0030] The second detection component 2, the second detection component 2 includes a second gantry 21 and a second conveyor 22, the second conveyor 22 is arranged at the bottom of the second gantry 21, a first 2D camera 23 and a second 2D camera 24 are respectively arranged on both sides of the top of the second gantry 21, a first light source 25 is arranged at the bottom of the second conveyor 22, and the first light source 25 is arranged facing the second conveyor 22; a second light source 26 and a third light source 27 are arranged between the second gantries 21, the second light source 26 is arranged obliquely to the surface of the second conveyor 22, and the lens end of the first 2D camera 23 is arranged on the reflection light path of the second light source 26; the second camera is arranged facing the second conveyor 22, and the third light source 27 is arranged at the lens end of the second 2D camera 24.

[0031] It can be seen that the overall structure of the present utility model includes two parts, wherein the first detection component 1 is used to detect the warping of the product surface, and the second detection component 2 is used to detect the defects on the product surface. Specifically, the 3D camera on the first gantry 11 moves reciprocally left and right driven by the first linear module 13. When the bottom first conveyor 12 drives the product to pass under the 3D camera, the 3D camera scans the laser left and right, uploads the taken photos to the host computer, and analyzes the surface defects of the product through software. As a preferred solution of the present utility model, the 3D camera is a laser scanner. During actual use, the product moves along with the first conveyor 12 during detection. At the same time, after the 3D camera takes a group of pictures, it moves to the next position. The 3D camera moves four times at the working station and takes a total of four images to complete the detection and scan the warping defects on the product surface.

[0032] After 3D scanning is completed, the product is transported to the second conveyor rack 22 for identification. The first 2D camera 23 at the top is used to take pictures of the bottom surface of the product. The first light source 25 is arranged at the bottom of the second conveyor rack 22, and the light of the first light source 25 shines into the product from the back; the first 2D camera 23 takes pictures from the front, and the pictures are uploaded to the host computer for analysis. Secondly, the second light source 26 is inclined to the surface of the second conveyor rack 22, and the light is emitted to the surface of the product. The lens end of the first 2D camera 23 receives the reflected light to identify the surface defects of the product. The lens end of the second 2D camera 24 is arranged facing the conveyor rack, and cooperates with the third light source 27 at the lens end to identify the front defects of the product. The above-mentioned first light source 25, second light source 26 and third light source 27 are all supplementary light sources, which ensure that the camera can accurately identify defects during photographing and improve the accuracy of the detection results.

[0033] This utility model combines the identification of printed circuit boards with vision detection technology. The identification camera takes pictures of the surface of the printed circuit board from multiple angles and cooperates with supplementary light sources to take pictures of the product surface, and identifies and analyzes the pictures, ensuring the stability of the detection, improving the detection efficiency and accuracy, and greatly saving time and cost.

[0034] Furthermore, product fixtures 3 are arranged on both the first conveyor rack 12 and the second conveyor rack 22, and the product fixtures 3 are slidably connected to the first conveyor rack 12 and the second conveyor rack 22.

[0035] Specifically, the product fixture 3 is used for storing and fixing the product. As a preferred solution of this utility model, a second linear module 15 is arranged on one side of the first conveyor rack 12 and the second conveyor rack 22. The product fixture 3 is connected to the slider of the second linear module 15, and the product fixture 3 is connected to the side far from the second linear module 15 through a slider 16. The second linear module 15 drives the product fixture 3 to reciprocate on the first conveyor rack 12 and the second conveyor rack 22.

[0036] In an embodiment of this utility model, a backing plate 31 is arranged on the surface of the product fixture 3, and a limiting air cylinder 32 is arranged on the opposite side of the backing plate 31.

[0037] Specifically, the product is fixed by the limiting air cylinder 32. The limiting air cylinder 32 extends to clamp the product between the limiting air cylinder 32 and the backing plate 31, ensuring the stability of the product during the detection process and avoiding affecting the accuracy of the detection results.

[0038] Furthermore, both the first light source 25 and the second light source 26 are strip light sources. The third light source 27 is a coaxial light source.

[0039] Specifically, the widths of the first light source 25 and the second light source 26 are greater than the width of the product, ensuring that the light rays of the first light source 25, the second light source 26, and the third light source 27 can completely cover the surface of the product. Similarly, two groups of the first 2D camera 23 and the second 2D camera 24 are arranged along the top cross beam of the second gantry 21. After combination, the viewing angle of the lens can cover the entire bottom product, avoiding the phenomenon of missed detection. The third light source 27 is a coaxial light source arranged at the camera end of the second 2D camera 24 to supplement light for the identification of the product facing the bottom.

[0040] Further, a first adjusting frame 28 is arranged between the first 2D camera 23 and the second gantry 21, and a second adjusting frame 29 is arranged between the second 2D camera 24 and the second gantry 21.

[0041] Specifically, the first adjusting frame 28 is used to adjust the angle and height of the first 2D camera 23 to ensure that both the transmitted light of the first light source 25 and the reflected light of the second light source 26 at the bottom can be identified simultaneously. By adjusting the angle of the second 2D camera 24 through the second adjusting frame, it is ensured that the lens of the second 2D camera 24 is facing the bottom product. As a preferred solution of the present utility model, the product fixture 3 mentioned above is transparent, and the first light source 25 at the bottom can directly irradiate the bottom of the product.

[0042] Further, an adjusting plate 261 is arranged between the second light source 26 and the gantry, and adjusting holes 262 are arranged on the adjusting plate 261. Specifically, the adjusting holes are arc-shaped holes, and the second light source 26 can be rotated to adjust the incident angle of the light of the second light source 26.

[0043] As a preferred solution of the present utility model, both the first 2D camera 23 and the second 2D camera 24 are linear array cameras. They have high resolution and high sampling rate. By increasing the number of pixels of the photosensitive chip, a higher image resolution can be obtained, improving the accuracy of the detection result. Secondly, the sampling frequency can be as high as megahertz, which can ensure the rapid capture of high-speed movement and high-precision high-speed detection, improving the detection efficiency.

[0044] Embodiment 2

[0045] A high-precision appearance detection device based on a printed circuit includes the high-precision appearance detection device based on a printed circuit described in Embodiment 1.

[0046] In summary, the present utility model introduces a high-precision appearance detection device and equipment based on a printed circuit. The specific detection process is as follows: The product moves along with the first conveyor rack 12. At the same time, after the 3D camera takes a set of pictures, it moves to the next position, moves four times on the first conveyor rack 12, and takes a total of four images to complete the detection. After the shooting is completed, it is transported to the second detection component 2 by the handling mechanism; The product moves on the second conveyor rack 22. First, the first 2D camera 23 corresponding to the backlight and the second 2D camera 24 corresponding to the coaxial light take pictures. There are two groups of cameras in total, and each group has two cameras, one on the left and one on the right; The two groups of cameras with three light sources take pictures row by row in turn, and each takes 18,000 rows; When returning, the first 2D camera 23 takes pictures with the positive light corresponding to the second light source 26, and the detection algorithm selects appropriate pictures for algorithm processing according to different defects. The present utility model combines the identification of printed circuit boards with vision detection technology. By using the identification camera to take pictures of the surface of the printed circuit board from multiple angles and supplementing light sources to take pictures of the product surface, and identifying and analyzing the pictures, it ensures the stability of the detection, improves the detection efficiency and accuracy, and greatly saves time and cost.

[0047] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present utility model.

Claims

1. A high-precision appearance inspection device based on printed circuits, characterized in that: include: A first detection component, the first detection component comprises a first gantry and a first conveying frame, the first conveying frame is arranged at the bottom of the first gantry, a first linear module is arranged on the top of the first gantry, the axis of the first linear module is perpendicular to the length axis direction of the first conveying frame; a 3D camera is arranged on the slide seat of the linear module, and the 3D camera is facing the first conveying frame; The second detection component comprises a second gantry and a second conveying frame, the second conveying frame is arranged at the bottom of the second gantry, a first 2D camera and a second 2D camera are respectively arranged on both sides of the top of the second gantry, a first light source is arranged at the bottom of the second conveying frame, and the first light source is arranged opposite to the second conveying frame; a second light source and a third light source are arranged between the second gantries, the second light source is arranged obliquely to the surface of the second conveying frame, and the lens end of the first 2D camera is arranged on the reflected light path of the second light source; the second camera is arranged opposite to the second conveying frame, and the third light source is arranged at the lens end of the second 2D camera.

2. The high-precision appearance inspection device based on printed circuit according to claim 1, characterized in that: The first conveying frame and the second conveying frame are both provided with a product jig, and the product jig is slidably connected with the first conveying frame and the second conveying frame.

3. The high-precision appearance inspection device based on printed circuit according to claim 2, characterized in that: A second linear module is disposed on one side of the first conveying frame and the second conveying frame, the product fixture is connected to a slide seat of the second linear module, and the product fixture is connected to a side away from the second linear module via a slider.

4. The high-precision appearance inspection device based on printed circuit according to claim 2, characterized in that: A backing plate is arranged on the surface of the product fixture, and a limiting cylinder is arranged on a side opposite to the backing plate.

5. The high-precision appearance inspection device based on printed circuit according to claim 1, characterized in that: The first light source and the second light source are both bar-shaped light sources.

6. The high-precision appearance inspection device based on printed circuit according to claim 1, characterized in that: The third light source is a coaxial light source.

7. The high-precision appearance inspection device based on printed circuit according to claim 1, characterized in that: A first adjustment frame is arranged between the first 2D camera and the second gantry, and a second adjustment frame is arranged between the second 2D camera and the second gantry.

8. The high-precision appearance inspection device based on printed circuit according to claim 1, characterized in that: An adjustment plate is arranged between the second light source and the gantry, and an adjustment hole is arranged on the adjustment plate.

9. The high-precision appearance inspection device based on printed circuit according to claim 1, characterized in that: The first 2D camera and the second 2D camera are both linear array cameras.

10. A high-precision appearance inspection device based on printed circuits, characterized in that: It comprises a high-precision appearance detection device based on printed circuits as described in any one of claims 1 to 9.

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