Multi-mode online image acquisition system for detecting defects of circuit board

Abstract

The utility model discloses a multi-mode on-line image acquisition system for detecting circuit board defects, which comprises a slide rail, a circuit box body arranged on the slide rail, a first telescopic pipe arranged on the circuit box body, a long rod fixedly connected to the side wall of the circuit box body, and a slide block slidably sleeved at one end of the long rod far away from the circuit box body, a tension spring is fixedly connected between the circuit box body and the sliding block, a second telescopic pipe is vertically arranged on the top face of the sliding block, a first transverse rod is rotationally arranged on the circumferential outer wall of the first telescopic pipe, a second transverse rod is rotationally arranged on the circumferential outer wall of the second telescopic pipe, and a first clamping block is fixedly connected to the end, pointing to the second telescopic pipe, of the first transverse rod. The end, pointing to the first telescopic pipe, of the second transverse rod is fixedly connected with a second clamping block, and an infrared thermal imaging detection module and an ultraviolet light detection module are sequentially arranged on the sliding rail. The beneficial effects of the utility model are that accurate control of the moving direction and position of the circuit board is realized through the slide rail, and the telescopic pipe can adjust the horizontal height of the circuit board, thereby adapting to circuit boards of different sizes and types.

Description

Technical Field

[0001] The utility model relates to a circuit board defect acquisition system, in particular to a multi-modal online image acquisition system for detecting circuit board defects. Background Art

[0002] As electronic products develop towards high performance and miniaturization, the design of circuit boards is becoming more and more complex, and the requirements for their quality are also increasing. However, circuit boards are prone to various defects during the production process, such as solder joint defects, cracks, short circuits, open circuits, etc., which trigger diverse processing requirements, including precise positioning, fixing, reversal, and operation in high temperature environments.

[0003] Traditional circuit board inspection methods mainly rely on manual visual inspection and single-mode inspection technology, such as using only X-ray or visible light inspection. These methods are not only inefficient, but also have limited ability to identify some minor defects, especially in the inspection of complex circuit boards, which are prone to omissions and misjudgments.

[0004] In addition, existing circuit board processing equipment also has limitations in some aspects, such as the lack of flexibility to adapt to different circuit board sizes, the ability to maintain stable operation under high temperature conditions, and the ability to perform complex operations (such as precise reversal). In addition, manual operation is not only inefficient, but also has operational errors, resulting in unstable product quality and low production efficiency; Utility Model Content

[0005] The purpose of the utility model is to provide an image acquisition system which is applicable to circuit boards of different specifications, realizes automatic detection, and improves acquisition accuracy and stability.

[0006] The utility model is realized by such a technical scheme, a multimodal online image acquisition system for detecting defects of a circuit board, comprising a slide rail, a movable circuit box is slidably arranged on the slide rail, a first telescopic tube is vertically arranged on the top surface of the circuit box, a long rod is fixedly connected to the side wall of the circuit box, a slider is slidably sleeved on one end of the long rod away from the circuit box, a tension spring is fixedly connected between the circuit box and the slider, the extension direction of the tension spring is parallel to the long rod, a second telescopic tube is vertically arranged on the top surface of the slider, a first cross bar is rotatably arranged on the top circumferential outer wall of the first telescopic tube, the first cross bar is perpendicular to the axis of the first telescopic tube, a second cross bar is rotatably arranged on the top circumferential outer wall of the second telescopic tube, the second cross bar is perpendicular to the axis of the second telescopic tube, a first clamping block is fixedly connected to one end of the first cross bar pointing to the second telescopic tube, a second clamping block is fixedly connected to one end of the second cross bar pointing to the first telescopic tube, and an infrared thermal imaging detection module and an ultraviolet light detection module are sequentially arranged in the length direction of the slide rail.

[0007] The beneficial effects of the utility model are: the moving direction and position of the circuit board can be accurately controlled by the slide rail, the telescopic tube can adjust the horizontal height of the circuit board, and ensure that the circuit board has enough space during the flipping process, so as to adapt to circuit boards of different sizes and types.

[0008] Preferably, the second clamping block is L-shaped and is made of high temperature resistant material.

[0009] The beneficial effects of the above preferred solution are: the L-shaped clamping block can limit and fix the circuit board, and the clamping block is made of high-temperature resistant material to ensure that the performance is not affected in a high-temperature operating environment, while preventing scratches on the circuit board.

[0010] Preferably, the infrared thermal imaging detection module includes a first box body, which is mounted on the slide rail, and each surface of the inner wall of the first box body is paved with an infrared light diffuse reflection film, and a height adjustment frame is provided on the top surface of the first box body, and the height adjustment frame is in a vertical relationship with the slide rail, and at least two photosensitive cameras are arranged on the height adjustment frame.

[0011] The beneficial effect of the above preferred solution is that by adding an infrared thermal imaging detection module, thermal anomalies caused by defects such as internal short circuits, reverse connection, and overheating of solder joints in the circuit board can be captured, thereby revealing hidden defects.

[0012] Preferably, the ultraviolet light detection module includes a second box body, the second box body is mounted on the slide rail, each surface of the inner wall of the second box body is paved with ultraviolet light diffuse reflection film, the top surface of the second box body is provided with a lifting device, the lifting device is in a vertical relationship with the slide rail, color cameras are provided at both ends of the lifting device in the length direction, and a light source element is provided on the lifting device, the light source element includes an ultraviolet lamp, an ultraviolet reflective cover is provided on the outer cover of the ultraviolet lamp, the side of the ultraviolet reflective cover facing the slide rail is a filter plate, and the ultraviolet lamp projects the light source in the direction of the filter plate.

[0013] The beneficial effect of the above preferred solution is: by adding an ultraviolet light detection module, ultraviolet light irradiates the circuit board, and the camera collects the reflected light to detect the fluorescent reaction of a specific material, thereby identifying defects caused by chemical reactions or material aging.

[0014] Preferably, a bandpass filter is provided on the color camera lens, and the color camera is a first industrial RGB color camera.

[0015] The beneficial effect of the above preferred scheme is that the first industrial RGB color camera collects ultraviolet light transmitted by the circuit board from above through a bandpass filter to obtain ultraviolet transmission photos, as well as photos of the circuit board reflecting fluorescent information to determine whether there is chemical contamination, which are used to detect defects caused by organic pollutants or chemical corrosion.

[0016] Preferably, the ultraviolet reflective cover is semicircular.

[0017] Preferably, the second box body is provided with blackout curtains at the front and rear sides along the slide rail direction.

[0018] The beneficial effects of the above preferred solution are: the reflective cover is in a semicircular arc shape and a blackout curtain is arranged along the direction of the slide rail, which can optimize the detection effect and ensure the clarity and accuracy of the image.

[0019] Preferably, it also includes an information transmission module, a control module and a data processing module, the information transmission module is electrically connected to the control module, the control module is electrically connected to the data processing module, the information transmission module is also electrically connected to the data processing module, the control module controls the rotation of the first cross bar and the second cross bar, and controls the circuit box, and the data processing module is used to process image data of the industrial camera.

[0020] Preferably, a steering rail is provided in the extending direction of the slide rail.

[0021] The beneficial effects of the above preferred solution are: the control module receives the operator's instructions and dynamically adjusts the working states of the first crossbar, the second crossbar, the circuit box, the steering rail and the detection module to adapt to different detection requirements;

[0022] The information transmission module is responsible for connecting the photosensitive camera and the color camera, and interacting with the data processing module, the control module and the steering rail to optimize the image acquisition process;

[0023] The data processing module uses advanced image processing technology and algorithms to analyze and process the collected image data, identify various defects on the circuit board, electrically connect the information transmission module and the control module, and transfer the defective circuit board to the steering rail control.

[0024] The utility model has an improved structure, realizes automatic flipping of the detection process, improves circuit board production efficiency and product qualification rate, and uses infrared thermal imaging and ultraviolet light detection modules together to significantly improve the accuracy and precision of circuit board detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a partial schematic diagram of the circuit board clamping device of the utility model

[0026] Figure 2 This is a schematic diagram of the overall structure of the utility model

[0027] Figure 3 This is a top view of the overall structure of the utility model

[0028] Figure 4This is a partial top view of the circuit board clamping device of the utility model

[0029] Figure 5 This is a schematic diagram of the infrared thermal imaging detection module of the utility model

[0030] Figure 6 This is a schematic diagram of the ultraviolet light detection module of the utility model

[0031] Figure 7 This is the circuit control principle block diagram of the utility model

[0032] In the figure: 1, slide rail; 2, movable circuit box; 3, first telescopic tube; 4, long rod; 5, slider; 6, tension spring; 7, second telescopic tube; 8, first cross bar; 9, second cross bar; 10, first clamping block; 11, second clamping block; 12, infrared thermal imaging detection module; 13, ultraviolet detection module; 14, first box; 16, height adjustment frame; 17, photosensitive camera; 18, second box; 20, lifting device; 21, color camera; 22, ultraviolet lamp; 23, reflective cover; 24, filter plate; 25, bandpass filter; 26, blackout curtain; 27, steering rail. DETAILED DESCRIPTION

[0033] In order to make the technical purpose, technical solution and beneficial effects of the present invention clearer, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0035] Example 1

[0036] like Figures 1 to 6As shown, a multimodal online image acquisition system for detecting circuit board defects comprises a slide rail 1, a movable circuit box 2 is slidably arranged on the slide rail 1, a first telescopic tube 3 is vertically arranged on the top surface of the circuit box 2, a long rod 4 is fixedly connected to the side wall of the circuit box 2, a slider 5 is slidably sleeved on one end of the long rod 4 away from the circuit box 2, a tension spring 6 is fixedly connected between the circuit box 2 and the slider 5, the extension direction of the tension spring 6 is parallel to the long rod 4, a second telescopic tube 7 is vertically arranged on the top surface of the slider 5, and a first telescopic tube 3 is fixedly connected to the top of the first telescopic tube 3. A first cross bar 8 is rotatably provided on the outer circumferential wall of the first part, and the first cross bar 8 is perpendicular to the axis of the first telescopic tube 3. A second cross bar 9 is rotatably provided on the outer circumferential wall of the top of the second telescopic tube 7, and the second cross bar 9 is perpendicular to the axis of the second telescopic tube 7. A first clamping block 10 is fixedly connected to one end of the first cross bar 8 pointing to the second telescopic tube 7, and a second clamping block 11 is fixedly connected to one end of the second cross bar 9 pointing to the first telescopic tube 3. An infrared thermal imaging detection module 12 and an ultraviolet light detection module 13 are sequentially arranged in the length direction of the slide rail 1.

[0037] Preferably, the second clamping block 11 is L-shaped and is made of high temperature resistant material.

[0038] In this embodiment, when it is necessary to inspect the circuit board, the slider 5 is manually pulled to separate the first clamping block 10 and the second clamping block 11 to a distance suitable for the length of the circuit board, and the circuit board is placed and adjusted in position. After releasing the hand, the tension of the tension spring 6 pulls the slider 5 toward the movable circuit box 2, so that the diagonal line of the circuit board is limited and clamped by the first clamping block 10 and the second clamping block 11. At the same time, the staff adjusts the height of the first telescopic tube 3 and the second telescopic tube 7 according to work needs to increase the flipping space of the circuit board.

[0039] The control module drives the circuit box 2 to move on the slide rail 1, and passes through the infrared thermal imaging detection module 12 and the ultraviolet light detection module 13 to perform circuit board detection.

[0040] Specifically, the first telescopic tube 3 and the second telescopic tube 7 are multi-section devices, and the topmost section can rotate around the axis. The first cross bar 8 and the second cross bar 9 can be driven to swing and displace by rotating the topmost section of the first telescopic tube 3 and the second telescopic tube 7, so as to adjust the horizontal relationship between the first clamping block 10 and the second clamping block 11 and balance the clamping stress on the circuit board. The first cross bar 8 and the second cross bar 9 can rotate by themselves to drive the first clamping block 10 and the second clamping block 11 to rotate, so as to realize the diagonal flipping of the circuit board.

[0041] Example 2

[0042] like Figures 1 to 6As shown, preferably, on the basis of Example 1, the infrared thermal imaging detection module 12 includes a first box body 14, the first box body 14 is mounted on the slide rail 1, each surface of the inner wall of the first box body 14 is paved with an infrared light diffuse reflection film 15, and the top surface of the first box body 14 is provided with a height adjustment frame 16, the height adjustment frame 16 is in a vertical relationship with the slide rail 1, and at least two photosensitive cameras 17 are arranged on the height adjustment frame 16.

[0043] Preferably, the ultraviolet light detection module 13 includes a second box body 18, the second box body 18 is mounted on the slide rail 1, and each surface of the inner wall of the second box body 18 is paved with an ultraviolet light diffuse reflection film 19. A lifting device 20 is provided on the top surface of the second box body 18, and the lifting device 20 is in a vertical relationship with the slide rail 1. Color cameras 21 are provided at both ends of the lifting device 20 in the length direction. A light source element is provided on the lifting device 20, and the light source element includes an ultraviolet lamp 22. The ultraviolet lamp 22 is provided with an ultraviolet reflective cover 23 on its outer cover, and the ultraviolet reflective cover 23 has a filter plate 24 on one side facing the slide rail 1, and the ultraviolet lamp 22 projects light in the direction of the filter plate 24.

[0044] Preferably, a bandpass filter 25 is provided on the lens of the color camera 21, and the color camera 21 is a first industrial RGB color camera.

[0045] Preferably, the ultraviolet reflective cover 23 is semicircular.

[0046] Preferably, the second box body 18 is provided with blackout curtains 26 at the front and rear sides along the slide rail 1 .

[0047] In this embodiment, after the circuit board to be inspected passes through the slide rail 1 and enters the infrared thermal imaging detection module 12, it is photographed by the photosensitive camera 17 to form a captured image; then it passes through the ultraviolet light detection module 13, and the circuit board is irradiated by the ultraviolet lamp 22, and the color camera 21 collects the captured image. The blackout curtain 26 makes the image acquisition environment more stable.

[0048] Specifically, the color camera 21 collects reflected light through the bandpass filter 25 to detect the fluorescent reaction of a specific material, thereby forming a captured image and identifying defects caused by chemical reactions or material aging.

[0049] Example 3

[0050] like Figures 1 to 6As shown, preferably, on the basis of Example 1, it also includes an information transmission module, a control module and a data processing module, the information transmission module is electrically connected to the control module, the control module is electrically connected to the data processing module, the information transmission module is also electrically connected to the data processing module, the control module controls the rotation of the first cross bar, the second cross bar, and controls the circuit box, and the data processing module is used to process the image data of the industrial camera.

[0051] Preferably, a turning rail 27 is provided in the extending direction of the slide rail 1 .

[0052] In this embodiment, the industrial camera includes a photosensitive camera 17 and a color camera 21. The information transmission module connects the photosensitive camera 17 and the color camera 21, transmits the captured image information to the data processing module, and connects the control module to interact with the steering rail 27.

[0053] Specifically, the information transmission module receives the circuit board image information output by the photosensitive camera 17 and the color camera 21, and the data processing module compares the image information with the standard circuit board image information. When it is determined that there is a defect in the image information, the information transmission module drives the control module to move the circuit board toward the steering rail 27 and determines it as a defective product. The circuit board without defects continues to move along the slide rail 1, thereby realizing automatic diversion of the detection results.

[0054] Specifically, when one side of the circuit board is detected to be free of defects by the infrared thermal imaging detection module 12 and the ultraviolet light detection module 13, the information transmission module and the control module drive the first cross bar 8 and the second cross bar 9 to rotate to realize the diagonal flipping of the circuit board. The other side of the circuit board is then detected by the ultraviolet light detection module 12 and the infrared thermal imaging detection module 13 to realize the multimodal online image acquisition and detection function of circuit board defects.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A multimodal online image acquisition system for detecting circuit board defects, characterized in that: The cam is an angular channel formed between a pair of camshafts and a pair of camshafts, and the camshafts are connected in a direction parallel to the axis of the first telescopic tube and a first end of the telescopic tube is connected to the camshaft.

2. A multimodal online image acquisition system for detecting circuit board defects according to claim 1, characterized in that: The second clamping block is L-shaped and is made of high temperature resistant material.

3. The multimodal online image acquisition system for detecting circuit board defects according to claim 1, characterized in that: The infrared thermal imaging detection module includes a first box body, which is mounted on the slide rail. Each inner wall of the first box body is paved with an infrared light diffuse reflection film. A height adjustment frame is arranged on the top inner surface of the first box body. The height adjustment frame is vertical to the slide rail, and at least two photosensitive cameras are arranged on the height adjustment frame.

4. The multimodal online image acquisition system for detecting circuit board defects according to claim 1, characterized in that: The ultraviolet light detection module includes a second box body, which is mounted on the slide rail. Each surface of the inner wall of the second box body is paved with an ultraviolet light diffuse reflection film. A lifting device is provided on the top surface of the second box body, and the lifting device is perpendicular to the slide rail. Color cameras are provided at both ends of the lifting device in the length direction. A light source element is provided on the lifting device, and the light source element includes an ultraviolet lamp. An ultraviolet reflective cover is provided on the outer cover of the ultraviolet lamp. The side of the ultraviolet reflective cover facing the slide rail is a filter plate, and the ultraviolet lamp projects the light source in the direction of the filter plate.

5. The multimodal online image acquisition system for detecting circuit board defects according to claim 4, characterized in that: A bandpass filter is arranged on the color camera lens, and the color camera is a first industrial RGB color camera.

6. The multimodal online image acquisition system for detecting circuit board defects according to claim 4, characterized in that: The ultraviolet reflective cover is in a semicircular arc shape.

7. The multimodal online image acquisition system for detecting circuit board defects according to claim 4, characterized in that: The second box body is provided with blackout curtains at the front and rear sides along the slide rail.

8. The multimodal online image acquisition system for detecting circuit board defects according to claim 1, characterized in that: It also includes an information transmission module, a control module and a data processing module. The information transmission module is electrically connected to the control module, the control module is electrically connected to the data processing module, and the information transmission module is also electrically connected to the data processing module. The control module controls the rotation of the first cross bar and the second cross bar, and controls the circuit box. The data processing module is used to process image data of the industrial camera.

9. The multimodal online image acquisition system for detecting circuit board defects according to claim 1, characterized in that: A steering rail is provided in the extending direction of the slide rail.

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