Hydrophobicity testing device

Abstract

The utility model relates to the technical field of hydrophobicity testing, in particular to a hydrophobicity testing device which comprises a weep pipe, a camera and a testing board used for placing a PCB, the weep pipe is connected with a z-axis driving mechanism, the z-axis driving mechanism is connected with an x-axis driving mechanism and a y-axis driving mechanism, and the x-axis driving mechanism and the y-axis driving mechanism are connected with the camera. The weeping pipe is driven by the x-axis driving mechanism, the y-axis driving mechanism and the z-axis driving mechanism to move in the x-axis direction, the y-axis direction and the z-axis direction. The test plate is connected with a turnover mechanism for driving the test plate to turn over, the weep pipe is located on one side of the test plate and the camera, the camera is arranged above the test plate, and the turnover angle of the test plate driven by the turnover mechanism is the same as the mounting angle of the camera. The optical axis of the camera is perpendicular to the surface of the turned test board. According to the invention, the hydrophobicity test of the PCB can be efficiently, accurately and simply and conveniently realized.

Description

Technical Field

[0001] This application relates to the technical field of hydrophobicity testing, and particularly to a hydrophobicity testing device. Background Art

[0002] With the wide application of electronic devices, the quality and reliability of printed circuit boards (PCBs) have become particularly important. PCB boards are widely used in various electronic devices, playing the roles of supporting electronic components and realizing electrical connections. In practical applications, PCB boards are often exposed to environments with moisture, rain, or corrosive substances. If the surface of the PCB board absorbs water, it will not only cause electrical short circuits and electrical failures, but also trigger corrosion of the metal parts, affecting the integrity of signal transmission. Therefore, it is particularly important to ensure that the PCB board has good hydrophobic properties to improve its stability and reliability in complex environments.

[0003] Currently, the hydrophobicity testing of PCB boards mainly relies on manual operation. Common methods include dropping water droplets on the surface of the PCB board and observing the diffusion situation and contact angle size of the water droplets to judge its hydrophobic properties. The above testing methods usually require manual control of the dripping position and water volume, and the results are evaluated by visual inspection or simple optical devices.

[0004] The existing technology has the following deficiencies in the hydrophobicity testing of PCB boards: the manual operation method is easily affected by human factors, resulting in unstable and poor repeatability of test results. In addition, the testing process is cumbersome and time-consuming, leading to low testing efficiency. Therefore, how to efficiently, accurately, and simply implement the hydrophobicity testing of PCB boards is a difficult problem currently faced. Utility Model Content

[0005] In order to be able to efficiently, accurately, and simply implement the hydrophobicity testing of PCB boards, this application provides a hydrophobicity testing device. This application provides the following technical solutions:

[0006] A hydrophobicity testing device includes a drip tube, a camera, and a test board for placing the PCB board. The drip tube is connected to a z-axis drive mechanism, and the z-axis drive mechanism is respectively connected to an x-axis drive mechanism and a y-axis drive mechanism. The drip tube moves along the x-axis direction, y-axis direction, and z-axis direction under the drive of the x-axis drive mechanism, the y-axis drive mechanism, and the z-axis drive mechanism respectively;

[0007] The test board is connected to a flipping mechanism that drives it to flip. The drip tube is located on one side of the test board and the camera. The camera is arranged above the test board. The angle at which the flipping mechanism drives the test board to flip is the same as the angle at which the camera is installed, and the optical axis of the camera is perpendicular to the surface of the test board after flipping.

[0008] In a specific possible implementation manner, a plurality of limit blocks are provided on a side of the test board close to the camera, and the limit blocks are respectively provided at four corners of the test board.

[0009] In a specific feasible implementation scheme, the flipping mechanism includes a fixed frame, a rotating table and a flipping motor arranged on the fixed frame, the fixed frame is arranged below the camera, the rotating table is rotatably arranged on the fixed frame, and the output end of the flipping motor passes through the fixed frame and is connected to the rotating table; a connecting plate is provided on the top surface of the rotating table, and the test plate is arranged on the top surface of the connecting plate.

[0010] In a specific possible implementation manner, the length and width of the connecting plate are both greater than the length and width of the test plate, and a drainage groove is provided on the top surface of the connecting plate located on the peripheral side of the test plate.

[0011] In a specific possible implementation manner, a light source is provided at one end of the camera close to the test board, the installation angle of the light source is the same as the installation angle of the camera, and the light source is a square light source.

[0012] In a specific possible implementation manner, the test board and its corresponding flipping mechanism are provided in a plurality of groups, and the plurality of groups of the flipping mechanisms are arranged in parallel below the camera.

[0013] In a specific possible implementation manner, the drip pipe is connected to a metering pump through a pipeline.

[0014] In a specific feasible implementation scheme, a mounting frame is provided on the z-axis driving mechanism, and a top plate and a bottom plate are provided at one end of the mounting frame away from the z-axis driving mechanism in parallel, the drip pipe is vertically and detachably arranged on the top plate, and a clearance groove is provided on the bottom plate, and the clearance groove is located directly below the drip pipe.

[0015] In summary, the beneficial effects of this application include at least:

[0016] 1) Traditional vacuum fixing methods may put pressure on the PCB, especially on thinner or more fragile PCBs, which may cause damage. The L-shaped limit block adopts a mechanical fixing method, which will not put unnecessary pressure on the PCB, thereby effectively protecting the PCB and avoiding damage.

[0017] 2) When the flip angle of the test board is the same as the camera installation angle (i.e. tilt angle), the optical axis of the camera is perpendicular to the flipped surface of the test board. This setting ensures that the camera can directly shoot the PCB surface from directly above, avoiding image deformation and distortion caused by angle deviation, thereby improving the accuracy of the captured image.

[0018] Place the PCB board on the test board. Subsequently, by controlling the x-axis drive mechanism, y-axis drive mechanism, and z-axis drive mechanism, drive the water dripping pipe to move above the test board for dripping water. After dripping, control the water dripping pipe to reset. Then control the flipping motor to drive the test board to rotate, control the camera to take pictures of the PCB board on the test board, and after taking pictures, control the flipping motor again to reset the test board, thereby completing the hydrophobicity test operation of the PCB board. Compared with manual operation, it can efficiently, accurately and simply realize the hydrophobicity test of the PCB board.

[0019] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly and implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present application and the accompanying drawings. Brief Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the overall structure of the hydrophobicity test device in this embodiment.

[0021] Figure 2 is Figure 1 an enlarged view of part A in

[0022] Figure 3 It is a schematic diagram of the overall structure of the hydrophobicity test device from another angle in this embodiment.

[0023] Figure 4 It is a schematic diagram of the structure of the flipping mechanism in this embodiment.

[0024] Reference numerals: 1, x-axis drive mechanism; 2, y-axis drive mechanism; 3, z-axis drive mechanism; 31, mounting frame; 32, top plate; 33, bottom plate; 34, relief groove; 4, water dripping pipe; 41, metering pump; 5, flipping mechanism; 51, fixed frame; 52, flipping motor; 53, rotating table; 54, test board; 541, limiting block; 542, drainage groove; 55, connecting plate; 6, gantry; 7, camera; 8, light source; 9, slide cylinder. Detailed Description of the Preferred Embodiments

[0025] The following combines the accompanying drawings and embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0026] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the specific embodiments of the present application in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. Additionally, it should be noted that for the convenience of description, only the parts related to the present application rather than all the structures are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0027] The terms "comprising" and "having" in the present application and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0028] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0029] An embodiment of the present application discloses a hydrophobicity testing device.

[0030] Referring to Figure 1 , the hydrophobicity testing device includes an x-axis driving mechanism 1, a y-axis driving mechanism 2, and a z-axis driving mechanism 3. The x-axis driving mechanism 1 is disposed on the y-axis driving mechanism 2, and the z-axis driving mechanism 3 is disposed on the x-axis driving mechanism 1. Optionally, in the embodiments of the present application, the x-axis driving mechanism 1, the y-axis driving mechanism 2, and the z-axis driving mechanism 3 are all slide table modules driven by motors. It should be noted that the x-axis driving mechanism 1, the y-axis driving mechanism 2, and the z-axis driving mechanism 3 in the embodiments of the present application are all well-known common knowledge in the art, so the present application will not describe them in detail. Referring to Figure 2 , a mounting frame 31 is fixedly connected to the slide table of the z-axis driving mechanism 3. The mounting frame 31 is horizontally arranged. One end of the mounting frame 31 away from the z-axis driving mechanism 3 is fixedly connected with a top plate 32 and a bottom plate 33. Both the top plate 32 and the bottom plate 33 are horizontally arranged and the top plate 32 is located above the bottom plate 33. A drip pipe 4 is vertically penetrated through the top plate 32. The drip pipe 4 is detachably connected to the top plate 32 through a nut. A relief groove 34 is formed on the bottom plate 33, and the relief groove 34 is located directly below the drip pipe 4.

[0031] Referring to Figure 1and Figure 2 The drip tube 4 is connected to a metering pump 41 through a pipeline. The metering pump 41 can accurately control the amount of dripping water to ensure that the volume of each drip is consistent, thereby improving the reliability and repeatability of the test results. The amount of dripping water of the drip tube 4 can be adjusted according to needs to adapt to different test requirements. In addition, the metering pump 41 can be integrated with an automatic control system to realize an automated dripping process, reduce manual intervention, and improve the test efficiency.

[0032] Refer to Figure 1 and Figure 2 In the implementation, through the settings of the x-axis drive mechanism 1, the y-axis drive mechanism 2, and the z-axis drive mechanism 3, the drip tube 4 can be driven to move in the x-axis direction, y-axis direction, and z-axis direction, so that the drip tube 4 can move to a specified area for the dripping test operation.

[0033] Refer to Figure 1 The hydrophobicity test device further includes a gantry 6 and a flipping mechanism 5 arranged below the gantry 6. The gantry 6 and the flipping mechanism 5 are arranged on one side of the y-axis drive mechanism 2. Combining Figure 3 At the top of the gantry 6, a camera 7 is fixedly installed. The camera 7 is inclined. At one end of the camera 7 close to the flipping mechanism 5, a light source 8 is arranged to be inclined at the same angle. The light source 8 is a square light source. The square light source can provide uniform illumination, reduce problems such as shadows and uneven brightness, thereby improving the quality and clarity of the captured images. At the same time, the square light source can cover a large illumination area and is suitable for application scenarios that require uniform illumination of the entire PCB board.

[0034] Refer to Figure 4, the flipping mechanism 5 includes a slide cylinder 9, a fixed frame 51, a rotating table 53 and a flipping motor 52. The slide cylinder 9 is fixedly installed below the camera 7. The fixed frame 51 is installed on the slide of the slide cylinder 9. The fixed frame 51 is integrally U-shaped. The rotating table 53 is rotatably arranged on the fixed frame 51. The flipping motor 52 is installed on the outer side wall of the fixed frame 51. The output end of the flipping motor 52 passes through the side wall of the fixed frame 51 and is fixedly connected to the rotating table 53. A connecting plate 55 is fixedly connected to the top surface of the rotating table 53, and a test board 54 is fixedly connected to the top surface of the connecting plate 55. The length and width of the connecting plate 55 are both greater than those of the test board 54. A drain groove 542 is provided in a circle on the top surface of the connecting plate 55 around the test board 54. The drain groove 542 can effectively guide the water droplets dripping on the PCB board to flow out, prevent the water droplets from accumulating on the surface of the test board 54, and avoid affecting subsequent tests or causing the test board 54 and the PCB board to be wet. Four limit blocks 541 are fixedly installed on the top surface of the test board 54. The limit blocks 541 are all L-shaped. The four limit blocks 541 are respectively arranged at the four corners of the top surface of the test board 54. During the test, the PCB board is placed on the test board 54 and is limited by the four corner limit blocks 541 to prevent the PCB board from shifting. The traditional vacuum suction fixing method may exert pressure on the PCB board, especially on thinner or more fragile PCB boards, which may cause damage. The L-shaped limit blocks 541 adopt a mechanical fixing method and will not apply unnecessary pressure to the PCB board, thus effectively protecting the PCB board and avoiding damage.

[0035] Refer to Figure 3 and Figure 4, the camera 7 is located above the test board 54. After starting the flipping motor 52, the rotating table 53 drives the test board 54 to flip. At this time, the flipping angle of the test board 54 is the same as the installation angle of the camera 7 (i.e., the tilting angle), and the optical axis of the camera 7 is perpendicular to the surface of the test board 54 after flipping. When the flipping angle of the test board 54 is the same as the installation angle of the camera 7 (i.e., the tilting angle), the optical axis of the camera 7 is perpendicular to the surface of the test board 54 after flipping. This setting ensures that the camera 7 can directly photograph the surface of the PCB board from directly above, avoiding image distortion and aberration caused by angular deviation, thereby improving the accuracy of the photographed image. In addition, since the optical axis of the camera 7 is perpendicular to the surface of the test board 54 after flipping, the square light source can evenly illuminate the surface of the PCB board, reducing shadows and bright spots, making the illumination of the test area more uniform and ensuring the quality and clarity of the photographed image. When water droplets fall on the PCB board, frontal photography may be interfered by the reflection on the surface of the water droplets, resulting in a decrease in image quality. By flipping the PCB board and then taking a photo, direct shooting of the reflected light can be avoided, and a clearer image can be obtained. In addition, taking a photo after flipping enables the camera 7 to directly observe the shape and distribution of the water droplets from the reverse side, which helps to more accurately analyze the hydrophobic performance of the PCB board. Frontal photography is easily interfered by the surface texture and structure of the PCB board, and more accurate detection results can be obtained after flipping.

[0036] Referring to Figure 3 and Figure 4 , there are two sets of the test board 54 and its corresponding flipping mechanism 5. The two sets of flipping mechanisms 5 are arranged in parallel under the gantry 6, and two cameras 7 on the gantry 6 are also correspondingly arranged. Multiple sets of test boards 54 and flipping mechanisms 5 can simultaneously perform hydrophobicity tests, significantly improving the test efficiency, meeting the test requirements for a large number of PCB boards, and reducing the waiting time for a single PCB board. At the same time, if one set of the test board 54 or the flipping mechanism 5 needs maintenance or adjustment, the other set can still continue to work, reducing the downtime of the equipment and improving the overall production efficiency.

[0037] In summary, when performing the hydrophobicity test on a PCB board, first place the PCB board on the test board 54. Subsequently, by controlling the x-axis driving mechanism 1, the y-axis driving mechanism 2, and the z-axis driving mechanism 3, drive the drip pipe 4 to move to directly above the test board 54 for dripping water. After dripping water, control the drip pipe 4 to reset. Subsequently, control the flipping motor 52 to drive the test board 54 to rotate, control the camera 7 to take a photo of the PCB board on the test board 54, and after taking the photo, control the flipping motor 52 again to make the test board 54 reset, thereby completing the hydrophobicity test operation of the PCB board. Compared with manual operation, it can efficiently, accurately, and simply implement the hydrophobicity test of the PCB board.

[0038] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A hydrophobicity testing device, characterized in that, It includes a dripping pipe, a camera and a test board for placing a PCB board, wherein the dripping pipe is connected to a z-axis driving mechanism, and the z-axis driving mechanism is respectively connected to an x-axis driving mechanism and a y-axis driving mechanism, and the dripping pipe moves along the x-axis direction, the y-axis direction and the z-axis direction under the drive of the x-axis driving mechanism, the y-axis driving mechanism and the z-axis driving mechanism respectively; The test board is connected to a flipping mechanism for driving it to flip, the dripping pipe is located on one side of the test board and the camera, the camera is arranged above the test board, the flipping angle of the test board driven by the flipping mechanism is the same as the angle at which the camera is installed, and the optical axis of the camera is perpendicular to the surface of the test board after flipping.

2. The hydrophobicity testing device according to claim 1, wherein A plurality of limit blocks are arranged on a side of the test board close to the camera, and the limit blocks are arranged at four corners of the test board respectively.

3. The hydrophobicity testing device according to claim 1, characterized in that, The flipping mechanism includes a fixed frame, a rotating table and a flipping motor arranged on the fixed frame, the fixed frame is arranged below the camera, the rotating table is rotatably arranged on the fixed frame, the output end of the flipping motor passes through the fixed frame and is connected to the rotating table; a connecting plate is provided on the top surface of the rotating table, and the test plate is arranged on the top surface of the connecting plate.

4. The hydrophobicity testing device according to claim 3, characterized in that, The length and width of the connecting plate are both greater than those of the testing plate, and a drainage groove is provided on the top surface of the connecting plate located on the peripheral side of the testing plate.

5. The hydrophobicity testing device according to claim 1, characterized in that, A light source is provided at one end of the camera close to the test board. The installation angle of the light source is the same as the installation angle of the camera, and the light source is a square light source.

6. The hydrophobicity testing device according to claim 1, characterized in that The test board and its corresponding turning mechanism are provided in several groups, and the several groups of turning mechanisms are arranged in parallel below the camera.

7. The hydrophobicity testing device according to claim 1, wherein, The dripping pipe is connected with a metering pump through a pipeline.

8. The hydrophobicity testing device according to claim 1, characterized in that, The z-axis driving mechanism is provided with a mounting frame, and one end of the mounting frame away from the z-axis driving mechanism is provided with a top plate and a bottom plate arranged in parallel, the drip pipe is vertically arranged and detachably arranged on the top plate, and the bottom plate is provided with a clearance groove, and the clearance groove is located directly below the drip pipe.

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