A scanning device for detecting surface defects of a magnetic film rubber

Abstract

The utility model discloses a scanning device for detecting magnetic film rubber surface defect relates to detection technical field, the scanning device of the utility model is before detection, and the magnetic film rubber is laid in the surface of standard block, after detection, drive motor drives push rod along linear guide and does uniform velocity linear motion, first bearing and second bearing on bearing assembly of test pressure plate both sides installation roll in the strip -shaped hole of the both sides of apron, drive test pressure plate and do uniform velocity linear motion, while reciprocating uniform velocity linear motion, the magnetic probe and processing unit module of installation on test pressure plate detect the defect of magnetic film rubber, namely the utility model under the condition that first bearing and second bearing roll, with the posture of stable drive test pressure plate reciprocating uniform velocity motion to make the magnetic probe and processing unit module accurate scanning the surface of magnetic film rubber, can accurate detection magnetic film rubber surface defect's specific position and defect parameter, to facilitate subsequent correction to magnetic film rubber.

Description

Technical Field

[0001] This utility model relates to the field of detection technology, and in particular to a scanning device for detecting defects on the surface of magnetic film rubber. Background Technology

[0002] Magnetic film rubber refers to the integration of magnetic thin films (such as nanoscale CoFeB and FePt thin films) on a rubber substrate to form a "magnetic film-rubber" composite system, which belongs to the innovative direction of flexible magnetic functional materials. Its preparation method is to deposit magnetic thin films with micron or even nanometer-thickness on a flexible rubber substrate (such as PDMS and silicone). Magnetic film rubber combines the high performance of magnetic thin films (such as high magnetic permeability and high coercivity) with the elasticity and stretchability of rubber, realizing intelligent characteristics such as magnetic field response deformation and flexible magnetoelectric coupling. Compared with traditional magnetic rubber, magnetic film rubber has higher magnetic properties because the magnetic film can be directionally magnetized. It is mainly used in flexible magnetoelectronic devices (such as stretchable magnetic sensors, adaptive antennas, etc.), biomedical engineering (eight-phase drug delivery system, biomimetic actuators, etc.), energy and environmental protection (magnetic-electric composite engines, intelligent adsorption materials, etc.).

[0003] In the preparation of magnetic film rubber, there are two main processes: magnetic thin film deposition + rubber bonding and direct flexible substrate deposition. Due to the high temperature during the preparation process, the bonding process between the magnetic film and the rubber interface needs optimization, resulting in uneven distribution of the magnetic film in the finished product, with defects such as protrusions, depressions, and cracks. This leads to magnetic degradation of the magnetic film and affects its performance. Therefore, surface defect detection of magnetic film rubber before use is very important. Currently, the detection methods for rubber surface defects mainly focus on three types: direct observation, non-destructive testing, and destructive testing. Direct observation relies on direct human observation to judge defects, which is prone to human error and misjudgment. Non-destructive testing methods mainly include microscopy, ultrasonic testing, and eddy current testing. Microscopy is greatly affected by environmental factors and has low efficiency. Ultrasonic testing has strong penetration and high resolution, but the equipment cost is high and the operation is complex. Eddy current testing has strong penetration, but the equipment cost is high, the size is large, the operation is complex, the detection items are limited, and the overall cost-effectiveness is low. Destructive testing involves sampling the sample surface, but it will damage the sample surface and is relatively slow.

[0004] Therefore, the three current detection methods—direct observation, non-destructive testing, and destructive testing—all suffer from low accuracy and are difficult to accurately detect surface defects in magnetic film rubber. Utility Model Content

[0005] This invention provides a scanning device for detecting surface defects of magnetic film rubber, which can solve the problem in the prior art that it is difficult to accurately detect surface defects of magnetic film rubber.

[0006] This utility model embodiment provides a scanning device for detecting defects on the surface of magnetic film rubber, including a base plate, a cover plate fixed on the top surface of the base plate, and strip-shaped holes respectively opened on both sides of the cover plate;

[0007] A linear guide rail is provided on one side of the base plate, and a drive motor is fixed to the other end of the linear guide rail. The output shaft of the drive motor meshes with the thread on the push rod through a gear. A test pressure plate is fixed to the other end of the push rod, and the push rod moves on the linear guide rail.

[0008] Multiple bearing assemblies are installed on both sides of the test plate, and the first bearing and the second bearing on each bearing assembly are respectively arranged in the strip-shaped hole opened in the cover plate. When the test plate moves, the first bearing and the second bearing can roll on the base plate.

[0009] The test plate is equipped with a magnetic probe and a processing unit module, which is used to detect defects on the surface of the magnetic film rubber.

[0010] Preferably, a standard block is provided on the top inner side of the cover plate, and the standard block can fix the magnetic film rubber to be tested on the surface of the standard block.

[0011] Preferably, two bearing assemblies are installed on each side of the test plate;

[0012] The two bearing assemblies on one side of the test plate are set inside the corresponding strip-shaped holes on one side of the cover plate, and when the test plate moves, the first bearing and the second bearing on the bearing assembly can roll along the trajectory of the strip-shaped holes on the base plate.

[0013] Preferably, the bearing assembly further includes a guide block and a threaded connecting rod;

[0014] The threaded connecting rod is fixed to the top of the guide block, and the first bearing and the second bearing are respectively disposed on both sides of the guide block.

[0015] Preferably, before the test plate begins to move, the pressure of the test plate on the magnetic film rubber is controlled by controlling the number of turns of the nut on the connecting rod.

[0016] Preferably, a displacement sensor is also installed on the test plate to control the movement distance of the test plate.

[0017] Preferably, a middle plate is also provided on the inner side of the bottom plate and the cover plate.

[0018] This utility model provides a scanning device for detecting defects on the surface of magnetic film rubber. Compared with the prior art, its advantages are as follows:

[0019] Before the detection begins, the scanning device of this invention lays the magnetic film rubber flat on the surface of the standard block. After the detection begins, the drive motor drives the push rod to move in a uniform linear motion along the linear guide rail. At this time, the first and second bearings on the bearing assemblies installed on both sides of the test plate roll in the strip holes on both sides of the cover plate, driving the test plate to move in a uniform linear motion. While reciprocating in a uniform linear motion, the magnetic probe and processing unit module installed on the test plate detect the defects of the magnetic film rubber. That is, under the condition that the first and second bearings are rolling, this invention drives the test plate to reciprocate in a stable posture, thereby enabling the magnetic probe and processing unit module to accurately scan the surface of the magnetic film rubber. It can accurately detect the specific location and defect parameters of the magnetic film rubber surface defects, so as to facilitate subsequent correction of the magnetic film rubber. Attached Figure Description

[0020] Figure 1 A schematic diagram illustrating the surface defects of a magnetic film rubber, provided as an embodiment of this utility model, for detecting surface defects of a magnetic film rubber.

[0021] Figure 2 A schematic diagram of the structure of a scanning device for detecting defects on the surface of a magnetic film rubber, provided for an embodiment of this utility model;

[0022] Figure 3 A schematic diagram of a bearing assembly for a scanning device used to detect defects on the surface of a magnetic film rubber, provided for an embodiment of this utility model;

[0023] Among them: 1. Magnetic film, 2. Rubber, 3. Depression defect, 4. Protrusion defect, 5. Scratch defect, 11. Cover plate, 12. Standard block, 13. Middle plate, 14. Base plate, 15. Test pressure plate, 16. Bearing assembly, 17. Push rod, 18. Linear guide rail, 19. Displacement sensor, 20. Drive motor, 21. First bearing, 22. Second bearing, 23. Guide block, 24. Connecting rod. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0030] See Figure 2 This utility model provides a scanning device for detecting surface defects of magnetic film rubber. It can quickly scan the entire plane (150*150mm) of the entire magnetic film rubber. Through a magnetic sensor, it can identify surface protrusions, depressions and scratches of the magnetic film rubber. At the same time, the magnetic film rubber surface defect detection scanning mechanism can realize the cyclic reciprocating motion of the magnetic sensor on the magnetic film surface, and quickly transmit the scanning results to the receiving port, so as to achieve the purpose of non-destructive detection of surface defects of the entire magnetic film rubber.

[0031] like Figure 1 As shown, this is a test sample of magnetic film rubber. It can be seen that the sample surface has defects such as pitting defect 3, protrusion defect 4, and scratch defect 5.

[0032] like Figure 2 The diagram shown is a structural diagram of the magnetic film rubber surface defect detection scanning mechanism proposed in this utility model, which includes a cover plate 11, a standard block 12, a middle plate 13, a bottom plate 14, a test pressure plate 15, a bearing assembly 16, a push rod 17, a linear guide rail 18, a displacement sensor 19, and a drive motor 20.

[0033] like Figure 3 The diagram shows the bearing assembly structure of the scanning device of this utility model. The bearing assembly 16 consists of a first bearing 21, a second bearing 22, a guide block 23, and a connecting rod 24. The function of the bearing assembly 16 is to change the sliding friction force into rolling friction, thereby reducing the dynamic friction force between the measured object and the cover plate 11. In addition, the connecting rod 24 is designed to be fully threaded. The pressure applied to the magnetic membrane surface is controlled by the rotation number of the nuts in the four bearing assemblies 16, which can also ensure that the pressure applied to the magnetic membrane surface is evenly distributed.

[0034] The working process of this utility model is as follows: The magnetic film rubber is laid flat on the surface of the standard block 12 and fixed to the surface of the standard block 12 with screws; multiple magnetic probes and processing unit modules are fixed in the test pressure plate 15, and a slight pressure is applied to the magnetic film rubber by means of the number of turns of the nuts in the four bearing assemblies 16. The displacement sensor 19 takes the positioning at the beginning as the initial position; when the detection begins, the drive motor 20 drives the push rod 17 to move in a uniform linear motion along the linear guide rail 18. The magnetic probe and processing unit module move in a uniform linear motion on the surface of the tested object. When a protrusion or depression appears on the surface of the magnetic film, the distance between the magnetic film and the detection base surface of the magnetic probe and processing unit will change. At this time, the magnetic probe senses the change in distance, the displacement sensor 19 outputs the defect position information, the processing unit module processes the degree of distance change and sends it to the upper computer imaging software, images the surface of the magnetic film and identifies the defect type, position and parameters through deep learning algorithm, and finally generates defect position information and defect parameters. Then, the magnetic film rubber can be processed according to the defect position information and defect parameters. The displacement sensor 19 is used to measure the location and size of the defect, and can also be replaced by a laser rangefinder.

[0035] Based on the unique characteristics of the magnetic film rubber bonding surface (weak bonding force, prone to delamination), this invention introduces a bearing assembly 16 on the moving surface of the testing platform to replace sliding with the rolling action of the bearing assembly, reducing friction and minimizing damage to the magnetic film layer. The structure of this invention combines a drive motor, a linear guide rail, and a displacement sensor, ensuring the scanning speed and scanning area of ​​the scanning mechanism, enabling precise detection of the specific location of defects on the magnetic film rubber surface. Simultaneously, the standard block design of the mechanism ensures absolute flatness during the testing process, preventing relative movement between the magnetic film rubber and the drive platform device during scanning, which would affect the testing results.

[0036] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A scanning device for detecting defects on the surface of a magnetic film rubber, characterized in that, include: A base plate (14) is provided with a cover plate (11) fixed on its top surface, and strip-shaped holes are provided on both sides of the cover plate (11); A linear guide rail (18) is provided on one side of the base plate, and a drive motor (20) is fixed at the other end of the linear guide rail (18). The output shaft of the drive motor (20) meshes with the thread on the push rod (17) through a gear. A test pressure plate (15) is fixed at the other end of the push rod (17), and the push rod (17) moves on the linear guide rail (18). Multiple bearing assemblies (16) are installed on both sides of the test plate (15), and the first bearing (21) and the second bearing (22) on each bearing assembly (16) are respectively arranged in the strip-shaped hole opened in the cover plate (11). When the test plate (15) moves, the first bearing (21) and the second bearing (22) can roll on the base plate (14). The test plate (15) is equipped with a magnetic probe and processing unit module, which is used to detect defects on the surface of the magnetic film rubber.

2. The scanning device for detecting defects on the surface of magnetic film rubber according to claim 1, characterized in that, A standard block (12) is provided on the inner side of the top of the cover plate (11), and the standard block (12) can fix the magnetic film rubber to be tested on the surface of the standard block (12).

3. The scanning device for detecting defects on the surface of magnetic film rubber according to claim 2, characterized in that, Two bearing assemblies (16) are installed on both sides of the test plate (15). Two bearing assemblies (16) on one side of the test plate (15) are set inside the corresponding strip-shaped holes on one side of the cover plate (11). When the test plate (15) moves, the first bearing (21) and the second bearing (22) on the bearing assembly (16) can roll along the trajectory of the strip-shaped holes on the base plate (14).

4. A scanning device for detecting defects on the surface of a magnetic film rubber according to claim 3, characterized in that, The bearing assembly (16) also includes a guide block (23) and a threaded connecting rod (24). The threaded connecting rod (24) is fixed to the top of the guide block (23), and the first bearing (21) and the second bearing (22) are respectively disposed on both sides of the guide block (23).

5. A scanning device for detecting defects on the surface of a magnetic film rubber according to claim 4, characterized in that, Before the test plate (15) starts moving, the pressure of the test plate (15) on the magnetic film rubber is controlled by controlling the number of turns of the nut on the connecting rod (24).

6. A scanning device for detecting defects on the surface of a magnetic film rubber according to claim 1, characterized in that, The test plate (15) is also equipped with a displacement sensor (19) to control the movement distance of the test plate (15).

7. A scanning device for detecting defects on the surface of a magnetic film rubber according to claim 1, characterized in that, A middle plate (13) is also provided on the inner side of the bottom plate (14) and the cover plate (11).

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