A device for lce liquid crystal elastomer defect detection

Abstract

The utility model discloses a kind of for lce liquid crystal elastomer defect detection device, specifically related to liquid crystal elastomer defect detection field, including detection shell, be provided with chute in detection shell, slidingly connected with door panel on chute, fixedly connected with placing table and mounting bracket in detection shell, linear motion assembly is installed on mounting bracket, the output end of linear motion assembly is connected with sliding block, linear motion assembly is used to drive sliding block to move along preset direction, rotating assembly is installed on sliding block, the output end of rotating assembly is connected with two symmetrical rotating frame, rotating frame is rotatably connected on sliding block, rotating assembly is used to drive rotating frame to rotate.The utility model is cooperated with the structure of main camera and the double auxiliary camera of multiple degrees of freedom, not only realizes the no dead angle detection to complex shape LCE sample, also significantly enhances the identification and judgment ability to subtle scratch, hidden bubble and other difficult defect, to ensure high efficiency and high accuracy of result in overall consideration of detection process.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal elastomer defect detection technology, and more specifically, to a device for detecting defects in LCE liquid crystal elastomers. Background Technology

[0002] The LCE liquid crystal elastomer defect detection device is a precision device specifically designed to detect surface and internal defects in liquid crystal elastomer materials. Its core function is to accurately identify defects such as cracks, bubbles, foreign matter, and structural inhomogeneities in materials through high-resolution optical imaging and intelligent algorithms. It plays a key role in the production, research and development, and quality control of liquid crystal elastomers, and can significantly improve the consistency and reliability of material performance, avoiding actuation failure or mechanical performance degradation caused by minor defects.

[0003] In traditional LCE (liquid crystal elastomer) defect detection, the detection device is usually equipped with only one fixed camera, which is strictly limited to two-dimensional plane imaging in the vertical direction. For edge curved surfaces, inclined surfaces or microstructure areas, a single orthogonal viewing angle cannot capture the true morphology of their lateral and undercut areas. When the manifestation of defects largely depends on the observation angle, the imaging under the vertical viewing angle will lose key information due to the interaction between the light reflection characteristics and surface geometric features. This inherent detection blind spot directly leads to a significant decrease in the defect recognition rate. Especially for LCE materials used in high-precision applications, any undetected micro-defects may become hidden dangers for the product to experience actuation failure or performance degradation under actual working conditions, which seriously restricts the reliability and consistency of product quality.

[0004] In summary, in order to more comprehensively detect defects in LCE liquid crystal elastomers, it is necessary to address the problem that traditional defect detection devices have a single and fixed detection angle, resulting in low detection rates for defects such as scratches and sidewall bubbles on inclined surfaces and obvious detection blind spots. The goal is to enable the detection device to perform detection without blind spots, while balancing detection efficiency and accuracy. Utility Model Content

[0005] The present invention provides a defect detection device for liquid crystal elastomers. The problem to be solved is that traditional defect detection devices have a single and fixed detection angle, resulting in a low detection rate for defects such as scratches on inclined surfaces and sidewall bubbles, and there is a significant detection blind zone.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a defect detection device for LC liquid crystal elastomers, comprising a detection housing, a sliding groove on the detection housing, a door panel slidably connected to the sliding groove, a placement platform and a mounting frame fixedly connected inside the detection housing, a linear motion component mounted on the mounting frame, a slider connected to the output end of the linear motion component, the linear motion component driving the slider to move along a preset direction, a rotation component mounted on the slider, two symmetrical rotation frames connected to the output end of the rotation component, the rotation frames rotatably connected to the slider, the rotation component driving the rotation frames to rotate, a main camera fixedly connected to the bottom of the slider, a third motor fixedly connected to the rotation frame, a rotating block fixedly connected to the output end of the third motor, the rotating block and the rotation frame rotatably connected, and an auxiliary camera fixedly connected to the rotating block.

[0007] In a preferred embodiment, the linear motion assembly includes a first motor fixedly connected to a mounting frame, a first synchronous pulley fixedly connected to the output end of the first motor via a shaft, a belt with one end sleeved on the first synchronous pulley, a second synchronous pulley sleeved on the other end of the belt, a slide rail fixedly connected to the mounting frame, and a threaded rod rotatably connected to the slide rail. The threaded rod and the second synchronous pulley are fixedly connected, the threaded rod and the slider are threadedly connected, and the slider and the slide rail are slidably connected. The first motor is used to drive the first synchronous pulley to rotate.

[0008] In a preferred embodiment, the rotating assembly includes a second motor fixedly connected to the slider, a first gear fixedly connected to the output end of the second motor via a shaft, and two second gears symmetrically meshing on both sides of the first gear. Both the first gear and the second gear are rotatably connected inside the slider. The second gear is fixedly connected to the rotating frame, and the second motor is used to drive the first gear to rotate.

[0009] In a preferred embodiment, two symmetrical electric push rods are fixedly connected to both sides of the detection housing. The output end of the electric push rod is fixedly connected to a slide, and several side lights are fixedly connected to the slide.

[0010] In a preferred embodiment, two symmetrical guide rods are slidably connected to both sides of the carriage, and the guide rods are fixedly connected to the detection housing. Several top lights are fixedly connected to the top of the detection housing.

[0011] In a preferred embodiment, a plurality of backlights are fixedly connected inside the placement platform, and a light-transmitting sealing plate is provided above the backlights, with the light-transmitting sealing plate and the placement platform being fixedly connected.

[0012] In a preferred embodiment, a plurality of adsorption holes are provided on the placement stage, and a vacuum pump is fixedly connected to the detection housing. The output end of the vacuum pump is connected to the placement stage through a pipe.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. This utility model, through the structure of the main camera and the dual auxiliary cameras with multiple degrees of freedom working together, not only achieves blind spot detection of complex-shaped LCE samples, effectively eliminating the detection blind spots of traditional single cameras, but also significantly enhances the ability to identify and judge difficult defects such as fine scratches and hidden bubbles through multi-view image comparison and verification, thus taking into account both the high efficiency of the detection process and the high accuracy of the results.

[0015] 2. This utility model constructs a three-dimensional lighting system that integrates a top light, a liftable side light, and a back light, achieving precise matching between lighting conditions and defect characteristics. This ensures that every inspection is conducted in an optimal and stable light field environment, avoiding misjudgments and omissions caused by light fluctuations, and guaranteeing a high degree of consistency and reliability of the inspection results. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the slider structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the rotating frame structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the rotating component structure of this utility model.

[0021] The attached figures are labeled as follows: 1. Detection housing; 101. Slide groove; 2. Door panel; 3. Placement platform; 301. Adsorption hole; 4. Mounting frame; 501. First motor; 502. First synchronous pulley; 503. Belt; 504. Second synchronous pulley; 505. Slide rail; 506. Threaded rod; 6. Slider; 701. Second motor; 702. First gear; 703. Second gear; 8. Rotating frame; 9. Main camera; 10. Third motor; 11. Rotating block; 12. Auxiliary camera; 13. Electric push rod; 14. Slide carriage; 15. Side light; 16. Guide rod; 17. Top light; 18. Back light; 19. Translucent sealing plate; 20. Vacuum pump. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] Liquid crystal elastomers (LCEs) are multiphase systems composed of ordered liquid crystal units and cross-linked polymer networks. This unique structure endows the material with anisotropic mechanical properties and stimulus-response behavior. During the preparation process, the alignment and orientation of the liquid crystal units need to be achieved through precisely controlled process conditions. However, it is precisely this complex multilevel structure that makes LCE materials extremely sensitive to various disturbances during the preparation process.

[0024] From a materials science perspective, the defects that may exist in LCEs mainly include the following categories: First, microscale cracks and voids, which usually originate from volume shrinkage or uneven solvent evaporation during the polymerization process; second, the inhomogeneity of the liquid crystal domain structure, including orientation misalignment, grain boundary defects, and local phase separation; third, the introduction of foreign impurities and bubbles, which may come from raw materials or the process environment; and finally, surface and interface irregularities, such as scratches, depressions, and warping. The presence of these defects not only affects the mechanical strength and fatigue life of the material, but also significantly alters its stimulus-response characteristics.

[0025] Therefore, LCE liquid crystal elastomer defect detection devices, as precision equipment specifically designed for detecting surface and internal defects in materials, play an indispensable role in material research and development, process optimization, and quality control. The core function of such devices is to accurately locate and classify various defects in materials through high-resolution optical imaging systems and advanced intelligent recognition algorithms, providing key data support for material performance evaluation and process improvement. An efficient defect detection system can significantly improve the consistency and reliability of LCE material products, effectively avoid actuation failure or mechanical performance degradation caused by minor defects, and thus ensure the stable performance of the final product in practical applications.

[0026] Currently, in the field of LCE material production and research, traditional defect detection devices are mainly based on machine vision technology. Their basic components include an imaging system, an illumination system, and an image processing unit. These devices typically use a fixed single-camera configuration, combined with a uniformly illuminated light source, to acquire two-dimensional images of the sample from a vertical direction.

[0027] Ideally, this configuration can effectively identify macroscopic defects located on the front side of the sample surface. The digital images captured by the camera are analyzed by specialized image processing algorithms, including filtering, edge detection, feature extraction, and classification recognition. Finally, the size, location, and type information of the defects are output. This technical approach can indeed provide a certain detection capability when inspecting LCE thin film samples with flat surfaces and simple structures.

[0028] However, in traditional LCE (liquid crystal elastomer) defect detection, the detection device is usually equipped with only one fixed camera, which is strictly limited to shooting in a two-dimensional plane in the vertical direction. This configuration is obviously unsuitable when dealing with LCE samples with complex morphology.

[0029] First, for curved edges, inclined surfaces, or microstructures, a single orthogonal perspective cannot capture the true morphology of their lateral and undercut regions. In practical applications, LCE materials are often processed into various complex shapes. Key defects may also be distributed on the sidewalls and inclined surfaces of these three-dimensional structures. However, at the angle of vertical shooting, these areas cannot be accurately observed due to geometric occlusion or imaging perspective distortion.

[0030] Secondly, the visual manifestation of many types of defects is strongly dependent on the observation angle. For example, when light is incident at a specific angle, the edge of the scratch will form a significant contrast due to light scattering. However, at a vertical viewing angle, this optical effect may disappear completely. Similarly, for LCE materials with a certain degree of transparency, the observation of internal bubbles and inclusions also requires multi-angle imaging to obtain their three-dimensional distribution information.

[0031] Another key issue is the neglect of the interaction between light reflection characteristics and surface geometry by traditional devices. LCE material surfaces often have specific roughness and gloss, and the interaction between these surface characteristics and incident light determines the final imaging effect. Under fixed lighting and single viewing angle conditions, certain types of defects can be masked or enhanced due to surface reflection characteristics, leading to misjudgment of detection results.

[0032] Furthermore, traditional lighting systems typically use light sources with fixed positions and angles, which cannot be adaptively adjusted according to sample characteristics and defect types. This rigid lighting scheme is difficult to cope with the diverse surface properties of LCE materials, especially for liquid crystal elastomers with anisotropic optical properties. Fixed lighting conditions may only be sensitive to defects with specific orientations and cannot fully cover all types of defects. For LCE materials used in high-precision applications, any undetected micro-defects may become a hidden danger for actuation failure or performance degradation of the product under actual working conditions.

[0033] From the perspective of product quality control, the limitations of traditional testing devices severely restrict the consistency and reliability of LCE products. Because the test results are affected by various factors such as sample placement, ambient light and surface condition, the test data between different batches, or even different samples in the same batch, may lack comparability. This uncertainty makes process optimization and quality traceability difficult, hindering the industrialization process and large-scale production of LCE materials.

[0034] More importantly, as LCE materials are applied more extensively in critical fields, the requirements for material reliability are increasing. LCE components used in aerospace, precision medicine, and safety-critical systems must have extremely high defect tolerance and long-term stability. Traditional testing methods cannot meet the stringent quality control requirements of these high-end applications, becoming a technical bottleneck restricting the development of LCE technology into high-end fields.

[0035] From an economic perspective, defective products flowing into downstream applications could lead to huge recall costs, reputational damage, and even legal liabilities. For L-materials, inaccurate defect statistics can also mislead the direction of process optimization, prolong the R&D cycle, and increase innovation costs.

[0036] In summary, traditional LCE defect detection devices, due to their inherent technical limitations, can no longer meet the quality control requirements of modern LCE material research and application. These devices have significant shortcomings in detecting complex three-dimensional structures, identifying viewpoint-dependent defects, and ensuring the consistency of detection results, which directly affects the reliability and safety of LCE products and restricts the application expansion of this advanced material in high-end fields. Faced with the new demands of the rapid development of LCE technology, the innovation of defect detection technology has become a key issue that the industry urgently needs to address.

[0037] Refer to the instruction manual appendix Figures 1 to 5 A defect detection device for liquid crystal elastomers includes a detection housing 1, a sliding groove 101 on the detection housing 1, a door panel 2 slidably connected to the sliding groove 101, a placement platform 3 and a mounting frame 4 fixedly connected inside the detection housing 1, a linear motion component mounted on the mounting frame 4, a slider 6 connected to the output end of the linear motion component, the linear motion component driving the slider 6 to move along a preset direction, a rotation component mounted on the slider 6, two symmetrical rotation frames 8 connected to the output end of the rotation component, the rotation frames 8 rotatably connected to the slider 6, the rotation component driving the rotation frames 8 to rotate, a main camera 9 fixedly connected to the bottom of the slider 6, a third motor 10 fixedly connected to the rotation frame 8, a rotating block 11 fixedly connected to the output end of the third motor 10, the rotating block 11 and the rotation frame 8 rotatably connected, and an auxiliary camera 12 fixedly connected to the rotating block 11.

[0038] It should be noted that the detection housing 1 constitutes a closed detection chamber, providing a stable and controllable lighting environment for detection, avoiding interference from external stray light, and ensuring the consistency of image acquisition. The placement stage 3 is located at the bottom inside the detection housing 1 and is used to support and fix the LCE liquid crystal elastomer sample to be tested. The main camera 9 is responsible for orthophoto scanning of the sample surface, a large-scale global scan, and preliminary defect identification. The two auxiliary cameras 12 perform multi-angle, close-up fine verification of suspected areas found by the main camera 9 or areas with blind spots in the field of view of the main camera 9 (such as edges, uneven surfaces), thereby effectively detecting various defects that appear due to different lighting angles.

[0039] It is worth noting that the linear motion component spans above the placement stage 3, driving the slider 6 to move along the length of the sample placement stage 3, enabling the camera system to scan the entire length of the sample. At the same time, the rotation component drives two rotating frames 8 to rotate simultaneously and symmetrically. Their rotation axes are usually perpendicular to the direction of motion of the linear motion component, and the third motor 10 on the rotating frame 8 drives the rotating block 11 to rotate relative to the rotating frame 8. This rotation axis intersects spatially with the aforementioned rotation axis of the rotating frame 8, enabling the auxiliary camera 12 to align with specific positions of the sample from different angles such as above and below the side.

[0040] Refer to the instruction manual appendix Figure 3 and Figure 4 The linear motion assembly includes a first motor 501 fixedly connected to the mounting frame 4, a first synchronous pulley 502 fixedly connected to the output end of the first motor 501 via a shaft, a belt 503 with one end sleeved on the first synchronous pulley 502, a second synchronous pulley 504 sleeved on the other end of the belt 503, a slide rail 505 fixedly connected to the mounting frame 4, and a threaded rod 506 rotatably connected to the slide rail 505. The threaded rod 506 and the second synchronous pulley 504 are fixedly connected. The threaded rod 506 and the slider 6 are threadedly connected. The slider 6 and the slide rail 505 are slidably connected. The first motor 501 is used to drive the first synchronous pulley 502 to rotate.

[0041] It should be noted that the first motor 501 is mounted on the top of the mounting bracket 4, and drives the threaded rod 506 to rotate on the slide rail 505 through the first synchronous pulley 502, belt 503 and second synchronous pulley 504. The slider 6 has a threaded hole in the center, which converts the rotational motion of the threaded rod 506 into the linear motion of the slider 6. There is a sufficiently large friction between the first synchronous pulley 502, belt 503 and second synchronous pulley 504 to achieve stable power transmission.

[0042] Refer to the instruction manual appendix Figure 5The rotating assembly includes a second motor 701 fixedly connected to the slider 6, a first gear 702 fixedly connected to the output end of the second motor 701 via a shaft, and two second gears 703 symmetrically meshing on both sides of the first gear 702. The first gear 702 and the second gear 703 are both rotatably connected inside the slider 6. The second gear 703 is fixedly connected to the rotating frame 8. The second motor 701 is used to drive the first gear 702 to rotate.

[0043] It should be noted that the second motor 701, as the power source, is a miniaturized servo motor, which is mounted on the slider 6. The synchronous rotation of the two rotating frames 8 is achieved through the first gear 702 and two symmetrical second gears 703.

[0044] It is worth noting that, since the two second gears 703 mesh with the middle first gear 702 simultaneously, according to the gear transmission principle, the rotation directions of the two second gears 703 are always opposite. When the second motor 701 drives the first gear 702 to rotate clockwise, one second gear 703 rotates counterclockwise, while the other rotates clockwise, thereby driving the two rotating frames 8 to rotate inward and outward respectively. At the same time, the two second gears 703 are exactly the same size and model, and have the same number of teeth and module as the first gear 702. Therefore, whatever degree the first gear 702 rotates, the two second gears 703 will precisely rotate in opposite directions by the same angle, ensuring that the rotation angles of the two rotating frames 8 are absolutely synchronized.

[0045] Refer to the instruction manual appendix Figure 2 The detection housing 1 has two symmetrical electric push rods 13 fixedly connected to both sides. The output end of the electric push rod 13 is fixedly connected to a slide 14, and several side lights 15 are fixedly connected to the slide 14.

[0046] It should be noted that the telescopic drive of the electric push rod 13 drives the slide 14 to move up and down, thereby changing the illumination height of the side lamp 15 and precisely controlling the angle between the light and the sample surface. This is crucial for highlighting micro-defects on the surface (such as scratches, pits, bumps, and orange peel texture). When the light shines at a specific angle, these defects will form obvious light and dark contrasts due to light scattering or blocking, which will then be captured by the camera.

[0047] Refer to the instruction manual appendix Figure 1 and Figure 3 The slide 14 has two symmetrical guide rods 16 slidably connected on both sides. The guide rods 16 are fixedly connected to the detection housing 1. Several top lights 17 are fixedly connected to the top of the detection housing 1.

[0048] It should be noted that the guide rod 16 and the electric push rod 13 are arranged in parallel to form a stable double-pillar guide mechanism, which ensures that the carriage 14 has only vertical freedom during the lifting process and will not sway back and forth or left and right, thereby maintaining the accuracy and consistency of the lighting angle, and avoiding damage to the electric push rod 13 due to the carriage 14 getting stuck.

[0049] Refer to the instruction manual appendix Figure 2 Several backlights 18 are fixedly connected inside the placement platform 3. A light-transmitting sealing plate 19 is provided above the backlights 18 and is fixedly connected to the placement platform 3.

[0050] It should be noted that the light emitted by the backlight 18 passes upward through the light-transmitting sealing plate 19, making the sample placed on the plate appear as a silhouette. The camera takes pictures from above, which can accurately measure the sample's shape and size and whether the outline is complete. At the same time, the light-transmitting sealing plate 19 can prevent dust, liquids, etc. from falling into the placement stage 3 and damaging the backlight 18 without affecting the illumination.

[0051] Refer to the instruction manual appendix Figure 2 The placement platform 3 has several adsorption holes 301. A vacuum pump 20 is fixedly connected to the detection housing 1. The output end of the vacuum pump 20 is connected to the placement platform 3 through a pipe.

[0052] It should be noted that the output pipe of the vacuum pump 20 is connected to the placement stage 3 and the light-transmitting sealing plate 19. When the vacuum pump 20 is started, it begins to draw air from the internal air passage of the placement stage 3. The pressure in the space below drops sharply due to the air being drawn, and the atmospheric pressure then presses the sample tightly against the surface of the placement stage 3, thus completing the fixation.

[0053] Working principle: The LCE sample to be tested is placed on the placement stage 3. The vacuum pump 20 is started, and the air inside the placement stage 3 is evacuated through the pipeline, creating a negative pressure in the adsorption holes 301 on the stage surface. Under atmospheric pressure, the LCE sample to be tested is pressed flat and firmly onto the placement stage 3 for fixation. Subsequently, the lighting system is activated. The top lamp 17 provides vertical front light, and the back lamp 18 provides backlight by transmitting light upward through the light-transmitting sealing plate 19. The electric push rod 13 drives the slide 14 to precisely rise and fall along the guide rod 16 to adjust the illumination angle of the side lamps 15, creating optimal lighting conditions for the manifestation of different defects. During testing, the first motor 501 drives the first synchronous pulley 502 to rotate, and the power is transmitted to the second synchronous pulley 504 through the belt 503. The screw rod 506 rotates, driving the slider 6 to move linearly along the slide rail 505 on the mounting frame 4, so that the main camera 9 fixed at its bottom can scan the sample over a wide area. When a suspected defect is found or multi-angle verification is required, the second motor 701 starts, driving the first gear 702 to rotate, which drives the two symmetrical second gears 703 to rotate synchronously in opposite directions, thereby adjusting the unfolding angle of the two rotating frames 8. Then the third motor 10 on the rotating frame 8 works, driving the rotating block 11 to rotate, and finally precisely adjusting the pitch angle of the auxiliary camera 12 fixed on it, so as to achieve fine, multi-angle shooting of a specific area. The entire detection process is carried out in a closed environment formed by the detection housing 1, and the sample is picked up and put down through the sliding door panel 2.

[0054] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A device for detecting defects in liquid crystal elastomers (LCEs), characterized in that: The device includes a detection housing (1), a sliding groove (101) on the detection housing (1), a door panel (2) slidably connected to the sliding groove (101), a placement platform (3) and a mounting frame (4) fixedly connected inside the detection housing (1), a linear motion component installed on the mounting frame (4), a slider (6) connected to the output end of the linear motion component, the linear motion component is used to drive the slider (6) to move along a preset direction, a rotating component installed on the slider (6), two symmetrical rotating frames (8) connected to the output end of the rotating component, the rotating frames (8) rotatably connected to the slider (6), the rotating component is used to drive the rotating frames (8) to rotate, a main camera (9) fixedly connected to the bottom of the slider (6), a third motor (10) fixedly connected to the rotating frame (8), a rotating block (11) fixedly connected to the output end of the third motor (10), the rotating block (11) and the rotating frame (8) rotatably connected, and an auxiliary camera (12) fixedly connected to the rotating block (11).

2. The device for detecting defects in LCE liquid crystal elastomers according to claim 1, characterized in that: The linear motion assembly includes a first motor (501) fixedly connected to the mounting bracket (4), a first synchronous pulley (502) fixedly connected to the output end of the first motor (501) via a shaft, a belt (503) with one end sleeved on the first synchronous pulley (502), a second synchronous pulley (504) sleeved on the other end of the belt (503), a slide rail (505) fixedly connected to the mounting bracket (4), and a threaded rod (506) rotatably connected to the slide rail (505). The threaded rod (506) is fixedly connected to the second synchronous pulley (504), the threaded rod (506) is threadedly connected to the slider (6), and the slider (6) is slidably connected to the slide rail (505). The first motor (501) is used to drive the first synchronous pulley (502) to rotate.

3. The device for detecting defects in LCE liquid crystal elastomers according to claim 1, characterized in that: The rotating assembly includes a second motor (701) fixedly connected to the slider (6), a first gear (702) fixedly connected to the output end of the second motor (701) via a shaft, and two second gears (703) symmetrically meshed on both sides of the first gear (702). The first gear (702) and the second gear (703) are both rotatably connected inside the slider (6). The second gear (703) is fixedly connected to the rotating frame (8). The second motor (701) is used to drive the first gear (702) to rotate.

4. The device for detecting defects in LCE liquid crystal elastomers according to claim 1, characterized in that: Two symmetrical electric push rods (13) are fixedly connected to both sides of the detection housing (1). The output end of the electric push rod (13) is fixedly connected to a slide (14), and several side lights (15) are fixedly connected to the slide (14).

5. The device for detecting defects in LCe liquid crystal elastomers according to claim 4, characterized in that: The slide (14) has two symmetrical guide rods (16) slidably connected on both sides. The guide rods (16) are fixedly connected to the detection housing (1). Several top lights (17) are fixedly connected to the top of the detection housing (1).

6. The device for detecting defects in LCE liquid crystal elastomers according to claim 1, characterized in that: Several backlights (18) are fixedly connected inside the placement platform (3). A light-transmitting sealing plate (19) is set above the backlights (18). The light-transmitting sealing plate (19) is fixedly connected to the placement platform (3).

7. The device for detecting defects in LCE liquid crystal elastomers according to claim 1, characterized in that: The placement platform (3) has several adsorption holes (301), and a vacuum pump (20) is fixedly connected to the detection housing (1). The output end of the vacuum pump (20) is connected to the placement platform (3) through a pipe.

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