Beef freshness detection method and detection system

Abstract

The invention provides a beef freshness detection method and detection system, and relates to the technical field of optical identification detection, the detection system comprises a sample detection device and a detection platform, the sample detection device carries a visual identification assembly, a cleaning mechanism, a locking extension assembly and a lifting mechanism, a light source control system, a database, a feature extraction module and a prediction analysis module are further carried in the visual recognition assembly, a model is established in the detection platform, and side plates are welded to the two sides of the sample detection equipment. According to the method, the water content of the surface layers of different samples is highly consistent, the interference of wrinkles on the surface of the to-be-detected beef sample on the final result in the image acquisition process is avoided, the detection accuracy is improved, the pretreatment difficulty of the beef sample in the early stage is reduced, and the whole detection process is highly standardized and unified.

Description

Technical Field

[0001] The invention relates to the technical field of optical recognition detection, and in particular to a beef freshness detection method and detection system. Background Art

[0002] The main purpose of beef freshness testing is to ensure food safety, protect consumer health, ensure food quality and promote sustainable development of the food industry. By testing the freshness of beef, beef that does not meet safety standards can be discovered and handled in a timely manner to prevent it from entering the market, thereby protecting consumer health. After freshness testing, the quality changes of beef during storage and processing can be effectively evaluated to ensure that the beef remains in good quality when it reaches consumers.

[0003] The existing technology for detecting the freshness of beef includes color observation, odor identification, and meat elasticity detection, but such solutions mainly rely on the experience of the testers themselves, lack effective and unified standards, and the detection accuracy is insufficient. In the existing solution, the sample to be tested can also be identified and judged by a chromatograph or a visual recognition system. This solution has high accuracy, but during conventional visual recognition, changes in the water content on the surface of the sample will also cause changes in the color parameters of the collected image, thereby affecting the final test results. It is still difficult to achieve the requirement of highly consistent surface water content of different samples only by manual washing and drying. In addition, wrinkles and squeezing of beef samples during the measurement process will also reduce the reliability and accuracy of subsequent measurements. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a beef freshness detection method and detection system to solve the problems raised in the above-mentioned background technology. The present invention can automatically stretch and tension the beef sample to be tested, and after rinsing, provide an equivalent drying treatment to ensure that the surface water content of different samples is highly consistent. At the same time, it also avoids the interference of wrinkles on the surface of the beef sample to be tested on the final result during the image acquisition process, thereby improving the accuracy of the detection and reducing the difficulty of pre-treatment of the beef sample in the early stage. The entire detection process is highly standardized and unified.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a beef freshness detection system, the detection system includes a sample detection device and a detection platform, the sample detection device is equipped with a visual recognition component, a cleaning mechanism, a locking and extending component and a lifting mechanism, and the visual recognition component is also equipped with a light source control system, and a database, a feature extraction module and a prediction analysis module of the model are established in the detection platform, side panels are welded on both sides of the sample detection device, a detection platform is welded on the top of the side panel, a bottom plate is welded on the inner side of the side panel, a support frame is welded on the surface of the detection platform, a cleaning mechanism is inserted in the middle of the detection platform, the visual recognition component passes through the inside of the cleaning mechanism, and an image acquisition unit is screwed on the top of the visual recognition component, a locking and extending component is inserted at the bottom of the detection platform, and a plug-in rod is installed at the end of the locking and extending component, a lifting mechanism is screwed on the surface of the bottom plate, and the locking and extending component is embedded in the surface of the lifting mechanism through the plug-in rod at the end.

[0006] Furthermore, the lifting mechanism includes a support plate, a fixed plate and a movable plate, the bottom of the support plate is screwed with an electric lifting rod, a fixed plate is integrally formed in the middle of the surface of the support plate, movable plates are placed on both sides of the surface of the support plate, and a plurality of plug holes are opened on the surface of the movable plate.

[0007] Furthermore, a guide groove is provided on the side of the fixed plate, and a guide plate is integrally formed on the side of the movable plate, and the movable plate is embedded in the guide groove through the guide plate, and the bottom of the movable plate performs translational movement along the surface of the support plate, and the bottom end of the electric lifting rod is fixed to the surface of the bottom plate, and the fixed plate and the movable plate are both used to support and place the beef sample to be tested.

[0008] Furthermore, the locking and extending assembly includes a lifting shaft and a rotating shaft, a lifting rod is welded on the surface of the lifting shaft, a first spring is sleeved on the surface of the lifting rod, a lifting sleeve is welded on the surface of the detection platform, the top of the lifting rod is inserted into the interior of the lifting sleeve, and a linkage plate is sleeved on the surface of the lifting shaft.

[0009] Furthermore, the end of the linkage plate is welded to the surface of the rotating shaft, and the surface of the rotating shaft is also sleeved with a docking sleeve. The bottom end of the docking sleeve is welded with a plug-in rod, and the plug-in rod passes through the surface of the beef sample to be tested and is embedded in the interior of the plug-in hole. The locking and extension components are symmetrically installed on both sides of the cleaning mechanism.

[0010] Furthermore, the cleaning mechanism includes an outer sleeve and a flushing layer, the flushing layer is welded to the bottom side of the outer sleeve, a flushing pipe or a drainage pipe is inserted at the end of the flushing layer, and a drainage hole is provided on one side of the flushing layer connected to the drainage pipe, and a surrounding plate is integrally formed at the bottom of the outer sleeve.

[0011] Furthermore, a notch is provided on the side of the outer sleeve, and extension plates are integrally formed on both sides of the outer sleeve. A second spring is welded to the bottom of the extension plate, and the bottom of the second spring is welded to the surface of the detection platform. The outer sleeve moves up and down along the middle position of the detection platform.

[0012] Furthermore, the visual recognition component includes an inner sleeve and an image acquisition unit, the image acquisition unit is fixed on the top of the inner sleeve, and the top of the image acquisition unit is screwed to the bottom of the support frame, and a light source is embedded on the inner wall of the inner sleeve.

[0013] Furthermore, inner convex plates are integrally formed on both sides of the inner wall of the inner sleeve, a cover plate is installed at one end of the inner convex plate, and a reel is inserted on the inner side of the cover plate, a water-absorbing film is wound on the surface of the reel, and the bottom of the water-absorbing film is flush with the bottom of the inner sleeve.

[0014] A detection method using the above detection system comprises the following steps:

[0015] Step 1: Prepare the beef raw material to be tested and slice the beef sample;

[0016] Step 2: placing the beef sample into the sample testing device;

[0017] Step 3, plug and fix the two ends of the beef sample to be tested;

[0018] Step 4: Start the lifting mechanism and cooperate with the locking and stretching components to stretch and tighten the beef sample;

[0019] Step 5: Clean and dry the beef sample, control the surface moisture content, and complete the surface image acquisition of the beef sample;

[0020] Step 6: The collected surface image of the beef sample is transmitted to the detection platform, and after image preprocessing, the result is analyzed and output.

[0021] Beneficial effects of the present invention:

[0022] 1. After placing the beef sample to be tested inside the sample detection device, the present invention moves the beef sample to be tested upward with the help of the lifting mechanism at the bottom, and manually controls the locking and stretching components to plug and lock the two ends of the beef sample to be tested. In the subsequent lifting process, the beef sample can be stretched and tensioned to avoid the interference of wrinkles on the surface of the beef sample to be tested on the final result during the image acquisition process, thereby improving the accuracy of the detection. At the same time, it can also automatically avoid cracks in the beef sample caused by excessive stretching force, thereby improving the protection effect of the beef sample.

[0023] 2. After the present invention lifts the beef sample upward to dock with the cleaning mechanism, the purpose of flushing the beef sample can be achieved by injecting clean water. With the subsequent lifting process, in conjunction with the scroll and water-absorbing film on the inner side of the top inner sleeve, a fixed drying treatment can be provided for a fixed area and a fixed amount of accumulated water, so that the surface moisture content of the beef sample after the partial cleaning and drying is always maintained at a fixed standard, ensuring that the surface moisture content of different samples is highly consistent.

[0024] 3. In the early stage of the present invention, it is only necessary to slice the beef to be tested, and then the beef sample can be directly placed in the sample testing equipment for testing and processing. The subsequent steps of stretching, cleaning, and drying the beef sample can be automatically completed through a single lifting movement, which reduces the difficulty of pre-treatment of the beef sample in the early stage, and the entire testing process is highly standardized and unified. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a flow chart of a beef freshness detection method of the present invention;

[0026] Figure 2 This is a structural diagram of the sample detection device used in the detection method of the present invention;

[0027] Figure 3 is a cross-sectional view of part of the sample detection device of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the lifting mechanism part of the sample detection device of the present invention;

[0029] Figure 5 This is a disassembled diagram of the lifting mechanism of the present invention;

[0030] Figure 6 It is a schematic structural diagram of the locking and stretching component part of the sample detection device of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of part of the sample detection device of the present invention;

[0032] Figure 8 The figure is a disassembled diagram of the visual identification component and the cleaning mechanism of the present invention;

[0033] In the figure: 1. test table; 2. side plate; 3. bottom plate; 4. support frame; 5. visual recognition component; 6. cleaning mechanism; 7. lifting mechanism; 8. locking and stretching component; 9. lifting sleeve; 10. electric lifting rod; 11. support plate; 12. fixed plate; 13. movable plate; 14. plug-in hole; 15. guide plate; 16. guide groove; 17. rotating shaft; 18. plug-in rod; 19. linkage plate; 20. docking sleeve; 21. lifting shaft; 22. lifting rod; 23. first spring; 24. outer sleeve; 25. flushing layer; 26. drainage hole; 27. enclosure; 28. notch; 29. ​​flushing pipe; 30. drainage pipe; 31. extension plate; 32. second spring; 33. inner sleeve; 34. image acquisition unit; 35. light source; 36. cover plate; 37. inner convex plate; 38. reel; 39. water-absorbing film. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] See also Figures 1 to 8 The present invention provides the following technical solutions: a beef freshness detection system, the detection system includes a sample detection device and a detection platform, the sample detection device is equipped with a visual recognition component 5, a cleaning mechanism 6, a locking and stretching component 8 and a lifting mechanism 7, and the visual recognition component 5 is also equipped with a light source 35 control system, and a database of models, a feature extraction module and a prediction analysis module are established in the detection platform, side panels 2 are welded on both sides of the sample detection device, a detection platform 1 is welded on the top of the side panel 2, a bottom plate 3 is welded on the inner side of the side panel 2, a support frame 4 is welded on the surface of the detection platform 1, a cleaning mechanism 6 is inserted in the middle of the detection platform 1, the visual recognition component 5 passes through the inside of the cleaning mechanism 6, and an image acquisition unit 34 is screwed on the top of the visual recognition component 5, a locking and stretching component 8 is inserted at the bottom of the detection platform 1, and a plug-in rod 18 is installed at the end of the locking and stretching component 8, a lifting mechanism 7 is screwed on the surface of the bottom plate 3, and the locking and stretching component 8 is embedded in the surface of the lifting mechanism 7 through the plug-in rod 18 at the end. The beef freshness detection system uses visual recognition technology to detect the freshness of the placed beef samples to be tested.

[0036] When the present invention is used, the beef to be tested is first cut into a thicker sheet structure, and then placed on the surface of the lifting mechanism 7 of the detection equipment. The lifting mechanism 7 is used to lift and transport the beef sample upward until it comes into contact with the locking and extending component 8. Then, the plug-in rod 18 at the bottom of the locking and extending component 8 can be manually passed through the surface of the beef sample and then embedded into the plug-in hole 14 at the bottom. At this time, the installation process is completed. Subsequently, the lifting mechanism 7 is controlled to push the beef sample upward. At this time, the locking and stretching component 8 can be used to pull and stretch the beef sample toward both ends to achieve the purpose of tensioning the sheet beef sample. After tensioning to a certain extent, the lifting structure of the locking and stretching component 8 can be used to avoid further increasing the tension of the beef sample until it moves to dock with the cleaning mechanism 6. At this time, the tensioned beef sample can be rinsed by injecting clean water. After rinsing, the inner sleeve 33 is used to rotate the reel 38 at the bottom to adsorb the residual water after rinsing to achieve the dehydration effect, and ensure that the water content on the surface of the beef sample reaches a fixed value. Finally, the image acquisition unit 34 at the top can be used to complete the image sampling of the surface of the beef sample. Features related to the freshness of beef are extracted from the processed image. These features include chromaticity, texture, and shape information. These features are extracted and compared and matched with known patterns. An accurate and reliable discrimination model is established through the verification of the training set and the test set to evaluate the freshness level of the newly collected beef image.

[0037] In this embodiment, the lifting mechanism 7 includes a support plate 11, a fixed plate 12 and a movable plate 13. The bottom of the support plate 11 is screwed with an electric lifting rod 10. The fixed plate 12 is integrally formed in the middle of the surface of the support plate 11. The movable plates 13 are placed on both sides of the surface of the support plate 11. The surface of the movable plate 13 is provided with a plurality of plug holes 14. The side of the fixed plate 12 is provided with a guide groove 16. The side of the movable plate 13 is integrally formed with a guide plate 15. The movable plate 13 is embedded in the guide groove 16 through the guide plate 15. The bottom of the movable plate 13 moves in translation along the surface of the support plate 11. The bottom end of the electric lifting rod 10 is fixed to the surface of the bottom plate 3. The fixed plate 12 and the movable plate 13 are both used to support and place the beef sample to be tested. The locking and extending assembly 8 includes a lifting shaft 21 and a rotating shaft 17. A lifting rod 22 is welded on the surface of the lifting shaft 21. A first spring 23 is sleeved on the surface of the lifting rod 22. A lifting sleeve 9 is welded on the surface of the testing platform 1. The top of the lifting rod 22 is inserted into the interior of the lifting sleeve 9. A linkage plate 19 is sleeved on the surface of the lifting shaft 21. The end of the linkage plate 19 is welded to the surface of the rotating shaft 17. A docking sleeve 20 is also sleeved on the surface of the rotating shaft 17. A plug-in rod 18 is welded on the bottom end of the docking sleeve 20. The plug-in rod 18 passes through the surface of the beef sample to be tested and is embedded in the interior of the plug-in hole 14. The locking and extending assembly 8 is installed on both sides of the cleaning mechanism 6 in a symmetrical form. After the beef sample to be tested is placed inside the sample testing device, the beef sample to be tested is moved upward with the help of the lifting mechanism 7 at the bottom, and the locking and stretching components 8 are manually controlled to plug and lock the two ends of the beef sample to be tested. In the subsequent lifting process, the beef sample can be stretched and tensioned to avoid the interference of wrinkles on the surface of the beef sample to be tested on the final result during the image acquisition process, thereby improving the accuracy of the detection. At the same time, it can also automatically avoid cracks in the beef sample caused by excessive stretching force, thereby improving the protection effect of the beef sample.

[0038] Specifically, after placing the beef sample to be tested on the fixed plate 12 and the movable plate 13, the electric lifting rod 10 at the bottom is started to drive the beef sample laid at the bottom to move upward until it comes into contact with the plug-in rod 18 at the bottom of the locking extension component 8. Then, the plug-in rod 18 can be manually passed through the surface of the beef sample and then embedded into the plug-in hole 14 at the bottom. The plug-in hole 14 is used to fix the plug-in rod 18 to ensure that the plug-in rod 18 always remains in a vertical downward state. Subsequently, the electric lifting rod 10 is started again to move the beef sample upward. The docking sleeve 20 at the top pulls the rotating shaft 17 to rotate around the lifting shaft 21 at the top. At this time, due to the outward expansion of the connecting rod 18, a stretching and tensioning effect will be generated on the beef sample, and the beef sample will also provide resistance to the connecting rod 18 and the rotating shaft 17 to be pulled inward. Therefore, when the beef sample is tensioned to the moving degree, the rotating shaft 17 will not be able to continue to rotate. At this time, as the electric lifting rod 10 moves upward, only the lifting rod 22 in the locking and stretching assembly 8 can be driven to move upward, thereby ensuring that the beef sample can continue to maintain the tension and move upward.

[0039] In this embodiment, the cleaning mechanism 6 includes an outer sleeve 24 and a flushing layer 25. The flushing layer 25 is welded to the bottom side of the outer sleeve 24. A flushing pipe 29 or a drainage pipe 30 is inserted at the end of the flushing layer 25. A drainage hole 26 is provided on one side of the flushing layer 25 connected to the drainage pipe 30. A surrounding plate 27 is integrally formed at the bottom of the outer sleeve 24. A notch 28 is provided on the side of the outer sleeve 24. Extension plates 31 are integrally formed on both sides of the outer sleeve 24. A second spring 32 is welded to the bottom of the extension plate 31. The bottom of the second spring 32 is welded to the surface of the detection platform 1. The outer sleeve 24 moves up and down along the middle position of the detection platform 1. After the beef sample is lifted upward to dock with the cleaning mechanism 6, clean water can be injected to achieve the purpose of flushing the beef sample. With the subsequent lifting process, in conjunction with the scroll 38 and the water-absorbing film 39 on the inner side of the top inner sleeve 33, a fixed drying treatment can be provided for a fixed area and a fixed amount of water accumulation, so that the surface moisture content of the beef sample after this part of the cleaning and drying is always maintained at a fixed standard, ensuring that the surface moisture content of different samples is highly consistent.

[0040] Specifically, by injecting external clean water along the flushing pipe 29, it can be sprayed from the flushing layer 25 on one side toward the other side, thereby flushing and cleaning the beef sample portion arranged at the bottom of the outer sleeve 24, and discharged from the drainage hole 26 and the flushing layer 25 on the other side, and as the lifting mechanism 7 moves upward, the beef sample in the center area is finally pushed upward against the bottom position of the inner sleeve 33.

[0041] In this embodiment, the visual recognition component 5 includes an inner sleeve 33 and an image acquisition unit 34. The image acquisition unit 34 is fixed on the top of the inner sleeve 33, and the top of the image acquisition unit 34 is screwed to the bottom of the support frame 4. A light source 35 is embedded on the inner wall of the inner sleeve 33. The inner wall of the inner sleeve 33 is integrally formed with inner convex plates 37 on both sides. A cover plate 36 is installed at one end of the inner convex plate 37, and a reel 38 is inserted on the inner side of the cover plate 36. A water-absorbing film 39 is wound on the surface of the reel 38, and the bottom of the water-absorbing film 39 is flush with the bottom of the inner sleeve 33. In the early stage, it is only necessary to slice the beef to be tested, and then the beef sample can be directly placed in the sample detection equipment for detection and processing. The subsequent steps of stretching, cleaning, and drying the beef sample can be automatically completed through a single lifting movement, which reduces the difficulty of pre-processing the beef sample in the early stage, and the entire detection process is highly standardized and unified. Specifically, by rotating the cover plate 36 from the notch 28, the internal scroll 38 can be rotated, and the moisture on the surface of the beef sample can be absorbed by the water-absorbing film 39 on the scroll 38. Each time a different beef sample is tested, a fixed flushing time is performed, and the water-absorbing film 39 is rotated a fixed number of times to ensure that the surface moisture content of the beef samples in the subsequent identification and testing area remains highly consistent.

[0042] This embodiment also provides a detection method using the above detection system, including the following steps: preparing beef raw materials to be tested, and slicing the beef sample; step three, plugging and fixing the two ends of the beef sample to be tested; starting the lifting mechanism 7, and cooperating with the locking and stretching component 8 to stretch and tighten the beef sample;

[0043] Step 5. Clean and dry the beef samples, control the surface moisture content, and complete the surface image acquisition of the beef samples; transmit the collected surface images of the beef samples to the detection platform, perform image preprocessing, and then analyze and output the results. Based on color space models such as RGB and HIS, the color features of the beef samples are extracted, including the values ​​of color components such as red, green, and blue, as well as chromaticity, saturation, and brightness parameters. Image processing technology is then used to extract the texture features of the beef samples, including grayscale co-occurrence matrix and wavelet transform, to reflect the texture information of the beef surface. Finally, its shape features are extracted, including area, perimeter, and aspect ratio, to assist in judging freshness. According to the prediction results of the model, the differences in visual features of beef of different freshness are analyzed to further verify the reliability of the model.

[0044] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A beef freshness detection system, characterized in that: The detection system includes a sample detection device and a detection platform. The sample detection device is equipped with a visual recognition component, a cleaning mechanism, a locking and extending component and a lifting mechanism, and the visual recognition component is also equipped with a light source control system. The detection platform has a model database, a feature extraction module and a prediction analysis module. Side panels are welded on both sides of the sample detection device, a detection platform is welded on the top of the side panels, a bottom plate is welded on the inner side of the side panels, a support frame is welded on the surface of the detection platform, a cleaning mechanism is inserted in the middle of the detection platform, the visual recognition component passes through the inside of the cleaning mechanism, and an image acquisition unit is screwed on the top of the visual recognition component. A locking and extending component is inserted at the bottom of the detection platform, and a plug-in rod is installed at the end of the locking and extending component. The surface of the bottom plate is screwed with a lifting mechanism, and the locking and extending component is embedded in the surface of the lifting mechanism through the plug-in rod at the end.

2. A beef freshness detection system according to claim 1, characterized in that: The lifting mechanism includes a support plate, a fixed plate and a movable plate. An electric lifting rod is screwed to the bottom of the support plate. A fixed plate is integrally formed in the middle of the surface of the support plate. Movable plates are placed on both sides of the surface of the support plate. A plurality of plug holes are opened on the surface of the movable plate.

3. A beef freshness detection system according to claim 2, characterized in that: A guide groove is provided on the side of the fixed plate, and a guide plate is integrally formed on the side of the movable plate, and the movable plate is embedded in the guide groove through the guide plate, and the bottom of the movable plate performs translational movement along the surface of the support plate, and the bottom end of the electric lifting rod is fixed to the surface of the bottom plate, and the fixed plate and the movable plate are both used to support and place the beef sample to be tested.

4. A beef freshness detection system according to claim 2, characterized in that: The locking and extending assembly includes a lifting shaft and a rotating shaft, a lifting rod is welded on the surface of the lifting shaft, a first spring is sleeved on the surface of the lifting rod, a lifting sleeve is welded on the surface of the detection platform, the top of the lifting rod is inserted into the interior of the lifting sleeve, and a linkage plate is sleeved on the surface of the lifting shaft.

5. A beef freshness detection system according to claim 4, characterized in that: The end of the linkage plate is welded to the surface of the rotating shaft, and a docking sleeve is also sleeved on the surface of the rotating shaft. A plug-in rod is welded to the bottom end of the docking sleeve. The plug-in rod passes through the surface of the beef sample to be tested and is embedded in the interior of the plug-in hole. The locking and extending components are symmetrically installed on both sides of the cleaning mechanism.

6. A beef freshness detection system according to claim 1, characterized in that: The cleaning mechanism includes an outer sleeve and a flushing layer. The flushing layer is welded to the bottom side of the outer sleeve. A flushing pipe or a drainage pipe is inserted at the end of the flushing layer, and a drainage hole is opened on the side of the flushing layer connected to the drainage pipe. The bottom of the outer sleeve is integrally formed with a surrounding plate.

7. A beef freshness detection system according to claim 6, characterized in that: A notch is provided on the side of the outer sleeve, and extension plates are integrally formed on both sides of the outer sleeve. A second spring is welded to the bottom of the extension plate, and the bottom of the second spring is welded to the surface of the detection platform. The outer sleeve moves up and down along the middle position of the detection platform.

8. A beef freshness detection system according to claim 6, characterized in that: The visual recognition component includes an inner sleeve and an image acquisition unit, wherein the image acquisition unit is fixed on the top of the inner sleeve, and the top of the image acquisition unit is screwed to the bottom of the support frame, and a light source is embedded on the inner wall of the inner sleeve.

9. A beef freshness detection system according to claim 8, characterized in that: The inner wall of the inner sleeve is integrally formed with inner convex plates on both sides, a cover plate is installed at one end of the inner convex plate, and a reel is inserted on the inner side of the cover plate. A water-absorbing film is wound on the surface of the reel, and the bottom of the water-absorbing film is flush with the bottom of the inner sleeve.

10. A detection method using the detection system according to claim 1, characterized in that: The following steps are involved: Step 1: Prepare the beef raw material to be tested and slice the beef sample; Step 2: placing the beef sample into the sample testing device; Step 3, plug and fix the two ends of the beef sample to be tested; Step 4: Start the lifting mechanism and cooperate with the locking and stretching components to stretch and tighten the beef sample; Step 5: Clean and dry the beef sample, control the surface moisture content, and complete the surface image acquisition of the beef sample; Step 6: The collected surface image of the beef sample is transmitted to the detection platform, and after image preprocessing, the result is analyzed and output.

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