A device for uniform spreading of down and a method for detecting quality of down

Abstract

The application relates to the technical field of down detection, and discloses a down uniform spreading device and a down quality detection method.The spreading device comprises a box body, a barrel body, a suction mechanism, a protection assembly, a recovery assembly, an opening degree adjusting assembly and an image acquisition mechanism.The top of the box body is provided with an open window, and a transparent plate is arranged in the open window.The barrel body is placed on the transparent plate and is uniformly distributed with air inlets in the circumferential direction.The suction mechanism is fixedly arranged in the box body, and a suction port cover of the suction mechanism is arranged on the top of the barrel body.The protection assembly is arranged between the top of the barrel body and the suction port of the suction mechanism.The recovery assembly is arranged in the box body and is connected with the suction mechanism.The opening degree adjusting assembly is arranged on the outer periphery of the barrel body.The image acquisition mechanism is fixedly arranged in the box body and is located below the transparent plate.The control mechanism is fixedly arranged on the box body and is electrically connected with the suction mechanism and the image acquisition mechanism.The application realizes efficient dispersion, controllable settlement and uniform spreading of down, provides a standardized sample preparation guarantee for automatic visual detection of down quality, and improves the accuracy and reliability of detection.

Description

Technical Field

[0001] This invention relates to the field of down testing technology, and in particular to a down uniform spreading device and a down quality testing method. Background Technology

[0002] In the field of down product quality testing, down content and impurity rate are core indicators. With the development of the industry, automated and standardized testing technologies have become the mainstream development trend in down quality testing. Automated visual inspection, as a core technology, requires that the down sample be evenly spread on the surface of the testing carrier to ensure that each fiber unit can be clearly imaged and identified.

[0003] To meet the sample preparation requirements of automated testing, existing technologies have developed automated spreading schemes using vibrating screens or unidirectional airflow devices. However, due to the lightweight nature of down, its susceptibility to electrostatic adsorption, and the influence of air resistance, it is prone to fiber clumping. Furthermore, the single airflow can easily cause down to scatter or accumulate in certain areas, resulting in incomplete dispersion and poor spreading uniformity. In addition, the down spreading effect is closely related to the sample's load per unit area. Excessive load can lead to stacking, while insufficient load results in inadequate sample coverage, leading to poor repeatability of spreading effects between different batches of samples and making it difficult to meet standardized testing requirements. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the existing technology, it is desirable to provide a down uniform spreading device and a down quality detection method to achieve efficient dispersion, controllable sedimentation and uniform spreading of down, provide standardized sample preparation guarantee for automated visual inspection of down quality, and improve the accuracy and reliability of detection.

[0005] The present invention provides a down spreading device, comprising: The box body has a window on its top, and a transparent panel is fixedly installed inside the window; The cylindrical body is made of transparent material and is placed on the transparent plate. Several air inlets are evenly distributed along the circumference on the side wall near the bottom. A suction mechanism is fixedly installed inside the box, with its suction port extending out of the box and separately covering the top of the cylinder; A protective component is separately disposed between the top of the cylinder and the air intake of the suction mechanism, so that the down bedding is prevented from being sucked away by the suction mechanism while the suction mechanism can draw air out of the cylinder. A recycling component, located inside the housing and connected to the suction mechanism, is used to collect the down feathers extracted by the suction mechanism after the protective component is removed. An opening adjustment component is disposed on the outer periphery of the cylinder near the bottom end, and is used to independently adjust the opening of each of the air inlets; An image acquisition mechanism is fixedly installed inside the box, located below the transparent plate; The control mechanism is fixedly mounted on the housing and electrically connected to the suction mechanism and the image acquisition mechanism, respectively.

[0006] Furthermore, the transparent plate is made of glass or transparent resin material, and its top surface is treated with antistatic agents; the cylinder is made of glass or transparent resin material, and its inner wall surface is treated with antistatic agents.

[0007] Furthermore, the suction mechanism includes an adjustable negative pressure fan fixedly installed inside the housing. A top cover is separately provided on the top of the cylinder. A suction pipe is connected to the top of the top cover. The suction pipe is connected to the adjustable negative pressure fan through a steel wire hose. A control valve is provided on the suction pipe.

[0008] Furthermore, the protective assembly includes a cover plate separately disposed on the top of the cylinder, the cover plate being densely covered with perforations, and a first mesh fixedly disposed on the bottom surface of the cover plate.

[0009] Furthermore, the recycling assembly includes a recycling bin integrally disposed within the box body, and a door communicating with the recycling bin is provided on one side of the box body; The top of the box is provided with an air inlet pipe that communicates with the recycling box, and the end of the steel wire hose away from the suction pipe is connected to the air inlet pipe; one side of the recycling box is connected to the adjustable negative pressure fan, and a protective net is fixedly installed between the two.

[0010] Furthermore, the opening adjustment component includes a sealing plate, and a second mesh covering each air inlet is fixedly provided on the outer periphery of the cylinder. A first slide rail and a second slide rail are provided on the outer wall of the cylinder. The first slide rail is located above each air inlet, and the second slide rail is located below each air inlet. The sealing plate is provided on the outer side of each air inlet in a corresponding manner. The top end of the sealing plate is slidably connected to the first slide rail, and the bottom end is slidably connected to the second slide rail.

[0011] Furthermore, the image acquisition mechanism includes an image acquisition device and an LED light source fixedly installed inside the housing; the image acquisition device is a scanner or an industrial camera.

[0012] Furthermore, the control mechanism includes a control box, on which a touch screen is provided, and inside the control box are a microcontroller and a memory. A wind speed sensor and a barometric pressure sensor are fixedly installed on the inner wall of the top cover, and both the wind speed sensor and the barometric pressure sensor are communicatively connected to the microcontroller.

[0013] Furthermore, the present invention also provides a method for detecting down quality using the aforementioned down uniform spreading device, comprising the following steps: 1) Prepare reference samples; High-loft white goose down with a down content of ≥95% was selected as the reference sample. Multiple sets of reference samples were weighed according to the preset weight gradient. Multiple parallel samples were set for each set of reference samples. Each set of reference samples was put into a sealed bag, labeled and distributed for use. 2) Spreading detection of a single set of reference samples; Take a set of reference samples and slowly put one of the parallel samples into the cylinder; start the suction mechanism, set the suction rate, and adjust the opening of each air inlet through the opening adjustment component to make the parallel sample fully suspended and dispersed in the cylinder; then reduce the suction rate of the suction mechanism, and in conjunction with the opening adjustment of each air inlet, make the parallel sample sink to the transparent plate at a low kinetic energy and uniform speed to form a spreading area, and then turn off the suction mechanism. The image acquisition mechanism is activated to detect the uniform spreading state of the parallel samples on the transparent plate, determine whether it meets the preset qualification standard, and record the operating parameters of the device and the spreading effect of the parallel samples. After the test is completed, remove the protective components, start the suction mechanism, adjust the suction rate, and use negative pressure suction to extract the parallel samples inside the cylinder and on the transparent plate to the recovery component; after recovery, turn off the suction mechanism, clean the parallel samples in the recovery component, and then reset the device; and then complete the spreading test of the remaining parallel samples of the reference sample group in sequence. 3) Determination of the critical weight threshold; Following the operation procedure in step 2), the remaining reference samples were spread and tested sequentially; the spread effect data of each reference sample were summarized, and the weight range of reference samples that could achieve stable and uniform spread was selected to determine the critical weight threshold; the critical weight threshold was verified multiple times in parallel, and the verification results all met the requirements for uniform spread, confirming that the critical weight threshold was stable and reliable. 4) Quality testing of the sample to be tested; Weigh the sample to be tested according to the critical weight threshold; spread the sample to be tested at a uniform speed according to the operation procedure in step 2), and perform quality detection on the sample to be tested through the image acquisition mechanism; after the detection is completed, clean the sample to be tested in the recycling component, and then reset the device.

[0014] Compared with the prior art, the beneficial effects of the present invention are: (1) This invention obtains the critical weight threshold for down spreading through the cooperation of the suction mechanism and the opening adjustment component. When conducting down testing, the down to be tested is weighed according to the critical weight threshold, laying the foundation for its uniform spreading; it achieves efficient dispersion, controllable sedimentation and uniform spreading of down; and the spreading repeatability of different batches and different types of down samples is excellent and highly reliable, providing standardized sample preparation guarantee for automated visual inspection of down quality. It ensures accurate detection of down and has the potential for large-scale testing applications; (2) After the down test is completed, the present invention achieves a sample recovery rate of more than 95% through the recycling mechanism, avoiding waste of down samples; at the same time, it ensures the purity of the recovered samples and meets the requirements of retesting, and the practicality and economy of the test are excellent.

[0015] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0016] The invention will be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale, but rather the emphasis is on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0017] Figure 1 A schematic diagram of a device for evenly spreading down feathers; Figure 2 Exploded view of a device for evenly spreading down feathers; Figure 3 This is a schematic diagram of the protective component. Figure 4 This is an image showing the effect of evenly spreading down feathers.

[0018] The diagram labels are as follows: 1. Box body; 2. Cylinder body; 3. Suction mechanism; 4. Protective components; 5. Opening adjustment components; 6. Air inlet pipe; 11. Window; 12. Transparent panel; 13. Box door; 21. Air inlet; 31. Top cover; 32. Suction pipe; 33. Steel wire flexible hose; 41. Cover plate; 42. Hole; 43. First mesh screen; 51. Sealing plate; 52. Second mesh screen; 53. First slide rail; 54. Second slide rail. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of protection of the invention.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] In this invention, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0023] Please refer to Figures 1-4 An embodiment of the present invention provides a down uniform spreading device, comprising: The box 1 has a window 11 on its top, and a transparent panel 12 is fixedly installed inside the window 11; The cylinder 2 is made of transparent material and is placed on the transparent plate 12. Several air inlets 21 are evenly distributed along the circumference on the side wall near the bottom. The suction mechanism 3 is fixedly installed inside the box 1, and its suction port extends out of the box 1 and is separately covered on the top of the cylinder 2. The protective component 4 is separately installed between the top of the cylinder 2 and the air intake of the suction mechanism 3, so that the suction mechanism 3 can draw air out of the cylinder 2 while preventing the down comforter from being sucked away. The recycling component is located inside the housing 1 and is connected to the suction mechanism 3. It is used to collect the down extracted by the suction mechanism 3 after the protective component 4 is removed. The opening adjustment component 5 is located on the outer periphery of the cylinder 2 near the bottom end, and is used to independently adjust the opening of each air inlet 21; The image acquisition mechanism is fixedly installed inside the housing 1, located below the transparent plate 12; The control mechanism is fixedly installed on the housing 1 and is electrically connected to the suction mechanism 3 and the image acquisition mechanism respectively.

[0024] In this embodiment, during down testing, the down to be tested is slowly placed into the cylinder 2, then the protective component 4 is placed on top of the cylinder 2, and the suction mask of the suction mechanism 3 is placed on top of the cylinder 2. At this time, the equipment is started to complete the uniform spreading of the down to be tested and the quality inspection after spreading. The down uniform spreading device achieves efficient dispersion, controllable sedimentation and uniform spreading of down; and the spreading repeatability of different batches and different types of down samples is excellent, with high reliability, providing standardized sample preparation guarantee for automated visual inspection of down quality; ensuring accurate detection of down and having the application potential for large-scale detection.

[0025] After the down sample is tested, the protective component 4 is removed, and the down sample inside the cylinder 2 and on the transparent plate 12 is extracted into the recycling mechanism by the suction mechanism 3, achieving a sample recovery rate of over 95% and avoiding waste of down samples; at the same time, the purity of the recycled samples is guaranteed to meet the requirements of retesting, and the test is both practical and economical.

[0026] In a preferred embodiment, the transparent plate 12 is made of glass or transparent resin material so that the image acquisition mechanism can acquire image information through the transparent plate 12; the top surface of the transparent plate 12 is treated with antistatic agents, which can be added to the raw materials or covered with antistatic film to avoid static electricity affecting the uniform spread of down.

[0027] The cylinder 2 is made of glass or transparent resin material so that the inspectors can observe the suspension and falling of the down inside the cylinder 2; the inner wall of the cylinder 2 is treated with anti-static treatment, and the principle and effect are the same as those of the transparent plate 12.

[0028] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, the suction mechanism 3 includes an adjustable negative pressure fan fixedly installed inside the housing 1. A top cover 31 is separately installed on the top of the cylinder 2. A suction pipe 32 is connected to the top of the top cover 31. The suction pipe 32 is connected to the adjustable negative pressure fan through a steel wire hose 33. A control valve is installed on the suction pipe 32.

[0029] In this embodiment, the exhaust duct uses a steel wire flexible hose 33 to ensure that there is enough space in its internal bends to avoid affecting the exhaust effect.

[0030] When spreading down, start the adjustable negative pressure fan and open the control valve to create an upward airflow inside the cylinder 2; adjust the suction rate of the adjustable negative pressure fan to ensure that the down is fully suspended inside the cylinder 2, thus ensuring the spreading effect of the down.

[0031] Preferably, the bottom edge of the top cover 31 is provided with a groove that matches the top of the cylinder 2. When the top cover 31 is fastened onto the cylinder 2, it is embedded in the groove. A sealing ring is provided in the groove to ensure sealing.

[0032] In a preferred embodiment, such as Figure 2 and Figure 3 As shown, the protective component 4 includes a cover plate 41 separately disposed on the top of the cylinder 2, the cover plate 41 having densely distributed perforations 42, and a first mesh 43 fixedly disposed on the bottom surface of the cover plate 41.

[0033] In this embodiment, when spreading the down, the cover plate 41 is placed at the top of the cylinder 2 to prevent the suction mechanism 3 from drawing the down away; after the test is completed, the cover plate 41 is removed, at which point the suction mechanism 3 draws the down into the collection component for collection. This ensures that the suction mechanism 3 can perform different functions as needed.

[0034] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, the recycling assembly includes an integral recycling bin housed within a housing 1, and a door 13 communicating with the recycling bin is provided on one side of the housing 1.

[0035] The top of the box 1 is provided with an air inlet pipe 6 that is connected to the recycling box. The end of the steel wire hose 33 away from the suction pipe 32 is connected to the air inlet pipe 6. One side of the recycling box is connected to an adjustable negative pressure fan, and a protective net is fixedly installed between the two.

[0036] In this embodiment, when collecting down, an adjustable negative pressure fan is activated to create negative pressure inside the collection box, and the down enters the collection box for collection through the steel wire hose 33. After the down collection is completed, the box door 13 is opened, the down in the collection box is taken out and put into a plastic bag, and the box door 13 is closed after cleaning. The down collection effect is good and resource waste is avoided.

[0037] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, the opening adjustment component 5 includes a sealing plate 51. A second mesh 52 is fixedly installed on the outer periphery of the cylinder 2, covering each air inlet 21. A first slide rail 53 and a second slide rail 54 are provided on the outer wall of the cylinder 2. The first slide rail 53 is located above each air inlet 21, and the second slide rail 54 is located below each air inlet 21. A sealing plate 51 is provided on the outer side of each air inlet 21 in a corresponding manner. The top end of the sealing plate 51 is slidably connected to the first slide rail 53, and the bottom end is slidably connected to the second slide rail 54.

[0038] In this embodiment, when the down is suspended inside the cylinder 2, if there are clumps of down, the nearest air inlet 21 is located, the sealing plate 51 is moved back and forth to adjust the opening of the air inlet 21, thereby changing the airflow inside the cylinder 2. The fluctuating airflow disperses the down clumps, so that the down is fully dispersed and suspended, ensuring that the down is evenly spread.

[0039] In a preferred embodiment, the image acquisition mechanism includes an image acquisition device and an LED light source fixedly installed inside the housing 1; the image acquisition device is a scanner or an industrial camera; illumination is provided by the LED light source, and the image acquisition device acquires images of the spread down feathers for automated detection of down quality.

[0040] In a preferred embodiment, the control mechanism includes a control box, on which a touch screen is provided, and inside the control box are a microcontroller and a memory. A wind speed sensor and a barometric pressure sensor are fixedly installed on the inner wall of the top cover, and both the wind speed sensor and the barometric pressure sensor are communicatively connected to the microcontroller.

[0041] In this embodiment, the detection data is stored in a memory and then transmitted to a computer via wired or wireless means for data processing and analysis. Relevant data during the detection process is collected by wind speed and air pressure sensors, which serve as the basis for optimizing process parameters and continuously improving the detection effect.

[0042] Furthermore, embodiments of the present invention also provide a method for detecting down quality using the aforementioned down uniform spreading device, comprising the following steps: S1: Prepare a reference sample; High-loft white goose down with a down content greater than or equal to a preset threshold, such as 95%, was selected as the reference sample to ensure the accuracy and universality of the threshold determination. Five sets of reference samples were weighed according to a preset weight gradient, with gradient weights set at 0.1g, 0.15g, 0.2g, 0.25g, and 0.3g, respectively. Three parallel samples were set for each set of reference samples (to reduce experimental error). Each set of reference samples was placed into a sealed bag, labeled, and prepared for use.

[0043] S2: Spreading detection of a single set of reference samples; Take a set of 0.1g reference samples and slowly put one of the parallel samples into the cylinder 2 (50cm high, 20cm inner diameter); then place the cover plate 41 and the top cover 31 on the top of the cylinder 2 in sequence; start the suction mechanism 3, set the suction rate to 0.5m / s, and form a negative pressure of -50Pa; air enters the cylinder 2 through each air inlet 21 to form an upward airflow, so that the parallel sample is suspended in the cylinder 2; adjust the opening of each air inlet 21 through the opening adjustment component 5, and disperse the down tufts through the fluctuating airflow to make the parallel sample fully suspended and dispersed in the cylinder 2; then reduce the suction rate of the suction mechanism 3, and in conjunction with the opening adjustment of each air inlet 21, make the parallel sample sink to the transparent plate 12 at a low kinetic energy and uniform speed to form a spreading area, and then close the suction mechanism.

[0044] The image acquisition mechanism is activated to detect the uniform spreading state of the parallel samples on the transparent plate 12, determine whether it meets the preset qualification standard, and record the operating parameters of the device and the spreading effect of the parallel samples.

[0045] For a uniformly spread state, the standard deviation and average gray value of the pixels in the down-covered area of ​​the down image can be obtained first. The gray value variation coefficient is obtained based on the ratio of the standard deviation and average gray value of the pixels in the down-covered area = standard deviation / average gray value of the pixels in the down-covered area. This eliminates the influence of absolute brightness and focuses on local contrast differences.

[0046] Next, the actual number of down clumps is obtained from the down images, and the optimal number of down clumps is determined through benchmark experiments. Based on the actual number of down clumps and the optimal number of down clumps, a down clump penalty factor is obtained: |1 - optimal number of down clumps / actual number of down clumps|. The optimal number of down clumps can characterize the best dispersion state. By introducing the optimal number of down clumps, both severe down clumping and excessive dispersion of broken down can be penalized simultaneously.

[0047] Finally, based on the grayscale variation coefficient and the down tuft penalty factor, a uniformity index is obtained to characterize the evenness of down spreading. The uniformity index is calculated as: Uniformity Index = 1 - α × Grayscale Variation Coefficient - β × Down Tuft Penalty Factor. Here, α and β are weighting coefficients, which can be determined through experimental fitting to adapt to different down types and devices. For example, a uniformity index ≈ 1 indicates highly uniform spreading with no stacking or gaps; a uniformity index < 0.8 indicates uneven spreading, requiring respreading.

[0048] In this embodiment, when the uniformity index is ≥0.9, the spreading is deemed qualified, that is, the preset qualification standard is met.

[0049] The uniformity index is automatically calculated from image data (grayscale value, number of clusters), which standardizes the detection results and provides preprocessing verification for automated visual inspection of down quality (such as down content analysis), avoiding false detections caused by uneven spreading.

[0050] After the test is completed, remove the protective component 4, start the suction mechanism 3, adjust the suction rate to form a negative pressure of -80Pa, and use the negative pressure suction to extract the parallel samples inside the cylinder 2 and on the transparent plate 12 to the recovery component; after the recovery is completed, turn off the suction mechanism 3, clean the parallel samples in the recovery component, and then reset the device; and then complete the spreading test of the remaining 2 parallel samples of the reference sample in sequence.

[0051] S3: Determination of critical weight threshold; Following the operation procedure in step S2, the remaining 4 sets of reference samples were spread and tested sequentially. After each set of operations, the cylinder 2 and the recovery component had to be cleaned to avoid residual down affecting the test results of the next set. The spread effect data of each set of reference samples were summarized, and the weight range of reference samples that could achieve stable and uniform spread (meeting the preset qualified standard) was selected to determine the critical weight threshold. The critical weight threshold was verified in parallel multiple times. The verification results all met the uniform spread requirements, confirming that the critical weight threshold was stable and reliable.

[0052] In this embodiment, the 0.15g and 0.2g groups of reference samples exhibited excellent spreading uniformity, with no local aggregation or dispersion issues. Therefore, 0.18g was selected as the core critical reference weight; combined with a spreading area of ​​0.0314m²... 2 The calculated load per unit area is 5.732 g / m². 2 This value was used as the critical weight threshold, and the threshold was verified three times in parallel. The verification results all met the requirement of uniform spreading, confirming that the critical weight threshold is stable and reliable.

[0053] In a preferred embodiment, the critical weight threshold Its main purpose is to quantify the critical threshold for uniform distribution of down, ensuring that the sample forms a standardized distribution on the transparent plate and avoiding problems such as stacking or insufficient coverage. The critical sample mass can be understood as the mass of the down sample determined experimentally to ensure uniform distribution in the spreading device, such as the 0.18g high-loft white goose down mentioned above; the effective spreading area is the usable area of ​​the transparent plate, which depends on the geometry of the bottom of the cylinder.

[0054] Among them, the critical weight threshold W, which is the load per unit area, represents the maximum allowable down mass per unit area. Exceeding this value can easily lead to stacking, while insufficient weight results in inadequate coverage. and represent the apparent bulk density and fill power factor of down, respectively. Apparent bulk density is the actual volume density in a fluffy state, while fill power factor quantifies the loft of down. The higher the fill power, the larger the value; for example, the fill power factor for high-loft white goose down is ≥1.2. K and A represent the overall calibration constant and effective spreading area of ​​the device, respectively. The overall calibration constant can be fitted experimentally using a reference sample, such as high-loft white goose down, to quickly adapt to different down samples.

[0055] Traditional methods rely on empirical weight selection. The critical weight threshold function, by calculating the load per unit area, can guide the accurate weighing of critical sample mass, providing a repeatable basis for automated visual inspection (such as down content and impurity rate analysis). By combining down properties (apparent bulk density and loft) and device characteristics (device comprehensive calibration constant), the critical weight threshold function model is applicable to different types of down, such as white goose down and grey duck down, thereby improving universality and detection repeatability.

[0056] S4: Quality inspection of the sample to be tested; Two types of typical down feathers were selected as test samples (Sample 1: 85% white goose down; Sample 2: 80% grey duck down with a small amount of impurities). Based on the critical weight threshold and the spreading area, the weight of each type of test sample was calculated and accurately weighed to 0.18g.

[0057] Following the procedure in step S2, sample 1 and sample 2 are spread out at a uniform speed, and corresponding image data is acquired through the image acquisition mechanism. The two sets of image data are then transmitted to the automated visual inspection system for data processing and analysis to accurately detect core quality indicators such as fluff content and impurity rate.

[0058] After each set of samples was tested, the recovery components were cleaned and the device was reset.

[0059] This application achieves efficient dispersion, controllable sedimentation, and uniform spreading of down, providing standardized sample preparation assurance for automated visual inspection of down quality, and improving the accuracy and reliability of the inspection.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A device for evenly spreading down feathers, characterized in that, include: The box body (1) has a window (11) on its top, and a transparent plate (12) is fixedly installed inside the window (11); The cylindrical body (2) is placed on the transparent plate (12), and several air inlets (21) are provided on its side wall near the bottom. The suction mechanism (3) is fixedly installed inside the box (1), and its suction port extends out of the box (1) and is separately covered on the top of the cylinder (2); The protective component (4) is separately disposed between the top of the cylinder (2) and the air inlet of the suction mechanism (3) to prevent the down comforter from being sucked away by the suction mechanism (3) while the air inside the cylinder (2) is being drawn out by the suction mechanism (3). A recycling component is installed inside the housing (1) and connected to the suction mechanism (3) for collecting the down extracted by the suction mechanism (3) after the protective component (4) is removed; An opening adjustment component (5) is disposed on the outer periphery of the cylinder (2) near the bottom end, and is used to independently adjust the opening of each air inlet (21); The image acquisition mechanism is fixedly installed inside the housing (1) and located below the transparent plate (12); The control mechanism is fixedly installed on the housing (1) and electrically connected to the suction mechanism (3) and the image acquisition mechanism respectively.

2. The down spreading device according to claim 1, characterized in that, The transparent plate (12) is made of glass or transparent resin material, and its top surface is treated with antistatic treatment; the cylinder (2) is made of glass or transparent resin material, and its inner wall surface is treated with antistatic treatment.

3. The down spreading device according to claim 1, characterized in that, The suction mechanism (3) includes an adjustable negative pressure fan fixedly installed inside the housing (1). A top cover (31) is separately installed on the top of the cylinder (2). A suction pipe (32) is connected to the top of the top cover (31). The suction pipe (32) is connected to the adjustable negative pressure fan through a steel wire hose (33). A control valve is installed on the suction pipe (32).

4. The down spreading device according to claim 3, characterized in that, The protective component (4) includes a cover plate (41) separately disposed on the top of the cylinder (2), the cover plate (41) having densely distributed perforations (42), and a first mesh (43) fixedly disposed on the bottom surface of the cover plate (41).

5. The down spreading device according to claim 3, characterized in that, The recycling assembly includes an integral recycling bin disposed inside the box body (1), and a box door (13) communicating with the recycling bin is provided on one side of the box body (1); The top of the box (1) is provided with an air inlet pipe (6) that communicates with the recycling box. The end of the steel wire hose (33) away from the suction pipe (32) is connected to the air inlet pipe (6). One side of the recycling box is connected to the adjustable negative pressure fan, and a protective net is fixedly installed between the two.

6. The down spreading device according to claim 1, characterized in that, The opening adjustment component (5) includes a sealing plate (51). A second mesh (52) is fixedly provided on the outer periphery of the cylinder (2) and covers each of the air inlets (21). A first slide rail (53) and a second slide rail (54) are provided on the outer wall of the cylinder (2). The first slide rail (53) is located above each of the air inlets (21), and the second slide rail (54) is located below each of the air inlets (21). The sealing plate (51) is provided on the outer side of each of the air inlets (21) in a corresponding manner. The top end of the sealing plate (51) is slidably connected to the first slide rail (53), and the bottom end of the sealing plate (51) is slidably connected to the second slide rail (54).

7. The down spreading device according to claim 1, characterized in that, The image acquisition mechanism includes an image acquisition device and an LED light source fixedly installed inside the housing (1); the image acquisition device is a scanner or an industrial camera.

8. The down uniform spreading device according to claim 3, characterized in that, The control mechanism includes a control box, on which a touch screen is provided. The control box contains a microcontroller and a memory. A wind speed sensor and a pressure sensor are fixedly installed on the inner wall of the top cover (31). The wind speed sensor and the pressure sensor are both connected to the microcontroller.

9. A method for detecting down quality using the down uniform spreading device according to any one of claims 1-8, characterized in that, Includes the following steps: 1) Prepare reference samples; High-loft white goose down with a down content greater than or equal to a preset threshold was selected as the reference sample. Multiple sets of reference samples were weighed according to the preset weight gradient. Multiple parallel samples were set for each set of reference samples. Each set of reference samples was put into a sealed bag, labeled and distributed for use. 2) Spreading test of a single set of reference samples; Take a set of reference samples and slowly put one of the parallel samples into the cylinder (2); start the suction mechanism (3), set the suction rate, and adjust the opening of each air inlet (21) through the opening adjustment component (5) so that the parallel sample is fully suspended and dispersed in the cylinder (2); then reduce the suction rate of the suction mechanism (3), and adjust the opening of each air inlet (21) to make the parallel sample sink to the transparent plate (12) at a low kinetic energy and uniform speed to form a spreading area, and then close the suction mechanism (3); Start the image acquisition mechanism to detect the uniform spreading state of the parallel samples on the transparent plate (12), determine whether it meets the preset qualification standard, and record the operating parameters of the device and the spreading effect of the parallel samples. After the test is completed, remove the protective component (4), start the suction mechanism (3), adjust the suction rate, and use negative pressure suction to extract the parallel samples inside the cylinder (2) and on the transparent plate (12) to the recovery component; after the recovery is completed, turn off the suction mechanism (3), clean the parallel samples in the recovery component, and then reset the device; and complete the spreading test of the remaining parallel samples of the reference sample in sequence. 3) Determination of the critical weight threshold; Following the operation procedure in step 2), the remaining reference samples were spread and tested in sequence; the spread effect data of each reference sample were summarized, the weight range of reference samples that can achieve stable and uniform spread was selected, and the critical weight threshold was determined. Multiple parallel verifications were performed on the critical weight threshold, and the verification results all met the requirement of uniform spreading, confirming that the critical weight threshold is stable and reliable. 4) Quality testing of the sample to be tested; Weigh the sample to be tested according to the critical weight threshold; spread the sample to be tested at a uniform speed according to the operation procedure in step 2), and perform quality detection on the sample to be tested through the image acquisition mechanism; after the detection is completed, clean the sample to be tested in the recycling component, and then reset the device.

Images