Fabric stiffness comprehensive feature acquisition device and method based on multi-aperture annulus

Abstract

This invention belongs to the field of fabric performance testing technology and provides a device and method for collecting comprehensive characteristics of fabric stiffness based on multi-pore rings. The device includes a fabric sample fixing bracket, an upper magnet, a lower magnet, multiple sets of rings with different pore sizes, a scale, and a camera. The upper magnet is fixed to the top of the fabric sample fixing bracket. The multiple sets of rings with different pore sizes are fitted onto the fabric sample fixing bracket and can fall freely along the bracket. The lower magnet is positioned opposite the upper magnet, and the circular fabric sample is held between them by magnetic attraction, allowing the fabric to droop naturally under its own weight. This invention requires no complex equipment, is easy to operate, and provides accurate test results, precisely distinguishing differences in fabric performance. It is suitable for the research, development, quality inspection, and selection of various textile fabrics and is easily adopted by small and medium-sized textile enterprises.

Description

Technical Field

[0001] This invention belongs to the field of fabric performance testing technology, and particularly relates to a device and method for collecting comprehensive characteristics of fabric stiffness based on multi-pore circular rings. Background Technology

[0002] Fabric stiffness and compression stiffness are core performance indicators for measuring the stability and shape retention of fabrics. They directly determine the fit, drape, and shape retention of clothing, and also affect the smoothness of home textiles and the structural stability of industrial fabrics. They are important references for research and development, production, testing, and market selection in the fabric industry chain.

[0003] Currently, existing technologies for testing fabric stiffness mostly employ single-specification measuring instruments (such as the cantilever of a stiffness meter or the single ring of a drape meter). These instruments can only measure single parameters such as the bending stiffness and drape angle of the fabric, resulting in a limited measurement dimension. They cannot simultaneously reflect the fabric's stiffness and compressive stiffness characteristics, and feature extraction is incomplete. Some testing devices can only obtain qualitative evaluation results of fabric stiffness, making it difficult to generate standardized and quantitative characteristic indicators or curves. This makes it impossible to accurately distinguish and compare subtle differences in stiffness between different fabrics. Furthermore, traditional testing devices often use clamps to hold the fabric in place, which can easily cause stretching or compression deformation at the fabric edges. This leads to discrepancies between the test results and the actual usage state of the fabric. In addition, they lack the ability to dynamically acquire stiffness characteristics of the fabric under natural drape, failing to truly reflect the actual performance of the fabric without external force constraints.

[0004] Furthermore, existing testing methods are relatively cumbersome in operation and have low efficiency. Some high-precision testing equipment is also expensive, making it difficult to popularize in routine testing by small and medium-sized textile enterprises. To address the problems of single testing dimensions, distorted results, low quantification, and cumbersome operation in existing technologies, there is an urgent need to develop a feature acquisition device and method that is simple in structure, low in cost, and easy to operate. This device and method can achieve multi-dimensional quantitative acquisition of fabric stiffness and compression stiffness, and the test results should closely reflect the actual usage state of the fabric. Through the coordinated operation of multiple specification testing components, a fabric-specific stiffness / compression comprehensive characteristic curve and quantification vector can be formed, improving the accuracy, comprehensiveness, and practicality of fabric stiffness testing.

[0005] Therefore, a device and method for collecting comprehensive characteristics of fabric stiffness based on multi-pore circular rings are needed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a device and method for collecting comprehensive characteristics of fabric stiffness based on multi-pore circular rings, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a fabric stiffness comprehensive feature acquisition device based on multi-aperture circular rings, comprising a fabric sample fixing bracket, an upper magnet, a lower magnet, multiple sets of circular rings with different apertures, a scale, and a camera; the upper magnet is fixed to the top of the fabric sample fixing bracket, the multiple sets of circular rings with different apertures are sleeved on the fabric sample fixing bracket and can fall freely along the bracket, the lower magnet is arranged opposite to the upper magnet, and the circular fabric sample is clamped between the two by magnetic attraction, so that the fabric hangs naturally under its own gravity; the scale is vertically fixed to one side of the fabric sample fixing bracket, and its zero mark is flush with the clamping plane of the upper and lower magnets; the camera is set on the side of the fabric fixing component to record the falling process and the hanging height of the circular rings; through the mechanical interaction between the circular rings with different apertures and the naturally hanging fabric, comprehensive features reflecting both the bending stiffness and compressive stiffness of the fabric are obtained.

[0008] Furthermore, both the upper and lower magnets are cylindrical structures with a diameter of 1cm on the top and bottom surfaces and a height of 1cm. The identical specifications ensure uniform attraction between the two, achieving stable fixation of the fabric sample. The upper magnet is fixedly connected to the fabric sample fixing bracket by bolts or adhesive, and the load-bearing capacity at the connection point is sufficient to support the total weight of the circular fabric sample, the lower magnet, and multiple sets of rings with different apertures.

[0009] Furthermore, the diameter of the circular fabric sample is 5cm, which is a standard testing specification to ensure the consistency and comparability of the test results; the attraction between the upper and lower magnets is strong enough to ensure that the fabric sample and the multi-pore ring will not fall off during the test.

[0010] Furthermore, the inner diameters of the multiple sets of rings are 1.2cm, 1.4cm, 1.6cm and 1.8cm respectively, and the cross-sections of the four sets of rings are all circular with a diameter of 0.6cm. The four sets of rings are all made of nylon, and the material properties ensure that the rings do not undergo additional deformation and have uniform weight during the fall, thus avoiding interference with the test results.

[0011] Furthermore, the surfaces of all four sets of rings were rubbed with 50-grit sandpaper to give the rings a certain roughness. This treatment allows the rings to remain stably on the fabric sample during subsequent tests. The inner diameter of the four sets of rings is negatively correlated with the retention height. The larger the inner diameter of the ring, the easier it is to pass through the fabric sample, and the easier it is to record the retention height as zero.

[0012] Furthermore, the scale is a millimeter-precision scale, which is vertically fixed on one side of the fabric sample fixing bracket to achieve accurate reading and recording of the dwell height; the camera's shooting angle completely covers the natural drooping area of ​​the circular fabric sample, the effective scale area of ​​the scale, and the entire falling trajectory of multiple sets of rings, which can clearly record the dwell state, dwell height, and falling process of the standard rings on the circular fabric sample.

[0013] Furthermore, the fabric sample fixing bracket is made of stainless steel and has an overall L-shaped structure, including a vertical support rod and a horizontal base; the vertical support rod has a diameter of 0.8cm, a height of 15cm, and a smooth surface; the horizontal base has dimensions of 10cm×10cm and a thickness of 1cm to ensure the stability of the device.

[0014] Furthermore, both the upper and lower magnets are made of neodymium iron boron high-strength magnets with a magnetic strength of not less than 10N, ensuring that the fabric sample and the ring will not shift or fall off during the test.

[0015] Furthermore, the camera is a high-definition digital camera with a resolution of no less than 1080P and a frame rate of no less than 30fps, which can clearly capture the falling process and the stationary state of the ring.

[0016] The method for acquiring comprehensive fabric stiffness characteristics based on multi-pore circular rings, applied to any of the aforementioned fabric stiffness comprehensive feature acquisition devices based on multi-pore circular rings, includes the following steps:

[0017] Step 1: Assemble the device. Fix the upper magnet at the designated position on the fabric sample fixing bracket. Then, place multiple sets of rings with different apertures onto the fixing bracket in sequence, ensuring that the rings can fall freely along the bracket.

[0018] Step 2: Fix the fabric sample. Align the center of the circular fabric sample with the lower surface of the upper magnet. Use the attraction of the lower magnet to clamp the fabric sample between the upper and lower magnets, so that the fabric hangs down naturally under its own weight without any stretching or compression deformation.

[0019] Step 3: Ring drop test. Turn on the camera and start dynamic recording. Release multiple sets of rings with different apertures from the fixed support in sequence, allowing them to fall freely along the support to the fabric sample. Record the dwell state of each ring. If a ring stays on the fabric sample, read and record its dwell height on the scale (with the magnetic clamping plane as the zero reference). If a ring cannot stay and passes through the fabric sample, record its dwell height as zero.

[0020] Step 4: Comprehensive feature acquisition. Organize the inner diameter and corresponding retention height data of multiple sets of rings. Plot the relationship curve between the inner diameter of the rings as the abscissa and the retention height as the ordinate. This curve is the comprehensive characteristic curve of the fabric's stiffness / compression. At the same time, arrange the multiple sets of retention heights into an ordered vector according to the inner diameter of the rings from small to large. This vector is a quantitative index of the comprehensive characteristic of the fabric's stiffness / compression, which can be used for performance comparison analysis of different fabrics.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] This invention is the first to integrate fabric stiffness and compression stiffness into a comprehensive feature. By detecting four sets of circular rings with different aperture sizes, it simultaneously reflects the bending and compression properties of the fabric, solving the problem of the single detection dimension in traditional methods and providing more comprehensive feature extraction.

[0023] This invention uses magnetic attraction to hold the fabric sample, with the fixing point at the center of the circle and no stretching or squeezing deformation, so that the fabric is always in a natural hanging state for actual use, avoiding the distortion of results caused by clamping.

[0024] This invention can simultaneously generate a comprehensive characteristic curve of fabric stiffness / compression and a standardized quantitative vector, which can not only intuitively reflect the performance characteristics of the fabric, but also facilitate digital analysis and accurate comparison between different fabrics, thus solving the shortcomings of traditional qualitative evaluation.

[0025] The present invention has a simple structure, standardized component specifications, and low manufacturing cost, which is only a fraction of that of traditional high-precision detection equipment, making it very suitable for widespread application in small and medium-sized textile enterprises.

[0026] The present invention has a simple sampling method with no complicated professional operation required. Ordinary workers can complete the testing work independently after simple training. The testing efficiency is high and can meet the needs of large-scale and rapid testing.

[0027] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0029] Figure 2 This is a partial rear-view stereoscopic structural diagram of the present invention;

[0030] Figure 3 This is a schematic diagram showing the retention height of the circular fabric sample of the present invention;

[0031] Figure 4 This is a comparative schematic diagram of fabric samples of different materials according to the present invention;

[0032] Figure 5 This is a data table showing the retention height of cotton fabric samples on circular rings with different aperture sizes according to the present invention;

[0033] Figure 6 This is a schematic diagram of the overall process of the present invention.

[0034] In the diagram: 1. Fabric sample holder; 2. Upper magnet; 3. Lower magnet; 4. Circular fabric sample; 5. Ring; 6. Ruler; 7. Camera. Detailed Implementation

[0035] The present invention will be further described below with reference to embodiments.

[0036] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0037] Example 1

[0038] like Figure 1-6 As shown, this invention provides a device and method for collecting comprehensive characteristics of fabric stiffness based on multi-aperture circular rings. The device includes a fabric sample fixing bracket 1, an upper magnet 2, a lower magnet 3, four sets of circular rings 5 ​​with different apertures, a scale 6, and a camera 7. The upper magnet 2 is fixed to the top of the fabric sample fixing bracket 1. The four sets of circular rings 5 ​​with different apertures are fitted onto the fabric sample fixing bracket 1 and can fall freely along the bracket. The lower magnet 3 is arranged opposite to the upper magnet 2, and the circular fabric sample 4 is clamped between them by magnetic attraction, allowing the fabric to hang naturally under its own weight. The scale 6 is vertically fixed to one side of the fabric sample fixing bracket 1, and its zero mark is flush with the clamping plane of the upper magnet 2 and the lower magnet 3. The camera 7 is located on the side of the fabric fixing assembly and is used to record the falling process and the dwell height of the circular rings 5.

[0039] In this embodiment, the fabric is kept in a natural hanging state by using a magnetic clamping method. The comprehensive characteristics are obtained by the interaction between multiple sets of rings 5 ​​with different apertures and the fabric. This solves the problems of single detection dimension and distorted results in traditional methods, and can comprehensively and accurately characterize the comprehensive mechanical properties of the fabric.

[0040] Example 2

[0041] The difference between this embodiment and embodiment 1 is that it specifies in detail the specific specifications and fixing method of the upper magnet 2 and the lower magnet 3;

[0042] Both the upper magnet 2 and the lower magnet 3 are cylindrical structures with a diameter of 1 cm at the top and bottom surfaces and a height of 1 cm. Their identical design ensures uniform attraction, achieving stable fixation of the fabric sample 4. The upper magnet 2 is fixedly connected to the top of the vertical support rod of the fabric sample fixing bracket 1 using strong adhesive. The load-bearing capacity at the connection point is sufficient to support the total weight of the circular fabric sample 4, the lower magnet 3, and the four sets of rings 5 ​​with different apertures, ensuring structural stability of the device during the testing process.

[0043] In this embodiment, cylindrical magnets of the same specification ensure a uniform distribution of attractive force, preventing the fabric from deforming due to uneven force; the strong adhesive fixing method is simple and reliable, ensuring the structural stability of the device during the testing process and improving the accuracy and repeatability of the test results.

[0044] Example 3

[0045] The difference between this embodiment and embodiment 1 is that the standard specifications of the circular fabric sample 4 and the attraction requirements of the magnet are defined in detail.

[0046] The circular fabric sample 4 has a diameter of 5cm, which is a standard testing specification. During cutting, rough edges are removed to ensure a regular shape, free of wrinkles and damage, thus ensuring the consistency and comparability of the test results. Both the upper magnet 2 and the lower magnet 3 are made of neodymium iron boron magnets with a magnetic strength of not less than 10N. The attraction between them is strong enough to ensure that the fabric sample 4 and the multi-pore circular ring 5 will not fall off during the test.

[0047] In this embodiment, the standard diameter of 5cm ensures the comparability of test results between different fabric samples; a sufficiently large magnetic attraction ensures that the fabric sample and the ring 5 will not fall off during the test, avoiding test interruption and data loss, and improving the reliability of the test process.

[0048] Example 4

[0049] The difference between this embodiment and Embodiment 1 is that the specific specifications and materials of the four sets of rings 5 ​​are defined in detail;

[0050] The four sets of rings 5 ​​have inner diameters of 1.2cm, 1.4cm, 1.6cm, and 1.8cm, respectively, and all four sets of rings 5 ​​have circular cross-sections with a diameter of 0.6cm. All four sets of rings 5 ​​are made of nylon, and the material properties ensure that the rings 5 ​​do not undergo additional deformation and maintain uniform weight during descent, thus avoiding interference with the test results. The four sets of rings 5 ​​are sequentially fitted onto the vertical support rod of the fabric sample fixing bracket 1, and can slide freely along the support rod without jamming or tilting.

[0051] In this embodiment, different inner diameters can provide different gravity and contact areas, thereby obtaining performance information of the fabric under different stress states; the nylon material ensures that the ring 5 will not deform during the fall, and the weight is uniform, avoiding interference with the test results caused by the characteristics of the ring 5 itself, and improving the accuracy of the test results.

[0052] Example 5

[0053] The difference between this embodiment and Embodiment 1 is that it specifies in detail the surface treatment method of the ring 5 and the relationship between the inner diameter and the retention height;

[0054] The surfaces of all four sets of rings 5 ​​are treated with 50-grit sandpaper to give them a certain roughness. This treatment allows the rings 5 ​​to remain stably on the fabric sample 4 during subsequent tests. The inner diameter of the four sets of rings 5 ​​is negatively correlated with the retention height. The larger the inner diameter of the ring 5, the easier it is to pass through the fabric sample 4, and the easier it is to record the retention height as zero. The smaller the inner diameter, the easier it is for the ring 5 to remain on the fabric sample, and the more accurately the effective retention height can be recorded.

[0055] In this embodiment, the sandpaper friction treatment increases the surface roughness of the ring 5, enabling the ring 5 to remain more stably on the fabric sample, facilitating accurate reading of the retention height; the negative correlation between the inner diameter and the retention height provides a basis for subsequent data analysis and feature extraction, ensuring the regularity and reliability of the detection results.

[0056] Example 6

[0057] The difference between this embodiment and embodiment 1 is that it specifies the specific requirements for the scale 6 and the camera 7 in detail;

[0058] The ruler 6 is a stainless steel ruler with millimeter-level precision, 5cm in length, and is vertically attached to one side of the vertical support rod of the fabric sample fixing bracket 1. Its zero mark is flush with the lower surface of the upper magnet 2, enabling accurate reading and recording of the dwell height. The camera 7 is a high-definition digital camera with a resolution of no less than 1080P and a frame rate of no less than 30fps. It is set 30cm to the side of the fabric fixing component. Its shooting angle completely covers the natural drooping area of ​​the circular fabric sample 4, the 0-2.5cm scale area of ​​the ruler 6, and the entire falling trajectory of the four sets of rings 5, which can clearly record the dwell state, dwell height, and falling process of the standard rings 5 ​​on the circular fabric sample 4.

[0059] In this embodiment, the millimeter-precision scale 6 ensures accurate readings of the dwell height; the full shooting angle of the high-definition camera 7 ensures that the entire falling process and final dwell state of the ring 5 can be recorded, ensuring the authenticity and integrity of the detection data, and also facilitating subsequent data analysis and verification.

[0060] Example 7

[0061] like Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the specific steps of the fabric stiffness comprehensive feature acquisition method based on the above-mentioned device are described in detail.

[0062] The data acquisition method includes the following steps:

[0063] Step 1: Preliminary preparation and assembly of the device;

[0064] The upper magnet 2 is fixed to the top of the vertical support rod of the fabric sample fixing bracket 1 with strong adhesive, ensuring that the magnet is perpendicular to the support rod and the connection is firm; the millimeter-level ruler 6 is vertically pasted to one side of the fixing bracket, so that the zero mark of the ruler 6 is flush with the lower surface of the upper magnet 2; four sets of nylon rings 5 ​​with different apertures are sequentially placed on the vertical support rod of the fixing bracket, and it is checked whether the rings 5 ​​can slide freely along the support rod without jamming or tilting; the camera 7 is placed 30cm to the side of the device, and the shooting angle is adjusted so that the field of view of the camera 7 completely covers the natural drooping area of ​​the fabric sample 4, the 0-2.5cm scale area of ​​the ruler 6, and the falling trajectory of the rings 5 ​​on the support rod, and the camera 7 is adjusted to ensure that the picture is clear.

[0065] Step 2: Fixing the circular fabric sample 4;

[0066] Cut a circular cotton fabric sample with a diameter of 5cm, remove the rough edges, and ensure that the sample has a regular shape. Align the center of the fabric sample 4 with the center of the lower surface of the upper magnet 2, and attach the lower magnet 3 to the center of the upper surface of the fabric sample 4. Use the magnetic attraction between the upper and lower magnets to firmly clamp the fabric sample 4 between them, allowing the fabric sample 4 to hang naturally under its own weight. Check that the fabric sample 4 is not stretched, wrinkled, or shifted, and maintains a natural and relaxed hanging state.

[0067] Step 3: Drop test and data recording of the multi-aperture circular ring 5;

[0068] Turn on camera 7 and start continuous dynamic recording; first, release the nylon ring 5 with an inner diameter of 1.2cm naturally from the top of the support rod, allowing it to fall freely along the support rod to the fabric sample 4. When the ring 5 falls freely along the support to the fabric surface, its final dwell height is the result of the combined balance of the fabric bending deformation support force, the compression deformation support force, and the frictional force between the fabric and the ring 5 against the weight of the ring 5, satisfying the following mechanical equilibrium equation:

[0069]

[0070] in:

[0071] The weight of ring 5, in N, is determined by weighing ring 5 using an electronic balance and then applying the formula... The calculation yielded, where The mass of ring 5 is in kg. Let be the acceleration due to gravity, and take . ;

[0072] The vertical component of the fabric bending stiffness, measured in N, is the vertical component of the supporting force generated when the fabric undergoes bending deformation. Its magnitude is related to the bending stiffness of the fabric, the aperture of the ring 5, and the degree of fabric deformation.

[0073] : Vertical component of fabric compression stiffness, in N, is the vertical component of the supporting force generated when the fabric undergoes compression deformation. Its magnitude is related to the fabric's compression stiffness, the aperture of ring 5, and the degree of fabric deformation.

[0074] The frictional force between the fabric and the ring 5 is expressed in N. Its magnitude is related to the coefficient of friction between the ring 5 and the fabric, as well as the normal force.

[0075] Formula constraints:

[0076] 1. The fabric is a continuous, uniform, elastic thin sheet, and only small strain and large deflection deformation occur during the test;

[0077] 2. Ring 5 is a rigid body and undergoes no deformation during its descent;

[0078] 3. The friction between the fabric and ring 5 is considerable and cannot be ignored;

[0079] 4. The test process is free from external interference, and only the weight of the ring 5 itself is considered.

[0080] Formula control logic:

[0081] When the radius of ring 5 is small, the weight of ring 5 is small, and therefore the force exerted on the fabric sample is small. The supporting force exerted by the fabric sample on ring 5 is also small. Therefore, ring 5 can remain stably on the fabric sample. At this time, the vertical component of the fabric's bending stiffness... Vertical component of compressive stiffness Friction between the fabric and ring 5 Both are relatively small; when the radius of ring 5 is small When the ring increases, the gravity of ring 5 As the contact area between the fabric sample and the ring 5 increases, the fabric sample must have sufficient contact area to support the ring 5 so that the ring 5 can remain on the fabric sample. When the fabric sample and the ring 5 have sufficient contact area, the fabric bending reaction force... Compression reaction force and friction Talent and the gravity of ring 5 Mutual balance. When the support of the fabric sample for the ring 5 is insufficient, the ring 5 may slip off the fabric sample.

[0082] The overall effect achieved by the formula:

[0083] This mechanical equilibrium equation reveals the intrinsic relationship between the retention height of the ring 5 and the bending stiffness, compressive stiffness, and friction of the fabric. It is the theoretical basis for this invention to simultaneously collect the comprehensive characteristics of fabric stiffness and compression. By measuring the retention height of rings 5 ​​with different aperture sizes, information on the bending and compression performance of the fabric under different stress states can be indirectly obtained, thereby forming a comprehensive characteristic curve and quantification vector of the fabric.

[0084] The role of formulas in patents:

[0085] This formula is the core theoretical basis of this invention. It explains the working principle of the device and method of this invention and proves the scientific validity and rationality of obtaining the comprehensive characteristics of fabric stiffness / compression by measuring the retention height of the ring 5. At the same time, this formula also provides theoretical guidance for subsequent data analysis and feature extraction, ensuring the accuracy and reliability of the test results.

[0086] Observe the dwell state of ring 5. Ring 5 stays on the fabric sample. The dwell height on the scale 6 is recorded as 2.2cm through the image recorded by camera 7, and the data is recorded as (1.2cm, 2.2cm). Then, nylon rings 5 ​​with inner diameters of 1.4cm and 1.6cm are released in sequence, and their dwell heights are recorded as 1.8cm and 1.5cm respectively, and the data are recorded as (1.4cm, 1.8cm) and (1.6cm, 1.5cm). Finally, nylon ring 5 with an inner diameter of 1.8cm is released. This ring 5 cannot stay on the fabric sample and falls directly through the fabric sample. Its dwell height is recorded as 0, and the data is recorded as (1.8cm, 0). The entire test process is guaranteed to be free from external interference, and the rings 5 ​​fall naturally. The test is repeated 3 times, and the average dwell height is taken as the final test data to improve the reliability of the data.

[0087] Step 4: Obtaining the combined characteristics of fabric stiffness / compression;

[0088] Plot the data points in a rectangular coordinate system with the inner diameter of ring 5 as the x-axis (unit: cm) and the retention height as the y-axis (unit: cm), and connect them to form a smooth curve. This curve is the stiffness / compression characteristic curve of the cotton fabric. The curve shows an overall downward trend, which intuitively reflects the negative correlation between the fabric aperture and the retention height. At the same time, the four sets of retention heights are arranged into an ordered vector in ascending order of the inner aperture of ring 5: (2.2, 1.8, 1.5, 0). This vector is a quantitative index of the stiffness / compression characteristic of the cotton fabric and can be directly used for comparative analysis with other fabrics.

[0089] In this embodiment, the steps are clear and the operation is simple. No complicated professional operation is required. Ordinary workers can complete the testing work independently after simple training. By dynamically recording the falling process and the state of the ring 5, the performance of the fabric under dynamic stress can be truly reflected, making the test results more consistent with the actual use scenario.

[0090] Example 8

[0091] The difference between this embodiment and Embodiment 1 is that it describes in detail the method for adjusting the number of rings 5 ​​under different accuracy requirements and the detection process for fabrics of different materials;

[0092] When the accuracy requirement for the test results is not particularly high, the number of rings 5 ​​can be reduced accordingly, for example, by using only two or three sets of rings 5. If three sets of rings 5 ​​are used, three sets of nylon rings 5 ​​with inner diameters of 1.2cm, 1.5cm, and 1.8cm can be selected for testing. The test results are as follows: the retention height of the ring 5 with an inner diameter of 1.2cm is 2.2cm, the retention height of the ring 5 with an inner diameter of 1.5cm is 1.6cm, and the retention height of the ring 5 with an inner diameter of 1.8cm is 0. The stiffness / compression comprehensive characteristic curve of the fabric is plotted, forming a comprehensive characteristic quantization vector: (2.2, 1.6, 0). Although the detail of the characteristic curve and quantization vector obtained by using three sets of rings 5 ​​is not as rich as that of four sets of rings 5, it can still basically reflect the stiffness / compression comprehensive performance of the fabric, meet general testing needs, and further simplify the operation process and improve testing efficiency.

[0093] For other types of textile fabrics such as silk, synthetic fibers, and wool, the same testing steps can be followed, only requiring the replacement of the corresponding circular fabric sample 4. For example, for the silk fabric sample, the test results are as follows: the retention height of the ring 5 with an inner diameter of 1.2cm is 1.5cm, the retention height of the ring 5 with an inner diameter of 1.4cm is 0.8cm, and the rings 5 ​​with inner diameters of 1.6cm and 1.8cm cannot be retained, with a retention height of 0. The stiffness / compression characteristic curve of the silk fabric is plotted, and its downward trend is steeper than that of cotton fabric, forming a comprehensive characteristic quantization vector: (1.5, 0.8, 0, 0). By comparing the characteristic curve and quantization vector with those of cotton fabric, it can be clearly seen that the stiffness and compression stiffness of silk fabric are lower than those of cotton fabric, and its drape is better, making it more suitable for making dresses, scarves, and other clothing and accessories that require good drape.

[0094] In this embodiment, the user can select the appropriate number of rings 5 ​​according to actual needs to achieve a balance between detection accuracy and detection efficiency; the present invention is applicable to the detection of various textile fabrics and has a wide range of applications.

[0095] The working principle and usage of this invention are as follows: This invention is based on the following reasonable assumptions: the fabric is a continuous, uniform, elastic thin plate, and only small strain and large deflection deformation occur during the test; the ring 5 is a rigid body and undergoes no deformation during the fall; the frictional force between the fabric and the ring 5 is considerable and cannot be ignored; there is no external force interference during the test, and only the weight of the ring 5 itself is considered. The core principle of this invention is to obtain a comprehensive characteristic that simultaneously reflects the bending stiffness (rigidity) and compressive stiffness of the fabric through the mechanical interaction between the rings 5 ​​with different apertures and the naturally draping fabric. When the ring 5 falls freely along the support to the fabric surface, its final retention height is the result of the fabric bending deformation support force, compressive deformation support force, and the frictional force between the fabric and the ring 5 balancing the weight of the ring 5.

[0096] In use, the device is first assembled and the fabric sample is fixed according to the steps in Example 7. Then, rings 5 ​​with different apertures are released sequentially. The falling process and dwell height of the rings 5 ​​are recorded by camera 7. Finally, a comprehensive feature curve is plotted and a quantization vector is formed based on the recorded data. This invention can be applied to multiple scenarios such as clothing fabric selection, fabric quality inspection, and fabric research and development improvement. In the clothing fabric selection scenario, designers can select the most suitable fabric for a specific style by comparing the comprehensive feature curves and quantization vectors of different fabrics. In the fabric quality inspection scenario, companies can promptly identify batches with quality abnormalities by comparing the characteristics of the fabric to be tested with the characteristics of standard samples.

[0097] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fabric stiffness comprehensive feature acquisition device based on multi-pore circular rings, characterized in that, The device includes a fabric sample holder (1), an upper magnet (2), a lower magnet (3), multiple sets of rings (5) with different apertures, a scale (6), and a camera (7). The upper magnet (2) is fixed to the top of the fabric sample holder (1). The multiple sets of rings (5) with different apertures are fitted onto the fabric sample holder (1) and can fall freely along the holder. The lower magnet (3) is arranged opposite to the upper magnet (2), and the circular fabric sample (4) is clamped between the two magnets by magnetic attraction. Between the two, the fabric hangs naturally under its own weight; the scale (6) is vertically fixed to one side of the fabric sample fixing bracket (1), and its zero mark is flush with the clamping plane of the upper magnet (2) and the lower magnet (3); the camera (7) is set on the side of the fabric fixing assembly to record the falling process and the dwell height of the ring (5); through the mechanical interaction between the ring (5) with different aperture and the naturally hanging fabric, the comprehensive characteristics that simultaneously reflect the bending stiffness and compression stiffness of the fabric are obtained.

2. The fabric stiffness comprehensive feature acquisition device based on multi-pore circular rings according to claim 1, characterized in that, Both the upper magnet (2) and the lower magnet (3) are cylindrical structures with a diameter of 1 cm on the top and bottom surfaces and a height of 1 cm. The same specifications ensure that the attraction between the two is uniform, thus achieving stable fixation of the fabric sample (4). The upper magnet (2) is fixedly connected to the fabric sample fixing bracket (1) by bolts or adhesive. The load-bearing capacity of the connection position is sufficient to bear the total weight of the circular fabric sample (4), the lower magnet (3), and multiple sets of rings (5) with different apertures.

3. The fabric stiffness comprehensive feature acquisition device based on multi-pore circular rings according to claim 1, characterized in that, The diameter of the circular fabric sample (4) is 5cm, which is a standard testing specification to ensure the consistency and comparability of the test results; the attraction between the upper magnet (2) and the lower magnet (3) is large enough to ensure that the fabric sample (4) and the porous ring (5) will not fall off during the test.

4. The fabric stiffness comprehensive feature acquisition device based on multi-pore circular rings according to claim 1, characterized in that, The inner diameters of the multiple sets of rings (5) are 1.2cm, 1.4cm, 1.6cm and 1.8cm respectively. The cross-sections of the four sets of rings (5) are all circular with a diameter of 0.6cm. The material of the four sets of rings (5) is nylon. The material properties ensure that the rings (5) have no additional deformation and uniform weight during the fall, thus avoiding interference with the test results.

5. The fabric stiffness comprehensive feature acquisition device based on multi-pore circular rings according to claim 1, characterized in that, The surfaces of the four sets of rings (5) are all rubbed with 50-grit sandpaper to give the surface of the rings (5) a certain roughness. This treatment allows the rings (5) to remain stably on the fabric sample in subsequent tests. The inner diameter of the four sets of rings (5) is negatively correlated with the retention height. The larger the inner diameter of the rings (5), the easier it is to pass through the fabric sample and the easier it is to record the retention height as zero.

6. The fabric stiffness comprehensive feature acquisition device based on multi-pore circular rings according to claim 1, characterized in that, The scale (6) is a millimeter-precision scale (6), which is vertically fixed on one side of the fabric sample fixing bracket (1) to achieve accurate reading and recording of the dwell height; the shooting angle of the camera (7) completely covers the natural drooping area of ​​the circular fabric sample (4), the effective scale area of ​​the scale (6) and the entire falling trajectory of multiple sets of rings (5), and can clearly record the dwell state, dwell height and falling process of the standard ring (5) on the circular fabric sample (4).

7. The fabric stiffness comprehensive feature acquisition device based on multi-pore circular rings according to claim 1, characterized in that, The fabric sample fixing bracket (1) is made of stainless steel and has an overall L-shaped structure, including a vertical support rod and a horizontal base; the vertical support rod has a diameter of 0.8cm, a height of 15cm, and a smooth surface; the horizontal base has a size of 10cm×10cm and a thickness of 1cm to ensure that the device is placed stably.

8. The fabric stiffness comprehensive feature acquisition device based on multi-pore circular rings according to claim 1, characterized in that, Both the upper magnet (2) and the lower magnet (3) are made of neodymium iron boron strong magnets with a magnetic strength of not less than 10N, to ensure that the fabric sample and the ring (5) will not be displaced or fall off during the test.

9. The fabric stiffness comprehensive feature acquisition device based on a multi-pore circular ring according to claim 1, characterized in that, The camera (7) is a high-definition digital camera (7) with a resolution of not less than 1080P and a frame rate of not less than 30fps, which can clearly capture the falling process and the lingering state of the ring (5).

10. A method for acquiring comprehensive fabric stiffness characteristics based on multi-pore circular rings, applied to the fabric stiffness comprehensive characteristic acquisition device based on multi-pore circular rings as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Assemble the device. Fix the upper magnet (2) at the designated position on the fabric sample fixing bracket (1). Place multiple sets of rings (5) with different apertures on the fixing bracket in sequence to ensure that the rings (5) can fall freely along the bracket. Step 2: Fix the fabric sample. Align the center of the circular fabric sample (4) with the lower surface of the upper magnet (2). Use the attraction of the lower magnet (3) to clamp the fabric sample between the upper and lower magnets, so that the fabric hangs down naturally under its own weight without any stretching or compression deformation. Step 3: Ring (5) drop test. Turn on the camera (7) and start dynamic recording. Release multiple rings (5) with different apertures from the fixed support in sequence and let them fall freely along the support to the fabric sample. Record the dwell state of each ring (5). If the ring (5) stays on the fabric sample, read and record its dwell height on the scale (6). If the ring (5) cannot stay and passes through the fabric sample, record its dwell height as zero. Step 4: Comprehensive feature acquisition, sort out the inner diameter and corresponding retention height data of multiple sets of rings (5), draw the relationship curve between the two, and form an ordered vector as the comprehensive feature of the stiffness / compression of the fabric.

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