Orthogonal bidirectional detection device and method for fabric conformality

Abstract

The present invention relates to the field of textile performance testing, and specifically to an orthogonal bidirectional testing device and method for fabric conformality. The device includes a pressurizing structure, a positioning structure, and a recording structure. The pressurizing structure includes a pressurizer, a pressure plate, and a sample lifting rod; the positioning structure includes a horizontal slide rail, an adjustable tilting plate, a vertical slide rail, a clamping plate, and a clamping slide rail; and the recording structure is a camera. The pressurizer is placed on a horizontal guide rail and moves along the horizontal guide rail to the center of the sample width. The clamping plate is located at the clamping end of the adjustable tilting plate and moves back and forth along it to ensure that the sample lifting rod lifts the length center of the sample. The present invention utilizes the pressurizing structure and the positioning structure of the device to cooperate to complete the folding of the fabric sample, and utilizes the recording structure and computer technology to realize dynamic detection and analysis of the sample, thereby achieving the purpose of in-situ detection of the wrinkle recovery of the fabric, realizing contactless folding of the sample throughout the process and real-time detection and analysis, which can improve the objectivity and accuracy of the test results.

Description

Technical Field

[0001] The present invention belongs to the field of textile performance testing, and in particular relates to an orthogonal bidirectional testing device and method for fabric conformality. Background Art

[0002] Currently, fabric wrinkle recovery is primarily measured using a vertical method using wrinkle recovery angle testing machines such as the SDL-M003A. This experimental process is subject to numerous errors, including, but not limited to, the formation of hairiness after trimming the fabric sample, uneven pressure applied when clamping the sample, uncontrolled air pressure during sample transfer, and human error in the final data reading. Furthermore, this test requires full, phased human involvement, making it suitable only for testing small batches of samples, presenting significant limitations. Summary of the Invention

[0003] In light of this, the present invention aims to provide an orthogonal, bidirectional testing device and method for fabric conformality. This device enables in-situ testing of sample folding and fabric wrinkle recovery, eliminating the sample transfer step required in traditional testing methods and improving testing efficiency. Furthermore, the device provides test data in both horizontal and vertical directions, providing an effective foundation for objective and dynamic testing of fabric wrinkle recovery.

[0004] The technical solution of the present invention:

[0005] A device for orthogonal, bidirectional testing of fabric conformality comprises a pressurizing structure, a positioning structure, and a recording structure. The pressurizing structure is located above the positioning structure, with a pressurizer connected to the positioning structure via a horizontal guide rail. The recording structure, located above and behind the positioning structure, records sample data.

[0006] The pressurizing mechanism comprises a pressurizer, a pressure plate, and a specimen lifter. The pressurizer is mounted on a clamping rail and moves along it to ensure pressure is applied at the center of the specimen's width. The pressure plate is located on one side of the pressurizer and is connected to the specimen lifter, moving vertically with the lifter. After the lifter raises the specimen to a set height, the pressurizer activates, applying pressure to the specimen between it and the pressure plate.

[0007] The positioning structure includes a horizontal guide rail, an adjustable tilting plate, a vertical slide rail, a clamping plate and a clamping slide rail. The clamping slide rail is embedded in the narrow end of the adjustable tilting plate and is connected to the clamping plate. Both sides of the narrow end of the adjustable tilting plate are connected to the vertical slide rails, and the horizontal guide rail is located directly above the waist-shaped hole on the adjustable tilting plate. The clamping plate is used to fix one end of the specimen so that it moves along the direction of the vertical slide rail with the clamping end of the adjustable tilting plate to adjust the inclination angle of the specimen. The clamping plate can move back and forth along the adjustable tilting plate to ensure that the specimen lifting rod lifts the length center of the specimen. The clamping slide rail is located on the adjustable tilting plate, and the clamping plate can move along it.

[0008] The recording structure is a camera, which is used to capture and record the moving distance and start and end time of the unfixed side of the sample on one side of the adjustable tilting plate.

[0009] This device can detect fabric samples in two different states: horizontal and vertical, and includes the following steps:

[0010] When the fabric sample is in a horizontal state:

[0011] Step 1: When the device is in the initial state, place the sample horizontally on the adjustable tilt plate, with one end clamped and fixed by the clamping plate.

[0012] Step 2: Move the clamping plate back and forth along the clamping slide rail so that the center of the specimen length is located on the specimen lifting rod.

[0013] Step 3: The clamping end of the adjustable tilting plate moves along the vertical slide rail to a set height to form a certain tilt angle.

[0014] Step 4: Move the presser along the horizontal guide rail to the center of the sample width. The presser starts to pressurize, and the pressure plate retracts, so that the sample is subjected to uniform pressure between the presser and the pressure plate for a certain period of time.

[0015] Step 5: The pressurizer starts and stops pressurizing, the pressure plate pops open, and the sample lifting rod is quickly retracted in the vertical direction.

[0016] Step 6: The specimen is allowed to fall naturally without support, and its unsecured edge moves along the adjustable tilting plate. The camera records the distance the unsecured edge moves on the adjustable tilting plate and the start and end times.

[0017] Step 7: Connect the camera to the computer to process and analyze the images in real time.

[0018] When the fabric sample is in a vertical position:

[0019] Step 1: The device is in the initial state. Place the sample vertically on the adjustable tilt plate, with one end clamped and fixed by the clamping plate.

[0020] Step 2: Move the clamping plate back and forth along the clamping slide rail so that the center of the specimen length is located on the specimen lifting rod.

[0021] Step 3: The clamping end of the adjustable tilting plate moves along the vertical slide rail to a set height to form a certain tilt angle.

[0022] Step 4: Move the presser along the horizontal guide rail to the center of the sample width. The presser starts to pressurize and the pressure plate retracts, so that the sample is subjected to uniform pressure between the presser and the pressure plate for a certain period of time.

[0023] Step 5: The pressurizer stops applying pressure, the pressure plate pops open, and the sample lifting rod is quickly retracted in the horizontal direction.

[0024] Step 6: The specimen is allowed to fall naturally without support, and its unsecured edge moves along the adjustable tilting plate. The camera records the distance the unsecured edge moves on the adjustable tilting plate and the start and end times.

[0025] Step 7: Connect the camera to the computer to process and analyze the images in real time.

[0026] Beneficial effects of the present invention:

[0027] This device enables in-situ testing of sample folding and fabric wrinkle recovery, eliminating the sample transfer step required in traditional testing methods and improving testing efficiency. By utilizing image processing technology and camera-based detection of sample edges, testing efficiency is enhanced, resulting in more objective and accurate results. It can also measure the conformality of fabric samples in both vertical and horizontal positions, providing a more comprehensive solution for fabric wrinkle recovery testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A structural perspective diagram of the sample folding device of the present invention;

[0029] Figure 2 A side view of the structure of the sample folding device of the present invention;

[0030] Figure 3 This is a real-time image collected by the sample folding device of the present invention during the experiment;

[0031] Figure 4 This is a schematic diagram of a binary image obtained by processing the sample folding device of the present invention during the experiment;

[0032] Figure 5 This is an experimental data diagram when the fabric sample is in a horizontal state in a specific implementation case;

[0033] Figure 6 This is a graph of experimental data when the fabric sample is in a vertical state in a specific implementation case.

[0034] In the figure: 1 pressurizer; 2 horizontal guide rail; 3 pressure plate; 4 adjustable tilt plate; 5 sample lifting rod; 6 vertical slide rail; 7 clamping plate; 8 camera; 9 clamping slide rail. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and technical solutions.

[0036] A device for detecting the conformality of fabrics in an orthogonal and bidirectional manner, comprising the following structures:

[0037] The pressurizing mechanism consists of a pressurizer 1, a pressure plate 3, and a specimen lifter 5. The pressurizer 1 is placed on a horizontal guide rail 2 and can move along it to ensure that pressure is applied at the center of the specimen's width. The pressure plate 3 moves vertically with the specimen lifter 5. After the specimen lifter 5 raises the specimen to the set height, the pressurizer 1 is activated, applying pressure between it and the pressure plate 3. The pressurizing mechanism applies a pressure of 20 to 50 N for 1 to 5 minutes.

[0038] The positioning structure is composed of a horizontal guide rail 2, an adjustable inclined plate 4, a vertical slide rail 6, a clamping plate 7, and a clamping slide rail 9. The clamping plate 7 is located at the clamping end of the adjustable inclined plate 4 and is used to fix one end of the sample so that it moves along the vertical slide rail 6 with the clamping end of the adjustable inclined plate 4 to adjust the inclination angle of the sample. The clamping plate 7 can move back and forth along the adjustable inclined plate 4 to ensure that the sample lifting rod 5 lifts the length center of the sample. The clamping slide rail 9 is located on the adjustable inclined plate 4, and the clamping plate 7 can move along it. The clamping height is the distance that the sample lifting rod 5 moves in the vertical direction, and the adjustment range is between 0 and 8 cm. The support height is the distance that the adjustable inclined plate 4 moves along the vertical slide rail 6, and the adjustment range is between 0 and 5 cm. The size of the fabric sample is controlled within the range of 14*30 cm.

[0039] The recording structure, namely the camera 8 , is used to capture and record the moving distance and start and end time of the unfixed side of the sample on one side of the adjustable tilting plate 4 .

[0040] A device and method for detecting the conformability of fabrics in an orthogonal, bidirectional manner (the fabric is in a horizontal state) is used, comprising the following steps:

[0041] Step 1: The device is in the initial state, and the sample is placed horizontally on the adjustable tilting plate 4, with one end clamped and fixed by the clamping plate 7.

[0042] Step 2: The clamping plate 7 moves forward and backward along the clamping slide rail 9 so that the center of the sample length is located on the sample lifting rod 5.

[0043] Step 3: The clamping end of the adjustable tilting plate 4 moves along the vertical slide rail 6 to a set height to form a certain tilt angle.

[0044] Step 4: Move the pressurizer 1 to the center of the sample width along the horizontal guide rail 2. The pressurizer 1 starts to pressurize, and the pressing plate 3 retracts, so that the sample is subjected to uniform pressure between the pressurizer 1 and the pressing plate 3 for a certain period of time.

[0045] Step 5: The pressurizer 1 stops pressurizing, the pressure plate 3 pops open, and the sample lifting rod 5 is quickly retracted in the vertical direction.

[0046] Step 6: The sample falls naturally without support, and its unfixed edge moves along the adjustable tilting plate 4. The camera 8 records the moving distance and start and end time of the unfixed edge on the adjustable tilting plate 4.

[0047] Step 7: Connect camera 8 to the computer to view the image ( Figure 3 ) for real-time processing and analysis. The collected data were processed by algorithm using MATLAB program.

[0048] The processing algorithm is divided into two steps, as follows:

[0049] Step 1: Real-time binarization of the captured video: Use the built-in function im2bw in Matlab to perform binarization operations. In order to ensure timeliness, the threshold selection during binarization is automatically obtained using the graythresh function. The image is obtained as follows Figure 4 shown.

[0050] Step 2: Perform real-time pixel calculation on the obtained binary video. The formula used is as follows:

[0051] [M,N]=size(A);

[0052] white=sum(sum(A)) / (M*N);

[0053] In Matlab, we first perform a sum operation on the obtained image. Since the image has been binarized, the sum is actually the number of pixels with a value of 1, that is, the number of white pixels. Then, we divide it by the total number of pixels to get the proportion of white pixels.

[0054] During the movement of the fabric, the change in the proportion of white pixels after binarization in the entire image, that is, the change in area during the fabric recovery process, is calculated in real time. The fabric's conformal performance can be determined by the rate of change.

[0055] Specific implementation cases:

[0056] This experiment uses cotton and linen cloth with a size of 9*20 (cm) as experimental samples, and the samples are tested in two different states: horizontal and vertical.

[0057] The experimental data and results of the fabric sample in a horizontal state are as follows:

[0058] Table 1:

[0059]

[0060] According to Table 1 and Figure 5The results show that, under the same experimental conditions, after the pressurization was completed (i.e., in the initial state), the cotton sample had a higher proportion of white pixels than the linen sample. Camera recordings show that the cotton sample moved much faster and farther than the linen sample. This means that the change in the proportion of white pixels in the cotton sample was greater than that in the linen sample over the same period of time. Data processing reveals that the rate of change in the proportion of white pixels in the cotton sample was faster than that in the linen sample. This comprehensive comparison demonstrates that the cotton sample retains its shape better than the linen sample.

[0061] The experimental data and results of the fabric sample in the vertical state are as follows:

[0062] Table 2:

[0063]

[0064] According to Table 2 and Figure 6 The results show that, under the same experimental conditions, after the pressurization was completed (i.e., in the initial state), the cotton sample had a higher proportion of white pixels than the linen sample. Camera recordings show that the cotton sample moved much faster and farther than the linen sample. This means that the change in the proportion of white pixels in the cotton sample was greater than that in the linen sample over the same period of time. Data processing reveals that the rate of change in the proportion of white pixels in the cotton sample was faster than that in the linen sample. This comprehensive comparison demonstrates that the cotton sample retains its shape better than the linen sample.

[0065] By combining the experimental data in both horizontal and vertical states and comparing the change in the proportion of white pixels within 0.3s, the shape retention of the fabric can be evaluated more intuitively. The following comprehensive evaluation indicators can be given:

[0066] The change in the proportion of white pixels over a given period of time represents the fabric's rate of change. Samples with a white pixel ratio change of less than 15% exhibit poor shape retention, while samples with a white pixel ratio change between 15% and 28% exhibit good shape retention.

Claims

1. A device for orthogonal bidirectional detection of fabric conformality, characterized in that: The device comprises a pressurizing structure, a positioning structure and a recording structure; the pressurizing structure is located above the positioning structure, and a pressurizer (1) in the pressurizing structure is connected to the positioning structure via a horizontal guide rail (2); the recording structure is located above and behind the positioning structure and is used to record sample data; The pressurizing structure comprises a pressurizer (1), a pressure plate (3) and a sample lifting rod (5); the pressurizer (1) is placed on a clamping slide rail (9) and can move along the clamping slide rail (9) to ensure that pressure is applied at the center of the sample width; the pressure plate (3) is located on one side of the pressurizer (1), the pressure plate (3) is connected to the sample lifting rod (5), and the pressure plate (3) moves in a vertical direction along with the sample lifting rod (5); after the sample lifting rod (5) lifts the sample to a set height, the pressurizer (1) is started, so that the sample is subjected to pressure between the pressurizer and the pressure plate (3); The positioning structure comprises a horizontal guide rail (2), an adjustable tilting plate (4), a vertical slide rail (6), a clamping plate (7) and a clamping slide rail (9); the clamping slide rail (9) is embedded in the narrow end of the adjustable tilting plate (4) and is connected to the clamping plate (7); both sides of the narrow end of the adjustable tilting plate (4) are connected to the vertical slide rails (6), and the horizontal guide rail (2) is located directly above the waist-shaped hole on the adjustable tilting plate (4); the clamping plate (7) is used to fix one end of the sample so that it moves along the vertical slide rail with the clamping end of the adjustable tilting plate (4) to adjust the tilt angle of the sample; the clamping plate (7) can move forward and backward along the adjustable tilting plate (4) to ensure that the sample lifting rod (5) lifts the length center of the sample; the clamping slide rail (9) is located on the adjustable tilting plate (4), and the clamping plate (7) can move along it; The recording structure is a camera (8), which is used to capture and record the moving distance and start and end time of the unfixed side of the sample on one side of the adjustable tilting plate (4).

2. The detection method of a fabric conformality orthogonal bidirectional detection device according to claim 1, characterized in that: The following steps are involved: When the fabric sample is in a horizontal state: Step 1: The device is in the initial state, and the sample is placed horizontally on the adjustable tilting plate (4), with one end clamped and fixed by the clamping plate (7); Step 2: Move the clamping plate back and forth along the clamping slide rail so that the center of the sample length is located on the sample lifting rod; Step 3: The clamping end of the adjustable tilting plate (4) moves along the vertical slide rail (6) to a set height to form a certain tilt angle; Step 4: Move the pressurizer along the horizontal guide rail (2) to the center of the sample width; start the pressurizer (1) to apply pressure, and retract the pressure plate (3), so that the sample is subjected to uniform pressure between the pressurizer (1) and the pressure plate (3) for a certain period of time; Step 5: The pressurizer (1) starts and stops pressurizing, the pressure plate (3) pops open, and the sample lifting rod (5) is quickly retracted in the vertical direction; Step 6: The sample falls naturally without support, and its unfixed edge moves along the adjustable tilting plate; the camera (8) records the moving distance and start and end time of the unfixed edge on the adjustable tilting plate; Step 7: The camera (8) is connected to a computer to process and analyze the images in real time.

3. The detection method of a fabric conformality orthogonal bidirectional detection device according to claim 1, characterized in that: The following steps are involved: When the fabric sample is in a vertical position: Step 1: The device is in the initial state, and the sample is placed vertically on the adjustable tilting plate (4), with one end clamped and fixed by the clamping plate (7); Step 2: The clamping plate (7) moves forward and backward along the clamping slide rail so that the center of the sample length is located on the sample lifting rod (5); Step 3: The clamping end of the adjustable tilting plate (4) moves along the vertical slide rail to a set height to form a certain tilt angle; Step 4: Move the pressurizer (1) along the horizontal guide rail (2) to the center of the sample width; the pressurizer (1) starts to pressurize, and the pressing plate (3) retracts, so that the sample is subjected to uniform pressure between the pressurizer (1) and the pressing plate (3) for a certain period of time; Step 5: The pressurizer (1) stops pressurizing, the pressure plate (3) pops open, and the sample lifting rod (5) is quickly retracted in the horizontal direction; Step 6: The sample falls naturally without support, and its unfixed edge moves along the adjustable tilting plate (4); the camera (8) records the moving distance and start and end time of the unfixed edge on the adjustable tilting plate (4); Step 7: The camera (8) is connected to a computer to process and analyze the images in real time.

Images