A device and method for accurately measuring fabric wicking height

Abstract

The present invention discloses a device and method for accurately measuring the wicking height of a fabric. The device and method fully consider the influence of fabric thickness on the wicking height. Electrodes are inserted and buried in a fabric sample to be measured along the thickness direction to form a rectangular electrode array on the surface of the fabric sample to be measured, ensuring that the electrodes can contact capillary water adsorbed by the internal structure of the fabric sample to be measured. Four electrodes that are adjacent to each other and arranged in sequence along the horizontal direction in the rectangular electrode array are selected by an electrode converter as a positive power supply electrode, a positive measuring electrode, a negative measuring electrode and a negative power supply electrode, so that a large number of densely distributed detection points are formed on the surface of the fabric sample to be measured. The resistivity change of each detection point when the fabric sample to be measured is dry and after the lower end of the fabric sample to be measured is detected by a resistance method to measure the wicking height. Therefore, the device and method are not affected by the thickness, color and structure of the fabric sample to be measured, and have the advantage of high wicking height measurement accuracy.

Description

Technical Field

[0001] The present invention relates to a fabric detection device and method, in particular to a fabric wicking height precision measurement device and method. Background Art

[0002] Wicking height measurement is an important item for evaluating the capillary effect and moisture absorption of fabrics. In the prior art, the main methods for measuring fabric wicking height are: direct reading method, image recognition method and algorithm prediction method.

[0003] The direct reading method involves immersing the lower end of the fabric in liquid and measuring the height of the liquid rising from the fabric surface using a graduated ruler to determine the wicking height. The textile industry standard "FZ / T 01071-2008 Test Method for Wicking of Textiles" discloses how to implement the direct reading method. However, the direct reading method suffers from the following issues: it relies heavily on the operator's skill, making it highly inaccurate for fabrics with complex structures or dark colors, and the results are also affected by the operator's proficiency.

[0004] The image recognition method involves immersing the lower end of the fabric in liquid, capturing an image of the fabric surface using an image acquisition device, and then using an image processing program to identify the image and determine the wicking height. The "SN / T 4667-2016 Dynamic Test Method for Determination of Capillary Effect of Textiles for Import and Export" discloses implementation of this method. However, a problem with this method is that the results are affected by the fabric's structure and color.

[0005] Algorithmic prediction methods measure the electrical properties of fabrics and then calculate the fabric's wicking height using a known algorithm. Chinese utility model patent publication number CN211402048U discloses a device for measuring the wicking height of textiles based on capacitance, which measures changes in the fabric's capacitance. However, this method suffers from the following issues: Because various factors, such as fabric structure, fiber type, and oil, affect wicking height, algorithms that characterize the relationship between electrical properties and wicking height for different fabrics generally differ. Developing an algorithm tailored to the fabric requires significant resources and time, and the wicking height predictions obtained using these algorithms often exhibit significant errors.

[0006] The above existing fabric wicking height measurement method has the following shortcomings:

[0007] The existing direct reading method, image recognition method and algorithm prediction method measure the wicking height by treating the fabric as a thin film. In fact, the thickness of the fabric, especially the thick and plush fabric, cannot be ignored. That is, after the lower end of the fabric is immersed in liquid, the capillary water formed by the wicking effect of the fabric absorbing the liquid dynamically migrates and diffuses in the three-dimensional directions of the fabric, namely the length, width and thickness. When the internal structure of the fabric has absorbed the capillary water but the surface of the fabric has not been completely soaked, the direct reading method and the image recognition method cannot detect the accurate wicking height from the surface of the fabric, and the algorithm prediction method does not have an existing algorithm model that can predict the wetness state of the fabric in the three-dimensional direction. Summary of the Invention

[0008] One of the technical problems to be solved by the present invention is to provide a device for accurately measuring the wicking height of a fabric, so as to solve the problem that the existing method for measuring the wicking height of a fabric does not take the influence of the fabric thickness into consideration, resulting in insufficient measurement accuracy of the wicking height.

[0009] To solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0010] A device for accurately measuring the wicking height of a fabric comprises a fabric hanging system, a water tank, and a wicking height measuring system; the fabric hanging system can flatten a fabric sample to be measured on a vertical plane, and the water tank contains a test liquid;

[0011] Its characteristics are:

[0012] The wicking height measurement system includes X*Z electrodes, an electrode converter, a control device, a DC power supply and a voltage measuring device;

[0013] Each electrode is inserted and embedded in the fabric sample along the thickness direction of the fabric sample being tested, and all electrodes are equidistantly arranged on the surface of the fabric sample to form a rectangular electrode array with X columns and Z rows, with the rows and columns of the rectangular electrode array oriented horizontally and vertically, respectively. The cross-sectional dimensions of the electrodes should be sufficiently small to allow the electrodes to be inserted and embedded in the fabric sample along the thickness direction of the fabric sample being tested. The spacing between two adjacent electrodes should be sufficiently small to meet the accuracy requirements for measuring the wicking height of the fabric sample being tested. The smaller the spacing between two adjacent electrodes, the higher the accuracy of the wicking height obtained. However, the spacing between two adjacent electrodes should be maintained at a certain distance to avoid mutual interference between the electrodes. Furthermore, depending on the thickness of the fabric sample being tested, the electrodes can penetrate the fabric sample in the thickness direction or only be inserted to a certain depth in the thickness direction of the fabric sample being tested, as long as the electrodes can contact the capillary water adsorbed by the internal structure of the fabric sample being tested.

[0014] The X*Z electrodes are electrically connected to the cable socket of the electrode converter through a cable. The electrode converter is provided with four terminals, namely, a positive power supply terminal, a negative power supply terminal, a positive measuring terminal and a negative measuring terminal. The control device can control the electrode converter to electrically connect the four terminals to any four of the X*Z electrodes respectively. This function of the electrode converter can be realized by a relay. The positive and negative poles of the DC power supply can be electrically connected to the positive power supply terminal and the negative power supply terminal respectively. The voltage measuring device can measure the voltage between the positive measuring terminal and the negative measuring terminal.

[0015] The DC power supply and voltage measuring device may be implemented by a DC polarizer, or other existing DC power supplies and voltage measuring instruments.

[0016] Preferably, the test liquid is pure water.

[0017] Preferably, the fabric hanging system includes a sample rack and a counterweight; the upper portion of the fabric sample to be tested is suspended from the sample rack, and the counterweight is suspended from the lower portion of the sample rack via a rope. The counterweight is used to apply tension to the fabric sample to keep it flat and wrinkle-free. The counterweight should be heavy enough to maintain a flat surface and should not be too heavy to deform the sample. For example, if the fabric sample to be tested is a plain cotton fabric measuring 100 cm * 60 cm * 0.3 cm, a counterweight of approximately 30 grams is appropriate.

[0018] In a preferred embodiment of the present invention, the rectangular electrode array is divided from top to bottom into a plurality of rectangular electrode sub-arrays. The electrode converter is provided with a cable socket corresponding to each rectangular electrode sub-array. The electrodes in each rectangular electrode sub-array are electrically connected to the corresponding cable socket via a cable. This allows for simultaneous resistivity measurements at detection points located in different rectangular electrode sub-arrays, effectively improving the efficiency of measuring the wicking height of the fabric sample being tested.

[0019] The second technical problem to be solved by the present invention is to provide a method for accurately measuring the wicking height of a fabric, which can be used to solve the problem that the existing method for measuring the wicking height of a fabric does not take the influence of the fabric thickness into consideration, resulting in insufficient measurement accuracy of the wicking height.

[0020] To solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0021] A method for accurately measuring the wicking height of a fabric, characterized in that it is implemented based on the device for accurately measuring the wicking height of a fabric, comprising:

[0022] Step S1, when the fabric sample is dry, measuring the resistivity of each detection point of the fabric sample by the wicking height measurement system, which is recorded as dry resistivity;

[0023] Step S2, immersing the lower end of the fabric sample in the test liquid contained in the water tank, and when the immersion time reaches a preset time, measuring the resistivity of each detection point of the fabric sample by the wicking height measurement system, which is recorded as: test resistivity;

[0024] Step S3: Detection points where the test resistivity is less than the dry resistivity, i.e., the detection points that were wetted in step S2, are recorded as wet detection points. The detection point at the highest position among the wet detection points is recorded as the highest wet detection point. The height of the highest wet detection point relative to the test liquid level is the wicking height of the tested fabric sample. Two-dimensional coordinates can be established according to the row and column directions of the rectangular electrode array. The coordinates of the test liquid level and each electrode are pre-determined. Once the highest wet detection point is determined, the wicking height can be automatically calculated based on the aforementioned coordinates.

[0025] Wherein, in step S1 and step S2, the method for measuring the resistivity of any one of the detection points by the wicking height measurement system is:

[0026] First, the control device controls the electrode converter to electrically connect four electrodes in the rectangular electrode array to the positive power supply terminal, the negative power supply terminal, the positive measuring terminal, and the negative measuring terminal, respectively. The four electrodes are sequentially designated as the positive power supply electrode, the negative power supply electrode, the positive measuring electrode, and the negative measuring electrode. The positive power supply electrode, the positive measuring electrode, the negative measuring electrode, and the negative power supply electrode are adjacent to each other in the rectangular electrode array and arranged in sequence along the horizontal direction. The portion of the fabric sample to be tested located between the positive measuring electrode and the negative measuring electrode is the detection point. For a rectangular electrode array formed by X*Z electrodes with X columns and Z rows, there are a total of (X-3)*Z detection points.

[0027] Then, when the positive and negative electrodes of the DC power supply are electrically connected to the positive power supply electrode and the negative power supply electrode respectively through the positive power supply terminal and the negative power supply terminal, the voltage between the positive measuring electrode and the negative measuring electrode is measured by the voltage measuring device through the positive measuring terminal and the negative measuring terminal, and is recorded as ΔU;

[0028] Finally, the resistivity ρ of the detection point is calculated according to the following formula:

[0029] ρ=KΔU / I,K=2π / (1 / L AM -1 / L AN -1 / L MB +1 / L NB), L AM =L MN =L NB ;

[0030] Where, I is the current intensity applied by the DC power supply to the positive power supply electrode and the negative power supply electrode, K is the coefficient, and L is AM The distance between the positive power supply electrode and the positive measuring electrode, L AN The distance between the positive supply electrode and the negative measurement electrode, L MB The distance between the positive measuring electrode and the negative supply electrode, L NB Indicates the distance between the negative measuring electrode and the negative supply electrode, L MN Indicates the distance between the positive measuring electrode and the negative measuring electrode.

[0031] Therefore, the present invention fully considers the effect of fabric thickness on wicking height. Electrodes are inserted and embedded in the fabric sample along the thickness direction to form a rectangular electrode array on the surface of the fabric sample, ensuring that the electrodes can contact capillary water absorbed by the internal structure of the fabric sample but not yet completely soaking the surface of the fabric sample. Four electrodes in the rectangular electrode array, adjacent to each other and arranged in sequence along the horizontal direction, are selected by an electrode converter as a positive power supply electrode, a positive measurement electrode, a negative measurement electrode, and a negative power supply electrode. The portion of the fabric sample located between the positive and negative measurement electrodes is used as the detection point, resulting in a densely distributed large number of detection points on the surface of the fabric sample. Furthermore, the resistivity change at each detection point is measured using a resistance method when the fabric sample is dry and after the lower end of the fabric sample has been immersed in the test liquid for a predetermined time. This method locates the highest wetness detection point, determines the wet-dry boundary of the fabric sample, and thereby measures the wicking height of the fabric sample. Therefore, the present invention is unaffected by the thickness, color, and structure of the fabric sample and has the advantage of high wicking height measurement accuracy.

[0032] As a preferred embodiment of the present invention, in step S2, the wicking height measurement system performs test resistivity testing on the detection points on the fabric sample being tested, row by row, from top to bottom, on the rectangular electrode array. Furthermore, after completing the test resistivity testing for each row of detection points, the system immediately determines, in step S3, whether a wet detection point exists in that row. If so, that wet detection point is designated as the highest wet detection point. If not, the system then performs test resistivity testing on the detection points in the next row. This improves the efficiency of wicking height measurement for the fabric sample being tested.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention fully considers the effect of fabric thickness on wicking height. Electrodes are inserted and embedded in the fabric sample along the thickness direction to form a rectangular electrode array on the surface of the fabric sample. This ensures that the electrodes can contact capillary water absorbed by the internal structure of the fabric sample but not yet completely soaking the surface of the fabric sample. Four electrodes in the rectangular electrode array, adjacent to each other and arranged in sequence along the horizontal direction, are selected by an electrode converter as a positive power supply electrode, a positive measurement electrode, a negative measurement electrode, and a negative power supply electrode. The portion of the fabric sample located between the positive and negative measurement electrodes is used as the detection point, resulting in a densely distributed large number of detection points on the surface of the fabric sample. Furthermore, the resistivity change at each detection point is measured using a resistance method when the fabric sample is dry and after the lower end of the fabric sample has been immersed in a test liquid for a predetermined time. This method locates the highest wetness detection point, determines the wet-dry boundary of the fabric sample, and thereby measures the wicking height of the fabric sample. Therefore, the present invention is unaffected by the thickness, color, or structure of the fabric sample and has the advantage of high wicking height measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0036] Figure 1 A front view of a device for accurately measuring the wicking height of fabrics according to the present invention;

[0037] Figure 2 A side view of a device for accurately measuring the wicking height of fabrics according to the present invention;

[0038] Figure 3 This is a simplified diagram of the equivalent circuit of the wicking height measurement system of the present invention when measuring resistivity. DETAILED DESCRIPTION

[0039] The present invention is described in detail below in conjunction with the embodiments and the accompanying drawings to help those skilled in the art better understand the inventive concept of the present invention. However, the scope of protection of the claims of the present invention is not limited to the following embodiments. For those skilled in the art, all other embodiments obtained without creative work without departing from the inventive concept of the present invention shall fall within the scope of protection of the present invention.

[0040] Example 1

[0041] like Figure 1 and Figure 2 As shown, the present invention discloses a device for accurately measuring the wicking height of a fabric, comprising a fabric hanging system, a water tank, and a wicking height measuring system; the fabric hanging system can flatten a fabric sample 1 to be tested on a vertical plane, and the water tank 2 contains a test liquid 3;

[0042] The wicking height measurement system includes X*Z electrodes 4, an electrode converter 5, a control device 6, a DC power supply 7 and a voltage measuring device 8;

[0043] Each electrode 4 is inserted and embedded in the fabric sample 1 along its thickness, and all electrodes 4 are equidistantly arranged on the surface of the fabric sample 1 to form a rectangular electrode array with X columns and Z rows, with the rows and columns of the rectangular electrode array oriented horizontally and vertically, respectively. The cross-sectional dimensions of the electrodes 4 should be sufficiently small to allow them to be inserted and embedded in the fabric sample 1 along its thickness. The spacing between adjacent electrodes 4 should be sufficiently small to meet the accuracy requirements for measuring the wicking height of the fabric sample 1. The smaller the spacing between adjacent electrodes 4, the higher the accuracy of the wicking height obtained. However, the spacing between adjacent electrodes 4 should be maintained at a certain distance to avoid mutual interference between the electrodes 4. Furthermore, depending on the thickness of the fabric sample 1, the electrodes 4 can penetrate the fabric sample 1 in the thickness direction, or they can be inserted only to a certain depth in the thickness direction, as long as the electrodes 4 can contact the capillary water adsorbed by the internal structure of the fabric sample 1.

[0044] The X*Z electrodes 4 are electrically connected to the cable socket 5-1 of the electrode converter 5 through the cable 9. The electrode converter 5 is provided with four terminals, namely, a positive power supply terminal A, a negative power supply terminal B, a positive measuring terminal M and a negative measuring terminal N; the control device 6 can control the electrode converter 5 to electrically connect the four terminals to any four of the X*Z electrodes 4 respectively, and this function of the electrode converter 5 can be realized by a relay; the positive and negative poles of the DC power supply 7 can be electrically connected to the positive power supply terminal A and the negative power supply terminal B respectively, and the voltage measuring device 8 can measure the voltage between the positive measuring terminal M and the negative measuring terminal N.

[0045] The DC power supply 7 and the voltage measuring device 8 may be implemented by a DC polarizer, or other existing DC power supplies and voltage measuring instruments.

[0046] The present invention also discloses a method for accurately measuring the wicking height of a fabric, which is implemented based on the device for accurately measuring the wicking height of a fabric, and includes:

[0047] Step S1, when the fabric sample 1 is dry, measuring the resistivity of each detection point 1-1 of the fabric sample 1 by the wicking height measurement system, and recording it as dry resistivity;

[0048] Step S2, immersing the lower end of the fabric sample 1 in the test liquid 3 contained in the water tank 2, and when the immersion time reaches a preset time, measuring the resistivity of each detection point 1-1 of the fabric sample 1 by the wicking height measurement system, which is recorded as: test resistivity;

[0049] In step S3, the detection point 1-1 whose test resistivity is less than the dry resistivity, i.e., the detection point 1-1 that was wetted in step S2, is recorded as a wet detection point. The detection point 1-1 at the highest position among the wet detection points is recorded as the highest wet detection point. The height of the highest wet detection point relative to the liquid level of the test liquid 3 is the wicking height of the tested fabric sample 1. Two-dimensional coordinates can be established according to the row and column directions of the rectangular electrode array. The coordinates of the liquid level of the test liquid 3 and each electrode 4 are pre-determined. After the highest wet detection point is determined, the wicking height can be automatically calculated based on the aforementioned coordinates.

[0050] Wherein, in step S1 and step S2, the method for measuring the resistivity of any one of the detection points 1-1 by the wicking height measurement system is:

[0051] First, the control device 6 controls the electrode converter 5 to electrically connect the four electrodes 4 in the rectangular electrode array to the positive power supply terminal A, the negative power supply terminal B, the positive measurement terminal M, and the negative measurement terminal N, respectively. The four electrodes 4 are sequentially designated as the positive power supply electrode 4A, the negative power supply electrode 4B, the positive measurement electrode 4M, and the negative measurement electrode 4N. The positive power supply electrode 4A, the positive measurement electrode 4M, the negative measurement electrode 4N, and the negative power supply electrode 4B are adjacent to each other in the rectangular electrode array and arranged in sequence along the horizontal direction. The portion of the fabric sample 1 to be tested located between the positive measurement electrode 4M and the negative measurement electrode 4N is the detection point 1-1. For a rectangular electrode array of X columns and Z rows formed by X*Z electrodes 4, there are a total of (X-3)*Z detection points 1-1.

[0052] Then, see Figure 3 , when the positive and negative electrodes of the DC power supply 7 are electrically connected to the positive power supply electrode 4A and the negative power supply electrode 4B through the positive power supply terminal A and the negative power supply terminal B, respectively, the voltage between the positive measuring electrode 4M and the negative measuring electrode 4N is measured by the voltage measuring device 8 through the positive measuring terminal M and the negative measuring terminal N, and is recorded as ΔU;

[0053] Finally, the resistivity ρ of the detection point 1-1 is calculated according to the following formula:

[0054] ρ=KΔU / I,K=2π / (1 / L AM -1 / L AN -1 / L MB +1 / L NB), L AM =L MN =L NB ;

[0055] Where, I is the current intensity applied by the DC power supply 7 to the positive power supply electrode 4A and the negative power supply electrode 4B, K is the coefficient, and L is AM represents the distance between the positive power supply electrode 4A and the positive measurement electrode 4M, L AN represents the distance between the positive power supply electrode 4A and the negative measurement electrode 4N, L MB represents the distance between the positive measurement electrode 4M and the negative power supply electrode 4B, L NB represents the distance between the negative measurement electrode 4N and the negative supply electrode 4B, L MN represents the distance between the positive measuring electrode 4M and the negative measuring electrode 4N.

[0056] Therefore, the present invention fully considers the influence of fabric thickness on wicking height, and forms a rectangular electrode array on the surface of the fabric sample 1 by inserting and embedding the electrodes 4 in the fabric sample 1 to be tested in the thickness direction, ensuring that the electrodes 4 can contact the capillary water adsorbed by the internal structure of the fabric sample 1 to be tested but not yet completely soaked in the capillary water on the surface of the fabric sample 1 to be tested, and selects four electrodes 4 in the rectangular electrode array that are adjacent to each other and arranged in sequence in the horizontal direction through the electrode converter 5 as the positive power supply electrode 4A, the positive measuring electrode 4M, the negative measuring electrode 4N and the negative power supply electrode 4B, and the fabric sample 1 to be tested is located between the positive measuring electrode 4M and the negative measuring electrode 4N. The area between the electrodes 4N serves as the detection point 1-1, so that a large number of densely distributed detection points 1-1 are formed on the surface of the fabric sample 1 to be tested. In addition, the resistivity change of each detection point 1-1 when the fabric sample 1 to be tested is dry and after the lower end of the fabric sample 1 to be tested is detected by the resistance method, so as to find the position of the highest wet detection point, determine the wetting-drying boundary point of the fabric sample 1 to be tested, and thus measure the wicking height of the fabric sample 1 to be tested. Therefore, the present invention is not affected by the thickness, color, and structure of the fabric sample 1 to be tested, and has the advantage of high wicking height measurement accuracy.

[0057] The above is a basic implementation of the first embodiment of the present invention. Further optimization, improvement and limitation can be made based on this basic implementation:

[0058] Preferably, the test liquid 3 is pure water.

[0059] Preferably, the fabric hanging system includes a sample rack 10 and a counterweight 11. The upper portion of the fabric sample 1 to be tested is suspended from the sample rack 10, and the counterweight 11 is suspended from the lower portion of the sample rack 10 via a rope. The counterweight 11 is used to apply tension to the fabric sample 1 to keep it flat and wrinkle-free. The weight of the counterweight 11 only needs to be sufficient to maintain the surface of the fabric sample 1, and should not be too heavy to deform the fabric sample 1. For example, if the fabric sample 1 to be tested is a pure cotton plain weave fabric measuring 100 cm * 60 cm * 0.3 cm, the counterweight 11 should preferably weigh approximately 30 grams.

[0060] Example 2

[0061] On the basis of the above-mentioned embodiment 1, this embodiment 2 further adopts the following preferred implementation manner:

[0062] The rectangular electrode array is divided from top to bottom into multiple rectangular electrode sub-arrays. The electrode converter 5 is provided with a cable socket 5-1 corresponding to each rectangular electrode sub-array. Each electrode 4 in the rectangular electrode sub-array is electrically connected to the corresponding cable socket 5-1 via a cable 9. Consequently, resistivity measurements can be performed simultaneously at detection points 1-1 located in different rectangular electrode sub-arrays, effectively improving the efficiency of measuring the wicking height of the fabric sample 1 being tested.

[0063] Example 3

[0064] Based on the above-mentioned embodiment 1 or embodiment 2, this embodiment 3 further adopts the following preferred implementation manner:

[0065] In step S2, the wicking height measurement system performs test resistivity testing on the rectangular electrode array at detection points 1-1 on the fabric sample 1 being tested, row by row, from top to bottom. After completing the test resistivity testing for detection points 1-1 in each row, the system immediately determines, in step S3, whether a wet detection point exists in the detection points 1-1 in that row. If so, the wet detection point is designated as the highest wet detection point. If not, the system performs test resistivity testing on detection points 1-1 in the next row. This improves the efficiency of measuring the wicking height of the fabric sample 1 being tested.

[0066] The present invention is not limited to the above-mentioned specific implementation methods. According to the above content, in accordance with the common technical knowledge and customary means in this field, without departing from the above-mentioned basic technical ideas of the present invention, the present invention can also make other various forms of equivalent modifications, replacements or changes, all of which fall within the scope of protection of the present invention.

Claims

1. A method for accurately measuring the wicking height of a fabric, characterized by: Implementation based on a highly accurate measurement device for fabric wicking; A device for accurately measuring the wicking height of a fabric comprises a fabric hanging system, a water tank, and a wicking height measuring system; the fabric hanging system can flatten a fabric sample (1) to be measured on a vertical plane, and the water tank (2) contains a test liquid (3); The wicking height measurement system comprises X*Z electrodes (4), an electrode converter (5), a control device (6), a DC power supply (7) and a voltage measuring device (8); Each of the electrodes (4) is inserted along the thickness direction of the fabric sample (1) to be tested and buried in the fabric sample (1) to be tested, and all of the electrodes (4) are equidistantly arranged on the surface of the fabric sample (1) to be tested to form a rectangular electrode array of X columns and Z rows, wherein the row and column directions of the rectangular electrode array are horizontal and vertical directions respectively; The X*Z electrodes (4) are electrically connected to the cable socket (5-1) of the electrode converter (5) via a cable (9); the electrode converter (5) is provided with four terminals, namely a positive power supply terminal (A), a negative power supply terminal (B), a positive measurement terminal (M) and a negative measurement terminal (N); the control device (6) is capable of controlling the electrode converter (5) to electrically connect the four terminals to any four of the X*Z electrodes (4); the positive and negative poles of the DC power supply (7) are capable of electrically connecting to the positive power supply terminal (A) and the negative power supply terminal (B), respectively; and the voltage measuring device (8) is capable of measuring the voltage between the positive measurement terminal (M) and the negative measurement terminal (N); The method for accurately measuring the fabric wicking height includes: Step S1, when the fabric sample (1) is dry, the resistivity of each detection point (1-1) of the fabric sample (1) is measured by the wicking height measurement system, and recorded as: dry resistivity; Step S2, immersing the lower end of the fabric sample (1) to be tested into the test liquid (3) contained in the water tank (2), and when the immersion time reaches a preset time, measuring the resistivity of each detection point (1-1) of the fabric sample (1) to be tested by the wicking height measurement system, and recording it as: test resistivity; Step S3, recording the detection point (1-1) where the test resistivity is less than the dry resistivity as a wet detection point, recording the detection point (1-1) at the highest position among the wet detection points as the highest wet detection point, and the height of the highest wet detection point relative to the liquid level of the test liquid (3) is the wicking height of the tested fabric sample (1); In step S1 and step S2, the method for measuring the resistivity of any one of the detection points (1-1) by the wicking height measurement system is: First, the electrode converter (5) is controlled by the control device (6) to electrically connect the four electrodes (4) in the rectangular electrode array to the positive power supply terminal (A), the negative power supply terminal (B), the positive measurement terminal (M), and the negative measurement terminal (N), and the four electrodes (4) are sequentially recorded as the positive power supply electrode (4A), the negative power supply electrode (4B), the positive measurement electrode (4M), and the negative measurement electrode (4N); wherein the positive power supply electrode (4A), the positive measurement electrode (4M), the negative measurement electrode (4N), and the negative power supply electrode (4B) are adjacent to each other in the rectangular electrode array and are sequentially arranged in the horizontal direction, and the portion of the fabric sample (1) to be tested located between the positive measurement electrode (4M) and the negative measurement electrode (4N) is the detection point (1-1); Then, when the positive and negative electrodes of the DC power supply (7) are electrically connected to the positive power supply electrode (4A) and the negative power supply electrode (4B) respectively through the positive power supply terminal (A) and the negative power supply terminal (B), the voltage between the positive measurement electrode (4M) and the negative measurement electrode (4N) is measured by the voltage measuring device (8) through the positive measurement terminal (M) and the negative measurement terminal (N), and is recorded as ΔU; Finally, the resistivity ρ of the detection point (1-1) is calculated according to the following formula: ρ=KΔU / I,K=2π / (1 / L AM -1 / L AN -1 / L MB +1 / L NB ),L AM =L MN =L NB ; Wherein, I is the current intensity applied by the DC power supply (7) to the positive power supply electrode (4A) and the negative power supply electrode (4B), K is the coefficient, and L is AM The distance between the positive power supply electrode (4A) and the positive measurement electrode (4M), L AN The distance between the positive supply electrode (4A) and the negative measurement electrode (4N) is L MB represents the distance between the positive measurement electrode (4M) and the negative supply electrode (4B), L NB represents the distance between the negative measurement electrode (4N) and the negative power supply electrode (4B), L MN Indicates the distance between the positive measuring electrode (4M) and the negative measuring electrode (4N).

2. The method for accurately measuring fabric wicking height according to claim 1, characterized in that: The test liquid (3) is pure water.

3. The method for accurately measuring fabric wicking height according to claim 1, wherein: The fabric hanging system comprises a sample rack (10) and a counterweight (11); the upper part of the fabric sample (1) to be tested is hung on the sample rack (10), and the counterweight (11) is hung on the lower part of the sample rack (10) through a rope.

4. The method for accurately measuring fabric wicking height according to any one of claims 1 to 3, characterized in that: The rectangular electrode array is divided into a plurality of rectangular electrode sub-arrays from top to bottom, the electrode converter (5) is provided with a cable socket (5-1) corresponding to each rectangular electrode sub-array, and the electrodes (4) in each rectangular electrode sub-array are electrically connected to the corresponding cable socket (5-1) via a cable (9).

5. The method for accurately measuring fabric wicking height according to claim 1, wherein: In the step S2, the wicking height measurement system performs a test resistivity test on the detection points (1-1) on the fabric sample (1) to be tested, in a row-by-row order from top to bottom, on the rectangular electrode array; and immediately after completing the test resistivity test on the detection points (1-1) in each row, it is determined according to the step S3 whether there is a wet detection point in the detection points (1-1) in the row; if so, the wet detection point is the highest wet detection point; if not, the test resistivity test is performed on the detection points (1-1) in the next row.

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