阅读说明：本技术 织物液态水经纬向传递差异测试装置和方法 (Device and method for testing warp-weft transmission difference of fabric in liquid water ) 是由 姚宝国 徐佩 于 2020-04-14 设计创作，主要内容包括：本发明公开了一种织物液态水经纬向传递差异测试装置和方法,所述测试装置包括传感器运动机构、支座机构、液态水供给机构和经纬向测湿组件,经纬向测湿组件包括上传感器和下传感器,上传感器和下传感器包括探针、经向导电环、垫板、纬向导电环、基座,探针包括上盖帽、空心柱、弹簧、测针、针脚。测试方法为通过步进电机、传动机构实现升降臂的上下运动,升降臂向下运动带动上传感器下降,将织物夹在上、下传感器之间,用水泵来提供定量的导电盐水测试液,当待测织物样本中的水分扩散到相应的探针所在的矩形区域时,通过两个传感器上的探针组来测量动态导湿过程中样本正反面及经纬向湿传递的变化。本发明通过把织物液态水经纬向传递差异的测试转化为电阻的测量,测试装置结构简单,操作方便,且测量的精度高,可以较客观地获得织物的经纬向传递差异。(The invention discloses a device and a method for testing warp-weft transmission difference of liquid water in a fabric. The test method comprises the steps of realizing the up-and-down movement of the lifting arm through the stepping motor and the transmission mechanism, driving the upper sensor to descend through the downward movement of the lifting arm, clamping the fabric between the upper sensor and the lower sensor, providing quantitative conductive saline test liquid through a water pump, and measuring the changes of the front side and the back side of a sample and the longitudinal and latitudinal wet transfer in the dynamic wet guide process through the probe sets on the two sensors when the moisture in the fabric sample to be tested is diffused to a rectangular area where corresponding probes are located. The invention converts the test of the fabric liquid water longitudinal and latitudinal transfer difference into the resistance measurement, the test device has simple structure, convenient operation and high measurement precision, and can objectively obtain the longitudinal and latitudinal transfer difference of the fabric.)

1. The utility model provides a fabric liquid water longitude and latitude transfer difference testing arrangement which characterized in that: including sensor motion, support mechanism, liquid water supply mechanism and longitude and latitude direction wet finding subassembly, sensor motion includes shaft coupling (5), step motor (6), ball screw (7), guide rail (8), slider (10) and lifing arm (11), guide rail (8) top is equipped with step motor (6), is equipped with ball screw (7) in the middle of guide rail (8), ball screw (7) link with step motor (6) through shaft coupling (5), and slider (10) are located in the middle of the guide rail to wear to arrange on ball screw (7), connect lifing arm (11) on slider (10) to drive lifing arm (11) up-and-down motion, guide rail (8) vertical set up in on the support mechanism, liquid water supply mechanism includes water pump (12), outlet pipe (13) and drainage tube (20), lifing arm (11) upper portion is located in water pump (12), water pump (12) and outlet pipe (13) intercommunication, outlet pipe (13) downwardly extending wears to arrange in drainage tube (20), through latitudinal direction wet measurement subassembly including last sensor (14) and lower sensor (15), goes up sensor (14) and locates lifting arm (11) end, and lower sensor (15) are located on support mechanism's bottom plate (1), go up sensor (14) and lower sensor (15) longitudinal symmetry installation, upward all be equipped with a plurality of rectangles warp direction conducting rings (17) and rectangle latitudinal direction conducting ring (19) on sensor (14) and lower sensor (15).

2. The device for testing the difference of the warp and weft transmission of the liquid water of the fabric according to claim 1, characterized in that: go up sensor (14) and divide equally with sensor (15) down and do not include probe (16), warp direction conducting ring (17), backing plate (18), latitudinal direction conducting ring (19) and base (21), install warp direction conducting ring (17) and latitudinal direction conducting ring (19) on base (21), warp direction conducting ring (17) and latitudinal direction conducting ring (19) are connected with base (21) through backing plate (18), form stair structure on base (21), the layer difference in height between warp direction conducting ring (17) and latitudinal direction conducting ring (19) is the ring distance, backing plate (18) are made by insulating material, and symmetrically distributed probe (16) are installed to warp direction conducting ring (17) and latitudinal direction conducting ring (19) at the central point of four corners and four sides, and latitudinal direction and the distance of each excursion probe (16) diameter along warp direction and latitudinal direction for base (21) central point position to backing plate (19), avoid probe (16) position overlapping, probe (16) pass the position on base (21) and open there is the through-hole, and base (21) center off the right position is equipped with drainage tube (20).

3. The device for testing the difference of the liquid water transmission in the warp and weft directions of the fabric according to claim 2, is characterized in that: the probe (16) comprises an upper cover cap (22), a hollow column (23), a spring (24), a measuring needle (25) and a pin (26), the spring (24) is arranged in the hollow column (23), the upper cover cap (22) is arranged at the upper end of the hollow column (23), the measuring needle (24) is arranged at the lower end of the hollow column (23), and the pin (26) is arranged at the lower end of the measuring needle (24).

4. A method for testing the difference of the liquid water transmission in the longitudinal and latitudinal directions of a fabric is based on the device for testing the difference of the liquid water transmission in the longitudinal and latitudinal directions of the fabric in claim 1, and is characterized in that: the method comprises the following steps:

the vertical motion of a lifting arm (11) is realized through a stepping motor (6) and a transmission mechanism, the lifting arm (11) moves downwards to drive an upper sensor (14) to descend, the fabric is clamped between the upper sensor and a lower sensor, a water pump (12) is used for providing quantitative conductive saline test solution, and when moisture in a fabric sample to be tested is diffused to a rectangular area where corresponding probes (16) are located, the front and back sides of the sample and the change of longitudinal and latitudinal wet transfer in the dynamic wet guide process are measured through probe (16) groups on the two sensors.

5. The method for testing the difference of the liquid water in the warp and weft directions of the fabric as claimed in claim 4, wherein the testing method is characterized in that the warp and weft directions wet transfer speeds of the front and back surfaces of the fabric are calculated through test data, and the warp and weft directions wet transfer distances of the front and back surfaces and the wet transfer ranges of the front and back surfaces are different by 10 characteristic indexes, so as to evaluate the difference of the wet transfer of the fabric in the warp and weft directions.

Technical Field

The invention belongs to the field of testing of physical characteristics of fabrics, and particularly relates to a device and a method for testing warp-weft transmission difference of liquid water of a fabric.

Background

Along with the development of social economy, the living standard of people is continuously improved, the requirements of people on the functions and the comfort of clothes are higher and higher, and the effect of adjusting the moisture-heat balance ensures that the wearer feels comfortable and meets the requirements of people. The difference of the liquid water in the longitudinal and transverse transmission is one of the main performances of the wearing comfort of the clothes, and particularly, the actual diffusion condition of water drops on the fabric material, including the diffusion of the water drops on the front surface and the back surface and the diffusion of the water drops in the longitudinal and transverse directions, is a main factor for determining the heat and humidity comfort of the fabric.

There are also many methods and instruments for testing the liquid water management properties of fabrics. The method and apparatus for testing moisture permeability of fabric are reported in the document "method and apparatus for testing moisture permeability of fabric" (test method and apparatus for testing moisture permeability of fabric before Zhang, Liquiria, luogong, International textile guide, 2007 (36): 67-68), and indicate that there are four types of test methods for testing moisture permeability of fabric in common use: strip wicking, drip, weighing and water retention. The four test methods have advantages and disadvantages and are suitable for testing the moisture permeability of different types of fabrics. The existing fabric wet permeability testing instrument adopts a testing method which mainly comprises an automatic testing method based on an electric response principle, a colored liquid testing method, an ultrasonic positioning method, a CCD (charge coupled device) testing method, a resistance testing method and the like.

Chinese patent CN1111281C discloses a test instrument for the relative water content of two sides of a fabric. In the instrument, a sensor consisting of a metal circular ring probe is used for measuring the voltage value generated by the fabric under the wet condition so as to reflect the relative water content of the two sides of the fabric. However, the metal annular probe adopted in the patent has no elasticity, and the flatness of a test sample cannot be ensured, so that the precision of a test result is influenced; in addition, the test sensor in the patent cannot measure the water content difference of the fabric in the warp and weft directions. Chinese patent CN101403672B discloses a measuring method and device for rapid detection of moisture content in textiles. The method inputs hot air to one end of a sample holding cylinder to accelerate the evaporation of water; outputting hot air to the other end of the sample holding cylinder to quickly discharge moisture; the moisture content of the textile is measured by weighing the mass of the sample containing cylinder. The device for realizing the method consists of a sliding door for adjusting the air flow, an induction cooker for heating air, a fan for controlling the air flow rate, a sample holding cylinder connected with a force sensor, an electromagnetic driving mechanism and a box body for driving an exhaust system, a signal acquisition and input system, a mechanism driving control module, program software and a computer. However, this testing device is cumbersome and cannot distinguish between the front and back sides of the textile material and the difference in moisture content in the warp and weft directions. Chinese patent CN106525665A discloses a fabric moisture permeability testing instrument and method based on image processing technology. The method comprises the steps of shooting images through a CCD serial port camera, and obtaining the actual dynamic diffusion area of water drops through image processing to reflect the moisture-conducting performance of the fabric. However, the test method cannot distinguish the moisture permeability of the front and back sides of the fabric material, and the method is not suitable for completely water repellent fabric materials.

Therefore, in the fabric detection industry, a method and equipment for rapidly, simply and accurately testing the liquid water management performance of the textile are urgently needed, and particularly, the difference of water drops diffusing on the front surface and the back surface of the textile and in the warp and weft directions is detected.

Disclosure of Invention

The invention aims to solve the technical problem of providing a device and a method for testing the warp-weft transfer difference of liquid water for fabrics, which can quickly, simply and accurately finish the warp-weft transfer difference test of the liquid water for fabrics, so as to solve the problems in the prior art.

The invention provides a warp-weft transmission difference testing device for liquid water of fabrics, which comprises a sensor motion mechanism, a support mechanism, a liquid water supply mechanism and a warp-weft direction humidity measurement assembly, wherein the sensor motion mechanism comprises a coupler, a stepping motor, a ball screw, a guide rail, a slide block and a lifting arm, the stepping motor is arranged above the guide rail, the ball screw is arranged in the middle of the guide rail and is connected with the stepping motor through the coupler, the slide block is arranged in the middle of the guide rail and penetrates through the ball screw, the lifting arm is connected onto the slide block to drive the lifting arm to move up and down, the guide rail is vertically arranged on the support mechanism, the liquid water supply mechanism comprises a water pump, a water outlet pipe and a drainage pipe, the water pump is arranged at the upper part of the lifting arm and is communicated with the water outlet pipe, the water pump extends downwards and penetrates through the drainage pipe, the longitude and latitude direction moisture-measuring component comprises an upper sensor and a lower sensor, the upper sensor is arranged at the tail end of the lifting arm, the lower sensor is arranged on a bottom plate of the support mechanism, the upper sensor and the lower sensor are arranged in a vertically symmetrical mode, and a plurality of rectangular warp-wise conducting rings and rectangular weft-wise conducting rings are arranged on the upper sensor and the lower sensor.

Optionally, it divide equally to go up the sensor and do not include probe, warp direction conducting ring, backing plate, latitudinal direction conducting ring and base with lower sensor, install warp direction conducting ring and latitudinal direction conducting ring on the base, warp direction conducting ring and latitudinal direction conducting ring are connected with the base through the backing plate, form stair structure on the base, and the layer difference in height between warp direction conducting ring and the latitudinal direction conducting ring is the ring distance, and the backing plate is made by insulating material, and symmetrical distribution's probe is installed at the central point position on four angles and four edges to warp direction conducting ring and latitudinal direction conducting ring, and the latitudinal direction conducting ring is for the distance of each skew probe diameter of warp direction and latitudinal direction of base central point position edge, avoids probe position to overlap, and the probe passes the.

Optionally, the probe includes block, hollow post, spring, survey needle and stitch, be equipped with the spring in the hollow post, hollow post upper end is equipped with the block, and the lower extreme is equipped with the survey needle, the survey needle lower extreme is equipped with the stitch.

The invention provides another technical solution, which is to provide a method for testing the difference of the liquid water in the textile in the warp and weft directions, and the device for testing the difference of the liquid water in the textile in the warp and weft directions comprises the following steps:

the vertical motion of the lifting arm is realized through a stepping motor and a transmission mechanism, the downward motion of the lifting arm drives the upper sensor to descend, the fabric is clamped between the upper sensor and the lower sensor, a water pump is used for providing quantitative conductive saline test liquid, and when moisture in a fabric sample to be tested is diffused to a rectangular area where corresponding probes are located, the changes of the front and back surfaces of the sample and the warp-weft wet transfer in the dynamic wet guide process are measured through probe sets on the two sensors.

Optionally, the testing method calculates, through the test data, warp and weft wet transfer speeds of the front and back surfaces of the fabric, and the warp and weft wet transfer distances of the front and back surfaces and the wet transfer ranges of the front and back surfaces are different by 10 characteristic indexes, so as to evaluate the difference of the warp and weft wet transfer of the fabric.

Compared with the prior art, the invention has the following advantages: when the fabric is dry, when a closed path formed by the fabric is detected, the resistance value of the fabric is very large, and no current passes through the closed path, so that the voltage at two ends is zero, however, when the fabric is wet or contains moisture, the resistance value of the fabric is reduced, current passes through the closed path, and the voltage is increased, namely, the larger the detected resistance value is, the lower the moisture content is; the smaller the resistance value, the more the moisture content. When the water drops are transferred to the maximum range and are not diffused any more, the transfer range of the water drops can be judged through the measured resistance value. And meanwhile, the measurement of the moisture content in the fabric can be converted into the measurement of the fabric resistance. The invention converts the test of the fabric liquid water longitudinal and latitudinal transfer difference into the resistance measurement, the test device has simple structure, convenient operation and high measurement precision, and can objectively obtain the longitudinal and latitudinal transfer difference of the fabric.

Drawings

FIG. 1 is an overall structure diagram of a device for testing the warp and weft transfer difference of the liquid water of the fabric according to the invention;

FIG. 2 is a schematic structural diagram of an upper sensor;

FIG. 3 is a schematic structural view of a probe;

FIG. 4 is a schematic diagram of a probe position with a maximum radial conductive loop;

in the figure: the device comprises a bottom plate 1, a left support 2, a lower support 3, an upper support 4, a coupler 5, a stepping motor 6, a screw rod 7, a sliding rail 8, a right support 9, a sliding table 10, a lifting arm 11, a micro pump 12, a water outlet pipe 13, an upper sensor 14, a lower sensor 15, a probe 16, a warp-wise conductive ring 17, a base plate 18, a weft-wise conductive ring 19, a drainage tube 20, a base 21, an upper cover cap 22, a hollow column 23, a spring 24, a measuring needle 25 and a pin 26.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings.

The invention is intended to cover alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the invention. In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Moreover, the drawings of the present invention are not necessarily to scale, nor are they necessarily to scale, as may be shown and described herein.

As shown in fig. 1, 2, 3 and 4, the warp and weft transmission difference testing device for liquid water of fabric of the invention comprises a sensor motion mechanism, a support mechanism, a liquid water supply mechanism and a warp and weft wet finding assembly, wherein the sensor motion mechanism comprises a coupler 5, a stepping motor 6, a ball screw 7, a guide rail 8, a slider 10 and a lifting arm 11, the stepping motor 6 is arranged above the guide rail 8, the ball screw 7 is arranged in the middle of the guide rail 8 and is connected with the stepping motor 6 through the coupler 5, the slider 10 is arranged in the middle of the guide rail and is connected with the ball screw 7, the lifting arm 11 is arranged in the middle of the slider 10 and drives the lifting arm 11 to move up and down, the support mechanism comprises a bottom plate 1, a left support 2, a lower support 3, an upper support 4 and a right support 9, a left support 2 and a right support 9 are arranged on the left side and the right side of the bottom plate 1 in parallel, the, lower carriage 3 and upper bracket 4 are equipped with guide rail 8 in the middle of being positive, liquid water feed mechanism includes water pump 12, outlet pipe 13, drainage tube 20, and lift arm 11 top is located to water pump 12, is equipped with outlet pipe 13 under water pump 12, and inside drainage tube 20 was located to outlet pipe 13, longitude and latitude direction moisture measurement subassembly included sensor 14 and lower sensor 15, and it is terminal to go up sensor 14 and locate lift arm 11, and lower sensor 15 locates bottom plate 1 directly over, goes up sensor 14 and 15 symmetrical installations of lower sensor, upward all be equipped with a plurality of rectangle warp direction conducting rings 17 and rectangle latitudinal direction conducting ring 19 on sensor 14 and the lower sensor 15, the difference of the long limit of rectangle and minor face is the twice of ring distance.

Go up sensor 14 and sensor 15 and include probe 16, warp direction conducting ring 17, backing plate 18, latitudinal direction conducting ring 19, base 21, install warp direction conducting ring 17 and latitudinal direction conducting ring 19 on the base 21, warp direction conducting ring 17 and latitudinal direction conducting ring 19 are connected with base 21 through backing plate 18, form ladder structure installation on base 21, the layer difference in height between warp direction conducting ring 17 and the latitudinal direction conducting ring 19 is the ring distance, backing plate 18 is made by insulating material, symmetrical distribution's probe 16 is installed at the central point position of four angles and four limits to warp direction conducting ring 17 and latitudinal direction conducting ring 19, latitudinal direction conducting ring 19 is for base 21 central point position along the distance of warp direction and each skew probe 16 diameter of latitudinal direction, avoid probe 16 position overlapping, probe 16 on the base 21 passes the position and opens there is the through-hole, base 21 center position to. The probe 16 comprises an upper cover cap 22, a hollow column 23, a spring 24, a measuring needle 25 and a pin 26, wherein the spring 24 is arranged in the hollow column 23, the upper cover cap 22 is arranged at the upper end of the hollow column 23, the measuring needle 24 is arranged at the lower end of the hollow column 23, and the pin 26 is arranged at the lower end of the measuring needle 24.

The test method comprises the following steps: the vertical movement of the lifting arm 11 is realized through the stepping motor 6 and the transmission mechanism, the lifting arm 11 moves downwards to drive the upper sensor 14 to descend, the fabric is clamped between the upper sensor and the lower sensor, the water pump 12 is used for providing quantitative conductive saline test liquid, and when moisture in a fabric sample to be tested is diffused to a rectangular area where the corresponding probe 16 is located, the changes of the front side and the back side of the sample and the warp-weft wet transfer in the dynamic wet guide process are measured through the probe 16 groups on the two sensors.

The test principle is as follows: when the fabric is dry, when a closed path formed by the fabric is detected, the resistance value of the fabric is very large, and no current passes through the closed path, so that the voltage at two ends is zero, however, when the fabric is wet or contains moisture, the resistance value of the fabric is reduced, current passes through the closed path, and the voltage is increased, namely, the larger the detected resistance value is, the lower the moisture content is; the smaller the resistance value, the more the moisture content. When the water drops are transferred to the maximum range and are not diffused any more, the transfer range of the water drops can be judged through the measured resistance value. And meanwhile, the measurement of the moisture content in the fabric can be converted into the measurement of the fabric resistance.

The warp and weft wet transfer speeds of the front and back surfaces of the fabric can be obtained through test data calculation, the warp and weft wet transfer distances of the front and back surfaces and the difference of the wet transfer ranges of the front and back surfaces are 10 characteristic indexes, and the warp and weft wet transfer differences of the fabric can be evaluated:

(1) the front warp wet transfer distance, which is defined as the maximum distance that a drop of moisture can travel up the front of the fabric.

(2) The face weft wet spread radius, which is defined as the maximum distance that a drop of moisture can travel in the fabric face weft direction.

(3) Front warp wet transfer speed, which is defined as the ratio of front warp wet transfer distance to transfer time.

(4) And the front weft wet transfer speed is defined as the ratio of the front weft wet transfer distance to the transfer time.

(5) The wet transfer distance in the reverse warp direction, which is defined as the maximum distance that a drop of moisture can travel up the reverse side of the fabric.

(6) The wet transfer distance in the weft on the reverse side is defined as the maximum distance that a drop of moisture can travel in the weft on the reverse side of the fabric.

(7) The wet transfer speed of the back warp direction is defined as the ratio of the wet transfer distance of the back warp direction to the transfer time.

(8) And the wet transfer speed of the back weft is defined as the ratio of the wet transfer distance of the back weft to the transfer time.

(9) The front wet transfer range difference is defined as the area difference of the largest annular area formed by the water drop which is transferred in the warp and weft directions on the front surface of the fabric and can reach the farthest conductive ring.

(10) The back surface wet transfer range difference is defined as the area difference of the maximum annular area formed by the farthest conductive ring which can be reached by the dripped water transferred in the warp and weft directions of the fabric surface.

In the 10 indexes, the weight of each index may be set, and the final test data may be obtained after weighted average. Of course, there are other ways to use the data, for example, to match and train 10 indexes with the conditions of the real test object to obtain a training model, and then the type of the textile fabric can be obtained by using the test data of the unknown textile fabric, or the type of the textile fabric is already obtained, and the 10 indexes are deduced reversely. In the qualification judgment, a support vector machine can be adopted for carrying out two-classification screening, thereby being beneficial to the application of the method at an industrial end.

Although the embodiments have been described and illustrated separately, it will be apparent to those skilled in the art that some common techniques may be substituted and integrated between the embodiments, and reference may be made to one of the embodiments not explicitly described, or to another embodiment described.

The foregoing is illustrative of the preferred embodiments of the present invention only and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. In general, all changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.