Method and device for detecting diffusion and evaporation of liquid in shell fabric

Abstract

The invention discloses a method and device for detecting the diffusion and evaporation of a liquid in a shell fabric, belonging to the technical field of detection of shell fabric performance. Probes are regularly inserted into certain fixed points on the shell fabric, and are connected together through a detection circuit; the resistance values between adjacent probes is measured by using the detection circuit; and the water diffusion and evaporation situations of the liquid on the shell fabric can be indirectly obtained according to the resistance values. The method and the device have the advantages of easiness for operating, accurate detection result, and the like.

Description

Technical field: [0001] The invention relates to a method and a device for detecting clothing fabrics, in particular to a method and a device for detecting liquid diffusion and evaporation in fabrics. Background technique: [0002] At present, there are mainly the following types of testing methods and devices for moisture-wicking and sweat-wicking performance of fabrics: [0003] (1) Automatic detection method based on electrical response principle [0004] Hollies, Kaessinger, Watson and others began to do research in this area in the 1950s. They inserted some metal needles into some fixed points on the fabric, and connected these needles to the detection circuit. When the liquid conducts to these points of the fabric At this time, the induction device on the circuit will send a signal to the recording device, so that the time when the liquid conducts to these fixed points can be obtained, and the liquid conduction distance is fixed, and the liquid conduction velocity...

AI Technical Summary

Problems solved by technology

There are three deficiencies in testing the moisture permeability of fabrics: first, the experiment can only measure the moisture permeability of fabrics along a single direction, but cannot measure the moisture permeability of fabrics in different directions at the same time, so that the moisture permeability of fabrics in warp and weft cannot be obtained. The difference in performance is also not conducive to comprehensive evaluation of fabrics; second, the experiment can only measure the maximum moisture-conducting capacity of the fabric, but cannot obtain the conduction speed of liquid in different positions in the fabric; third, the test time is long (30min) The amount of water and heat energy consumed by the evaporation of liquids in the air interferes with the test results

There are two defects in this method: first, because the gas-liquid interfacial tension, density, etc. of the dyed liquid are different from those of water, and these liquids themselves are also quite different, which affects the measurement accuracy of this measurement method

Second, the dye test method can only measure the liquid conduction velocity on the surface of the fabric, but cannot measure the liquid conduction velocity inside the fabric (the internal conduction velocity of the fabric is often faster than its surface conduction velocity), which will also bring errors to the measurement

[0023] Fourth, the method of adding electrolytes to water adopted by Hollies et al. The liquid with electrolytes is easily affected by impurities and chemical residues of fabric finishing, thus reducing the credibility of the experimental results

[0024] Fifth, the image processing technology developed by Donghua University tests the moisture permeability of fabrics, but this technology is easily affected by the color of colored fabrics, especially printed fabrics, which greatly interferes with image acquisition and affects the test results; at the same time, the test method instrument The cost is high, and there are still some difficulties in popularization and application

[0025] Sixth, although the probe method and the ring method are processed by computer, the speed is faster and the accuracy is higher, but both are tested in the horizontal state of the fabric. When it does not conform to the human body wearing clothing fabrics, the fabric will be in a vertical state. Under the actual situation of the vertical diffusion of sweat, at the same time, testing the performance of the fabric in the horizontal environment requires higher requirements for the fabric. If the fabric needs to be placed horizontally and tightened, this will cause great limitations to the testing method and device.

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