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Device and method for detecting permeability of unwoven fabrics

A non-woven fabric, permeability technology, applied in the direction of measurement device, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problems of complex operation, time-consuming and laborious, unable to flow to the load fabric, etc., to achieve easy operation. Fast, accurate and reliable results, overcoming the effect of low test efficiency

Inactive Publication Date: 2014-01-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the detection of non-woven fabric permeability, the more common is the constant water head test method (GB / T15789-2005): under a constant water head, test the flow rate of the water flow vertically through a single layer and cannot load the fabric, and calculate the fabric according to Darcy's law Permeability, this method is complicated to operate, time-consuming and labor-intensive, and requires special sample preparation

Method used

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  • Device and method for detecting permeability of unwoven fabrics
  • Device and method for detecting permeability of unwoven fabrics
  • Device and method for detecting permeability of unwoven fabrics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as Figure 7 Shown is a perspective view of a device for detecting the permeability of nonwoven fabrics. The device for detecting the permeability of nonwoven fabrics is composed of a slide button switch 1, a handle 2, a distance device 3, a display 4, a panel button 5, and an illumination device. 6. It consists of a CCD camera 7 and an image acquisition and processing device 8 . Such as figure 2 As shown, it is the rear view, Figure 5 As its left view, the handle 2 is provided with a slide button switch 1, and the handle 2 is connected to the image acquisition and processing device 8, such as image 3 As shown in the top view, the upper side of the image acquisition and processing device 8 is provided with a display 4 and a panel button 5, such as Figure 4 As shown, its bottom view, Figure 6 As its front view, the image acquisition and processing device 8 is provided with a distance device 3, an illumination device 6 and a CCD camera 7 on the lower side, a...

Embodiment 2

[0043] Such as figure 1 Shown, the workflow schematic diagram of the present invention, get the polyester fiber needle-punched non-woven fabric, the fabric square meter grammage is 400g / m 2 , the thickness is 5.2mm, and the specific steps of detecting the non-woven fabric permeability using the device described in Example 1 are as follows:

[0044] Step 1: Cover the distance device 3 tightly above the test site of the nonwoven fabric sample, start the slide switch 1 to turn on the lighting device 6, CCD camera 7, image acquisition and processing device 8 and display 4, and the display 4 displays in real time The image taken by the CCD camera 7, the image acquisition and processing device 8 is in a ready state;

[0045] Step 2: After the panel button 5 sends a photographing instruction, the image collector selects a frame from the picture captured by the CCD camera 7 and stores it in the image memory;

[0046]Step 3: The image processor extracts the image information store...

Embodiment 3

[0060] Get the polyester fiber needle-punched nonwoven fabric, the fabric square meter gram weight is 260g / m 2 , the thickness is 3.8mm, the detection steps are as follows:

[0061] Step 1: Cover the distance device 3 tightly above the test site of the nonwoven fabric sample, start the slide switch 1 to turn on the lighting device 6, CCD camera 7, image acquisition and processing device 8 and display 4, and the display 4 displays in real time The image taken by the CCD camera 7, the image acquisition and processing device 8 is in a ready state;

[0062] Step 2: After the panel button 5 sends a photographing instruction, the image collector selects a frame from the picture captured by the CCD camera 7 and stores it in the image memory;

[0063] Step 3: The image processor extracts the image information stored in the image memory, converts it into a grayscale image, performs image enhancement processing, selects the threshold value by using the law, and performs image bin...

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Abstract

The invention relates to a device and a method for detecting permeability of unwoven fabrics. The device for detecting the permeability of the unwoven fabrics is characterized by comprising a grab handle which is provided with a slide button switch, wherein the grab handle is connected with an image collecting and processing device; the upper side of the image collecting and processing device is provided with a display and a panel button; the lower side of the image collecting and processing device is provided with a spacing device, an illumination device and a CCD (charge coupled device) camera; the slide button switch is connected with the image collecting and processing device, the CCD camera, the illumination device and the display; and the image collecting and processing device is connected with the panel button, the CCD camera and the display. According to the invention, the permeability of the unwoven fabrics can be detected instantly at any part of the surfaces of the fabrics, and the operation is simple, convenient and rapid, and the accuracy is high.

Description

technical field [0001] The invention relates to a device and method for detecting the permeability of a nonwoven fabric, belonging to the technical field of textile measuring instruments. Background technique [0002] Nonwoven fabrics have excellent properties such as low production cost, wide adaptability of raw materials, high porosity, and excellent drainage and filtration performance, so they are widely used as filter materials in civil engineering and construction fields. As a filter material, it is necessary to select a suitable nonwoven fabric according to the characteristics of the protected soil and the on-site water flow conditions, and the permeability is an important indicator for selecting the fabric. [0003] For the detection of non-woven fabric permeability, the more common is the constant water head test method (GB / T15789-2005): under a constant water head, test the flow rate of the water flow vertically through a single layer and cannot load the fabric, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
Inventor 刘丽芳陆浩杰俞建勇
Owner DONGHUA UNIV