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Method for measuring density of weft knitted fabric based on spectrum analysis

A technology of density measurement and spectrum analysis, applied in the field of density measurement of weft knitted fabrics based on spectrum analysis, can solve the problems of long time, labor-intensive, difficult to meet automatic production, etc., to improve accuracy and liberate productivity. Effect

Inactive Publication Date: 2012-11-21
JIANGNAN UNIV +1
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Problems solved by technology

From the above analysis, it can be seen that the method of manually analyzing and detecting the density of weft-knitted fabrics takes a long time, and the detection process is highly subjective and labor-intensive. It is difficult to meet the needs of modern textile enterprises for automated production.

Method used

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  • Method for measuring density of weft knitted fabric based on spectrum analysis
  • Method for measuring density of weft knitted fabric based on spectrum analysis
  • Method for measuring density of weft knitted fabric based on spectrum analysis

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Embodiment Construction

[0025] see figure 1 , the invention relates to a method for measuring the density of weft-knitted fabrics based on frequency spectrum analysis, including image acquisition, image preprocessing, two-dimensional discrete Fourier transform of knitted fabric images, peak point filtering in the frequency domain, and characteristic peak points Positioning and calculation of transverse and longitudinal densities of weft-knitted fabrics.

[0026] The working principle of the present invention is as follows: take Visual Basic 6.0 as program design software, compile the automatic detection software of weft-knitted fabric density, described automatic detection software comprises following function: at first read weft-knitted fabric surface by USB or IEEE 1394 interface Then the image is preprocessed to filter out the noise, and then two-dimensional discrete Fourier transform is performed on the weft knitted fabric image, and the peak point filtering is performed in the frequency domain ...

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Abstract

The invention relates to a method for measuring density of a weft knitted fabric based on a spectrum analysis, which is characterized in that the method comprises image acquisition, image preprocessing, two dimensional discrete Fourier transform of knitted fabric image, peak point filtering in frequency domain, point positioning of characteristic peak point, and calculation of horizontal density and vertical density. The invention provides a design principle and a realization method for automatic detection of weft knitted fabric density, an image processing technology is used for realizing the automatic detection of the horizontal density and vertical density, thereby a current method for detecting the density of the weft knitted fabric can be replaced, and the detection accuracy of the weft knitted fabric density can be enhanced, the productivity of operators can be simultaneously liberated, and the method is suitable for modern weaving automation production.

Description

technical field [0001] The invention relates to a method for measuring the density of a weft-knitted fabric, in particular to a method for measuring the density of a weft-knitted fabric based on frequency spectrum analysis. It belongs to the field of textile technology. Background technique [0002] In the production of textiles, it is often necessary to reproduce according to the fabric samples to obtain products consistent with the specifications of the samples. Before production, it is first necessary to analyze the fabric sample to obtain the sample parameters, and the fabric density is one of the most important parameters. The method currently adopted by weft knitting enterprises is to count the number of loops per unit length by specialized analysts with the aid of magnifying equipment such as cloth mirrors, so as to obtain the density of weft knitted fabrics. Generally, it is necessary to count the number of stitches within 50 mm in different regions of the knitted ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84
Inventor 潘如如陈建强周婉刘基宏王鸿博高卫东刘建立
Owner JIANGNAN UNIV
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