Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for testing, analyzing and quantitatively classifying the color of carded fleece

A technology of test analysis and classification method, which is applied in the direction of color measurement device, color measurement using electric radiation detector, measurement device, etc., can solve the problems of small amount of samples, no consideration of filtering effect, large difference of dark velvet, etc. Achieve comprehensive characterization and evaluation, improve sample representativeness, and simplify hardware structure

Active Publication Date: 2021-10-26
DONGHUA UNIV +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that this type of standard has three major defects: (1) The filter effect of the 3mm thick glass at the bottom of the color measurement container on the light of the test light path is not considered, and the test value is the composite color of the fiber color and the glass color of the sample box
(2) Spectrophotometer test window area or actual test area is 3-7cm 2 , suitable for fiber samples with small color dispersion and white main color, such as chemical fibers with uniform color, for fibers with large color dispersion such as cashmere, the sample size is relatively small, and the sample representativeness is insufficient
(3) The color measurement method based on the spectrophotometer can only give the average color index of the tested sample, but cannot give the color variability inside the tested sample
When using this invention patent application (CN 110646354 A) to test the color of cashmere, there are five problems: (1) The color test value of dark cashmere is very different from that of the standard instrument. Detailed analysis finds that the reason is that the existing color space conversion equation is not suitable for dark cashmere. cashmere, only suitable for natural white and light-colored samples such as cotton and white cashmere
(2) The Hunter color index has never been used for other fibers or textiles other than cotton. The color index of the CIE Lab color space is more commonly used to characterize the color of objects internationally and domestically. The publication number is CN 110646354 A. Hunter color index correction equation is invalid in cashmere color measurement
This method solves the main problem, but there are also obvious defects: first, there are sometimes deviations in the subjective color judgment results of different people; The new sample cannot find the corresponding color in the color library

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for testing, analyzing and quantitatively classifying the color of carded fleece
  • A method for testing, analyzing and quantitatively classifying the color of carded fleece
  • A method for testing, analyzing and quantitatively classifying the color of carded fleece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] Embodiment 1, a kind of white velvet color test

[0107] Weigh 20±0.5g of the white fleece sample after the temperature and humidity balance, spread it evenly into the sample bucket, cover the sample with the upper cover 3, and then put a 4kg pressure block in the middle of the sample upper cover 3.

[0108] Turn on the photoelectric detection circuit, control the CCD to move at a uniform speed under the sample once, and obtain the color image of the surface of the carded fleece, the image size is 12×12cm 2 .

[0109] Get the RGB image of 10×10cm in the middle part of the image, calculate the CIE Lab color index with step 4 of the present invention, and use Data color850 to carry out comparative test, the results are shown in Table 2 below.

[0110] Table 2 Comparison of the test value of this patent with Datacolor for a kind of white fleece

[0111]

[0112]

[0113] As can be seen from the above table 2, the test results of the present invention and the standa...

Embodiment 2

[0114] Embodiment 2, a kind of color test of green velvet

[0115] The color measurement device and method are the same as in Example 1, and the results are shown in Table 3 below.

[0116] Table 3 Comparison of the test value of this patent with Data color of a kind of green velvet

[0117] Datacolor this invention Difference rate / % Coefficient of variation / % L 74.40 74.98 0.78 0.10 a 3.470 3.220 7.2 0.92 b 14.10 13.87 1.6 0.67

Embodiment 3

[0118] Embodiment 3, a kind of color test of light-colored purple velvet

[0119] The color measurement device and method are the same as in Example 1, and the results are shown in Table 4 below.

[0120] Table 4 Comparison of the test value of this patent with the data color of light-colored purple velvet

[0121] Datacolor this invention Difference rate / % Coefficient of variation / % L 49.51 51.97 5.0 0.54 a 4.600 4.610 0.2 2.31 b 10.25 10.41 1.6 1.34

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
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for testing, analyzing and quantitatively classifying the color of carded cashmere. The invention provides a new method and device for testing and analyzing the color of cashmere fibers, including parameters such as sample surface density, compression thickness and pressure, a calibration equation for color indexes, and a set of combined calculation methods for color indexes. The color measurement effect is equivalent to that of standard instruments. However, the new method has the advantages of simple hardware structure, small size, low cost and high test accuracy. A single sample can obtain stable and reliable results.

Description

technical field [0001] The invention relates to a method for testing fiber color and an objective color classification method, in particular to a method for analyzing the color of carded fleece based on a digital image of colored reflected light and a method for distinguishing its natural color category. Background technique [0002] Cashmere is favored by consumers because of its excellent touch, comfort and heat retention. About 70% of the world's cashmere is produced in China. In my country's current GB 18267-2013 "Cashmere" standard, sensory testing is used for length, color and other properties, and the color of cashmere is roughly divided into three categories: white velvet, green velvet and purple velvet. The text of the standard defines the color categories for the subjective assessment of cashmere. The test results are greatly affected by human factors and have poor reproducibility. The lack of quality inspection technology is the "flaw" that restricts the reform o...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/50
CPCG01J3/50G01J2003/467
Inventor 王府梅衡冲冯平李基宁
Owner DONGHUA UNIV