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Calculation method of fiber lint ratio measurement based on random whisker cluster step-by-step separation model

A technology of step-by-step separation and calculation method, which is applied in the direction of measuring devices, analyzing materials, and material analysis through optical means, which can solve the problems of fluctuation of prediction results, random noise of whisker curves, amplification, etc., and achieve fast and portable measurement The effect of chemical measurement

Active Publication Date: 2018-04-06
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current short-lint rate calculation method based on double-ended whisker images, or the same as the above-mentioned invention patent No. ZL 2013 1 0325921.0, lacks a comprehensive theoretical study on the distribution of short fibers in double-ended whiskers, so that in practical applications In this case, when the type of samples to be tested is quite different from the type of samples used to construct the prediction equation, the prediction results will fluctuate; or the quadratic differential relationship between the whisker curve and the short-lint rate has been studied, but the whisker curve cannot be solved. The problem that the random noise of is amplified in the quadratic differentiation

Method used

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  • Calculation method of fiber lint ratio measurement based on random whisker cluster step-by-step separation model
  • Calculation method of fiber lint ratio measurement based on random whisker cluster step-by-step separation model
  • Calculation method of fiber lint ratio measurement based on random whisker cluster step-by-step separation model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] According to Chinese standards, the short-staple length limit of ordinary fine-staple cotton is X=16 mm. If make m=5, get the fiber buckling coefficient a=0.9, b=1.7 of fine cotton, then formula (1) and (2) are transformed into

[0079] SFC w (16)=0.9×[F(0)+31F(16)-32F(15.5)]-1.7 (15)

[0080] as well as

[0081] SFC w (16)=0.9×[F(0)+31F(-16)-32F(-15.5)]-1.7. (16)

[0082] Select three kinds of fine-staple cotton samples with different short-staple percentages, make 5 double-ended random whiskers for each cotton sample, extract 5 whiskers curves and apply formulas (15) and (16) to obtain 10 SFC w (16) Calculated value, compare with the weight short-lint rate that AFIS records after finding the average, as shown in table 1, obviously, the present invention has very high consistency with reference method.

[0083] Table 1 The present invention measures and calculates the cotton fiber short-staple rate and reference method measured value contrast

[0084] ...

Embodiment 2

[0086] Because the average length of kapok fiber is shorter, make X=12.7 millimeters, m=5, get fiber buckling coefficient a=1.5, b=6.4, then formula (1) and (2) are transformed into

[0087] SFC w (12.7)=1.5×[F(0)+31F(12.7)-32F(12.3)]-6.4 (17)

[0088] as well as

[0089] SFC w (12.7)=1.5*[F(0)+31F(-12.7)-32F(-12.3)]-6.4. (18)

[0090] Select three types of kapok fiber samples with different short-staple ratios, and make 5 double-ended random whiskers for each, and apply formulas (17) and (18) after extracting 5 whiskers curves to obtain 10 SFC w (12.7) The calculated values ​​are averaged, and compared with the short-lint rate values ​​measured according to GB / T16257-2008 "Test of Textile Fiber Short Fiber Length and Length Distribution: Single Fiber Measurement Method", as shown in Table 2, it shows The present invention also has high consistency with the reference method in the measurement of the short-lint rate of the kapok fiber.

[0091] Table 2 The present inventi...

Embodiment 3

[0094] The X=30 millimeters of wool fiber, make m=4, get fiber buckling coefficient a=0.6, b=2.3, because wool fiber beard clump is one side beard clump, only formula (1) is transformed into

[0095] SFC w (30)=0.6*[F(0)+15F(30)-16F(28.125)]-2.3. (19)

[0096] Select three kinds of wool fiber samples with different short-staple percentages, and make 10 single-ended random whiskers for each, and apply the formula (19) after extracting the whiskers curve, and compare the obtained 10 SFC w (30) calculated value is averaged, compared with the Babu (weight) short-lint rate that Almeter records, as shown in table 3, shows the accuracy of the present invention aspect wool fiber short-lint rate measurement.

[0097] Table 3 The present invention measures and calculates the contrast of wool fiber short-lint rate and reference method measured value

[0098]

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Abstract

The invention relates to a random tuft gradual separation model based short fiber content measurement calculating method. The short fiber content measurement calculating method provided by the invention has the advantages as follows: (1) the method fully utilizes the advantage that the random tuft sampling is quick and free of detection blind zone, so that the measurement of the short fiber content is quick and accurate; (2) the method depends on the unique random tuft gradual separation model established on author's own, and deduces a novel calculation formula for the short fiber content for the first time internationally, which not only has a solid theoretic foundation, but also is significant for that the novel calculation formula avoids differential operation relation between the short fiber index and a tuft curve in the existing theory, so as to enable the signal analysis of the detecting apparatus to avoid many error sources; (3) according to the invention, a high-resolution optical imaging device and an image processing technology are combined to realize low-cost and portable measurement of the short fiber content.

Description

technical field [0001] The present invention relates to the technical field of measurement and calculation of characteristic parameters of fiber length distribution, in particular, it relates to analyzing the position distribution of short fibers in random whiskers by using a step-by-step separation model, so as to obtain the fiber short fibers rate from the linear density curve of whiskers The calculation method is applicable to fiber types such as cotton, kapok, cashmere, wool, and chemical fiber staple. Background technique [0002] In textile fiber raw materials, the ratio of the amount of fibers whose length is less than a specific length limit to the total fiber amount is called the short-lint rate (SFC in English), expressed as a percentage. The short-staple length limit of ordinary fine-staple cotton is 16 mm according to Chinese standards, and 12.7 mm according to the US and some international trade standards; while the short-staple limit value of flax fibers with a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/84
CPCG01N21/84G01N2021/8444
Inventor 王府梅徐步高金敬业
Owner DONGHUA UNIV
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