CN106289069B - Fabric quality evaluation method based on yarn cross section perimeter bar evenness - Google Patents
Fabric quality evaluation method based on yarn cross section perimeter bar evenness Download PDFInfo
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- CN106289069B CN106289069B CN201610606207.2A CN201610606207A CN106289069B CN 106289069 B CN106289069 B CN 106289069B CN 201610606207 A CN201610606207 A CN 201610606207A CN 106289069 B CN106289069 B CN 106289069B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
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- General Physics & Mathematics (AREA)
- Woven Fabrics (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The present invention relates to a kind of fabric quality evaluation methods based on yarn cross section perimeter bar evenness, it is a kind of method by the emulation cloth cover quality evaluation fabric quality based on yarn cross section perimeter bar evenness, the present invention is in ellipse and the quick Fundamentals of Measurement of yarn cross section perimeter in yarn cross section model, it is conceived to the Conformance Assessment of yarn qualities and fabric quality, it can efficiently predict the fabric appearance effect of yarn, the objective evaluation index for the fabric quality that the present invention provides, the appearance of practical yarn institute emulating fabric image can be combined to adjust weaving parameters in time according to the index, optimize weaving plan, method relative to traditional looming weaving fabric sample, this method can be realized accurately and efficiently " because of the material application " of different quality yarns, reduce production cost.The fields such as the present invention can be used for yarn appearance quality evaluation, fabric quality is predicted and weaving plan is preferred.
Description
Technical field
The invention belongs to fabric quality assessment technique field, it is related to the fabric quality based on yarn cross section perimeter bar evenness
Evaluation method passing through the emulation cloth cover quality evaluation cloth cover matter based on yarn cross section perimeter bar evenness more particularly to a kind of
The method of amount.
Background technology
It in textile trade, examines in the indices of fabric quality, it is most important that fabric appearance quality, it is also determined
The most important factor of fabric price.In fabric quality, fabric defects is to judge the important indicator of appearance of fabrics quality.Fabric defects
The fabric defects (abbreviation yarn defect) that can be simply divided by caused by yarn qualities is divided in the origin cause of formation from being formed, by weaving process
Bad caused fabric defects (abbreviation float), and the fault (abbreviation color defect) caused by dyeing and final finishing process.
Among these, the bad (fabric of appearance of fabrics quality on fabric is caused by slubbing, details, tieing and the evenness fault etc. on yarn
Yarn defect) it is larger to fabric quality influence degree, economic loss is also more serious.But the prediction of fabric yarn defect with judge at present still with
Based on the method for yarn looming weaving fabric sample, this is more demanding to proofing facility, operating personnel etc., and process efficiency is low
Under, in fast changing market environment, tradition by yarn draw a design carry out Woven fabric sample by predict the side of fabric quality
Method is far from meeting the needs of yarn trade link.For further, the going after profit or gain property of enterprise guides enterprise based on cost squeeze
Consider, under the premise of meeting finished appearance quality, to the yarns of different grades by optimizing weaving plan come " because of material application ",
Change the appearance of the optimization final product such as fabric structure or weaving parameters.This just needs yarn to the accurate of fabric
Efficiently prediction and objective quantitative.
Fabric quality, which is evaluated, to be also needed to need to consider weaving of the yarn to fabric with consistency with yarn qualities evaluation
The deformation relationship of yarn in journey.In fact, in weaving process, oval yarn cross section can stress stretch, compression, torsion and
It flattens and deforms, it is clear that yarn cross section area change is larger in this course, but can be approximately considered yarn cross section during this
Perimeter change is smaller.To which the yarn evenness measurement method based on yarn cross section perimeter is fabric quality evaluation and yarn
Bridge between line mass Conformance Assessment.And it realizes that yarn cross section perimeter quickly measures and has to cut on the yarn of irregular shape
Face carries out reasonably approximate processing.Since a very long time, the needs based on model and calculating, yarn under natural conditions with
And the yarn in fabric its yarn model all assumes that yarn cross section is circle.And the yarn cross section model correlation scholar land in fabric
It is continuous to propose ellipse, track type, lens shaped etc..In fact, ring spinning yarn, Rotor yarn under natural conditions etc. is mostly
Not to be exceptionally close yarn can be similar to ellipse to number yarn textures, though the yarn section shape in fabric because of fabric construction not
For most of fabric tissues be approximately ellipse it is relatively reasonable with variant.Therefore, for take into account accuracy and quickly
Property demand, the yarn cross section of nature according to the present invention and the yarn cross section in fabric are approximately ellipse.
For this purpose, being to be conceived to yarn matter in ellipse and the quick Fundamentals of Measurement of yarn cross section perimeter in yarn cross section model
The Conformance Assessment of amount and fabric quality, the present invention propose a kind of emulation cloth cover matter based on yarn cross section perimeter bar evenness
Measure evaluation method and weaving plan preferred method.This method can realize by yarn to emulation cloth cover presentation quality prediction and comment
Valence can provide reference for the preferred weaving plan of produce reality.
Invention content
Fabric quality evaluation method proposed by the present invention based on yarn cross section perimeter bar evenness, is that one kind passing through base
In the method for the emulation cloth cover quality evaluation fabric quality of yarn cross section perimeter bar evenness.
Fabric quality evaluation method proposed by the present invention based on yarn cross section perimeter bar evenness, steps are as follows：
(1) section of yarn cross section perimeter, yarn is the yarn cross section based on model of ellipse；Long axis is a, short axle b：
(i) the yarn diameter d ' and d " of two mutually perpendicular directions are measured；
(ii) it at least rotates a circle, measures the maximum gauge d of yarnmaxWith minimum diameter dmin；
It calculates to heart rate f=b/a=dmin/dmax；
In formula：A indicates that transverse length, b indicate ellipse short shaft length；
(iii) yarn cross section area S is calculatedi；
Wherein, it is the equivalent area of a circle of yarn diameter that S ', which is with d ', and S " being with d " is the equivalent area of a circle of yarn diameter；
(iv) the yarn image for obtaining yarn identical as used in cloth cover, takes length LypAs through Yarn image, L is takenytAs latitude
Yarn image determines and measures step-length step, determines iypAnd iytFor the measurement point quantity of warp thread and weft yarn, iyt=Lyt/ step, iyp=
Lyp/step；Calculate yarn cross section perimeter Lij, i expression warp thread or weft yarn, i=1 are warp thread, and i=2 is weft yarn, and j is current measures
Point serial number, 0≤j≤max (iyt, iyp)：
In formula：A indicates that transverse length, e indicate that oval eccentricity, t indicate that radian integration variable, f are indicated to heart rate,
SiIndicate that yarn cross section area, d ' and d " indicate the yarn diameter of two mutually perpendicular directions；
(2) cloth cover weave is pressed to emulate：
The cloth cover information of the quasi- evaluation of extraction, including：Weft density, through weave shrinkage, latitude weave shrinkage and cloth cover area Sf；
Learn warp thread radical npWith fill yarn ends ntAnd warp yarn length LpWith single weft yarn length Lt, meet Lyp=
np×LpAnd Lyt=nt×Lt；
It is emulated with Visual C++ according to extracted information, meets condition：Total length L is pressed through Yarn imageypCut np
Section is simultaneously arranged in order, and weft yarn image presses total length LytCut ntSection is simultaneously arranged in order；
Obtain the cloth cover emulating image according to true yarn image；
(3) the cloth cover emulating image is divided into child window, the child window size S after divisioncIt is followed including at least 1 tissue
Ring, and less than the half of the cloth cover emulating image；The child window quantity n=S of divisionf/Sc；
(4) it counts in child window and corresponds to warp thread and fill yarn ends ncpAnd nct, wherein ncp=np/ n, nct=nt/n；
(5) in child window, measurement point quantity is i in warp yarncp=Lp/ (step × n) measures points on single weft yarn
Amount is ict=Lt/ (step × n), counts in each child window that warp thread perimeter of section is cumulative and PpWith weft yarn perimeter of section it is cumulative and
Pt, and through weft yarn perimeter of section is cumulative and Pj,
(6) cloth cover bar evenness FPCV is calculated：
Wherein
Gained FPCV reflects fabric quality.
Fabric quality evaluation method as described above based on yarn cross section perimeter bar evenness measures step-length step and is situated between
Between 1mm-8mm, measurement point quantity iytWith iypAt least all it is 5000.
Fabric quality evaluation method as described above based on yarn cross section perimeter bar evenness, cloth cover weave are
Basic ternary tissue.
Fabric quality evaluation method as described above based on yarn cross section perimeter bar evenness, child window size ScExtremely
Include 1 Weaving Cycle, preferably 10-30 Weaving Cycle less.
Fabric quality evaluation method as described above based on yarn cross section perimeter bar evenness, it is dry equal according to cloth noodles
Evenness FPCV, adjustment weft density can adjust fabric quality through weave shrinkage or latitude weave shrinkage.FPCV indexs are to judge weaving plan
Good and bad Main Basiss, while corresponding emulating fabric image naked eyes judge grade index (reference standard GBT 17759-
2009) it when result meets product grade and requires, preservation scheme and and is weaved.Otherwise, fabric structure type is adjusted
And parameter, until FPCV indexs and emulating fabric grade meet sets requirement.
The fabric quality evaluation method based on yarn cross section perimeter bar evenness of the present invention is a kind of based on practical yarn
The method for objectively evaluating of line image data has the characteristics that subjective assessment and objective evaluation take into account.Compared to passing through emulation merely
The method of textile image subjective judgement appearance of fabrics quality, the objective evaluation index that this method proposes then overcome subjective assessment
It is vulnerable to artificial subjective factor interference, the shortcomings of stability is poor.Again compared to the emulation mode of simulation yarn, the present invention is practical
The fidelity for the result that yarn image simulation obtains is higher.It can be made a living again with preferred weaving plan, this method by constantly adjusting
It produces actual production weaving and reference is provided.
Advantageous effect：
1. this method relative to the methods of looming weaving fabric sample is still widely used at present, has, at low cost, speed is fast,
The advantages that efficient, smaller by interference caused by subjective factors.
2. this method can provide reference for production actual production weaving, under the premise of appearance of fabrics quality is met the requirements,
So that yarn is made the best use of everything, reduces production cost.
3. this method has fully considered the relationship in the yarn in yarn and fabric under natural conditions, the cloth proposed
Face quality evaluation index has preferable consistency with yarn qualities evaluation index.
4. this method, compared to the method by analog image subjective judgement appearance of fabrics quality, this method is subjective and objective simultaneous
The shortcomings of Gu, the artificial subjective factor that is vulnerable to that objective evaluation index overcomes subjective assessment interfere, and stability is poor.Subjective assessment
With reference to existing national standards, the fabric grade simulated to practical yarn image is assessed, and avoids objective evaluation to greatest extent
Loss caused by Indexes Abnormality.
Specific implementation mode
The invention will be further elucidated with reference to specific embodiments.It should be understood that these embodiments are merely to illustrate this hair
It is bright rather than limit the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, art technology
Personnel can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Fixed range.
Fabric quality evaluation method proposed by the present invention based on yarn cross section perimeter bar evenness, steps are as follows：
(1) section of yarn cross section perimeter, yarn is the yarn cross section based on model of ellipse；Long axis is a, short axle b：
(i) the yarn diameter d ' and d " of two mutually perpendicular directions are measured；
(ii) it at least rotates a circle, measures the maximum gauge d of yarnmaxWith minimum diameter dmin；
It calculates to heart rate f=b/a=dmin/dmax；
In formula：A indicates that transverse length, b indicate ellipse short shaft length；
(iii) yarn cross section area S is calculatedi；
Wherein, it is the equivalent area of a circle of yarn diameter that S ', which is with d ', and S " being with d " is the equivalent area of a circle of yarn diameter；
(iv) the yarn image for obtaining yarn identical as used in cloth cover, takes length LypAs through Yarn image, L is takenytAs latitude
Yarn image determines and measures step-length step, determines iypAnd iytFor the measurement point quantity of warp thread and weft yarn, iyt=Lyt/ step, iyp=
Lyp/step；Calculate yarn cross section perimeter Lij, i expression warp thread or weft yarn, i=1 are warp thread, and i=2 is weft yarn, and j is current measures
Point serial number, 0≤j≤max (iyt, iyp)：
In formula：A indicates that transverse length, e indicate that oval eccentricity, t indicate that radian integration variable, f are indicated to heart rate,
SiIndicate that yarn cross section area, d ' and d " indicate the yarn diameter of two mutually perpendicular directions；
(2) cloth cover weave is pressed to emulate：
The cloth cover information of the quasi- evaluation of extraction, including：Weft density, through weave shrinkage, latitude weave shrinkage and cloth cover area Sf；
Learn warp thread radical npWith fill yarn ends ntAnd warp yarn length LpWith single weft yarn length Lt, meet Lyp=
np×LpAnd Lyt=nt×Lt；
It is emulated with Visual C++ according to extracted information, meets condition：Total length L is pressed through Yarn imageypCut np
Section is simultaneously arranged in order, and weft yarn image presses total length LytCut ntSection is simultaneously arranged in order；
Obtain the cloth cover emulating image according to true yarn image；
(3) cloth cover emulating image is divided into child window, the child window size S after divisioncIncluding at least 1 Weaving Cycle,
And less than the half of cloth cover emulating image；The child window quantity n=S of divisionf/Sc；
(4) it counts in child window and corresponds to warp thread and fill yarn ends ncpAnd nct, wherein ncp=np/ n, nct=nt/n；
(5) in child window, measurement point quantity is i in warp yarncp=Lp/ (step × n) measures points on single weft yarn
Amount is ict=Lt/ (step × n), counts in each child window that warp thread perimeter of section is cumulative and PpWith weft yarn perimeter of section it is cumulative and
Pt, and through weft yarn perimeter of section is cumulative and Pj,
(6) cloth cover bar evenness FPCV is calculated：
Wherein
Gained FPCV reflects fabric quality.
Fabric quality evaluation method as described above based on yarn cross section perimeter bar evenness measures step-length step and is situated between
Between 1mm-8mm, measurement point quantity iytWith iypAt least all it is 5000.
Fabric quality evaluation method as described above based on yarn cross section perimeter bar evenness, cloth cover weave are
Basic ternary tissue.
Fabric quality evaluation method as described above based on yarn cross section perimeter bar evenness, child window size ScExtremely
Include 1 Weaving Cycle, preferably 10-30 Weaving Cycle less.
Fabric quality evaluation method as described above based on yarn cross section perimeter bar evenness, it is dry equal according to cloth noodles
Evenness FPCV, adjustment weft density can adjust fabric quality through weave shrinkage or latitude weave shrinkage.FPCV indexs are to judge weaving plan
Good and bad Main Basiss, while corresponding emulating fabric image naked eyes judge grade index (reference standard GBT 17759-
2009) it when result meets product grade and requires, preservation scheme and and is weaved.Otherwise, fabric structure type is adjusted
And parameter, until FPCV indexs and emulating fabric grade meet sets requirement.
Embodiment 1
The cloth cover weft density of quasi- evaluation is 10/cm, is 10% through weave shrinkage, and latitude weave shrinkage is 10%, size 90
×90cm.System acquisition yarn image data is tested with the yarn evenness based on yarn cross section perimeter and measure yarn first
Line perimeter of section：Determine that length of yarn to be measured is 200m, wherein warp length Lyp=100m, weft length LytFor 100m.Acquisition
When, by yarn movement speed control in 10m/min even runnings, acquisition time 20min；Then will through weft yarn image according to
Plain weave pattern structure simulation is fabric, and the weft density through weft yarn is 10/cm in simulation process, is through weave shrinkage
10%, latitude weave shrinkage is 10%, and the fabric size obtained after emulation is 90 × 90cm.And son after carrying out the textile image of emulation
Window divides, and divides size ScFor 1cm*1cm, calculate successively in each child window through weft yarn perimeter of section is cumulative and Pj；Last basis
Through weft yarn perimeter of section is cumulative and P in each child windowjThe cloth cover bar evenness FPCV based on yarn cross section perimeter is calculated, is obtained
FPCV=18%, the index and the cloth cover of quasi- evaluation have preferable consistency, presentation quality fine.If it is desired, can be further
It adjusts the fabric structure in simulation process, adjust weft density, through the parameters such as weave shrinkage or latitude weave shrinkage, you can adjustment is imitated
Genuine fabric quality, carries out fabric quality prediction, and corresponding weaving plan is more excellent scheme.
Claims (5)
1. based on the fabric quality evaluation method of yarn cross section perimeter bar evenness, it is characterized in that：Fabric quality evaluation method
The step of it is as follows：
(1) section of yarn cross section perimeter, yarn is the yarn cross section based on model of ellipse；Long axis is a, short axle b：
(i) the yarn diameter d ' and d " of two mutually perpendicular directions are measured；
(ii) it at least rotates a circle, measures the maximum gauge d of yarnmaxWith minimum diameter dmin；
It calculates to heart rate f=b/a=dmin/dmax；
In formula：A indicates that transverse length, b indicate ellipse short shaft length；
(iii) yarn cross section area S is calculatedi；
Wherein, it is the equivalent area of a circle of yarn diameter that S ', which is with d ', and S " being with d " is the equivalent area of a circle of yarn diameter；
(iv) the yarn image for obtaining yarn identical as used in cloth cover, takes length Lyp As through Yarn image, L is takenytAs weft yarn figure
Picture determines and measures step-length step, determines iypAnd iytFor the measurement point quantity of warp thread and weft yarn, iyt=Lyt/ step, iyp=Lyp/
step；Calculate yarn cross section perimeter Lij, i expression warp thread or weft yarn, i=1 are warp thread, and i=2 is weft yarn, and j is current measurement point sequence
Number, 0≤j≤max (iyt, iyp)：
In formula：E indicates that oval eccentricity, t indicate radian integration variable；
(2) cloth cover weave is pressed to emulate：
The cloth cover information of the quasi- evaluation of extraction, including：Weft density, through weave shrinkage, latitude weave shrinkage and cloth cover area Sf；
Learn warp thread radical npWith fill yarn ends ntAnd warp yarn length LpWith single weft yarn length Lt, meet Lyp=np×
LpAnd Lyt=nt×Lt；
It is emulated with Visual C++ according to extracted information, meets condition：Total length L is pressed through Yarn imageypCut npSection is simultaneously
It is arranged in order, weft yarn image presses total length LytCut ntSection is simultaneously arranged in order；
Obtain the cloth cover emulating image according to true yarn image；
(3) the cloth cover emulating image is divided into child window, the child window size S after divisioncIncluding at least 1 Weaving Cycle, and
Less than the half of the cloth cover emulating image；The child window quantity n=S of divisionf/Sc；
(4) it counts in child window and corresponds to warp thread and fill yarn ends ncpAnd nct, wherein ncp=np/ n, nct=nt/n；
(5) in child window, measurement point quantity is i in warp yarncp=Lp/ (step × n), measurement point quantity is on single weft yarn
ict=Lt/ (step × n), counts in each child window that warp thread perimeter of section is cumulative and PpWith weft yarn perimeter of section is cumulative and Pt, with
And through weft yarn perimeter of section is cumulative and Pj,
(6) cloth cover bar evenness FPCV is calculated：
Wherein
Gained FPCV reflects fabric quality.
2. the fabric quality evaluation method according to claim 1 based on yarn cross section perimeter bar evenness, feature
It is, measures step-length step between 1mm-8mm, measurement point quantity iytWith iypAt least all it is 5000.
3. the fabric quality evaluation method according to claim 1 based on yarn cross section perimeter bar evenness, feature
It is, cloth cover weave is basic ternary tissue.
4. the fabric quality evaluation method according to claim 1 based on yarn cross section perimeter bar evenness, feature
It is, child window size ScFor 10-30 Weaving Cycle.
5. the fabric quality evaluation method according to claim 1 based on yarn cross section perimeter bar evenness, feature
It is, according to cloth cover bar evenness FPCV, adjustment weft density can adjust fabric quality through weave shrinkage or latitude weave shrinkage.
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| CN1530631A (en) * | 2003-03-11 | 2004-09-22 | 陕西长岭纺织机电科技有限公司 | Method and apparatus for measuring yarn section shape |
| CN102253043A (en) * | 2011-06-22 | 2011-11-23 | 上海工程技术大学 | Monocular CCD (Charge Coupled Device) digitalized analysis method of multi-angle yarn appearance |
| CN202362250U (en) * | 2011-06-22 | 2012-08-01 | 上海工程技术大学 | Single-mesh CCD (charge coupled device) multi-angle digital analyzing device for yarn appearances |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2896326B2 (en) * | 1995-05-02 | 1999-05-31 | 鐘紡株式会社 | Evaluation method of crimp standing property of strong twist crimped fabric |
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| CN1530631A (en) * | 2003-03-11 | 2004-09-22 | 陕西长岭纺织机电科技有限公司 | Method and apparatus for measuring yarn section shape |
| CN102253043A (en) * | 2011-06-22 | 2011-11-23 | 上海工程技术大学 | Monocular CCD (Charge Coupled Device) digitalized analysis method of multi-angle yarn appearance |
| CN202362250U (en) * | 2011-06-22 | 2012-08-01 | 上海工程技术大学 | Single-mesh CCD (charge coupled device) multi-angle digital analyzing device for yarn appearances |
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