a 3d scanning system for fabric fuzziness and pilling evaluations

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1 A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations Bugao Xu and Ming Yao The University of Texas at Austin January 2005

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A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations. Bugao Xu and Ming Yao. The University of Texas at Austin January 2005. 3D Laser Scanning System. Goal to acquire the surface profile of a fabric and to characterize the surface roughness. Setup Profile sensor: 10um - PowerPoint PPT Presentation

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Page 1: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

Bugao Xu and Ming Yao

The University of Texas at AustinJanuary 2005

Page 2: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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3D Laser Scanning System

Goalto acquire the surface profile of a fabric

and to characterize the surface roughness.

SetupProfile sensor: 10um 2-axis stage: 0.5 um/stepA/D board: 12 bits

Page 3: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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HardwareDimension: 8 x 8 x 6 inches

Page 4: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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Software

Page 5: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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Samples

Five knitted fabric (interlock, dark blue) were washed and dried different cycles.

F5: no fuzzF4: lowF3: mediumF2: high (a few pills)F1: severe ( a lot pills)

Page 6: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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Procedures

• Scan the sample • Level the surface• Set the central plane• Select the offset plane• Calculate surface parameters

Page 7: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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Scanning

Profiles, 1x1 in2

Surface, 200 DPI

Surface, 400 DPI

Page 8: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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Leveling (B-spline Approximation)

u and v: two parameters

Ni,q(v) and Nj,p: basis functions

p and q: degrees

{Pi,j|0<i<m, 0<j<n}: control points

m

i

n

jjipjqi PuNvNvuS

0 0,,, )()(),(

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LevelingScannedSurface

B-spline Fit Plane Leveled Surface

Page 10: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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Offset Plane

Central Planeu=0 um

Offset Planeu=0.25um

Offset Planeu=0.3um

Page 11: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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Surface Roughness(ANSI/ASME B46.1-1985)

Roughness Average Ra

Root-Mean-Square Roughness Rq

Skewness Rs

Central Lineyi

ia yN

R 1

21iq y

NR

33

1i

qs y

NRR

Page 12: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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Skewness

Page 13: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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Surface Roughness(ANSI/ASME B46.1-1985)

Ten-point Height Rz:

5)()( 10864297531 RRRRRRRRRRRz

Page 14: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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Surface Roughness(ANSI/ASME B46.1-1985)

Bearing Length Ratio tp:

Mean Spacing Rsm:

Page 15: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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Surface Roughness

Peak Count Np:

Peak Size Average Sa:

Peak Height Average Ha:

Page 16: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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F5

Page 17: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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F4

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F3

Page 19: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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F2

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F1

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Pilling

Page 22: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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Results

00.20.40.60.8

11.21.4

1 2 3 4 5

RaRqRz

Page 23: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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Results

-0.1

0

0.1

0.2

0.3

0.4

0.5

0.6

1 2 3 4 5

Skew

tpc

Peak count

Peak size

Peak height

Page 24: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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ResultsF1 F2 F3 F4 F5 F6

Ra 0.287 0.139 0.123 0.101 0.086 0.092Rq 0.365 0.181 0.158 0.127 0.110 0.140Rz 1.257 0.613 0.573 0.383 0.334 0.690Rs 0.518 0.455 0.237 0.005 -0.001 2.270tp 0.259 0.061 0.056 0.017 0.008 0.019Np 0.446 0.481 0.535 0.277 0.184 0.047Sa 0.507 0.154 0.109 0.089 0.067 0.248Ha 0.511 0.368 0.335 0.304 0.296 0.714

Page 25: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations

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Conclusions• The selected surface parameters can

effectively differentiate the level of fabric fuzziness/pilling.

• It provides the characteristic information about fuzz and pills.

• It is independent of fabric structure, color and orientation.

• The scanning is a slow process.