Title: A 3D Scanning System for Fabric Fuzziness and Pilling Evaluations
1A 3D Scanning System for Fabric Fuzziness and
Pilling Evaluations
Bugao Xu and Ming Yao
The University of Texas at Austin January 2005
23D Laser Scanning System
Goal to acquire the surface profile of a fabric
and to characterize the surface
roughness. Setup Profile sensor 10um 2-axis
stage 0.5 um/step A/D board 12 bits
3Hardware
Dimension 8 x 8 x 6 inches
4Software
5Samples
- Five knitted fabric (interlock, dark blue) were
washed and dried different cycles. - F5 no fuzz
- F4 low
- F3 medium
- F2 high (a few pills)
- F1 severe ( a lot pills)
6Procedures
- Scan the sample
- Level the surface
- Set the central plane
- Select the offset plane
- Calculate surface parameters
7Scanning
Profiles, 1x1 in2
Surface, 200 DPI
Surface, 400 DPI
8Leveling (B-spline Approximation)
9Leveling
ScannedSurface
B-spline Fit Plane
Leveled Surface
10Offset Plane
Central Planeu0 um
Offset Planeu0.25um
Offset Planeu0.3um
11Surface Roughness(ANSI/ASME B46.1-1985)
Roughness Average RaRoot-Mean-Square Roughness
RqSkewness Rs
12Skewness
13Surface Roughness(ANSI/ASME B46.1-1985)
Ten-point Height Rz
14Surface Roughness(ANSI/ASME B46.1-1985)
Bearing Length Ratio tp Mean Spacing Rsm
15Surface Roughness
Peak Count Np Peak Size Average Sa Peak
Height Average Ha
16F5
17F4
18F3
19F2
20F1
21Pilling
22Results
23Results
24Results
F1 F2 F3 F4 F5 F6
Ra 0.287 0.139 0.123 0.101 0.086 0.092
Rq 0.365 0.181 0.158 0.127 0.110 0.140
Rz 1.257 0.613 0.573 0.383 0.334 0.690
Rs 0.518 0.455 0.237 0.005 -0.001 2.270
tp 0.259 0.061 0.056 0.017 0.008 0.019
Np 0.446 0.481 0.535 0.277 0.184 0.047
Sa 0.507 0.154 0.109 0.089 0.067 0.248
Ha 0.511 0.368 0.335 0.304 0.296 0.714
25Conclusions
- 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.