Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (05): 157-162.doi: 10.13475/j.fzxb.20180606406

• Management & Information • Previous Articles     Next Articles

Fiber glass bobbin yarn hairiness detection based on machine vision

JING Junfeng(), ZHANG Xingxing   

  1. School of Electronics and Information, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, China
  • Received:2018-06-20 Revised:2019-02-01 Online:2019-05-15 Published:2019-05-21

Abstract:

In order to realize the automation detection of fiber glass bobbin yarn hairiness,a fiber glass bobbin yarn hairiness detect system based on machine vision was designed. First,image acquisition platform was built to obtain the hairiness images by applying the light source,camera,motor,et al. Then,the region of hairiness was extracted by the Binary large object analysis method,then the moment features of contours and the region features were calculated,and the hairiness classification was performed by combining these features and the support vector machine. Finally,the numbers of different types hairiness were obtained according to the results of classification and the difference of the coordinates between the previous and latter frames. At the same time,the data of the hairiness length in each frame was obtained by the minimum bounding rectangle of the hairiness,and the maximum value was regarded as the corresponding hairiness length. The experimental results show that the system can replace the manual detection of the bobbin yarn hairiness effectively,and the detection of a single bobbin yarn takes less than ten seconds,which can meet the industrial demand.

Key words: fiber glass, machine vision, bobbin yarn, hairiness detection, hairiness classification

CLC Number: 

  • TP391.4

Fig.1

System schematic"

Fig.2

Hairiness images. (a) End hairiness;(b) Loop hairiness; (c) Cross hairiness"

Fig.3

Flow chart of hairiness detection"

Fig.4

Hairiness extraction image. (a) Original image;(b) Otsu threshold image; (c) Border following image;(d) Hough transform image; (e) Hairiness image"

Fig.5

Minimum bounding rectangle of contour. (a) End hairiness; (b) Loop hairiness;(c) Cross hairiness"

Tab.1

Classification results of hairiness"

类别 数量 错分类数 准确率/%
端毛羽 255 16 93.73
毛圈 113 11 90.27
毛夹 48 1 97.92
总数 416 28 93.27

Fig.6

Classification results. (a) End hairiness;(b) Loop hairiness; (c) Cross hairiness"

Fig.7

Misclassification images. (a) Misclassified as loop hairiness; (b) Misclassified as end hairiness; (c) Uneven brightness"

Tab.2

Measure results of hairiness length"

毛羽
类型
长度/mm 误差/mm
人工测量 外接矩形法
端毛羽样本1 13.3 13.0 0.3
端毛羽样本2 32.5 30.6 1.9
端毛羽样本3 4.2 4.2 0
端毛羽样本4 10.8 10.6 0.2
毛圈样本1 3.5 3.2 0.3
毛圈样本2 11.2 10.7 0.5
毛圈样本3 13.6 13.3 0.3
毛夹样本1 5.7 5.7 0
毛夹样本2 23.4 22.8 0.6
毛夹样本3 7.9 7.8 0.1
平均误差 0.42

Tab.3

Detection results of hairiness"

管纱
编号
毛羽数量/根 运行
时间/s
人工检测 本文算法
端毛羽 毛圈 毛夹 端毛羽 毛圈 毛夹
1# 4 0 0 4 0 0 4.12
2# 2 0 0 2 1 0 4.08
3# 0 0 0 0 0 0 4.05
4# 6 2 1 7 2 1 5.83
5# 3 1 0 3 1 0 4.67
6# 0 1 0 0 1 0 4.15
7# 2 0 0 3 0 0 4.64
8# 4 2 0 5 1 0 5.11
9# 9 0 0 9 0 0 5.79
10# 2 1 0 2 1 0 4.98
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