Dynamic Measurement of Foam-Sized Yarn Properties from Yarn Sequence Images

Abstract

Unlike the normal sizing method, the foam sizing had been proven to be a low-add-on technology. To investigate the effect of foam sizing, film thickness, sized-yarn evenness, and size penetration rate were necessary to evaluate the performances of foam-sized yarns. However, the conventional image analysis of sized-yarn cross sections primarily relied on artificial testing with a low efficiency. This paper proposed a novel dynamic method to measure the sized-yarn properties including film thickness, sized-yarn evenness, and size penetration rate based on yarn sequence images captured from a moving yarn. A method of dynamic threshold module was adopted to obtain threshold for segmenting yarns in the sequence images. K-means clustering algorithm was applied to segment pixels of the images into yarn and background. To further remove burrs and noise in the images, two judgment templates were carried out to extract the information of yarn core. The film thickness, sized-yarn evenness, and size penetration rate were measured based on the yarn core of each frame in sequence images. In order to compare with the experimental results of the dynamic method, the yarn properties of the same samples were tested by static and artificial testing. Results revealed that the proposed method could efficiently and accurately detect the film thickness, sized-yarn evenness, and size penetration rate.

A novel method for evaluating the slurry coating characteristics of sized yarns based on the starch-iodine color reaction principle and image processing

“…The slurry coating characteristics of samples 1–3 # are exhibited for comparison in Table 6. To further verify the validity of the proposed method (M1), the dynamic measurement method 17 (M2) and yarn cross-section method 15 (M3) were applied to detect the slurry coating characteristics. For the dynamic measurement method, both greige yarns and sized yarns were tested 50 times for each sample.…”

“…In addition, segments in the micron grade were far from representing the slurry coating characteristics of the whole sized yarns. Zhu et al 17 proposed a dynamic measurement for the slurry coating characteristics from yarn sequence images. The slurry coating characteristics were obtained by variation of the yarn diameter between sized yarns and greige ones.…”

Technological Development of a Yarn Grip System for High-Speed Tensile Testing of High-Performance Fibers

“…In-depth knowledge of dynamic material behavior should enable more efficient use of materials while simultaneously preserving the structural integrity of a component under dynamic load. Although there are numerous research activities focused on novel testing methods for textiles as well as for requirement-adapted reinforcing structures in the field of FRP [6][7][8][9][10][11][12][13][14][15], current insight into fiber properties is mainly based on research results according to Wang et al [16,17].…”