In this study, a machine vision system was developed to measure the angle of surface fibers on braided preforms produced via the radial braiding method in real time. The system includes an image acquisition device that captures the preform images and a controller unit that manages this device and performs image analysis. A calibration method using a laser sensor and a calibration cylinder was also developed, enabling precise angle measurements across preforms of varying diameter. An image analysis algorithm was proposed that automatically measures the angle using edge detection and autocorrelation techniques. The experimental results confirmed the accuracy of the system in measuring braiding angles on various preforms.
VollbrechtBKohlerCKollochM, et al.
Developing a camera-based measuring system to feedback control the fibre orientation for the braiding process of CFRP. Adv Ind Manuf Eng2021;
3: 100059.
2.
Van RavenhorstJHAkkermanR.Circular braiding take-up speed generation using inverse kinematics. Compos Part A Appl Sci Manuf2014;
64: 147–158.
3.
GuyaderGGaborA, andHamelinP.Analysis of 2D and 3D circular braiding processes: modeling the interaction between the process parameters and the pre-form architecture. Mech Mach Theory2013;
69: 90–104.
4.
LiQChiXJiC, et al.
Off-center braiding process for complex composite preforms based on analysis of the geometric contour model of the mandrel. Text Res J2022;
92: 4845–4859.
5.
WuZShuZKyosevY, et al.
Numerical prediction methodology for tow orientation on irregular mandrels with constant cross-sections. J Compos Mater2019;
53: 1067–1078.
6.
BorisDXavierLDamienS.The tensile behaviour of biaxial and triaxial braided fabrics. J Ind Text2018;
47: 2184–2204.
7.
RawalAPotluriPSteeleC.Geometrical modeling of the yarn paths in three-dimensional braided structures. J Ind Text2005;
35: 115–135.
8.
DuGWPopperP.Analysis of a circular braiding process for complex shapes. J Text Inst1994;
85: 316–337.
9.
ZouQXueWLinJ, et al.
Mechanical characteristics of novel polyester/NiTi wires braided composite stent for the medical application. Results Phys2016;
6: 440–446.
10.
ChiXLiQYanH, et al.
Robot trajectory optimization control of braiding for three-dimensional complex preforms. J Eng Fiber Fabr2021;
16: doi:10.1177/15589250211043226.
11.
HuntAJ.A machine vision system for the real-time fiber orientation measurement of tubular braided preforms. Master’s Thesis, University of Alberta, Canada, 2017.
12.
ZhenkaiWJialuL.Braided angle measurement technique for three-dimensional braided composite material preform using mathematical morphology and image texture. AUTEX Res J2006;
6: 30–39.
13.
HuntAJCareyJP.A machine vision system for the braid angle measurement of tubular braided structures. Text Res J2019;
89: 2919–2937.
14.
PeiLXiaoZGengL, et al.
Surface parameters measurement for braided composite preform based on gray projectionJ Eng Fiber Fabr2019;
14: doi:1558925019887621.
15.
JiyongFYujingZZhongweiW, et al.
Traction control of space tubular shaped mandrel and detection of preform braiding angle. Text Res J2023;
93: 392–408.
16.
HajrasoulihaJNedoushanRJSheikhzadehM, et al.
Theoretical and experimental study of braid pattern in mandrels with arbitrary cross-sections. J Compos Mater2018;
52: 4009–4022.
17.
BeyererJLeónFPFreseC.Machine vision: automated visual inspection: theory, practice and applications.
Berlin:
Springer, 2015.
18.
AhnJKimS.Automated textile circuit generation using machine vision and embroidery technique. Text Res J2022;
92: 1977–1986.
19.
HansTCichoszJBrandM, et al.
Finite element simulation of the braiding process for arbitrary mandrel shapes. Compos Part A Appl Sci Manuf2015;
77: 124–132.
20.
FouladiAJafari NedoushanR.Prediction and optimization of yarn path in braiding of mandrels with flat faces. J Compos Mater2018;
52: 581–592.
