Optical fiber strain sensor used in micro-strain process monitoring of textile engineering fabrics

The textile engineering major includes two directions: textile trade and textile clothing. This major trains senior engineering and technical personnel with knowledge and ability in textile engineering, who can be engaged in textile design and development, textile process design, textile production quality control, production technology transformation, and preliminary management capabilities in textile enterprises, scientific research, teaching and other departments .

Micro strain is the ratio of the deformation to the original size, expressed by ε, that is, ε=ΔL/L, dimensionless, usually expressed as a percentage; micro strain is also used to indicate the degree of deformation of the deformation, but it is used to describe the extremely small deformation , Expressed in με, 1 με=(ΔL/L) 10 ^{(-6), that is, ε=10} 6 με, that is to say, micro strain is one millionth of strain.
Textile engineering usually has directions: textile technology design direction, knitting and clothing direction, textile inspection and business direction, textile design direction, textile international trade direction, textile mechatronics direction, textile industry management and evaluation direction, high-tech textiles Direction, non-woven fabric direction; and traditional cotton or wool textile direction.
Textile as a technical science, the research object is the fiber assembly and the mechanical (physical, mechanical) and chemical methods used in processing. In order to live, people first have to eat, and second, they have to dress. Since ancient times, except for fur and leather, almost all clothing materials have been textiles. As a production, textile in a narrow sense refers to spinning and weaving; textile in a broad sense also includes primary processing of raw materials, silk reeling, dyeing and finishing, and even chemical fiber production. In addition to clothing, textile products are also used for viewing and packaging. In modern times, it is also used in home decoration, industrial and agricultural production, medical treatment, national defense, etc. The method and technique to solve the practical problems of textile production is textile technology. The system of basic laws that people master on this basis constitutes textile science.
Spinning is the process of completing fiber orientation along the axis. Before spinning, the fiber material undergoes preliminary processing to remove impurities, but the internal fibers have a certain horizontal (left and right side by side) relationship with each other. For example, in cotton, wool, hemp and other fibers, there are still a small range of bundles and clumps, and the silk in the cocoons is in a figure-eight ring. After spinning into yarn, the fibers must be as straight and parallel as possible, and generally oriented along the axis of the yarn, and the end to end is connected to form a longitudinal connection. After the warp and weft yarns form the fabric, the fibers are oriented according to the length and width of the fabric respectively, that is, "vertical and horizontal orientation". Knitting is through the looping and stringing process of yarns, so that the fibers in it also form a "vertical and horizontal orientation", but they are formed by the same group of yarns. In addition to orientation, weaving also has an element of artistic processing (flower weaving).
To sum up, opening is the preliminary loosening; combing is the basic completion of the loosening and at the same time the preliminary assembly; the drafting is the final completion of the loosening, while basically reaching the assembly; the addition is the final consolidation of the assembly. This process can be represented by the following sketch: The above-mentioned function is the basic function of all spinning methods so far. Spinning is not limited to these functions. There are also cleaning (removing impurities), combing (removing short, removing impurities), and merging, etc., which can help improve the quality of the product, but it is not decisive for whether the yarn can be formed. Influence, so it is a supporting role. Another function is winding, including rolling, packing, winding, winding, twisting, etc., in order to connect the front and back processes, so as to solve the contradiction between the continuity of the production process and the discontinuity of the process. The winding has no direct relationship with the yarn quality or the quality of the yarn. When the former and latter two processes are continuously completed, the winding in between can be omitted. But when continuity is temporarily impossible, winding is still an essential insertion process.

Finally, I recommend an optical fiber sensor used in the monitoring of the micro-strain process of textile engineering fabrics. The high-quality optical fiber strain sensor introduced by Gongcai.com from abroad-FOS-N, FOS-N is a fiber optic stress sensor, which is a composite material engineering Research and industrial applications, such as buildings, bridges, tunnel linings, supporting structures, ships and power transformers and other structural health monitoring ideal products. FOS-N strain sensor has the characteristics of small size, high accuracy, immunity to EMI/RFI interference, corrosion resistance and high temperature resistance. Based on the recognized Fabry-Perot interference technology, FISO's fiber optic strain sensor is a good choice for high-performance strain measurement. The product technology based on FOS-N and the supporting compatible monitoring system enable users to measure strain at long distances without affecting the reliability of readings. The FOS-N strain sensor is insensitive to the stretching and processing of any fiber to be used. If the sensor is embedded in a composite material, the above characteristics can become a very advantageous advantage. The FOS-N fiber optic strain sensor can work normally in harsh chemical environments. At the same time, it has a solid structure and high flexibility, which can meet the current high-performance composite material research and civil structure monitoring requirements.