Design And Development Of Stretchable Sening Fiber Fabric And Study On Its Properties

Optical fiber fabric is a kind of fabric that can actively emit light by weaving polymer optical fiber into textiles.In recent years,polymer fiber optic fabric with lightemitting characteristics has been developed with the continuous integration of optical materials and textile technology.The application of polymer optical fiber in intelligent textiles has gradually increased,and the development of fiber optic fabrics defence lines has gradually changed the direction of functional textiles.However,due to the material characteristics of the optical fiber material,the diversity of fiber optic fabrics on the performance and interaction mode development could be faster.Based on the physical properties of optical fibers,this study applies conductive and elastic yarns to optical fiber textiles from both material and structural aspects.Furthermore,a multilayer weaving structure was designed to investigate and develop a fiber optic fabric with stretchable sensing properties.Based on the above design process and weaving parameters,further orthogonal experiments were designed to investigate the degree of influence of different weaving parameters on the tensile and optical properties of the stretchable sensing fiber optic fabric.By designing orthogonal experiments with three factors and three levels of weaving weft density,tissue structure and pattern size,nine stretchable fiber optic fabrics with different properties were woven.The experiments guided the selection of performance requirements of threedimensional stretchable fiber optic fabrics and the corresponding weaving parameters.For tensile properties,mainly used YG026 electronic fabric strength meter measurement to measure the tensile interval and tensile rate of fabric samples and other properties through the analysis of the fabric tissue structure on the fabric tensile properties of the highest degree of influence,followed by the pattern size,and finally the weft density.The optical properties were mainly tested by CY-1200 C imaging brightness colourimeter.Moreover,the luminescence of optical fiber fabrics with different stretching properties was tested.And the effect of different weaving process parameters on the luminescence conditions of fiber optic fabrics was also investigated.In this paper,the optical properties of optical fiber fabrics are mainly influenced by the fiber’s loss and bending loss.In order to investigate further the influence of weaving parameters on the optical properties,based on the fabric process structure designed in this study,the geometric structure of the fabric modelling and analysis,through theoretical analysis of the fiber yarn path in the fiber fabric under different parameters,to analyze the influence of different weaving parameters on The influence of fiber bending loss under different weaving parameters is analyzed.Based on the above analysis,it can be concluded that the weft density,tissue structure and pattern design of the fabric influence the tensile and optical properties of the stretchable fiber fabric.The tensile and optical properties of the fabric can be further improved by changing the weaving parameters of the fabric.In addition to the stretching and optical properties of the stretchable sensing fiber fabric,the sensing properties of all samples were tested in this project,and the sensing properties such as resistance-stretching rate,cyclic resistance value,sensing sensitivity and linearity were obtained for each of the nine samples.By comparing the combined fabrics’ comprehensive performance,one of the samples that best fits the application scenario was selected for product fabrication.The sample is made into a wearable textile model for knee pads while adding an electronic control system to receive sensing signals from the textile material and control the colour of the optical fiber light emission.The fabric does not require additional electronic device components by providing the sensing signal from the textile material itself.The final product can monitor the posture of the human knee joint,expanding the possibility of applying posture monitoring in medical rehabilitation.