| With the development of electronic textiles,the interconnection technology of electronic components has become increasingly important,and the interconnection part plays a role in transmitting voltage and digital signals.At present,substantial progress has been made in connecting electronic components into clothing,and some methods have emerged that can successfully implant electronic components into clothing.Conductive cables are usually the connecting wires for the electronic components of the aforementioned electronic fabrics.In recent years,there have been some research progress,but there are still certain shortcomings in the research of the structure,conductivity,anti-interference,softness,stretchability,and wearing comfort of conductive cables.Conductive cables implanted on textile substrates must have more flexibility,comfort,tensile recovery,and transmission stability.Therefore,how to achieve the combination of electronic components and textiles,ensure the smooth transmission of communication signals by conductive cables,while also meeting the soft and comfortable wearing process,and reduce the presence of conductive cables during the wearing process,is a new topic in the field of electronic fabric development.In response to the defects of poor softness,poor tensile recovery,and insufficient transmission stability of the conductive cables mentioned above,this project proposes to flatten the conductive cables and use stretchable conductive yarn as the soft conductive cable.Multiple conductive cables are arranged in parallel in the direction of yarn distribution in the woven fabric to prepare a flattened elastic cable ribbon(referred to as cable ribbon in the following part of the paper).And explore the structure,extreme electrical and mechanical properties,force before and after installation,electrical performance,and anti-interference ability of the cable ribbon of the conductive cable,evaluate the transmission effect of the cable ribbon,and the following are the main research contents and results:(1)Exploring the structure of stretchable and stable conductive cable ribbons,by designing conductive yarns and evaluating the forming process and performance,the relationship between the electrical and mechanical properties of the coating parameters was determined,and a technical solution to improve the hardness and poor elasticity of the fabric cable was proposed and verified.Finally,it is determined to be the conductive cable part of the cable ribbon.Firstly,based on the requirements of cable ribbon strength,electrical and data transmission functions,and durability,a metal coated yarn with a core yarn and conductive layer covering structure is designed for conductive cables.For the core yarn of the data cable,from the perspective of cost and flexibility,choose spandex filament with specifications of 840 D-1680 D,and use 8 × 0.06 mm copper wire enameled wire is a conductive material,and six different diameters and surface pitches of metal wrapped yarn are prepared as conductive cable parts in the cable ribbon.Through force and electricity,it is found that the elastic recovery rate of the conductive cable exceeds 98% under 15% fixed length stretching.At the same time,the resistance value of the fabric cable does not exceed 1.0 Ω/m,the voltage attenuation does not exceed 0.1%,and the delay time does not exceed 3.2 ns/m,which has good power and data transmission ability;Before and after the wrapping process,the change in resistance value does not exceed 5.5%,and the change in voltage amplitude does not exceed 0.1%.Moreover,the delay time of the straight wire after spiral wrapping has significantly decreased,indicating good stability in power and data transmission,and even a significant improvement in transmission capacity.(2)The conductive cable part using spandex/copper wire enameled wire wrapped yarn as cable ribbon is designed to achieve better protection of the conductive cable and the tensile recovery of the cable ribbon.The influence of different forms of conductive cables on their mechanical and electrical properties is studied,and the changes in morphology,mechanical properties,and electrical properties before and after flattening of the conductive cable are explored,proving the superiority of the transmission performance of the cable ribbon,Explain the feasibility of using cable ribbon as a transmission component for electronic textile species.By designing a composite fabric structure with a double-layer tubular structure for the conductive cable and a plain weave structure for the non-conductive part,the surface metal wrapped yarn core exposure rate of the cable ribbon after dismounting does not exceed 0.05%,the thickness is about 1.7 mm,and the width is about 1.10 cm.Under 15% fixed length stretching,the elastic recovery rate is above 83%,which can achieve good protection of the conductive cable and meet the needs of daily wearing comfort.The resistance of conductive cables does not change by more than 8.4% before and after flattening,indicating good conductivity stability.(3)Exploring the advantages and disadvantages of transmission performance and reliability of cable ribbon,the evaluation results of data transmission show that the transmission performance of cable ribbon is good,the impact of the installation process on transmission performance is small,the transmission stability is good,and the anti-interference ability is strong.Firstly,evaluate the signal transmission capability of a single conductive cable in the cable ribbon,mainly testing its voltage amplitude and transmission delay time for characterization.The results show that the amplitude attenuation of a single conductive cable in the cable ribbon under low-frequency signal transmission does not exceed 0.15%,and the delay time does not exceed3.01 ns/m,indicating good data transmission ability;At the same time,the voltage amplitude of the cable ribbon before and after the machine operation does not exceed 0.052%,and the delay time changes from 1.385-3.610 ns/m of the conductive cable before the machine operation to1.573-2.135 ns/m of the cable ribbon after the machine operation.It shows that the data transmission performance of the cable is basically the same before and after the cable is installed on the machine,indicating that the cable webbing installation process and the feasibility of being used as a data transmission element.Install other parallel wires near a single wire cable in the cable ribbon mentioned above for simultaneous transmission as crosstalk,and add mobile phone calls as external electromagnetic interference.Explore the transmission stability of cable straps under external interference.When two conductive cables in the cable ribbon are transmitted simultaneously,the voltage amplitude before and after external interference does not exceed 0.37%.At the same time,the delay time after interference decreases significantly,but the signal fluctuation slightly increases.Explain the feasibility of weaving conductive cables into cable straps and the feasibility of using cable straps as electronic components for data transmission.Based on the above discussion and analysis,it has been proven that the weaving scheme and technological feasibility of the flattened elastic ribbon for electronic textile signal transmission cables proposed in this article have the potential to overcome the limitations of flat cables in current applications.The cable ribbon achieves a flattened structure of the conductive cable,achieving a protective structure of the conductive cable and the elastic recovery ability of the cable ribbon.The transmission performance of the cable ribbon is good,and the transmission stability and anti-interference ability during the flattening process of the conductive cable are good.In addition,the weaving method of stretchable conductive cables and cable straps proposed in this project can also be promoted and applied to the interconnection technology of other electronic textiles,providing technical support for promoting the industrial development of intelligent electronic textiles. |
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