| With the rapid development of information technology,flexible intelligent wearable electronic devices gradually enter people’s vision.At present,wearable electronic devices such as smart bracelets and VR glasses have been widely used in human-machine interaction systems with various modes such as action recognition,heart rate monitoring and game control.However,due to the need for battery power,traditional wearable electronic devices are often heavy,which requires frequent charging and battery maintenance or replacement.These problems greatly reduce the convenience and practicability of wearable electronic devices,hindering their popularity.The mechanical energy generated by human movement is often ignored.The triboelectric nanogenerator can effectively collect this low-frequency mechanical energy and convert it into electrical energy as a power source for small electronic devices or as a highly sensitive self-driven sensor.At the same time,triboelectric nanogenerator also has a wide selection of materials,simple structure design and other advantages.Compared with thin film and other flexible materials,textiles have many natural advantages such as permeability and moisture,softness and light weight,and can still maintain excellent comfort in the long-term wearing process.Therefore,the combination of textiles and triboelectric nanogenerators as wearable human-machine interaction devices has a very broad application prospect.In this paper,based on the principle of triboelectric nanogenerator and knitting fully-formed technology,the air-layer and plating stitch triboelectric sensor is designed and prepared to be used in the human-machine interaction interface of various modes.The specific research contents are as follows:Firstly,this topic designs and prepares a fabric with air-layer and plating stitch structure based on triboelectric nanogenerator.This three-layer fabric is composed of air-layer structure and plating stitch structure.The output electrical signal is generated through contact separation motion between two dielectric layers inside the fabric.Furthermore,the knitting structure based on the triboelectric nanogenerator was designed and integrated into the knitting clothing by using the knitting fully-formed technology.The intelligent knitting knee and elbow pads and intelligent knitting gloves based on the triboelectric electric air-layer and plating stitch were prepared.Second,test the wearability of triboelectric air-layer and plating stitch knitted fabric,the working principle of the fabric triboelectric nanogenerator is presented systematically,the effects of different knitting parameters and testing conditions on the electrical properties of triboelectric fabrics were investigated,explore the triboelectric fabric under different external loads of peak power density,test and analysis the durability and washing resistance of triboelectric fabric.The energy harvesting properties of the triboelectric fabric were also characterized.Finally,the application of triboelectric sensor based on air-layer and plating stitch structure in human-machine interaction is explored.The human-machine interaction recognition and monitoring system is built.Intelligent knitted knee and elbow pads can be used to monitor human movement posture and movement frequency.With the help of machine learning,intelligent knitted gloves can achieve accurate recognition of 100 numbers from "0" to "99",and the recognition accuracy can reach 94.4%.The intelligent wireless control system of human-machine interaction is built.The intelligent knitted glove can not only accurately control the bending and stretching movement of the finger joints of the bionic manipulator,but also control the performance of the self-developed virtual piano "K-Piano" mobile application software,showing the excellent control ability of intelligent knitted glove in multi-dimensional human-machine interaction. |
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