Research On Motion Tracking Based On Self-powered Nano-generators

With the rapid development of nanogenerator technology,more and more attention has been paid to intelligent motion sensors,wearable electronic devices and human-machine interaction.Due to the limited external power and volume,traditional motion sensors are not wearable and flexible,which is the characteristic of modern intelligent sensors.The nanogenerator,based on the PVDF membrane of electrospinning technology,has the advantages of self-power supply and good environmental adaptability.As a result,it becomes a research hotspot in the field of intelligent motion sensors.Based on the theoretical research and preparation methods of nanogenerators,this paper studies the feasibility of using flexible nanogenerator as a motion sensor and the practical application of motion tracking under human body motion.proposes a matrix motion sensor that can collect and monitor human motion energy,and explores its application in the field of wearable electronic equipment and human-computer interaction.The paper consists of the following contents:Firstly,the basic morphology of PVDF nanofiber membranes is analyzed,investigating the piezoelectric effect and working principle of nanogenerators.The piezoelectric and thermoelectric signal characteristics of flexible nanogenerators were analyzed.Furthermore,an independent motion sensor unit was designed based on such flexible nanogenerators,towards which different PH and humidity tests were carried out,proving the excellent environmental adaptability of the device.A tactile motion sensor based on the two-dimensional planar system was constructed,and its self-powered and motion tracking capabilities were checked.The potential of the application of flexible nanogenerators based on PVDF membrane in energy supply for miniature motion sensor devices and the monitoring of the motion state of target objects was explored.Secondly,a matrix motion sensor based on PVDF membrane was designed.The synchronization test of the sensor's independent unit was operated,which was shorter than traditional sensor,that is,0.1 second.By mapping external mechanical stimuli to electrical output signals,the dynamic response can be monitored in real time.The output performance of matrix motion sensor was tested in different states,analyzing the effects of the current multiplication characteristics and the effective area on the output and the mechanical durability of the motion sensor unit.In addition,the application prospect of the flexible piezoelectric nanogenerator based on PVDF membrane in the field of human body motion tracking and human-computer interaction was demonstrated.Lastly,the paper discussed the practical application of flexible nanogenerators.In the application of human body motion energy harvesting,the relationship between charging voltage and time in the process of using human body motion energy to charge the capacitor was studied.In the application of human body motion monitoring,the feasibility of flexible nanogenerator as a wearable device to achieve angle sensing was discussed.Through the design of electronic skin and human-computer interaction testing,the great potential of flexible nanogenerator in motion state monitoring and human health was revealed.