UAV Planar Acceleration Sensor Based On Single-Electrode Triboelectric Nanogenerator

With the advent of the 5G era,the demand for micro-integrated,wireless mobile,and functionally intelligent sensors is imminent.In this context,various distributed sensors are facing huge challenges.In real life,sensors play a vital role in many fields.Among them,in the field of unmanned aerial vehicle（UAV）,sensor is an important part of measurement and control system as the main tool for information acquisition of control system.The sensor determines the accuracy of the information obtained by the UAV measurement and control system and affects the flight performance of the UAV.Therefore,with the development of the times and the continuous advancement of technology,the requirements for UAV sensors are increasing significantly.A UAV accelerometer is a sensor that measures the acceleration of a drone by detecting the components of gravity in three axes.It plays an important role in the UAV flight control system.In addition to measuring the motion acceleration,its function can also be used to correct the error of the gyroscope to control the UAV better.Although the power consumption of UAV accelerometers is very small,green and sustainable energy will inevitably become the trend of electronic products in the long run.Therefore,the introduction of self-powered technology into UAV accelerometers will also become inevitable.In this article,an arc-shaped triboelectric nanogenerator based on asymmetric electrodes（ASA-TENG）is proposed,which is installed on the UAV as a self-powered acceleration sensor to detect the planar acceleration of the UAV in the cruise state.It has the characteristics of simple structure,small mass,high sensitivity,large detection range,low cost and environmentally friendly.The structure chooses Nylon solid ball as the moving part of ASA-TENG,which has excellent motion characteristics and can convert mechanical motion signal into electrical signal to realize self-powered.In order to realize direction detection in the plane,two ASA-TENG structures are stacked in a cross shape as the x-axis and the y-axis respectively.Each structure is used to detect the components of the actual acceleration on the two axes,and finally the actual acceleration is obtained through the acceleration synthesis principle,which can detect the direction of acceleration accurately.The voltage signal generated by ASA-TENG was used to study the relationship with acceleration.The ASA-TENG accelerometer can detect acceleration from 0.1 m/s2 to 40 m/s2,which has a high sensitivity.Besides,it has a good fitting relationship between the response time and acceleration.Furthermore,the voltage signal amplitude generated by the ASA-TENG structure shows negligible fluctuations after 2000 cycles of continuous operation with excellent durability.Therefore,the ASA-TENG acceleration sensor will be applied in the UAV cruise condition due to its advantages in the future.