A low-cost flexible triboelectric sensor based on paper-based conductive silver paste is designed to solve the problems of complex fabrication process,high cost and insufficient environmental protection.When the external force increases from 5～50N,the output voltage and output current gradually increase.Under the external force with a frequency of 1 Hz and an amplitude of 50 N,the peak output voltage is about 7.52 V.When the external pressure increases from 17～173 kPa,the peak output voltage has a piecewise linear relationship with the pressure.When the frequency of the external force changes,the output voltage remains constant.The results show that the sensor has good performance in pressure sensing.When the sensor is applied in motion sensing,the sensor can sense the bending angle of the elbow and wrist joints.And it can effectively distinguish three types of movement,such as walking,fast walking and running,as well as three kinds of fitness movements,such as tip-toe,squat and belly jump,it can calculate the frequency of human walking and the number of fitness movements.The sensor has good application value in the field of human motion state monitoring.
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