Research on the Folding Spring Triboelectric Nanogenerator for Rock Climbing Trajectory and Time Monitoring

Abstract

The monitoring data of climbing trajectory and climbing time in rock climbing training are the basis for coaches to select athletes and formulate the next training plans. This article proposes a folding spring triboelectric nanogenerator that can be used for trajectory training and time training in rock climbing training. The folding spring triboelectric nanogenerator, made of PMMA (polymethyl methacrylate), Kapton, PTFE (Polytetrafluoroethylene), Cu (copper) and PLA (polylactic acid), realizes the detection functions based on the voltage pulse generated by the vertical friction between each two adjacent friction layers, and then the width of the output voltage pulse is the training time and the envelope of the space area formed by all the contacted folding spring triboelectric nanogenerator is the climbing trajectory. Test results show that the output voltage amplitude are between 7.5 V and 10.8 V, the output current will drop sharply from 24.5 × 10-7 A when the load resistance exceeds 47k ohms, the time interval between two consecutive uses should be greater than 0.2 s, and the maximum output power is 163.6 × 10-8 W when a 4.7×106 ohm load resistance is connected in series, which shows a strong signal-to-noise ratio and anti-interference ability. In addition, the trajectory training and the time training tests results show that the folding spring triboelectric nanogenerator can be used for real-time monitoring in rock climbing training, but it needs to be pressed twice in succession when used for time training limited by the structural and principle.