A self-powered angle measurement sensor based on triboelectric nanogenerators for slope deformation monitoring and landslides pre-warning

The inclination angle is an important factor for slope deformation monitoring. This paper introduces a self-powered pendulum inclination sensor (PI-TENG) based on triboelectric nanogenerator, which can effectively monitor slope deformation. PI-TENG adopts raster-sliding mode as the main structure. The fabricated PI-TENG, based on a raster-sliding working mode, using the linear relationship between the rotation angle of the monitoring object and the number of output pulses to establish an intuitive rotation signal mapping, which can realize self-powered monitoring of the rotation direction and angle not being affected by the environment (such as temperature and humidity). The corresponding minimum resolution of PI-TENG is 3 degrees and can be further improved by increasing the number of Nylon grids on the stator. Importantly, the sensor has a simple structure and low price, and can realize self-powered monitoring without additional power supply. This work provides new ideas for monitoring slope deformation and early warning of landslides.