Self-Powered Sensor Based on Triboelectric Nanogenerator for Landslide Displacement Measurement

Landslides are a severe geological disaster that can cause casualties and property damage. Surface deformation displacement monitoring plays a crucial role in landslide monitoring and early warning systems. However, the shortage of power supply at landslide monitoring sites limits the widespread installation of automated landslide displacement monitoring sensors. In this research, we propose a self-powered sensor (displacement monitoring sensor-triboelectric nanogenerator [DIS-TENG]) for monitoring landslide displacement based on the TENG. The DIS-TENG utilizes the principle of frictional electrification and electrostatic induction to convert landslide displacement into voltage signal output, thereby achieving the monitoring of landslide displacement. Test results show that the output voltage of the DIS-TENG is directly proportional to the landslide displacement, and the maximum output voltage is 26.98 V. The measurement range is 1-12 cm, the measurement errors are below 5%, the maximum output power is 9.02 mu W with an external load resistance of 107 ohm, and the sensor operates reliably within a temperature range of 5 degrees C to 85 degrees C and a humidity range of 10%-80%. Compared to traditional landslide displacement monitoring sensors, the DIS-TENG possesses the distinct advantage of not requiring an external power supply. Given the absence of reliable power sources in outdoor working environments, a self-powered sensor is undeniably more suitable for such conditions.