Multifunctional Landslide Displacement Sensor Based on Triboelectric Nanogenerator

Displacement is an important parameter for landslide disaster monitoring. Addressing the limitations of existing landslide displacement sensors that rely on battery or solar power, this study proposes a self-powered rolling multifunctional landslide displacement sensor based on the principle of triboelectric nanogenerator. This sensor can simultaneously measure the displacement and velocity of landslides and can operate stably in environmental temperatures of 0°C to 80°C and relative humidity of 5% to 95%. The experimental results show that the sensor has a displacement measurement range of 0 to 24.4 mm, a velocity measurement range of 0 to 1 mm/s, a minimum resolution of 0.4mm, and a measurement error of less than 3%. Furthermore, the sensor has self-powered capabilities, with a maximum output power of 32.5 nW when connected to a 25 MΩ load. Compared to traditional sensors, this self-powered characteristic makes it more suitable for field landslide monitoring applications.