A geo-remote IoT seismic sensing device, made of robust high-sensitivity TENGs

J. Sánchez Del Río Sáez, A. Yusuf, I. Astarloa Olaizola, L. Urbelz López-Puertas, J.L. Jiménez Sánchez, V. Martínez, Y. Ballesteros, R. Giannetti, J.B. Bravo Monge, J.V. Cantavella Nadal, C. González González, X. Chen, D.Y. Wang

1st Meditterranean Geosciences Union Annual Meeting - MedGU-21, Istanbul (Turkey). 25-28 noviembre 2021

Summary:

This work presents the best TENG (Triboelectric Energy NanoGenerator) candidate to be used as a seismic sensor and integrated into any global seismic network. Toe most optimal one out of six different compositions' was made of PPA-PEI: PVDF with 10% of PPA, which is flame retardant and has a very low dynarnic resolution. Oscillations with an Instrom electromechanical machine in the range of (0.5-50 Hz) were generated and tested with the PVDF-based TENG. An estimated sensitivity of 250 pulses/s was calculated, and the electrical power density was measured at 100 mW/m2 Pulses were Wi-Fi transmitted following the LoRA protocol. After being analyzed, they were received and decoded in The Things of Stack platform (TTS). Simulations of real ground motions caused by seismic waves were performed by hand-tapping the surface of a table on which a TENG was fixed with a calibrated metallic weight (inercial mass) resting on its upper surface. Pulses generated by the TENG were detected with a high-resolution DAQ, and the frequency spectrum was studied. In addition, they were tested in a triaxial vibrating platform with micro­electromechanical sensors (MEMS), giving very simi­lar results. Toe possibility that hundreds of these low-cost TENGs are integrated into seismic networks, and that frequency spectra and pulse shapes generated by seismic waves can be monitored anywhere in the globe makes this application one of the most relevant in the geo-remote sensing field. 

Spanish layman's summary:

Este estudio presenta un TENG (NanoGenerador de Energía Triboeléctrica) como un sensor sísmico para redes globales. La composición óptima, PPA-PEI: PVDF con un 10% de PPA, muestra resistencia al fuego y baja resolución dinámica. Genera 250 pulsos por segundo con una densidad de potencia estimada de 100 mW/m2. Estos TENG de bajo costo pueden mejorar la detección remota de movimientos sísmicos en todo el mundo

English layman's summary:

This study introduces a TENG (Triboelectric Energy NanoGenerator) as a seismic sensor for global networks. The optimal composition, PPA-PEI: PVDF with 10% PPA, exhibits flame retardancy and low dynamic resolution. It generates 250 pulses/s with an estimated 100 mW/m2 power density. These low-cost TENGs can enhance geo-remote sensing by monitoring seismic waves worldwide.

Keywords: Geo-remote • Seismic TENG • LoRA protocol • Seismic waves • Hazardous environment • loT

DOI: https://doi.org/10.1007/978-3-031-43218-7_61

Publication date: November 2021.

Citation:
Sánchez Del Río Sáez, J., Yusuf, A., Astarloa Olaizola, I., Urbelz López-Puertas, L., Jiménez Sánchez, J.L., Martínez, V., Ballesteros, Y., Giannetti, R., Bravo Monge, J.B., Cantavella Nadal, J.V., González González, C., Chen, X., Wang, D.Y., A geo-remote IoT seismic sensing device, made of robust high-sensitivity TENGs, 1st Meditterranean Geosciences Union Annual Meeting - MedGU-21, Istanbul (Turkey). 25-28 November 2021.

IIT-21-329C