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Wireless Self-Powered Triboelectric-Based Sensor for Real-Time Quantitative Monitoring of Gas-Liquid Mixed Flow
Yang Dong1,2, Nannan Wang3, Zhichen Cao1
1School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, P. R. China.
None:
Wireless flow sensing technologies have attracted significant interest for enabling safe operation and performance optimization in gas-liquid two-phase flow systems. Nevertheless, the real-time quantitative monitoring of liquid flow rates without phase separation remains a considerable challenge. In this work, we present a wireless, self-powered, and real-time quantitative liquid flow measurement system utilizing a gas-liquid electricity generator (GLEG) based on the triboelectric effect. The GLEG features a dual-electrode configuration consisting of an external ring electrode and an internal porous electrode, which efficiently harvests mechanical energy from high-speed continuous gas-liquid mixed flow and converts it into usable electrical power. By integrating a sensor circuit board with a power regulation module, a microcontroller unit, and wireless transmission components, we demonstrate a fully self-sustained sensing system capable of real-time quantitative monitoring in gas-liquid mixed flow environments. Under continuous flow conditions with an air pressure of 0.6 MPa and flow speed of 30 m/s, the system achieves real-time measurement of liquid flow rates in the range of 0-90 mL/min with an accuracy of 95%. This triboelectric nanogenerator-based wireless sensing platform offers a promising approach for in situ parameter analysis and measurement in multiphase flow systems.
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