Self‐Powered Intelligent Damper Integrated Triboelectric‐Electromagnetic Hybrid Unit for Vibration In Situ Monitoring of Stay Cables

Abstract

Monitoring and controlling the vibration of bridge cables can maintain the health of the bridge structure and prolong the service life. This work proposes a novel self‐powered intelligent damper (SID) integrated triboelectric‐electromagnetic hybrid unit for vibration in situ monitoring of stay cables. Among them, the sensing function of the SID is realized by an arched membrane triboelectric nanogenerator (AM‐TENG), and the energy harvesting is realized by a three‐phase electromagnetic generator (TP‐EMG). The working principle and performance are investigated. Rotating and linear experimental platforms are built to verify the SID's low‐frequency (0.25–1.50 Hz) performance, including sensing, power generation, and vibration reduction. The experimental result indicates that the fitting vibration speed coefficient of the bridge cable with the AM‐TENG signal frequency is 0.990. In addition, the TP‐EMG achieves a peak power of 1.21 W. At 0.1 A power supply, the SID can output a damping force of 50 N. Finally, an experimental system is constructed to verify the viability of the SID in bridge cable vibration monitoring and vibration reduction. This work provides a feasible solution for further optimizing the bridge structure health monitoring and maintenance system.

A Triboelectric–Electromagnetic Hybrid Generator for Harvesting River Energy and Wind Energy for River Ecosystem Monitoring

“…Wang et al introduced a structure centered on triboelectrification and electrostatic induction coupling within the low-frequency range known as the triboelectric nanogenerator (TENG). − TENGs exhibit attributes such as elevated resistance, elevated voltage, reduced current, and exceptional conversion efficiency. − However, the energy harnessed by TENG at low frequencies remains notably restricted and insufficient for sustaining sensor power requirements. − Conversely, electromagnetic generators (EMG) make use of electromagnetic induction phenomena for electricity generation and offer characteristics such as decreased resistance, increased current, diminished voltage, and dependable output. , Hybrid nanogenerators that integrate triboelectric nanogeneration and electromagnetic power generation technologies can effectively harvest energy to power IoT nodes and sensors, while also facilitating the sensing of river ecosystems. , …”