A vibration powered wireless mote on the Forth Road Bridge

Researchers successfully demonstrated the feasibility of harnessing real-world ambient vibrations for wireless structural health monitoring on the UNESCO-listed Forth Road Bridge. By combining direct and parametric resonance, their electromagnetic harvester achieved over 1 mW of average raw AC power from traffic-induced vibrations in a compact device (126 cm³). This energy was sufficient to sustain duty-cycled wireless transmissions, validating the potential for vibration-powered monitoring systems in infrastructure with broadband, intermittent vibration profiles. The study bridges the gap between laboratory prototypes and real-world applications, offering a scalable solution for sustainable structural health monitoring.

Jia, Y., Yan, J., Feng, T., Du, S., Fidler, P., Soga, K., Middleton, C., & Seshia, A. A. (2015). A vibration powered wireless mote on the Forth Road Bridge. Journal of Physics: Conference Series, 660, 12094. https://doi.org/10.1088/1742-6596/660/1/012094