Self-powered communicating wireless sensor with flexible aero-piezoelectric energy harvester

This paper presents an ultra-flexible piezoelectric air flow energy harvester capable of powering a wireless sensor. The method to easily adapt the aero-electric generator wind is presented. In tunnel, different configurations have been tested determine best one for harvesting at low speed. particular, galloping configuration, with addition bluff body free end cantilever which allows improve performance micro-generator by coupling vibrations induced vortices and phenomena. this study, we also present optimize without increasing volume device. effects mechanical electrical several generators on are Thus, parallel four generators, obtained maximum power 60 μW instead 30 two speed about 6 m/s. micro-generators allowed device keep same (≈540 cm3), however threshold increase (>6 m/s). harvested was then used operate