A new approach of a piezoelectric vibration-based power generator to supply next generation tire sensor systems

This paper proposes a new design of a vibration-based piezoelectric generator, utilizing mechanical energy within a rolling tired The power generator is adapted to the tire vibration spectra and the superimposed centripetal acceleration. Asymmetric motion stops and. a. metal-piezo bimorph structure allow higher deflections In compressive stress direction of the piezo that it would be possible in tensile stress direction. This significantly improves robustness and Tower output in small designs. In addition, the concept of. a both-side supported beam with center deflection avoids Complicated stiff clamping therefore simplifies integration into plastic sensor housings.., System. behavior and power output. are predicted by a full system: model taking into account the nonlinear behavior: of the spring-mass-system in contact to motion stop. First prototypes demonstrate power generation over a wide speed range and, enable-sensor systems to transmit tire information multiple times per minute.