Sustainablemicro-power circuit for piezoelectric energy harvesting tile

Abstract

Piezoelectric energy harvesting tiles are used for converting the power of pedestrian footsteps in to electricity and can be used at themicro- and milli-watt level for storage and powering electronics devices. This paper effectively combines the systems and techniques for developing a sustainable circuit with the self-starting and self-power functions to efficiently store energy and drive low power consumption electronic devices from the piezoelectric energy harvester tile. The main part of the system is 80% efficient impedance matching converter with the self-starting and battery-less operation. The presented circuit has an overall efficiency of 63% and can power a wireless sensor node to transmit the information wirelessly.