Combined power extraction with adaptive power management module for increased piezoelectric energy harvesting to power wireless sensor nodes
Proceedings of IEEE Sensors
Institute of Electrical and Electronics Engineers (IEEE)
(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
This paper, for the first time, presents a combined power extraction with adaptive full analogue power management module (PMM) for increased piezoelectric energy harvesting. The PMM is adaptive to variations in the amplitude and frequency of vibration subjected to the piezoelectric strain energy harvester (SEH) and adaptive to different connected electrical loads, where it is used to power up a wireless sensor node (WSN). The combined power extraction circuit and adaptive PMM allow up to 156 % more power to be harvested from the SEH. The combined circuit harvested 0.55 mW at peak-to-peak strain loading of 200 με at 10 Hz. This feature is especially crucial under low frequency and low vibration amplitude conditions as it greatly improves the power generated from the SEH.
The authors gratefully acknowledge financial support from EPSRC via the project entitled “En-ComE” (EP/K020331/1).
This is the author accepted manuscript. The final version is available from the publisher via the DOI in this record.
IEEE Sensors 2016, 2016-10-30, 2016-11-03, Orlando, Florida