Tragedy of the coulombs: Federating energy storage for tiny, intermittently-powered sensors

Josiah Hester, Lanny Sitanayah, Jacob Sorber

Research output: Chapter in Book/Report/Conference proceedingConference contribution

40 Scopus citations

Abstract

Untethered sensing devices have, for decades, powered all system components (processors, sensors, actuators, etc) from a single shared energy store (battery or capacitor). When designing batteryless sensors that are powered by harvested energy, this traditional approach results in devices that charge slowly and that are more error prone, inflexible, and inefficient than they could be. This paper presents a novel federated approach to energy storage, called UFoP, that partitions and prioritizes harvested energy automatically into multiple isolated smaller energy stores (capacitors). UFoP simplifies task scheduling, enables efficient use of components with differing voltage requirements, and produces devices that charge more quickly under identical harvesting conditions than a traditional centralized approach. We have implemented a UFoP reference design and conducted extensive experimental evaluation, including a short deployment. Our experimental results using an MSP430-based prototype show that UFoP provides as much as 10% more computational availability, and as much as four times more radio availability than the centralized approach. For all applications and energy environments evaluated, UFoP harvested 0.7-10.2% more energy than the centralized equivalent; meaning UFoP adds zero energy overhead.

Original languageEnglish (US)
Title of host publicationSenSys 2015 - Proceedings of the 13th ACM Conference on Embedded Networked Sensor Systems
PublisherAssociation for Computing Machinery, Inc
Pages5-16
Number of pages12
ISBN (Electronic)9781450336314
DOIs
StatePublished - Nov 1 2015
Event13th ACM Conference on Embedded Networked Sensor Systems, SenSys 2015 - Seoul, Korea, Republic of
Duration: Nov 1 2015Nov 4 2015

Publication series

NameSenSys 2015 - Proceedings of the 13th ACM Conference on Embedded Networked Sensor Systems

Other

Other13th ACM Conference on Embedded Networked Sensor Systems, SenSys 2015
CountryKorea, Republic of
CitySeoul
Period11/1/1511/4/15

Keywords

  • Capacitor
  • Embedded system
  • Energy harvesting
  • Federated energy
  • Task coupling

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Tragedy of the coulombs: Federating energy storage for tiny, intermittently-powered sensors'. Together they form a unique fingerprint.

  • Cite this

    Hester, J., Sitanayah, L., & Sorber, J. (2015). Tragedy of the coulombs: Federating energy storage for tiny, intermittently-powered sensors. In SenSys 2015 - Proceedings of the 13th ACM Conference on Embedded Networked Sensor Systems (pp. 5-16). (SenSys 2015 - Proceedings of the 13th ACM Conference on Embedded Networked Sensor Systems). Association for Computing Machinery, Inc. https://doi.org/10.1145/2809695.2809707