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Efficient, Long-Term Logging of Rich Data Sensors Using Transient Sensor Nodes

Published: 20 September 2017 Publication History

Abstract

While energy harvesting is generally seen to be the key to power cyber-physical systems in a low-cost, long-term, efficient manner, it has generally required large energy storage devices to mitigate the effects of the source’s variability. The emerging class of transiently powered systems embrace this variability by performing computation in proportion to the energy harvested, thereby minimizing the obtrusive and expensive storage element. By using an efficient Energy Management Unit (EMU), small bursts of energy can be buffered in an optimally sized capacitor and used to supply generic loads, even when the average harvested power is only a fraction of that required for sustained system operation. Dynamic Energy Burst Scaling (DEBS) can be used by the load to dynamically configure the EMU to supply small bursts of energy at its optimal power point, independent from the harvester’s operating point. Parameters like the maximum burst size, the solar panel’s area, as well as the use of energy-efficient Non-Volatile Memory Hierarchy (NVMH) can have a significant impact on the transient system’s characteristics such as the wake-up time and the amount of work that can be done per unit of energy. Experimental data from a solar-powered, long-term autonomous image acquisition application show that, regardless of its configuration, the EMU can supply energy bursts to a 43.4mW load with efficiencies of up to 79.7% and can work with input power levels as low as 140μW. When the EMU is configured to use DEBS and NVMH, the total energy cost of acquiring, processing and storing an image can be reduced by 77.8%, at the price of increasing the energy buffer size by 65%.

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    cover image ACM Transactions on Embedded Computing Systems
    ACM Transactions on Embedded Computing Systems  Volume 17, Issue 1
    Special Issue on Autonomous Battery-Free Sensing and Communication, Special Issue on ESWEEK 2016 and Regular Papers
    January 2018
    630 pages
    ISSN:1539-9087
    EISSN:1558-3465
    DOI:10.1145/3136518
    Issue’s Table of Contents
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    Publication History

    Published: 20 September 2017
    Accepted: 01 January 2017
    Revised: 01 December 2016
    Received: 01 June 2016
    Published in TECS Volume 17, Issue 1

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    Author Tags

    1. Energy harvesting
    2. energy efficiency
    3. low power design

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    • (2023)Stateful Energy Management for Multi-Source Energy Harvesting Transient Computing Systems2023 Design, Automation & Test in Europe Conference & Exhibition (DATE)10.23919/DATE56975.2023.10137108(1-6)Online publication date: Apr-2023
    • (2023)A Non-volatile State Retention Unit for Multi-storage Energy Management in Transient Systems2023 9th International Workshop on Advances in Sensors and Interfaces (IWASI)10.1109/IWASI58316.2023.10164471(46-51)Online publication date: 8-Jun-2023
    • (2022)Dataflow Driven Partitioning of Machine Learning Applications for Optimal Energy Use in Batteryless SystemsACM Transactions on Embedded Computing Systems10.1145/352013521:5(1-29)Online publication date: 21-Mar-2022
    • (2022)ViPSN-Pluck: A Transient-Motion-Powered Motion DetectorIEEE Internet of Things Journal10.1109/JIOT.2021.30982389:5(3372-3382)Online publication date: 1-Mar-2022
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    • (2020)Harvesting-Aware Optimal Communication Scheme for Infrastructure-Less SensingACM Transactions on Internet of Things10.1145/33959281:4(1-26)Online publication date: 19-Jun-2020
    • (2020)Power Solutions of A Vibration-Powered Sensor Node2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia)10.1109/IPEMC-ECCEAsia48364.2020.9367791(2513-2519)Online publication date: 29-Nov-2020
    • (2019)DatasetProceedings of the 2nd Workshop on Data Acquisition To Analysis10.1145/3359427.3361910(47-50)Online publication date: 10-Nov-2019
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