Ekho: bridging the gap between simulation and reality in tiny energy-harvesting sensors
Ekho: bridging the gap between simulation and reality in tiny energy-harvesting sensors
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Ekho：缩小微型能量收集传感器模拟与现实之间的差距
DOI：
10.1145/2039252.2039261
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Jacob M. Sorber
中科院分区：
文献类型：
--
作者：
Hong Zhang;M. Salajegheh;Kevin Fu;Jacob M. Sorber
收集的能量使长期免维护传感器部署成为可能;然而，随着设备缩小以适应新的应用，能源预算紧缩和电源波动性增加使系统设计人员无法预测其设备在部署时的表现。
本文介绍了Ekho的设计和基于FPGA的初始实现，Ekho是一种记录和仿真能量收集条件的工具，以支持现实和可重复的测试和实验。Ekho使用I-V曲线的抽象--描述相对于电源电压的采集电流的曲线--来准确地表示采集条件，并支持一系列采集技术。早期的原型以0.1mA的精度模拟I-V曲线，并在4.4μs内响应能量条件的变化。
Harvested energy makes long-term maintenance-free sensor deployments possible; however, as devices shrink in order to accommodate new applications, tightening energy budgets and increasing power supply volatility leaves system designers poorly equipped to predict how their devices will behave when deployed.
This paper describes the design and initial FPGA-based implementation of Ekho, a tool that records and emulates energy harvesting conditions, in order to support realistic and repeatable testing and experimentation. Ekho uses the abstraction of I-V curves---curves that describe harvesting current with respect to supply voltage---to accurately represent harvesting conditions, and supports a range of harvesting technologies. An early prototype emulates I-V curves with 0.1mA accuracy, and responds in 4.4μs to changes in energy conditions.