Ambient RF Energy Harvesting Sensor Device With Capacitor-Leakage-Aware Duty Cycle Control
Ambient RF Energy Harvesting Sensor Device With Capacitor-Leakage-Aware Duty Cycle Control
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DOI：
10.1109/jsen.2013.2264931
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发表时间：
2013-05
影响因子：
4.3
通讯作者：
Ryo Shigeta;Tatsuya Sasaki;Dương Minh Quân;Y. Kawahara;R. Vyas;M. Tentzeris;T. Asami
中科院分区：
文献类型：
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作者：
Ryo Shigeta;Tatsuya Sasaki;Dương Minh Quân;Y. Kawahara;R. Vyas;M. Tentzeris;T. Asami
在本文中，我们提出了一种软件控制方法，可以最大限度地提高仅由环境射频功率供电的无线传感器网络（wsn）的传感速率。与所有其他能量收集WSN系统不同，射频供电系统对能量管理提出了新的挑战。无线传感器网络节点根据能量的摄取以短间隔重复充电和放电。通常在能量收集系统中，电容器由于其高效的充放电性能和无限的充电循环而用于能量存储。当充电时间过短时，节点更容易出现能量短缺。相反，如果时间过长，则会因电容器泄漏而损失更多的能量。本文介绍了一种针对射频能量收集优化的自适应占空比控制方案。该方法通过考虑泄漏问题来最大化传感速率，这是以前从未在此背景下研究过的一个因素。该控制方案通过综合评估运行可靠性和减少泄漏来提高效率。
In this paper, we present a software control method that maximizes the sensing rate of wireless sensor networks (WSNs) that are solely powered by ambient RF power. Unlike all other energy harvesting WSN systems, RF-powered systems present new challenges for energy management. A WSN node repeatedly charges and discharges at short intervals, depending on the energy intake. Typically in energy harvesting systems, a capacitor is used for energy storage because of its efficient charge and discharge performance and infinite recharge cycles. When the charging time is too short, a node is more likely to experience an energy shortage. On the contrary, if it is too long, more energy is lost because of leakage in the capacitor. In this paper, we introduce an adaptive duty cycle control scheme optimized for RF energy harvesting. This method maximizes the sensing rate by taking into account the leakage problem, a factor that has never been previously studied in this context. Our control scheme improves the efficiency by aggregate evaluation of operation reliability and leakage reduction.