Strain Energy Harvesting Powered Wireless Sensor System Using Adaptive and Energy-Aware Interface for Enhanced Performance
Strain Energy Harvesting Powered Wireless Sensor System Using Adaptive and Energy-Aware Interface for Enhanced Performance
复制标题
DOI：
10.1109/tii.2017.2710313
复制
发表时间：
2017-12-01
影响因子：
12.3
通讯作者：
Zhu, Meiling
中科院分区：
文献类型：
--
作者：
Chew, Zheng Jun;Ruan, Tingwen;Zhu, Meiling
本文提出了一种由应变能量收集器 (SEH) 供电的无线传感器系统 (WSS)，通过引入自适应和能量感知接口 (EAI) 来增强可变振动条件下的性能。该接口由自适应电源管理模块和 EAI 实现，自适应电源管理模块可在不同负载条件下实现最大功率传输，EAI 管理从存储电容器到 WSS 的能量流，以处理所需能量与收获能量之间的不匹配问题。重点是在变振动条件下实现系统的高收集功率和高效率，并以飞机机翼结构作为研究场景。 SEH 供电的 WSS 在 300 至 600 mu e 的不同峰峰值应变负载和 2 至 10 Hz 的振动频率下进行了测试，以验证系统在能量生成和分配方面的性能、系统效率以及为定制开发的 WSS 供电的能力。还进行了使用带和不带接口的不同电路配置的比较研究，以验证所引入的接口的优点。实验结果表明，在10Hz、600μe的施加负载下，SEH在没有接口的情况下产生0.5mW的功率，而在有接口的情况下增加了约670%，达到3.38mW，这凸显了接口的价值。所实现的系统在所有测试条件下的振动测量总体效率为70%至80%，工作时间超过1秒，占空比高达11.85%。
This paper presents a wireless sensor system (WSS) powered by a strain energy harvester (SEH) through the introduction of an adaptive and energy-aware interface (EAI) for enhanced performance under variable vibration conditions. The interface is realized by an adaptive power management module for maximumpower transfer under different loading conditions and an EAI, which manages the energy flow from the storage capacitor to the WSS for dealing with the mismatch between energy demanded and energy harvested. The focus is to realize high harvested power and high efficiency of the system under variable vibration conditions, and an aircraft wing structure is taken as a study scenario. The SEH powered WSS was tested under different peak-to-peak strain loadings from 300 to 600 mu e and vibrational frequencies from 2 to 10 Hz to verify the system performance on energy generation and distribution, system efficiency, and capability of powering a custom-developed WSS. Comparative studies of using different circuit configurations with and without the interface were also performed to verify the advantages of the introduced interface. Experimental results showed that under the applied loading of 600 mu e at 10 Hz, the SEH generates 0.5 mW of power without the interface while having around 670% increase to 3.38 mW with the interface, which highlights the value of the interface. The implemented system has an overall efficiency of 70 to 80%, a long active time of more than 1 s, and duty cycle of up to 11.85% for vibration measurement under all the tested conditions.