Single Piezoelectric Transducer as Strain Sensor and Energy Harvester Using Time-Multiplexing Operation
Single Piezoelectric Transducer as Strain Sensor and Energy Harvester Using Time-Multiplexing Operation
复制标题
基于时分复用操作的单压电换能器作为应变传感器与能量采集器
DOI：
10.1109/tie.2017.2711562
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发表时间：
2017-12-01
影响因子：
7.7
通讯作者：
Dilhac, Jean-Marie
中科院分区：
文献类型：
--
作者：
Chew, Zheng Jun;Ruan, Tingwen;Dilhac, Jean-Marie
本文提出了一个单一的宏纤维复合材料（MFC）压电传感器作为一个多功能设备的应变传感和能量收集的能量收集供电的无线传感系统的背景下，第一次实施。多功能设备通过时分多路复用操作来实现，用于在与不同能量水平相关的不同时隙交替动态应变传感和能量收集功能，即当能量存储中收集的能量不足以为系统供电时，MFC用作能量收集器，用于为存储电容器充电;否则，收集的能量用于为系统供电，并且MFC用作应变传感器以测量动态结构应变。设计并实现了一种电路，以时分复用的方式将单片MFC作为多功能设备进行管理，并通过实验验证了该操作。MFC测量的动态应变在实现的系统匹配的商业应变传感器的引伸计的95.5%至99.99%，因此，所研究的方法可以用于自主结构健康监测的动态应变。
This paper presents the implementation of a single piece of macro fiber composite (MFC) piezoelectric transducer as a multifunctional device for both strain sensing and energy harvesting for the first time in the context of an energy harvesting powered wireless sensing system. The multifunction device is achieved via time-multiplexing operation for alternating dynamic strain sensing and energy harvesting functions at different time slots associated with different energy levels, that is, when there is insufficient energy harvested in the energy storage for powering the system, the MFC is used as an energy harvester for charging up the storage capacitor; otherwise, the harvested energy is used for powering the system and the MFC is used as a strain sensor for measuring dynamic structural strain. A circuit is designed and implemented to manage the single piece of MFC as the multifunctional device in a time-multiplexing manner, and the operation is validated by the experimental results. The dynamic strains measured by the MFC in the implemented system match a commercial strain sensor of extensometer by 95.5 to 99.99%, and thus the studied method can be used for autonomous structural health monitoring of dynamic strain.