Diab D, Lefebvre F, Nassar G, Smagin N, Isber S, El Omar F, Naja A
Univ. Polytech. Hauts-de-France, CNRS, Univ. Lille, ISEN, Centrale Lille, UMR 8520 - IEMN, DOAE, F-59313 Valenciennes, France.
Department of Physics, American University of Beirut, Bliss Street, Riad El-Solh, 1107-2020 Beirut, Lebanon.
Rev Sci Instrum. 2019 Jul;90(7):075004. doi: 10.1063/1.5084267.
A new spherical vibrational energy harvesting device with an additional low power management circuit for optimizing the power transfer from the mechanical vibrations to a storage capacitor is presented. The device is devoted to underwater wireless sensor network applications due to its broadband vibrational energy harvesting, sensing, and communicating facilities. The sensing node container consists of two acrylic glass (PMMA) half-spherical shells and a Pz26 piezoelectric ring clamped between the shells. The energy harvesting, the management circuit, and communication electronics were fitted within the hollow portion of the sphere. A simulation model of the energy extraction and management system using spice has been developed. This simulation shows the feasibility and efficiency of the low power extraction circuit; a level of the necessary stored voltage was set at 3 V. The numerical model was validated by underwater experimental measurements; a voltage of 3 V was obtained at the terminals of a storage capacitor (47 µF) which was sufficient to supply the communication electronics. Power harvesting performances were measured relative to the transmitter/sensor distance and the incident acoustical field excitation voltage. Finally, 175 µW of harvested power has been measured with an excitation voltage of 8 Vpp at 5 cm distance from the emitter.
本文提出了一种新型球形振动能量收集装置，该装置带有一个额外的低功耗管理电路，用于优化从机械振动到存储电容器的功率传输。由于其具备宽带振动能量收集、传感和通信功能，该装置专门用于水下无线传感器网络应用。传感节点容器由两个丙烯酸玻璃（聚甲基丙烯酸甲酯）半球形外壳和夹在外壳之间的Pz26压电环组成。能量收集装置、管理电路和通信电子设备安装在球体的中空部分。利用spice开发了能量提取和管理系统的仿真模型。该仿真展示了低功耗提取电路的可行性和效率；设定所需存储电压为3V。通过水下实验测量对数值模型进行了验证；在存储电容器（47μF）的端子上获得了3V的电压，该电压足以供应通信电子设备。相对于发射器/传感器距离和声场入射激励电压测量了功率收集性能。最后，在距离发射器5cm处，8Vpp的激励电压下测量到了175μW的收集功率。
