Energy harvesting from biting force with thin sheet harvester based on electret and dielectric elastomer
Energy harvesting from biting force with thin sheet harvester based on electret and dielectric elastomer
复制标题
使用基于驻极体和介电弹性体的薄片收集器从咬合力收集能量
DOI：
10.1016/j.nanoen.2022.107357
复制
发表时间：
2022
期刊：
影响因子：
17.6
通讯作者：
Hijikata Wataru
中科院分区：
文献类型：
--
作者：
Ichikawa Kenta;Hijikata Wataru
已经开发了护口器类型的传感器来监测口腔健康。这些传感器预计将用于预防医学;然而，由于电力供应问题，长期监测尚未实现。在这项研究中，开发了一种薄片能量采集器来产生咬合力。建议的采集器由驻极体和介电弹性体，这是嵌入在一个双层护齿和护齿型传感器集成。通过利用介电弹性体由于咬合力而产生的大变形，所提出的采集器甚至可以从诸如咬合力的低频运动产生高输出功率。通过对该收割机的等效电路分析，对设计方案进行了优化。在与咬合力相当的负载下，所制作的护齿采集器产生2.5 μW的能量，是相同条件下压电元件的560倍。进一步的充电和喂食实验表明，所制造的护齿器采集器每5分钟产生足够的电力来传输护齿器传感器测量的数据。这些结果表明，所提出的原则是有效的，作为一种发电方法，在狭窄的空间低频运动。
Mouthguard-type sensors have been developed to monitor oral health. These sensors are expected to be used in preventive medicine; however, long-term monitoring has not been realized owing to problems with their power supply. In this study, a thin-sheet energy harvester was developed to generate a biting force. The proposed harvester consists of an electret and a dielectric elastomer, which are embedded inside a double-layered mouthguard and integrated with a mouthguard-type sensor. By utilizing a large deformation of the dielectric elastomer owing to the biting force, the proposed harvester can generate high output power even from low-frequency movements such as the biting force. The design was optimized based on the analysis of equivalent circuit of the proposed harvester. The fabricated mouthguard harvester produced 2.5 μW under the load equivalent to the biting force, which was 560 times higher than that by piezoelectric elements under the same condition. Further experiments on power charging and feeding demonstrated that the fabricated mouthguard harvester generates sufficient power to transmit the data measured by the mouthguard sensor every 5 min. These results demonstrate that the proposed principle is effective as a power-generation method for low-frequency movements in a narrow space.