Energy harvesting methods that use functional materials have attracted interest because they can take advantage of an abundant but underutilized energy source. Most vibration energy harvester designs operate most effectively around their resonant frequency. However, in practice, the frequency bandfor ambient vibrational energy is typically broad. The development of technologies for broadband energy harvesting is therefore desirable. The authors previously proposed an energy harvester, called a flexible piezoelectric device (FPED), that consists of a piezoelectric film (polyvinylidene difluoride) and a soft material, such as silicon rubber or polyethylene terephthalate. The authors also proposed a system based on FPEDs for broadband energy harvesting. The system consisted of cantilevered FPEDs, with each FPED connected via a spring. Simply supported FPEDs also have potential for broadband energy harvesting, and here, a theoretical evaluation method is proposed for such a system. Experiments are conducted to validate the derived model.

中文翻译：

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通过弹簧连接的简单支撑FPED，用于宽带能量收集

使用功能性材料的能量收集方法引起了人们的兴趣，因为它们可以利用丰富但利用不足的能源。大多数振动能量收集器设计在其谐振频率附近最有效地工作。但是，实际上，环境振动能量的频带通常较宽。因此，需要开发用于宽带能量收集的技术。作者先前提出了一种能量收集器，称为柔性压电装置（FPED），它由压电膜（聚偏二氟乙烯）和柔软的材料（例如硅橡胶或聚对苯二甲酸乙二醇酯）组成。作者还提出了一种基于FPED的系统，用于宽带能量收集。该系统由悬臂式FPED组成，每个FPED通过弹簧连接。简单支持的FPED也具有收集宽带能量的潜力，在这里，针对这种系统提出了一种理论评估方法。进行实验以验证导出的模型。