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A nanogenerator as a self-powered sensor for measuring the vibration spectrum of a drum membrane

机译：纳米发电机作为自供电传感器，用于测量鼓膜的振动频谱

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摘要

A nanogenerator (NG) is a device that converts vibration energy into electricity. Here, a flexible, small size and lightweight NG is successfully demonstrated as an active sensor for detecting the vibration spectrum of a drum membrane without the use of an external power source. The output current/voltage signal of the NG is a direct measure of the strain of the local vibrating drum membrane that contains rich informational content, such as, notably, the vibration frequency, vibration speed and vibration amplitude. In comparison to the laser vibrometer, which is excessively complex and expensive, this kind of small and low cost sensor based on an NG is also capable of detecting the local vibration frequency of a drum membrane accurately. A spatial arrangement of the NGs on the membrane can provide position-dependent vibration information on the surface. The measured frequency spectrum can be understood on the basis of the theoretically calculated vibration modes. This work expands the application of NGs and reveals the potential for developing sound wave detection, environmental/infrastructure monitoring and many more applications.
机译：纳米发电机（NG）是将振动能转化为电能的设备。在此，成功地展示了一种灵活，体积小，重量轻的NG作为主动传感器，无需使用外部电源即可检测鼓膜的振动谱。 NG的输出电流/电压信号直接测量了局部振动鼓膜的应变，该应变包含丰富的信息内容，例如，振动频率，振动速度和振动幅度。与过于复杂和昂贵的激光振动计相比，这种基于NG的小型，低成本传感器还能够精确检测鼓膜的局部振动频率。膜上的NG的空间排列可以在表面上提供位置相关的振动信息。可以基于理论上计算出的振动模式来理解所测得的频谱。这项工作扩展了NG的应用范围，并揭示了开发声波检测，环境/基础设施监视以及更多应用的潜力。

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