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首页> 外文会议>Society for Machinery Failure Prevention Technology Meeting; 20050418-21; Virginia Beach,VA(US) >WIRELESS SENSING NODES POWERED BY PIEZOELECTRIC VIBRATION ENERGY HARVESTING DEVICES
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WIRELESS SENSING NODES POWERED BY PIEZOELECTRIC VIBRATION ENERGY HARVESTING DEVICES

机译：压电振动能量收集装置驱动的无线传感节点

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摘要

Wireless sensor networks are gaining attention and becoming a favorable solution in a myriad of applications. However, cable supplied power to such a system may negate its advantages. Though batteries can be used, the time required to change the batteries can be costly. It has been long desired that a truly wireless sensor could be powered by the ambient energy in its environment. Light, heat, and kinetic energy are the most likely ambient energy sources. Of these energy types, only vibration energy is ubiquitous and has a sufficiently energy level in the places where the wireless sensors will be mounted. In this work, we have successfully developed a high efficiency, piezoelectric vibration-energy harvesting device. In addition, this energy-harvesting device is integrated with a low power, wireless-sensing system to provide a fully self-sustained wireless sensing node.rnIt is well known that the highest strain energy level of a mechanical structure can be reached when it's resonating. Therefore, the harvesting device is designed to work around its resonance. Furthermore, in order to accommodate different vibration signals, a 2D0F piezoelectric, harvester with wider peak range is devised. A matched harvesting circuit is designed to efficiently accumulate and store the electric energy generated by the piezoelectric element. The conversion efficiency of our harvester has reached an unprecedented level of over 50%.
机译：无线传感器网络正在引起关注，并在众多应用中成为一种有利的解决方案。但是，向此类系统提供电缆电源可能会抵消其优势。尽管可以使用电池，但是更换电池所需的时间可能会很昂贵。长期以来，人们一直希望真正的无线传感器可以由其环境中的环境能量供电。光，热和动能是最可能的环境能源。在这些能量类型中，只有振动能量无处不在，并且在将要安装无线传感器的地方具有足够的能量水平。在这项工作中，我们成功开发了一种高效的压电振动能量收集装置。此外，该能量收集设备还集成了低功率无线传感系统，以提供完全自持的无线传感节点。众所周知，当机械结构共振时，可以达到机械结构的最高应变能水平。 。因此，收割装置被设计为围绕其共振工作。此外，为了适应不同的振动信号，设计了具有较宽峰值范围的2D0F压电收割机。匹配的收集电路被设计为有效地累积和存储由压电元件产生的电能。我们的收割机的转换效率达到了前所未有的50％以上。

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