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Efficiency enhancement of electromagnetic energy harvesters for high‐rise buildings
Structural Control and Health Monitoring ( IF 4.6 ) Pub Date : 2021-02-24 , DOI: 10.1002/stc.2722
Ka‐Veng Yuen 1 , Lishu Xu 1
Affiliation  

Because the vibration of buildings and bridges is often small in amplitude, low in frequency, and wide in frequency bandwidth, designing a conventional energy harvester with the natural frequency low enough to coincide with the low excitation usually accompany with very large mass and volume. However, it is very important to use portable energy harvester (usually with higher natural frequency) to obtain energy for wireless devices. If portable energy harvesters were used directly on high‐rise buildings, the efficiency would be very low. To solve this problem, we propose a simple device to implement portable energy harvester in high‐rise building application environment with a high efficiency. It is an intermediate spring‐mass system to be installed between the energy harvester and the underlying building. The crux of this device is to enhance the vibration amplitude of the oscillating mass of energy harvesters, so that more energy can be harvested. By changing the degree of freedom (DOF) and stiffness of the intermediate device, the performance of energy harvester can be drastically enhanced. The effects of the parameters of the device for the harvesting performance have been identified using the Lyapunov method, and the conclusion has been verified using four earthquake ground motions. Applications to 100‐story buildings are used to demonstrate the efficiency of the proposed intermediate device. In the illustrative examples, this device can increase the generated energy of linear electromagnetic energy harvester (EMEH) up by several hundred times.

中文翻译:

高层建筑电磁能量收集器的效率提升

由于建筑物和桥梁的振动通常幅度较小,频率较低且频率带宽较宽,因此设计具有自然频率足够低以与低激励相一致的常规能量收集器通常伴随着非常大的质量和体积。但是,使用便携式能量收集器(通常具有更高的固有频率)来获取无线设备的能量非常重要。如果便携式能量收集器直接用于高层建筑,效率将非常低。为了解决这个问题,我们提出了一种简单的设备,可以在高层建筑应用环境中高效地实现便携式能量收集器。它是一个中间弹簧质量系统,将安装在能量收集器和基础建筑物之间。该装置的关键是提高能量收集器的振荡质量的振动幅度,以便可以收集更多的能量。通过更改中间设备的自由度(DOF)和刚度,可以大大提高能量收集器的性能。使用Lyapunov方法确定了设备参数对收割性能的影响,并使用四个地震地面运动验证了结论。通过在100层建筑物中的应用来证明所建议的中间设备的效率。在说明性示例中,此设备可以将线性电磁能量收集器(EMEH)的生成能量增加数百倍。通过更改中间设备的自由度(DOF)和刚度,可以大大提高能量收集器的性能。使用Lyapunov方法确定了设备参数对收割性能的影响,并使用四个地震地面运动验证了结论。通过在100层建筑物中的应用来证明所建议的中间设备的效率。在说明性示例中,此设备可以将线性电磁能量收集器(EMEH)的生成能量增加数百倍。通过更改中间设备的自由度(DOF)和刚度,可以大大提高能量收集器的性能。使用Lyapunov方法确定了设备参数对收割性能的影响,并使用四个地震地面运动验证了结论。通过在100层建筑物中的应用来证明所建议的中间设备的效率。在说明性示例中,此设备可以将线性电磁能量收集器(EMEH)的生成能量增加数百倍。使用Lyapunov方法确定了设备参数对收割性能的影响,并使用四个地震地面运动验证了结论。通过在100层建筑物中的应用来证明所建议的中间设备的效率。在说明性示例中,此设备可以将线性电磁能量收集器(EMEH)的生成能量增加数百倍。使用Lyapunov方法确定了设备参数对收割性能的影响,并使用四个地震地面运动验证了结论。通过在100层建筑物中的应用来证明所建议的中间设备的效率。在说明性示例中,此设备可以将线性电磁能量收集器(EMEH)的生成能量增加数百倍。
更新日期:2021-05-04
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