20 April 2012 Modeling and analysis of a biomorph piezoelectric energy harvester for railway bridge monitoring
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Wireless sensor network is one of prospective methods for railway bridge health monitoring. It has drawn much attention due to the long-term operation and low-maintenance performances. However, how to provide power to wireless sensors is a big issue. In railway health monitoring, the idea of converting ambient vibration energy from the vibration of railway track induced by passing train to electric energy has made it an efficient way for powering the wireless sensor networks. In this paper, a bimorph piezoelectric energy harvester from base excitation was investigated in the laboratory, and the energy output of the bimorph energy harvester was predicted by an equivalent single-degree-of-freedom (SDOF) model. Reasonable results have been found between the tested and predicted data. Based on the theoretical model, further works on optimization of the bimorph piezoelectric energy harvester will be performed in future.
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Jingcheng Li, Shinae Jang, Jiong Tang, "Modeling and analysis of a biomorph piezoelectric energy harvester for railway bridge monitoring", Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 834827 (20 April 2012); doi: 10.1117/12.915194; https://doi.org/10.1117/12.915194



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