期刊
ISCIENCE
卷 25, 期 12, 页码 -出版社
CELL PRESS
DOI: 10.1016/j.isci.2022.105673
关键词
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资金
- National Science Fund for Distinguished Young Scholars [61625304]
- Shanghai Sailing Program [20YF1412700]
- Shuguang Program of Shanghai Education Commission [20SG40]
- Shanghai Outstanding Academic Leaders Plan [20XD1421700]
The study proposes a novel energy harvesting device, CSF-TENG, which can act as a self-powered sensor and detect its own damage. Experimental results demonstrate a high accuracy of the defect identification model for the device.
The electric signals of cantilever energy harvesting devices with/without a crack were mainly obtained by external sensors, so detecting device damage on a large scale is difficult. To tackle the issue, a cantilever-structure freestanding triboelec-tric nanogenerator (CSF-TENG) device was proposed, which can scavenge ambient energy and act as a self-powered sensor. Firstly, the relation between the peak-to-peak voltage and amplitude of the CSF-TENG was established. Next, the output performance of the CSF-TENG was measured. Then, depending on electric signals output by the CSF-TENG, a cantilever defect identification model was built by using the wavelet packet and long short-term memory (LSTM) algorithms. The experimental results manifest that the accuracy of the model is about 98.6%. Thus, the CSF-TENG with a crack can be detected timely due to its self-monitoring ability, which is of great significance for the develop-ment of self-powered sensor networks.
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