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Smart Structures and Systems Volume 9, Number 1, January 2012 , pages 21-33 DOI: https://doi.org/10.12989/sss.2012.9.1.021 |
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Damage localization in plate-like structure using built-in PZT sensor network |
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Xinglong Liu, Chengxu Zhou and Zhongwei Jiang
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| Abstract | ||
| In this study, a Lamb-wave based damage detection approach is proposed for damage localization in plate. A sensor network consisting of three PZT wafer type actuators/sensors is used to generate and detect Lamb waves. To minimize the complication resulted from the multimode and dispersive characteristics of Lamb waves, the fundamental symmetric Lamb mode, S0 is selectively generated through designing the excitation frequency of the narrowband input signal. A damage localization algorithm based upon the configuration of the PZT sensor network is developed. Time-frequency analysis method is applied to purify the raw signal and extract damage features. Experimental result obtained from aluminum plate verified the proposed damage localization approach. | ||
| Key Words | ||
| damage localizations; structural health monitoring; Lamb waves; piezoelectric sensors; timefrequency analysis. | ||
| Address | ||
| Xinglong Liu : National Engineering Laboratory for System Integration of High Speed Train (South), CSR Qingdao Sifang, Co., Ltd, Qingdao, China Chengxu Zhou and Zhongwei Jiang : Department of Mechanical Engineering, Engineering Faculty, Yamaguchi University, Ube, Japan | ||