Damage Detection Method Based on Continuous Wavelet Transformation of Lamb Wave Signals
A damage estimation method based on continuous wavelet transformation (CWT) of the normalized Lamb wave signals is proposed here. Lamb waves are actuated and sensed using piezoelectric (lead zirconate titanate, PZT) transducers arranged in the form of square detection cells on a plate-like structure...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/23/8610 |
| _version_ | 1797546022782631936 |
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| author | M. Saqib Hameed Zheng Li Kaihong Zheng |
| author_facet | M. Saqib Hameed Zheng Li Kaihong Zheng |
| author_sort | M. Saqib Hameed |
| collection | DOAJ |
| description | A damage estimation method based on continuous wavelet transformation (CWT) of the normalized Lamb wave signals is proposed here. Lamb waves are actuated and sensed using piezoelectric (lead zirconate titanate, PZT) transducers arranged in the form of square detection cells on a plate-like structure. Excitation sequences based on pitch–catch and pulse–echo configurations are tested for the same arrangement of the transducers. The possibilities of the existence of damage for each actuator–senor pair are formed by using the normalized coefficient of CWT. The size of the possible damage region is directly controlled through envelopes defined by the coefficients of CWT, and no additional parameter is required to define its size. The aggregate damage image is constructed by the fusion of damage possibilities from all actuator–sensor pairs using damage indices based on conjunctive and compromised fusion schemes. The results indicate that the proposed method can estimate the location and severity of multiple damage with signals directly from the damaged plate, without the need of baseline signals from the undamaged plate, and the time-compensated signals provide better damage imaging than the raw signals. The most accurate and computationally inexpensive combination is the pulse–echo configuration with damage index based on conjunctive image fusion scheme. The method is computationally inexpensive and can be applied for multiple damage estimations in large structures to reduce the evaluation cost and inspection time during on-line structural health monitoring. |
| first_indexed | 2024-03-10T14:24:11Z |
| format | Article |
| id | doaj.art-5092115fb8bd4dcba4816131fc53a8e4 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T14:24:11Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-5092115fb8bd4dcba4816131fc53a8e42023-11-20T23:07:41ZengMDPI AGApplied Sciences2076-34172020-12-011023861010.3390/app10238610Damage Detection Method Based on Continuous Wavelet Transformation of Lamb Wave SignalsM. Saqib Hameed0Zheng Li1Kaihong Zheng2State Key Laboratory for Turbulence and Complex Systems, Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing 100871, ChinaState Key Laboratory for Turbulence and Complex Systems, Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing 100871, ChinaState Key Laboratory for Turbulence and Complex Systems, Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing 100871, ChinaA damage estimation method based on continuous wavelet transformation (CWT) of the normalized Lamb wave signals is proposed here. Lamb waves are actuated and sensed using piezoelectric (lead zirconate titanate, PZT) transducers arranged in the form of square detection cells on a plate-like structure. Excitation sequences based on pitch–catch and pulse–echo configurations are tested for the same arrangement of the transducers. The possibilities of the existence of damage for each actuator–senor pair are formed by using the normalized coefficient of CWT. The size of the possible damage region is directly controlled through envelopes defined by the coefficients of CWT, and no additional parameter is required to define its size. The aggregate damage image is constructed by the fusion of damage possibilities from all actuator–sensor pairs using damage indices based on conjunctive and compromised fusion schemes. The results indicate that the proposed method can estimate the location and severity of multiple damage with signals directly from the damaged plate, without the need of baseline signals from the undamaged plate, and the time-compensated signals provide better damage imaging than the raw signals. The most accurate and computationally inexpensive combination is the pulse–echo configuration with damage index based on conjunctive image fusion scheme. The method is computationally inexpensive and can be applied for multiple damage estimations in large structures to reduce the evaluation cost and inspection time during on-line structural health monitoring.https://www.mdpi.com/2076-3417/10/23/8610structural health monitoringLamb wavecontinuous wavelet transformbaseline-freemultiple damage |
| spellingShingle | M. Saqib Hameed Zheng Li Kaihong Zheng Damage Detection Method Based on Continuous Wavelet Transformation of Lamb Wave Signals Applied Sciences structural health monitoring Lamb wave continuous wavelet transform baseline-free multiple damage |
| title | Damage Detection Method Based on Continuous Wavelet Transformation of Lamb Wave Signals |
| title_full | Damage Detection Method Based on Continuous Wavelet Transformation of Lamb Wave Signals |
| title_fullStr | Damage Detection Method Based on Continuous Wavelet Transformation of Lamb Wave Signals |
| title_full_unstemmed | Damage Detection Method Based on Continuous Wavelet Transformation of Lamb Wave Signals |
| title_short | Damage Detection Method Based on Continuous Wavelet Transformation of Lamb Wave Signals |
| title_sort | damage detection method based on continuous wavelet transformation of lamb wave signals |
| topic | structural health monitoring Lamb wave continuous wavelet transform baseline-free multiple damage |
| url | https://www.mdpi.com/2076-3417/10/23/8610 |
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