Single mode Lamb wave phased array beamforming with hybrid PZT-SLDV sensing

Zhenhua Tian; Lingyu Yu

doi:10.1117/12.2045199

10 April 2014 Single mode Lamb wave phased array beamforming with hybrid PZT-SLDV sensing

Zhenhua Tian, Lingyu Yu

Proceedings Volume 9061, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2014; 906136 (2014) https://doi.org/10.1117/12.2045199
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

Abstract

This paper presents a single Lamb mode phased array beamforming by using a hybrid piezoelectric transducer (PZT)-scanning laser Doppler vibrometer (SLDV) system. The array system consists of a surface mounted PZT to generate Lamb waves and a non-contact SLDV to acquire high spatial resolution time-space wavefield remotely. The time-space wavefield contains Lamb waves which can be generated from the PZT excitation, damage scattering, mode conversion, etc. A frequency-wavenumber (f-k) decomposition technique is used to decompose the miscellaneous Lamb waves into individual wave mode components and wave propagations in different directions. The f-k decomposition allows using a single wave component as the phased array input for beamforming. The single mode array beamforming methodology was verified through PZT-SLDV experimental tests on an aluminum plate with a bonded quartz rod as a simulated damage

Citation Download Citation

Zhenhua Tian and Lingyu Yu "Single mode Lamb wave phased array beamforming with hybrid PZT-SLDV sensing", Proc. SPIE 9061, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2014, 906136 (10 April 2014); https://doi.org/10.1117/12.2045199

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