TY - GEN
T1 - Effects of transducers on guided wave based structural health monitoring
AU - Amjad, Umar
AU - Blase, Christopher
AU - Alnuaimi, Hamad N.
AU - Dao, Cac M.
AU - Bereiter-Hahn, Juergen
AU - Kundu, Tribikram
N1 - Funding Information:
Financial support of the Alexander von Humboldt Foundation of Germany to the first and last authors for their visits to Germany to conduct this research is gratefully acknowledged. Hamad N. Alnuaimi acknowledges the support from Qatar University, Qatar.
Publisher Copyright:
© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
PY - 2018
Y1 - 2018
N2 - Lead Zirconate Titanate (PZT) transducers are commonly used to generate guided acoustic waves for health monitoring of structures made of isotropic and anisotropic materials. Therefore, characterization of PZT transducers is very important not only for reliability but also for the accuracy of data. In this research, Scanning Acoustic Microscopy (in reflection mode) at 30 MHz excitation frequency is conducted for determining the quality of disc type guided wave transducers. Multiple samples are scanned but only four transducers are selected for further investigation. Guided waves are dispersive in nature and multiple guided wave modes can coexist at single frequency. It has been already reported in the literature that good bonding condition between transducer and testing material is very important to restrict other factors that can affect the strength of recorded signals. Chirp signal is excited in the specimen in a single sided excitation/detection setup to investigate the effects of transducer quality on monitoring plate like structures. Sideband peak count technique is used for comparative study of transducers.
AB - Lead Zirconate Titanate (PZT) transducers are commonly used to generate guided acoustic waves for health monitoring of structures made of isotropic and anisotropic materials. Therefore, characterization of PZT transducers is very important not only for reliability but also for the accuracy of data. In this research, Scanning Acoustic Microscopy (in reflection mode) at 30 MHz excitation frequency is conducted for determining the quality of disc type guided wave transducers. Multiple samples are scanned but only four transducers are selected for further investigation. Guided waves are dispersive in nature and multiple guided wave modes can coexist at single frequency. It has been already reported in the literature that good bonding condition between transducer and testing material is very important to restrict other factors that can affect the strength of recorded signals. Chirp signal is excited in the specimen in a single sided excitation/detection setup to investigate the effects of transducer quality on monitoring plate like structures. Sideband peak count technique is used for comparative study of transducers.
KW - Damage detection
KW - Fast Fourier Transform (FFT) Side band peak count (SPC)
KW - Guided ultrasonic waves
KW - Lead Zirconate Titanate (PZT)
KW - Non Destructive Testing (NDT)
KW - Scanning Acoustic Microscopy (SAM)
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U2 - 10.1117/12.2300841
DO - 10.1117/12.2300841
M3 - Conference contribution
AN - SCOPUS:85049355208
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Health Monitoring of Structural and Biological Systems XII
A2 - Kundu, Tribikram
PB - SPIE
T2 - Health Monitoring of Structural and Biological Systems XII 2018
Y2 - 5 March 2018 through 8 March 2018
ER -