@inproceedings{d2480a86049c449fa2c16e02565f49e4,
title = "Change in time-of-flight of longitudinal (axisymmetric) wave modes due to lamination in steel pipes",
abstract = "Investigations with the aid of longitudinal guided waves in cylindrical structures have been regularly carried out for non-destructive evaluation (NDE) and structural health monitoring (SHM). While earlier works concentrated on the amplitude reduction of the propagating waves due to structural anomalies in this work the change in time-of-flight is investigated. Longitudinal (axisymmetric) modes are excited by a PZT (Lead Zirconate Titanate) transducer for detection of any fluctuation or change in the surface of a steel pipe. Propagating waves are analyzed after proper signal processing. To observe the small change in TOF due to lamination on the surface of a steel pipe, cross-correlation technique is used to attain a higher temporal resolution. The experimental technique is discussed and the obtained results are presented in this paper.",
keywords = "Dispersion curve, Fast fourier transform (FFT), Guided ultrasonic waves, Lead zirconate titanate (PZT), S-Transform (ST), Short time fourier transform (STFT), Structural health monitoring (SHM), Time-of-flight (TOF)",
author = "U. Amjad and Nguyen, {Chi Hanh} and Yadav, {S. K.} and E. Mahmoudabadi and T. Kundu",
year = "2013",
doi = "10.1117/12.2009897",
language = "English (US)",
isbn = "9780819494788",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Health Monitoring of Structural and Biological Systems 2013",
note = "SPIE Conference on Health Monitoring of Structural and Biological Systems 2013 ; Conference date: 11-03-2013 Through 14-03-2013",
}