A differential method for the determination of the time-of-flight for ultrasound under pulsed wide band excitation including chirped signals

K. S. Tarar; R. Meier; E. Twerdowski; R. Wannemacher; W. Grill

doi:10.1117/12.776158

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10 April 2008 A differential method for the determination of the time-of-flight for ultrasound under pulsed wide band excitation including chirped signals

K. S. Tarar; R. Meier; E. Twerdowski; R. Wannemacher; W. Grill

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Proceedings Volume 6935, Health Monitoring of Structural and Biological Systems 2008; 693519 (2008) https://doi.org/10.1117/12.776158
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2008, San Diego, California, United States

Abstract

For applications involving the determination of variations of the time-of-flight in pulsed echo or transit experiments a method has been developed based on Fourier transformation with forced optimized compression of the reference signal to an only bandwidth limited approximation of a Dirac-function. The respective transformation of time shifted response signals allows the effective separation of otherwise overlapping signals and the detection of differences in the time-of-flight for the individual components with high resolution. The developed processing scheme corrects for dispersion and attenuation in the electronics, the transmission lines, and the transducers. The method is presented and applications are demonstrated.

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K. S. Tarar, R. Meier, E. Twerdowski, R. Wannemacher, and W. Grill "A differential method for the determination of the time-of-flight for ultrasound under pulsed wide band excitation including chirped signals", Proc. SPIE 6935, Health Monitoring of Structural and Biological Systems 2008, 693519 (10 April 2008); https://doi.org/10.1117/12.776158

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