Volumetric loss quantification using ultrasonic inductively coupled transducers

Peng Gong; Thomas R. Hay; David W. Greve; Irving J. Oppenheim

doi:10.1117/12.2084390

27 March 2015 Volumetric loss quantification using ultrasonic inductively coupled transducers

Peng Gong, Thomas R. Hay, David W. Greve, Irving J. Oppenheim

Proceedings Volume 9435, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2015; 943514 (2015) https://doi.org/10.1117/12.2084390
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2015, San Diego, California, United States

Abstract

The pulse-echo method is widely used for plate and pipe thickness measurement. However, the pulse echo method does not work well for detecting localized volumetric loss in thick-wall tubes, as created by erosion damage, when the morphology of volumetric loss is irregular and can reflect ultrasonic pulses away from the transducer, making it difficult to detect an echo. In this paper, we propose a novel method using an inductively coupled transducer to generate longitudinal waves propagating in a thick-wall aluminum tube for the volumetric loss quantification. In the experiment, longitudinal waves exhibit diffraction effects during the propagation which can be explained by the Huygens-Fresnel principle. The diffractive waves are also shown to be significantly delayed by the machined volumetric loss on the inside surface of the thick-wall aluminum tube. It is also shown that the inductively coupled transducers can generate and receive similar ultrasonic waves to those from wired transducers, and the inductively coupled transducers perform as well as the wired transducers in the volumetric loss quantification when other conditions are the same.

Citation Download Citation

Peng Gong, Thomas R. Hay, David W. Greve, and Irving J. Oppenheim "Volumetric loss quantification using ultrasonic inductively coupled transducers", Proc. SPIE 9435, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2015, 943514 (27 March 2015); https://doi.org/10.1117/12.2084390

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