Examination of single-substance multiphase material distribution in a cylindrical container using acoustic wavenumber spectroscopy

John R. Rees; Elise Anne C. Koskelo; Niall M. O'Dowd; Eric B. Flynn

doi:10.1117/12.2257356

4 April 2017 Examination of single-substance multiphase material distribution in a cylindrical container using acoustic wavenumber spectroscopy

John R. Rees, Elise Anne C. Koskelo, Niall M. O'Dowd, Eric B. Flynn

Author Affiliations +

Proceedings Volume 10166, Industrial and Commercial Applications of Smart Structures Technologies 2017; 1016603 (2017) https://doi.org/10.1117/12.2257356
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2017, Portland, Oregon, United States

Abstract

This paper explores the use of a steady-state scanning laser Doppler vibrometer (LDV) system for the identification of transition areas between solid, liquid, and gaseous substances in an enclosed container. This technique images lateral surface velocity under the excitation of a single-frequency ultrasonic tone, produced by a piezoelectric actuator. Differences in measured spatial wavenumber at discrete measurement points of a surface scan can be used to detect the boundaries between solid, liquid and gaseous regions of material. We used the LDV system to compare the relative distributions of solid wax, liquid wax, and air in a cylindrical container based on local changes in wavenumber. Through the same methodology, we were able to distinguish the transition between solid and liquid epoxy in a container. Finally, by repeatedly scanning the container during a phase-changing reaction within the container, we established that the system can be used to monitor reactions as they progress.

Conference Presentation

Citation Download Citation

John R. Rees, Elise Anne C. Koskelo, Niall M. O'Dowd, and Eric B. Flynn "Examination of single-substance multiphase material distribution in a cylindrical container using acoustic wavenumber spectroscopy", Proc. SPIE 10166, Industrial and Commercial Applications of Smart Structures Technologies 2017, 1016603 (4 April 2017); https://doi.org/10.1117/12.2257356

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