Self-sensing cavitation detection in ultrasound-induced acoustic cavitation

Ultrasonics
Kai-Alexander SaalbachJörg Wallaschek

Abstract

The generation of cavitation by ultrasound is used in a large number of processes in different scientific and industrial applications. Chemical reactions are made possible or accelerated by locally occurring high temperatures and pressures generated by the collapse of cavitation bubbles. Mixing or separating substances, emulsification, ultrasonic cleaning, degassing, and microbiological treatment of fluids are some more applications for ultrasonic generated cavitation. In most of these applications, an optical examination of the events within the cavitating medium is not possible. Non-transparent media or closed containers prevent an optical process monitoring. In addition, the use of sensors is often impossible for cost reasons, limited construction space or disturbance of the process. In order to still enable process monitoring, the authors follow a novel approach: the analysis of the electrical signals of the ultrasound transducer used for cavitation generation. The current signal of the ultrasound transducer is inspected for frequency components, known as acoustic cavitation indicators. For this, the time signal is recorded and transferred to the frequency domain for further processing and evaluation. In previous studies, a...Continue Reading

Citations

Feb 29, 2020·Recent Patents on Drug Delivery & Formulation·Mohammed A Alarjah
May 23, 2021·BMC Anesthesiology·Hyun-Chul KimSeung-Schik Yoo
Dec 21, 2021·Ultrasonics Sonochemistry·Pengfei WuLixin Bai

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