Investigation of cavitation bubble influence on frequency spectrum of fiber optic probe hydrophone output

Koh Kimura, Sou Takeuchi, Yoshikazu Koike

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Authors consider that a reflection type fiber optic probe hydrophone (FOPH) is suitable for the absolute sound pressure measurement under cavitation at high ultrasonic emission like ultrasonic cleaning machine or sonochemical reactor. The precision of the FOPH at higher sound pressure is almost same as the conventional piezoelectric type hydrophone beyond 100kHz. However, the measurement accuracy of the FOPH below 100kHz becomes lower due to cavitation bubbles. The cavitation bubbles give large refractive index variation at the probe point of FOPH. And, hence, impulse distortion appears in the output signal and the measurement accuracy becomes lower. Therefore, the sound measurement below 100kHz has not been examined fully yet. In this report, distortion components of output wave signal in FOPH under cavitation are examined. Moreover, the component caused by cavitation is found.

Original languageEnglish
Title of host publicationIUS 2020 - International Ultrasonics Symposium, Proceedings
PublisherIEEE Computer Society
ISBN (Electronic)9781728154480
DOIs
Publication statusPublished - 2020 Sep 7
Event2020 IEEE International Ultrasonics Symposium, IUS 2020 - Las Vegas, United States
Duration: 2020 Sep 72020 Sep 11

Publication series

NameIEEE International Ultrasonics Symposium, IUS
Volume2020-September
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Conference

Conference2020 IEEE International Ultrasonics Symposium, IUS 2020
Country/TerritoryUnited States
CityLas Vegas
Period20/9/720/9/11

Keywords

  • Cavitation
  • Fiber optic probe hydrophone
  • Harmonics
  • Hydrophone
  • Sound pressure measurement
  • Ultrasonic cleaning
  • Ultrasonic transducer

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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