Development of acoustic-wedge-mode humidity sensor using a wedge with hydroscopic film

Po Hsien Tung*, Che Hua Yang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Anti-symmetric flexural (ASF) modes are anti-symmetric type of guided waves propagating along the tip of wedge-shaped waveguides. While the wedge tips are coated a thin layer of hydroscopic film, the velocity of ASF mode is sensitive the moisture through its contact with the film. This study presents a combined numerical experimental investigation on the effects of moisture for the propagation behaviors of ASF modes. A laser ultrasound technique is applied to measure dispersion spectra of ASF modes propagating along the wedge tips with hydroscopic film under various humidity controlled by a chamber. Finite element simulations are used to simulate the effects of moisture on the dispersion curves of the ASF modes.

Original languageEnglish
Title of host publication2011 IEEE International Ultrasonics Symposium, IUS 2011
Pages1203-1205
Number of pages3
DOIs
StatePublished - 2011
Externally publishedYes
Event2011 IEEE International Ultrasonics Symposium, IUS 2011 - Orlando, FL, United States
Duration: 18 10 201121 10 2011

Publication series

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

Conference

Conference2011 IEEE International Ultrasonics Symposium, IUS 2011
Country/TerritoryUnited States
CityOrlando, FL
Period18/10/1121/10/11

Keywords

  • ASF mode
  • Wedge wave
  • coating
  • dispersion
  • hydroscopic film
  • moisture

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