Liquid-level sensing by trapped-energy mode of backward-wave-type thickness vibration

Author

Yamada, Ken ; Seto, Shuichi

Author_Institution

Grad. Sch. of Eng., Tohoku Gakuin Univ., Miyagi, Japan

fYear

2010

fDate

11-14 Oct. 2010

Firstpage

1439

Lastpage

1441

Abstract

The authors have presented a new technique that employs a piezoelectric thickness vibrator operating in a trapped energy mode for detecting a small-scale variation in liquid level. In this study, the feasibility of applying backward-wave-type energy trapping to liquid level sensing is investigated. It has been found that backward-wave-type energy trapping shows a sensing property slightly different from those obtained using conventional trapped-energy modes. Gradual variations in resonance characteristics with liquid level have been observed for backward-wave-type energy trapping when the liquid surface is in the surrounding electroded region.

Keywords

backward wave tubes; electric sensing devices; level measurement; piezoelectric devices; backward wave type thickness vibration; liquid level sensing; piezoelectric thickness vibrator; resonance characteristics; sensing property; small scale variation; trapped energy mode; Acoustics; Charge carrier processes; Dispersion; Electrodes; Resonant frequency; Sensors; Vibrations; Backward-wave mode; Energy-trapping; Liqid level sensor; Piezoelectric resonator; Piezoelectric sensor;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2010 IEEE

Conference_Location

San Diego, CA

ISSN

1948-5719

Print_ISBN

978-1-4577-0382-9

Type

conf

DOI

10.1109/ULTSYM.2010.5935607

Filename

5935607