Doubly rotated resonators for sensing the properties of liquids

Author

Kim, Yoonkee ; Vig, John R. ; Ballato, Arthur

Author_Institution

Res. Dev. & Eng. Center, US Army Commun.-Elecron. Command, Fort Monmouth, NJ, USA

Volume

1

fYear

2003

fDate

5-8 Oct. 2003

Firstpage

52

Abstract

When a doubly rotated resonator is operated in a liquid, the displacement of the surface is partly out of the plane of the plate of the resonator. The out-of-plane component of the displacement propagates a damped compressional wave into the liquid, while the in-plane component propagates a damped shear wave. In this paper, we report the measurements of the series resonant frequency and the motional arm resistance of doubly rotated quartz resonators (θ≈35° and φ=7°) in liquids to compare with singly rotated AT-cut resonators (θ≈35° and φ=0°). A modified Butterworth-Van Dyke (BVD) equivalent circuit model is suggested to analyze doubly rotated cut resonators under liquid loading.

Keywords

crystal resonators; organic compounds; quartz; Butterworth-Van Dyke equivalent circuit; SiO₂; damped compressional wave; damped shear wave; doubly rotated resonator; liquids; motional arm resistance; quartz resonators; resonant frequency; Coupling circuits; Equivalent circuits; Frequency measurement; Levee; Liquids; Resonant frequency; Rotation measurement; Surface acoustic waves; Surface impedance; Viscosity;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics, 2003 IEEE Symposium on

Print_ISBN

0-7803-7922-5

Type

conf

DOI

10.1109/ULTSYM.2003.1293355

Filename

1293355