SH-SAW taste sensor based on acoustoelectric interaction

Author

Kondoh, Jun ; Shiokawa, Shigeki

Author_Institution

Fac. of Eng., Shizuoka Univ., Hamamatsu

fYear

1993

fDate

31 Oct-3 Nov 1993

Firstpage

421

Abstract

This paper aims at discussing an application of SH-SAW devices on 36° rotated Y cut, X-propagating LiTaO₃ to a taste sensor for identifying liquid samples. Theoretical sensor sensitivity for the acoustoelectric interaction with a liquid-loading on the SAW propagation surface was derived. The results strongly suggested that by employing different center frequency SH-SAW devices, the sensor can recognize many liquid samples without coating materials. In the experiment, we fabricated a taste sensor consisting of three SH-SAW devices at the center frequencies 30, 50, and 100 MHz, respectively. Identification of samples, 11 kinds of fruit juices, was achieved by classification in principal-component analysis and discriminant analysis. Since the SH-SAW sensor without a coating film has intrinsically good reproducibility and stability, it is an effective sensor for identifying and controlling the taste samples

Keywords

acoustoelectric transducers; electric sensing devices; piezoelectric devices; surface acoustic wave devices; ultrasonic applications; ultrasonic transducers; 100 MHz; 30 MHz; 50 MHz; LiTaO₃; SH-SAW device; X-propagating LiTaO₃; Y cut; acoustoelectric interaction; center frequency; discriminant analysis; fruit juice; liquid; principal-component analysis; taste sensor; Acoustic sensors; Acoustic signal detection; Acoustic waves; Coatings; Conductivity; Electromechanical sensors; Frequency; Permittivity; Sensor phenomena and characterization; Surface acoustic waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1993. Proceedings., IEEE 1993

Conference_Location

Baltimore, MD

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1993.339457

Filename

339457