Электронный язык на поверхностных акустических волнах

Abstract

Design and experimental results of a surface acoustic wave (SAW) microsensor with polymer microfluidic cell for the sensing and identification of liquids is presented in this article. This microsensor, which is a part of a smart electronic tongue system, uses for the detection and identification of liquids. The design consists of a dual-delay-line configuration in which one line is free and other one is metallized. Synthetic samples were analyzed with the four basic tastes of sour, salt, bitter, and sweet. The electronic tongue classified correctly all of the different basic tastes without a selective biological or chemical coating. Theory relating to the electro-acoustic properties represented by the relative permittivity and conductivity of the sample liquid is presented and related to experimental results.