Author

Xin Xu

Date of Award

12-2020

Document Type

Thesis - Open Access

Degree Name

Master of Science in Aerospace Engineering

Department

Aerospace Engineering

Committee Chair

Dr. Daewon Kim

First Committee Member

Dr. Eduardo Rojas

Second Committee Member

Dr. Mandar Kulkarni

Abstract

A surface acoustic wave (SAW) sensor can have broad industrial applications due to its compact size, low cost-effectiveness, and versatility of sensible measurands, as well as the wireless capabilities. In this study, a theoretical modeling approach accompanied by a MATLAB-based algorithm of the SAW device is first presented. With the designed dimensional parameters and selected material properties, numerical analyses are performed using COMSOL Multiphysics to validate the theoretical results. Various postprocessing responses of the propagated SAWs in both time and frequency domains, such as time delay, insertion loss, and frequency shift, are examined to evaluate the device performances. Also, the sensing mechanisms of multiple sensing measurands, such as mechanical strain and temperature, are investigated by scrutinizing the changes of the wave characteristics.

Share

COinS