Thermal effects on a passive wireless antenna sensor for strain and crack sensing

Xiaohua Yi; Rushi Vyas; Chunhee Cho; Chia-Hung Fang; James Cooper; Yang Wang; Roberto T. Leon; Manos M. Tentzeris

doi:10.1117/12.914833

3 April 2012 Thermal effects on a passive wireless antenna sensor for strain and crack sensing

Xiaohua Yi, Rushi Vyas, Chunhee Cho, Chia-Hung Fang, James Cooper, Yang Wang, Roberto T. Leon, Manos M. Tentzeris

Proceedings Volume 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012; 83450F (2012) https://doi.org/10.1117/12.914833
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

For application in structural health monitoring, a folded patch antenna has been previously designed as a wireless sensor that monitors strain and crack in metallic structures. Resonance frequency of the RFID patch antenna is closely related with its dimension. To measure stress concentration in a base structure, the sensor is bonded to the structure like a traditional strain gage. When the antenna sensor is under strain/deformation together with the base structure, the antenna resonance frequency varies accordingly. The strain-related resonance frequency variation is wirelessly interrogated and recorded by a reader, and can be used to derive strain/deformation. Material properties of the antenna components can have significant effects on sensor performance. This paper investigates thermal effects through both numerical simulation and temperature chamber testing. When temperature fluctuates, previous sensor design (with a glass microfiber-reinforced PTFE substrate) shows relatively large variation in resonance frequency. To improve sensor performance, a new ceramic-filled PTFE substrate material is chosen for re-designing the antenna sensor. Temperature chamber experiments are also conducted to the sensor with new substrate material, and compared with previous design.

Citation Download Citation

Xiaohua Yi, Rushi Vyas, Chunhee Cho, Chia-Hung Fang, James Cooper, Yang Wang, Roberto T. Leon, and Manos M. Tentzeris "Thermal effects on a passive wireless antenna sensor for strain and crack sensing", Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 83450F (3 April 2012); https://doi.org/10.1117/12.914833

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available