Translator Disclaimer
1 April 2010 Unpowered antenna sensor for crack detection and measurement
Author Affiliations +
This paper presents an unpowered wireless sensor for crack detection and monitoring. The sensor is based on the principle of microstrip patch antenna, which is essentially an electromagnetic cavity that radiates at certain resonant frequencies. These resonant frequencies are sensitive to the dimensions of the antenna patch as well as the electrical properties of its ground plane. If a metallic structure serves as the ground plane of the patch antenna, crack development in the metallic structure will cause the resonant frequencies of the patch antenna to shift. Therefore, by measuring the resonant frequencies of the antenna, crack presence in a metallic structure can be quantitatively characterized. Remote interrogation of the antenna sensor using a microwave radar system is explained. Fabrication and characterization of the antenna sensor for crack monitoring is presented.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Srikar Deshmukh, Irshad Mohammad, Xiang Xu, and Haiying Huang "Unpowered antenna sensor for crack detection and measurement", Proc. SPIE 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010, 764742 (1 April 2010);

Back to Top