A novel long-period fiber grating sensor for large strain measurement

Genda Chen; Hai Xiao; Ying Huang; Zhi Zhou; Yinan Zhang

doi:10.1117/12.817715

30 March 2009 A novel long-period fiber grating sensor for large strain measurement

Genda Chen, Hai Xiao, Ying Huang, Zhi Zhou, Yinan Zhang

Proceedings Volume 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009; 729212 (2009) https://doi.org/10.1117/12.817715
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

Abstract

Critical buildings such as hospitals and police stations must remain functional immediately following a major earthquake event. Due to earthquake effects, they often experience large strains, leading to progressive collapses. Therefore, monitoring and assessing the large strain condition of critical buildings is of paramount importance to post-earthquake responses and evacuations in earthquake-prone regions. In this study, a novel large strain sensor based on the long period fiber grating (LPFG) technology is proposed and developed. CO2 laser induced LPFG sensors are characterized for such mechanical properties as strain sensitivity in extension and flexure, sensor stability, and measurement range. For practical applications, the need for LPFG sensor packaging is identified and verified in laboratory implementations. By introducing various strain transfer mechanisms, the strain sensitivity of LPFG sensors can be customized for different applications at corresponding strain transfer ratios.

Citation Download Citation

Genda Chen, Hai Xiao, Ying Huang, Zhi Zhou, and Yinan Zhang "A novel long-period fiber grating sensor for large strain measurement", Proc. SPIE 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009, 729212 (30 March 2009); https://doi.org/10.1117/12.817715

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