Abstract

In this paper, a structural damage identification algorithm based on a single fiber Bragg grating (FBG) sensor is proposed. The signal detected by the FBG can be analyzed by the wavelet packet decomposition and back propagation neural network to obtain the damage location information. A high-speed FBG demodulation system based on a tunable Fabry–Perot filter and unbalanced Mach–Zehnder (M-Z) interferometer is designed to respond to a signal with a frequency range from 0 to 4 kHz, which will increase the sensing accuracy. This algorithm is verified by the aluminum plate model, which can simulate the generation of damage in reality. The experimental results show that a single FBG sensor is enough to realize accurate damage location identification according to this algorithm, and identification accuracy can reach 90.0%.

© 2019 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Wavelength detection of model-sharing fiber Bragg grating sensor networks using long short-term memory neural network

Hao Jiang, Qiying Zeng, Jing Chen, Xiaojie Qiu, Xinyu Liu, Zhenghua Chen, and Xiren Miao
Opt. Express 27(15) 20583-20596 (2019)

Simultaneous demodulation technique for a multiplexed fiber Fizeau interferometer and fiber Bragg grating sensor system

Allan C. Wong, Paul A. Childs, and Gang-Ding Peng
Opt. Lett. 31(1) 23-25 (2006)

Using maximum spectrum of continuous wavelet transform for demodulation of an overlapped spectrum in a fiber Bragg grating sensor network

Ying Hu, Wenqin Mo, Kaifeng Dong, Fang Jin, and Junlei Song
Appl. Opt. 55(17) 4670-4675 (2016)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (11)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription