City Research Online

Development of a high-sensitivity and adjustable FBG strain sensor for structural monitoring

Qin, H., Li, C., Zhu, J. , Luo, B. & Fu, F. ORCID: 0000-0002-9176-8159 (2023). Development of a high-sensitivity and adjustable FBG strain sensor for structural monitoring. Structural Control and Health Monitoring, 2023, article number 6665803. doi: 10.1155/2023/6665803


In this paper, a new fiber Bragg grating (FBG ) strain sensor with adjustable sensitivity is invented. The sensitivity adjustment, strain sensing, and temperature compensation principles of the sensor and the corresponding formulae are developed. The prototype sensor specimen is developed, and a series of tests are performed to investigate its strain sensitivity and temperature compensation characteristics. The results show that the strain sensitivity of the sensor can be adjusted effectively by the correspondent L/LFBG parameter, with an acceptable discrepancy within ± 5% of the theoretical value. The linearity, repeatability, and hysteresis were analyzed, and the errors were 0.98%, 1.15%, and 0.09%, respectively, with excellent performance. When the temperature difference was 20°C, through temperature compensation calibration, the error between the monitored strain and the actual strain was within 5% after temperature compensation correction, showing that this new type of FBG strain sensor can meet the strain monitoring needs of various engineering structures and provide reliable data acquisition.

Publication Type: Article
Additional Information: Copyright © 2023 Heying Qin et al. +is is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Publisher Keywords: fiber Bragg grating; adjustable sensitivity; strain sensor; temperature compensation; structural health monitoring
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Science & Technology > Engineering
SWORD Depositor:
[thumbnail of 6665803.pdf]
Text - Published Version
Available under License Creative Commons: Attribution International Public License 4.0.

Download (1MB) | Preview
[thumbnail of 11.7 Final Manuscript-city deposit.pdf]
Text - Accepted Version
Download (909kB) | Preview


Add to AnyAdd to TwitterAdd to FacebookAdd to LinkedinAdd to PinterestAdd to Email


Downloads per month over past year

View more statistics

Actions (login required)

Admin Login Admin Login